ChangeLog 2.0 MB

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  1. Changes in version 0.4.8.11 - 2024-04-10
  2. This is a minor release mostly to upgrade the fallbackdir list.
  3. Directory authorities running this version will now automatically
  4. reject relays running the end of life 0.4.7.x version.
  5. o Minor features (directory authorities):
  6. - Reject 0.4.7.x series at the authority level. Closes ticket 40896.
  7. - New IP address and keys for tor26.
  8. - Allow BandwidthFiles "node_id" KeyValue without the dollar sign at
  9. the start of the hexdigit, in order to easier database queries
  10. combining Tor documents in which the relays fingerprint does not
  11. include it. Fixes bug 40891; bugfix on 0.4.7 (all supported
  12. versions of Tor).
  13. o Minor features (fallbackdir):
  14. - Regenerate fallback directories generated on April 10, 2024.
  15. o Minor features (geoip data):
  16. - Update the geoip files to match the IPFire Location Database, as
  17. retrieved on 2024/04/10.
  18. o Minor bugfixes (directory authorities):
  19. - Add a warning when publishing a vote or signatures to another
  20. directory authority fails. Fixes bug 40910; bugfix on 0.2.0.3-alpha.
  21. Changes in version 0.4.8.10 - 2023-12-08
  22. This is a security release fixing a high severity bug (TROVE-2023-007)
  23. affecting Exit relays supporting Conflux. We strongly recommend to update as
  24. soon as possible.
  25. o Major bugfixes (TROVE-2023-007, exit):
  26. - Improper error propagation from a safety check in conflux leg
  27. linking led to a desynchronization of which legs were part of a
  28. conflux set, ultimately causing a UAF and NULL pointer dereference
  29. crash on Exit relays. Fixes bug 40897; bugfix on 0.4.8.1-alpha.
  30. o Minor features (fallbackdir):
  31. - Regenerate fallback directories generated on December 08, 2023.
  32. o Minor features (geoip data):
  33. - Update the geoip files to match the IPFire Location Database, as
  34. retrieved on 2023/12/08.
  35. o Minor bugfixes (bridges, statistics):
  36. - Correctly report statistics for client count over pluggable
  37. transports. Fixes bug 40871; bugfix on 0.4.8.4.
  38. Changes in version 0.4.8.9 - 2023-11-09
  39. This is another security release fixing a high severity bug affecting onion
  40. services which is tracked by TROVE-2023-006. We are also releasing a guard
  41. major bugfix as well. If you are an onion service operator, we strongly
  42. recommend to update as soon as possible.
  43. o Major bugfixes (guard usage):
  44. - When Tor excluded a guard due to temporary circuit restrictions,
  45. it considered *additional* primary guards for potential usage by
  46. that circuit. This could result in more than the specified number
  47. of guards (currently 2) being used, long-term, by the tor client.
  48. This could happen when a Guard was also selected as an Exit node,
  49. but it was exacerbated by the Conflux guard restrictions. Both
  50. instances have been fixed. Fixes bug 40876; bugfix
  51. on 0.3.0.1-alpha.
  52. o Major bugfixes (onion service, TROVE-2023-006):
  53. - Fix a possible hard assert on a NULL pointer when recording a
  54. failed rendezvous circuit on the service side for the MetricsPort.
  55. Fixes bug 40883; bugfix on 0.4.8.1-alpha.
  56. o Minor features (fallbackdir):
  57. - Regenerate fallback directories generated on November 09, 2023.
  58. o Minor features (geoip data):
  59. - Update the geoip files to match the IPFire Location Database, as
  60. retrieved on 2023/11/09.
  61. Changes in version 0.4.8.8 - 2023-11-03
  62. We are releasing today a fix for a high security issue, TROVE-2023-004, that
  63. is affecting relays. Also a few minor bugfixes detailed below. Please upgrade
  64. as soon as posssible.
  65. o Major bugfixes (TROVE-2023-004, relay):
  66. - Mitigate an issue when Tor compiled with OpenSSL can crash during
  67. handshake with a remote relay. Fixes bug 40874; bugfix
  68. on 0.2.7.2-alpha.
  69. o Minor features (fallbackdir):
  70. - Regenerate fallback directories generated on November 03, 2023.
  71. o Minor features (geoip data):
  72. - Update the geoip files to match the IPFire Location Database, as
  73. retrieved on 2023/11/03.
  74. o Minor bugfixes (directory authority):
  75. - Look at the network parameter "maxunmeasuredbw" with the correct
  76. spelling. Fixes bug 40869; bugfix on 0.4.6.1-alpha.
  77. o Minor bugfixes (vanguards addon support):
  78. - Count the conflux linked cell as valid when it is successfully
  79. processed. This will quiet a spurious warn in the vanguards addon.
  80. Fixes bug 40878; bugfix on 0.4.8.1-alpha.
  81. Changes in version 0.4.8.7 - 2023-09-25
  82. This version fixes a single major bug in the Conflux subsystem on the client
  83. side. See below for more information. The upcoming Tor Browser 13 stable will
  84. pick this up.
  85. o Major bugfixes (conflux):
  86. - Fix an issue that prevented us from pre-building more conflux sets
  87. after existing sets had been used. Fixes bug 40862; bugfix
  88. on 0.4.8.1-alpha.
  89. o Minor features (fallbackdir):
  90. - Regenerate fallback directories generated on September 25, 2023.
  91. o Minor features (geoip data):
  92. - Update the geoip files to match the IPFire Location Database, as
  93. retrieved on 2023/09/25.
  94. Changes in version 0.4.8.6 - 2023-09-18
  95. This version contains an important fix for onion service regarding congestion
  96. control and its reliability. Apart from that, unneeded BUG warnings have been
  97. suppressed especially about a compression bomb seen on relays. We strongly
  98. recommend, in particular onion service operators, to upgrade as soon as
  99. possible to this latest stable.
  100. o Major bugfixes (onion service):
  101. - Fix a reliability issue where services were expiring their
  102. introduction points every consensus update. This caused
  103. connectivity issues for clients caching the old descriptor and
  104. intro points. Bug reported and fixed by gitlab user
  105. @hyunsoo.kim676. Fixes bug 40858; bugfix on 0.4.7.5-alpha.
  106. o Minor features (debugging, compression):
  107. - Log the input and output buffer sizes when we detect a potential
  108. compression bomb. Diagnostic for ticket 40739.
  109. o Minor features (fallbackdir):
  110. - Regenerate fallback directories generated on September 18, 2023.
  111. o Minor features (geoip data):
  112. - Update the geoip files to match the IPFire Location Database, as
  113. retrieved on 2023/09/18.
  114. o Minor bugfix (defensive programming):
  115. - Disable multiple BUG warnings of a missing relay identity key when
  116. starting an instance of Tor compiled without relay support. Fixes
  117. bug 40848; bugfix on 0.4.3.1-alpha.
  118. o Minor bugfixes (bridge authority):
  119. - When reporting a pseudo-networkstatus as a bridge authority, or
  120. answering "ns/purpose/*" controller requests, include accurate
  121. published-on dates from our list of router descriptors. Fixes bug
  122. 40855; bugfix on 0.4.8.1-alpha.
  123. o Minor bugfixes (compression, zstd):
  124. - Use less frightening language and lower the log-level of our run-
  125. time ABI compatibility check message in our Zstd compression
  126. subsystem. Fixes bug 40815; bugfix on 0.4.3.1-alpha.
  127. Changes in version 0.4.8.5 - 2023-08-30
  128. Quick second release after the first stable few days ago fixing minor
  129. annoying bugfixes creating log BUG stacktrace. We also fix BSD compilation
  130. failures and PoW unit test.
  131. o Minor features (fallbackdir):
  132. - Regenerate fallback directories generated on August 30, 2023.
  133. o Minor features (geoip data):
  134. - Update the geoip files to match the IPFire Location Database, as
  135. retrieved on 2023/08/30.
  136. o Minor bugfix (NetBSD, compilation):
  137. - Fix compilation issue on NetBSD by avoiding an unnecessary
  138. dependency on "huge" page mappings in Equi-X. Fixes bug 40843;
  139. bugfix on 0.4.8.1-alpha.
  140. o Minor bugfix (NetBSD, testing):
  141. - Fix test failures in "crypto/hashx" and "slow/crypto/equix" on
  142. x86_64 and aarch64 NetBSD hosts, by adding support for
  143. PROT_MPROTECT() flags. Fixes bug 40844; bugfix on 0.4.8.1-alpha.
  144. o Minor bugfixes (conflux):
  145. - Demote a relay-side warn about too many legs to ProtocolWarn, as
  146. there are conditions that it can briefly happen during set
  147. construction. Also add additional set logging details for all
  148. error cases. Fixes bug 40841; bugfix on 0.4.8.1-alpha.
  149. - Prevent non-fatal assert stacktrace caused by using conflux sets
  150. during their teardown process. Fixes bug 40842; bugfix
  151. on 0.4.8.1-alpha.
  152. Changes in version 0.4.8.4 - 2023-08-23
  153. Finally, this is the very first stable release of the 0.4.8.x series making
  154. Proof-of-Work (prop#327) and Conflux (prop#329) available to the entire
  155. network. Some major bugfixes since the release candidate detailed below.
  156. o Major feature (denial of service):
  157. - Extend DoS protection to partially opened channels and known
  158. relays. Because re-entry is not allowed anymore, we can apply DoS
  159. protections onto known IP namely relays. Fixes bug 40821; bugfix
  160. on 0.3.5.1-alpha.
  161. o Major bugfixes (conflux):
  162. - Fix a relay-side crash caused by side effects of the fix for bug
  163. 40827. Reverts part of that fix that caused the crash and adds
  164. additional log messages to help find the root cause. Fixes bug
  165. 40834; bugfix on 0.4.8.3-rc.
  166. o Major bugfixes (proof of work, onion service, hashx):
  167. - Fix a very rare buffer overflow in hashx, specific to the dynamic
  168. compiler on aarch64 platforms. Fixes bug 40833; bugfix
  169. on 0.4.8.2-alpha.
  170. o Minor features (fallbackdir):
  171. - Regenerate fallback directories generated on August 23, 2023.
  172. o Minor features (geoip data):
  173. - Update the geoip files to match the IPFire Location Database, as
  174. retrieved on 2023/08/23.
  175. o Minor features (testing):
  176. - All Rust code is now linted (cargo clippy) as part of GitLab CI, and
  177. existing warnings have been fixed. - Any unit tests written in Rust now
  178. run as part of GitLab CI.
  179. o Minor bugfix (FreeBSD, compilation):
  180. - Fix compilation issue on FreeBSD by properly importing
  181. sys/param.h. Fixes bug 40825; bugfix on 0.4.8.1-alpha.
  182. o Minor bugfixes (compression):
  183. - Right after compression/decompression work is done, check for
  184. errors. Before this, we would consider compression bomb before
  185. that and then looking for errors leading to false positive on that
  186. log warning. Fixes bug 40739; bugfix on 0.3.5.1-alpha. Patch
  187. by "cypherpunks".
  188. Changes in version 0.4.8.3-rc - 2023-08-04
  189. This is the first release candidate (and likely the only) of the 0.4.8.x
  190. series. We fixed a major conflux bugfix which was a fatal asserts on the
  191. relay Exit side. See below for more details. Couple minor bugfixes. Until
  192. stable, name of the game here is stabilization.
  193. o Major bugfixes (conflux):
  194. - Fix a relay-side assert crash caused by attempts to use a conflux
  195. circuit between circuit close and free, such that no legs were on
  196. the conflux set. Fixed by nulling out the stream's circuit back-
  197. pointer when the last leg is removed. Additional checks and log
  198. messages have been added to detect other cases. Fixes bug 40827;
  199. bugfix on 0.4.8.1-alpha.
  200. o Minor features (fallbackdir):
  201. - Regenerate fallback directories generated on August 04, 2023.
  202. - Regenerate fallback directories generated on July 26, 2023.
  203. o Minor features (geoip data):
  204. - Update the geoip files to match the IPFire Location Database, as
  205. retrieved on 2023/07/26.
  206. - Update the geoip files to match the IPFire Location Database, as
  207. retrieved on 2023/08/04.
  208. o Minor features (bridge):
  209. - warn when a bridge is also configure to be an exit relay.
  210. Closes ticket 40819.
  211. o Minor bugfixes (compilation):
  212. - Fix all -Werror=enum-int-mismatch warnings. No behavior change.
  213. Fixes bug 40824; bugfix on 0.3.5.1-alpha.
  214. o Minor bugfixes (protocol warn):
  215. - Wrap a handful of cases where ProtocolWarning logs could emit IP
  216. addresses. Fixes bug 40828; bugfix on 0.3.5.1-alpha.
  217. Changes in version 0.4.8.2-alpha - 2023-07-12
  218. This is our second alpha containing some minor bugfixes and one major bugfix
  219. about L2 vanguard rotation. We believe this will be the last alpha before the
  220. rc in a couple of weeks.
  221. o Major bugfixes (vanguards):
  222. - Rotate to a new L2 vanguard whenever an existing one loses the
  223. Stable or Fast flag. Previously, we would leave these relays in
  224. the L2 vanguard list but never use them, and if all of our
  225. vanguards end up like this we wouldn't have any middle nodes left
  226. to choose from so we would fail to make onion-related circuits.
  227. Fixes bug 40805; bugfix on 0.4.7.1-alpha.
  228. o Minor feature (hs):
  229. - Fix compiler warnings in equix and hashx when building with clang.
  230. Closes ticket 40800.
  231. o Minor features (fallbackdir):
  232. - Regenerate fallback directories generated on July 12, 2023.
  233. o Minor features (geoip data):
  234. - Update the geoip files to match the IPFire Location Database, as
  235. retrieved on 2023/07/12.
  236. o Minor bugfix (congestion control):
  237. - Reduce the accepted range of a circuit's negotiated 'cc_sendme_inc'
  238. to be +/- 1 from the consensus parameter value. Fixes bug 40569;
  239. bugfix on 0.4.7.4-alpha.
  240. - Remove unused congestion control algorithms and BDP calculation
  241. code, now that we have settled on and fully tuned Vegas. Fixes bug
  242. 40566; bugfix on 0.4.7.4-alpha.
  243. - Update default congestion control parameters to match consensus.
  244. Fixes bug 40709; bugfix on 0.4.7.4-alpha.
  245. o Minor bugfixes (compilation):
  246. - Fix "initializer is not a constant" compilation error that
  247. manifests itself on gcc versions < 8.1 and MSVC. Fixes bug 40773;
  248. bugfix on 0.4.8.1-alpha
  249. o Minor bugfixes (conflux):
  250. - Count leg launch attempts prior to attempting to launch them. This
  251. avoids inifinite launch attempts due to internal circuit building
  252. failures. Additionally, double-check that we have enough exits in
  253. our consensus overall, before attempting to launch conflux sets.
  254. Fixes bug 40811; bugfix on 0.4.8.1-alpha.
  255. - Fix a case where we were resuming reading on edge connections that
  256. were already marked for close. Fixes bug 40801; bugfix
  257. on 0.4.8.1-alpha.
  258. - Fix stream attachment order when creating conflux circuits, so
  259. that stream attachment happens after finishing the full link
  260. handshake, rather than upon set finalization. Fixes bug 40801;
  261. bugfix on 0.4.8.1-alpha.
  262. - Handle legs being closed or destroyed before computing an RTT
  263. (resulting in warns about too many legs). Fixes bug 40810; bugfix
  264. on 0.4.8.1-alpha.
  265. - Remove a "BUG" warning from conflux_pick_first_leg that can be
  266. triggered by broken or malicious clients. Fixes bug 40801; bugfix
  267. on 0.4.8.1-alpha.
  268. o Minor bugfixes (KIST):
  269. - Prevent KISTSchedRunInterval from having values of 0 or 1, neither
  270. of which work properly. Additionally, make a separate
  271. KISTSchedRunIntervalClient parameter, so that the client and relay
  272. KIST values can be set separately. Set the default of both to 2ms.
  273. Fixes bug 40808; bugfix on 0.3.2.1-alpha.
  274. Changes in version 0.4.8.1-alpha - 2023-06-01
  275. This is the first alpha of the 0.4.8.x series. Two major features in this
  276. version which are Conflux and onion service Proof-of-Work (PoW). There are
  277. also many small features in particular, worth noting, the MetricsPort is now
  278. exporting more relay and onion service metrics. Finally, there are
  279. also numerous minor bugfixes included in this version.
  280. o Major features (onion service, proof-of-work):
  281. - Implement proposal 327 (Proof-Of-Work). This is aimed at thwarting
  282. introduction flooding DoS attacks by introducing a dynamic Proof-Of-Work
  283. protocol that occurs over introduction circuits. This introduces several
  284. torrc options prefixed with "HiddenServicePoW" in order to control this
  285. feature. By default, this is disabled. Closes ticket 40634.
  286. o Major features (conflux):
  287. - Implement Proposal 329 (conflux traffic splitting). Conflux splits
  288. traffic across two circuits to Exits that support the protocol.
  289. These circuits are pre-built only, which means that if the pre-
  290. built conflux pool runs out, regular circuits will then be used.
  291. When using conflux circuit pairs, clients choose the lower-latency
  292. circuit to send data to the Exit. When the Exit sends data to the
  293. client, it maximizes throughput, by fully utilizing both circuits
  294. in a multiplexed fashion. Alternatively, clients can request that
  295. the Exit optimize for latency when transmitting to them, by
  296. setting the torrc option 'ConfluxClientUX latency'. Onion services
  297. are not currently supported, but will be in arti. Many other
  298. future optimizations will also be possible using this protocol.
  299. Closes ticket 40593.
  300. o Major features (dirauth):
  301. - Directory authorities and relays now interact properly with
  302. directory authorities if they change addresses. In the past, they
  303. would continue to upload votes, signatures, descriptors, etc to
  304. the hard-coded address in the configuration. Now, if the directory
  305. authority is listed in the consensus at a different address, they
  306. will direct queries to this new address. Implements ticket 40705.
  307. o Minor feature (CI):
  308. - Update CI to use Debian Bullseye for runners.
  309. o Minor feature (client, IPv6):
  310. - Make client able to pick IPv6 relays by default now meaning
  311. ClientUseIPv6 option now defaults to 1. Closes ticket 40785.
  312. o Minor feature (compilation):
  313. - Fix returning something other than "Unknown N/A" as libc version
  314. if we build tor on an O.S. like DragonFlyBSD, FreeBSD, OpenBSD
  315. or NetBSD.
  316. o Minor feature (cpuworker):
  317. - Always use the number of threads for our CPU worker pool to the
  318. number of core available but cap it to a minimum of 2 in case of a
  319. single core. Fixes bug 40713; bugfix on 0.3.5.1-alpha.
  320. o Minor feature (lzma):
  321. - Fix compiler warnings for liblzma >= 5.3.1. Closes ticket 40741.
  322. o Minor feature (MetricsPort, relay):
  323. - Expose time until online keys expires on the MetricsPort. Closes
  324. ticket 40546.
  325. o Minor feature (MetricsPort, relay, onion service):
  326. - Add metrics for the relay side onion service interactions counting
  327. seen cells. Closes ticket 40797. Patch by "friendly73".
  328. o Minor features (directory authorities):
  329. - Directory authorities now include their AuthDirMaxServersPerAddr
  330. config option in the consensus parameter section of their vote.
  331. Now external tools can better predict how they will behave.
  332. Implements ticket 40753.
  333. o Minor features (directory authority):
  334. - Add a new consensus method in which the "published" times on
  335. router entries in a microdesc consensus are all set to a
  336. meaningless fixed date. Doing this will make the download size for
  337. compressed microdesc consensus diffs much smaller. Part of ticket
  338. 40130; implements proposal 275.
  339. o Minor features (network documents):
  340. - Clients and relays no longer track the "published on" time
  341. declared for relays in any consensus documents. When reporting
  342. this time on the control port, they instead report a fixed date in
  343. the future. Part of ticket 40130.
  344. o Minor features (fallbackdir):
  345. - Regenerate fallback directories generated on June 01, 2023.
  346. o Minor features (geoip data):
  347. - Update the geoip files to match the IPFire Location Database, as
  348. retrieved on 2023/06/01.
  349. o Minor features (hs, metrics):
  350. - Add tor_hs_rend_circ_build_time and tor_hs_intro_circ_build_time
  351. histograms to measure hidden service rend/intro circuit build time
  352. durations. Part of ticket 40757.
  353. o Minor features (metrics):
  354. - Add a `reason` label to the HS error metrics. Closes ticket 40758.
  355. - Add service side metrics for REND and introduction request
  356. failures. Closes ticket 40755.
  357. - Add support for histograms. Part of ticket 40757.
  358. o Minor features (pluggable transports):
  359. - Automatically restart managed Pluggable Transport processes when
  360. their process terminate. Resolves ticket 33669.
  361. o Minor features (portability, compilation):
  362. - Use OpenSSL 1.1 APIs for LibreSSL, fixing LibreSSL 3.5
  363. compatibility. Fixes issue 40630; patch by Alex Xu (Hello71).
  364. o Minor features (relay):
  365. - Do not warn about configuration options that may expose a non-
  366. anonymous onion service. Closes ticket 40691.
  367. o Minor features (relays):
  368. - Trigger OOS when bind fails with EADDRINUSE. This improves
  369. fairness when a large number of exit connections are requested,
  370. and properly signals exhaustion to the network. Fixes issue 40597;
  371. patch by Alex Xu (Hello71).
  372. o Minor features (tests):
  373. - Avoid needless key reinitialization with OpenSSL during unit
  374. tests, saving significant time. Patch from Alex Xu.
  375. o Minor bugfix (relay, logging):
  376. - The wrong max queue cell size was used in a protocol warning
  377. logging statement. Fixes bug 40745; bugfix on 0.4.7.1-alpha.
  378. o Minor bugfixes (logging):
  379. - Avoid ""double-quoting"" strings in several log messages. Fixes
  380. bug 22723; bugfix on 0.1.2.2-alpha.
  381. - Correct a log message when cleaning microdescriptors. Fixes bug
  382. 40619; bugfix on 0.2.5.4-alpha.
  383. o Minor bugfixes (metrics):
  384. - Decrement hs_intro_established_count on introduction circuit
  385. close. Fixes bug 40751; bugfix on 0.4.7.12.
  386. o Minor bugfixes (pluggable transports, windows):
  387. - Remove a warning `BUG()` that could occur when attempting to
  388. execute a non-existing pluggable transport on Windows. Fixes bug
  389. 40596; bugfix on 0.4.0.1-alpha.
  390. o Minor bugfixes (relay):
  391. - Remove a "BUG" warning for an acceptable race between a circuit
  392. close and considering that circuit active. Fixes bug 40647; bugfix
  393. on 0.3.5.1-alpha.
  394. - Remove a harmless "Bug" log message that can happen in
  395. relay_addr_learn_from_dirauth() on relays during startup. Finishes
  396. fixing bug 40231. Fixes bug 40523; bugfix on 0.4.5.4-rc.
  397. o Minor bugfixes (sandbox):
  398. - Allow membarrier for the sandbox. And allow rt_sigprocmask when
  399. compiled with LTTng. Fixes bug 40799; bugfix on 0.3.5.1-alpha.
  400. - Fix sandbox support on AArch64 systems. More "*at" variants of
  401. syscalls are now supported. Signed 32 bit syscall parameters are
  402. checked more precisely, which should lead to lower likelihood of
  403. breakages with future compiler and libc releases. Fixes bug 40599;
  404. bugfix on 0.4.4.3-alpha.
  405. o Minor bugfixes (state file):
  406. - Avoid a segfault if the state file doesn't contains TotalBuildTimes
  407. along CircuitBuildAbandonedCount being above 0. Fixes bug 40437;
  408. bugfix on 0.3.5.1-alpha.
  409. o Removed features:
  410. - Remove the RendPostPeriod option. This was primarily used in
  411. Version 2 Onion Services and after its deprecation isn't needed
  412. anymore. Closes ticket 40431. Patch by Neel Chauhan.
  413. Changes in version 0.4.7.13 - 2023-01-12
  414. This version contains three major bugfixes, two for relays and one for
  415. client being a security fix, TROVE-2022-002. We have added, for Linux, the
  416. support for IP_BIND_ADDRESS_NO_PORT for relays using OutboundBindAddress.
  417. We strongly recommend to upgrade to this version considering the important
  418. congestion control fix detailed below.
  419. o Major bugfixes (congestion control):
  420. - Avoid incrementing the congestion window when the window is not
  421. fully in use. Thia prevents overshoot in cases where long periods
  422. of low activity would allow our congestion window to grow, and
  423. then get followed by a burst, which would cause queue overload.
  424. Also improve the increment checks for RFC3742. Fixes bug 40732;
  425. bugfix on 0.4.7.5-alpha.
  426. o Major bugfixes (relay):
  427. - When opening a channel because of a circuit request that did not
  428. include an Ed25519 identity, record the Ed25519 identity that we
  429. actually received, so that we can use the channel for other
  430. circuit requests that _do_ list an Ed25519 identity. (Previously
  431. we had code to record this identity, but a logic bug caused it to
  432. be disabled.) Fixes bug 40563; bugfix on 0.3.0.1-alpha. Patch
  433. from "cypherpunks".
  434. o Major bugfixes (TROVE-2022-002, client):
  435. - The SafeSocks option had its logic inverted for SOCKS4 and
  436. SOCKS4a. It would let the unsafe SOCKS4 pass but not the safe
  437. SOCKS4a one. This is TROVE-2022-002 which was reported on
  438. Hackerone by "cojabo". Fixes bug 40730; bugfix on 0.3.5.1-alpha.
  439. o Minor feature (authority):
  440. - Reject 0.4.6.x series at the authority level. Closes ticket 40664.
  441. o Minor features (fallbackdir):
  442. - Regenerate fallback directories generated on January 12, 2023.
  443. o Minor features (geoip data):
  444. - Update the geoip files to match the IPFire Location Database, as
  445. retrieved on 2023/01/12.
  446. o Minor features (relays):
  447. - Set the Linux-specific IP_BIND_ADDRESS_NO_PORT option on outgoing
  448. sockets, allowing relays using OutboundBindAddress to make more
  449. outgoing connections than ephemeral ports, as long as they are to
  450. separate destinations. Related to issue 40597; patch by Alex
  451. Xu (Hello71).
  452. o Minor bugfixes (relay, metrics):
  453. - Fix typo in a congestion control label on the MetricsPort. Fixes
  454. bug 40727; bugfix on 0.4.7.12.
  455. o Minor bugfixes (sandbox, authority):
  456. - With the sandbox enabled, allow to write "my-consensus-
  457. {ns|microdesc}" and to rename them as well. Fixes bug 40729;
  458. bugfix on 0.3.5.1-alpha.
  459. o Code simplifications and refactoring:
  460. - Rely on actual error returned by the kernel when choosing what
  461. resource exhaustion to log. Fixes issue 40613; Fix
  462. on tor-0.4.6.1-alpha.
  463. Changes in version 0.4.5.16 - 2023-01-12
  464. This version has one major bugfix for relay and a security fix,
  465. TROVE-2022-002, affecting clients. We strongly recommend to upgrade to our
  466. 0.4.7.x stable series. As a reminder, this series is EOL on February 15th,
  467. 2023.
  468. o Major bugfixes (relay):
  469. - When opening a channel because of a circuit request that did not
  470. include an Ed25519 identity, record the Ed25519 identity that we
  471. actually received, so that we can use the channel for other
  472. circuit requests that _do_ list an Ed25519 identity. (Previously
  473. we had code to record this identity, but a logic bug caused it to
  474. be disabled.) Fixes bug 40563; bugfix on 0.3.0.1-alpha. Patch
  475. from "cypherpunks".
  476. o Major bugfixes (TROVE-2022-002, client):
  477. - The SafeSocks option had its logic inverted for SOCKS4 and
  478. SOCKS4a. It would let the unsafe SOCKS4 pass but not the safe
  479. SOCKS4a one. This is TROVE-2022-002 which was reported on
  480. Hackerone by "cojabo". Fixes bug 40730; bugfix on 0.3.5.1-alpha.
  481. o Minor features (fallbackdir):
  482. - Regenerate fallback directories generated on January 12, 2023.
  483. o Minor features (geoip data):
  484. - Update the geoip files to match the IPFire Location Database, as
  485. retrieved on 2023/01/12.
  486. Changes in version 0.4.7.12 - 2022-12-06
  487. This version contains a major change that is a new key for moria1. Also, new
  488. metrics are exported on the MetricsPort for the congestion control
  489. subsystem.
  490. o Directory authority changes (moria1):
  491. - Rotate the relay identity key and v3 identity key for moria1. They
  492. have been online for more than a decade and refreshing keys
  493. periodically is good practice. Advertise new ports too, to avoid
  494. confusion. Closes ticket 40722.
  495. o Minor feature (Congestion control metrics):
  496. - Add additional metricsport relay metrics for congestion control.
  497. Closes ticket 40724.
  498. o Minor features (fallbackdir):
  499. - Regenerate fallback directories generated on December 06, 2022.
  500. o Minor features (geoip data):
  501. - Update the geoip files to match the IPFire Location Database, as
  502. retrieved on 2022/12/06.
  503. o Minor bugfixes (cpuworker, relay):
  504. - Fix an off by one overload calculation on the number of CPUs being
  505. used by our thread pool. Fixes bug 40719; bugfix on 0.3.5.1-alpha.
  506. Changes in version 0.4.5.15 - 2022-12-06
  507. This version has several major changes for directory authorities. And a
  508. major bugfix on OSX. Again, we strongly recommend to upgrade to our 0.4.7.x
  509. series latest stable. This series is EOL on February 15th, 2023.
  510. o Directory authority changes (dizum):
  511. - Change dizum IP address. Closes ticket 40687.
  512. o Directory authority changes (Faravahar):
  513. - Remove Faravahar until its operator, Sina, set it back up online
  514. outside of Team Cymru network. Closes ticket 40688.
  515. o Directory authority changes (moria1):
  516. - Rotate the relay identity key and v3 identity key for moria1. They
  517. have been online for more than a decade and refreshing keys
  518. periodically is good practice. Advertise new ports too, to avoid
  519. confusion. Closes ticket 40722.
  520. o Major bugfixes (OSX):
  521. - Fix coarse-time computation on Apple platforms (like Mac M1) where
  522. the Mach absolute time ticks do not correspond directly to
  523. nanoseconds. Previously, we computed our shift value wrong, which
  524. led us to give incorrect timing results. Fixes bug 40684; bugfix
  525. on 0.3.3.1-alpha.
  526. o Major bugfixes (relay):
  527. - Improve security of our DNS cache by randomly clipping the TTL
  528. value. TROVE-2021-009. Fixes bug 40674; bugfix on 0.3.5.1-alpha.
  529. o Minor features (fallbackdir):
  530. - Regenerate fallback directories generated on December 06, 2022.
  531. o Minor features (geoip data):
  532. - Update the geoip files to match the IPFire Location Database, as
  533. retrieved on 2022/12/06.
  534. Changes in version 0.4.7.11 - 2022-11-10
  535. This version contains several major fixes aimed at helping defend against
  536. network denial of service. It is also extending drastically the MetricsPort
  537. for relays to help us gather more internal data to investigate performance
  538. and attacks.
  539. We strongly recommend to upgrade to this version especially for Exit relays
  540. in order to help the network defend against this ongoing DDoS.
  541. o Directory authority changes (dizum, Faravahar):
  542. - Change dizum IP address. Closes ticket 40687.
  543. - Remove Faravahar until its operator, Sina, set it back up online
  544. outside of Team Cymru network. Closes ticket 40688.
  545. o Major bugfixes (geoip data):
  546. - IPFire informed us on August 12th that databases generated after
  547. (including) August 10th did not have proper ARIN network
  548. allocations. We are updating the database to use the one generated
  549. on August 9th, 2022. Fixes bug 40658; bugfix on 0.4.5.13.
  550. o Major bugfixes (onion service):
  551. - Set a much higher circuit build timeout for opened client rendezvous
  552. circuit. Before this, tor would time them out very quickly leading to
  553. unnecessary retries meaning more load on the network. Fixes bug 40694;
  554. bugfix on 0.3.5.1-alpha.
  555. o Major bugfixes (OSX):
  556. - Fix coarse-time computation on Apple platforms (like Mac M1) where
  557. the Mach absolute time ticks do not correspond directly to
  558. nanoseconds. Previously, we computed our shift value wrong, which
  559. led us to give incorrect timing results. Fixes bug 40684; bugfix
  560. on 0.3.3.1-alpha.
  561. o Major bugfixes (relay):
  562. - Improve security of our DNS cache by randomly clipping the TTL
  563. value. TROVE-2021-009. Fixes bug 40674; bugfix on 0.3.5.1-alpha.
  564. o Minor feature (Mac and iOS build):
  565. - Change how combine_libs works on Darwin like platforms to make
  566. sure we don't include any `__.SYMDEF` and `__.SYMDEF SORTED`
  567. symbols on the archive before we repack and run ${RANLIB} on the
  568. archive. This fixes a build issue with recent Xcode versions on
  569. Mac Silicon and iOS. Closes ticket 40683.
  570. o Minor feature (metrics):
  571. - Add various congestion control counters to the MetricsPort. Closes
  572. ticket 40708.
  573. o Minor feature (performance):
  574. - Bump the maximum amount of CPU that can be used from 16 to 128. Note
  575. that NumCPUs torrc option overrides this hardcoded maximum. Fixes bug
  576. 40703; bugfix on 0.3.5.1-alpha.
  577. o Minor feature (relay):
  578. - Make an hardcoded value for the maximum of per CPU tasks into a
  579. consensus parameter.
  580. - Two new consensus parameters are added to control the wait time in
  581. queue of the onionskins. One of them is the torrc
  582. MaxOnionQueueDelay options which supersedes the consensus
  583. parameter. Closes ticket 40704.
  584. o Minor feature (relay, DoS):
  585. - Apply circuit creation anti-DoS defenses if the outbound circuit
  586. max cell queue size is reached too many times. This introduces two
  587. new consensus parameters to control the queue size limit and
  588. number of times allowed to go over that limit. Closes ticket 40680.
  589. o Minor feature (relay, metrics):
  590. - Add DoS defenses counter to MetricsPort.
  591. - Add congestion control RTT reset counter to MetricsPort.
  592. - Add counters to the MetricsPort how many connections, per type,
  593. are currently opened and how many were created.
  594. - Add relay flags from the consensus to the MetricsPort.
  595. - Add total number of opened circuits to MetricsPort.
  596. - Add total number of streams seen by an Exit to the MetricsPort.
  597. - Add traffic stats as in number of read/written bytes in total.
  598. - Related to ticket 40194.
  599. o Minor features (fallbackdir):
  600. - Regenerate fallback directories generated on November 10, 2022.
  601. o Minor features (geoip data):
  602. - Update the geoip files to match the IPFire Location Database, as
  603. retrieved on 2022/11/10.
  604. o Minor bugfixes (authorities, sandbox):
  605. - Allow to write file my-consensus-<flavor-name> to disk when
  606. sandbox is activated. Fixes bug 40663; bugfix on 0.3.5.1-alpha.
  607. o Minor bugfixes (dirauth):
  608. - Directory authorities stop voting a consensus "Measured" weight
  609. for relays with the Authority flag. Now these relays will be
  610. considered unmeasured, which should reserve their bandwidth for
  611. their dir auth role and minimize distractions from other roles. In
  612. place of the "Measured" weight, they now include a
  613. "MeasuredButAuthority" weight (not used by anything) so the
  614. bandwidth authority's opinion on this relay can be recorded for
  615. posterity. Lastly, remove the AuthDirDontVoteOnDirAuthBandwidth
  616. torrc option which never worked right. Fixes bugs 40698 and 40700;
  617. bugfix on 0.4.7.2-alpha.
  618. o Minor bugfixes (onion service client):
  619. - A collapsing onion service circuit should be seen as an
  620. "unreachable" error so it can be retried. Fixes bug 40692; bugfix
  621. on 0.3.5.1-alpha.
  622. o Minor bugfixes (onion service):
  623. - Make the service retry a rendezvous if the circuit is being
  624. repurposed for measurements. Fixes bug 40696; bugfix
  625. on 0.3.5.1-alpha.
  626. o Minor bugfixes (relay overload statistics):
  627. - Count total create cells vs dropped create cells properly, when
  628. assessing if our fraction of dropped cells is too high. We only
  629. count non-client circuits in the denominator, but we would include
  630. client circuits in the numerator, leading to surprising log lines
  631. claiming that we had dropped more than 100% of incoming create
  632. cells. Fixes bug 40673; bugfix on 0.4.7.1-alpha.
  633. o Code simplification and refactoring (bridges):
  634. - Remove unused code related to ExtPort connection ID. Fixes bug
  635. 40648; bugfix on 0.3.5.1-alpha.
  636. Changes in version 0.4.7.10 - 2022-08-12
  637. This version updates the geoip cache that we generate from IPFire location
  638. database to use the August 9th, 2022 one. Everyone MUST update to this
  639. latest release else circuit path selection and relay metrics are badly
  640. affected.
  641. o Major bugfixes (geoip data):
  642. - IPFire informed us on August 12th that databases generated after
  643. (including) August 10th did not have proper ARIN network allocations. We
  644. are updating the database to use the one generated on August 9th, 2022.
  645. Fixes bug 40658; bugfix on 0.4.7.9.
  646. Changes in version 0.4.6.12 - 2022-08-12
  647. This version updates the geoip cache that we generate from IPFire location
  648. database to use the August 9th, 2022 one. Everyone MUST update to this
  649. latest release else circuit path selection and relay metrics are badly
  650. affected.
  651. o Major bugfixes (geoip data):
  652. - IPFire informed us on August 12th that databases generated after
  653. (including) August 10th did not have proper ARIN network allocations. We
  654. are updating the database to use the one generated on August 9th, 2022.
  655. Fixes bug 40658; bugfix on 0.4.6.11.
  656. Changes in version 0.4.5.14 - 2022-08-12
  657. This version updates the geoip cache that we generate from IPFire location
  658. database to use the August 9th, 2022 one. Everyone MUST update to this
  659. latest release else circuit path selection and relay metrics are badly
  660. affected.
  661. o Major bugfixes (geoip data):
  662. - IPFire informed us on August 12th that databases generated after
  663. (including) August 10th did not have proper ARIN network allocations. We
  664. are updating the database to use the one generated on August 9th, 2022.
  665. Fixes bug 40658; bugfix on 0.4.5.13.
  666. Changes in version 0.4.7.9 - 2022-08-11
  667. This version contains several major fixes aimed at reducing memory pressure on
  668. relays and possible side-channel. It also contains a major bugfix related to
  669. congestion control also aimed at reducing memory pressure on relays.
  670. Finally, there is last one major bugfix related to Vanguard L2 layer node
  671. selection.
  672. We strongly recommend to upgrade to this version especially for Exit relays
  673. in order to help the network defend against this ongoing DDoS.
  674. o Major bugfixes (congestion control):
  675. - Implement RFC3742 Limited Slow Start. Congestion control was
  676. overshooting the congestion window during slow start, particularly
  677. for onion service activity. With this fix, we now update the
  678. congestion window more often during slow start, as well as dampen
  679. the exponential growth when the congestion window grows above a
  680. capping parameter. This should reduce the memory increases guard
  681. relays were seeing, as well as allow us to set lower queue limits
  682. to defend against ongoing DoS attacks. Fixes bug 40642; bugfix
  683. on 0.4.7.5-alpha.
  684. o Major bugfixes (relay):
  685. - Remove OR connections btrack subsystem entries when the connections
  686. close normally. Before this, we would only remove the entry on error and
  687. thus leaking memory for each normal OR connections. Fixes bug 40604;
  688. bugfix on 0.4.0.1-alpha.
  689. - Stop sending TRUNCATED cell and instead close the circuit from which we
  690. received a DESTROY cell. This makes every relay in the circuit path to
  691. stop queuing cells. Fixes bug 40623; bugfix on 0.1.0.2-rc.
  692. o Major bugfixes (vanguards):
  693. - We had omitted some checks for whether our vanguards (second layer
  694. guards from proposal 333) overlapped. Now make sure to pick each
  695. of them to be independent. Also, change the design to allow them
  696. to come from the same family. Fixes bug 40639; bugfix
  697. on 0.4.7.1-alpha.
  698. o Minor features (dirauth):
  699. - Add a torrc option to control the Guard flag bandwidth threshold
  700. percentile. Closes ticket 40652.
  701. - Add an AuthDirVoteGuard torrc option that can allow authorities to
  702. assign the Guard flag to the given fingerprints/country code/IPs.
  703. This is a needed feature mostly for defense purposes in case a DoS
  704. hits the network and relay start losing the Guard flags too fast.
  705. - Make UPTIME_TO_GUARANTEE_STABLE, MTBF_TO_GUARANTEE_STABLE,
  706. TIME_KNOWN_TO_GUARANTEE_FAMILIAR WFU_TO_GUARANTEE_GUARD tunable
  707. from torrc.
  708. o Minor features (fallbackdir):
  709. - Regenerate fallback directories generated on August 11, 2022.
  710. o Minor features (geoip data):
  711. - Update the geoip files to match the IPFire Location Database, as
  712. retrieved on 2022/08/11.
  713. o Minor bugfixes (congestion control):
  714. - Add a check for an integer underflow condition that might happen
  715. in cases where the system clock is stopped, the ORconn is blocked,
  716. and the endpoint sends more than a congestion window worth of non-
  717. data control cells at once. This would cause a large congestion
  718. window to be calculated instead of a small one. No security
  719. impact. Fixes bug 40644; bugfix on 0.4.7.5-alpha.
  720. o Minor bugfixes (defense in depth):
  721. - Change a test in the netflow padding code to make it more
  722. _obviously_ safe against remotely triggered crashes. (It was safe
  723. against these before, but not obviously so.) Fixes bug 40645;
  724. bugfix on 0.3.1.1-alpha.
  725. o Minor bugfixes (relay):
  726. - Do not propagate either forward or backward a DESTROY remote reason when
  727. closing a circuit in order to avoid a possible side channel. Fixes bug
  728. 40649; bugfix on 0.1.2.4-alpha.
  729. Changes in version 0.4.6.11 - 2022-08-11
  730. This version contains two major fixes aimed at reducing memory pressure on
  731. relays and possible side-channel. The rest of the fixes were backported for
  732. stability or safety purposes.
  733. This is the very LAST version of this series. As of August 1st 2022, it is
  734. end-of-life (EOL). We thus strongly recommend to upgrade to the latest
  735. stable of the 0.4.7.x series.
  736. o Major bugfixes (relay):
  737. - Remove OR connections btrack subsystem entries when the connections
  738. close normally. Before this, we would only remove the entry on error and
  739. thus leaking memory for each normal OR connections. Fixes bug 40604;
  740. bugfix on 0.4.0.1-alpha.
  741. - Stop sending TRUNCATED cell and instead close the circuit from which we
  742. received a DESTROY cell. This makes every relay in the circuit path to
  743. stop queuing cells. Fixes bug 40623; bugfix on 0.1.0.2-rc.
  744. o Minor features (fallbackdir):
  745. - Regenerate fallback directories generated on August 11, 2022.
  746. o Minor features (geoip data):
  747. - Update the geoip files to match the IPFire Location Database, as
  748. retrieved on 2022/08/11.
  749. o Minor features (linux seccomp2 sandbox):
  750. - Permit the clone3 syscall, which is apparently used in glibc-2.34
  751. and later. Closes ticket 40590.
  752. o Minor bugfixes (controller, path bias):
  753. - When a circuit's path is specified, in full or in part, from the
  754. controller API, do not count that circuit towards our path-bias
  755. calculations. (Doing so was incorrect, since we cannot tell
  756. whether the controller is selecting relays randomly.) Resolves a
  757. "Bug" warning. Fixes bug 40515; bugfix on 0.2.4.10-alpha.
  758. o Minor bugfixes (defense in depth):
  759. - Change a test in the netflow padding code to make it more
  760. _obviously_ safe against remotely triggered crashes. (It was safe
  761. against these before, but not obviously so.) Fixes bug 40645;
  762. bugfix on 0.3.1.1-alpha.
  763. o Minor bugfixes (linux seccomp2 sandbox):
  764. - Allow the rseq system call in the sandbox. This solves a crash
  765. issue with glibc 2.35 on Linux. Patch from pmu-ipf. Fixes bug
  766. 40601; bugfix on 0.3.5.11.
  767. o Minor bugfixes (metrics port, onion service):
  768. - The MetricsPort line for an onion service with multiple ports are now
  769. unique that is one line per port. Before this, all ports of an onion
  770. service would be on the same line which violates the Prometheus rules of
  771. unique labels. Fixes bug 40581; bugfix on 0.4.5.1-alpha.
  772. o Minor bugfixes (onion service, client):
  773. - Fix a fatal assert due to a guard subsystem recursion triggered by
  774. the onion service client. Fixes bug 40579; bugfix on 0.3.5.1-alpha.
  775. o Minor bugfixes (performance, DoS):
  776. - Fix one case of a not-especially viable denial-of-service attack
  777. found by OSS-Fuzz in our consensus-diff parsing code. This attack
  778. causes a lot small of memory allocations and then immediately
  779. frees them: this is only slow when running with all the sanitizers
  780. enabled. Fixes one case of bug 40472; bugfix on 0.3.1.1-alpha.
  781. o Minor bugfixes (relay):
  782. - Do not propagate either forward or backward a DESTROY remote reason when
  783. closing a circuit in order to avoid a possible side channel. Fixes bug
  784. 40649; bugfix on 0.1.2.4-alpha.
  785. Changes in version 0.4.5.13 - 2022-08-11
  786. This version contains two major fixes aimed at reducing memory pressure on
  787. relays and possible side-channel. The rest of the fixes were backported for
  788. stability or safety purposes. We strongly recommend to upgrade your relay to
  789. this version or, ideally, to the latest stable of the 0.4.7.x series.
  790. o Major bugfixes (relay):
  791. - Remove OR connections btrack subsystem entries when the connections
  792. close normally. Before this, we would only remove the entry on error and
  793. thus leaking memory for each normal OR connections. Fixes bug 40604;
  794. bugfix on 0.4.0.1-alpha.
  795. - Stop sending TRUNCATED cell and instead close the circuit from which we
  796. received a DESTROY cell. This makes every relay in the circuit path to
  797. stop queuing cells. Fixes bug 40623; bugfix on 0.1.0.2-rc.
  798. o Minor features (fallbackdir):
  799. - Regenerate fallback directories generated on August 11, 2022.
  800. o Minor features (geoip data):
  801. - Update the geoip files to match the IPFire Location Database, as
  802. retrieved on 2022/08/11.
  803. o Minor features (linux seccomp2 sandbox):
  804. - Permit the clone3 syscall, which is apparently used in glibc-2.34
  805. and later. Closes ticket 40590.
  806. o Minor bugfixes (controller, path bias):
  807. - When a circuit's path is specified, in full or in part, from the
  808. controller API, do not count that circuit towards our path-bias
  809. calculations. (Doing so was incorrect, since we cannot tell
  810. whether the controller is selecting relays randomly.) Resolves a
  811. "Bug" warning. Fixes bug 40515; bugfix on 0.2.4.10-alpha.
  812. o Minor bugfixes (defense in depth):
  813. - Change a test in the netflow padding code to make it more
  814. _obviously_ safe against remotely triggered crashes. (It was safe
  815. against these before, but not obviously so.) Fixes bug 40645;
  816. bugfix on 0.3.1.1-alpha.
  817. o Minor bugfixes (linux seccomp2 sandbox):
  818. - Allow the rseq system call in the sandbox. This solves a crash
  819. issue with glibc 2.35 on Linux. Patch from pmu-ipf. Fixes bug
  820. 40601; bugfix on 0.3.5.11.
  821. o Minor bugfixes (metrics port, onion service):
  822. - The MetricsPort line for an onion service with multiple ports are now
  823. unique that is one line per port. Before this, all ports of an onion
  824. service would be on the same line which violates the Prometheus rules of
  825. unique labels. Fixes bug 40581; bugfix on 0.4.5.1-alpha.
  826. o Minor bugfixes (onion service, client):
  827. - Fix a fatal assert due to a guard subsystem recursion triggered by
  828. the onion service client. Fixes bug 40579; bugfix on 0.3.5.1-alpha.
  829. o Minor bugfixes (performance, DoS):
  830. - Fix one case of a not-especially viable denial-of-service attack
  831. found by OSS-Fuzz in our consensus-diff parsing code. This attack
  832. causes a lot small of memory allocations and then immediately
  833. frees them: this is only slow when running with all the sanitizers
  834. enabled. Fixes one case of bug 40472; bugfix on 0.3.1.1-alpha.
  835. o Minor bugfixes (relay):
  836. - Do not propagate either forward or backward a DESTROY remote reason when
  837. closing a circuit in order to avoid a possible side channel. Fixes bug
  838. 40649; bugfix on 0.1.2.4-alpha.
  839. Changes in version 0.4.7.8 - 2022-06-17
  840. This version fixes several bugfixes including a High severity security issue
  841. categorized as a Denial of Service. Everyone running an earlier version
  842. should upgrade to this version.
  843. o Major bugfixes (congestion control, TROVE-2022-001):
  844. - Fix a scenario where RTT estimation can become wedged, seriously
  845. degrading congestion control performance on all circuits. This
  846. impacts clients, onion services, and relays, and can be triggered
  847. remotely by a malicious endpoint. Tracked as CVE-2022-33903. Fixes
  848. bug 40626; bugfix on 0.4.7.5-alpha.
  849. o Minor features (fallbackdir):
  850. - Regenerate fallback directories generated on June 17, 2022.
  851. o Minor features (geoip data):
  852. - Update the geoip files to match the IPFire Location Database, as
  853. retrieved on 2022/06/17.
  854. o Minor bugfixes (linux seccomp2 sandbox):
  855. - Allow the rseq system call in the sandbox. This solves a crash
  856. issue with glibc 2.35 on Linux. Patch from pmu-ipf. Fixes bug
  857. 40601; bugfix on 0.3.5.11.
  858. o Minor bugfixes (logging):
  859. - Demote a harmless warn log message about finding a second hop to
  860. from warn level to info level, if we do not have enough
  861. descriptors yet. Leave it at notice level for other cases. Fixes
  862. bug 40603; bugfix on 0.4.7.1-alpha.
  863. - Demote a notice log message about "Unexpected path length" to info
  864. level. These cases seem to happen arbitrarily, and we likely will
  865. never find all of them before the switch to arti. Fixes bug 40612;
  866. bugfix on 0.4.7.5-alpha.
  867. o Minor bugfixes (relay, logging):
  868. - Demote a harmless XOFF log message to from notice level to info
  869. level. Fixes bug 40620; bugfix on 0.4.7.5-alpha.
  870. Changes in version 0.4.7.7 - 2022-04-27
  871. This is the first stable version of the 0.4.7.x series. This series includes
  872. several major bugfixes from previous series and one massive new feature:
  873. congestion control.
  874. Congestion control should improve traffic speed and stability on the network
  875. once a majority of Exit upgrade. You can find more details about it in
  876. proposal 324 in the torspec.git repository.
  877. For a complete list of changes since 0.4.6.10, see the ReleaseNotes file.
  878. o Minor features (fallbackdir):
  879. - Regenerate fallback directories generated on April 27, 2022.
  880. o Minor features (geoip data):
  881. - Update the geoip files to match the IPFire Location Database, as
  882. retrieved on 2022/04/27.
  883. o Minor bugfixes (congestion control, client side logs):
  884. - Demote a warn about 1-hop circuits using congestion control down to
  885. info; Demote the 4-hop case to notice. Fixes bug 40598; bugfix on
  886. 0.4.5-alpha.
  887. Changes in version 0.4.7.6-rc - 2022-04-07
  888. This is the first release candidate of the 0.4.7.x series. Only one minor
  889. bugfix went in since the last alpha couple weeks ago. We strongly recommend
  890. anyone running an alpha version to upgrade to this version. Unless major
  891. problems are found, the next release will finally be the stable!
  892. o Minor features (fallbackdir):
  893. - Regenerate fallback directories generated on April 07, 2022.
  894. o Minor features (geoip data):
  895. - Update the geoip files to match the IPFire Location Database, as
  896. retrieved on 2022/04/07.
  897. o Minor features (linux seccomp2 sandbox):
  898. - Permit the clone3 syscall, which is apparently used in glibc-2.34
  899. and later. Closes ticket 40590.
  900. Changes in version 0.4.7.5-alpha - 2022-03-25
  901. This version contains, of what we hope, the final work for congestion
  902. control paving the way to the stable version. We expect this to be the last
  903. alpha version of the 0.4.7.x series. Mostly minor bugfixes except one major
  904. bugfix that changes how Tor behaves with DNS timeouts for Exit relays. As
  905. always with an alpha, we recommend all relay operators to upgrade from
  906. previous alpha to this one.
  907. o Major bugfixes (onion service, congestion control):
  908. - Fix the onion service upload case where the congestion control
  909. parameters were not added to the right object. Fixes bug 40586;
  910. bugfix on 0.4.7.4-alpha.
  911. o Major bugfixes (relay, DNS):
  912. - Lower the DNS timeout from 3 attempts at 5 seconds each to 2
  913. attempts at 1 seconds each. Two new consensus parameters were
  914. added to control these values. This change should improve observed
  915. performance under DNS load; see ticket for more details. Fixes bug
  916. 40312; bugfix on 0.3.5.1-alpha.
  917. o Minor features (control port):
  918. - Provide congestion control fields on CIRC_BW and STREAM control
  919. port events, for use by sbws. Closes ticket 40568.
  920. o Minor features (fallbackdir):
  921. - Regenerate fallback directories generated on March 25, 2022.
  922. o Minor features (geoip data):
  923. - Update the geoip files to match the IPFire Location Database, as
  924. retrieved on 2022/03/25.
  925. o Minor bugfixes (DNSPort, dormant mode):
  926. - A request on the DNSPort now wakes up a dormant tor. Fixes bug
  927. 40577; bugfix on 0.3.5.1-alpha.
  928. o Minor bugfixes (metrics port, onion service):
  929. - Fix the metrics with a port label to be unique. Before this, all
  930. ports of an onion service would be on the same line which violates
  931. the Prometheus rules of unique labels. Fixes bug 40581; bugfix
  932. on 0.4.5.1-alpha.
  933. o Minor bugfixes (onion service congestion control):
  934. - Avoid a non-fatal assertion failure in the case where we fail to
  935. set up congestion control on a rendezvous circuit. This could
  936. happen naturally if a cache entry expired at an unexpected time.
  937. Fixes bug 40576; bugfix on 0.4.7.4-alpha.
  938. o Minor bugfixes (onion service, client):
  939. - Fix a rare but fatal assertion failure due to a guard subsystem
  940. recursion triggered by the onion service client. Fixes bug 40579;
  941. bugfix on 0.3.5.1-alpha.
  942. o Minor bugfixes (relay, overload):
  943. - Decide whether to signal overload based on a fraction and
  944. assessment period of ntor handshake drops. Previously, a single
  945. drop could trigger an overload state, which caused many false
  946. positives. Fixes bug 40560; bugfix on 0.4.7.1-alpha.
  947. Changes in version 0.4.7.4-alpha - 2022-02-25
  948. This version contains the negotiation congestion control work which is the
  949. final part needed before going stable. There are also various bugfixes
  950. including two major ones detailed below. Last, the Exit notice page layout
  951. has been modernized but the text is unchanged. We recommend that all relay
  952. operators running any previous alpha upgrade to this one.
  953. o Major features (relay, client, onion services):
  954. - Implement RTT-based congestion control for exits and onion
  955. services, from Proposal 324. Disabled by default. Enabled by the
  956. 'cc_alg' consensus parameter. Closes ticket 40444.
  957. o Major bugfixes (client):
  958. - Stop caching TCP connect failures to relays/bridges when we
  959. initiated the connection as a client. Now we only cache connect
  960. failures as a relay or bridge when we initiated them because of an
  961. EXTEND request. Declining to re-attempt the client-based
  962. connections could cause problems when we lose connectivity and try
  963. to reconnect. Fixes bug 40499; bugfix on 0.3.3.4-alpha.
  964. o Major bugfixes (relay, overload):
  965. - Do not trigger a general overload on DNS timeout. Even after
  966. fixing 40527, some code remained that triggered the overload.
  967. Fixes bug 40564; bugfix on 0.4.7.1-alpha.
  968. o Minor feature (authority, relay):
  969. - Reject End-Of-Life relays running version 0.3.5.x. Closes
  970. ticket 40559.
  971. o Minor features (fallbackdir):
  972. - Regenerate fallback directories generated on February 25, 2022.
  973. o Minor features (geoip data):
  974. - Update the geoip files to match the IPFire Location Database, as
  975. retrieved on 2022/02/25.
  976. o Minor bugfix (logging):
  977. - Update a log notice dead URL to a working one. Fixes bug 40544;
  978. bugfix on 0.3.5.1-alpha.
  979. o Minor bugfix (relay):
  980. - Remove the HSDir and HSIntro onion service v2 protocol versions so
  981. relay stop advertising that they support them. Fixes bug 40509;
  982. bugfix on 0.3.5.17.
  983. o Minor bugfixes (cell scheduling):
  984. - Avoid writing empty payload with NSS write.
  985. - Don't attempt to write 0 bytes after a cell scheduling loop. No
  986. empty payload was put on the wire. Fixes bug 40548; bugfix
  987. on 0.3.5.1-alpha.
  988. o Minor bugfixes (compilation):
  989. - Resume being able to build on old / esoteric gcc versions. Fixes
  990. bug 40550; bugfix on 0.4.7.1-alpha.
  991. o Minor bugfixes (compiler warnings):
  992. - Fix couple compiler warnings on latest Ubuntu Jammy. Fixes bug
  993. 40516; bugfix on 0.3.5.1-alpha.
  994. o Documentation:
  995. - Provide an improved version of the tor-exit-notice.html file for
  996. exit relays to use as a landing page. The text is unchanged, but
  997. the page design and layout are significantly modernized, and
  998. several links are fixed. Patch from "n_user"; closes ticket 40529.
  999. Changes in version 0.4.6.10 - 2022-02-04
  1000. This version contains minor bugfixes but one in particular is that relays
  1001. don't advertise onion service v2 support at the protocol version level.
  1002. o Minor features (fallbackdir):
  1003. - Regenerate fallback directories generated on February 04, 2022.
  1004. o Minor features (geoip data):
  1005. - Update the geoip files to match the IPFire Location Database, as
  1006. retrieved on 2022/02/04.
  1007. o Minor bugfix (logging):
  1008. - Update a log notice dead URL to a working one. Fixes bug 40544;
  1009. bugfix on 0.3.5.1-alpha.
  1010. o Minor bugfix (relay):
  1011. - Remove the HSDir and HSIntro onion service v2 protocol versions so
  1012. relay stop advertising that they support them. Fixes bug 40509;
  1013. bugfix on 0.3.5.17.
  1014. o Minor bugfixes (MetricsPort, Prometheus):
  1015. - Add double quotes to the label values of the onion service
  1016. metrics. Fixes bug 40552; bugfix on 0.4.5.1-alpha.
  1017. Changes in version 0.4.5.12 - 2022-02-04
  1018. This version contains mostly minor bugfixes for which you can find the
  1019. details below. The previous release (0.4.5.11) was suppose to update the
  1020. GeoIP and fallbackdir lists but a problem in our release pipeline prevented
  1021. those files to be updated correctly. Thus, this release regenerates up to
  1022. date lists. Furthermore, another fix to highlight is that relays don't
  1023. advertise onion service v2 support at the protocol version level.
  1024. o Minor feature (reproducible build):
  1025. - The repository can now build reproducible tarballs which adds the
  1026. build command "make dist-reprod" for that purpose. Closes
  1027. ticket 26299.
  1028. o Minor features (compilation):
  1029. - Give an error message if trying to build with a version of
  1030. LibreSSL known not to work with Tor. (There's an incompatibility
  1031. with LibreSSL versions 3.2.1 through 3.4.0 inclusive because of
  1032. their incompatibility with OpenSSL 1.1.1's TLSv1.3 APIs.) Closes
  1033. ticket 40511.
  1034. o Minor features (fallbackdir):
  1035. - Regenerate fallback directories generated on February 04, 2022.
  1036. o Minor features (geoip data):
  1037. - Update the geoip files to match the IPFire Location Database, as
  1038. retrieved on 2022/02/04.
  1039. o Minor bugfix (logging):
  1040. - Update a log notice dead URL to a working one. Fixes bug 40544;
  1041. bugfix on 0.3.5.1-alpha.
  1042. o Minor bugfix (relay):
  1043. - Remove the HSDir and HSIntro onion service v2 protocol versions so
  1044. relay stop advertising that they support them. Fixes bug 40509;
  1045. bugfix on 0.3.5.17.
  1046. o Minor bugfixes (compilation):
  1047. - Fix a compilation error when trying to build Tor with a compiler
  1048. that does not support expanding statically initialized const
  1049. values in macro's. Fixes bug 40410; bugfix on 0.4.5.1-alpha
  1050. - Fix our configuration logic to detect whether we had OpenSSL 3:
  1051. previously, our logic was reversed. This has no other effect than
  1052. to change whether we suppress deprecated API warnings. Fixes bug
  1053. 40429; bugfix on 0.3.5.13.
  1054. o Minor bugfixes (MetricsPort, Prometheus):
  1055. - Add double quotes to the label values of the onion service
  1056. metrics. Fixes bug 40552; bugfix on 0.4.5.1-alpha.
  1057. o Minor bugfixes (relay):
  1058. - Reject IPv6-only DirPorts. Our reachability self-test forces
  1059. DirPorts to be IPv4, but our configuration parser allowed them to
  1060. be IPv6-only, which led to an assertion failure. Fixes bug 40494;
  1061. bugfix on 0.4.5.1-alpha.
  1062. Changes in version 0.4.7.3-alpha - 2021-12-15
  1063. This third alpha release of the 0.4.7.x series fixes several bugs including
  1064. two major ones affecting Bridges and Relays (see below). If you are running
  1065. an earlier 0.4.7.x version, you should upgrade to this version.
  1066. o Major bugfixes (bridges):
  1067. - Make Tor work reliably again when you have multiple bridges
  1068. configured and one or more of them are unreachable. The problem
  1069. came because we require that we have bridge descriptors for both
  1070. of our first two bridges (else we refuse to try to connect), but
  1071. in some cases we would wait three hours before trying to fetch
  1072. these missing descriptors, and/or never recover when we do try to
  1073. fetch them. Fixes bugs 40396 and 40495; bugfix on 0.3.0.5-rc
  1074. and 0.3.2.1-alpha.
  1075. o Major bugfixes (relay, overload):
  1076. - Change the MetricsPort DNS "timeout" label to be "tor_timeout" in
  1077. order to indicate that this was a DNS timeout from tor perspective
  1078. and not the DNS server itself.
  1079. - Deprecate overload_dns_timeout_period_secs and
  1080. overload_dns_timeout_scale_percent consensus parameters as well.
  1081. They were used to assess the overload state which is no more now.
  1082. - Don't make Tor DNS timeout trigger an overload general state.
  1083. These timeouts are different from DNS server timeout. They have to
  1084. be seen as timeout related to UX and not because of a network
  1085. problem. Fixes bug 40527; bugfix on 0.4.6.1-alpha.
  1086. o Minor feature (reproducible build):
  1087. - The repository can now build reproducible tarballs which adds the
  1088. build command "make dist-reprod" for that purpose. Closes
  1089. ticket 26299.
  1090. o Minor features (compilation):
  1091. - Give an error message if trying to build with a version of
  1092. LibreSSL known not to work with Tor. (There's an incompatibility
  1093. with LibreSSL versions 3.2.1 through 3.4.0 inclusive because of
  1094. their incompatibility with OpenSSL 1.1.1's TLSv1.3 APIs.) Closes
  1095. ticket 40511.
  1096. o Minor features (fallbackdir):
  1097. - Regenerate fallback directories generated on December 15, 2021.
  1098. o Minor features (geoip data):
  1099. - Update the geoip files to match the IPFire Location Database, as
  1100. retrieved on 2021/12/15.
  1101. o Minor features (portability):
  1102. - Try to prevent a compiler warning about printf arguments that
  1103. could sometimes occur on MSYS2 depending on the configuration.
  1104. Closes ticket 40355.
  1105. o Minor bugfix (pluggable transport):
  1106. - Do not kill a managed proxy if one of its transport configurations
  1107. emits a method error. Instead log a warning and continue processing
  1108. method arguments. Fixes bug 7362; bugfix on 0.2.3.6-alpha.
  1109. o Minor bugfixes (bridges):
  1110. - When we don't yet have a descriptor for one of our bridges,
  1111. disable the entry guard retry schedule on that bridge. The entry
  1112. guard retry schedule and the bridge descriptor retry schedule can
  1113. conflict, e.g. where we mark a bridge as "maybe up" yet we don't
  1114. try to fetch its descriptor yet, leading Tor to wait (refusing to
  1115. do anything) until it becomes time to fetch the descriptor. Fixes
  1116. bug 40497; bugfix on 0.3.0.3-alpha.
  1117. o Minor bugfixes (compilation):
  1118. - Fix our configuration logic to detect whether we had OpenSSL 3:
  1119. previously, our logic was reversed. This has no other effect than
  1120. to change whether we suppress deprecated API warnings. Fixes bug
  1121. 40429; bugfix on 0.3.5.13.
  1122. o Minor bugfixes (controller, path bias):
  1123. - When a circuit's path is specified, in full or in part, from the
  1124. controller API, do not count that circuit towards our path-bias
  1125. calculations. (Doing so was incorrect, since we cannot tell
  1126. whether the controller is selecting relays randomly.) Resolves a
  1127. "Bug" warning. Fixes bug 40515; bugfix on 0.2.4.10-alpha.
  1128. o Minor bugfixes (logging):
  1129. - When we no longer have enough directory information to use the
  1130. network, we would log a notice-level message -- but we would not
  1131. reliably log a message when we recovered and resumed using the
  1132. network. Now make sure there is always a corresponding message
  1133. about recovering. Fixes bug 40496; bugfix on 0.3.5.1-alpha.
  1134. o Minor bugfixes (performance, DoS):
  1135. - Fix one case of a not-especially viable denial-of-service attack
  1136. found by OSS-Fuzz in our consensus-diff parsing code. This attack
  1137. causes a lot small of memory allocations and then immediately
  1138. frees them: this is only slow when running with all the sanitizers
  1139. enabled. Fixes one case of bug 40472; bugfix on 0.3.1.1-alpha.
  1140. o Minor bugfixes (relay):
  1141. - Reject IPv6-only DirPorts. Our reachability self-test forces
  1142. DirPorts to be IPv4, but our configuration parser allowed them to
  1143. be IPv6-only, which led to an assertion failure. Fixes bug 40494;
  1144. bugfix on 0.4.5.1-alpha.
  1145. o Minor bugfixes (sandbox):
  1146. - Fix the sandbox on i386 by modifying it to allow the
  1147. "clock_gettime64" and "statx" system calls and to filter the
  1148. "chown32" and "stat64" system calls in place of "chown" and
  1149. "stat", respectively. Fixes bug 40505; bugfix on 0.2.5.4-alpha.
  1150. o Documentation (man, relay):
  1151. - Missing "OverloadStatistics" in tor.1 manpage. Fixes bug 40504;
  1152. bugfix on 0.4.6.1-alpha.
  1153. Changes in version 0.4.6.9 - 2021-12-15
  1154. This version fixes several bugs from earlier versions of Tor. One important
  1155. piece is the removal of DNS timeout metric from the overload general signal.
  1156. See below for more details.
  1157. o Major bugfixes (relay, overload):
  1158. - Don't make Tor DNS timeout trigger an overload general state.
  1159. These timeouts are different from DNS server timeout. They have to
  1160. be seen as timeout related to UX and not because of a network
  1161. problem. Fixes bug 40527; bugfix on 0.4.6.1-alpha.
  1162. o Minor feature (reproducible build):
  1163. - The repository can now build reproducible tarballs which adds the
  1164. build command "make dist-reprod" for that purpose. Closes
  1165. ticket 26299.
  1166. o Minor features (compilation):
  1167. - Give an error message if trying to build with a version of
  1168. LibreSSL known not to work with Tor. (There's an incompatibility
  1169. with LibreSSL versions 3.2.1 through 3.4.0 inclusive because of
  1170. their incompatibility with OpenSSL 1.1.1's TLSv1.3 APIs.) Closes
  1171. ticket 40511.
  1172. o Minor features (fallbackdir):
  1173. - Regenerate fallback directories generated on December 15, 2021.
  1174. o Minor features (geoip data):
  1175. - Update the geoip files to match the IPFire Location Database, as
  1176. retrieved on 2021/12/15.
  1177. o Minor bugfixes (compilation):
  1178. - Fix our configuration logic to detect whether we had OpenSSL 3:
  1179. previously, our logic was reversed. This has no other effect than
  1180. to change whether we suppress deprecated API warnings. Fixes bug
  1181. 40429; bugfix on 0.3.5.13.
  1182. o Minor bugfixes (relay):
  1183. - Reject IPv6-only DirPorts. Our reachability self-test forces
  1184. DirPorts to be IPv4, but our configuration parser allowed them to
  1185. be IPv6-only, which led to an assertion failure. Fixes bug 40494;
  1186. bugfix on 0.4.5.1-alpha.
  1187. o Documentation (man, relay):
  1188. - Missing "OverloadStatistics" in tor.1 manpage. Fixes bug 40504;
  1189. bugfix on 0.4.6.1-alpha.
  1190. Changes in version 0.4.7.2-alpha - 2021-10-26
  1191. This second alpha release of the 0.4.7.x series adds two major
  1192. features: congestion control (prop324) for network performance, and
  1193. the MiddleOnly flag (prop335) voted by the authorities to pin relays
  1194. to the middle position for various network health reasons. This
  1195. release also fixes numerous bugs.
  1196. The congestion control feature, detailed in proposal 324, still needs
  1197. more work before we can enable it by default. It is currently in its
  1198. testing and tuning phase which means that you should expect more
  1199. 0.4.7.x alphas as congestion control gets stabilized and tuned for
  1200. optimal performance. And so, at this release, it can not be used
  1201. without a custom patch.
  1202. o Major features (congestion control):
  1203. - Implement support for flow control over congestion controlled
  1204. circuits. This work comes from proposal 324. Closes ticket 40450.
  1205. o Major features (directory authority):
  1206. - Add a new consensus method to handle MiddleOnly specially. When
  1207. enough authorities are using this method, then any relay tagged
  1208. with the MiddleOnly flag will have its Exit, Guard, HSDir, and
  1209. V2Dir flags automatically cleared, and will have its BadExit flag
  1210. automatically set. Implements part of proposal 335.
  1211. - Authorities can now be configured to label relays as "MiddleOnly".
  1212. When voting for this flag, authorities automatically vote against
  1213. Exit, Guard, HSDir, and V2Dir; and in favor of BadExit. Implements
  1214. part of proposal 335. Based on a patch from Neel Chauhan.
  1215. o Major bugfix (relay, metrics):
  1216. - On the MetricsPort, the DNS error statistics are not reported by
  1217. record type ("record=...") anymore due to a libevent bug
  1218. (https://github.com/libevent/libevent/issues/1219). Fixes bug
  1219. 40490; bugfix on 0.4.7.1-alpha.
  1220. o Major bugfixes (relay, overload state):
  1221. - Relays report the general overload state for DNS timeout errors
  1222. only if X% of all DNS queries over Y seconds are errors. Before
  1223. that, it only took 1 timeout to report the overload state which
  1224. was just too low of a threshold. The X and Y values are 1% and 10
  1225. minutes respectively but they are also controlled by consensus
  1226. parameters. Fixes bug 40491; bugfix on 0.4.6.1-alpha.
  1227. o Minor feature (authority, relay):
  1228. - Reject End-Of-Life relays running version 0.4.2.x, 0.4.3.x,
  1229. 0.4.4.x and 0.4.5 alphas/rc. Closes ticket 40480.
  1230. o Minor feature (onion service v2):
  1231. - Onion service v2 addresses are now not recognized anymore by tor
  1232. meaning a bad hostname is returned when attempting to pass it on a
  1233. SOCKS connection. No more deprecation log is emitted client side.
  1234. Closes ticket 40476.
  1235. - See https://blog.torproject.org/v2-deprecation-timeline for
  1236. details on how to transition from v2 to v3.
  1237. o Minor features (fallbackdir):
  1238. - Regenerate fallback directories for October 2021. Closes
  1239. ticket 40493.
  1240. o Minor features (logging, heartbeat):
  1241. - When a relay receives a cell that isn't encrypted properly for it,
  1242. but the relay is the last hop on the circuit, the relay now counts
  1243. how many cells of this kind it receives, on how many circuits, and
  1244. reports this information in the log. Previously, we'd log each
  1245. cell at PROTOCOL_WARN level, which is far too verbose to be
  1246. useful. Fixes part of ticket 40400.
  1247. o Minor features (testing):
  1248. - We now have separate fuzzers for the inner layers of v3 onion
  1249. service descriptors, to prevent future bugs like 40392. Closes
  1250. ticket 40488.
  1251. o Minor bugfixes (compilation):
  1252. - Fix compilation error when __NR_time is not defined. Fixes bug
  1253. 40465; bugfix on 0.2.5.5-alpha. Patch by Daniel Pinto.
  1254. o Minor bugfixes (dirauth, bandwidth scanner):
  1255. - Add the AuthDirDontVoteOnDirAuthBandwidth dirauth config parameter
  1256. to avoid voting on bandwidth scanner weights to v3 directory
  1257. authorities. Fixes bug 40471; bugfix on 0.2.2.1-alpha. Patch by
  1258. Neel Chauhan.
  1259. o Minor bugfixes (fragile-hardening, sandbox):
  1260. - When building with --enable-fragile-hardening, add or relax Linux
  1261. seccomp rules to allow AddressSanitizer to execute normally if the
  1262. process terminates with the sandbox active. This has the side
  1263. effect of disabling the filtering of file- and directory-open
  1264. requests on most systems and dilutes the effectiveness of the
  1265. sandbox overall, as a wider range of system calls must be
  1266. permitted. Fixes bug 11477; bugfix on 0.2.5.4-alpha.
  1267. o Minor bugfixes (logging):
  1268. - If a channel has never received or transmitted a cell, or seen a
  1269. client, do not calculate time diffs against 1/1/1970 but log a
  1270. better prettier message. Fixes bug 40182; bugfix on 0.2.4.4.
  1271. o Minor bugfixes (onion service):
  1272. - Fix a warning BUG that would occur often on heavily loaded onion
  1273. service leading to filling the logs with useless warnings. Fixes
  1274. bug 34083; bugfix on 0.3.2.1-alpha.
  1275. o Minor bugfix (CI, onion service):
  1276. - Exclude onion service version 2 Stem tests in our CI. Fixes bug 40500;
  1277. bugfix on 0.3.2.1-alpha.
  1278. o Minor bugfixes (onion service, config):
  1279. - Fix a memory leak for a small config line string that could occur
  1280. if the onion service failed to be configured from file properly.
  1281. Fixes bug 40484; bugfix on 0.3.2.1-alpha.
  1282. o Minor bugfixes (onion service, TROVE-2021-008):
  1283. - Only log v2 access attempts once total, in order to not pollute
  1284. the logs with warnings and to avoid recording the times on disk
  1285. when v2 access was attempted. Note that the onion address was
  1286. _never_ logged. This counts as a Low-severity security issue.
  1287. Fixes bug 40474; bugfix on 0.4.5.8.
  1288. - Note that due to #40476 which removes v2 support entirely, this
  1289. log line is not emitted anymore. We still mention this in the
  1290. changelog because it is a Low-severity TROVE.
  1291. o Minor bugfixes (usability):
  1292. - Do not log "RENDEZVOUS1 cell with unrecognized rendezvous cookie"
  1293. at LOG_PROTOCOL_WARN; instead log it at DEBUG. This warning can
  1294. happen naturally if a client gives up on a rendezvous circuit
  1295. after sending INTRODUCE1. Fixes part of bug 40400; bugfix
  1296. on 0.1.1.13-alpha.
  1297. - Do not log "circuit_receive_relay_cell failed" at
  1298. LOG_PROTOCOL_WARN; instead log it at DEBUG. In every case where we
  1299. would want to log this as a protocol warning, we are already
  1300. logging another warning from inside circuit_receive_relay_cell.
  1301. Fixes part of bug 40400; bugfix on 0.1.1.9-alpha.
  1302. o Code simplification and refactoring:
  1303. - Lower the official maximum for "guard-extreme-restriction-percent"
  1304. to 100. This has no effect on when the guard code will generate a
  1305. warning, but it makes the intent of the option clearer. Fixes bug
  1306. 40486; bugfix on 0.3.0.1-alpha.
  1307. o Testing:
  1308. - Add unit tests for the Linux seccomp sandbox. Resolves
  1309. issue 16803.
  1310. o Code simplification and refactoring (rust):
  1311. - Remove Rust support and its associated code. It is unsupported and
  1312. Rust focus should be shifted to arti. Closes ticket 40469.
  1313. o Testing (CI, chutney):
  1314. - Bump the data size that chutney transmits to 5MBytes in order to
  1315. trigger the flow control and congestion window code. Closes
  1316. ticket 40485.
  1317. Changes in version 0.4.6.8 - 2021-10-26
  1318. This version fixes several bugs from earlier versions of Tor. One
  1319. highlight is a fix on how we track DNS timeouts to report general
  1320. relay overload.
  1321. o Major bugfixes (relay, overload state):
  1322. - Relays report the general overload state for DNS timeout errors
  1323. only if X% of all DNS queries over Y seconds are errors. Before
  1324. that, it only took 1 timeout to report the overload state which
  1325. was just too low of a threshold. The X and Y values are 1% and 10
  1326. minutes respectively but they are also controlled by consensus
  1327. parameters. Fixes bug 40491; bugfix on 0.4.6.1-alpha.
  1328. o Minor features (fallbackdir):
  1329. - Regenerate fallback directories for October 2021. Closes
  1330. ticket 40493.
  1331. o Minor features (testing):
  1332. - On a testing network, relays can now use the
  1333. TestingMinTimeToReportBandwidth option to change the smallest
  1334. amount of time over which they're willing to report their observed
  1335. maximum bandwidth. Previously, this was fixed at 1 day. For
  1336. safety, values under 2 hours are only supported on testing
  1337. networks. Part of a fix for ticket 40337.
  1338. - Relays on testing networks no longer rate-limit how frequently
  1339. they are willing to report new bandwidth measurements. Part of a
  1340. fix for ticket 40337.
  1341. - Relays on testing networks now report their observed bandwidths
  1342. immediately from startup. Previously, they waited until they had
  1343. been running for a full day. Closes ticket 40337.
  1344. o Minor bugfix (onion service):
  1345. - Do not flag an HSDir as non-running in case the descriptor upload
  1346. or fetch fails. An onion service closes pending directory
  1347. connections before uploading a new descriptor which can thus lead
  1348. to wrongly flagging many relays and thus affecting circuit building
  1349. path selection. Fixes bug 40434; bugfix on 0.2.0.13-alpha.
  1350. - Improve logging when a bad HS version is given. Fixes bug 40476;
  1351. bugfix on 0.4.6.1-alpha.
  1352. o Minor bugfix (CI, onion service):
  1353. - Exclude onion service version 2 Stem tests in our CI. Fixes bug 40500;
  1354. bugfix on 0.3.2.1-alpha.
  1355. o Minor bugfixes (compatibility):
  1356. - Fix compatibility with the most recent Libevent versions, which no
  1357. longer have an evdns_set_random_bytes() function. Because this
  1358. function has been a no-op since Libevent 2.0.4-alpha, it is safe
  1359. for us to just stop calling it. Fixes bug 40371; bugfix
  1360. on 0.2.1.7-alpha.
  1361. o Minor bugfixes (onion service, TROVE-2021-008):
  1362. - Only log v2 access attempts once total, in order to not pollute
  1363. the logs with warnings and to avoid recording the times on disk
  1364. when v2 access was attempted. Note that the onion address was
  1365. _never_ logged. This counts as a Low-severity security issue.
  1366. Fixes bug 40474; bugfix on 0.4.5.8.
  1367. Changes in version 0.4.5.11 - 2021-10-26
  1368. The major change in this version is that v2 onion services are now
  1369. disabled at the client, service, and relay: any Tor nodes running this
  1370. version and onward will stop supporting v2 onion services. This is the
  1371. last step in the long deprecation process of v2 onion services.
  1372. Everyone running an earlier version, whether as a client, a relay, or
  1373. an onion service, should upgrade to Tor 0.3.5.17, 0.4.5.11,
  1374. or 0.4.6.8.
  1375. o Major feature (onion service v2):
  1376. - See https://blog.torproject.org/v2-deprecation-timeline for
  1377. details on how to transition from v2 to v3.
  1378. - The control port commands HSFETCH and HSPOST no longer allow
  1379. version 2, and it is no longer possible to create a v2 service
  1380. with ADD_ONION.
  1381. - Tor no longer allows creating v2 services, or connecting as a
  1382. client to a v2 service. Relays will decline to be a v2 HSDir or
  1383. introduction point. This effectively disables onion service
  1384. version 2 Tor-wide. Closes ticket 40476.
  1385. o Minor features (bridge, backport from 0.4.6.8):
  1386. - We now announce the URL to Tor's new bridge status at
  1387. https://bridges.torproject.org/ when Tor is configured to run as a
  1388. bridge relay. Closes ticket 30477.
  1389. o Minor features (fallbackdir):
  1390. - Regenerate fallback directories for October 2021. Closes
  1391. ticket 40493.
  1392. o Minor features (logging, diagnostic, backport from 0.4.6.5):
  1393. - Log decompression failures at a higher severity level, since they
  1394. can help provide missing context for other warning messages. We
  1395. rate-limit these messages, to avoid flooding the logs if they
  1396. begin to occur frequently. Closes ticket 40175.
  1397. o Minor features (testing, backport from 0.4.6.8):
  1398. - On a testing network, relays can now use the
  1399. TestingMinTimeToReportBandwidth option to change the smallest
  1400. amount of time over which they're willing to report their observed
  1401. maximum bandwidth. Previously, this was fixed at 1 day. For
  1402. safety, values under 2 hours are only supported on testing
  1403. networks. Part of a fix for ticket 40337.
  1404. - Relays on testing networks no longer rate-limit how frequently
  1405. they are willing to report new bandwidth measurements. Part of a
  1406. fix for ticket 40337.
  1407. - Relays on testing networks now report their observed bandwidths
  1408. immediately from startup. Previously, they waited until they had
  1409. been running for a full day. Closes ticket 40337.
  1410. o Minor bugfix (CI, onion service):
  1411. - Exclude onion service version 2 Stem tests in our CI. Fixes bug 40500;
  1412. bugfix on 0.3.2.1-alpha.
  1413. o Minor bugfix (onion service, backport from 0.4.6.8):
  1414. - Do not flag an HSDir as non-running in case the descriptor upload
  1415. or fetch fails. An onion service closes pending directory
  1416. connections before uploading a new descriptor which can thus lead
  1417. to wrongly flagging many relays and thus affecting circuit building
  1418. path selection. Fixes bug 40434; bugfix on 0.2.0.13-alpha.
  1419. o Minor bugfixes (compatibility, backport from 0.4.6.8):
  1420. - Fix compatibility with the most recent Libevent versions, which no
  1421. longer have an evdns_set_random_bytes() function. Because this
  1422. function has been a no-op since Libevent 2.0.4-alpha, it is safe
  1423. for us to just stop calling it. Fixes bug 40371; bugfix
  1424. on 0.2.1.7-alpha.
  1425. o Minor bugfixes (consensus handling, backport from 0.4.6.4-rc):
  1426. - Avoid a set of bugs that could be caused by inconsistently
  1427. preferring an out-of-date consensus stored in a stale directory
  1428. cache over a more recent one stored on disk as the latest
  1429. consensus. Fixes bug 40375; bugfix on 0.3.1.1-alpha.
  1430. o Minor bugfixes (onion service, TROVE-2021-008, backport from 0.4.6.8):
  1431. - Only log v2 access attempts once total, in order to not pollute
  1432. the logs with warnings and to avoid recording the times on disk
  1433. when v2 access was attempted. Note that the onion address was
  1434. _never_ logged. This counts as a Low-severity security issue.
  1435. Fixes bug 40474; bugfix on 0.4.5.8.
  1436. Changes in version 0.3.5.17 - 2021-10-26
  1437. The major change in this version is that v2 onion services are now
  1438. disabled at the client, service, and relay: any Tor nodes running this
  1439. version and onward will stop supporting v2 onion services. This is the
  1440. last step in the long deprecation process of v2 onion services.
  1441. Everyone running an earlier version, whether as a client, a relay, or
  1442. an onion service, should upgrade to Tor 0.3.5.17, 0.4.5.11,
  1443. or 0.4.6.8.
  1444. o Major feature (onion service v2, backport from 0.4.5.11):
  1445. - See https://blog.torproject.org/v2-deprecation-timeline for
  1446. details on how to transition from v2 to v3.
  1447. - The control port commands HSFETCH and HSPOST no longer allow
  1448. version 2, and it is no longer possible to create a v2 service
  1449. with ADD_ONION.
  1450. - Tor no longer allows creating v2 services, or connecting as a
  1451. client to a v2 service. Relays will decline to be a v2 HSDir or
  1452. introduction point. This effectively disables onion service
  1453. version 2 Tor-wide. Closes ticket 40476.
  1454. o Minor features (bridge, backport from 0.4.6.8):
  1455. - We now announce the URL to Tor's new bridge status at
  1456. https://bridges.torproject.org/ when Tor is configured to run as a
  1457. bridge relay. Closes ticket 30477.
  1458. o Minor features (fallbackdir):
  1459. - Regenerate fallback directories for October 2021. Closes
  1460. ticket 40493.
  1461. o Minor bugfixes (compatibility, backport from 0.4.6.8):
  1462. - Fix compatibility with the most recent Libevent versions, which no
  1463. longer have an evdns_set_random_bytes() function. Because this
  1464. function has been a no-op since Libevent 2.0.4-alpha, it is safe
  1465. for us to just stop calling it. Fixes bug 40371; bugfix
  1466. on 0.2.1.7-alpha.
  1467. Changes in version 0.4.7.1-alpha - 2021-09-17
  1468. This version is the first alpha release of the 0.4.7.x series. One
  1469. major feature is Vanguards Lite, from proposal 333, to help mitigate
  1470. guard discovery attacks against onion services. It also includes
  1471. numerous bugfixes.
  1472. o Major features (Proposal 332, onion services, guard selection algorithm):
  1473. - Clients and onion services now choose four long-lived "layer 2"
  1474. guard relays for use as the middle hop in all onion circuits.
  1475. These relays are kept in place for a randomized duration averaging
  1476. 1 week. This mitigates guard discovery attacks against clients and
  1477. short-lived onion services such as OnionShare. Long-lived onion
  1478. services that need high security should still use the Vanguards
  1479. addon (https://github.com/mikeperry-tor/vanguards). Closes ticket
  1480. 40363; implements proposal 333.
  1481. o Minor features (bridge testing support):
  1482. - Let external bridge reachability testing tools discard cached
  1483. bridge descriptors when setting new bridges, so they can be sure
  1484. to get a clean reachability test. Implements ticket 40209.
  1485. o Minor features (fuzzing):
  1486. - When building with --enable-libfuzzer, use a set of compiler flags
  1487. that works with more recent versions of the library. Previously we
  1488. were using a set of flags from 2017. Closes ticket 40407.
  1489. o Minor features (testing configuration):
  1490. - When TestingTorNetwork is enabled, skip the permissions check on
  1491. hidden service directories. Closes ticket 40338.
  1492. - On a testing network, relays can now use the
  1493. TestingMinTimeToReportBandwidth option to change the smallest
  1494. amount of time over which they're willing to report their observed
  1495. maximum bandwidth. Previously, this was fixed at 1 day. For
  1496. safety, values under 2 hours are only supported on testing
  1497. networks. Part of a fix for ticket 40337.
  1498. - Relays on testing networks no longer rate-limit how frequently
  1499. they are willing to report new bandwidth measurements. Part of a
  1500. fix for ticket 40337.
  1501. - Relays on testing networks now report their observed bandwidths
  1502. immediately from startup. Previously, they waited until they had
  1503. been running for a full day. Closes ticket 40337.
  1504. o Minor bugfixes (circuit padding):
  1505. - Don't send STOP circuit padding cells when the other side has
  1506. already shut down the corresponding padding machine. Fixes bug
  1507. 40435; bugfix on 0.4.0.1-alpha.
  1508. o Minor bugfixes (compatibility):
  1509. - Fix compatibility with the most recent Libevent versions, which no
  1510. longer have an evdns_set_random_bytes() function. Because this
  1511. function has been a no-op since Libevent 2.0.4-alpha, it is safe
  1512. for us to just stop calling it. Fixes bug 40371; bugfix
  1513. on 0.2.1.7-alpha.
  1514. o Minor bugfixes (control, sandbox):
  1515. - Allows the control command SAVECONF to succeed when the seccomp
  1516. sandbox is enabled. Makes SAVECONF keep only one backup file, to
  1517. simplify implementation. Fixes bug 40317; bugfix on 0.2.5.4-alpha.
  1518. Patch by Daniel Pinto.
  1519. o Minor bugfixes (heartbeat):
  1520. - Adjust the heartbeat log message about distinct clients to
  1521. consider the HeartbeatPeriod rather than a flat 6-hour delay.
  1522. Fixes bug 40330; bugfix on 0.2.6.3-alpha.
  1523. o Minor bugfixes (logging, relay):
  1524. - Add spaces between the "and" when logging the "Your server has not
  1525. managed to confirm reachability for its" on dual-stack relays.
  1526. Fixes bug 40453; bugfix on 0.4.5.1-alpha. Patch by Neel Chauhan.
  1527. o Minor bugfixes (onion service):
  1528. - Do not flag an HSDir as non-running in case the descriptor upload
  1529. or fetch fails. An onion service closes pending directory
  1530. connections before uploading a new descriptor which leads to
  1531. wrongly flagging many relays and thus affecting circuit path
  1532. selection. Fixes bug 40434; bugfix on 0.2.0.13-alpha.
  1533. o Minor bugfixes (statistics):
  1534. - Fix a fencepost issue when we check stability_last_downrated where
  1535. we called rep_hist_downrate_old_runs() twice. Fixes bug 40394;
  1536. bugfix on 0.2.0.5-alpha. Patch by Neel Chauhan.
  1537. o Minor bugfixes (tests):
  1538. - Fix a bug that prevented some tests from running with the correct
  1539. names. Fixes bug 40365; bugfix on 0.4.3.1-alpha.
  1540. o Documentation:
  1541. - Add links to original tor design paper and anonbib to
  1542. docs/HACKING/README.1st.md. Closes ticket 33742. Patch from
  1543. Emily Bones.
  1544. - Describe the "fingerprint-ed25519" file in the tor.1 man page.
  1545. Fixes bug 40467; bugfix on 0.4.3.1-alpha. Patch by Neel Chauhan.
  1546. Changes in version 0.4.6.7 - 2021-08-16
  1547. This version fixes several bugs from earlier versions of Tor,
  1548. including one that could lead to a denial-of-service attack. Everyone
  1549. running an earlier version, whether as a client, a relay, or an onion
  1550. service, should upgrade to Tor 0.3.5.16, 0.4.5.10, or 0.4.6.7.
  1551. o Major bugfixes (cryptography, security):
  1552. - Resolve an assertion failure caused by a behavior mismatch between
  1553. our batch-signature verification code and our single-signature
  1554. verification code. This assertion failure could be triggered
  1555. remotely, leading to a denial of service attack. We fix this issue
  1556. by disabling batch verification. Fixes bug 40078; bugfix on
  1557. 0.2.6.1-alpha. This issue is also tracked as TROVE-2021-007 and
  1558. CVE-2021-38385. Found by Henry de Valence.
  1559. o Minor feature (fallbackdir):
  1560. - Regenerate fallback directories list. Close ticket 40447.
  1561. o Minor features (geoip data):
  1562. - Update the geoip files to match the IPFire Location Database, as
  1563. retrieved on 2021/08/12.
  1564. o Minor bugfix (crypto):
  1565. - Disable the unused batch verification feature of ed25519-donna.
  1566. Fixes bug 40078; bugfix on 0.2.6.1-alpha. Found by Henry
  1567. de Valence.
  1568. o Minor bugfixes (onion service):
  1569. - Send back the extended SOCKS error 0xF6 (Onion Service Invalid
  1570. Address) for a v2 onion address. Fixes bug 40421; bugfix
  1571. on 0.4.6.2-alpha.
  1572. o Minor bugfixes (relay):
  1573. - Reduce the compression level for data streaming from HIGH to LOW
  1574. in order to reduce CPU load on the directory relays. Fixes bug
  1575. 40301; bugfix on 0.3.5.1-alpha.
  1576. o Minor bugfixes (timekeeping):
  1577. - Calculate the time of day correctly on systems where the time_t
  1578. type includes leap seconds. (This is not the case on most
  1579. operating systems, but on those where it occurs, our tor_timegm
  1580. function did not correctly invert the system's gmtime function,
  1581. which could result in assertion failures when calculating voting
  1582. schedules.) Fixes bug 40383; bugfix on 0.2.0.3-alpha.
  1583. Changes in version 0.4.5.10 - 2021-08-16
  1584. This version fixes several bugs from earlier versions of Tor,
  1585. including one that could lead to a denial-of-service attack. Everyone
  1586. running an earlier version, whether as a client, a relay, or an onion
  1587. service, should upgrade to Tor 0.3.5.16, 0.4.5.10, or 0.4.6.7.
  1588. o Major bugfixes (cryptography, security):
  1589. - Resolve an assertion failure caused by a behavior mismatch between
  1590. our batch-signature verification code and our single-signature
  1591. verification code. This assertion failure could be triggered
  1592. remotely, leading to a denial of service attack. We fix this issue
  1593. by disabling batch verification. Fixes bug 40078; bugfix on
  1594. 0.2.6.1-alpha. This issue is also tracked as TROVE-2021-007 and
  1595. CVE-2021-38385. Found by Henry de Valence.
  1596. o Minor feature (fallbackdir):
  1597. - Regenerate fallback directories list. Close ticket 40447.
  1598. o Minor features (geoip data):
  1599. - Update the geoip files to match the IPFire Location Database, as
  1600. retrieved on 2021/08/12.
  1601. o Minor features (testing):
  1602. - Enable the deterministic RNG for unit tests that covers the
  1603. address set bloomfilter-based API's. Fixes bug 40419; bugfix
  1604. on 0.3.3.2-alpha.
  1605. o Minor bugfix (crypto, backport from 0.4.6.7):
  1606. - Disable the unused batch verification feature of ed25519-donna.
  1607. Fixes bug 40078; bugfix on 0.2.6.1-alpha. Found by Henry
  1608. de Valence.
  1609. o Minor bugfixes (relay, backport from 0.4.6.7):
  1610. - Reduce the compression level for data streaming from HIGH to LOW.
  1611. Fixes bug 40301; bugfix on 0.3.5.1-alpha.
  1612. o Minor bugfixes (timekeeping, backport from 0.4.6.7):
  1613. - Calculate the time of day correctly on systems where the time_t
  1614. type includes leap seconds. (This is not the case on most
  1615. operating systems, but on those where it occurs, our tor_timegm
  1616. function did not correctly invert the system's gmtime function,
  1617. which could result in assertion failures when calculating voting
  1618. schedules.) Fixes bug 40383; bugfix on 0.2.0.3-alpha.
  1619. o Minor bugfixes (warnings, portability, backport from 0.4.6.6):
  1620. - Suppress a strict-prototype warning when building with some
  1621. versions of NSS. Fixes bug 40409; bugfix on 0.3.5.1-alpha.
  1622. Changes in version 0.3.5.16 - 2021-08-16
  1623. This version fixes several bugs from earlier versions of Tor,
  1624. including one that could lead to a denial-of-service attack. Everyone
  1625. running an earlier version, whether as a client, a relay, or an onion
  1626. service, should upgrade to Tor 0.3.5.16, 0.4.5.10, or 0.4.6.7.
  1627. o Major bugfixes (cryptography, security):
  1628. - Resolve an assertion failure caused by a behavior mismatch between
  1629. our batch-signature verification code and our single-signature
  1630. verification code. This assertion failure could be triggered
  1631. remotely, leading to a denial of service attack. We fix this issue
  1632. by disabling batch verification. Fixes bug 40078; bugfix on
  1633. 0.2.6.1-alpha. This issue is also tracked as TROVE-2021-007 and
  1634. CVE-2021-38385. Found by Henry de Valence.
  1635. o Minor feature (fallbackdir):
  1636. - Regenerate fallback directories list. Close ticket 40447.
  1637. o Minor features (geoip data):
  1638. - Update the geoip files to match the IPFire Location Database, as
  1639. retrieved on 2021/08/12.
  1640. o Minor bugfix (crypto, backport from 0.4.6.7):
  1641. - Disable the unused batch verification feature of ed25519-donna.
  1642. Fixes bug 40078; bugfix on 0.2.6.1-alpha. Found by Henry
  1643. de Valence.
  1644. o Minor bugfixes (relay, backport from 0.4.6.7):
  1645. - Reduce the compression level for data streaming from HIGH to LOW.
  1646. Fixes bug 40301; bugfix on 0.3.5.1-alpha.
  1647. Changes in version 0.4.6.6 - 2021-06-30
  1648. Tor 0.4.6.6 makes several small fixes on 0.4.6.5, including one that
  1649. allows Tor to build correctly on older versions of GCC. You should
  1650. upgrade to this version if you were having trouble building Tor
  1651. 0.4.6.5; otherwise, there is probably no need.
  1652. o Minor bugfixes (compilation):
  1653. - Fix a compilation error when trying to build Tor with a compiler
  1654. that does not support const variables in static initializers.
  1655. Fixes bug 40410; bugfix on 0.4.6.5.
  1656. - Suppress a strict-prototype warning when building with some
  1657. versions of NSS. Fixes bug 40409; bugfix on 0.3.5.1-alpha.
  1658. o Minor bugfixes (testing):
  1659. - Enable the deterministic RNG for unit tests that covers the
  1660. address set bloomfilter-based API's. Fixes bug 40419; bugfix
  1661. on 0.3.3.2-alpha.
  1662. Changes in version 0.4.5.9 - 2021-06-14
  1663. Tor 0.4.5.9 fixes several security issues, including a
  1664. denial-of-service attack against onion service clients, and another
  1665. denial-of-service attack against relays. Everybody should upgrade to
  1666. one of 0.3.5.15, 0.4.4.9, 0.4.5.9, or 0.4.6.5.
  1667. o Major bugfixes (security, backport from 0.4.6.5):
  1668. - Don't allow relays to spoof RELAY_END or RELAY_RESOLVED cell on
  1669. half-closed streams. Previously, clients failed to validate which
  1670. hop sent these cells: this would allow a relay on a circuit to end
  1671. a stream that wasn't actually built with it. Fixes bug 40389;
  1672. bugfix on 0.3.5.1-alpha. This issue is also tracked as TROVE-2021-
  1673. 003 and CVE-2021-34548.
  1674. o Major bugfixes (security, defense-in-depth, backport from 0.4.6.5):
  1675. - Detect more failure conditions from the OpenSSL RNG code.
  1676. Previously, we would detect errors from a missing RNG
  1677. implementation, but not failures from the RNG code itself.
  1678. Fortunately, it appears those failures do not happen in practice
  1679. when Tor is using OpenSSL's default RNG implementation. Fixes bug
  1680. 40390; bugfix on 0.2.8.1-alpha. This issue is also tracked as
  1681. TROVE-2021-004. Reported by Jann Horn at Google's Project Zero.
  1682. o Major bugfixes (security, denial of service, backport from 0.4.6.5):
  1683. - Resist a hashtable-based CPU denial-of-service attack against
  1684. relays. Previously we used a naive unkeyed hash function to look
  1685. up circuits in a circuitmux object. An attacker could exploit this
  1686. to construct circuits with chosen circuit IDs, to create
  1687. collisions and make the hash table inefficient. Now we use a
  1688. SipHash construction here instead. Fixes bug 40391; bugfix on
  1689. 0.2.4.4-alpha. This issue is also tracked as TROVE-2021-005 and
  1690. CVE-2021-34549. Reported by Jann Horn from Google's Project Zero.
  1691. - Fix an out-of-bounds memory access in v3 onion service descriptor
  1692. parsing. An attacker could exploit this bug by crafting an onion
  1693. service descriptor that would crash any client that tried to visit
  1694. it. Fixes bug 40392; bugfix on 0.3.0.1-alpha. This issue is also
  1695. tracked as TROVE-2021-006 and CVE-2021-34550. Reported by Sergei
  1696. Glazunov from Google's Project Zero.
  1697. o Minor features (compatibility, backport from 0.4.6.4-rc):
  1698. - Remove an assertion function related to TLS renegotiation. It was
  1699. used nowhere outside the unit tests, and it was breaking
  1700. compilation with recent alpha releases of OpenSSL 3.0.0. Closes
  1701. ticket 40399.
  1702. o Minor features (geoip data):
  1703. - Update the geoip files to match the IPFire Location Database, as
  1704. retrieved on 2021/06/10.
  1705. o Minor bugfixes (control, sandbox, backport from 0.4.6.4-rc):
  1706. - Allow the control command SAVECONF to succeed when the seccomp
  1707. sandbox is enabled, and make SAVECONF keep only one backup file to
  1708. simplify implementation. Previously SAVECONF allowed a large
  1709. number of backup files, which made it incompatible with the
  1710. sandbox. Fixes bug 40317; bugfix on 0.2.5.4-alpha. Patch by
  1711. Daniel Pinto.
  1712. o Minor bugfixes (metrics port, backport from 0.4.6.4-rc):
  1713. - Fix a bug that made tor try to re-bind() on an already open
  1714. MetricsPort every 60 seconds. Fixes bug 40370; bugfix
  1715. on 0.4.5.1-alpha.
  1716. Changes in version 0.4.4.9 - 2021-06-14
  1717. Tor 0.4.4.9 fixes several security issues, including a
  1718. denial-of-service attack against onion service clients, and another
  1719. denial-of-service attack against relays. Everybody should upgrade to
  1720. one of 0.3.5.15, 0.4.4.9, 0.4.5.9, or 0.4.6.5.
  1721. Note that the scheduled end-of-life date for the Tor 0.4.4.x series is
  1722. June 15. This is therefore the last release in its series. Everybody
  1723. still running 0.4.4.x should plan to upgrade to 0.4.5.x or later.
  1724. o Major bugfixes (security, backport from 0.4.6.5):
  1725. - Don't allow relays to spoof RELAY_END or RELAY_RESOLVED cell on
  1726. half-closed streams. Previously, clients failed to validate which
  1727. hop sent these cells: this would allow a relay on a circuit to end
  1728. a stream that wasn't actually built with it. Fixes bug 40389;
  1729. bugfix on 0.3.5.1-alpha. This issue is also tracked as TROVE-2021-
  1730. 003 and CVE-2021-34548.
  1731. o Major bugfixes (security, defense-in-depth, backport from 0.4.6.5):
  1732. - Detect more failure conditions from the OpenSSL RNG code.
  1733. Previously, we would detect errors from a missing RNG
  1734. implementation, but not failures from the RNG code itself.
  1735. Fortunately, it appears those failures do not happen in practice
  1736. when Tor is using OpenSSL's default RNG implementation. Fixes bug
  1737. 40390; bugfix on 0.2.8.1-alpha. This issue is also tracked as
  1738. TROVE-2021-004. Reported by Jann Horn at Google's Project Zero.
  1739. o Major bugfixes (security, denial of service, backport from 0.4.6.5):
  1740. - Resist a hashtable-based CPU denial-of-service attack against
  1741. relays. Previously we used a naive unkeyed hash function to look
  1742. up circuits in a circuitmux object. An attacker could exploit this
  1743. to construct circuits with chosen circuit IDs, to create
  1744. collisions and make the hash table inefficient. Now we use a
  1745. SipHash construction here instead. Fixes bug 40391; bugfix on
  1746. 0.2.4.4-alpha. This issue is also tracked as TROVE-2021-005 and
  1747. CVE-2021-34549. Reported by Jann Horn from Google's Project Zero.
  1748. - Fix an out-of-bounds memory access in v3 onion service descriptor
  1749. parsing. An attacker could exploit this bug by crafting an onion
  1750. service descriptor that would crash any client that tried to visit
  1751. it. Fixes bug 40392; bugfix on 0.3.0.1-alpha. This issue is also
  1752. tracked as TROVE-2021-006 and CVE-2021-34550. Reported by Sergei
  1753. Glazunov from Google's Project Zero.
  1754. o Minor features (compatibility, backport from 0.4.6.4-rc):
  1755. - Remove an assertion function related to TLS renegotiation. It was
  1756. used nowhere outside the unit tests, and it was breaking
  1757. compilation with recent alpha releases of OpenSSL 3.0.0. Closes
  1758. ticket 40399.
  1759. o Minor features (fallback directory list, backport from 0.4.6.2-alpha):
  1760. - Regenerate the list of fallback directories to contain a new set
  1761. of 200 relays. Closes ticket 40265.
  1762. o Minor features (geoip data):
  1763. - Update the geoip files to match the IPFire Location Database, as
  1764. retrieved on 2021/06/10.
  1765. o Minor bugfixes (channel, DoS, backport from 0.4.6.2-alpha):
  1766. - Fix a non-fatal BUG() message due to a too-early free of a string,
  1767. when listing a client connection from the DoS defenses subsystem.
  1768. Fixes bug 40345; bugfix on 0.4.3.4-rc.
  1769. o Minor bugfixes (compiler warnings, backport from 0.4.6.3-rc):
  1770. - Fix an indentation problem that led to a warning from GCC 11.1.1.
  1771. Fixes bug 40380; bugfix on 0.3.0.1-alpha.
  1772. Changes in version 0.3.5.15 - 2021-06-14
  1773. Tor 0.3.5.15 fixes several security issues, including a
  1774. denial-of-service attack against onion service clients, and another
  1775. denial-of-service attack against relays. Everybody should upgrade to
  1776. one of 0.3.5.15, 0.4.4.9, 0.4.5.9, or 0.4.6.5.
  1777. o Major bugfixes (security, backport from 0.4.6.5):
  1778. - Don't allow relays to spoof RELAY_END or RELAY_RESOLVED cell on
  1779. half-closed streams. Previously, clients failed to validate which
  1780. hop sent these cells: this would allow a relay on a circuit to end
  1781. a stream that wasn't actually built with it. Fixes bug 40389;
  1782. bugfix on 0.3.5.1-alpha. This issue is also tracked as TROVE-2021-
  1783. 003 and CVE-2021-34548.
  1784. o Major bugfixes (security, defense-in-depth, backport from 0.4.6.5):
  1785. - Detect more failure conditions from the OpenSSL RNG code.
  1786. Previously, we would detect errors from a missing RNG
  1787. implementation, but not failures from the RNG code itself.
  1788. Fortunately, it appears those failures do not happen in practice
  1789. when Tor is using OpenSSL's default RNG implementation. Fixes bug
  1790. 40390; bugfix on 0.2.8.1-alpha. This issue is also tracked as
  1791. TROVE-2021-004. Reported by Jann Horn at Google's Project Zero.
  1792. o Major bugfixes (security, denial of service, backport from 0.4.6.5):
  1793. - Resist a hashtable-based CPU denial-of-service attack against
  1794. relays. Previously we used a naive unkeyed hash function to look
  1795. up circuits in a circuitmux object. An attacker could exploit this
  1796. to construct circuits with chosen circuit IDs, to create
  1797. collisions and make the hash table inefficient. Now we use a
  1798. SipHash construction here instead. Fixes bug 40391; bugfix on
  1799. 0.2.4.4-alpha. This issue is also tracked as TROVE-2021-005 and
  1800. CVE-2021-34549. Reported by Jann Horn from Google's Project Zero.
  1801. - Fix an out-of-bounds memory access in v3 onion service descriptor
  1802. parsing. An attacker could exploit this bug by crafting an onion
  1803. service descriptor that would crash any client that tried to visit
  1804. it. Fixes bug 40392; bugfix on 0.3.0.1-alpha. This issue is also
  1805. tracked as TROVE-2021-006 and CVE-2021-34550. Reported by Sergei
  1806. Glazunov from Google's Project Zero.
  1807. o Minor bugfixes (compiler warnings, backport from 0.4.6.3-rc):
  1808. - Fix an indentation problem that led to a warning from GCC 11.1.1.
  1809. Fixes bug 40380; bugfix on 0.3.0.1-alpha.
  1810. o Minor features (compatibility, backport from 0.4.6.4-rc):
  1811. - Remove an assertion function related to TLS renegotiation. It was
  1812. used nowhere outside the unit tests, and it was breaking
  1813. compilation with recent alpha releases of OpenSSL 3.0.0. Closes
  1814. ticket 40399.
  1815. o Minor features (fallback directory list, backport from 0.4.6.2-alpha):
  1816. - Regenerate the list of fallback directories to contain a new set
  1817. of 200 relays. Closes ticket 40265.
  1818. o Minor features (geoip data):
  1819. - Update the geoip files to match the IPFire Location Database, as
  1820. retrieved on 2021/06/10.
  1821. Changes in version 0.4.6.5 - 2021-06-14
  1822. Tor 0.4.6.5 is the first stable release in its series. The 0.4.6.x
  1823. series includes numerous features and bugfixes, including a significant
  1824. improvement to our circuit timeout algorithm that should improve
  1825. observed client performance, and a way for relays to report when they are
  1826. overloaded.
  1827. This release also includes security fixes for several security issues,
  1828. including a denial-of-service attack against onion service clients,
  1829. and another denial-of-service attack against relays. Everybody should
  1830. upgrade to one of 0.3.5.15, 0.4.4.9, 0.4.5.9, or 0.4.6.5.
  1831. Below are the changes since 0.4.6.4-rc. For a complete list of changes
  1832. since 0.4.5.8, see the ReleaseNotes file.
  1833. o Major bugfixes (security):
  1834. - Don't allow relays to spoof RELAY_END or RELAY_RESOLVED cell on
  1835. half-closed streams. Previously, clients failed to validate which
  1836. hop sent these cells: this would allow a relay on a circuit to end
  1837. a stream that wasn't actually built with it. Fixes bug 40389;
  1838. bugfix on 0.3.5.1-alpha. This issue is also tracked as TROVE-2021-
  1839. 003 and CVE-2021-34548.
  1840. o Major bugfixes (security, defense-in-depth):
  1841. - Detect more failure conditions from the OpenSSL RNG code.
  1842. Previously, we would detect errors from a missing RNG
  1843. implementation, but not failures from the RNG code itself.
  1844. Fortunately, it appears those failures do not happen in practice
  1845. when Tor is using OpenSSL's default RNG implementation. Fixes bug
  1846. 40390; bugfix on 0.2.8.1-alpha. This issue is also tracked as
  1847. TROVE-2021-004. Reported by Jann Horn at Google's Project Zero.
  1848. o Major bugfixes (security, denial of service):
  1849. - Resist a hashtable-based CPU denial-of-service attack against
  1850. relays. Previously we used a naive unkeyed hash function to look
  1851. up circuits in a circuitmux object. An attacker could exploit this
  1852. to construct circuits with chosen circuit IDs, to create
  1853. collisions and make the hash table inefficient. Now we use a
  1854. SipHash construction here instead. Fixes bug 40391; bugfix on
  1855. 0.2.4.4-alpha. This issue is also tracked as TROVE-2021-005 and
  1856. CVE-2021-34549. Reported by Jann Horn from Google's Project Zero.
  1857. - Fix an out-of-bounds memory access in v3 onion service descriptor
  1858. parsing. An attacker could exploit this bug by crafting an onion
  1859. service descriptor that would crash any client that tried to visit
  1860. it. Fixes bug 40392; bugfix on 0.3.0.1-alpha. This issue is also
  1861. tracked as TROVE-2021-006 and CVE-2021-34550. Reported by Sergei
  1862. Glazunov from Google's Project Zero.
  1863. o Minor features (geoip data):
  1864. - Update the geoip files to match the IPFire Location Database, as
  1865. retrieved on 2021/06/10.
  1866. o Minor features (logging, diagnostic):
  1867. - Log decompression failures at a higher severity level, since they
  1868. can help provide missing context for other warning messages. We
  1869. rate-limit these messages, to avoid flooding the logs if they
  1870. begin to occur frequently. Closes ticket 40175.
  1871. Changes in version 0.4.6.4-rc - 2021-05-28
  1872. Tor 0.4.6.4-rc fixes a few bugs from previous releases. This, we hope,
  1873. the final release candidate in its series: unless major new issues are
  1874. found, the next release will be stable.
  1875. o Minor features (compatibility):
  1876. - Remove an assertion function related to TLS renegotiation. It was
  1877. used nowhere outside the unit tests, and it was breaking
  1878. compilation with recent alpha releases of OpenSSL 3.0.0. Closes
  1879. ticket 40399.
  1880. o Minor bugfixes (consensus handling):
  1881. - Avoid a set of bugs that could be caused by inconsistently
  1882. preferring an out-of-date consensus stored in a stale directory
  1883. cache over a more recent one stored on disk as the latest
  1884. consensus. Fixes bug 40375; bugfix on 0.3.1.1-alpha.
  1885. o Minor bugfixes (control, sandbox):
  1886. - Allow the control command SAVECONF to succeed when the seccomp
  1887. sandbox is enabled, and make SAVECONF keep only one backup file to
  1888. simplify implementation. Previously SAVECONF allowed a large
  1889. number of backup files, which made it incompatible with the
  1890. sandbox. Fixes bug 40317; bugfix on 0.2.5.4-alpha. Patch by
  1891. Daniel Pinto.
  1892. o Minor bugfixes (metrics port):
  1893. - Fix a bug that made tor try to re-bind() on an already open
  1894. MetricsPort every 60 seconds. Fixes bug 40370; bugfix
  1895. on 0.4.5.1-alpha.
  1896. o Removed features:
  1897. - Remove unneeded code for parsing private keys in directory
  1898. documents. This code was only used for client authentication in v2
  1899. onion services, which are now unsupported. Closes ticket 40374.
  1900. Changes in version 0.4.5.8 - 2021-05-10
  1901. Tor 0.4.5.8 fixes several bugs in earlier version, backporting fixes
  1902. from the 0.4.6.x series.
  1903. o Minor features (compatibility, Linux seccomp sandbox, backport from 0.4.6.3-rc):
  1904. - Add a workaround to enable the Linux sandbox to work correctly
  1905. with Glibc 2.33. This version of Glibc has started using the
  1906. fstatat() system call, which previously our sandbox did not allow.
  1907. Closes ticket 40382; see the ticket for a discussion of trade-offs.
  1908. o Minor features (compilation, backport from 0.4.6.3-rc):
  1909. - Make the autoconf script build correctly with autoconf versions
  1910. 2.70 and later. Closes part of ticket 40335.
  1911. o Minor features (fallback directory list, backport from 0.4.6.2-alpha):
  1912. - Regenerate the list of fallback directories to contain a new set
  1913. of 200 relays. Closes ticket 40265.
  1914. o Minor features (geoip data):
  1915. - Update the geoip files to match the IPFire Location Database, as
  1916. retrieved on 2021/05/07.
  1917. o Minor features (onion services):
  1918. - Add warning message when connecting to now deprecated v2 onion
  1919. services. As announced, Tor 0.4.5.x is the last series that will
  1920. support v2 onions. Closes ticket 40373.
  1921. o Minor bugfixes (bridge, pluggable transport, backport from 0.4.6.2-alpha):
  1922. - Fix a regression that made it impossible start Tor using a bridge
  1923. line with a transport name and no fingerprint. Fixes bug 40360;
  1924. bugfix on 0.4.5.4-rc.
  1925. o Minor bugfixes (build, cross-compilation, backport from 0.4.6.3-rc):
  1926. - Allow a custom "ar" for cross-compilation. Our previous build
  1927. script had used the $AR environment variable in most places, but
  1928. it missed one. Fixes bug 40369; bugfix on 0.4.5.1-alpha.
  1929. o Minor bugfixes (channel, DoS, backport from 0.4.6.2-alpha):
  1930. - Fix a non-fatal BUG() message due to a too-early free of a string,
  1931. when listing a client connection from the DoS defenses subsystem.
  1932. Fixes bug 40345; bugfix on 0.4.3.4-rc.
  1933. o Minor bugfixes (compiler warnings, backport from 0.4.6.3-rc):
  1934. - Fix an indentation problem that led to a warning from GCC 11.1.1.
  1935. Fixes bug 40380; bugfix on 0.3.0.1-alpha.
  1936. o Minor bugfixes (controller, backport from 0.4.6.1-alpha):
  1937. - Fix a "BUG" warning that would appear when a controller chooses
  1938. the first hop for a circuit, and that circuit completes. Fixes bug
  1939. 40285; bugfix on 0.3.2.1-alpha.
  1940. o Minor bugfixes (onion service, client, memory leak, backport from 0.4.6.3-rc):
  1941. - Fix a bug where an expired cached descriptor could get overwritten
  1942. with a new one without freeing it, leading to a memory leak. Fixes
  1943. bug 40356; bugfix on 0.3.5.1-alpha.
  1944. o Minor bugfixes (testing, BSD, backport from 0.4.6.2-alpha):
  1945. - Fix pattern-matching errors when patterns expand to invalid paths
  1946. on BSD systems. Fixes bug 40318; bugfix on 0.4.5.1-alpha. Patch by
  1947. Daniel Pinto.
  1948. Changes in version 0.4.6.3-rc - 2021-05-10
  1949. Tor 0.4.6.3-rc is the first release candidate in its series. It fixes
  1950. a few small bugs from previous versions, and adds a better error
  1951. message when trying to use (no longer supported) v2 onion services.
  1952. Though we anticipate that we'll be doing a bit more clean-up between
  1953. now and the stable release, we expect that our remaining changes will
  1954. be fairly simple. There will likely be at least one more release
  1955. candidate before 0.4.6.x is stable.
  1956. o Major bugfixes (onion service, control port):
  1957. - Make the ADD_ONION command properly configure client authorization.
  1958. Before this fix, the created onion failed to add the client(s).
  1959. Fixes bug 40378; bugfix on 0.4.6.1-alpha.
  1960. o Minor features (compatibility, Linux seccomp sandbox):
  1961. - Add a workaround to enable the Linux sandbox to work correctly
  1962. with Glibc 2.33. This version of Glibc has started using the
  1963. fstatat() system call, which previously our sandbox did not allow.
  1964. Closes ticket 40382; see the ticket for a discussion of trade-offs.
  1965. o Minor features (compilation):
  1966. - Make the autoconf script build correctly with autoconf versions
  1967. 2.70 and later. Closes part of ticket 40335.
  1968. o Minor features (geoip data):
  1969. - Update the geoip files to match the IPFire Location Database, as
  1970. retrieved on 2021/05/07.
  1971. o Minor features (onion services):
  1972. - Add a warning message when trying to connect to (no longer
  1973. supported) v2 onion services. Closes ticket 40373.
  1974. o Minor bugfixes (build, cross-compilation):
  1975. - Allow a custom "ar" for cross-compilation. Our previous build
  1976. script had used the $AR environment variable in most places, but
  1977. it missed one. Fixes bug 40369; bugfix on 0.4.5.1-alpha.
  1978. o Minor bugfixes (compiler warnings):
  1979. - Fix an indentation problem that led to a warning from GCC 11.1.1.
  1980. Fixes bug 40380; bugfix on 0.3.0.1-alpha.
  1981. o Minor bugfixes (logging, relay):
  1982. - Emit a warning if an Address is found to be internal and tor can't
  1983. use it. Fixes bug 40290; bugfix on 0.4.5.1-alpha.
  1984. o Minor bugfixes (onion service, client, memory leak):
  1985. - Fix a bug where an expired cached descriptor could get overwritten
  1986. with a new one without freeing it, leading to a memory leak. Fixes
  1987. bug 40356; bugfix on 0.3.5.1-alpha.
  1988. Changes in version 0.4.6.2-alpha - 2021-04-15
  1989. Tor 0.4.6.2-alpha is the second alpha in its series. It fixes several
  1990. small bugs in previous releases, and solves other issues that had
  1991. enabled denial-of-service attacks and affected integration with
  1992. other tools.
  1993. o Minor features (client):
  1994. - Clients now check whether their streams are attempting to re-enter
  1995. the Tor network (i.e. to send Tor traffic over Tor), and close
  1996. them preemptively if they think exit relays will refuse them for
  1997. this reason. See ticket 2667 for details. Closes ticket 40271.
  1998. o Minor features (command line):
  1999. - Add long format name "--torrc-file" equivalent to the existing
  2000. command-line option "-f". Closes ticket 40324. Patch by
  2001. Daniel Pinto.
  2002. o Minor features (dormant mode):
  2003. - Add a new 'DormantTimeoutEnabled' option to allow coarse-grained
  2004. control over whether the client ever becomes dormant from
  2005. inactivity. Most people won't need this. Closes ticket 40228.
  2006. o Minor features (fallback directory list):
  2007. - Regenerate the list of fallback directories to contain a new set
  2008. of 200 relays. Closes ticket 40265.
  2009. o Minor features (geoip data):
  2010. - Update the geoip files to match the IPFire Location Database, as
  2011. retrieved on 2021/04/13.
  2012. o Minor features (logging):
  2013. - Edit heartbeat log messages so that more of them begin with the
  2014. string "Heartbeat: ". Closes ticket 40322; patch
  2015. from 'cypherpunks'.
  2016. o Minor bugfixes (bridge, pluggable transport):
  2017. - Fix a regression that made it impossible start Tor using a bridge
  2018. line with a transport name and no fingerprint. Fixes bug 40360;
  2019. bugfix on 0.4.5.4-rc.
  2020. o Minor bugfixes (channel, DoS):
  2021. - Fix a non-fatal BUG() message due to a too-early free of a string,
  2022. when listing a client connection from the DoS defenses subsystem.
  2023. Fixes bug 40345; bugfix on 0.4.3.4-rc.
  2024. o Minor bugfixes (compilation):
  2025. - Fix a compilation warning about unused functions when building
  2026. with a libc that lacks the GLOB_ALTDIRFUNC constant. Fixes bug
  2027. 40354; bugfix on 0.4.5.1-alpha. Patch by Daniel Pinto.
  2028. o Minor bugfixes (configuration):
  2029. - Fix pattern-matching for directories on all platforms when using
  2030. %include options in configuration files. This patch also fixes
  2031. compilation on musl libc based systems. Fixes bug 40141; bugfix
  2032. on 0.4.5.1-alpha.
  2033. o Minor bugfixes (relay):
  2034. - Move the "overload-general" line from extrainfo to the server
  2035. descriptor. Fixes bug 40364; bugfix on 0.4.6.1-alpha.
  2036. o Minor bugfixes (testing, BSD):
  2037. - Fix pattern-matching errors when patterns expand to invalid paths
  2038. on BSD systems. Fixes bug 40318; bugfix on 0.4.5.1-alpha. Patch by
  2039. Daniel Pinto.
  2040. o Documentation (manual):
  2041. - Move the ServerTransport* options to the "SERVER OPTIONS" section.
  2042. Closes issue 40331.
  2043. - Indicate that the HiddenServiceStatistics option also applies to
  2044. bridges. Closes ticket 40346.
  2045. - Move the description of BridgeRecordUsageByCountry to the section
  2046. "STATISTICS OPTIONS". Closes ticket 40323.
  2047. Changes in version 0.4.6.1-alpha - 2021-03-18
  2048. Tor 0.4.6.1-alpha is the first alpha release in the 0.4.6.x series. It
  2049. improves client circuit performance, adds missing features, and
  2050. improves some of our DoS handling and statistics reporting. It also
  2051. includes numerous smaller bugfixes.
  2052. Below are the changes since 0.4.5.7. (Note that this release DOES
  2053. include the fixes for the security bugs already fixed in 0.4.5.7.)
  2054. o Major features (control port, onion services):
  2055. - Add controller support for creating version 3 onion services with
  2056. client authorization. Previously, only v2 onion services could be
  2057. created with client authorization. Closes ticket 40084. Patch by
  2058. Neel Chauhan.
  2059. o Major features (directory authority):
  2060. - When voting on a relay with a Sybil-like appearance, add the Sybil
  2061. flag when clearing out the other flags. This lets a relay operator
  2062. know why their relay hasn't been included in the consensus. Closes
  2063. ticket 40255. Patch by Neel Chauhan.
  2064. o Major features (metrics):
  2065. - Relays now report how overloaded they are in their extrainfo
  2066. documents. This information is controlled with the
  2067. OverloadStatistics torrc option, and it will be used to improve
  2068. decisions about the network's load balancing. Implements proposal
  2069. 328; closes ticket 40222.
  2070. o Major features (relay, denial of service):
  2071. - Add a new DoS subsystem feature to control the rate of client
  2072. connections for relays. Closes ticket 40253.
  2073. o Major features (statistics):
  2074. - Relays now publish statistics about the number of v3 onion
  2075. services and volume of v3 onion service traffic, in the same
  2076. manner they already do for v2 onions. Closes ticket 23126.
  2077. o Major bugfixes (circuit build timeout):
  2078. - Improve the accuracy of our circuit build timeout calculation for
  2079. 60%, 70%, and 80% build rates for various guard choices. We now
  2080. use a maximum likelihood estimator for Pareto parameters of the
  2081. circuit build time distribution, instead of a "right-censored
  2082. estimator". This causes clients to ignore circuits that never
  2083. finish building in their timeout calculations. Previously, clients
  2084. were counting such unfinished circuits as having the highest
  2085. possible build time value, when in reality these circuits most
  2086. likely just contain relays that are offline. We also now wait a
  2087. bit longer to let circuits complete for measurement purposes,
  2088. lower the minimum possible effective timeout from 1.5 seconds to
  2089. 10ms, and increase the resolution of the circuit build time
  2090. histogram from 50ms bin widths to 10ms bin widths. Additionally,
  2091. we alter our estimate Xm by taking the maximum of the top 10 most
  2092. common build time values of the 10ms histogram, and compute Xm as
  2093. the average of these. Fixes bug 40168; bugfix on 0.2.2.14-alpha.
  2094. - Remove max_time calculation and associated warning from circuit
  2095. build timeout 'alpha' parameter estimation, as this is no longer
  2096. needed by our new estimator from 40168. Fixes bug 34088; bugfix
  2097. on 0.2.2.9-alpha.
  2098. o Major bugfixes (signing key):
  2099. - In the tor-gencert utility, give an informative error message if
  2100. the passphrase given in `--create-identity-key` is too short.
  2101. Fixes bug 40189; bugfix on 0.2.0.1-alpha. Patch by Neel Chauhan.
  2102. o Minor features (bridge):
  2103. - We now announce the URL to Tor's new bridge status at
  2104. https://bridges.torproject.org/ when Tor is configured to run as a
  2105. bridge relay. Closes ticket 30477.
  2106. o Minor features (build system):
  2107. - New "make lsp" command to auto generate the compile_commands.json
  2108. file used by the ccls server. The "bear" program is needed for
  2109. this. Closes ticket 40227.
  2110. o Minor features (command-line interface):
  2111. - Add build informations to `tor --version` in order to ease
  2112. reproducible builds. Closes ticket 32102.
  2113. - When parsing command-line flags that take an optional argument,
  2114. treat the argument as absent if it would start with a '-'
  2115. character. Arguments in that form are not intelligible for any of
  2116. our optional-argument flags. Closes ticket 40223.
  2117. - Allow a relay operator to list the ed25519 keys on the command
  2118. line by adding the `rsa` and `ed25519` arguments to the
  2119. --list-fingerprint flag to show the respective RSA and ed25519
  2120. relay fingerprint. Closes ticket 33632. Patch by Neel Chauhan.
  2121. o Minor features (control port, stream handling):
  2122. - Add the stream ID to the event line in the ADDRMAP control event.
  2123. Closes ticket 40249. Patch by Neel Chauhan.
  2124. o Minor features (dormant mode):
  2125. - Add a new 'DormantTimeoutEnabled' option for coarse-grained
  2126. control over whether the client can become dormant from
  2127. inactivity. Most people won't need this. Closes ticket 40228.
  2128. o Minor features (logging):
  2129. - Change the DoS subsystem heartbeat line format to be more clear on
  2130. what has been detected/rejected, and which option is disabled (if
  2131. any). Closes ticket 40308.
  2132. - In src/core/mainloop/mainloop.c and src/core/mainloop/connection.c,
  2133. put brackets around IPv6 addresses in log messages. Closes ticket
  2134. 40232. Patch by Neel Chauhan.
  2135. o Minor features (performance, windows):
  2136. - Use SRWLocks to implement locking on Windows. Replaces the
  2137. "critical section" locking implementation with the faster
  2138. SRWLocks, available since Windows Vista. Closes ticket 17927.
  2139. Patch by Daniel Pinto.
  2140. o Minor features (protocol, proxy support, defense in depth):
  2141. - Close HAProxy connections if they somehow manage to send us data
  2142. before we start reading. Closes another case of ticket 40017.
  2143. o Minor features (tests, portability):
  2144. - Port the hs_build_address.py test script to work with recent
  2145. versions of python. Closes ticket 40213. Patch from
  2146. Samanta Navarro.
  2147. o Minor features (vote document):
  2148. - Add a "stats" line to directory authority votes, to report various
  2149. statistics that authorities compute about the relays. This will
  2150. help us diagnose the network better. Closes ticket 40314.
  2151. o Minor bugfixes (build):
  2152. - The configure script now shows whether or not lzma and zstd have
  2153. been used, not just if the enable flag was passed in. Fixes bug
  2154. 40236; bugfix on 0.4.3.1-alpha.
  2155. o Minor bugfixes (compatibility):
  2156. - Fix a failure in the test cases when running on the "hppa"
  2157. architecture, along with a related test that might fail on other
  2158. architectures in the future. Fixes bug 40274; bugfix
  2159. on 0.2.5.1-alpha.
  2160. o Minor bugfixes (controller):
  2161. - Fix a "BUG" warning that would appear when a controller chooses
  2162. the first hop for a circuit, and that circuit completes. Fixes bug
  2163. 40285; bugfix on 0.3.2.1-alpha.
  2164. o Minor bugfixes (directory authorities, voting):
  2165. - Add a new consensus method (31) to support any future changes that
  2166. authorities decide to make to the value of bwweightscale or
  2167. maxunmeasuredbw. Previously, there was a bug that prevented the
  2168. authorities from parsing these consensus parameters correctly under
  2169. most circumstances. Fixes bug 19011; bugfix on 0.2.2.10-alpha.
  2170. o Minor bugfixes (ipv6):
  2171. - Allow non-SOCKSPorts to disable IPv4, IPv6, and PreferIPv4. Some
  2172. rare configurations might break, but in this case you can disable
  2173. NoIPv4Traffic and NoIPv6Traffic as needed. Fixes bug 33607; bugfix
  2174. on 0.4.1.1-alpha. Patch by Neel Chauhan.
  2175. o Minor bugfixes (key generation):
  2176. - Do not require a valid torrc when using the `--keygen` argument to
  2177. generate a signing key. This allows us to generate keys on systems
  2178. or users which may not run Tor. Fixes bug 40235; bugfix on
  2179. 0.2.7.2-alpha. Patch by Neel Chauhan.
  2180. o Minor bugfixes (onion services, logging):
  2181. - Downgrade the severity of a few rendezvous circuit-related
  2182. warnings from warning to info. Fixes bug 40207; bugfix on
  2183. 0.3.2.1-alpha. Patch by Neel Chauhan.
  2184. o Minor bugfixes (relay):
  2185. - Reduce the compression level for data streaming from HIGH to LOW.
  2186. This should reduce the CPU and memory burden for directory caches.
  2187. Fixes bug 40301; bugfix on 0.3.5.1-alpha.
  2188. o Code simplification and refactoring:
  2189. - Remove the orconn_ext_or_id_map structure and related functions.
  2190. (Nothing outside of unit tests used them.) Closes ticket 33383.
  2191. Patch by Neel Chauhan.
  2192. o Removed features:
  2193. - As of this release, Tor no longer supports the old v2 onion
  2194. services. They were deprecated last July for security, and support
  2195. will be removed entirely later this year. We strongly encourage
  2196. everybody to migrate to v3 onion services. For more information,
  2197. see https://blog.torproject.org/v2-deprecation-timeline . Closes
  2198. ticket 40266. (NOTE: We accidentally released an earlier version
  2199. of the 0.4.6.1-alpha changelog without this entry. Sorry for
  2200. the confusion!)
  2201. o Code simplification and refactoring (metrics, DoS):
  2202. - Move the DoS subsystem into the subsys manager, including its
  2203. configuration options. Closes ticket 40261.
  2204. o Removed features (relay):
  2205. - Because DirPorts are only used on authorities, relays no longer
  2206. advertise them. Similarly, self-testing for DirPorts has been
  2207. disabled, since an unreachable DirPort is no reason for a relay
  2208. not to advertise itself. (Configuring a DirPort will still work,
  2209. for now.) Closes ticket 40282.
  2210. Changes in version 0.3.5.14 - 2021-03-16
  2211. Tor 0.3.5.14 backports fixes for two important denial-of-service bugs
  2212. in earlier versions of Tor.
  2213. One of these vulnerabilities (TROVE-2021-001) would allow an attacker
  2214. who can send directory data to a Tor instance to force that Tor
  2215. instance to consume huge amounts of CPU. This is easiest to exploit
  2216. against authorities, since anybody can upload to them, but directory
  2217. caches could also exploit this vulnerability against relays or clients
  2218. when they download. The other vulnerability (TROVE-2021-002) only
  2219. affects directory authorities, and would allow an attacker to remotely
  2220. crash the authority with an assertion failure. Patches have already
  2221. been provided to the authority operators, to help ensure
  2222. network stability.
  2223. We recommend that everybody upgrade to one of the releases that fixes
  2224. these issues (0.3.5.14, 0.4.4.8, or 0.4.5.7) as they become available
  2225. to you.
  2226. This release also updates our GeoIP data source, and fixes a
  2227. compatibility issue.
  2228. o Major bugfixes (security, denial of service, backport from 0.4.5.7):
  2229. - Disable the dump_desc() function that we used to dump unparseable
  2230. information to disk. It was called incorrectly in several places,
  2231. in a way that could lead to excessive CPU usage. Fixes bug 40286;
  2232. bugfix on 0.2.2.1-alpha. This bug is also tracked as TROVE-2021-
  2233. 001 and CVE-2021-28089.
  2234. - Fix a bug in appending detached signatures to a pending consensus
  2235. document that could be used to crash a directory authority. Fixes
  2236. bug 40316; bugfix on 0.2.2.6-alpha. Tracked as TROVE-2021-002
  2237. and CVE-2021-28090.
  2238. o Minor features (geoip data, backport from 0.4.5.7):
  2239. - We have switched geoip data sources. Previously we shipped IP-to-
  2240. country mappings from Maxmind's GeoLite2, but in 2019 they changed
  2241. their licensing terms, so we were unable to update them after that
  2242. point. We now ship geoip files based on the IPFire Location
  2243. Database instead. (See https://location.ipfire.org/ for more
  2244. information). This release updates our geoip files to match the
  2245. IPFire Location Database as retrieved on 2021/03/12. Closes
  2246. ticket 40224.
  2247. o Removed features (mallinfo deprecated, backport from 0.4.5.7):
  2248. - Remove mallinfo() usage entirely. Libc 2.33+ now deprecates it.
  2249. Closes ticket 40309.
  2250. Changes in version 0.4.4.8 - 2021-03-16
  2251. Tor 0.4.4.8 backports fixes for two important denial-of-service bugs
  2252. in earlier versions of Tor.
  2253. One of these vulnerabilities (TROVE-2021-001) would allow an attacker
  2254. who can send directory data to a Tor instance to force that Tor
  2255. instance to consume huge amounts of CPU. This is easiest to exploit
  2256. against authorities, since anybody can upload to them, but directory
  2257. caches could also exploit this vulnerability against relays or clients
  2258. when they download. The other vulnerability (TROVE-2021-002) only
  2259. affects directory authorities, and would allow an attacker to remotely
  2260. crash the authority with an assertion failure. Patches have already
  2261. been provided to the authority operators, to help ensure
  2262. network stability.
  2263. We recommend that everybody upgrade to one of the releases that fixes
  2264. these issues (0.3.5.14, 0.4.4.8, or 0.4.5.7) as they become available
  2265. to you.
  2266. This release also updates our GeoIP data source, and fixes a
  2267. compatibility issue.
  2268. o Major bugfixes (security, denial of service, backport from 0.4.5.7):
  2269. - Disable the dump_desc() function that we used to dump unparseable
  2270. information to disk. It was called incorrectly in several places,
  2271. in a way that could lead to excessive CPU usage. Fixes bug 40286;
  2272. bugfix on 0.2.2.1-alpha. This bug is also tracked as TROVE-2021-
  2273. 001 and CVE-2021-28089.
  2274. - Fix a bug in appending detached signatures to a pending consensus
  2275. document that could be used to crash a directory authority. Fixes
  2276. bug 40316; bugfix on 0.2.2.6-alpha. Tracked as TROVE-2021-002
  2277. and CVE-2021-28090.
  2278. o Minor features (geoip data, backport from 0.4.5.7):
  2279. - We have switched geoip data sources. Previously we shipped IP-to-
  2280. country mappings from Maxmind's GeoLite2, but in 2019 they changed
  2281. their licensing terms, so we were unable to update them after that
  2282. point. We now ship geoip files based on the IPFire Location
  2283. Database instead. (See https://location.ipfire.org/ for more
  2284. information). This release updates our geoip files to match the
  2285. IPFire Location Database as retrieved on 2021/03/12. Closes
  2286. ticket 40224.
  2287. o Removed features (mallinfo deprecated, backport from 0.4.5.7):
  2288. - Remove mallinfo() usage entirely. Libc 2.33+ now deprecates it.
  2289. Closes ticket 40309.
  2290. Changes in version 0.4.5.7 - 2021-03-16
  2291. Tor 0.4.5.7 fixes two important denial-of-service bugs in earlier
  2292. versions of Tor.
  2293. One of these vulnerabilities (TROVE-2021-001) would allow an attacker
  2294. who can send directory data to a Tor instance to force that Tor
  2295. instance to consume huge amounts of CPU. This is easiest to exploit
  2296. against authorities, since anybody can upload to them, but directory
  2297. caches could also exploit this vulnerability against relays or clients
  2298. when they download. The other vulnerability (TROVE-2021-002) only
  2299. affects directory authorities, and would allow an attacker to remotely
  2300. crash the authority with an assertion failure. Patches have already
  2301. been provided to the authority operators, to help ensure
  2302. network stability.
  2303. We recommend that everybody upgrade to one of the releases that fixes
  2304. these issues (0.3.5.14, 0.4.4.8, or 0.4.5.7) as they become available
  2305. to you.
  2306. This release also updates our GeoIP data source, and fixes a few
  2307. smaller bugs in earlier releases.
  2308. o Major bugfixes (security, denial of service):
  2309. - Disable the dump_desc() function that we used to dump unparseable
  2310. information to disk. It was called incorrectly in several places,
  2311. in a way that could lead to excessive CPU usage. Fixes bug 40286;
  2312. bugfix on 0.2.2.1-alpha. This bug is also tracked as TROVE-2021-
  2313. 001 and CVE-2021-28089.
  2314. - Fix a bug in appending detached signatures to a pending consensus
  2315. document that could be used to crash a directory authority. Fixes
  2316. bug 40316; bugfix on 0.2.2.6-alpha. Tracked as TROVE-2021-002
  2317. and CVE-2021-28090.
  2318. o Minor features (geoip data):
  2319. - We have switched geoip data sources. Previously we shipped IP-to-
  2320. country mappings from Maxmind's GeoLite2, but in 2019 they changed
  2321. their licensing terms, so we were unable to update them after that
  2322. point. We now ship geoip files based on the IPFire Location
  2323. Database instead. (See https://location.ipfire.org/ for more
  2324. information). This release updates our geoip files to match the
  2325. IPFire Location Database as retrieved on 2021/03/12. Closes
  2326. ticket 40224.
  2327. o Minor bugfixes (directory authority):
  2328. - Now that exit relays don't allow exit connections to directory
  2329. authority DirPorts (to prevent network reentry), disable
  2330. authorities' reachability self test on the DirPort. Fixes bug
  2331. 40287; bugfix on 0.4.5.5-rc.
  2332. o Minor bugfixes (documentation):
  2333. - Fix a formatting error in the documentation for
  2334. VirtualAddrNetworkIPv6. Fixes bug 40256; bugfix on 0.2.9.4-alpha.
  2335. o Minor bugfixes (Linux, relay):
  2336. - Fix a bug in determining total available system memory that would
  2337. have been triggered if the format of Linux's /proc/meminfo file
  2338. had ever changed to include "MemTotal:" in the middle of a line.
  2339. Fixes bug 40315; bugfix on 0.2.5.4-alpha.
  2340. o Minor bugfixes (metrics port):
  2341. - Fix a BUG() warning on the MetricsPort for an internal missing
  2342. handler. Fixes bug 40295; bugfix on 0.4.5.1-alpha.
  2343. o Minor bugfixes (onion service):
  2344. - Remove a harmless BUG() warning when reloading tor configured with
  2345. onion services. Fixes bug 40334; bugfix on 0.4.5.1-alpha.
  2346. o Minor bugfixes (portability):
  2347. - Fix a non-portable usage of "==" with "test" in the configure
  2348. script. Fixes bug 40298; bugfix on 0.4.5.1-alpha.
  2349. o Minor bugfixes (relay):
  2350. - Remove a spammy log notice falsely claiming that the IPv4/v6
  2351. address was missing. Fixes bug 40300; bugfix on 0.4.5.1-alpha.
  2352. - Do not query the address cache early in the boot process when
  2353. deciding if a relay needs to fetch early directory information
  2354. from an authority. This bug resulted in a relay falsely believing
  2355. it didn't have an address and thus triggering an authority fetch
  2356. at each boot. Related to our fix for 40300.
  2357. o Removed features (mallinfo deprecated):
  2358. - Remove mallinfo() usage entirely. Libc 2.33+ now deprecates it.
  2359. Closes ticket 40309.
  2360. Changes in version 0.4.5.6 - 2021-02-15
  2361. The Tor 0.4.5.x release series is dedicated to the memory of Karsten
  2362. Loesing (1979-2020), Tor developer, cypherpunk, husband, and father.
  2363. Karsten is best known for creating the Tor metrics portal and leading
  2364. the metrics team, but he was involved in Tor from the early days. For
  2365. example, while he was still a student he invented and implemented the
  2366. v2 onion service directory design, and he also served as an ambassador
  2367. to the many German researchers working in the anonymity field. We
  2368. loved him and respected him for his patience, his consistency, and his
  2369. welcoming approach to growing our community.
  2370. This release series introduces significant improvements in relay IPv6
  2371. address discovery, a new "MetricsPort" mechanism for relay operators
  2372. to measure performance, LTTng support, build system improvements to
  2373. help when using Tor as a static library, and significant bugfixes
  2374. related to Windows relay performance. It also includes numerous
  2375. smaller features and bugfixes.
  2376. Below are the changes since 0.4.4.4-rc. For a complete list of changes
  2377. since 0.4.4.7, see the ReleaseNotes file.
  2378. o Major bugfixes (IPv6, relay):
  2379. - Fix a bug that prevented a relay from publishing its descriptor if
  2380. an auto-discovered IPv6 that was found unreachable. Fixes bug
  2381. 40279; bugfix on 0.4.5.1-alpha.
  2382. o Minor features (protocol versions):
  2383. - Stop claiming to support the "DirCache=1" subprotocol version.
  2384. Technically, we stopped supporting this subprotocol back in
  2385. 0.4.5.1-alpha, but we needed to wait for the authorities to stop
  2386. listing it as "required" before we could drop it from the list.
  2387. Closes ticket 40221.
  2388. o Minor bugfixes (logging):
  2389. - Avoid a spurious log message about missing subprotocol versions,
  2390. when the consensus that we're reading from is older than the
  2391. current release. Previously we had made this message nonfatal, but
  2392. in practice, it is never relevant when the consensus is older than
  2393. the current release. Fixes bug 40281; bugfix on 0.4.0.1-alpha.
  2394. o Minor bugfixes (metrics port):
  2395. - Fix a bug warning when a metrics port socket was unexpectedly
  2396. closed. Fixes bug 40257; bugfix on 0.4.5.1-alpha
  2397. o Minor bugfixes (relay):
  2398. - Allow relays to have a RFC1918 address if PublishServerDescriptor
  2399. is set to 0 and AssumeReachable is set to 1. This is to support
  2400. the use case of a bridge on a local network, exposed via a
  2401. pluggable transport. Fixes bug 40208; bugfix on 0.4.5.1-alpha.
  2402. o Minor bugfixes (relay, config):
  2403. - Fix a problem in the removal of duplicate ORPorts from the
  2404. internal port list when loading the config file. We were removing
  2405. the wrong ports, breaking valid torrc uses cases for multiple
  2406. ORPorts of the same address family. Fixes bug 40289; bugfix
  2407. on 0.4.5.1-alpha.
  2408. Changes in version 0.4.4.7 - 2021-02-03
  2409. Tor 0.4.4.7 backports numerous bugfixes from later releases,
  2410. including one that made v3 onion services more susceptible to
  2411. denial-of-service attacks, and a feature that makes some kinds of
  2412. DoS attacks harder to perform.
  2413. o Major bugfixes (onion service v3, backport from 0.4.5.3-rc):
  2414. - Stop requiring a live consensus for v3 clients and services, and
  2415. allow a "reasonably live" consensus instead. This allows v3 onion
  2416. services to work even if the authorities fail to generate a
  2417. consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
  2418. on 0.3.5.1-alpha.
  2419. o Major feature (exit, backport from 0.4.5.5-rc):
  2420. - Re-entry into the network is now denied at the Exit level to all
  2421. relays' ORPorts and authorities' ORPorts and DirPorts. This change
  2422. should help mitgate a set of denial-of-service attacks. Closes
  2423. ticket 2667.
  2424. o Minor feature (build system, backport from 0.4.5.4-rc):
  2425. - New "make lsp" command to generate the compile_commands.json file
  2426. used by the ccls language server. The "bear" program is needed for
  2427. this. Closes ticket 40227.
  2428. o Minor features (compilation, backport from 0.4.5.2-rc):
  2429. - Disable deprecation warnings when building with OpenSSL 3.0.0 or
  2430. later. There are a number of APIs newly deprecated in OpenSSL
  2431. 3.0.0 that Tor still requires. (A later version of Tor will try to
  2432. stop depending on these APIs.) Closes ticket 40165.
  2433. o Minor features (crypto, backport from 0.4.5.3-rc):
  2434. - Fix undefined behavior on our Keccak library. The bug only
  2435. appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
  2436. and would result in wrong digests. Fixes bug 40210; bugfix on
  2437. 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
  2438. weasel for diagnosing this.
  2439. o Minor bugfixes (compatibility, backport from 0.4.5.1-rc):
  2440. - Strip '\r' characters when reading text files on Unix platforms.
  2441. This should resolve an issue where a relay operator migrates a
  2442. relay from Windows to Unix, but does not change the line ending of
  2443. Tor's various state files to match the platform, and the CRLF line
  2444. endings from Windows end up leaking into other files such as the
  2445. extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.
  2446. o Minor bugfixes (compilation, backport from 0.4.5.3-rc):
  2447. - Fix a compilation warning about unreachable fallthrough
  2448. annotations when building with "--enable-all-bugs-are-fatal" on
  2449. some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.
  2450. o Minor bugfixes (SOCKS5, backport from 0.4.5.3-rc):
  2451. - Handle partial SOCKS5 messages correctly. Previously, our code
  2452. would send an incorrect error message if it got a SOCKS5 request
  2453. that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.
  2454. o Minor bugfixes (testing, backport from 0.4.5.2-alpha):
  2455. - Fix the `config/parse_tcp_proxy_line` test so that it works
  2456. correctly on systems where the DNS provider hijacks invalid
  2457. queries. Fixes part of bug 40179; bugfix on 0.4.3.1-alpha.
  2458. - Fix our Python reference-implementation for the v3 onion service
  2459. handshake so that it works correctly with the version of hashlib
  2460. provided by Python 3.9. Fixes part of bug 40179; bugfix
  2461. on 0.3.1.6-rc.
  2462. - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
  2463. 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.
  2464. Changes in version 0.4.3.8 - 2021-02-03
  2465. Tor 0.4.3.8 backports numerous bugfixes from later releases,
  2466. including one that made v3 onion services more susceptible to
  2467. denial-of-service attacks, and a feature that makes some kinds of
  2468. DoS attacks harder to perform.
  2469. Note that this is, in all likelihood, the last release of Tor 0.4.3.x,
  2470. which will reach end-of-life on 15 Feb 2021.
  2471. o Major bugfixes (onion service v3, backport from 0.4.5.3-rc):
  2472. - Stop requiring a live consensus for v3 clients and services, and
  2473. allow a "reasonably live" consensus instead. This allows v3 onion
  2474. services to work even if the authorities fail to generate a
  2475. consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
  2476. on 0.3.5.1-alpha.
  2477. o Major bugfixes (stats, onion services, backport from 0.4.4.5):
  2478. - Fix a bug where we were undercounting the Tor network's total
  2479. onion service traffic, by ignoring any traffic originating from
  2480. clients. Now we count traffic from both clients and services.
  2481. Fixes bug 40117; bugfix on 0.2.6.2-alpha.
  2482. o Major feature (exit, backport from 0.4.5.5-rc):
  2483. - Re-entry into the network is now denied at the Exit level to all
  2484. relays' ORPorts and authorities' ORPorts and DirPorts. This change
  2485. should help mitgate a set of denial-of-service attacks. Closes
  2486. ticket 2667.
  2487. o Minor feature (build system, backport from 0.4.5.4-rc):
  2488. - New "make lsp" command to generate the compile_commands.json file
  2489. used by the ccls language server. The "bear" program is needed for
  2490. this. Closes ticket 40227.
  2491. o Minor features (compilation, backport from 0.4.5.2-rc):
  2492. - Disable deprecation warnings when building with OpenSSL 3.0.0 or
  2493. later. There are a number of APIs newly deprecated in OpenSSL
  2494. 3.0.0 that Tor still requires. (A later version of Tor will try to
  2495. stop depending on these APIs.) Closes ticket 40165.
  2496. o Minor features (crypto, backport from 0.4.5.3-rc):
  2497. - Fix undefined behavior on our Keccak library. The bug only
  2498. appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
  2499. and would result in wrong digests. Fixes bug 40210; bugfix on
  2500. 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
  2501. weasel for diagnosing this.
  2502. o Minor bugfixes (compatibility, backport from 0.4.5.1-rc):
  2503. - Strip '\r' characters when reading text files on Unix platforms.
  2504. This should resolve an issue where a relay operator migrates a
  2505. relay from Windows to Unix, but does not change the line ending of
  2506. Tor's various state files to match the platform, and the CRLF line
  2507. endings from Windows end up leaking into other files such as the
  2508. extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.
  2509. o Minor bugfixes (compilation, backport from 0.4.5.1-rc):
  2510. - Resolve a compilation warning that could occur in
  2511. test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
  2512. o Minor bugfixes (compilation, backport from 0.4.5.3-rc):
  2513. - Fix a compilation warning about unreachable fallthrough
  2514. annotations when building with "--enable-all-bugs-are-fatal" on
  2515. some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.
  2516. o Minor bugfixes (SOCKS5, backport from 0.4.5.3-rc):
  2517. - Handle partial SOCKS5 messages correctly. Previously, our code
  2518. would send an incorrect error message if it got a SOCKS5 request
  2519. that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.
  2520. o Minor bugfixes (testing, backport from 0.4.5.2-alpha):
  2521. - Fix the `config/parse_tcp_proxy_line` test so that it works
  2522. correctly on systems where the DNS provider hijacks invalid
  2523. queries. Fixes part of bug 40179; bugfix on 0.4.3.1-alpha.
  2524. - Fix our Python reference-implementation for the v3 onion service
  2525. handshake so that it works correctly with the version of hashlib
  2526. provided by Python 3.9. Fixes part of bug 40179; bugfix
  2527. on 0.3.1.6-rc.
  2528. - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
  2529. 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.
  2530. Changes in version 0.3.5.13 - 2020-02-03
  2531. Tor 0.3.5.13 backports numerous bugfixes from later releases,
  2532. including one that made v3 onion services more susceptible to
  2533. denial-of-service attacks, and a feature that makes some kinds of
  2534. DoS attacks harder to perform.
  2535. o Major bugfixes (onion service v3, backport from 0.4.5.3-rc):
  2536. - Stop requiring a live consensus for v3 clients and services, and
  2537. allow a "reasonably live" consensus instead. This allows v3 onion
  2538. services to work even if the authorities fail to generate a
  2539. consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
  2540. on 0.3.5.1-alpha.
  2541. o Major bugfixes (stats, onion services, backport from 0.4.4.5):
  2542. - Fix a bug where we were undercounting the Tor network's total
  2543. onion service traffic, by ignoring any traffic originating from
  2544. clients. Now we count traffic from both clients and services.
  2545. Fixes bug 40117; bugfix on 0.2.6.2-alpha.
  2546. o Major feature (exit, backport from 0.4.5.5-rc):
  2547. - Re-entry into the network is now denied at the Exit level to all
  2548. relays' ORPorts and authorities' ORPorts and DirPorts. This change
  2549. should help mitigate a set of denial-of-service attacks. Closes
  2550. ticket 2667.
  2551. o Minor feature (build system, backport from 0.4.5.4-rc):
  2552. - New "make lsp" command to generate the compile_commands.json file
  2553. used by the ccls language server. The "bear" program is needed for
  2554. this. Closes ticket 40227.
  2555. o Minor features (compilation, backport from 0.4.5.2-rc):
  2556. - Disable deprecation warnings when building with OpenSSL 3.0.0 or
  2557. later. There are a number of APIs newly deprecated in OpenSSL
  2558. 3.0.0 that Tor still requires. (A later version of Tor will try to
  2559. stop depending on these APIs.) Closes ticket 40165.
  2560. o Minor features (crypto, backport from 0.4.5.3-rc):
  2561. - Fix undefined behavior on our Keccak library. The bug only
  2562. appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
  2563. and would result in wrong digests. Fixes bug 40210; bugfix on
  2564. 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
  2565. weasel for diagnosing this.
  2566. o Minor bugfixes (compatibility, backport from 0.4.5.1-rc):
  2567. - Strip '\r' characters when reading text files on Unix platforms.
  2568. This should resolve an issue where a relay operator migrates a
  2569. relay from Windows to Unix, but does not change the line ending of
  2570. Tor's various state files to match the platform, and the CRLF line
  2571. endings from Windows end up leaking into other files such as the
  2572. extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.
  2573. o Minor bugfixes (compilation, backport from 0.4.5.1-rc):
  2574. - Resolve a compilation warning that could occur in
  2575. test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
  2576. o Minor bugfixes (compilation, backport from 0.4.5.3-rc):
  2577. - Fix a compilation warning about unreachable fallthrough
  2578. annotations when building with "--enable-all-bugs-are-fatal" on
  2579. some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.
  2580. o Minor bugfixes (SOCKS5, backport from 0.4.5.3-rc):
  2581. - Handle partial SOCKS5 messages correctly. Previously, our code
  2582. would send an incorrect error message if it got a SOCKS5 request
  2583. that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.
  2584. o Minor bugfixes (testing, backport from 0.4.5.2-alpha):
  2585. - Fix our Python reference-implementation for the v3 onion service
  2586. handshake so that it works correctly with the version of hashlib
  2587. provided by Python 3.9. Fixes part of bug 40179; bugfix
  2588. on 0.3.1.6-rc.
  2589. - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
  2590. 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.
  2591. Changes in version 0.4.5.5-rc - 2021-02-01
  2592. Tor 0.4.5.5-rc is the third release candidate in its series. We're
  2593. coming closer and closer to a stable release series. This release
  2594. fixes an annoyance with address detection code, and somewhat mitigates
  2595. an ongoing denial-of-service attack.
  2596. We anticipate no more code changes between this and the stable
  2597. release, though of course that could change.
  2598. o Major feature (exit):
  2599. - Re-entry into the network is now denied at the Exit level to all
  2600. relays' ORPorts and authorities' ORPorts and DirPorts. This change
  2601. should help mitgate a set of denial-of-service attacks. Closes
  2602. ticket 2667.
  2603. o Minor bugfixes (relay, configuration):
  2604. - Don't attempt to discover our address (IPv4 or IPv6) if no ORPort
  2605. for it can be found in the configuration. Fixes bug 40254; bugfix
  2606. on 0.4.5.1-alpha.
  2607. Changes in version 0.4.5.4-rc - 2021-01-22
  2608. Tor 0.4.5.4-rc is the second release candidate in its series. It fixes
  2609. several bugs present in previous releases.
  2610. We expect that the stable release will be the same, or almost the
  2611. same, as this release candidate, unless serious bugs are found.
  2612. o Major bugfixes (authority, IPv6):
  2613. - Do not consider multiple relays in the same IPv6 /64 network to be
  2614. sybils. Fixes bug 40243; bugfix on 0.4.5.1-alpha.
  2615. o Major bugfixes (directory cache, performance, windows):
  2616. - Limit the number of items in the consensus diff cache to 64 on
  2617. Windows. We hope this will mitigate an issue where Windows relay
  2618. operators reported Tor using 100% CPU, while we investigate better
  2619. solutions. Fixes bug 24857; bugfix on 0.3.1.1-alpha.
  2620. o Minor feature (build system):
  2621. - New "make lsp" command to generate the compile_commands.json file
  2622. used by the ccls language server. The "bear" program is needed for
  2623. this. Closes ticket 40227.
  2624. o Minor features (authority, logging):
  2625. - Log more information for directory authority operators during the
  2626. consensus voting process, and while processing relay descriptors.
  2627. Closes ticket 40245.
  2628. - Reject obsolete router/extrainfo descriptors earlier and more
  2629. quietly, to avoid spamming the logs. Fixes bug 40238; bugfix
  2630. on 0.4.5.1-alpha.
  2631. o Minor bugfixes (compilation):
  2632. - Fix another warning about unreachable fallthrough annotations when
  2633. building with "--enable-all-bugs-are-fatal" on some compilers.
  2634. Fixes bug 40241; bugfix on 0.4.5.3-rc.
  2635. - Change the linker flag ordering in our library search code so that
  2636. it works for compilers that need the libraries to be listed in the
  2637. right order. Fixes bug 33624; bugfix on 0.1.1.0-alpha.
  2638. o Minor bugfixes (config, bridge):
  2639. - Don't initiate a connection to a bridge configured to use a
  2640. missing transport. This change reverts an earlier fix that would
  2641. try to avoid such situations during configuration chcecking, but
  2642. which doesn't work with DisableNetwork. Fixes bug 40106; bugfix
  2643. on 0.4.5.1-alpha.
  2644. o Minor bugfixes (onion services):
  2645. - Avoid a non-fatal assertion in certain edge-cases when
  2646. establishing a circuit to an onion service. Fixes bug 32666;
  2647. bugfix on 0.3.0.3-alpha.
  2648. o Minor bugfixes (relay):
  2649. - If we were unable to build our descriptor, don't mark it as having
  2650. been advertised. Also remove an harmless BUG(). Fixes bug 40231;
  2651. bugfix on 0.4.5.1-alpha.
  2652. Changes in version 0.4.5.3-rc - 2021-01-12
  2653. Tor 0.4.5.3-rc is the first release candidate in its series. It fixes
  2654. several bugs, including one that broke onion services on certain older
  2655. ARM CPUs, and another that made v3 onion services less reliable.
  2656. Though we anticipate that we'll be doing a bit more clean-up between
  2657. now and the stable release, we expect that our remaining changes will
  2658. be fairly simple. There will be at least one more release candidate
  2659. before 0.4.5.x is stable.
  2660. o Major bugfixes (onion service v3):
  2661. - Stop requiring a live consensus for v3 clients and services, and
  2662. allow a "reasonably live" consensus instead. This allows v3 onion
  2663. services to work even if the authorities fail to generate a
  2664. consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
  2665. on 0.3.5.1-alpha.
  2666. o Minor features (crypto):
  2667. - Fix undefined behavior on our Keccak library. The bug only
  2668. appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
  2669. and would result in wrong digests. Fixes bug 40210; bugfix on
  2670. 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
  2671. weasel for diagnosing this.
  2672. o Minor features (documentation):
  2673. - Mention the "!badexit" directive that can appear in an authority's
  2674. approved-routers file, and update the description of the
  2675. "!invalid" directive. Closes ticket 40188.
  2676. o Minor bugfixes (compilation):
  2677. - Fix a compilation warning about unreachable fallthrough
  2678. annotations when building with "--enable-all-bugs-are-fatal" on
  2679. some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.
  2680. - Fix the "--enable-static-tor" switch to properly set the "-static"
  2681. compile option onto the tor binary only. Fixes bug 40111; bugfix
  2682. on 0.2.3.1-alpha.
  2683. o Minor bugfixes (config, bridge):
  2684. - Really fix the case where torrc has a missing ClientTransportPlugin
  2685. but is configured with a Bridge line and UseBridges. Previously,
  2686. we didn't look at the managed proxy list and thus would fail for
  2687. the "exec" case. Fixes bug 40106; bugfix on 0.4.5.1-alpha.
  2688. o Minor bugfixes (logging, relay):
  2689. - Log our address as reported by the directory authorities, if none
  2690. was configured or detected before. Fixes bug 40201; bugfix
  2691. on 0.4.5.1-alpha.
  2692. - When a launching bandwidth testing circuit, don't incorrectly call
  2693. it a reachability test, or trigger a "CHECKING_REACHABILITY"
  2694. control event. Fixes bug 40205; bugfix on 0.4.5.1-alpha.
  2695. o Minor bugfixes (relay, statistics):
  2696. - Report the correct connection statistics in our extrainfo
  2697. documents. Previously there was a problem in the file loading
  2698. function which would wrongly truncate a state file, causing the
  2699. wrong information to be reported. Fixes bug 40226; bugfix
  2700. on 0.4.5.1-alpha.
  2701. o Minor bugfixes (SOCKS5):
  2702. - Handle partial SOCKS5 messages correctly. Previously, our code
  2703. would send an incorrect error message if it got a SOCKS5 request
  2704. that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.
  2705. Changes in version 0.4.5.2-alpha - 2020-11-23
  2706. Tor 0.4.5.2-alpha is the second alpha release in the 0.4.5.x series.
  2707. It fixes several bugs present in earlier releases, including one that
  2708. made it impractical to run relays on Windows. It also adds a few small
  2709. safety features to improve Tor's behavior in the presence of strange
  2710. compile-time options, misbehaving proxies, and future versions
  2711. of OpenSSL.
  2712. o Major bugfixes (relay, windows):
  2713. - Fix a bug in our implementation of condition variables on Windows.
  2714. Previously, a relay on Windows would use 100% CPU after running
  2715. for some time. Because of this change, Tor now require Windows
  2716. Vista or later to build and run. Fixes bug 30187; bugfix on
  2717. 0.2.6.3-alpha. (This bug became more serious in 0.3.1.1-alpha with
  2718. the introduction of consensus diffs.) Patch by Daniel Pinto.
  2719. o Minor features (compilation):
  2720. - Disable deprecation warnings when building with OpenSSL 3.0.0 or
  2721. later. There are a number of APIs newly deprecated in OpenSSL
  2722. 3.0.0 that Tor still requires. (A later version of Tor will try to
  2723. stop depending on these APIs.) Closes ticket 40165.
  2724. o Minor features (protocol, proxy support, defense in depth):
  2725. - Respond more deliberately to misbehaving proxies that leave
  2726. leftover data on their connections, so as to make Tor even less
  2727. likely to allow the proxies to pass their data off as having come
  2728. from a relay. Closes ticket 40017.
  2729. o Minor features (safety):
  2730. - Log a warning at startup if Tor is built with compile-time options
  2731. that are likely to make it less stable or reliable. Closes
  2732. ticket 18888.
  2733. o Minor bugfixes (circuit, handshake):
  2734. - In the v3 handshaking code, use connection_or_change_state() to
  2735. change the state. Previously, we changed the state directly, but
  2736. this did not pass the state change to the pubsub or channel
  2737. objects, potentially leading to bugs. Fixes bug 32880; bugfix on
  2738. 0.2.3.6-alpha. Patch by Neel Chauhan.
  2739. o Minor bugfixes (compilation):
  2740. - Use the correct 'ranlib' program when building libtor.a.
  2741. Previously we used the default ranlib, which broke some kinds of
  2742. cross-compilation. Fixes bug 40172; bugfix on 0.4.5.1-alpha.
  2743. - Remove a duplicate typedef in metrics_store.c. Fixes bug 40177;
  2744. bugfix on 0.4.5.1-alpha.
  2745. - When USDT tracing is enabled, and STAP_PROBEV() is missing, don't
  2746. attempt to build. Linux supports that macro but not the BSDs.
  2747. Fixes bug 40174; bugfix on 0.4.5.1-alpha.
  2748. o Minor bugfixes (configuration):
  2749. - Exit Tor on a misconfiguration when the Bridge line is configured
  2750. to use a transport but no corresponding ClientTransportPlugin can
  2751. be found. Prior to this fix, Tor would attempt to connect to the
  2752. bridge directly without using the transport, making it easier for
  2753. adversaries to notice the bridge. Fixes bug 25528; bugfix
  2754. on 0.2.6.1-alpha.
  2755. - Fix an issue where an ORPort was compared with other kinds of
  2756. ports, when it should have been only checked against other
  2757. ORPorts. This bug would lead to "DirPort auto" getting ignored.
  2758. Fixes bug 40195; bugfix on 0.4.5.1-alpha.
  2759. - Fix a bug where a second non-ORPort with a variant family (ex:
  2760. SocksPort [::1]:9050) would be ignored due to a configuration
  2761. parsing error. Fixes bug 40183; bugfix on 0.4.5.1-alpha.
  2762. o Minor bugfixes (crash, relay, signing key):
  2763. - Avoid assertion failures when we run Tor from the command line
  2764. with `--key-expiration sign`, but an ORPort is not set. Fixes bug
  2765. 40015; bugfix on 0.3.2.1-alpha. Patch by Neel Chauhan.
  2766. o Minor bugfixes (logging):
  2767. - Remove trailing whitespace from control event log messages. Fixes
  2768. bug 32178; bugfix on 0.1.1.1-alpha. Based on a patch by
  2769. Amadeusz Pawlik.
  2770. - Turn warning-level log message about SENDME failure into a debug-
  2771. level message. (This event can happen naturally, and is no reason
  2772. for concern). Fixes bug 40142; bugfix on 0.4.1.1-alpha.
  2773. o Minor bugfixes (relay, address discovery):
  2774. - Don't trigger an IP change when no new valid IP can be found.
  2775. Fixes bug 40071; bugfix on 0.4.5.1-alpha.
  2776. - When attempting to discover our IP, use a simple test circuit,
  2777. rather than a descriptor fetch: the same address information is
  2778. present in NETINFO cells, and is better authenticated there. Fixes
  2779. bug 40071; bugfix on 0.4.5.1-alpha.
  2780. o Minor bugfixes (testing):
  2781. - Fix the `config/parse_tcp_proxy_line` test so that it works
  2782. correctly on systems where the DNS provider hijacks invalid
  2783. queries. Fixes part of bug 40179; bugfix on 0.4.3.1-alpha.
  2784. - Fix unit tests that used newly generated list of routers so that
  2785. they check them with respect to the date when they were generated,
  2786. not with respect to the current time. Fixes bug 40187; bugfix
  2787. on 0.4.5.1-alpha.
  2788. - Fix our Python reference-implementation for the v3 onion service
  2789. handshake so that it works correctly with the version of hashlib
  2790. provided by Python 3.9. Fixes part of bug 40179; bugfix
  2791. on 0.3.1.6-rc.
  2792. - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
  2793. 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.
  2794. o Removed features (controller):
  2795. - Remove the "GETINFO network-status" controller command. It has
  2796. been deprecated since 0.3.1.1-alpha. Closes ticket 22473.
  2797. Changes in version 0.4.4.6 - 2020-11-12
  2798. Tor 0.4.4.6 is the second stable release in the 0.4.4.x series. It
  2799. backports fixes from later releases, including a fix for TROVE-2020-
  2800. 005, a security issue that could be used, under certain cases, by an
  2801. adversary to observe traffic patterns on a limited number of circuits
  2802. intended for a different relay.
  2803. o Major bugfixes (security, backport from 0.4.5.1-alpha):
  2804. - When completing a channel, relays now check more thoroughly to
  2805. make sure that it matches any pending circuits before attaching
  2806. those circuits. Previously, address correctness and Ed25519
  2807. identities were not checked in this case, but only when extending
  2808. circuits on an existing channel. Fixes bug 40080; bugfix on
  2809. 0.2.7.2-alpha. Resolves TROVE-2020-005.
  2810. o Minor features (directory authorities, backport from 0.4.5.1-alpha):
  2811. - Authorities now list a different set of protocols as required and
  2812. recommended. These lists have been chosen so that only truly
  2813. recommended and/or required protocols are included, and so that
  2814. clients using 0.2.9 or later will continue to work (even though
  2815. they are not supported), whereas only relays running 0.3.5 or
  2816. later will meet the requirements. Closes ticket 40162.
  2817. - Make it possible to specify multiple ConsensusParams torrc lines.
  2818. Now directory authority operators can for example put the main
  2819. ConsensusParams config in one torrc file and then add to it from a
  2820. different torrc file. Closes ticket 40164.
  2821. o Minor features (subprotocol versions, backport from 0.4.5.1-alpha):
  2822. - Tor no longer allows subprotocol versions larger than 63.
  2823. Previously version numbers up to UINT32_MAX were allowed, which
  2824. significantly complicated our code. Implements proposal 318;
  2825. closes ticket 40133.
  2826. o Minor features (tests, v2 onion services, backport from 0.4.5.1-alpha):
  2827. - Fix a rendezvous cache unit test that was triggering an underflow
  2828. on the global rend cache allocation. Fixes bug 40125; bugfix
  2829. on 0.2.8.1-alpha.
  2830. - Fix another rendezvous cache unit test that was triggering an
  2831. underflow on the global rend cache allocation. Fixes bug 40126;
  2832. bugfix on 0.2.8.1-alpha.
  2833. o Minor bugfixes (compilation, backport from 0.4.5.1-alpha):
  2834. - Fix compiler warnings that would occur when building with
  2835. "--enable-all-bugs-are-fatal" and "--disable-module-relay" at the
  2836. same time. Fixes bug 40129; bugfix on 0.4.4.1-alpha.
  2837. - Resolve a compilation warning that could occur in
  2838. test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
  2839. o Minor bugfixes (logging, backport from 0.4.5.1-alpha):
  2840. - Remove a debug logging statement that uselessly spammed the logs.
  2841. Fixes bug 40135; bugfix on 0.3.5.0-alpha.
  2842. o Minor bugfixes (relay configuration, crash, backport from 0.4.5.1-alpha):
  2843. - Avoid a fatal assert() when failing to create a listener
  2844. connection for an address that was in use. Fixes bug 40073; bugfix
  2845. on 0.3.5.1-alpha.
  2846. o Minor bugfixes (v2 onion services, backport from 0.4.5.1-alpha):
  2847. - For HSFETCH commands on v2 onion services addresses, check the
  2848. length of bytes decoded, not the base32 length. Fixes bug 34400;
  2849. bugfix on 0.4.1.1-alpha. Patch by Neel Chauhan.
  2850. Changes in version 0.4.3.7 - 2020-11-12
  2851. Tor 0.4.3.7 backports several bugfixes from later releases. It
  2852. includes a fix for TROVE-2020-005, a security issue that could be
  2853. used, under certain cases, by an adversary to observe traffic patterns
  2854. on a limited number of circuits intended for a different relay.
  2855. Please be aware that support for the 0.4.3.x series will end on 15
  2856. February 2021. Please upgrade to 0.4.4.x or 0.4.5.x before then, or
  2857. downgrade to 0.3.5.x, which will be supported until at least 1
  2858. February 2022.
  2859. o Major features (fallback directory list, backport form 0.4.4.3-alpha):
  2860. - Replace the 148 fallback directories originally included in Tor
  2861. 0.4.1.4-rc (of which around 105 are still functional) with a list
  2862. of 144 fallbacks generated in July 2020. Closes ticket 40061.
  2863. o Major bugfixes (security, backport from 0.4.5.1-alpha):
  2864. - When completing a channel, relays now check more thoroughly to
  2865. make sure that it matches any pending circuits before attaching
  2866. those circuits. Previously, address correctness and Ed25519
  2867. identities were not checked in this case, but only when extending
  2868. circuits on an existing channel. Fixes bug 40080; bugfix on
  2869. 0.2.7.2-alpha. Resolves TROVE-2020-005.
  2870. o Major bugfixes (NSS, backport from 0.4.4.3-alpha):
  2871. - When running with NSS enabled, make sure that NSS knows to expect
  2872. nonblocking sockets. Previously, we set our TCP sockets as
  2873. nonblocking, but did not tell NSS, which in turn could lead to
  2874. unexpected blocking behavior. Fixes bug 40035; bugfix
  2875. on 0.3.5.1-alpha.
  2876. o Minor features (security, backport from 0.4.4.4-rc):
  2877. - Channels using obsolete versions of the Tor link protocol are no
  2878. longer allowed to circumvent address-canonicity checks. (This is
  2879. only a minor issue, since such channels have no way to set ed25519
  2880. keys, and therefore should always be rejected for circuits that
  2881. specify ed25519 identities.) Closes ticket 40081.
  2882. o Minor features (subprotocol versions, backport from 0.4.5.1-alpha):
  2883. - Tor no longer allows subprotocol versions larger than 63.
  2884. Previously version numbers up to UINT32_MAX were allowed, which
  2885. significantly complicated our code. Implements proposal 318;
  2886. closes ticket 40133.
  2887. o Minor features (tests, backport from 0.4.4.5):
  2888. - Our "make check" target now runs the unit tests in 8 parallel
  2889. chunks. Doing this speeds up hardened CI builds by more than a
  2890. factor of two. Closes ticket 40098.
  2891. o Minor features (tests, v2 onion services, backport from 0.4.5.1-alpha):
  2892. - Fix a rendezvous cache unit test that was triggering an underflow
  2893. on the global rend cache allocation. Fixes bug 40125; bugfix
  2894. on 0.2.8.1-alpha.
  2895. - Fix another rendezvous cache unit test that was triggering an
  2896. underflow on the global rend cache allocation. Fixes bug 40126;
  2897. bugfix on 0.2.8.1-alpha.
  2898. o Minor bugfixes (correctness, buffers, backport from 0.4.4.4-rc):
  2899. - Fix a correctness bug that could cause an assertion failure if we
  2900. ever tried using the buf_move_all() function with an empty input
  2901. buffer. As far as we know, no released versions of Tor do this.
  2902. Fixes bug 40076; bugfix on 0.3.3.1-alpha.
  2903. o Minor bugfixes (logging, backport from 0.4.5.1-alpha):
  2904. - Remove a debug logging statement that uselessly spammed the logs.
  2905. Fixes bug 40135; bugfix on 0.3.5.0-alpha.
  2906. o Minor bugfixes (rate limiting, bridges, pluggable transports, backport from 0.4.4.4-rc):
  2907. - On a bridge, treat all connections from an ExtORPort as remote by
  2908. default for the purposes of rate-limiting. Previously, bridges
  2909. would treat the connection as local unless they explicitly
  2910. received a "USERADDR" command. ExtORPort connections still count
  2911. as local if there is a USERADDR command with an explicit local
  2912. address. Fixes bug 33747; bugfix on 0.2.5.1-alpha.
  2913. o Minor bugfixes (relay configuration, crash, backport from 0.4.5.1-alpha):
  2914. - Avoid a fatal assert() when failing to create a listener
  2915. connection for an address that was in use. Fixes bug 40073; bugfix
  2916. on 0.3.5.1-alpha.
  2917. o Minor bugfixes (relay, usability, backport from 0.4.4.3-alpha):
  2918. - Adjust the rules for when to warn about having too many
  2919. connections to other relays. Previously we'd tolerate up to 1.5
  2920. connections per relay on average. Now we tolerate more connections
  2921. for directory authorities, and raise the number of total
  2922. connections we need to see before we warn. Fixes bug 33880; bugfix
  2923. on 0.3.1.1-alpha.
  2924. o Minor bugfixes (tests, 0.4.4.5):
  2925. - Fix the behavior of the rend_cache/clean_v2_descs_as_dir when run
  2926. on its own. Previously, it would exit with an error. Fixes bug
  2927. 40099; bugfix on 0.2.8.1-alpha.
  2928. o Minor bugfixes (v2 onion services, backport from 0.4.5.1-alpha):
  2929. - For HSFETCH commands on v2 onion services addresses, check the
  2930. length of bytes decoded, not the base32 length. Fixes bug 34400;
  2931. bugfix on 0.4.1.1-alpha. Patch by Neel Chauhan.
  2932. o Minor bugfixes (windows, backport from 0.4.4.4-rc):
  2933. - Fix a bug that prevented Tor from starting if its log file grew
  2934. above 2GB. Fixes bug 31036; bugfix on 0.2.1.8-alpha.
  2935. o Deprecated features (onion service v2, backport form 0.4.4.2-alpha):
  2936. - Add a deprecation warning for version 2 onion services. Closes
  2937. ticket 40003.
  2938. o Removed features (backport from 0.4.4.3-alpha):
  2939. - Our "check-local" test target no longer tries to use the
  2940. Coccinelle semantic patching tool parse all the C files. While it
  2941. is a good idea to try to make sure Coccinelle works on our C
  2942. before we run a Coccinelle patch, doing so on every test run has
  2943. proven to be disruptive. You can still run this tool manually with
  2944. "make check-cocci". Closes ticket 40030. ticket 40030.
  2945. Changes in version 0.3.5.12 - 2020-11-12
  2946. Tor 0.4.3.7 backports several bugfixes from later releases. It
  2947. includes a fix for TROVE-2020-005, a security issue that could be
  2948. used, under certain cases, by an adversary to observe traffic patterns
  2949. on a limited number of circuits intended for a different relay.
  2950. o Major features (fallback directory list, backport form 0.4.4.3-alpha):
  2951. - Replace the 148 fallback directories originally included in Tor
  2952. 0.4.1.4-rc (of which around 105 are still functional) with a list
  2953. of 144 fallbacks generated in July 2020. Closes ticket 40061.
  2954. o Major bugfixes (security, backport from 0.4.5.1-alpha):
  2955. - When completing a channel, relays now check more thoroughly to
  2956. make sure that it matches any pending circuits before attaching
  2957. those circuits. Previously, address correctness and Ed25519
  2958. identities were not checked in this case, but only when extending
  2959. circuits on an existing channel. Fixes bug 40080; bugfix on
  2960. 0.2.7.2-alpha. Resolves TROVE-2020-005.
  2961. o Major bugfixes (NSS, backport from 0.4.4.3-alpha):
  2962. - When running with NSS enabled, make sure that NSS knows to expect
  2963. nonblocking sockets. Previously, we set our TCP sockets as
  2964. nonblocking, but did not tell NSS, which in turn could lead to
  2965. unexpected blocking behavior. Fixes bug 40035; bugfix
  2966. on 0.3.5.1-alpha.
  2967. o Minor features (security, backport from 0.4.4.4-rc):
  2968. - Channels using obsolete versions of the Tor link protocol are no
  2969. longer allowed to circumvent address-canonicity checks. (This is
  2970. only a minor issue, since such channels have no way to set ed25519
  2971. keys, and therefore should always be rejected for circuits that
  2972. specify ed25519 identities.) Closes ticket 40081.
  2973. o Minor features (debugging, directory system):
  2974. - Don't crash when we find a non-guard with a guard-fraction value
  2975. set. Instead, log a bug warning, in an attempt to figure out how
  2976. this happened. Diagnostic for ticket 32868.
  2977. o Minor features (subprotocol versions, backport from 0.4.5.1-alpha):
  2978. - Tor no longer allows subprotocol versions larger than 63.
  2979. Previously version numbers up to UINT32_MAX were allowed, which
  2980. significantly complicated our code. Implements proposal 318;
  2981. closes ticket 40133.
  2982. o Minor features (tests, backport from 0.4.4.5):
  2983. - Our "make check" target now runs the unit tests in 8 parallel
  2984. chunks. Doing this speeds up hardened CI builds by more than a
  2985. factor of two. Closes ticket 40098.
  2986. o Minor features (tests, v2 onion services, backport from 0.4.5.1-alpha):
  2987. - Fix a rendezvous cache unit test that was triggering an underflow
  2988. on the global rend cache allocation. Fixes bug 40125; bugfix
  2989. on 0.2.8.1-alpha.
  2990. - Fix another rendezvous cache unit test that was triggering an
  2991. underflow on the global rend cache allocation. Fixes bug 40126;
  2992. bugfix on 0.2.8.1-alpha.
  2993. o Minor bugfixes (correctness, buffers, backport from 0.4.4.4-rc):
  2994. - Fix a correctness bug that could cause an assertion failure if we
  2995. ever tried using the buf_move_all() function with an empty input
  2996. buffer. As far as we know, no released versions of Tor do this.
  2997. Fixes bug 40076; bugfix on 0.3.3.1-alpha.
  2998. o Minor bugfixes (logging, backport from 0.4.5.1-alpha):
  2999. - Remove a debug logging statement that uselessly spammed the logs.
  3000. Fixes bug 40135; bugfix on 0.3.5.0-alpha.
  3001. o Minor bugfixes (rate limiting, bridges, pluggable transports, backport from 0.4.4.4-rc):
  3002. - On a bridge, treat all connections from an ExtORPort as remote by
  3003. default for the purposes of rate-limiting. Previously, bridges
  3004. would treat the connection as local unless they explicitly
  3005. received a "USERADDR" command. ExtORPort connections still count
  3006. as local if there is a USERADDR command with an explicit local
  3007. address. Fixes bug 33747; bugfix on 0.2.5.1-alpha.
  3008. o Minor bugfixes (relay configuration, crash, backport from 0.4.5.1-alpha):
  3009. - Avoid a fatal assert() when failing to create a listener
  3010. connection for an address that was in use. Fixes bug 40073; bugfix
  3011. on 0.3.5.1-alpha.
  3012. o Minor bugfixes (relay, usability, backport from 0.4.4.3-alpha):
  3013. - Adjust the rules for when to warn about having too many
  3014. connections to other relays. Previously we'd tolerate up to 1.5
  3015. connections per relay on average. Now we tolerate more connections
  3016. for directory authorities, and raise the number of total
  3017. connections we need to see before we warn. Fixes bug 33880; bugfix
  3018. on 0.3.1.1-alpha.
  3019. o Minor bugfixes (relays, backport from 0.4.4.1-alpha):
  3020. - Stop advertising incorrect IPv6 ORPorts in relay and bridge
  3021. descriptors, when the IPv6 port was configured as "auto". Fixes
  3022. bug 32588; bugfix on 0.2.3.9-alpha.
  3023. o Minor bugfixes (tests, 0.4.4.5):
  3024. - Fix the behavior of the rend_cache/clean_v2_descs_as_dir when run
  3025. on its own. Previously, it would exit with an error. Fixes bug
  3026. 40099; bugfix on 0.2.8.1-alpha.
  3027. o Minor bugfixes (windows, backport from 0.4.4.4-rc):
  3028. - Fix a bug that prevented Tor from starting if its log file grew
  3029. above 2GB. Fixes bug 31036; bugfix on 0.2.1.8-alpha.
  3030. o Deprecated features (onion service v2, backport form 0.4.4.2-alpha):
  3031. - Add a deprecation warning for version 2 onion services. Closes
  3032. ticket 40003.
  3033. Changes in version 0.4.5.1-alpha - 2020-11-01
  3034. Tor 0.4.5.1-alpha is the first alpha release in the 0.4.5.x series. It
  3035. improves support for IPv6, address discovery and self-testing, code
  3036. metrics and tracing.
  3037. This release also fixes TROVE-2020-005, a security issue that could be
  3038. used, under certain cases, by an adversary to observe traffic patterns
  3039. on a limited number of circuits intended for a different relay. To
  3040. mount this attack, the adversary would need to actively extend
  3041. circuits to an incorrect address, as well as compromise a relay's
  3042. legacy RSA-1024 key. We'll be backporting this fix to other release
  3043. series soon, after it has had some testing.
  3044. Here are the changes since 0.4.4.5.
  3045. o Major features (build):
  3046. - When building Tor, first link all object files into a single
  3047. static library. This may help with embedding Tor in other
  3048. programs. Note that most Tor functions do not constitute a part of
  3049. a stable or supported API: only those functions in tor_api.h
  3050. should be used if embedding Tor. Closes ticket 40127.
  3051. o Major features (metrics):
  3052. - Introduce a new MetricsPort which exposes, through an HTTP
  3053. interface, a series of metrics that tor collects at runtime. At
  3054. the moment, the only supported output format is Prometheus data
  3055. model. Closes ticket 40063. See the manual page for more
  3056. information and security considerations.
  3057. o Major features (relay, IPv6):
  3058. - The torrc option Address now supports IPv6. This unifies our
  3059. address discovery interface to support IPv4, IPv6, and hostnames.
  3060. Closes ticket 33233.
  3061. - Launch IPv4 and IPv6 ORPort self-test circuits on relays and
  3062. bridges. Closes ticket 33222.
  3063. - Relays now automatically bind on IPv6 for their ORPort, unless
  3064. specified otherwise with the IPv4Only flag. Closes ticket 33246.
  3065. - When a relay with IPv6 support is told to open a connection to
  3066. another relay, and the extend cell lists both IPv4 and IPv6
  3067. addresses, the first relay now picks randomly which address to
  3068. use. Closes ticket 33220.
  3069. - Relays now track their IPv6 ORPort reachability separately from
  3070. the reachability of their IPv4 ORPort. They will not publish a
  3071. descriptor unless _both_ ports appear to be externally reachable.
  3072. Closes ticket 34067.
  3073. o Major features (tracing):
  3074. - Add event-tracing library support for USDT and LTTng-UST, and a
  3075. few tracepoints in the circuit subsystem. More will come
  3076. incrementally. This feature is compiled out by default: it needs
  3077. to be enabled at configure time. See documentation in
  3078. doc/HACKING/Tracing.md. Closes ticket 32910.
  3079. o Major bugfixes (security):
  3080. - When completing a channel, relays now check more thoroughly to
  3081. make sure that it matches any pending circuits before attaching
  3082. those circuits. Previously, address correctness and Ed25519
  3083. identities were not checked in this case, but only when extending
  3084. circuits on an existing channel. Fixes bug 40080; bugfix on
  3085. 0.2.7.2-alpha. Resolves TROVE-2020-005.
  3086. o Major bugfixes (TLS, buffer):
  3087. - When attempting to read N bytes on a TLS connection, really try to
  3088. read all N bytes. Previously, Tor would stop reading after the
  3089. first TLS record, which can be smaller than the N bytes requested,
  3090. and not check for more data until the next mainloop event. Fixes
  3091. bug 40006; bugfix on 0.1.0.5-rc.
  3092. o Minor features (address discovery):
  3093. - If no Address statements are found, relays now prioritize guessing
  3094. their address by looking at the local interface instead of the
  3095. local hostname. If the interface address can't be found, the local
  3096. hostname is used. Closes ticket 33238.
  3097. o Minor features (admin tools):
  3098. - Add a new --format argument to -key-expiration option to allow
  3099. specifying the time format of the expiration date. Adds Unix
  3100. timestamp format support. Patch by Daniel Pinto. Closes
  3101. ticket 30045.
  3102. o Minor features (bootstrap reporting):
  3103. - When reporting bootstrapping status on a relay, do not consider
  3104. connections that have never been the target of an origin circuit.
  3105. Previously, all connection failures were treated as potential
  3106. bootstrapping failures, including connections that had been opened
  3107. because of client requests. Closes ticket 25061.
  3108. o Minor features (build):
  3109. - When running the configure script, try to detect version
  3110. mismatches between the OpenSSL headers and libraries, and suggest
  3111. that the user should try "--with-openssl-dir". Closes 40138.
  3112. - If the configure script has given any warnings, remind the user
  3113. about them at the end of the script. Related to 40138.
  3114. o Minor features (configuration):
  3115. - Allow using wildcards (* and ?) with the %include option on
  3116. configuration files. Closes ticket 25140. Patch by Daniel Pinto.
  3117. - Allow the configuration options EntryNodes, ExcludeNodes,
  3118. ExcludeExitNodes, ExitNodes, MiddleNodes, HSLayer2Nodes and
  3119. HSLayer3Nodes to be specified multiple times. Closes ticket 28361.
  3120. Patch by Daniel Pinto.
  3121. o Minor features (control port):
  3122. - Add a DROPTIMEOUTS command to drop circuit build timeout history
  3123. and reset the current timeout. Closes ticket 40002.
  3124. - When a stream enters the AP_CONN_STATE_CONTROLLER_WAIT status,
  3125. send a control port event. Closes ticket 32190. Patch by
  3126. Neel Chauhan.
  3127. - Introduce GETINFO "stats/ntor/{assigned/requested}" and
  3128. "stats/tap/{assigned/requested}" to get the NTor and TAP circuit
  3129. onion handshake counts respectively. Closes ticket 28279. Patch by
  3130. Neel Chauhan.
  3131. o Minor features (control port, IPv6):
  3132. - Tor relays now try to report to the controller when they are
  3133. launching an IPv6 self-test. Closes ticket 34068.
  3134. - Introduce "GETINFO address/v4" and "GETINFO address/v6" in the
  3135. control port to fetch the Tor host's respective IPv4 or IPv6
  3136. address. We keep "GETINFO address" for backwards-compatibility.
  3137. Closes ticket 40039. Patch by Neel Chauhan.
  3138. o Minor features (directory authorities):
  3139. - Authorities now list a different set of protocols as required and
  3140. recommended. These lists have been chosen so that only truly
  3141. recommended and/or required protocols are included, and so that
  3142. clients using 0.2.9 or later will continue to work (even though
  3143. they are not supported), whereas only relays running 0.3.5 or
  3144. later will meet the requirements. Closes ticket 40162.
  3145. - Add a new consensus method 30 that removes the unnecessary "="
  3146. padding from ntor-onion-key. Closes ticket 7869. Patch by
  3147. Daniel Pinto.
  3148. - Directory authorities now reject descriptors from relays running
  3149. Tor versions from the obsolete 0.4.1 series. Resolves ticket
  3150. 34357. Patch by Neel Chauhan.
  3151. - Make it possible to specify multiple ConsensusParams torrc lines.
  3152. Now directory authority operators can for example put the main
  3153. ConsensusParams config in one torrc file and then add to it from a
  3154. different torrc file. Closes ticket 40164.
  3155. - The AssumeReachable option no longer stops directory authorities
  3156. from checking whether other relays are running. A new
  3157. AuthDirTestReachability option can be used to disable these
  3158. checks. Closes ticket 34445.
  3159. - When looking for possible Sybil attacks, also consider IPv6
  3160. addresses. Two routers are considered to have "the same" address
  3161. by this metric if they are in the same /64 network. Patch from
  3162. Maurice Pibouin. Closes ticket 7193.
  3163. o Minor features (directory authorities, IPv6):
  3164. - Make authorities add their IPv6 ORPort (if any) to the trusted
  3165. servers list. Authorities previously added only their IPv4
  3166. addresses. Closes ticket 32822.
  3167. o Minor features (ed25519, relay):
  3168. - Save a relay's base64-encoded ed25519 identity key to the data
  3169. directory in a file named fingerprint-ed25519. Closes ticket
  3170. 30642. Patch by Neel Chauhan.
  3171. o Minor features (heartbeat):
  3172. - Include the total number of inbound and outbound IPv4 and IPv6
  3173. connections in the heartbeat message. Closes ticket 29113.
  3174. o Minor features (IPv6, ExcludeNodes):
  3175. - Handle IPv6 addresses in ExcludeNodes; previously they were
  3176. ignored. Closes ticket 34065. Patch by Neel Chauhan.
  3177. o Minor features (logging):
  3178. - Add the running glibc version to the log, and the compiled glibc
  3179. version to the library list returned when using --library-versions.
  3180. Patch from Daniel Pinto. Closes ticket 40047.
  3181. - Consider an HTTP 301 response to be an error (like a 404) when
  3182. processing a directory response. Closes ticket 40053.
  3183. - Log directory fetch statistics as a single line. Closes
  3184. ticket 40159.
  3185. - Provide more complete descriptions of our connections when logging
  3186. about them. Closes ticket 40041.
  3187. - When describing a relay in the logs, we now include its ed25519
  3188. identity. Closes ticket 22668.
  3189. o Minor features (onion services):
  3190. - Only overwrite an onion service's existing hostname file if its
  3191. contents are wrong. This enables read-only onion-service
  3192. directories. Resolves ticket 40062. Patch by Neel Chauhan.
  3193. o Minor features (pluggable transports):
  3194. - Add an OutboundBindAddressPT option to allow users to specify
  3195. which IPv4 and IPv6 address pluggable transports should use for
  3196. outgoing IP packets. Tor does not have a way to enforce that the
  3197. pluggable transport honors this option, so each pluggable transport
  3198. needs to implement support on its own. Closes ticket 5304.
  3199. o Minor features (relay address tracking):
  3200. - We now store relay addresses for OR connections in a more logical
  3201. way. Previously we would sometimes overwrite the actual address of
  3202. a connection with a "canonical address", and then store the "real
  3203. address" elsewhere to remember it. We now track the "canonical
  3204. address" elsewhere for the cases where we need it, and leave the
  3205. connection's address alone. Closes ticket 33898.
  3206. o Minor features (relay):
  3207. - If a relay is unable to discover its address, attempt to learn it
  3208. from the NETINFO cell. Closes ticket 40022.
  3209. - Log immediately when launching a relay self-check. Previously we
  3210. would try to log before launching checks, or approximately when we
  3211. intended to launch checks, but this tended to be error-prone.
  3212. Closes ticket 34137.
  3213. o Minor features (relay, address discovery):
  3214. - If Address option is not found in torrc, attempt to learn our
  3215. address with the configured ORPort address if any. Closes
  3216. ticket 33236.
  3217. o Minor features (relay, IPv6):
  3218. - Add an AssumeReachableIPv6 option to disable self-checking IPv6
  3219. reachability. Closes part of ticket 33224.
  3220. - Add new "assume-reachable" and "assume-reachable-ipv6" consensus
  3221. parameters to be used in an emergency to tell relays that they
  3222. should publish even if they cannot complete their ORPort self-
  3223. checks. Closes ticket 34064 and part of 33224.
  3224. - Allow relays to send IPv6-only extend cells. Closes ticket 33222.
  3225. - Declare support for the Relay=3 subprotocol version. Closes
  3226. ticket 33226.
  3227. - When launching IPv6 ORPort self-test circuits, make sure that the
  3228. second-last hop can initiate an IPv6 extend. Closes ticket 33222.
  3229. o Minor features (specification update):
  3230. - Several fields in microdescriptors, router descriptors, and
  3231. consensus documents that were formerly optional are now required.
  3232. Implements proposal 315; closes ticket 40132.
  3233. o Minor features (state management):
  3234. - When loading the state file, remove entries from the statefile
  3235. that have been obsolete for a long time. Ordinarily Tor preserves
  3236. unrecognized entries in order to keep forward-compatibility, but
  3237. these entries have not actually been used in any release since
  3238. before 0.3.5.x. Closes ticket 40137.
  3239. o Minor features (statistics, ipv6):
  3240. - Relays now publish IPv6-specific counts of single-direction versus
  3241. bidirectional relay connections. Closes ticket 33264.
  3242. - Relays now publish their IPv6 read and write statistics over time,
  3243. if statistics are enabled. Closes ticket 33263.
  3244. o Minor features (subprotocol versions):
  3245. - Tor no longer allows subprotocol versions larger than 63.
  3246. Previously version numbers up to UINT32_MAX were allowed, which
  3247. significantly complicated our code. Implements proposal 318;
  3248. closes ticket 40133.
  3249. - Use the new limitations on subprotocol versions due to proposal
  3250. 318 to simplify our implementation. Part of ticket 40133.
  3251. o Minor features (testing configuration):
  3252. - The TestingTorNetwork option no longer implicitly sets
  3253. AssumeReachable to 1. This change allows us to test relays' self-
  3254. testing mechanisms, and to test authorities' relay-testing
  3255. functionality. Closes ticket 34446.
  3256. o Minor features (testing):
  3257. - Added unit tests for channel_matches_target_addr_for_extend().
  3258. Closes Ticket 33919. Patch by MrSquanchee.
  3259. o Minor features (tests, v2 onion services):
  3260. - Fix a rendezvous cache unit test that was triggering an underflow
  3261. on the global rend cache allocation. Fixes bug 40125; bugfix
  3262. on 0.2.8.1-alpha.
  3263. - Fix another rendezvous cache unit test that was triggering an
  3264. underflow on the global rend cache allocation. Fixes bug 40126;
  3265. bugfix on 0.2.8.1-alpha.
  3266. o Minor bugfixes (circuit padding):
  3267. - When circpad_send_padding_cell_for_callback is called,
  3268. `is_padding_timer_scheduled` flag was not reset. Now it is set to
  3269. 0 at the top of that function. Fixes bug 32671; bugfix
  3270. on 0.4.0.1-alpha.
  3271. - Add a per-circuit padding machine instance counter, so we can
  3272. differentiate between shutdown requests for old machines on a
  3273. circuit. Fixes bug 30992; bugfix on 0.4.1.1-alpha.
  3274. - Add the ability to keep circuit padding machines if they match a
  3275. set of circuit states or purposes. This allows us to have machines
  3276. that start up under some conditions but don't shut down under
  3277. others. We now use this mask to avoid starting up introduction
  3278. circuit padding again after the machines have already completed.
  3279. Fixes bug 32040; bugfix on 0.4.1.1-alpha.
  3280. o Minor bugfixes (compatibility):
  3281. - Strip '\r' characters when reading text files on Unix platforms.
  3282. This should resolve an issue where a relay operator migrates a
  3283. relay from Windows to Unix, but does not change the line ending of
  3284. Tor's various state files to match the platform, and the CRLF line
  3285. endings from Windows end up leaking into other files such as the
  3286. extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.
  3287. o Minor bugfixes (compilation):
  3288. - Fix compiler warnings that would occur when building with
  3289. "--enable-all-bugs-are-fatal" and "--disable-module-relay" at the
  3290. same time. Fixes bug 40129; bugfix on 0.4.4.1-alpha.
  3291. - Resolve a compilation warning that could occur in
  3292. test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
  3293. o Minor bugfixes (configuration):
  3294. - Fix bug where %including a pattern ending with */ would include
  3295. files and folders (instead of folders only) in versions of glibc <
  3296. 2.19. Fixes bug 40141; bugfix on 0.4.5.0-alpha-dev. Patch by
  3297. Daniel Pinto.
  3298. o Minor bugfixes (control port):
  3299. - Make sure we send the SOCKS request address in relay begin cells
  3300. when a stream is attached with the purpose
  3301. CIRCUIT_PURPOSE_CONTROLLER. Fixes bug 33124; bugfix on 0.0.5.
  3302. Patch by Neel Chauhan.
  3303. o Minor bugfixes (logging):
  3304. - Remove a debug logging statement that uselessly spammed the logs.
  3305. Fixes bug 40135; bugfix on 0.3.5.0-alpha.
  3306. - When logging a rate-limited message about how many messages have
  3307. been suppressed in the last N seconds, give an accurate value for
  3308. N, rounded up to the nearest minute. Previously we would report
  3309. the size of the rate-limiting interval, regardless of when the
  3310. messages started to occur. Fixes bug 19431; bugfix
  3311. on 0.2.2.16-alpha.
  3312. o Minor bugfixes (relay configuration, crash):
  3313. - Avoid a fatal assert() when failing to create a listener
  3314. connection for an address that was in use. Fixes bug 40073; bugfix
  3315. on 0.3.5.1-alpha.
  3316. o Minor bugfixes (rust, protocol versions):
  3317. - Declare support for the onion service introduction point denial of
  3318. service extensions when building with Rust. Fixes bug 34248;
  3319. bugfix on 0.4.2.1-alpha.
  3320. - Make Rust protocol version support checks consistent with the
  3321. undocumented error behavior of the corresponding C code. Fixes bug
  3322. 34251; bugfix on 0.3.3.5-rc.
  3323. o Minor bugfixes (self-testing):
  3324. - When receiving an incoming circuit, only accept it as evidence
  3325. that we are reachable if the declared address of its channel is
  3326. the same address we think that we have. Otherwise, it could be
  3327. evidence that we're reachable on some other address. Fixes bug
  3328. 20165; bugfix on 0.1.0.1-rc.
  3329. o Minor bugfixes (spec conformance):
  3330. - Use the correct key type when generating signing->link
  3331. certificates. Fixes bug 40124; bugfix on 0.2.7.2-alpha.
  3332. o Minor bugfixes (subprotocol versions):
  3333. - Consistently reject extra commas, instead of only rejecting
  3334. leading commas. Fixes bug 27194; bugfix on 0.2.9.4-alpha.
  3335. - In summarize_protover_flags(), treat empty strings the same as
  3336. NULL. This prevents protocols_known from being set. Previously, we
  3337. treated empty strings as normal strings, which led to
  3338. protocols_known being set. Fixes bug 34232; bugfix on
  3339. 0.3.3.2-alpha. Patch by Neel Chauhan.
  3340. o Minor bugfixes (v2 onion services):
  3341. - For HSFETCH commands on v2 onion services addresses, check the
  3342. length of bytes decoded, not the base32 length. Fixes bug 34400;
  3343. bugfix on 0.4.1.1-alpha. Patch by Neel Chauhan.
  3344. o Code simplification and refactoring:
  3345. - Add and use a set of functions to perform down-casts on constant
  3346. connection and channel pointers. Closes ticket 40046.
  3347. - Refactor our code that logs descriptions of connections, channels,
  3348. and the peers on them, to use a single call path. This change
  3349. enables us to refactor the data types that they use, and eliminates
  3350. many confusing usages of those types. Closes ticket 40041.
  3351. - Refactor some common node selection code into a single function.
  3352. Closes ticket 34200.
  3353. - Remove the now-redundant 'outbuf_flushlen' field from our
  3354. connection type. It was previously used for an older version of
  3355. our rate-limiting logic. Closes ticket 33097.
  3356. - Rename "fascist_firewall_*" identifiers to "reachable_addr_*"
  3357. instead, for consistency with other code. Closes ticket 18106.
  3358. - Rename functions about "advertised" ports which are not in fact
  3359. guaranteed to return the ports that have been advertised. Closes
  3360. ticket 40055.
  3361. - Split implementation of several command line options from
  3362. options_init_from_torrc into smaller isolated functions. Patch by
  3363. Daniel Pinto. Closes ticket 40102.
  3364. - When an extend cell is missing an IPv4 or IPv6 address, fill in
  3365. the address from the extend info. This is similar to what was done
  3366. in ticket 33633 for ed25519 keys. Closes ticket 33816. Patch by
  3367. Neel Chauhan.
  3368. o Deprecated features:
  3369. - The "non-builtin" argument to the "--dump-config" command is now
  3370. deprecated. When it works, it behaves the same as "short", which
  3371. you should use instead. Closes ticket 33398.
  3372. o Documentation:
  3373. - Replace URLs from our old bugtracker so that they refer to the new
  3374. bugtracker and wiki. Closes ticket 40101.
  3375. o Removed features:
  3376. - We no longer ship or build a "tor.service" file for use with
  3377. systemd. No distribution included this script unmodified, and we
  3378. don't have the expertise ourselves to maintain this in a way that
  3379. all the various systemd-based distributions can use. Closes
  3380. ticket 30797.
  3381. - We no longer ship support for the Android logging API. Modern
  3382. versions of Android can use the syslog API instead. Closes
  3383. ticket 32181.
  3384. - The "optimistic data" feature is now always on; there is no longer
  3385. an option to disable it from the torrc file or from the consensus
  3386. directory. Closes part of 40139.
  3387. - The "usecreatefast" network parameter is now removed; there is no
  3388. longer an option for authorities to turn it off. Closes part
  3389. of 40139.
  3390. o Testing:
  3391. - Add unit tests for bandwidth statistics manipulation functions.
  3392. Closes ticket 33812. Patch by MrSquanchee.
  3393. o Code simplification and refactoring (autoconf):
  3394. - Remove autoconf checks for unused funcs and headers. Closes ticket
  3395. 31699; Patch by @bduszel
  3396. o Code simplification and refactoring (maintainer scripts):
  3397. - Disable by default the pre-commit hook. Use the environment
  3398. variable TOR_EXTRA_PRE_COMMIT_CHECKS in order to run it.
  3399. Furthermore, stop running practracker in the pre-commit hook and
  3400. make check-local. Closes ticket 40019.
  3401. o Code simplification and refactoring (relay address):
  3402. - Most of IPv4 representation was using "uint32_t". It has now been
  3403. moved to use the internal "tor_addr_t" interface instead. This is
  3404. so we can properly integrate IPv6 along IPv4 with common
  3405. interfaces. Closes ticket 40043.
  3406. o Documentation (manual page):
  3407. - Move them from doc/ to doc/man/. Closes ticket 40044.
  3408. - Describe the status of the "Sandbox" option more accurately. It is
  3409. no longer "experimental", but it _is_ dependent on kernel and libc
  3410. versions. Closes ticket 23378.
  3411. o Documentation (tracing):
  3412. - Document in depth the circuit subsystem trace events in the new
  3413. doc/tracing/EventsCircuit.md. Closes ticket 40036.
  3414. Changes in version 0.4.4.5 - 2020-09-15
  3415. Tor 0.4.4.5 is the first stable release in the 0.4.4.x series. This
  3416. series improves our guard selection algorithms, adds v3 onion balance
  3417. support, improves the amount of code that can be disabled when running
  3418. without relay support, and includes numerous small bugfixes and
  3419. enhancements. It also lays the ground for some IPv6 features that
  3420. we'll be developing more in the next (0.4.5) series.
  3421. Per our support policy, we support each stable release series for nine
  3422. months after its first stable release, or three months after the first
  3423. stable release of the next series: whichever is longer. This means
  3424. that 0.4.4.x will be supported until around June 2021--or later, if
  3425. 0.4.5.x is later than anticipated.
  3426. Note also that support for 0.4.2.x has just ended; support for 0.4.3
  3427. will continue until Feb 15, 2021. We still plan to continue supporting
  3428. 0.3.5.x, our long-term stable series, until Feb 2022.
  3429. Below are the changes since 0.4.4.4-rc. For a complete list of changes
  3430. since 0.4.3.6, see the ReleaseNotes file.
  3431. o Major bugfixes (onion services, DoS):
  3432. - Correct handling of parameters for the onion service DoS defense.
  3433. Previously, the consensus parameters for the onion service DoS
  3434. defenses were overwriting the parameters set by the service
  3435. operator using HiddenServiceEnableIntroDoSDefense. Fixes bug
  3436. 40109; bugfix on 0.4.2.1-alpha.
  3437. o Major bugfixes (stats, onion services):
  3438. - Fix a bug where we were undercounting the Tor network's total
  3439. onion service traffic, by ignoring any traffic originating from
  3440. clients. Now we count traffic from both clients and services.
  3441. Fixes bug 40117; bugfix on 0.2.6.2-alpha.
  3442. o Minor features (control port):
  3443. - If a ClientName was specified in ONION_CLIENT_AUTH_ADD for an
  3444. onion service, display it when we use ONION_CLIENT_AUTH_VIEW.
  3445. Closes ticket 40089. Patch by Neel Chauhan.
  3446. o Minor features (denial-of-service memory limiter):
  3447. - Allow the user to configure even lower values for the
  3448. MaxMemInQueues parameter. Relays now enforce a minimum of 64 MB,
  3449. when previously the minimum was 256 MB. On clients, there is no
  3450. minimum. Relays and clients will both warn if the value is set so
  3451. low that Tor is likely to stop working. Closes ticket 24308.
  3452. o Minor features (tests):
  3453. - Our "make check" target now runs the unit tests in 8 parallel
  3454. chunks. Doing this speeds up hardened CI builds by more than a
  3455. factor of two. Closes ticket 40098.
  3456. o Minor bugfixes (guard selection algorithm):
  3457. - Avoid needless guard-related warning when upgrading from 0.4.3 to
  3458. 0.4.4. Fixes bug 40105; bugfix on 0.4.4.1-alpha.
  3459. o Minor bugfixes (tests):
  3460. - Fix the behavior of the rend_cache/clean_v2_descs_as_dir when run
  3461. on its own. Previously, it would exit with an error. Fixes bug
  3462. 40099; bugfix on 0.2.8.1-alpha.
  3463. Changes in version 0.4.4.3-alpha - 2020-07-27
  3464. Tor 0.4.4.3-alpha fixes several annoyances in previous versions,
  3465. including one affecting NSS users, and several affecting the Linux
  3466. seccomp2 sandbox.
  3467. o Major features (fallback directory list):
  3468. - Replace the 148 fallback directories originally included in Tor
  3469. 0.4.1.4-rc (of which around 105 are still functional) with a list
  3470. of 144 fallbacks generated in July 2020. Closes ticket 40061.
  3471. o Major bugfixes (NSS):
  3472. - When running with NSS enabled, make sure that NSS knows to expect
  3473. nonblocking sockets. Previously, we set our TCP sockets as
  3474. nonblocking, but did not tell NSS, which in turn could lead to
  3475. unexpected blocking behavior. Fixes bug 40035; bugfix
  3476. on 0.3.5.1-alpha.
  3477. o Minor bugfixes (linux seccomp2 sandbox):
  3478. - Fix a regression on sandboxing rules for the openat() syscall. The
  3479. fix for bug 25440 fixed the problem on systems with glibc >= 2.27
  3480. but broke with versions of glibc. We now choose a rule based on
  3481. the glibc version. Patch from Daniel Pinto. Fixes bug 27315;
  3482. bugfix on 0.3.5.11.
  3483. - Makes the seccomp sandbox allow the correct syscall for opendir
  3484. according to the running glibc version. This fixes crashes when
  3485. reloading torrc with sandbox enabled when running on glibc 2.15 to
  3486. 2.21 and 2.26. Patch from Daniel Pinto. Fixes bug 40020; bugfix
  3487. on 0.3.5.11.
  3488. o Minor bugfixes (relay, usability):
  3489. - Adjust the rules for when to warn about having too many
  3490. connections to other relays. Previously we'd tolerate up to 1.5
  3491. connections per relay on average. Now we tolerate more connections
  3492. for directory authorities, and raise the number of total
  3493. connections we need to see before we warn. Fixes bug 33880; bugfix
  3494. on 0.3.1.1-alpha.
  3495. o Documentation:
  3496. - Replace most http:// URLs in our code and documentation with
  3497. https:// URLs. (We have left unchanged the code in src/ext/, and
  3498. the text in LICENSE.) Closes ticket 31812. Patch from Jeremy Rand.
  3499. o Removed features:
  3500. - Our "check-local" test target no longer tries to use the
  3501. Coccinelle semantic patching tool parse all the C files. While it
  3502. is a good idea to try to make sure Coccinelle works on our C
  3503. before we run a Coccinelle patch, doing so on every test run has
  3504. proven to be disruptive. You can still run this tool manually with
  3505. "make check-cocci". Closes ticket 40030.
  3506. Changes in version 0.3.5.11 - 2020-07-09
  3507. Tor 0.3.5.11 backports fixes from later tor releases, including several
  3508. usability, portability, and reliability fixes.
  3509. This release also fixes TROVE-2020-001, a medium-severity denial of
  3510. service vulnerability affecting all versions of Tor when compiled with
  3511. the NSS encryption library. (This is not the default configuration.)
  3512. Using this vulnerability, an attacker could cause an affected Tor
  3513. instance to crash remotely. This issue is also tracked as CVE-2020-
  3514. 15572. Anybody running a version of Tor built with the NSS library
  3515. should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
  3516. or later.
  3517. o Major bugfixes (NSS, security, backport from 0.4.4.2-alpha):
  3518. - Fix a crash due to an out-of-bound memory access when Tor is
  3519. compiled with NSS support. Fixes bug 33119; bugfix on
  3520. 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
  3521. and CVE-2020-15572.
  3522. o Major bugfixes (DoS defenses, bridges, pluggable transport, backport from 0.4.3.4-rc):
  3523. - Fix a bug that was preventing DoS defenses from running on bridges
  3524. with a pluggable transport. Previously, the DoS subsystem was not
  3525. given the transport name of the client connection, thus failed to
  3526. find the GeoIP cache entry for that client address. Fixes bug
  3527. 33491; bugfix on 0.3.3.2-alpha.
  3528. o Minor features (testing, backport from 0.4.3.4-rc):
  3529. - The unit tests now support a "TOR_SKIP_TESTCASES" environment
  3530. variable to specify a list of space-separated test cases that
  3531. should not be executed. We will use this to disable certain tests
  3532. that are failing on Appveyor because of mismatched OpenSSL
  3533. libraries. Part of ticket 33643.
  3534. o Minor bugfix (CI, Windows, backport from 0.4.4.2-alpha):
  3535. - Use the correct 64-bit printf format when compiling with MINGW on
  3536. Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
  3537. o Minor bugfix (relay, configuration, backport from 0.4.3.3-alpha):
  3538. - Warn if the ContactInfo field is not set, and tell the relay
  3539. operator that not having a ContactInfo field set might cause their
  3540. relay to get rejected in the future. Fixes bug 33361; bugfix
  3541. on 0.1.1.10-alpha.
  3542. o Minor bugfixes (client performance, backport from 0.4.4.1-alpha):
  3543. - Resume use of preemptively-built circuits when UseEntryGuards is set
  3544. to 0. We accidentally disabled this feature with that config
  3545. setting, leading to slower load times. Fixes bug 34303; bugfix
  3546. on 0.3.3.2-alpha.
  3547. o Minor bugfixes (compiler compatibility, backport from 0.4.3.5):
  3548. - Avoid compiler warnings from Clang 10 related to the use of GCC-
  3549. style "/* falls through */" comments. Both Clang and GCC allow
  3550. __attribute__((fallthrough)) instead, so that's what we're using
  3551. now. Fixes bug 34078; bugfix on 0.3.1.3-alpha.
  3552. o Minor bugfixes (compiler warnings, backport from 0.4.4.2-alpha):
  3553. - Fix a compiler warning on platforms with 32-bit time_t values.
  3554. Fixes bug 40028; bugfix on 0.3.2.8-rc.
  3555. o Minor bugfixes (embedded Tor, backport from 0.4.3.1-alpha):
  3556. - When starting Tor any time after the first time in a process,
  3557. register the thread in which it is running as the main thread.
  3558. Previously, we only did this on Windows, which could lead to bugs
  3559. like 23081 on non-Windows platforms. Fixes bug 32884; bugfix
  3560. on 0.3.3.1-alpha.
  3561. o Minor bugfixes (key portability, backport from 0.4.3.4-rc):
  3562. - When reading PEM-encoded key data, tolerate CRLF line-endings even
  3563. if we are not running on Windows. Previously, non-Windows hosts
  3564. would reject these line-endings in certain positions, making
  3565. certain key files hard to move from one host to another. Fixes bug
  3566. 33032; bugfix on 0.3.5.1-alpha.
  3567. o Minor bugfixes (logging, backport from 0.4.4.2-alpha):
  3568. - Downgrade a noisy log message that could occur naturally when
  3569. receiving an extrainfo document that we no longer want. Fixes bug
  3570. 16016; bugfix on 0.2.6.3-alpha.
  3571. o Minor bugfixes (onion service v3, client, backport from 0.4.3.3-alpha):
  3572. - Remove a BUG() warning that would cause a stack trace if an onion
  3573. service descriptor was freed while we were waiting for a
  3574. rendezvous circuit to complete. Fixes bug 28992; bugfix
  3575. on 0.3.2.1-alpha.
  3576. o Testing (CI, backport from 0.4.3.4-rc):
  3577. - In our Appveyor Windows CI, copy required DLLs to test and app
  3578. directories, before running tor's tests. This ensures that tor.exe
  3579. and test*.exe use the correct version of each DLL. This fix is not
  3580. required, but we hope it will avoid DLL search issues in future.
  3581. Fixes bug 33673; bugfix on 0.3.4.2-alpha.
  3582. - On Appveyor, skip the crypto/openssl_version test, which is
  3583. failing because of a mismatched library installation. Fix
  3584. for 33643.
  3585. Changes in version 0.4.2.8 - 2020-07-09
  3586. Tor 0.4.2.8 backports various fixes from later releases, including
  3587. several that affect usability and portability.
  3588. This release also fixes TROVE-2020-001, a medium-severity denial of
  3589. service vulnerability affecting all versions of Tor when compiled with
  3590. the NSS encryption library. (This is not the default configuration.)
  3591. Using this vulnerability, an attacker could cause an affected Tor
  3592. instance to crash remotely. This issue is also tracked as CVE-2020-
  3593. 15572. Anybody running a version of Tor built with the NSS library
  3594. should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
  3595. or later.
  3596. o Major bugfixes (NSS, security, backport from 0.4.4.2-alpha):
  3597. - Fix a crash due to an out-of-bound memory access when Tor is
  3598. compiled with NSS support. Fixes bug 33119; bugfix on
  3599. 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
  3600. and CVE-2020-15572.
  3601. o Major bugfixes (DoS defenses, bridges, pluggable transport, backport from 0.4.3.4-rc):
  3602. - Fix a bug that was preventing DoS defenses from running on bridges
  3603. with a pluggable transport. Previously, the DoS subsystem was not
  3604. given the transport name of the client connection, thus failed to
  3605. find the GeoIP cache entry for that client address. Fixes bug
  3606. 33491; bugfix on 0.3.3.2-alpha.
  3607. o Minor feature (sendme, flow control, backport form 0.4.3.4-rc):
  3608. - Default to sending SENDME version 1 cells. (Clients are already
  3609. sending these, because of a consensus parameter telling them to do
  3610. so: this change only affects what clients would do if the
  3611. consensus didn't contain a recommendation.) Closes ticket 33623.
  3612. o Minor features (diagnostic, backport from 0.4.3.3-alpha):
  3613. - Improve assertions and add some memory-poisoning code to try to
  3614. track down possible causes of a rare crash (32564) in the EWMA
  3615. code. Closes ticket 33290.
  3616. o Minor features (testing, backport from 0.4.3.4-rc):
  3617. - The unit tests now support a "TOR_SKIP_TESTCASES" environment
  3618. variable to specify a list of space-separated test cases that
  3619. should not be executed. We will use this to disable certain tests
  3620. that are failing on Appveyor because of mismatched OpenSSL
  3621. libraries. Part of ticket 33643.
  3622. o Minor bugfix (CI, Windows, backport from 0.4.4.2-alpha):
  3623. - Use the correct 64-bit printf format when compiling with MINGW on
  3624. Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
  3625. o Minor bugfix (relay, configuration, backport from 0.4.3.3-alpha):
  3626. - Warn if the ContactInfo field is not set, and tell the relay
  3627. operator that not having a ContactInfo field set might cause their
  3628. relay to get rejected in the future. Fixes bug 33361; bugfix
  3629. on 0.1.1.10-alpha.
  3630. o Minor bugfixes (client performance, backport from 0.4.4.1-alpha):
  3631. - Resume use of preemptively-built circuits when UseEntryGuards is set
  3632. to 0. We accidentally disabled this feature with that config
  3633. setting, leading to slower load times. Fixes bug 34303; bugfix
  3634. on 0.3.3.2-alpha.
  3635. o Minor bugfixes (compiler compatibility, backport from 0.4.3.5):
  3636. - Avoid compiler warnings from Clang 10 related to the use of GCC-
  3637. style "/* falls through */" comments. Both Clang and GCC allow
  3638. __attribute__((fallthrough)) instead, so that's what we're using
  3639. now. Fixes bug 34078; bugfix on 0.3.1.3-alpha.
  3640. - Fix compilation warnings with GCC 10.0.1. Fixes bug 34077; bugfix
  3641. on 0.4.0.3-alpha.
  3642. o Minor bugfixes (compiler warnings, backport from 0.4.4.2-alpha):
  3643. - Fix a compiler warning on platforms with 32-bit time_t values.
  3644. Fixes bug 40028; bugfix on 0.3.2.8-rc.
  3645. o Minor bugfixes (controller protocol, backport from 0.4.3.2-alpha):
  3646. - When receiving "ACTIVE" or "DORMANT" signals on the control port,
  3647. report them as SIGNAL events. Previously we would log a bug
  3648. warning. Fixes bug 33104; bugfix on 0.4.0.1-alpha.
  3649. o Minor bugfixes (embedded Tor, backport from 0.4.3.1-alpha):
  3650. - When starting Tor any time after the first time in a process,
  3651. register the thread in which it is running as the main thread.
  3652. Previously, we only did this on Windows, which could lead to bugs
  3653. like 23081 on non-Windows platforms. Fixes bug 32884; bugfix
  3654. on 0.3.3.1-alpha.
  3655. o Minor bugfixes (key portability, backport from 0.4.3.4-rc):
  3656. - When reading PEM-encoded key data, tolerate CRLF line-endings even
  3657. if we are not running on Windows. Previously, non-Windows hosts
  3658. would reject these line-endings in certain positions, making
  3659. certain key files hard to move from one host to another. Fixes bug
  3660. 33032; bugfix on 0.3.5.1-alpha.
  3661. o Minor bugfixes (logging, backport from 0.4.3.2-rc):
  3662. - When logging a bug, do not say "Future instances of this warning
  3663. will be silenced" unless we are actually going to silence them.
  3664. Previously we would say this whenever a BUG() check failed in the
  3665. code. Fixes bug 33095; bugfix on 0.4.1.1-alpha.
  3666. o Minor bugfixes (logging, backport from 0.4.3.4-rc):
  3667. - Flush stderr, stdout, and file logs during shutdown, if supported
  3668. by the OS. This change helps make sure that any final logs are
  3669. recorded. Fixes bug 33087; bugfix on 0.4.1.6.
  3670. o Minor bugfixes (logging, backport from 0.4.4.2-alpha):
  3671. - Downgrade a noisy log message that could occur naturally when
  3672. receiving an extrainfo document that we no longer want. Fixes bug
  3673. 16016; bugfix on 0.2.6.3-alpha.
  3674. o Minor bugfixes (onion service v3, client, backport from 0.4.3.3-alpha):
  3675. - Remove a BUG() warning that would cause a stack trace if an onion
  3676. service descriptor was freed while we were waiting for a
  3677. rendezvous circuit to complete. Fixes bug 28992; bugfix
  3678. on 0.3.2.1-alpha.
  3679. o Testing (CI, backport from 0.4.3.4-rc):
  3680. - In our Appveyor Windows CI, copy required DLLs to test and app
  3681. directories, before running tor's tests. This ensures that tor.exe
  3682. and test*.exe use the correct version of each DLL. This fix is not
  3683. required, but we hope it will avoid DLL search issues in future.
  3684. Fixes bug 33673; bugfix on 0.3.4.2-alpha.
  3685. - On Appveyor, skip the crypto/openssl_version test, which is
  3686. failing because of a mismatched library installation. Fix
  3687. for 33643.
  3688. Changes in version 0.4.3.6 - 2020-07-09
  3689. Tor 0.4.3.6 backports several bugfixes from later releases, including
  3690. some affecting usability.
  3691. This release also fixes TROVE-2020-001, a medium-severity denial of
  3692. service vulnerability affecting all versions of Tor when compiled with
  3693. the NSS encryption library. (This is not the default configuration.)
  3694. Using this vulnerability, an attacker could cause an affected Tor
  3695. instance to crash remotely. This issue is also tracked as CVE-2020-
  3696. 15572. Anybody running a version of Tor built with the NSS library
  3697. should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
  3698. or later.
  3699. o Major bugfixes (NSS, security, backport from 0.4.4.2-alpha):
  3700. - Fix a crash due to an out-of-bound memory access when Tor is
  3701. compiled with NSS support. Fixes bug 33119; bugfix on
  3702. 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
  3703. and CVE-2020-15572.
  3704. o Minor bugfix (CI, Windows, backport from 0.4.4.2-alpha):
  3705. - Use the correct 64-bit printf format when compiling with MINGW on
  3706. Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
  3707. o Minor bugfixes (client performance, backport from 0.4.4.1-alpha):
  3708. - Resume use of preemptively-built circuits when UseEntryGuards is set
  3709. to 0. We accidentally disabled this feature with that config
  3710. setting, leading to slower load times. Fixes bug 34303; bugfix
  3711. on 0.3.3.2-alpha.
  3712. o Minor bugfixes (compiler warnings, backport from 0.4.4.2-alpha):
  3713. - Fix a compiler warning on platforms with 32-bit time_t values.
  3714. Fixes bug 40028; bugfix on 0.3.2.8-rc.
  3715. o Minor bugfixes (linux seccomp sandbox, nss, backport from 0.4.4.1-alpha):
  3716. - Fix a startup crash when tor is compiled with --enable-nss and
  3717. sandbox support is enabled. Fixes bug 34130; bugfix on
  3718. 0.3.5.1-alpha. Patch by Daniel Pinto.
  3719. o Minor bugfixes (logging, backport from 0.4.4.2-alpha):
  3720. - Downgrade a noisy log message that could occur naturally when
  3721. receiving an extrainfo document that we no longer want. Fixes bug
  3722. 16016; bugfix on 0.2.6.3-alpha.
  3723. o Minor bugfixes (manual page, backport from 0.4.4.1-alpha):
  3724. - Update the man page to reflect that MinUptimeHidServDirectoryV2
  3725. defaults to 96 hours. Fixes bug 34299; bugfix on 0.2.6.3-alpha.
  3726. o Minor bugfixes (onion service v3, backport from 0.4.4.1-alpha):
  3727. - Prevent an assert() that would occur when cleaning the client
  3728. descriptor cache, and attempting to close circuits for a non-
  3729. decrypted descriptor (lacking client authorization). Fixes bug
  3730. 33458; bugfix on 0.4.2.1-alpha.
  3731. o Minor bugfixes (portability, backport from 0.4.4.1-alpha):
  3732. - Fix a portability error in the configure script, where we were
  3733. using "==" instead of "=". Fixes bug 34233; bugfix on 0.4.3.5.
  3734. o Minor bugfixes (relays, backport from 0.4.4.1-alpha):
  3735. - Stop advertising incorrect IPv6 ORPorts in relay and bridge
  3736. descriptors, when the IPv6 port was configured as "auto". Fixes
  3737. bug 32588; bugfix on 0.2.3.9-alpha.
  3738. o Documentation (backport from 0.4.4.1-alpha):
  3739. - Fix several doxygen warnings related to imbalanced groups. Closes
  3740. ticket 34255.
  3741. Changes in version 0.4.4.2-alpha - 2020-07-09
  3742. This is the second alpha release in the 0.4.4.x series. It fixes a few
  3743. bugs in the previous release, and solves a few usability,
  3744. compatibility, and portability issues.
  3745. This release also fixes TROVE-2020-001, a medium-severity denial of
  3746. service vulnerability affecting all versions of Tor when compiled with
  3747. the NSS encryption library. (This is not the default configuration.)
  3748. Using this vulnerability, an attacker could cause an affected Tor
  3749. instance to crash remotely. This issue is also tracked as CVE-2020-
  3750. 15572. Anybody running a version of Tor built with the NSS library
  3751. should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
  3752. or later.
  3753. o Major bugfixes (NSS, security):
  3754. - Fix a crash due to an out-of-bound memory access when Tor is
  3755. compiled with NSS support. Fixes bug 33119; bugfix on
  3756. 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
  3757. and CVE-2020-15572.
  3758. o Minor features (bootstrap reporting):
  3759. - Report more detailed reasons for bootstrap failure when the
  3760. failure happens due to a TLS error. Previously we would just call
  3761. these errors "MISC" when they happened during read, and "DONE"
  3762. when they happened during any other TLS operation. Closes
  3763. ticket 32622.
  3764. o Minor features (directory authority):
  3765. - Authorities now recommend the protocol versions that are supported
  3766. by Tor 0.3.5 and later. (Earlier versions of Tor have been
  3767. deprecated since January of this year.) This recommendation will
  3768. cause older clients and relays to give a warning on startup, or
  3769. when they download a consensus directory. Closes ticket 32696.
  3770. o Minor features (entry guards):
  3771. - Reinstate support for GUARD NEW/UP/DOWN control port events.
  3772. Closes ticket 40001.
  3773. o Minor features (linux seccomp2 sandbox, portability):
  3774. - Allow Tor to build on platforms where it doesn't know how to
  3775. report which syscall caused the linux seccomp2 sandbox to fail.
  3776. This change should make the sandbox code more portable to less
  3777. common Linux architectures. Closes ticket 34382.
  3778. - Permit the unlinkat() syscall, which some Libc implementations use
  3779. to implement unlink(). Closes ticket 33346.
  3780. o Minor bugfix (CI, Windows):
  3781. - Use the correct 64-bit printf format when compiling with MINGW on
  3782. Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
  3783. o Minor bugfix (onion service v3 client):
  3784. - Remove a BUG() warning that could occur naturally. Fixes bug
  3785. 34087; bugfix on 0.3.2.1-alpha.
  3786. o Minor bugfix (SOCKS, onion service client):
  3787. - Detect v3 onion service addresses of the wrong length when
  3788. returning the F6 ExtendedErrors code. Fixes bug 33873; bugfix
  3789. on 0.4.3.1-alpha.
  3790. o Minor bugfixes (compiler warnings):
  3791. - Fix a compiler warning on platforms with 32-bit time_t values.
  3792. Fixes bug 40028; bugfix on 0.3.2.8-rc.
  3793. o Minor bugfixes (control port, onion service):
  3794. - Consistently use 'address' in "Invalid v3 address" response to
  3795. ONION_CLIENT_AUTH commands. Previously, we would sometimes say
  3796. 'addr'. Fixes bug 40005; bugfix on 0.4.3.1-alpha.
  3797. o Minor bugfixes (logging):
  3798. - Downgrade a noisy log message that could occur naturally when
  3799. receiving an extrainfo document that we no longer want. Fixes bug
  3800. 16016; bugfix on 0.2.6.3-alpha.
  3801. o Minor bugfixes (onion services v3):
  3802. - Avoid a non-fatal assertion failure in certain edge-cases when
  3803. opening an intro circuit as a client. Fixes bug 34084; bugfix
  3804. on 0.3.2.1-alpha.
  3805. o Deprecated features (onion service v2):
  3806. - Add a deprecation warning for version 2 onion services. Closes
  3807. ticket 40003.
  3808. o Removed features (IPv6, revert):
  3809. - Revert the change in the default value of ClientPreferIPv6OrPort:
  3810. it breaks the torsocks use case. The SOCKS resolve command has no
  3811. mechanism to ask for a specific address family (v4 or v6), and so
  3812. prioritizing IPv6 when an IPv4 address is requested on the SOCKS
  3813. interface resulted in a failure. Tor Browser explicitly sets
  3814. PreferIPv6, so this should not affect the majority of our users.
  3815. Closes ticket 33796; bugfix on 0.4.4.1-alpha.
  3816. Changes in version 0.4.4.1-alpha - 2020-06-16
  3817. This is the first alpha release in the 0.4.4.x series. It improves
  3818. our guard selection algorithms, improves the amount of code that
  3819. can be disabled when running without relay support, and includes numerous
  3820. small bugfixes and enhancements. It also lays the ground for some IPv6
  3821. features that we'll be developing more in the next (0.4.5) series.
  3822. Here are the changes since 0.4.3.5.
  3823. o Major features (Proposal 310, performance + security):
  3824. - Implements Proposal 310, "Bandaid on guard selection". Proposal
  3825. 310 solves load-balancing issues with older versions of the guard
  3826. selection algorithm, and improves its security. Under this new
  3827. algorithm, a newly selected guard never becomes Primary unless all
  3828. previously sampled guards are unreachable. Implements
  3829. recommendation from 32088. (Proposal 310 is linked to the CLAPS
  3830. project researching optimal client location-aware path selections.
  3831. This project is a collaboration between the UCLouvain Crypto Group,
  3832. the U.S. Naval Research Laboratory, and Princeton University.)
  3833. o Major features (IPv6, relay):
  3834. - Consider IPv6-only EXTEND2 cells valid on relays. Log a protocol
  3835. warning if the IPv4 or IPv6 address is an internal address, and
  3836. internal addresses are not allowed. But continue to use the other
  3837. address, if it is valid. Closes ticket 33817.
  3838. - If a relay can extend over IPv4 and IPv6, and both addresses are
  3839. provided, it chooses between them uniformly at random. Closes
  3840. ticket 33817.
  3841. - Re-use existing IPv6 connections for circuit extends. Closes
  3842. ticket 33817.
  3843. - Relays may extend circuits over IPv6, if the relay has an IPv6
  3844. ORPort, and the client supplies the other relay's IPv6 ORPort in
  3845. the EXTEND2 cell. IPv6 extends will be used by the relay IPv6
  3846. ORPort self-tests in 33222. Closes ticket 33817.
  3847. o Major features (v3 onion services):
  3848. - Allow v3 onion services to act as OnionBalance backend instances,
  3849. by using the HiddenServiceOnionBalanceInstance torrc option.
  3850. Closes ticket 32709.
  3851. o Minor feature (developer tools):
  3852. - Add a script to help check the alphabetical ordering of option
  3853. names in the manual page. Closes ticket 33339.
  3854. o Minor feature (onion service client, SOCKS5):
  3855. - Add 3 new SocksPort ExtendedErrors (F2, F3, F7) that reports back
  3856. new type of onion service connection failures. The semantics of
  3857. these error codes are documented in proposal 309. Closes
  3858. ticket 32542.
  3859. o Minor feature (onion service v3):
  3860. - If a service cannot upload its descriptor(s), log why at INFO
  3861. level. Closes ticket 33400; bugfix on 0.3.2.1-alpha.
  3862. o Minor feature (python scripts):
  3863. - Stop assuming that /usr/bin/python exists. Instead of using a
  3864. hardcoded path in scripts that still use Python 2, use
  3865. /usr/bin/env, similarly to the scripts that use Python 3. Fixes
  3866. bug 33192; bugfix on 0.4.2.
  3867. o Minor features (client-only compilation):
  3868. - Disable more code related to the ext_orport protocol when
  3869. compiling without support for relay mode. Closes ticket 33368.
  3870. - Disable more of our self-testing code when support for relay mode
  3871. is disabled. Closes ticket 33370.
  3872. o Minor features (code safety):
  3873. - Check for failures of tor_inet_ntop() and tor_inet_ntoa()
  3874. functions in DNS and IP address processing code, and adjust
  3875. codepaths to make them less likely to crash entire Tor instances.
  3876. Resolves issue 33788.
  3877. o Minor features (compilation size):
  3878. - Most server-side DNS code is now disabled when building without
  3879. support for relay mode. Closes ticket 33366.
  3880. o Minor features (continuous integration):
  3881. - Run unit-test and integration test (Stem, Chutney) jobs with
  3882. ALL_BUGS_ARE_FATAL macro being enabled on Travis and Appveyor.
  3883. Resolves ticket 32143.
  3884. o Minor features (control port):
  3885. - Return a descriptive error message from the 'GETINFO status/fresh-
  3886. relay-descs' command on the control port. Previously, we returned
  3887. a generic error of "Error generating descriptor". Closes ticket
  3888. 32873. Patch by Neel Chauhan.
  3889. o Minor features (developer tooling):
  3890. - Refrain from listing all .a files that are generated by the Tor
  3891. build in .gitignore. Add a single wildcard *.a entry that covers
  3892. all of them for present and future. Closes ticket 33642.
  3893. - Add a script ("git-install-tools.sh") to install git hooks and
  3894. helper scripts. Closes ticket 33451.
  3895. o Minor features (directory authority, shared random):
  3896. - Refactor more authority-only parts of the shared-random scheduling
  3897. code to reside in the dirauth module, and to be disabled when
  3898. compiling with --disable-module-dirauth. Closes ticket 33436.
  3899. o Minor features (directory):
  3900. - Remember the number of bytes we have downloaded for each directory
  3901. purpose while bootstrapping, and while fully bootstrapped. Log
  3902. this information as part of the heartbeat message. Closes
  3903. ticket 32720.
  3904. o Minor features (IPv6 support):
  3905. - Adds IPv6 support to tor_addr_is_valid(). Adds tests for the above
  3906. changes and tor_addr_is_null(). Closes ticket 33679. Patch
  3907. by MrSquanchee.
  3908. - Allow clients and relays to send dual-stack and IPv6-only EXTEND2
  3909. cells. Parse dual-stack and IPv6-only EXTEND2 cells on relays.
  3910. Closes ticket 33901.
  3911. o Minor features (logging):
  3912. - When trying to find our own address, add debug-level logging to
  3913. report the sources of candidate addresses. Closes ticket 32888.
  3914. o Minor features (testing, architecture):
  3915. - Our test scripts now double-check that subsystem initialization
  3916. order is consistent with the inter-module dependencies established
  3917. by our .may_include files. Implements ticket 31634.
  3918. - Initialize all subsystems at the beginning of our unit test
  3919. harness, to avoid crashes due to uninitialized subsystems. Follow-
  3920. up from ticket 33316.
  3921. o Minor features (v3 onion services):
  3922. - Add v3 onion service status to the dumpstats() call which is
  3923. triggered by a SIGUSR1 signal. Previously, we only did v2 onion
  3924. services. Closes ticket 24844. Patch by Neel Chauhan.
  3925. o Minor features (windows):
  3926. - Add support for console control signals like Ctrl+C in Windows.
  3927. Closes ticket 34211. Patch from Damon Harris (TheDcoder).
  3928. o Minor bugfix (onion service v3):
  3929. - Prevent an assert() that would occur when cleaning the client
  3930. descriptor cache, and attempting to close circuits for a non-
  3931. decrypted descriptor (lacking client authorization). Fixes bug
  3932. 33458; bugfix on 0.4.2.1-alpha.
  3933. o Minor bugfix (refactoring):
  3934. - Lift circuit_build_times_disabled() out of the
  3935. circuit_expire_building() loop, to save CPU time when there are
  3936. many circuits open. Fixes bug 33977; bugfix on 0.3.5.9.
  3937. o Minor bugfixes (client performance):
  3938. - Resume use of preemptively-built circuits when UseEntryGuards is set
  3939. to 0. We accidentally disabled this feature with that config
  3940. setting, leading to slower load times. Fixes bug 34303; bugfix
  3941. on 0.3.3.2-alpha.
  3942. o Minor bugfixes (directory authorities):
  3943. - Directory authorities now reject votes that arrive too late. In
  3944. particular, once an authority has started fetching missing votes,
  3945. it no longer accepts new votes posted by other authorities. This
  3946. change helps prevent a consensus split, where only some authorities
  3947. have the late vote. Fixes bug 4631; bugfix on 0.2.0.5-alpha.
  3948. o Minor bugfixes (git scripts):
  3949. - Stop executing the checked-out pre-commit hook from the pre-push
  3950. hook. Instead, execute the copy in the user's git directory. Fixes
  3951. bug 33284; bugfix on 0.4.1.1-alpha.
  3952. o Minor bugfixes (initialization):
  3953. - Initialize the subsystems in our code in an order more closely
  3954. corresponding to their dependencies, so that every system is
  3955. initialized before the ones that (theoretically) depend on it.
  3956. Fixes bug 33316; bugfix on 0.4.0.1-alpha.
  3957. o Minor bugfixes (IPv4, relay):
  3958. - Check for invalid zero IPv4 addresses and ports when sending and
  3959. receiving extend cells. Fixes bug 33900; bugfix on 0.2.4.8-alpha.
  3960. o Minor bugfixes (IPv6, relay):
  3961. - Consider IPv6 addresses when checking if a connection is
  3962. canonical. In 17604, relays assumed that a remote relay could
  3963. consider an IPv6 connection canonical, but did not set the
  3964. canonical flag on their side of the connection. Fixes bug 33899;
  3965. bugfix on 0.3.1.1-alpha.
  3966. - Log IPv6 addresses on connections where this relay is the
  3967. responder. Previously, responding relays would replace the remote
  3968. IPv6 address with the IPv4 address from the consensus. Fixes bug
  3969. 33899; bugfix on 0.3.1.1-alpha.
  3970. o Minor bugfixes (linux seccomp sandbox nss):
  3971. - Fix a startup crash when tor is compiled with --enable-nss and
  3972. sandbox support is enabled. Fixes bug 34130; bugfix on
  3973. 0.3.5.1-alpha. Patch by Daniel Pinto.
  3974. o Minor bugfixes (logging, testing):
  3975. - Make all of tor's assertion macros support the ALL_BUGS_ARE_FATAL
  3976. and DISABLE_ASSERTS_IN_UNIT_TESTS debugging modes. (IF_BUG_ONCE()
  3977. used to log a non-fatal warning, regardless of the debugging
  3978. mode.) Fixes bug 33917; bugfix on 0.2.9.1-alpha.
  3979. o Minor bugfixes (logs):
  3980. - Remove surprising empty line in the INFO-level log about circuit
  3981. build timeout. Fixes bug 33531; bugfix on 0.3.3.1-alpha.
  3982. o Minor bugfixes (mainloop):
  3983. - Better guard against growing a buffer past its maximum 2GB in
  3984. size. Fixes bug 33131; bugfix on 0.3.0.4-rc.
  3985. o Minor bugfixes (manual page):
  3986. - Update the man page to reflect that MinUptimeHidServDirectoryV2
  3987. defaults to 96 hours. Fixes bug 34299; bugfix on 0.2.6.3-alpha.
  3988. o Minor bugfixes (onion service v3, client):
  3989. - Remove a BUG() that was causing a stacktrace when a descriptor
  3990. changed at an unexpected time. Fixes bug 28992; bugfix
  3991. on 0.3.2.1-alpha.
  3992. o Minor bugfixes (onion service, logging):
  3993. - Fix a typo in a log message PublishHidServDescriptors is set to 0.
  3994. Fixes bug 33779; bugfix on 0.3.2.1-alpha.
  3995. o Minor bugfixes (portability):
  3996. - Fix a portability error in the configure script, where we were
  3997. using "==" instead of "=". Fixes bug 34233; bugfix on 0.4.3.5.
  3998. o Minor bugfixes (protocol versions):
  3999. - Sort tor's supported protocol version lists, as recommended by the
  4000. tor directory specification. Fixes bug 33285; bugfix
  4001. on 0.4.0.1-alpha.
  4002. o Minor bugfixes (relays):
  4003. - Stop advertising incorrect IPv6 ORPorts in relay and bridge
  4004. descriptors, when the IPv6 port was configured as "auto". Fixes
  4005. bug 32588; bugfix on 0.2.3.9-alpha.
  4006. o Code simplification and refactoring:
  4007. - Define and use a new constant TOR_ADDRPORT_BUF_LEN which is like
  4008. TOR_ADDR_BUF_LEN but includes enough space for an IP address,
  4009. brackets, separating colon, and port number. Closes ticket 33956.
  4010. Patch by Neel Chauhan.
  4011. - Merge the orconn and ocirc events into the "core" subsystem, which
  4012. manages or connections and origin circuits. Previously they were
  4013. isolated in subsystems of their own.
  4014. - Move LOG_PROTOCOL_WARN to app/config. Resolves a dependency
  4015. inversion. Closes ticket 33633.
  4016. - Move the circuit extend code to the relay module. Split the
  4017. circuit extend function into smaller functions. Closes
  4018. ticket 33633.
  4019. - Rewrite port_parse_config() to use the default port flags from
  4020. port_cfg_new(). Closes ticket 32994. Patch by MrSquanchee.
  4021. - Updated comments in 'scheduler.c' to reflect old code changes, and
  4022. simplified the scheduler channel state change code. Closes
  4023. ticket 33349.
  4024. o Documentation:
  4025. - Document the limitations of using %include on config files with
  4026. seccomp sandbox enabled. Fixes documentation bug 34133; bugfix on
  4027. 0.3.1.1-alpha. Patch by Daniel Pinto.
  4028. - Fix several doxygen warnings related to imbalanced groups. Closes
  4029. ticket 34255.
  4030. o Removed features:
  4031. - Remove the ClientAutoIPv6ORPort option. This option attempted to
  4032. randomly choose between IPv4 and IPv6 for client connections, and
  4033. wasn't a true implementation of Happy Eyeballs. Often, this option
  4034. failed on IPv4-only or IPv6-only connections. Closes ticket 32905.
  4035. Patch by Neel Chauhan.
  4036. - Stop shipping contrib/dist/rc.subr file, as it is not being used
  4037. on FreeBSD anymore. Closes issue 31576.
  4038. o Testing:
  4039. - Add a basic IPv6 test to "make test-network". This test only runs
  4040. when the local machine has an IPv6 stack. Closes ticket 33300.
  4041. - Add test-network-ipv4 and test-network-ipv6 jobs to the Makefile.
  4042. These jobs run the IPv4-only and dual-stack chutney flavours from
  4043. test-network-all. Closes ticket 33280.
  4044. - Remove a redundant distcheck job. Closes ticket 33194.
  4045. - Run the test-network-ipv6 Makefile target in the Travis CI IPv6
  4046. chutney job. This job runs on macOS, so it's a bit slow. Closes
  4047. ticket 33303.
  4048. - Sort the Travis jobs in order of speed. Putting the slowest jobs
  4049. first takes full advantage of Travis job concurrency. Closes
  4050. ticket 33194.
  4051. - Stop allowing the Chutney IPv6 Travis job to fail. This job was
  4052. previously configured to fast_finish (which requires
  4053. allow_failure), to speed up the build. Closes ticket 33195.
  4054. - Test v3 onion services to tor's mixed IPv4 chutney network. And
  4055. add a mixed IPv6 chutney network. These networks are used in the
  4056. test-network-all, test-network-ipv4, and test-network-ipv6 make
  4057. targets. Closes ticket 33334.
  4058. - Use the "bridges+hs-v23" chutney network flavour in "make test-
  4059. network". This test requires a recent version of chutney (mid-
  4060. February 2020). Closes ticket 28208.
  4061. - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
  4062. tool to produce detailed diagnostic output. Closes ticket 32792.
  4063. o Code simplification and refactoring (onion service):
  4064. - Refactor configuration parsing to use the new config subsystem
  4065. code. Closes ticket 33014.
  4066. o Code simplification and refactoring (relay address):
  4067. - Move a series of functions related to address resolving into their
  4068. own files. Closes ticket 33789.
  4069. o Documentation (manual page):
  4070. - Add cross reference links and a table of contents to the HTML tor
  4071. manual page. Closes ticket 33369. Work by Swati Thacker as part of
  4072. Google Season of Docs.
  4073. - Alphabetize the Denial of Service Mitigation Options, Directory
  4074. Authority Server Options, Hidden Service Options, and Testing
  4075. Network Options sections of the tor(1) manual page. Closes ticket
  4076. 33275. Work by Swati Thacker as part of Google Season of Docs.
  4077. - Refrain from mentioning nicknames in manpage section for MyFamily
  4078. torrc option. Resolves issue 33417.
  4079. - Updated the options set by TestingTorNetwork in the manual page.
  4080. Closes ticket 33778.
  4081. Changes in version 0.4.3.5 - 2020-05-15
  4082. Tor 0.4.3.5 is the first stable release in the 0.4.3.x series. This
  4083. series adds support for building without relay code enabled, and
  4084. implements functionality needed for OnionBalance with v3 onion
  4085. services. It includes significant refactoring of our configuration and
  4086. controller functionality, and fixes numerous smaller bugs and
  4087. performance issues.
  4088. Per our support policy, we support each stable release series for nine
  4089. months after its first stable release, or three months after the first
  4090. stable release of the next series: whichever is longer. This means
  4091. that 0.4.3.x will be supported until around February 2021--later, if
  4092. 0.4.4.x is later than anticipated.
  4093. Note also that support for 0.4.1.x is about to end on May 20 of this
  4094. year; 0.4.2.x will be supported until September 15. We still plan to
  4095. continue supporting 0.3.5.x, our long-term stable series, until
  4096. Feb 2022.
  4097. Below are the changes since 0.4.3.4-rc. For a complete list of changes
  4098. since 0.4.2.6, see the ReleaseNotes file.
  4099. o Minor bugfixes (compiler compatibility):
  4100. - Avoid compiler warnings from Clang 10 related to the use of GCC-
  4101. style "/* falls through */" comments. Both Clang and GCC allow
  4102. __attribute__((fallthrough)) instead, so that's what we're using
  4103. now. Fixes bug 34078; bugfix on 0.3.1.3-alpha.
  4104. - Fix compilation warnings with GCC 10.0.1. Fixes bug 34077; bugfix
  4105. on 0.4.0.3-alpha.
  4106. o Minor bugfixes (logging):
  4107. - Stop truncating IPv6 addresses and ports in channel and connection
  4108. logs. Fixes bug 33918; bugfix on 0.2.4.4-alpha.
  4109. - Fix a logic error in a log message about whether an address was
  4110. invalid. Previously, the code would never report that onion
  4111. addresses were onion addresses. Fixes bug 34131; bugfix
  4112. on 0.4.3.1-alpha.
  4113. Changes in version 0.4.3.4-rc - 2020-04-13
  4114. Tor 0.4.3.4-rc is the first release candidate in its series. It fixes
  4115. several bugs from earlier versions, including one affecting DoS
  4116. defenses on bridges using pluggable transports.
  4117. o Major bugfixes (DoS defenses, bridges, pluggable transport):
  4118. - Fix a bug that was preventing DoS defenses from running on bridges
  4119. with a pluggable transport. Previously, the DoS subsystem was not
  4120. given the transport name of the client connection, thus failed to
  4121. find the GeoIP cache entry for that client address. Fixes bug
  4122. 33491; bugfix on 0.3.3.2-alpha.
  4123. o Minor feature (sendme, flow control):
  4124. - Default to sending SENDME version 1 cells. (Clients are already
  4125. sending these, because of a consensus parameter telling them to do
  4126. so: this change only affects what clients would do if the
  4127. consensus didn't contain a recommendation.) Closes ticket 33623.
  4128. o Minor features (testing):
  4129. - The unit tests now support a "TOR_SKIP_TESTCASES" environment
  4130. variable to specify a list of space-separated test cases that
  4131. should not be executed. We will use this to disable certain tests
  4132. that are failing on Appveyor because of mismatched OpenSSL
  4133. libraries. Part of ticket 33643.
  4134. o Minor bugfixes (--disable-module-relay):
  4135. - Fix an assertion failure when Tor is built without the relay
  4136. module, and then invoked with the "User" option. Fixes bug 33668;
  4137. bugfix on 0.4.3.1-alpha.
  4138. o Minor bugfixes (--disable-module-relay,--disable-module-dirauth):
  4139. - Set some output arguments in the relay and dirauth module stubs,
  4140. to guard against future stub argument handling bugs like 33668.
  4141. Fixes bug 33674; bugfix on 0.4.3.1-alpha.
  4142. o Minor bugfixes (build system):
  4143. - Correctly output the enabled module in the configure summary.
  4144. Before that, the list shown was just plain wrong. Fixes bug 33646;
  4145. bugfix on 0.4.3.2-alpha.
  4146. o Minor bugfixes (client, IPv6):
  4147. - Stop forcing all non-SocksPorts to prefer IPv6 exit connections.
  4148. Instead, prefer IPv6 connections by default, but allow users to
  4149. change their configs using the "NoPreferIPv6" port flag. Fixes bug
  4150. 33608; bugfix on 0.4.3.1-alpha.
  4151. - Revert PreferIPv6 set by default on the SocksPort because it broke
  4152. the torsocks use case. Tor doesn't have a way for an application
  4153. to request the hostname to be resolved for a specific IP version,
  4154. but torsocks requires that. Up until now, IPv4 was used by default
  4155. so torsocks is expecting that, and can't handle a possible IPv6
  4156. being returned. Fixes bug 33804; bugfix on 0.4.3.1-alpha.
  4157. o Minor bugfixes (key portability):
  4158. - When reading PEM-encoded key data, tolerate CRLF line-endings even
  4159. if we are not running on Windows. Previously, non-Windows hosts
  4160. would reject these line-endings in certain positions, making
  4161. certain key files hard to move from one host to another. Fixes bug
  4162. 33032; bugfix on 0.3.5.1-alpha.
  4163. o Minor bugfixes (logging):
  4164. - Flush stderr, stdout, and file logs during shutdown, if supported
  4165. by the OS. This change helps make sure that any final logs are
  4166. recorded. Fixes bug 33087; bugfix on 0.4.1.6.
  4167. - Stop closing stderr and stdout during shutdown. Closing these file
  4168. descriptors can hide sanitiser logs. Fixes bug 33087; bugfix
  4169. on 0.4.1.6.
  4170. o Minor bugfixes (onion services v3):
  4171. - Relax severity of a log message that can appear naturally when
  4172. decoding onion service descriptors as a relay. Also add some
  4173. diagnostics to debug any future bugs in that area. Fixes bug
  4174. 31669; bugfix on 0.3.0.1-alpha.
  4175. - Block a client-side assertion by disallowing the registration of
  4176. an x25519 client auth key that's all zeroes. Fixes bug 33545;
  4177. bugfix on 0.4.3.1-alpha. Based on patch from "cypherpunks".
  4178. o Code simplification and refactoring:
  4179. - Disable our coding standards best practices tracker in our git
  4180. hooks. (0.4.3 branches only.) Closes ticket 33678.
  4181. o Testing:
  4182. - Avoid conflicts between the fake sockets in tor's unit tests, and
  4183. real file descriptors. Resolves issues running unit tests with
  4184. GitHub Actions, where the process that embeds or launches the
  4185. tests has already opened a large number of file descriptors. Fixes
  4186. bug 33782; bugfix on 0.2.8.1-alpha. Found and fixed by
  4187. Putta Khunchalee.
  4188. o Testing (CI):
  4189. - In our Appveyor Windows CI, copy required DLLs to test and app
  4190. directories, before running tor's tests. This ensures that tor.exe
  4191. and test*.exe use the correct version of each DLL. This fix is not
  4192. required, but we hope it will avoid DLL search issues in future.
  4193. Fixes bug 33673; bugfix on 0.3.4.2-alpha.
  4194. - On Appveyor, skip the crypto/openssl_version test, which is
  4195. failing because of a mismatched library installation. Fix
  4196. for 33643.
  4197. Changes in version 0.4.3.3-alpha - 2020-03-18
  4198. Tor 0.4.3.3-alpha fixes several bugs in previous releases, including
  4199. TROVE-2020-002, a major denial-of-service vulnerability that affected
  4200. all released Tor instances since 0.2.1.5-alpha. Using this
  4201. vulnerability, an attacker could cause Tor instances to consume a huge
  4202. amount of CPU, disrupting their operations for several seconds or
  4203. minutes. This attack could be launched by anybody against a relay, or
  4204. by a directory cache against any client that had connected to it. The
  4205. attacker could launch this attack as much as they wanted, thereby
  4206. disrupting service or creating patterns that could aid in traffic
  4207. analysis. This issue was found by OSS-Fuzz, and is also tracked
  4208. as CVE-2020-10592.
  4209. We do not have reason to believe that this attack is currently being
  4210. exploited in the wild, but nonetheless we advise everyone to upgrade
  4211. as soon as packages are available.
  4212. o Major bugfixes (security, denial-of-service):
  4213. - Fix a denial-of-service bug that could be used by anyone to
  4214. consume a bunch of CPU on any Tor relay or authority, or by
  4215. directories to consume a bunch of CPU on clients or hidden
  4216. services. Because of the potential for CPU consumption to
  4217. introduce observable timing patterns, we are treating this as a
  4218. high-severity security issue. Fixes bug 33119; bugfix on
  4219. 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
  4220. as TROVE-2020-002 and CVE-2020-10592.
  4221. o Major bugfixes (circuit padding, memory leak):
  4222. - Avoid a remotely triggered memory leak in the case that a circuit
  4223. padding machine is somehow negotiated twice on the same circuit.
  4224. Fixes bug 33619; bugfix on 0.4.0.1-alpha. Found by Tobias Pulls.
  4225. This is also tracked as TROVE-2020-004 and CVE-2020-10593.
  4226. o Major bugfixes (directory authority):
  4227. - Directory authorities will now send a 503 (not enough bandwidth)
  4228. code to clients when under bandwidth pressure. Known relays and
  4229. other authorities will always be answered regardless of the
  4230. bandwidth situation. Fixes bug 33029; bugfix on 0.1.2.5-alpha.
  4231. o Minor features (diagnostic):
  4232. - Improve assertions and add some memory-poisoning code to try to
  4233. track down possible causes of a rare crash (32564) in the EWMA
  4234. code. Closes ticket 33290.
  4235. o Minor features (directory authorities):
  4236. - Directory authorities now reject descriptors from relays running
  4237. Tor versions from the 0.2.9 and 0.4.0 series. The 0.3.5 series is
  4238. still allowed. Resolves ticket 32672. Patch by Neel Chauhan.
  4239. o Minor features (usability):
  4240. - Include more information when failing to parse a configuration
  4241. value. This should make it easier to tell what's going wrong when
  4242. a configuration file doesn't parse. Closes ticket 33460.
  4243. o Minor bugfix (relay, configuration):
  4244. - Warn if the ContactInfo field is not set, and tell the relay
  4245. operator that not having a ContactInfo field set might cause their
  4246. relay to get rejected in the future. Fixes bug 33361; bugfix
  4247. on 0.1.1.10-alpha.
  4248. o Minor bugfixes (coding best practices checks):
  4249. - Allow the "practracker" script to read unicode files when using
  4250. Python 2. We made the script use unicode literals in 0.4.3.1-alpha,
  4251. but didn't change the codec for opening files. Fixes bug 33374;
  4252. bugfix on 0.4.3.1-alpha.
  4253. o Minor bugfixes (continuous integration):
  4254. - Remove the buggy and unused mirroring job. Fixes bug 33213; bugfix
  4255. on 0.3.2.2-alpha.
  4256. o Minor bugfixes (onion service v3, client):
  4257. - Remove a BUG() warning that would cause a stack trace if an onion
  4258. service descriptor was freed while we were waiting for a
  4259. rendezvous circuit to complete. Fixes bug 28992; bugfix
  4260. on 0.3.2.1-alpha.
  4261. o Minor bugfixes (onion services v3):
  4262. - Fix an assertion failure that could result from a corrupted
  4263. ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
  4264. bugfix on 0.3.3.1-alpha. This issue is also tracked
  4265. as TROVE-2020-003.
  4266. o Documentation (manpage):
  4267. - Alphabetize the Server and Directory server sections of the tor
  4268. manpage. Also split Statistics options into their own section of
  4269. the manpage. Closes ticket 33188. Work by Swati Thacker as part of
  4270. Google Season of Docs.
  4271. - Document the __OwningControllerProcess torrc option and specify
  4272. its polling interval. Resolves issue 32971.
  4273. o Testing (Travis CI):
  4274. - Remove a redundant distcheck job. Closes ticket 33194.
  4275. - Sort the Travis jobs in order of speed: putting the slowest jobs
  4276. first takes full advantage of Travis job concurrency. Closes
  4277. ticket 33194.
  4278. - Stop allowing the Chutney IPv6 Travis job to fail. This job was
  4279. previously configured to fast_finish (which requires
  4280. allow_failure), to speed up the build. Closes ticket 33195.
  4281. - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
  4282. tool to produce detailed diagnostic output. Closes ticket 32792.
  4283. Changes in version 0.4.2.7 - 2020-03-18
  4284. This is the third stable release in the 0.4.2.x series. It backports
  4285. numerous fixes from later releases, including a fix for TROVE-2020-
  4286. 002, a major denial-of-service vulnerability that affected all
  4287. released Tor instances since 0.2.1.5-alpha. Using this vulnerability,
  4288. an attacker could cause Tor instances to consume a huge amount of CPU,
  4289. disrupting their operations for several seconds or minutes. This
  4290. attack could be launched by anybody against a relay, or by a directory
  4291. cache against any client that had connected to it. The attacker could
  4292. launch this attack as much as they wanted, thereby disrupting service
  4293. or creating patterns that could aid in traffic analysis. This issue
  4294. was found by OSS-Fuzz, and is also tracked as CVE-2020-10592.
  4295. We do not have reason to believe that this attack is currently being
  4296. exploited in the wild, but nonetheless we advise everyone to upgrade
  4297. as soon as packages are available.
  4298. o Major bugfixes (security, denial-of-service, backport from 0.4.3.3-alpha):
  4299. - Fix a denial-of-service bug that could be used by anyone to
  4300. consume a bunch of CPU on any Tor relay or authority, or by
  4301. directories to consume a bunch of CPU on clients or hidden
  4302. services. Because of the potential for CPU consumption to
  4303. introduce observable timing patterns, we are treating this as a
  4304. high-severity security issue. Fixes bug 33119; bugfix on
  4305. 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
  4306. as TROVE-2020-002 and CVE-2020-10592.
  4307. o Major bugfixes (circuit padding, memory leak, backport from 0.4.3.3-alpha):
  4308. - Avoid a remotely triggered memory leak in the case that a circuit
  4309. padding machine is somehow negotiated twice on the same circuit.
  4310. Fixes bug 33619; bugfix on 0.4.0.1-alpha. Found by Tobias Pulls.
  4311. This is also tracked as TROVE-2020-004 and CVE-2020-10593.
  4312. o Major bugfixes (directory authority, backport from 0.4.3.3-alpha):
  4313. - Directory authorities will now send a 503 (not enough bandwidth)
  4314. code to clients when under bandwidth pressure. Known relays and
  4315. other authorities will always be answered regardless of the
  4316. bandwidth situation. Fixes bug 33029; bugfix on 0.1.2.5-alpha.
  4317. o Minor features (continuous integration, backport from 0.4.3.2-alpha):
  4318. - Stop allowing failures on the Travis CI stem tests job. It looks
  4319. like all the stem hangs we were seeing before are now fixed.
  4320. Closes ticket 33075.
  4321. o Minor bugfixes (bridges, backport from 0.4.3.1-alpha):
  4322. - Lowercase the configured value of BridgeDistribution before adding
  4323. it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
  4324. o Minor bugfixes (logging, backport from 0.4.3.2-alpha):
  4325. - If we encounter a bug when flushing a buffer to a TLS connection,
  4326. only log the bug once per invocation of the Tor process.
  4327. Previously we would log with every occurrence, which could cause
  4328. us to run out of disk space. Fixes bug 33093; bugfix
  4329. on 0.3.2.2-alpha.
  4330. o Minor bugfixes (onion services v3, backport from 0.4.3.3-alpha):
  4331. - Fix an assertion failure that could result from a corrupted
  4332. ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
  4333. bugfix on 0.3.3.1-alpha. This issue is also tracked
  4334. as TROVE-2020-003.
  4335. o Minor bugfixes (rust, build, backport from 0.4.3.2-alpha):
  4336. - Fix a syntax warning given by newer versions of Rust that was
  4337. creating problems for our continuous integration. Fixes bug 33212;
  4338. bugfix on 0.3.5.1-alpha.
  4339. o Testing (Travis CI, backport from 0.4.3.3-alpha):
  4340. - Remove a redundant distcheck job. Closes ticket 33194.
  4341. - Sort the Travis jobs in order of speed: putting the slowest jobs
  4342. first takes full advantage of Travis job concurrency. Closes
  4343. ticket 33194.
  4344. - Stop allowing the Chutney IPv6 Travis job to fail. This job was
  4345. previously configured to fast_finish (which requires
  4346. allow_failure), to speed up the build. Closes ticket 33195.
  4347. - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
  4348. tool to produce detailed diagnostic output. Closes ticket 32792.
  4349. Changes in version 0.4.1.9 - 2020-03-18
  4350. Tor 0.4.1.9 backports important fixes from later Tor releases,
  4351. including a fix for TROVE-2020-002, a major denial-of-service
  4352. vulnerability that affected all released Tor instances since
  4353. 0.2.1.5-alpha. Using this vulnerability, an attacker could cause Tor
  4354. instances to consume a huge amount of CPU, disrupting their operations
  4355. for several seconds or minutes. This attack could be launched by
  4356. anybody against a relay, or by a directory cache against any client
  4357. that had connected to it. The attacker could launch this attack as
  4358. much as they wanted, thereby disrupting service or creating patterns
  4359. that could aid in traffic analysis. This issue was found by OSS-Fuzz,
  4360. and is also tracked as CVE-2020-10592.
  4361. We do not have reason to believe that this attack is currently being
  4362. exploited in the wild, but nonetheless we advise everyone to upgrade
  4363. as soon as packages are available.
  4364. o Major bugfixes (security, denial-of-service, backport from 0.4.3.3-alpha):
  4365. - Fix a denial-of-service bug that could be used by anyone to
  4366. consume a bunch of CPU on any Tor relay or authority, or by
  4367. directories to consume a bunch of CPU on clients or hidden
  4368. services. Because of the potential for CPU consumption to
  4369. introduce observable timing patterns, we are treating this as a
  4370. high-severity security issue. Fixes bug 33119; bugfix on
  4371. 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
  4372. as TROVE-2020-002 and CVE-2020-10592.
  4373. o Major bugfixes (circuit padding, memory leak, backport from 0.4.3.3-alpha):
  4374. - Avoid a remotely triggered memory leak in the case that a circuit
  4375. padding machine is somehow negotiated twice on the same circuit.
  4376. Fixes bug 33619; bugfix on 0.4.0.1-alpha. Found by Tobias Pulls.
  4377. This is also tracked as TROVE-2020-004 and CVE-2020-10593.
  4378. o Minor bugfixes (bridges, backport from 0.4.3.1-alpha):
  4379. - Lowercase the configured value of BridgeDistribution before adding
  4380. it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
  4381. o Minor bugfixes (logging, backport from 0.4.3.2-alpha):
  4382. - If we encounter a bug when flushing a buffer to a TLS connection,
  4383. only log the bug once per invocation of the Tor process.
  4384. Previously we would log with every occurrence, which could cause
  4385. us to run out of disk space. Fixes bug 33093; bugfix
  4386. on 0.3.2.2-alpha.
  4387. o Minor bugfixes (onion services v3, backport from 0.4.3.3-alpha):
  4388. - Fix an assertion failure that could result from a corrupted
  4389. ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
  4390. bugfix on 0.3.3.1-alpha. This issue is also tracked
  4391. as TROVE-2020-003.
  4392. o Minor bugfixes (rust, build, backport from 0.4.3.2-alpha):
  4393. - Fix a syntax warning given by newer versions of Rust that was
  4394. creating problems for our continuous integration. Fixes bug 33212;
  4395. bugfix on 0.3.5.1-alpha.
  4396. o Testing (Travis CI, backport from 0.4.3.3-alpha):
  4397. - Remove a redundant distcheck job. Closes ticket 33194.
  4398. - Sort the Travis jobs in order of speed: putting the slowest jobs
  4399. first takes full advantage of Travis job concurrency. Closes
  4400. ticket 33194.
  4401. - Stop allowing the Chutney IPv6 Travis job to fail. This job was
  4402. previously configured to fast_finish (which requires
  4403. allow_failure), to speed up the build. Closes ticket 33195.
  4404. - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
  4405. tool to produce detailed diagnostic output. Closes ticket 32792.
  4406. Changes in version 0.3.5.10 - 2020-03-18
  4407. Tor 0.3.5.10 backports many fixes from later Tor releases, including a
  4408. fix for TROVE-2020-002, a major denial-of-service vulnerability that
  4409. affected all released Tor instances since 0.2.1.5-alpha. Using this
  4410. vulnerability, an attacker could cause Tor instances to consume a huge
  4411. amount of CPU, disrupting their operations for several seconds or
  4412. minutes. This attack could be launched by anybody against a relay, or
  4413. by a directory cache against any client that had connected to it. The
  4414. attacker could launch this attack as much as they wanted, thereby
  4415. disrupting service or creating patterns that could aid in traffic
  4416. analysis. This issue was found by OSS-Fuzz, and is also tracked
  4417. as CVE-2020-10592.
  4418. We do not have reason to believe that this attack is currently being
  4419. exploited in the wild, but nonetheless we advise everyone to upgrade
  4420. as soon as packages are available.
  4421. o Major bugfixes (security, denial-of-service, backport from 0.4.3.3-alpha):
  4422. - Fix a denial-of-service bug that could be used by anyone to
  4423. consume a bunch of CPU on any Tor relay or authority, or by
  4424. directories to consume a bunch of CPU on clients or hidden
  4425. services. Because of the potential for CPU consumption to
  4426. introduce observable timing patterns, we are treating this as a
  4427. high-severity security issue. Fixes bug 33119; bugfix on
  4428. 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
  4429. as TROVE-2020-002 and CVE-2020-10592.
  4430. o Major bugfixes (linux seccomp sandbox, backport from 0.4.3.1-alpha):
  4431. - Correct how we use libseccomp. Particularly, stop assuming that
  4432. rules are applied in a particular order or that more rules are
  4433. processed after the first match. Neither is the case! In
  4434. libseccomp <2.4.0 this lead to some rules having no effect.
  4435. libseccomp 2.4.0 changed how rules are generated, leading to a
  4436. different ordering, which in turn led to a fatal crash during
  4437. startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
  4438. Peter Gerber.
  4439. o Minor features (continuous integration, backport from 0.4.3.2-alpha):
  4440. - Stop allowing failures on the Travis CI stem tests job. It looks
  4441. like all the stem hangs we were seeing before are now fixed.
  4442. Closes ticket 33075.
  4443. o Minor bugfixes (bridges, backport from 0.4.3.1-alpha):
  4444. - Lowercase the configured value of BridgeDistribution before adding
  4445. it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
  4446. o Minor bugfixes (crash, backport from 0.4.2.4-rc):
  4447. - When running Tor with an option like --verify-config or
  4448. --dump-config that does not start the event loop, avoid crashing
  4449. if we try to exit early because of an error. Fixes bug 32407;
  4450. bugfix on 0.3.3.1-alpha.
  4451. o Minor bugfixes (logging, backport from 0.4.3.2-alpha):
  4452. - If we encounter a bug when flushing a buffer to a TLS connection,
  4453. only log the bug once per invocation of the Tor process.
  4454. Previously we would log with every occurrence, which could cause
  4455. us to run out of disk space. Fixes bug 33093; bugfix
  4456. on 0.3.2.2-alpha.
  4457. o Minor bugfixes (onion services v3, backport from 0.4.3.3-alpha):
  4458. - Fix an assertion failure that could result from a corrupted
  4459. ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
  4460. bugfix on 0.3.3.1-alpha. This issue is also tracked
  4461. as TROVE-2020-003.
  4462. o Minor bugfixes (rust, build, backport from 0.4.3.2-alpha):
  4463. - Fix a syntax warning given by newer versions of Rust that was
  4464. creating problems for our continuous integration. Fixes bug 33212;
  4465. bugfix on 0.3.5.1-alpha.
  4466. o Testing (backport from 0.4.3.1-alpha):
  4467. - Re-enable the Travis CI macOS Chutney build, but don't let it
  4468. prevent the Travis job from finishing. (The Travis macOS jobs are
  4469. slow, so we don't want to have it delay the whole CI process.)
  4470. Closes ticket 32629.
  4471. - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
  4472. Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
  4473. fix the sandbox errors in 32722. Closes ticket 32240.
  4474. o Testing (continuous integration, backport from 0.4.3.1-alpha):
  4475. - Use zstd in our Travis Linux builds. Closes ticket 32242.
  4476. o Testing (Travis CI, backport from 0.4.3.3-alpha):
  4477. - Remove a redundant distcheck job. Closes ticket 33194.
  4478. - Sort the Travis jobs in order of speed: putting the slowest jobs
  4479. first takes full advantage of Travis job concurrency. Closes
  4480. ticket 33194.
  4481. - Stop allowing the Chutney IPv6 Travis job to fail. This job was
  4482. previously configured to fast_finish (which requires
  4483. - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
  4484. tool to produce detailed diagnostic output. Closes ticket 32792.
  4485. Changes in version 0.4.3.2-alpha - 2020-02-10
  4486. This is the second stable alpha release in the Tor 0.4.3.x series. It
  4487. fixes several bugs present in the previous alpha release. Anybody
  4488. running the previous alpha should upgrade, and look for bugs in this
  4489. one instead.
  4490. o Major bugfixes (onion service client, authorization):
  4491. - On a NEWNYM signal, purge entries from the ephemeral client
  4492. authorization cache. The permanent ones are kept. Fixes bug 33139;
  4493. bugfix on 0.4.3.1-alpha.
  4494. o Minor features (best practices tracker):
  4495. - Practracker now supports a --regen-overbroad option to regenerate
  4496. the exceptions file, but only to revise exceptions to be _less_
  4497. tolerant of best-practices violations. Closes ticket 32372.
  4498. o Minor features (continuous integration):
  4499. - Run Doxygen Makefile target on Travis, so we can learn about
  4500. regressions in our internal documentation. Closes ticket 32455.
  4501. - Stop allowing failures on the Travis CI stem tests job. It looks
  4502. like all the stem hangs we were seeing before are now fixed.
  4503. Closes ticket 33075.
  4504. o Minor bugfixes (build system):
  4505. - Revise configure options that were either missing or incorrect in
  4506. the configure summary. Fixes bug 32230; bugfix on 0.4.3.1-alpha.
  4507. o Minor bugfixes (controller protocol):
  4508. - Fix a memory leak introduced by refactoring of control reply
  4509. formatting code. Fixes bug 33039; bugfix on 0.4.3.1-alpha.
  4510. - Fix a memory leak in GETINFO responses. Fixes bug 33103; bugfix
  4511. on 0.4.3.1-alpha.
  4512. - When receiving "ACTIVE" or "DORMANT" signals on the control port,
  4513. report them as SIGNAL events. Previously we would log a bug
  4514. warning. Fixes bug 33104; bugfix on 0.4.0.1-alpha.
  4515. o Minor bugfixes (logging):
  4516. - If we encounter a bug when flushing a buffer to a TLS connection,
  4517. only log the bug once per invocation of the Tor process.
  4518. Previously we would log with every occurrence, which could cause
  4519. us to run out of disk space. Fixes bug 33093; bugfix
  4520. on 0.3.2.2-alpha.
  4521. - When logging a bug, do not say "Future instances of this warning
  4522. will be silenced" unless we are actually going to silence them.
  4523. Previously we would say this whenever a BUG() check failed in the
  4524. code. Fixes bug 33095; bugfix on 0.4.1.1-alpha.
  4525. o Minor bugfixes (onion service v2):
  4526. - Move a series of v2 onion service warnings to protocol-warning
  4527. level because they can all be triggered remotely by a malformed
  4528. request. Fixes bug 32706; bugfix on 0.1.1.14-alpha.
  4529. o Minor bugfixes (onion service v3, client authorization):
  4530. - When removing client authorization credentials using the control
  4531. port, also remove the associated descriptor, so the onion service
  4532. can no longer be contacted. Fixes bug 33148; bugfix
  4533. on 0.4.3.1-alpha.
  4534. o Minor bugfixes (pluggable transports):
  4535. - When receiving a message on standard error from a pluggable
  4536. transport, log it at info level, rather than as a warning. Fixes
  4537. bug 33005; bugfix on 0.4.0.1-alpha.
  4538. o Minor bugfixes (rust, build):
  4539. - Fix a syntax warning given by newer versions of Rust that was
  4540. creating problems for our continuous integration. Fixes bug 33212;
  4541. bugfix on 0.3.5.1-alpha.
  4542. o Minor bugfixes (TLS bug handling):
  4543. - When encountering a bug in buf_read_from_tls(), return a "MISC"
  4544. error code rather than "WANTWRITE". This change might help avoid
  4545. some CPU-wasting loops if the bug is ever triggered. Bug reported
  4546. by opara. Fixes bug 32673; bugfix on 0.3.0.4-alpha.
  4547. o Code simplification and refactoring (mainloop):
  4548. - Simplify the ip_address_changed() function by removing redundant
  4549. checks. Closes ticket 33091.
  4550. o Documentation (manpage):
  4551. - Split "Circuit Timeout" options and "Node Selection" options into
  4552. their own sections of the tor manpage. Closes tickets 32928 and
  4553. 32929. Work by Swati Thacker as part of Google Season of Docs.
  4554. Changes in version 0.4.2.6 - 2020-01-30
  4555. This is the second stable release in the 0.4.2.x series. It backports
  4556. several bugfixes from 0.4.3.1-alpha, including some that had affected
  4557. the Linux seccomp2 sandbox or Windows services. If you're running with
  4558. one of those configurations, you'll probably want to upgrade;
  4559. otherwise, you should be fine with 0.4.2.5.
  4560. o Major bugfixes (linux seccomp sandbox, backport from 0.4.3.1-alpha):
  4561. - Correct how we use libseccomp. Particularly, stop assuming that
  4562. rules are applied in a particular order or that more rules are
  4563. processed after the first match. Neither is the case! In
  4564. libseccomp <2.4.0 this led to some rules having no effect.
  4565. libseccomp 2.4.0 changed how rules are generated, leading to a
  4566. different ordering, which in turn led to a fatal crash during
  4567. startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
  4568. Peter Gerber.
  4569. - Fix crash when reloading logging configuration while the
  4570. experimental sandbox is enabled. Fixes bug 32841; bugfix on
  4571. 0.4.1.7. Patch by Peter Gerber.
  4572. o Minor bugfixes (correctness checks, backport from 0.4.3.1-alpha):
  4573. - Use GCC/Clang's printf-checking feature to make sure that
  4574. tor_assertf() arguments are correctly typed. Fixes bug 32765;
  4575. bugfix on 0.4.1.1-alpha.
  4576. o Minor bugfixes (logging, crash, backport from 0.4.3.1-alpha):
  4577. - Avoid a possible crash when trying to log a (fatal) assertion
  4578. failure about mismatched magic numbers in configuration objects.
  4579. Fixes bug 32771; bugfix on 0.4.2.1-alpha.
  4580. o Minor bugfixes (testing, backport from 0.4.3.1-alpha):
  4581. - When TOR_DISABLE_PRACTRACKER is set, do not apply it to the
  4582. test_practracker.sh script. Doing so caused a test failure. Fixes
  4583. bug 32705; bugfix on 0.4.2.1-alpha.
  4584. - When TOR_DISABLE_PRACTRACKER is set, log a notice to stderr when
  4585. skipping practracker checks. Fixes bug 32705; bugfix
  4586. on 0.4.2.1-alpha.
  4587. o Minor bugfixes (windows service, backport from 0.4.3.1-alpha):
  4588. - Initialize the publish/subscribe system when running as a windows
  4589. service. Fixes bug 32778; bugfix on 0.4.1.1-alpha.
  4590. o Testing (backport from 0.4.3.1-alpha):
  4591. - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
  4592. Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
  4593. fix the sandbox errors in 32722. Closes ticket 32240.
  4594. - Re-enable the Travis CI macOS Chutney build, but don't let it
  4595. prevent the Travis job from finishing. (The Travis macOS jobs are
  4596. slow, so we don't want to have it delay the whole CI process.)
  4597. Closes ticket 32629.
  4598. o Testing (continuous integration, backport from 0.4.3.1-alpha):
  4599. - Use zstd in our Travis Linux builds. Closes ticket 32242.
  4600. Changes in version 0.4.1.8 - 2020-01-30
  4601. This release backports several bugfixes from later release series,
  4602. including some that had affected the Linux seccomp2 sandbox or Windows
  4603. services. If you're running with one of those configurations, you'll
  4604. probably want to upgrade; otherwise, you should be fine with your
  4605. current version of 0.4.1.x.
  4606. o Major bugfixes (linux seccomp sandbox, backport from 0.4.3.1-alpha):
  4607. - Correct how we use libseccomp. Particularly, stop assuming that
  4608. rules are applied in a particular order or that more rules are
  4609. processed after the first match. Neither is the case! In
  4610. libseccomp <2.4.0 this led to some rules having no effect.
  4611. libseccomp 2.4.0 changed how rules are generated, leading to a
  4612. different ordering, which in turn led to a fatal crash during
  4613. startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
  4614. Peter Gerber.
  4615. - Fix crash when reloading logging configuration while the
  4616. experimental sandbox is enabled. Fixes bug 32841; bugfix on
  4617. 0.4.1.7. Patch by Peter Gerber.
  4618. o Minor bugfixes (crash, backport form 0.4.2.4-rc):
  4619. - When running Tor with an option like --verify-config or
  4620. --dump-config that does not start the event loop, avoid crashing
  4621. if we try to exit early because of an error. Fixes bug 32407;
  4622. bugfix on 0.3.3.1-alpha.
  4623. o Minor bugfixes (windows service, backport from 0.4.3.1-alpha):
  4624. - Initialize the publish/subscribe system when running as a windows
  4625. service. Fixes bug 32778; bugfix on 0.4.1.1-alpha.
  4626. o Testing (backport from 0.4.3.1-alpha):
  4627. - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
  4628. Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
  4629. fix the sandbox errors in 32722. Closes ticket 32240.
  4630. - Re-enable the Travis CI macOS Chutney build, but don't let it
  4631. prevent the Travis job from finishing. (The Travis macOS jobs are
  4632. slow, so we don't want to have it delay the whole CI process.)
  4633. Closes ticket 32629.
  4634. o Testing (continuous integration, backport from 0.4.3.1-alpha):
  4635. - Use zstd in our Travis Linux builds. Closes ticket 32242.
  4636. Changes in version 0.4.3.1-alpha - 2020-01-22
  4637. This is the first alpha release in the 0.4.3.x series. It includes
  4638. improved support for application integration of onion services, support
  4639. for building in a client-only mode, and newly improved internal
  4640. documentation (online at https://src-ref.docs.torproject.org/tor/). It
  4641. also has numerous other small bugfixes and features, as well as
  4642. improvements to our code's internal organization that should help us
  4643. write better code in the future.
  4644. o New system requirements:
  4645. - When building Tor, you now need to have Python 3 in order to run
  4646. the integration tests. (Python 2 is officially unsupported
  4647. upstream, as of 1 Jan 2020.) Closes ticket 32608.
  4648. o Major features (build system):
  4649. - The relay code can now be disabled using the --disable-module-relay
  4650. configure option. When this option is set, we also disable the
  4651. dirauth module. Closes ticket 32123.
  4652. - When Tor is compiled --disable-module-relay, we also omit the code
  4653. used to act as a directory cache. Closes ticket 32487.
  4654. o Major features (directory authority, ed25519):
  4655. - Add support for banning a relay's ed25519 keys in the approved-
  4656. routers file. This will help us migrate away from RSA keys in the
  4657. future. Previously, only RSA keys could be banned in approved-
  4658. routers. Resolves ticket 22029. Patch by Neel Chauhan.
  4659. o Major features (onion service, controller):
  4660. - New control port commands to manage client-side onion service
  4661. authorization credentials. The ONION_CLIENT_AUTH_ADD command adds
  4662. a credential, ONION_CLIENT_AUTH_REMOVE deletes a credential, and
  4663. ONION_CLIENT_AUTH_VIEW lists the credentials. Closes ticket 30381.
  4664. o Major features (onion service, SOCKS5):
  4665. - Introduce a new SocksPort flag, ExtendedErrors, to support more
  4666. detailed error codes in information for applications that support
  4667. them. Closes ticket 30382; implements proposal 304.
  4668. o Major features (proxy):
  4669. - In addition to its current supported proxy types (HTTP CONNECT,
  4670. SOCKS4, and SOCKS5), Tor can now make its OR connections through a
  4671. HAProxy server. A new torrc option was added to specify the
  4672. address/port of the server: TCPProxy <protocol> <host>:<port>.
  4673. Currently the only supported protocol for the option is haproxy.
  4674. Closes ticket 31518. Patch done by Suphanat Chunhapanya (haxxpop).
  4675. o Major bugfixes (linux seccomp sandbox):
  4676. - Correct how we use libseccomp. Particularly, stop assuming that
  4677. rules are applied in a particular order or that more rules are
  4678. processed after the first match. Neither is the case! In
  4679. libseccomp <2.4.0 this led to some rules having no effect.
  4680. libseccomp 2.4.0 changed how rules are generated, leading to a
  4681. different ordering, which in turn led to a fatal crash during
  4682. startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
  4683. Peter Gerber.
  4684. - Fix crash when reloading logging configuration while the
  4685. experimental sandbox is enabled. Fixes bug 32841; bugfix on
  4686. 0.4.1.7. Patch by Peter Gerber.
  4687. o Major bugfixes (networking):
  4688. - Correctly handle IPv6 addresses in SOCKS5 RESOLVE_PTR requests,
  4689. and accept strings as well as binary addresses. Fixes bug 32315;
  4690. bugfix on 0.3.5.1-alpha.
  4691. o Major bugfixes (onion service):
  4692. - Report HS circuit failure back into the HS subsystem so we take
  4693. appropriate action with regards to the client introduction point
  4694. failure cache. This improves reachability of onion services, since
  4695. now clients notice failing introduction circuits properly. Fixes
  4696. bug 32020; bugfix on 0.3.2.1-alpha.
  4697. o Minor feature (configure, build system):
  4698. - Output a list of enabled/disabled features at the end of the
  4699. configure process in a pleasing way. Closes ticket 31373.
  4700. o Minor feature (heartbeat, onion service):
  4701. - Add the DoS INTRODUCE2 defenses counter to the heartbeat DoS
  4702. message. Closes ticket 31371.
  4703. o Minor features (configuration validation):
  4704. - Configuration validation can now be done by per-module callbacks,
  4705. rather than a global validation function. This will let us reduce
  4706. the size of config.c and some of its more cumbersome functions.
  4707. Closes ticket 31241.
  4708. o Minor features (configuration):
  4709. - If a configured hardware crypto accelerator in AccelName is
  4710. prefixed with "!", Tor now exits when it cannot be found. Closes
  4711. ticket 32406.
  4712. - We now use flag-driven logic to warn about obsolete configuration
  4713. fields, so that we can include their names. In 0.4.2, we used a
  4714. special type, which prevented us from generating good warnings.
  4715. Implements ticket 32404.
  4716. o Minor features (controller):
  4717. - Add stream isolation data to STREAM event. Closes ticket 19859.
  4718. - Implement a new GETINFO command to fetch microdescriptor
  4719. consensus. Closes ticket 31684.
  4720. o Minor features (debugging, directory system):
  4721. - Don't crash when we find a non-guard with a guard-fraction value
  4722. set. Instead, log a bug warning, in an attempt to figure out how
  4723. this happened. Diagnostic for ticket 32868.
  4724. o Minor features (defense in depth):
  4725. - Add additional checks around tor_vasprintf() usage, in case the
  4726. function returns an error. Patch by Tobias Stoeckmann. Fixes
  4727. ticket 31147.
  4728. o Minor features (developer tooling):
  4729. - Remove the 0.2.9.x series branches from git scripts (git-merge-
  4730. forward.sh, git-pull-all.sh, git-push-all.sh, git-setup-dirs.sh).
  4731. Closes ticket 32772.
  4732. o Minor features (developer tools):
  4733. - Add a check_cocci_parse.sh script that checks that new code is
  4734. parseable by Coccinelle. Add an exceptions file for unparseable
  4735. files, and run the script from travis CI. Closes ticket 31919.
  4736. - Call the check_cocci_parse.sh script from a 'check-cocci' Makefile
  4737. target. Closes ticket 31919.
  4738. - Add a rename_c_identifiers.py tool to rename a bunch of C
  4739. identifiers at once, and generate a well-formed commit message
  4740. describing the change. This should help with refactoring. Closes
  4741. ticket 32237.
  4742. - Add some scripts in "scripts/coccinelle" to invoke the Coccinelle
  4743. semantic patching tool with the correct flags. These flags are
  4744. fairly easy to forget, and these scripts should help us use
  4745. Coccinelle more effectively in the future. Closes ticket 31705.
  4746. o Minor features (Doxygen):
  4747. - Update Doxygen configuration file to a more recent template (from
  4748. 1.8.15). Closes ticket 32110.
  4749. - "make doxygen" now works with out-of-tree builds. Closes
  4750. ticket 32113.
  4751. - Make sure that doxygen outputs documentation for all of our C
  4752. files. Previously, some were missing @file declarations, causing
  4753. them to be ignored. Closes ticket 32307.
  4754. - Our "make doxygen" target now respects --enable-fatal-warnings by
  4755. default, and does not warn about items that are missing
  4756. documentation. To warn about missing documentation, run configure
  4757. with the "--enable-missing-doc-warnings" flag: doing so suspends
  4758. fatal warnings for doxygen. Closes ticket 32385.
  4759. o Minor features (git scripts):
  4760. - Add TOR_EXTRA_CLONE_ARGS to git-setup-dirs.sh for git clone
  4761. customisation. Closes ticket 32347.
  4762. - Add git-setup-dirs.sh, which sets up an upstream git repository
  4763. and worktrees for tor maintainers. Closes ticket 29603.
  4764. - Add TOR_EXTRA_REMOTE_* to git-setup-dirs.sh for a custom extra
  4765. remote. Closes ticket 32347.
  4766. - Call the check_cocci_parse.sh script from the git commit and push
  4767. hooks. Closes ticket 31919.
  4768. - Make git-push-all.sh skip unchanged branches when pushing to
  4769. upstream. The script already skipped unchanged test branches.
  4770. Closes ticket 32216.
  4771. - Make git-setup-dirs.sh create a master symlink in the worktree
  4772. directory. Closes ticket 32347.
  4773. - Skip unmodified source files when doing some existing git hook
  4774. checks. Related to ticket 31919.
  4775. o Minor features (IPv6, client):
  4776. - Make Tor clients tell dual-stack exits that they prefer IPv6
  4777. connections. This change is equivalent to setting the PreferIPv6
  4778. flag on SOCKSPorts (and most other listener ports). Tor Browser
  4779. has been setting this flag for some time, and we want to remove a
  4780. client distinguisher at exits. Closes ticket 32637.
  4781. o Minor features (portability, android):
  4782. - When building for Android, disable some tests that depend on $HOME
  4783. and/or pwdb, which Android doesn't have. Closes ticket 32825.
  4784. Patch from Hans-Christoph Steiner.
  4785. o Minor features (relay modularity):
  4786. - Split the relay and server pluggable transport config code into
  4787. separate files in the relay module. Disable this code when the
  4788. relay module is disabled. Closes part of ticket 32213.
  4789. - When the relay module is disabled, reject attempts to set the
  4790. ORPort, DirPort, DirCache, BridgeRelay, ExtORPort, or
  4791. ServerTransport* options, rather than ignoring the values of these
  4792. options. Closes part of ticket 32213.
  4793. o Minor features (relay):
  4794. - When the relay module is disabled, change the default config so
  4795. that DirCache is 0, and ClientOnly is 1. Closes ticket 32410.
  4796. o Minor features (release tools):
  4797. - Port our ChangeLog formatting and sorting tools to Python 3.
  4798. Closes ticket 32704.
  4799. o Minor features (testing):
  4800. - Detect some common failure cases for test_parseconf.sh in
  4801. src/test/conf_failures. Closes ticket 32451.
  4802. - Allow test_parseconf.sh to test expected log outputs for successful
  4803. configs, as well as failed configs. Closes ticket 32451.
  4804. - The test_parseconf.sh script now supports result variants for any
  4805. combination of the optional libraries lzma, nss, and zstd. Closes
  4806. ticket 32397.
  4807. o Minor features (tests, Android):
  4808. - When running the unit tests on Android, create temporary files in
  4809. a subdirectory of /data/local/tmp. Closes ticket 32172. Based on a
  4810. patch from Hans-Christoph Steiner.
  4811. o Minor bugfixes (bridges):
  4812. - Lowercase the configured value of BridgeDistribution before adding
  4813. it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
  4814. o Minor bugfixes (build system):
  4815. - Fix "make autostyle" for out-of-tree builds. Fixes bug 32370;
  4816. bugfix on 0.4.1.2-alpha.
  4817. o Minor bugfixes (configuration handling):
  4818. - Make control_event_conf_changed() take in a config_line_t instead
  4819. of a smartlist of alternating key/value entries. Fixes bug 31531;
  4820. bugfix on 0.2.3.3-alpha. Patch by Neel Chauhan.
  4821. o Minor bugfixes (configuration):
  4822. - Check for multiplication overflow when parsing memory units inside
  4823. configuration. Fixes bug 30920; bugfix on 0.0.9rc1.
  4824. - When dumping the configuration, stop adding a trailing space after
  4825. the option name when there is no option value. This issue only
  4826. affects options that accept an empty value or list. (Most options
  4827. reject empty values, or delete the entire line from the dumped
  4828. options.) Fixes bug 32352; bugfix on 0.0.9pre6.
  4829. - Avoid changing the user's value of HardwareAccel as stored by
  4830. SAVECONF, when AccelName is set but HardwareAccel is not. Fixes
  4831. bug 32382; bugfix on 0.2.2.1-alpha.
  4832. - When creating a KeyDirectory with the same location as the
  4833. DataDirectory (not recommended), respect the DataDirectory's
  4834. group-readable setting if one has not been set for the
  4835. KeyDirectory. Fixes bug 27992; bugfix on 0.3.3.1-alpha.
  4836. o Minor bugfixes (controller):
  4837. - In routerstatus_has_changed(), check all the fields that are
  4838. output over the control port. Fixes bug 20218; bugfix
  4839. on 0.1.1.11-alpha
  4840. o Minor bugfixes (correctness checks):
  4841. - Use GCC/Clang's printf-checking feature to make sure that
  4842. tor_assertf() arguments are correctly typed. Fixes bug 32765;
  4843. bugfix on 0.4.1.1-alpha.
  4844. o Minor bugfixes (developer tools):
  4845. - Allow paths starting with ./ in scripts/add_c_file.py. Fixes bug
  4846. 31336; bugfix on 0.4.1.2-alpha.
  4847. o Minor bugfixes (dirauth module):
  4848. - Split the dirauth config code into a separate file in the dirauth
  4849. module. Disable this code when the dirauth module is disabled.
  4850. Closes ticket 32213.
  4851. - When the dirauth module is disabled, reject attempts to set the
  4852. AuthoritativeDir option, rather than ignoring the value of the
  4853. option. Fixes bug 32213; bugfix on 0.3.4.1-alpha.
  4854. o Minor bugfixes (embedded Tor):
  4855. - When starting Tor any time after the first time in a process,
  4856. register the thread in which it is running as the main thread.
  4857. Previously, we only did this on Windows, which could lead to bugs
  4858. like 23081 on non-Windows platforms. Fixes bug 32884; bugfix
  4859. on 0.3.3.1-alpha.
  4860. o Minor bugfixes (git scripts):
  4861. - Avoid sleeping before the last push in git-push-all.sh. Closes
  4862. ticket 32216.
  4863. - Forward all unrecognised arguments in git-push-all.sh to git push.
  4864. Closes ticket 32216.
  4865. o Minor bugfixes (hidden service v3):
  4866. - Do not rely on a "circuit established" flag for intro circuits but
  4867. instead always query the HS circuit map. This is to avoid sync
  4868. issue with that flag and the map. Fixes bug 32094; bugfix
  4869. on 0.3.2.1-alpha.
  4870. o Minor bugfixes (logging, crash):
  4871. - Avoid a possible crash when trying to log a (fatal) assertion
  4872. failure about mismatched magic numbers in configuration objects.
  4873. Fixes bug 32771; bugfix on 0.4.2.1-alpha.
  4874. o Minor bugfixes (onion service v2):
  4875. - When sending the INTRO cell for a v2 Onion Service, look at the
  4876. failure cache alongside timeout values to check if the intro point
  4877. is marked as failed. Previously, we only looked at the relay
  4878. timeout values. Fixes bug 25568; bugfix on 0.2.7.3-rc. Patch by
  4879. Neel Chauhan.
  4880. o Minor bugfixes (onion services v3, client):
  4881. - Properly handle the client rendezvous circuit timeout. Previously
  4882. Tor would sometimes timeout a rendezvous circuit awaiting the
  4883. introduction ACK, and find itself unable to re-establish all
  4884. circuits because the rendezvous circuit timed out too early. Fixes
  4885. bug 32021; bugfix on 0.3.2.1-alpha.
  4886. o Minor bugfixes (onion services):
  4887. - In cancel_descriptor_fetches(), use
  4888. connection_list_by_type_purpose() instead of
  4889. connection_list_by_type_state(). Fixes bug 32639; bugfix on
  4890. 0.3.2.1-alpha. Patch by Neel Chauhan.
  4891. o Minor bugfixes (scripts):
  4892. - Fix update_versions.py for out-of-tree builds. Fixes bug 32371;
  4893. bugfix on 0.4.0.1-alpha.
  4894. o Minor bugfixes (test):
  4895. - Use the same code to find the tor binary in all of our test
  4896. scripts. This change makes sure we are always using the coverage
  4897. binary when coverage is enabled. Fixes bug 32368; bugfix
  4898. on 0.2.7.3-rc.
  4899. o Minor bugfixes (testing):
  4900. - Stop ignoring "tor --dump-config" errors in test_parseconf.sh.
  4901. Fixes bug 32468; bugfix on 0.4.2.1-alpha.
  4902. - When TOR_DISABLE_PRACTRACKER is set, do not apply it to the
  4903. test_practracker.sh script. Doing so caused a test failure. Fixes
  4904. bug 32705; bugfix on 0.4.2.1-alpha.
  4905. - When TOR_DISABLE_PRACTRACKER is set, log a notice to stderr when
  4906. skipping practracker checks. Fixes bug 32705; bugfix
  4907. on 0.4.2.1-alpha.
  4908. o Minor bugfixes (tests):
  4909. - Our option-validation tests no longer depend on specially
  4910. configured non-default, non-passing sets of options. Previously,
  4911. the tests had been written to assume that options would _not_ be
  4912. set to their defaults, which led to needless complexity and
  4913. verbosity. Fixes bug 32175; bugfix on 0.2.8.1-alpha.
  4914. o Minor bugfixes (windows service):
  4915. - Initialize the publish/subscribe system when running as a windows
  4916. service. Fixes bug 32778; bugfix on 0.4.1.1-alpha.
  4917. o Deprecated features:
  4918. - Deprecate the ClientAutoIPv6ORPort option. This option was not
  4919. true "Happy Eyeballs", and often failed on connections that
  4920. weren't reliably dual-stack. Closes ticket 32942. Patch by
  4921. Neel Chauhan.
  4922. o Documentation:
  4923. - Provide a quickstart guide for a Circuit Padding Framework, and
  4924. documentation for researchers to implement and study circuit
  4925. padding machines. Closes ticket 28804.
  4926. - Add documentation in 'HelpfulTools.md' to describe how to build a
  4927. tag file. Closes ticket 32779.
  4928. - Create a high-level description of the long-term software
  4929. architecture goals. Closes ticket 32206.
  4930. - Describe the --dump-config command in the manual page. Closes
  4931. ticket 32467.
  4932. - Unite coding advice from this_not_that.md in torguts repo into our
  4933. coding standards document. Resolves ticket 31853.
  4934. o Removed features:
  4935. - Our Doxygen configuration no longer generates LaTeX output. The
  4936. reference manual produced by doing this was over 4000 pages long,
  4937. and generally unusable. Closes ticket 32099.
  4938. - The option "TestingEstimatedDescriptorPropagationTime" is now
  4939. marked as obsolete. It has had no effect since 0.3.0.7, when
  4940. clients stopped rejecting consensuses "from the future". Closes
  4941. ticket 32807.
  4942. - We no longer support consensus methods before method 28; these
  4943. methods were only used by authorities running versions of Tor that
  4944. are now at end-of-life. In effect, this means that clients,
  4945. relays, and authorities now assume that authorities will be
  4946. running version 0.3.5.x or later. Closes ticket 32695.
  4947. o Testing:
  4948. - Add more test cases for tor's UTF-8 validation function. Also,
  4949. check the arguments passed to the function for consistency. Closes
  4950. ticket 32845.
  4951. - Improve test coverage for relay and dirauth config code, focusing
  4952. on option validation and normalization. Closes ticket 32213.
  4953. - Improve the consistency of test_parseconf.sh output, and run all
  4954. the tests, even if one fails. Closes ticket 32213.
  4955. - Re-enable the Travis CI macOS Chutney build, but don't let it
  4956. prevent the Travis job from finishing. (The Travis macOS jobs are
  4957. slow, so we don't want to have it delay the whole CI process.)
  4958. Closes ticket 32629.
  4959. - Run the practracker unit tests in the pre-commit git hook. Closes
  4960. ticket 32609.
  4961. - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
  4962. Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
  4963. fix the sandbox errors in 32722. Closes ticket 32240.
  4964. o Code simplification and refactoring (channel):
  4965. - Channel layer had a variable length cell handler that was not used
  4966. and thus removed. Closes ticket 32892.
  4967. o Code simplification and refactoring (configuration):
  4968. - Immutability is now implemented as a flag on individual
  4969. configuration options rather than as part of the option-transition
  4970. checking code. Closes ticket 32344.
  4971. - Instead of keeping a list of configuration options to check for
  4972. relative paths, check all the options whose type is "FILENAME".
  4973. Solves part of ticket 32339.
  4974. - Our default log (which ordinarily sends NOTICE-level messages to
  4975. standard output) is now handled in a more logical manner.
  4976. Previously, we replaced the configured log options if they were
  4977. empty. Now, we interpret an empty set of log options as meaning
  4978. "use the default log". Closes ticket 31999.
  4979. - Remove some unused arguments from the options_validate() function,
  4980. to simplify our code and tests. Closes ticket 32187.
  4981. - Simplify the options_validate() code so that it looks at the
  4982. default options directly, rather than taking default options as an
  4983. argument. This change lets us simplify its interface. Closes
  4984. ticket 32185.
  4985. - Use our new configuration architecture to move most authority-
  4986. related options to the directory authority module. Closes
  4987. ticket 32806.
  4988. - When parsing the command line, handle options that determine our
  4989. "quiet level" and our mode of operation (e.g., --dump-config and
  4990. so on) all in one table. Closes ticket 32003.
  4991. o Code simplification and refactoring (controller):
  4992. - Create a new abstraction for formatting control protocol reply
  4993. lines based on key-value pairs. Refactor some existing control
  4994. protocol code to take advantage of this. Closes ticket 30984.
  4995. - Create a helper function that can fetch network status or
  4996. microdesc consensuses. Closes ticket 31684.
  4997. o Code simplification and refactoring (dirauth modularization):
  4998. - Remove the last remaining HAVE_MODULE_DIRAUTH inside a function.
  4999. Closes ticket 32163.
  5000. - Replace some confusing identifiers in process_descs.c. Closes
  5001. ticket 29826.
  5002. - Simplify some relay and dirauth config code. Closes ticket 32213.
  5003. o Code simplification and refactoring (misc):
  5004. - Make all the structs we declare follow the same naming convention
  5005. of ending with "_t". Closes ticket 32415.
  5006. - Move and rename some configuration-related code for clarity.
  5007. Closes ticket 32304.
  5008. - Our include.am files are now broken up by subdirectory.
  5009. Previously, src/core/include.am covered all of the subdirectories
  5010. in "core", "feature", and "app". Closes ticket 32137.
  5011. - Remove underused NS*() macros from test code: they make our tests
  5012. more confusing, especially for code-formatting tools. Closes
  5013. ticket 32887.
  5014. o Code simplification and refactoring (relay modularization):
  5015. - Disable relay_periodic when the relay module is disabled. Closes
  5016. ticket 32244.
  5017. - Disable relay_sys when the relay module is disabled. Closes
  5018. ticket 32245.
  5019. o Code simplification and refactoring (tool support):
  5020. - Add numerous missing dependencies to our include files, so that
  5021. they can be included in different reasonable orders and still
  5022. compile. Addresses part of ticket 32764.
  5023. - Fix some parts of our code that were difficult for Coccinelle to
  5024. parse. Related to ticket 31705.
  5025. - Fix some small issues in our code that prevented automatic
  5026. formatting tools from working. Addresses part of ticket 32764.
  5027. o Documentation (manpage):
  5028. - Alphabetize the Client Options section of the tor manpage. Closes
  5029. ticket 32846.
  5030. - Alphabetize the General Options section of the tor manpage. Closes
  5031. ticket 32708.
  5032. - In the tor(1) manpage, reword and improve formatting of the
  5033. COMMAND-LINE OPTIONS and DESCRIPTION sections. Closes ticket
  5034. 32277. Based on work by Swati Thacker as part of Google Season
  5035. of Docs.
  5036. - In the tor(1) manpage, reword and improve formatting of the FILES,
  5037. SEE ALSO, and BUGS sections. Closes ticket 32176. Based on work by
  5038. Swati Thacker as part of Google Season of Docs.
  5039. o Testing (circuit, EWMA):
  5040. - Add unit tests for circuitmux and EWMA subsystems. Closes
  5041. ticket 32196.
  5042. o Testing (continuous integration):
  5043. - Use zstd in our Travis Linux builds. Closes ticket 32242.
  5044. Changes in version 0.4.2.5 - 2019-12-09
  5045. This is the first stable release in the 0.4.2.x series. This series
  5046. improves reliability and stability, and includes several stability and
  5047. correctness improvements for onion services. It also fixes many smaller
  5048. bugs present in previous series.
  5049. Per our support policy, we will support the 0.4.2.x series for nine
  5050. months, or until three months after the release of a stable 0.4.3.x:
  5051. whichever is longer. If you need longer-term support, please stick
  5052. with 0.3.5.x, which will we plan to support until Feb 2022.
  5053. Per our support policy, we will support the 0.4.2.x series for nine
  5054. months, or until three months after the release of a stable 0.4.3.x:
  5055. whichever is longer. If you need longer-term support, please stick
  5056. with 0.3.5.x, which will we plan to support until Feb 2022.
  5057. Below are the changes since 0.4.1.4-rc. For a complete list of changes
  5058. since 0.4.1.5, see the ReleaseNotes file.
  5059. o Minor features (geoip):
  5060. - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
  5061. Country database. Closes ticket 32685.
  5062. o Testing:
  5063. - Require C99 standards-conforming code in Travis CI, but allow GNU
  5064. gcc extensions. Also activates clang's -Wtypedef-redefinition
  5065. warnings. Build some jobs with -std=gnu99, and some jobs without.
  5066. Closes ticket 32500.
  5067. Changes in version 0.4.1.7 - 2019-12-09
  5068. This release backports several bugfixes to improve stability and
  5069. correctness. Anyone experiencing build problems or crashes with 0.4.1.6,
  5070. including all relays relying on AccountingMax, should upgrade.
  5071. o Major features (directory authorities, backport from 0.4.2.2-alpha):
  5072. - Directory authorities now reject relays running all currently
  5073. deprecated release series. The currently supported release series
  5074. are: 0.2.9, 0.3.5, 0.4.0, 0.4.1, and 0.4.2. Closes ticket 31549.
  5075. o Major bugfixes (embedded Tor, backport from 0.4.2.2-alpha):
  5076. - Avoid a possible crash when restarting Tor in embedded mode and
  5077. enabling a different set of publish/subscribe messages. Fixes bug
  5078. 31898; bugfix on 0.4.1.1-alpha.
  5079. o Major bugfixes (relay, backport from 0.4.2.3-alpha):
  5080. - Relays now respect their AccountingMax bandwidth again. When
  5081. relays entered "soft" hibernation (which typically starts when
  5082. we've hit 90% of our AccountingMax), we had stopped checking
  5083. whether we should enter hard hibernation. Soft hibernation refuses
  5084. new connections and new circuits, but the existing circuits can
  5085. continue, meaning that relays could have exceeded their configured
  5086. AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha.
  5087. o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha):
  5088. - Stop ignoring torrc options after an %include directive, when the
  5089. included directory ends with a file that does not contain any
  5090. config options (but does contain comments or whitespace). Fixes
  5091. bug 31408; bugfix on 0.3.1.1-alpha.
  5092. o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha):
  5093. - Onion services now always use the exact number of intro points
  5094. configured with the HiddenServiceNumIntroductionPoints option (or
  5095. fewer if nodes are excluded). Before, a service could sometimes
  5096. pick more intro points than configured. Fixes bug 31548; bugfix
  5097. on 0.3.2.1-alpha.
  5098. o Minor features (continuous integration, backport from 0.4.2.2-alpha):
  5099. - When building on Appveyor and Travis, pass the "-k" flag to make,
  5100. so that we are informed of all compilation failures, not just the
  5101. first one or two. Closes ticket 31372.
  5102. o Minor features (geoip, backport from 0.4.2.5):
  5103. - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
  5104. Country database. Closes ticket 32685.
  5105. o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha):
  5106. - Avoid spurious errors when Appveyor CI fails before the install step.
  5107. Fixes bug 31884; bugfix on 0.3.4.2-alpha.
  5108. o Minor bugfixes (client, onion service v3, backport from 0.4.2.4-rc):
  5109. - Fix a BUG() assertion that occurs within a very small race window
  5110. between when a client intro circuit opens and when its descriptor
  5111. gets cleaned up from the cache. The circuit is now closed early,
  5112. which will trigger a re-fetch of the descriptor and continue the
  5113. connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
  5114. o Minor bugfixes (connections, backport from 0.4.2.3-rc):
  5115. - Avoid trying to read data from closed connections, which can cause
  5116. needless loops in Libevent and infinite loops in Shadow. Fixes bug
  5117. 30344; bugfix on 0.1.1.1-alpha.
  5118. o Minor bugfixes (error handling, backport from 0.4.2.1-alpha):
  5119. - On abort, try harder to flush the output buffers of log messages.
  5120. On some platforms (macOS), log messages could be discarded when
  5121. the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
  5122. - Report the tor version whenever an assertion fails. Previously, we
  5123. only reported the Tor version on some crashes, and some non-fatal
  5124. assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
  5125. - When tor aborts due to an error, close log file descriptors before
  5126. aborting. Closing the logs makes some OSes flush log file buffers,
  5127. rather than deleting buffered log lines. Fixes bug 31594; bugfix
  5128. on 0.2.5.2-alpha.
  5129. o Minor bugfixes (logging, backport from 0.4.2.2-alpha):
  5130. - Add a missing check for HAVE_PTHREAD_H, because the backtrace code
  5131. uses mutexes. Fixes bug 31614; bugfix on 0.2.5.2-alpha.
  5132. - Disable backtrace signal handlers when shutting down tor. Fixes
  5133. bug 31614; bugfix on 0.2.5.2-alpha.
  5134. - Rate-limit the logging message about the obsolete .exit
  5135. notation. Previously, there was no limit on this warning, which
  5136. could potentially be triggered many times by a hostile website.
  5137. Fixes bug 31466; bugfix on 0.2.2.1-alpha.
  5138. o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha):
  5139. - Do not log a nonfatal assertion failure when receiving a VERSIONS
  5140. cell on a connection using the obsolete v1 link protocol. Log a
  5141. protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
  5142. o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha):
  5143. - Reset the periodic events' "enabled" flag when Tor is shut down
  5144. cleanly. Previously, this flag was left on, which caused periodic
  5145. events not to be re-enabled when Tor was relaunched in-process
  5146. with tor_api.h after a shutdown. Fixes bug 32058; bugfix
  5147. on 0.3.3.1-alpha.
  5148. o Minor bugfixes (multithreading, backport from 0.4.2.2-alpha):
  5149. - Avoid some undefined behaviour when freeing mutexes. Fixes bug
  5150. 31736; bugfix on 0.0.7.
  5151. o Minor bugfixes (process management, backport from 0.4.2.3-alpha):
  5152. - Remove overly strict assertions that triggered when a pluggable
  5153. transport failed to launch. Fixes bug 31091; bugfix
  5154. on 0.4.0.1-alpha.
  5155. - Remove an assertion in the Unix process backend. This assertion
  5156. would trigger when we failed to find the executable for a child
  5157. process. Fixes bug 31810; bugfix on 0.4.0.1-alpha.
  5158. o Minor bugfixes (relay, backport from 0.4.2.2-alpha):
  5159. - Avoid crashing when starting with a corrupt keys directory where
  5160. the old ntor key and the new ntor key are identical. Fixes bug
  5161. 30916; bugfix on 0.2.4.8-alpha.
  5162. o Minor bugfixes (testing, backport from 0.4.2.3-alpha):
  5163. - When testing port rebinding, don't busy-wait for tor to log.
  5164. Instead, actually sleep for a short time before polling again.
  5165. Also improve the formatting of control commands and log messages.
  5166. Fixes bug 31837; bugfix on 0.3.5.1-alpha.
  5167. o Minor bugfixes (tests, SunOS, backport from 0.4.2.2-alpha):
  5168. - Avoid a map_anon_nofork test failure due to a signed/unsigned
  5169. integer comparison. Fixes bug 31897; bugfix on 0.4.1.1-alpha.
  5170. o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha):
  5171. - Log bugs about the TLS read buffer's length only once, rather than
  5172. filling the logs with similar warnings. Fixes bug 31939; bugfix
  5173. on 0.3.0.4-rc.
  5174. o Documentation (backport from 0.4.2.2-alpha):
  5175. - Explain why we can't destroy the backtrace buffer mutex. Explain
  5176. why we don't need to destroy the log mutex. Closes ticket 31736.
  5177. o Testing (continuous integration, backport from 0.4.2.3-alpha):
  5178. - Disable all but one Travis CI macOS build, to mitigate slow
  5179. scheduling of Travis macOS jobs. Closes ticket 32177.
  5180. - Run the chutney IPv6 networks as part of Travis CI. Closes
  5181. ticket 30860.
  5182. - Simplify the Travis CI build matrix, and optimise for build time.
  5183. Closes ticket 31859.
  5184. - Use Windows Server 2019 instead of Windows Server 2016 in our
  5185. Appveyor builds. Closes ticket 32086.
  5186. o Testing (continuous integration, backport from 0.4.2.4-rc):
  5187. - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
  5188. - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
  5189. recent version of coccinelle. But leave chutney on Ubuntu Trusty,
  5190. until we can fix some Bionic permissions issues (see ticket
  5191. 32240). Related to ticket 31919.
  5192. - Install the mingw OpenSSL package in Appveyor. This makes sure
  5193. that the OpenSSL headers and libraries match in Tor's Appveyor
  5194. builds. (This bug was triggered by an Appveyor image update.)
  5195. Fixes bug 32449; bugfix on 0.3.5.6-rc.
  5196. o Testing (continuous integration, backport from 0.4.2.5):
  5197. - Require C99 standards-conforming code in Travis CI, but allow GNU gcc
  5198. extensions. Also activates clang's -Wtypedef-redefinition warnings.
  5199. Build some jobs with -std=gnu99, and some jobs without.
  5200. Closes ticket 32500.
  5201. Changes in version 0.4.0.6 - 2019-12-09
  5202. This is the second stable release in the 0.4.0.x series. This release
  5203. backports several bugfixes to improve stability and correctness. Anyone
  5204. experiencing build problems or crashes with 0.4.0.5, including all relays
  5205. relying on AccountingMax, should upgrade.
  5206. Note that, per our support policy, support for the 0.4.0.x series will end
  5207. on 2 Feb 2020. Anyone still running 0.4.0.x should plan to upgrade to the
  5208. latest stable release, or downgrade to 0.3.5.x, which will get long-term
  5209. support until 1 Feb 2022.
  5210. o Directory authority changes (backport from 0.4.1.5):
  5211. - The directory authority "dizum" has a new IP address. Closes
  5212. ticket 31406.
  5213. o Major bugfixes (bridges, backport from 0.4.1.2-alpha):
  5214. - Consider our directory information to have changed when our list
  5215. of bridges changes. Previously, Tor would not re-compute the
  5216. status of its directory information when bridges changed, and
  5217. therefore would not realize that it was no longer able to build
  5218. circuits. Fixes part of bug 29875.
  5219. - Do not count previously configured working bridges towards our
  5220. total of working bridges. Previously, when Tor's list of bridges
  5221. changed, it would think that the old bridges were still usable,
  5222. and delay fetching router descriptors for the new ones. Fixes part
  5223. of bug 29875; bugfix on 0.3.0.1-alpha.
  5224. o Major bugfixes (circuit build, guard, backport from 0.4.1.4-rc):
  5225. - When considering upgrading circuits from "waiting for guard" to
  5226. "open", always ignore circuits that are marked for close. Otherwise,
  5227. we can end up in the situation where a subsystem is notified that
  5228. a closing circuit has just opened, leading to undesirable
  5229. behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha.
  5230. o Major bugfixes (Onion service reachability, backport from 0.4.1.3-alpha):
  5231. - Properly clean up the introduction point map when circuits change
  5232. purpose from onion service circuits to pathbias, measurement, or
  5233. other circuit types. This should fix some service-side instances
  5234. of introduction point failure. Fixes bug 29034; bugfix
  5235. on 0.3.2.1-alpha.
  5236. o Major bugfixes (onion service v3, backport from 0.4.1.1-alpha):
  5237. - Fix an unreachable bug in which an introduction point could try to
  5238. send an INTRODUCE_ACK with a status code that Trunnel would refuse
  5239. to encode, leading the relay to assert(). We've consolidated the
  5240. ABI values into Trunnel now. Fixes bug 30454; bugfix
  5241. on 0.3.0.1-alpha.
  5242. - Clients can now handle unknown status codes from INTRODUCE_ACK
  5243. cells. (The NACK behavior will stay the same.) This will allow us
  5244. to extend status codes in the future without breaking the normal
  5245. client behavior. Fixes another part of bug 30454; bugfix
  5246. on 0.3.0.1-alpha.
  5247. o Major bugfixes (relay, backport from 0.4.2.3-alpha):
  5248. - Relays now respect their AccountingMax bandwidth again. When
  5249. relays entered "soft" hibernation (which typically starts when
  5250. we've hit 90% of our AccountingMax), we had stopped checking
  5251. whether we should enter hard hibernation. Soft hibernation refuses
  5252. new connections and new circuits, but the existing circuits can
  5253. continue, meaning that relays could have exceeded their configured
  5254. AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha.
  5255. o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha):
  5256. - Stop ignoring torrc options after an %include directive, when the
  5257. included directory ends with a file that does not contain any
  5258. config options (but does contain comments or whitespace). Fixes
  5259. bug 31408; bugfix on 0.3.1.1-alpha.
  5260. o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha):
  5261. - Onion services now always use the exact number of intro points
  5262. configured with the HiddenServiceNumIntroductionPoints option (or
  5263. fewer if nodes are excluded). Before, a service could sometimes
  5264. pick more intro points than configured. Fixes bug 31548; bugfix
  5265. on 0.3.2.1-alpha.
  5266. o Minor features (compile-time modules, backport from version 0.4.1.1-alpha):
  5267. - Add a "--list-modules" command to print a list of which compile-
  5268. time modules are enabled. Closes ticket 30452.
  5269. o Minor features (continuous integration, backport from 0.4.1.1-alpha):
  5270. - Remove sudo configuration lines from .travis.yml as they are no
  5271. longer needed with current Travis build environment. Resolves
  5272. issue 30213.
  5273. o Minor features (continuous integration, backport from 0.4.1.4-rc):
  5274. - Our Travis configuration now uses Chutney to run some network
  5275. integration tests automatically. Closes ticket 29280.
  5276. o Minor features (continuous integration, backport from 0.4.2.2-alpha):
  5277. - When building on Appveyor and Travis, pass the "-k" flag to make,
  5278. so that we are informed of all compilation failures, not just the
  5279. first one or two. Closes ticket 31372.
  5280. o Minor features (fallback directory list, backport from 0.4.1.4-rc):
  5281. - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc
  5282. in December 2018 (of which ~122 were still functional), with a
  5283. list of 148 fallbacks (70 new, 78 existing, 79 removed) generated
  5284. in June 2019. Closes ticket 28795.
  5285. o Minor features (geoip, backport from 0.4.2.5):
  5286. - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
  5287. Country database. Closes ticket 32685.
  5288. o Minor features (stem tests, backport from 0.4.2.1-alpha):
  5289. - Change "make test-stem" so it only runs the stem tests that use
  5290. tor. This change makes test-stem faster and more reliable. Closes
  5291. ticket 31554.
  5292. o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha):
  5293. - Avoid spurious errors when Appveyor CI fails before the install step.
  5294. Fixes bug 31884; bugfix on 0.3.4.2-alpha.
  5295. o Minor bugfixes (build system, backport form 0.4.2.1-alpha):
  5296. - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
  5297. systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
  5298. o Minor bugfixes (circuit isolation, backport from 0.4.1.3-alpha):
  5299. - Fix a logic error that prevented the SessionGroup sub-option from
  5300. being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha.
  5301. o Minor bugfixes (circuit padding, backport from 0.4.1.4-rc):
  5302. - On relays, properly check that a padding machine is absent before
  5303. logging a warning about it being absent. Fixes bug 30649; bugfix
  5304. on 0.4.0.1-alpha.
  5305. o Minor bugfixes (client, onion service v3, backport from 0.4.2.4-rc):
  5306. - Fix a BUG() assertion that occurs within a very small race window
  5307. between when a client intro circuit opens and when its descriptor
  5308. gets cleaned up from the cache. The circuit is now closed early,
  5309. which will trigger a re-fetch of the descriptor and continue the
  5310. connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
  5311. o Minor bugfixes (clock skew detection, backport from 0.4.1.5):
  5312. - Don't believe clock skew results from NETINFO cells that appear to
  5313. arrive before we sent the VERSIONS cells they are responding to.
  5314. Previously, we would accept them up to 3 minutes "in the past".
  5315. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
  5316. o Minor bugfixes (compilation warning, backport from 0.4.1.5):
  5317. - Fix a compilation warning on Windows about casting a function
  5318. pointer for GetTickCount64(). Fixes bug 31374; bugfix
  5319. on 0.2.9.1-alpha.
  5320. o Minor bugfixes (compilation, backport from 0.4.1.5):
  5321. - Avoid using labs() on time_t, which can cause compilation warnings
  5322. on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
  5323. o Minor bugfixes (compilation, backport from 0.4.2.1-alpha):
  5324. - Suppress spurious float-conversion warnings from GCC when calling
  5325. floating-point classifier functions on FreeBSD. Fixes part of bug
  5326. 31687; bugfix on 0.3.1.5-alpha.
  5327. o Minor bugfixes (compilation, unusual configurations, backport from 0.4.1.1-alpha):
  5328. - Avoid failures when building with the ALL_BUGS_ARE_FATAL option
  5329. due to missing declarations of abort(), and prevent other such
  5330. failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha.
  5331. o Minor bugfixes (configuration, proxies, backport from 0.4.1.2-alpha):
  5332. - Fix a bug that prevented us from supporting SOCKS5 proxies that
  5333. want authentication along with configured (but unused!)
  5334. ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha.
  5335. o Minor bugfixes (connections, backport from 0.4.2.3-rc):
  5336. - Avoid trying to read data from closed connections, which can cause
  5337. needless loops in Libevent and infinite loops in Shadow. Fixes bug
  5338. 30344; bugfix on 0.1.1.1-alpha.
  5339. o Minor bugfixes (continuous integration, backport from 0.4.1.3-alpha):
  5340. - Allow the test-stem job to fail in Travis, because it sometimes
  5341. hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha.
  5342. - Skip test_rebind on macOS in Travis, because it is unreliable on
  5343. macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
  5344. - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment
  5345. variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
  5346. o Minor bugfixes (crash on exit, backport from 0.4.1.4-rc):
  5347. - Avoid a set of possible code paths that could try to use freed
  5348. memory in routerlist_free() while Tor was exiting. Fixes bug
  5349. 31003; bugfix on 0.1.2.2-alpha.
  5350. o Minor bugfixes (directory authorities, backport from 0.4.1.3-alpha):
  5351. - Stop crashing after parsing an unknown descriptor purpose
  5352. annotation. We think this bug can only be triggered by modifying a
  5353. local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha.
  5354. o Minor bugfixes (directory authority, backport from 0.4.1.2-alpha):
  5355. - Move the "bandwidth-file-headers" line in directory authority
  5356. votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix
  5357. on 0.3.5.1-alpha.
  5358. o Minor bugfixes (error handling, backport from 0.4.2.1-alpha):
  5359. - On abort, try harder to flush the output buffers of log messages.
  5360. On some platforms (macOS), log messages could be discarded when
  5361. the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
  5362. - Report the tor version whenever an assertion fails. Previously, we
  5363. only reported the Tor version on some crashes, and some non-fatal
  5364. assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
  5365. o Minor bugfixes (FreeBSD, PF-based proxy, IPv6, backport from 0.4.2.1-alpha):
  5366. - When extracting an IPv6 address from a PF-based proxy, verify that
  5367. we are actually configured to receive an IPv6 address, and log an
  5368. internal error if not. Fixes part of bug 31687; bugfix
  5369. on 0.2.3.4-alpha.
  5370. o Minor bugfixes (guards, backport from 0.4.2.1-alpha):
  5371. - When tor is missing descriptors for some primary entry guards,
  5372. make the log message less alarming. It's normal for descriptors to
  5373. expire, as long as tor fetches new ones soon after. Fixes bug
  5374. 31657; bugfix on 0.3.3.1-alpha.
  5375. o Minor bugfixes (logging, backport from 0.4.1.1-alpha):
  5376. - Do not log a warning when running with an OpenSSL version other
  5377. than the one Tor was compiled with, if the two versions should be
  5378. compatible. Previously, we would warn whenever the version was
  5379. different. Fixes bug 30190; bugfix on 0.2.4.2-alpha.
  5380. o Minor bugfixes (logging, backport from 0.4.2.1-alpha):
  5381. - Change log level of message "Hash of session info was not as
  5382. expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
  5383. on 0.1.1.10-alpha.
  5384. o Minor bugfixes (logging, backport from 0.4.2.2-alpha):
  5385. - Rate-limit the logging message about the obsolete .exit
  5386. notation. Previously, there was no limit on this warning, which
  5387. could potentially be triggered many times by a hostile website.
  5388. Fixes bug 31466; bugfix on 0.2.2.1-alpha.
  5389. o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha):
  5390. - Do not log a nonfatal assertion failure when receiving a VERSIONS
  5391. cell on a connection using the obsolete v1 link protocol. Log a
  5392. protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
  5393. o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha):
  5394. - Reset the periodic events' "enabled" flag when Tor is shut down
  5395. cleanly. Previously, this flag was left on, which caused periodic
  5396. events not to be re-enabled when Tor was relaunched in-process
  5397. with tor_api.h after a shutdown. Fixes bug 32058; bugfix
  5398. on 0.3.3.1-alpha.
  5399. o Minor bugfixes (memory leak, backport from 0.4.1.1-alpha):
  5400. - Avoid a minor memory leak that could occur on relays when failing
  5401. to create a "keys" directory. Fixes bug 30148; bugfix
  5402. on 0.3.3.1-alpha.
  5403. o Minor bugfixes (memory leak, backport from 0.4.1.4-rc):
  5404. - Fix a trivial memory leak when parsing an invalid value
  5405. from a download schedule in the configuration. Fixes bug
  5406. 30894; bugfix on 0.3.4.1-alpha.
  5407. o Minor bugfixes (NetBSD, backport from 0.4.1.2-alpha):
  5408. - Fix usage of minherit() on NetBSD and other platforms that define
  5409. MAP_INHERIT_{ZERO,NONE} instead of INHERIT_{ZERO,NONE}. Fixes bug
  5410. 30614; bugfix on 0.4.0.2-alpha. Patch from Taylor Campbell.
  5411. o Minor bugfixes (onion services, backport from 0.4.1.1-alpha):
  5412. - Avoid a GCC 9.1.1 warning (and possible crash depending on libc
  5413. implementation) when failing to load an onion service client
  5414. authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha.
  5415. o Minor bugfixes (out-of-memory handler, backport from 0.4.1.2-alpha):
  5416. - When purging the DNS cache because of an out-of-memory condition,
  5417. try purging just the older entries at first. Previously, we would
  5418. always purge the whole thing. Fixes bug 29617; bugfix
  5419. on 0.3.5.1-alpha.
  5420. o Minor bugfixes (portability, backport from 0.4.1.2-alpha):
  5421. - Avoid crashing in our tor_vasprintf() implementation on systems
  5422. that define neither vasprintf() nor _vscprintf(). (This bug has
  5423. been here long enough that we question whether people are running
  5424. Tor on such systems, but we're applying the fix out of caution.)
  5425. Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by
  5426. Tobias Stoeckmann.
  5427. o Minor bugfixes (process management, backport from 0.4.2.3-alpha):
  5428. - Remove overly strict assertions that triggered when a pluggable
  5429. transport failed to launch. Fixes bug 31091; bugfix
  5430. on 0.4.0.1-alpha.
  5431. - Remove an assertion in the Unix process backend. This assertion
  5432. would trigger when we failed to find the executable for a child
  5433. process. Fixes bug 31810; bugfix on 0.4.0.1-alpha.
  5434. o Minor bugfixes (relay, backport from 0.4.2.2-alpha):
  5435. - Avoid crashing when starting with a corrupt keys directory where
  5436. the old ntor key and the new ntor key are identical. Fixes bug
  5437. 30916; bugfix on 0.2.4.8-alpha.
  5438. o Minor bugfixes (rust, backport from 0.4.2.1-alpha):
  5439. - Correctly exclude a redundant rust build job in Travis. Fixes bug
  5440. 31463; bugfix on 0.3.5.4-alpha.
  5441. o Minor bugfixes (testing, backport from 0.4.2.3-alpha):
  5442. - When testing port rebinding, don't busy-wait for tor to log.
  5443. Instead, actually sleep for a short time before polling again.
  5444. Also improve the formatting of control commands and log messages.
  5445. Fixes bug 31837; bugfix on 0.3.5.1-alpha.
  5446. o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha):
  5447. - Log bugs about the TLS read buffer's length only once, rather than
  5448. filling the logs with similar warnings. Fixes bug 31939; bugfix
  5449. on 0.3.0.4-rc.
  5450. o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha):
  5451. - Always retry v2 single onion service intro and rend circuits with
  5452. a 3-hop path. Previously, v2 single onion services used a 3-hop
  5453. path when rendezvous circuits were retried after a remote or
  5454. delayed failure, but a 1-hop path for immediate retries. Fixes bug
  5455. 23818; bugfix on 0.2.9.3-alpha.
  5456. - Make v3 single onion services fall back to a 3-hop intro, when all
  5457. intro points are unreachable via a 1-hop path. Previously, v3
  5458. single onion services failed when all intro nodes were unreachable
  5459. via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
  5460. o Documentation (backport from 0.4.2.1-alpha):
  5461. - Use RFC 2397 data URL scheme to embed an image into tor-exit-
  5462. notice.html so that operators no longer have to host it
  5463. themselves. Closes ticket 31089.
  5464. o Testing (backport from 0.4.1.2-alpha):
  5465. - Specify torrc paths (with empty files) when launching tor in
  5466. integration tests; refrain from reading user and system torrcs.
  5467. Resolves issue 29702.
  5468. o Testing (continuous integration, backport from 0.4.1.1-alpha):
  5469. - In Travis, show stem's tor log after failure. Closes ticket 30234.
  5470. o Testing (continuous integration, backport from 0.4.1.5):
  5471. - In Travis, make stem log a controller trace to the console, and
  5472. tail stem's tor log after failure. Closes ticket 30591.
  5473. - In Travis, only run the stem tests that use a tor binary. Closes
  5474. ticket 30694.
  5475. o Testing (continuous integration, backport from 0.4.2.3-alpha):
  5476. - Disable all but one Travis CI macOS build, to mitigate slow
  5477. scheduling of Travis macOS jobs. Closes ticket 32177.
  5478. - Run the chutney IPv6 networks as part of Travis CI. Closes
  5479. ticket 30860.
  5480. - Simplify the Travis CI build matrix, and optimise for build time.
  5481. Closes ticket 31859.
  5482. - Use Windows Server 2019 instead of Windows Server 2016 in our
  5483. Appveyor builds. Closes ticket 32086.
  5484. o Testing (continuous integration, backport from 0.4.2.4-rc):
  5485. - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
  5486. recent version of coccinelle. But leave chutney on Ubuntu Trusty,
  5487. until we can fix some Bionic permissions issues (see ticket
  5488. 32240). Related to ticket 31919.
  5489. - Install the mingw OpenSSL package in Appveyor. This makes sure
  5490. that the OpenSSL headers and libraries match in Tor's Appveyor
  5491. builds. (This bug was triggered by an Appveyor image update.)
  5492. Fixes bug 32449; bugfix on 0.3.5.6-rc.
  5493. - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
  5494. o Testing (continuous integration, backport from 0.4.2.5):
  5495. - Require C99 standards-conforming code in Travis CI, but allow GNU gcc
  5496. extensions. Also activates clang's -Wtypedef-redefinition warnings.
  5497. Build some jobs with -std=gnu99, and some jobs without.
  5498. Closes ticket 32500.
  5499. Changes in version 0.3.5.9 - 2019-12-09
  5500. Tor 0.3.5.9 backports serveral fixes from later releases, including
  5501. several that affect bridge users, relay stability, onion services,
  5502. and much more.
  5503. o Directory authority changes (backport from 0.4.1.5):
  5504. - The directory authority "dizum" has a new IP address. Closes
  5505. ticket 31406.
  5506. o Major bugfixes (bridges, backport from 0.4.1.2-alpha):
  5507. - Consider our directory information to have changed when our list
  5508. of bridges changes. Previously, Tor would not re-compute the
  5509. status of its directory information when bridges changed, and
  5510. therefore would not realize that it was no longer able to build
  5511. circuits. Fixes part of bug 29875.
  5512. - Do not count previously configured working bridges towards our
  5513. total of working bridges. Previously, when Tor's list of bridges
  5514. changed, it would think that the old bridges were still usable,
  5515. and delay fetching router descriptors for the new ones. Fixes part
  5516. of bug 29875; bugfix on 0.3.0.1-alpha.
  5517. o Major bugfixes (circuit build, guard, backport from 0.4.1.4-rc):
  5518. - When considering upgrading circuits from "waiting for guard" to
  5519. "open", always ignore circuits that are marked for close. Otherwise,
  5520. we can end up in the situation where a subsystem is notified that
  5521. a closing circuit has just opened, leading to undesirable
  5522. behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha.
  5523. o Major bugfixes (NSS, relay, backport from 0.4.0.4-rc):
  5524. - When running with NSS, disable TLS 1.2 ciphersuites that use
  5525. SHA384 for their PRF. Due to an NSS bug, the TLS key exporters for
  5526. these ciphersuites don't work -- which caused relays to fail to
  5527. handshake with one another when these ciphersuites were enabled.
  5528. Fixes bug 29241; bugfix on 0.3.5.1-alpha.
  5529. o Major bugfixes (Onion service reachability, backport from 0.4.1.3-alpha):
  5530. - Properly clean up the introduction point map when circuits change
  5531. purpose from onion service circuits to pathbias, measurement, or
  5532. other circuit types. This should fix some service-side instances
  5533. of introduction point failure. Fixes bug 29034; bugfix
  5534. on 0.3.2.1-alpha.
  5535. o Major bugfixes (onion service v3, backport from 0.4.1.1-alpha):
  5536. - Fix an unreachable bug in which an introduction point could try to
  5537. send an INTRODUCE_ACK with a status code that Trunnel would refuse
  5538. to encode, leading the relay to assert(). We've consolidated the
  5539. ABI values into Trunnel now. Fixes bug 30454; bugfix
  5540. on 0.3.0.1-alpha.
  5541. - Clients can now handle unknown status codes from INTRODUCE_ACK
  5542. cells. (The NACK behavior will stay the same.) This will allow us
  5543. to extend status codes in the future without breaking the normal
  5544. client behavior. Fixes another part of bug 30454; bugfix
  5545. on 0.3.0.1-alpha.
  5546. o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha):
  5547. - Stop ignoring torrc options after an %include directive, when the
  5548. included directory ends with a file that does not contain any
  5549. config options (but does contain comments or whitespace). Fixes
  5550. bug 31408; bugfix on 0.3.1.1-alpha.
  5551. o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha):
  5552. - Onion services now always use the exact number of intro points
  5553. configured with the HiddenServiceNumIntroductionPoints option (or
  5554. fewer if nodes are excluded). Before, a service could sometimes
  5555. pick more intro points than configured. Fixes bug 31548; bugfix
  5556. on 0.3.2.1-alpha.
  5557. o Minor features (address selection, backport from 0.4.0.3-alpha):
  5558. - Treat the subnet 100.64.0.0/10 as public for some purposes;
  5559. private for others. This subnet is the RFC 6598 (Carrier Grade
  5560. NAT) IP range, and is deployed by many ISPs as an alternative to
  5561. RFC 1918 that does not break existing internal networks. Tor now
  5562. blocks SOCKS and control ports on these addresses and warns users
  5563. if client ports or ExtORPorts are listening on a RFC 6598 address.
  5564. Closes ticket 28525. Patch by Neel Chauhan.
  5565. o Minor features (bandwidth authority, backport from 0.4.0.4-rc):
  5566. - Make bandwidth authorities ignore relays that are reported in the
  5567. bandwidth file with the flag "vote=0". This change allows us to
  5568. report unmeasured relays for diagnostic reasons without including
  5569. their bandwidth in the bandwidth authorities' vote. Closes
  5570. ticket 29806.
  5571. o Minor features (compile-time modules, backport from version 0.4.1.1-alpha):
  5572. - Add a "--list-modules" command to print a list of which compile-
  5573. time modules are enabled. Closes ticket 30452.
  5574. o Minor features (continuous integration, backport from 0.4.0.4-rc):
  5575. - On Travis Rust builds, cleanup Rust registry and refrain from
  5576. caching the "target/" directory to speed up builds. Resolves
  5577. issue 29962.
  5578. o Minor features (continuous integration, backport from 0.4.0.5):
  5579. - In Travis, tell timelimit to use stem's backtrace signals, and
  5580. launch python directly from timelimit, so python receives the
  5581. signals from timelimit, rather than make. Closes ticket 30117.
  5582. o Minor features (continuous integration, backport from 0.4.1.1-alpha):
  5583. - Remove sudo configuration lines from .travis.yml as they are no
  5584. longer needed with current Travis build environment. Resolves
  5585. issue 30213.
  5586. o Minor features (continuous integration, backport from 0.4.1.4-rc):
  5587. - Our Travis configuration now uses Chutney to run some network
  5588. integration tests automatically. Closes ticket 29280.
  5589. o Minor features (continuous integration, backport from 0.4.2.2-alpha):
  5590. - When building on Appveyor and Travis, pass the "-k" flag to make,
  5591. so that we are informed of all compilation failures, not just the
  5592. first one or two. Closes ticket 31372.
  5593. o Minor features (fallback directory list, backport from 0.4.1.4-rc):
  5594. - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc
  5595. in December 2018 (of which ~122 were still functional), with a
  5596. list of 148 fallbacks (70 new, 78 existing, 79 removed) generated
  5597. in June 2019. Closes ticket 28795.
  5598. o Minor features (geoip, backport from 0.4.2.5):
  5599. - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
  5600. Country database. Closes ticket 32685.
  5601. o Minor features (NSS, diagnostic, backport from 0.4.0.4-rc):
  5602. - Try to log an error from NSS (if there is any) and a more useful
  5603. description of our situation if we are using NSS and a call to
  5604. SSL_ExportKeyingMaterial() fails. Diagnostic for ticket 29241.
  5605. o Minor features (stem tests, backport from 0.4.2.1-alpha):
  5606. - Change "make test-stem" so it only runs the stem tests that use
  5607. tor. This change makes test-stem faster and more reliable. Closes
  5608. ticket 31554.
  5609. o Minor bugfixes (security, backport from 0.4.0.4-rc):
  5610. - Verify in more places that we are not about to create a buffer
  5611. with more than INT_MAX bytes, to avoid possible OOB access in the
  5612. event of bugs. Fixes bug 30041; bugfix on 0.2.0.16. Found and
  5613. fixed by Tobias Stoeckmann.
  5614. - Fix a potential double free bug when reading huge bandwidth files.
  5615. The issue is not exploitable in the current Tor network because
  5616. the vulnerable code is only reached when directory authorities
  5617. read bandwidth files, but bandwidth files come from a trusted
  5618. source (usually the authorities themselves). Furthermore, the
  5619. issue is only exploitable in rare (non-POSIX) 32-bit architectures,
  5620. which are not used by any of the current authorities. Fixes bug
  5621. 30040; bugfix on 0.3.5.1-alpha. Bug found and fixed by
  5622. Tobias Stoeckmann.
  5623. o Minor bugfix (continuous integration, backport from 0.4.0.4-rc):
  5624. - Reset coverage state on disk after Travis CI has finished. This
  5625. should prevent future coverage merge errors from causing the test
  5626. suite for the "process" subsystem to fail. The process subsystem
  5627. was introduced in 0.4.0.1-alpha. Fixes bug 29036; bugfix
  5628. on 0.2.9.15.
  5629. - Terminate test-stem if it takes more than 9.5 minutes to run.
  5630. (Travis terminates the job after 10 minutes of no output.)
  5631. Diagnostic for 29437. Fixes bug 30011; bugfix on 0.3.5.4-alpha.
  5632. o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha):
  5633. - Avoid spurious errors when Appveyor CI fails before the install step.
  5634. Fixes bug 31884; bugfix on 0.3.4.2-alpha.
  5635. o Minor bugfixes (build system, backport form 0.4.2.1-alpha):
  5636. - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
  5637. systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
  5638. o Minor bugfixes (C correctness, backport from 0.4.0.4-rc):
  5639. - Fix an unlikely memory leak in consensus_diff_apply(). Fixes bug
  5640. 29824; bugfix on 0.3.1.1-alpha. This is Coverity warning
  5641. CID 1444119.
  5642. o Minor bugfixes (circuit isolation, backport from 0.4.1.3-alpha):
  5643. - Fix a logic error that prevented the SessionGroup sub-option from
  5644. being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha.
  5645. o Minor bugfixes (client, onion service v3, backport from 0.4.2.4-rc):
  5646. - Fix a BUG() assertion that occurs within a very small race window
  5647. between when a client intro circuit opens and when its descriptor
  5648. gets cleaned up from the cache. The circuit is now closed early,
  5649. which will trigger a re-fetch of the descriptor and continue the
  5650. connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
  5651. o Minor bugfixes (clock skew detection, backport from 0.4.1.5):
  5652. - Don't believe clock skew results from NETINFO cells that appear to
  5653. arrive before we sent the VERSIONS cells they are responding to.
  5654. Previously, we would accept them up to 3 minutes "in the past".
  5655. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
  5656. o Minor bugfixes (compilation warning, backport from 0.4.1.5):
  5657. - Fix a compilation warning on Windows about casting a function
  5658. pointer for GetTickCount64(). Fixes bug 31374; bugfix
  5659. on 0.2.9.1-alpha.
  5660. o Minor bugfixes (compilation, backport from 0.4.0.2-alpha):
  5661. - Silence a compiler warning in test-memwipe.c on OpenBSD. Fixes bug
  5662. 29145; bugfix on 0.2.9.3-alpha. Patch from Kris Katterjohn.
  5663. o Minor bugfixes (compilation, backport from 0.4.1.5):
  5664. - Avoid using labs() on time_t, which can cause compilation warnings
  5665. on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
  5666. o Minor bugfixes (compilation, backport from 0.4.2.1-alpha):
  5667. - Suppress spurious float-conversion warnings from GCC when calling
  5668. floating-point classifier functions on FreeBSD. Fixes part of bug
  5669. 31687; bugfix on 0.3.1.5-alpha.
  5670. o Minor bugfixes (compilation, unusual configurations, backport from 0.4.1.1-alpha):
  5671. - Avoid failures when building with the ALL_BUGS_ARE_FATAL option
  5672. due to missing declarations of abort(), and prevent other such
  5673. failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha.
  5674. o Minor bugfixes (configuration, proxies, backport from 0.4.1.2-alpha):
  5675. - Fix a bug that prevented us from supporting SOCKS5 proxies that
  5676. want authentication along with configured (but unused!)
  5677. ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha.
  5678. o Minor bugfixes (connections, backport from 0.4.2.3-rc):
  5679. - Avoid trying to read data from closed connections, which can cause
  5680. needless loops in Libevent and infinite loops in Shadow. Fixes bug
  5681. 30344; bugfix on 0.1.1.1-alpha.
  5682. o Minor bugfixes (continuous integration, backport from 0.4.1.3-alpha):
  5683. - Allow the test-stem job to fail in Travis, because it sometimes
  5684. hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha.
  5685. - Skip test_rebind on macOS in Travis, because it is unreliable on
  5686. macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
  5687. - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment
  5688. variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
  5689. o Minor bugfixes (crash on exit, backport from 0.4.1.4-rc):
  5690. - Avoid a set of possible code paths that could try to use freed
  5691. memory in routerlist_free() while Tor was exiting. Fixes bug
  5692. 31003; bugfix on 0.1.2.2-alpha.
  5693. o Minor bugfixes (directory authorities, backport from 0.4.1.3-alpha):
  5694. - Stop crashing after parsing an unknown descriptor purpose
  5695. annotation. We think this bug can only be triggered by modifying a
  5696. local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha.
  5697. o Minor bugfixes (directory authority, backport from 0.4.1.2-alpha):
  5698. - Move the "bandwidth-file-headers" line in directory authority
  5699. votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix
  5700. on 0.3.5.1-alpha.
  5701. o Minor bugfixes (error handling, backport from 0.4.2.1-alpha):
  5702. - On abort, try harder to flush the output buffers of log messages.
  5703. On some platforms (macOS), log messages could be discarded when
  5704. the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
  5705. - Report the tor version whenever an assertion fails. Previously, we
  5706. only reported the Tor version on some crashes, and some non-fatal
  5707. assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
  5708. o Minor bugfixes (FreeBSD, PF-based proxy, IPv6, backport from 0.4.2.1-alpha):
  5709. - When extracting an IPv6 address from a PF-based proxy, verify that
  5710. we are actually configured to receive an IPv6 address, and log an
  5711. internal error if not. Fixes part of bug 31687; bugfix
  5712. on 0.2.3.4-alpha.
  5713. o Minor bugfixes (guards, backport from 0.4.2.1-alpha):
  5714. - When tor is missing descriptors for some primary entry guards,
  5715. make the log message less alarming. It's normal for descriptors to
  5716. expire, as long as tor fetches new ones soon after. Fixes bug
  5717. 31657; bugfix on 0.3.3.1-alpha.
  5718. o Minor bugfixes (logging, backport from 0.4.0.2-alpha):
  5719. - Avoid logging that we are relaxing a circuit timeout when that
  5720. timeout is fixed. Fixes bug 28698; bugfix on 0.2.4.7-alpha.
  5721. o Minor bugfixes (logging, backport from 0.4.0.3-alpha):
  5722. - Correct a misleading error message when IPv4Only or IPv6Only is
  5723. used but the resolved address can not be interpreted as an address
  5724. of the specified IP version. Fixes bug 13221; bugfix on
  5725. 0.2.3.9-alpha. Patch from Kris Katterjohn.
  5726. - Log the correct port number for listening sockets when "auto" is
  5727. used to let Tor pick the port number. Previously, port 0 was
  5728. logged instead of the actual port number. Fixes bug 29144; bugfix
  5729. on 0.3.5.1-alpha. Patch from Kris Katterjohn.
  5730. - Stop logging a BUG() warning when Tor is waiting for exit
  5731. descriptors. Fixes bug 28656; bugfix on 0.3.5.1-alpha.
  5732. o Minor bugfixes (logging, backport from 0.4.1.1-alpha):
  5733. - Do not log a warning when running with an OpenSSL version other
  5734. than the one Tor was compiled with, if the two versions should be
  5735. compatible. Previously, we would warn whenever the version was
  5736. different. Fixes bug 30190; bugfix on 0.2.4.2-alpha.
  5737. o Minor bugfixes (logging, backport from 0.4.2.1-alpha):
  5738. - Change log level of message "Hash of session info was not as
  5739. expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
  5740. on 0.1.1.10-alpha.
  5741. o Minor bugfixes (logging, backport from 0.4.2.2-alpha):
  5742. - Rate-limit the logging message about the obsolete .exit
  5743. notation. Previously, there was no limit on this warning, which
  5744. could potentially be triggered many times by a hostile website.
  5745. Fixes bug 31466; bugfix on 0.2.2.1-alpha.
  5746. o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha):
  5747. - Do not log a nonfatal assertion failure when receiving a VERSIONS
  5748. cell on a connection using the obsolete v1 link protocol. Log a
  5749. protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
  5750. o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha):
  5751. - Reset the periodic events' "enabled" flag when Tor is shut down
  5752. cleanly. Previously, this flag was left on, which caused periodic
  5753. events not to be re-enabled when Tor was relaunched in-process
  5754. with tor_api.h after a shutdown. Fixes bug 32058; bugfix
  5755. on 0.3.3.1-alpha.
  5756. o Minor bugfixes (memory leak, backport from 0.4.1.1-alpha):
  5757. - Avoid a minor memory leak that could occur on relays when failing
  5758. to create a "keys" directory. Fixes bug 30148; bugfix
  5759. on 0.3.3.1-alpha.
  5760. o Minor bugfixes (memory leak, backport from 0.4.1.4-rc):
  5761. - Fix a trivial memory leak when parsing an invalid value
  5762. from a download schedule in the configuration. Fixes bug
  5763. 30894; bugfix on 0.3.4.1-alpha.
  5764. o Minor bugfixes (memory management, backport from 0.4.0.3-alpha):
  5765. - Refactor the shared random state's memory management so that it
  5766. actually takes ownership of the shared random value pointers.
  5767. Fixes bug 29706; bugfix on 0.2.9.1-alpha.
  5768. o Minor bugfixes (memory management, testing, backport from 0.4.0.3-alpha):
  5769. - Stop leaking parts of the shared random state in the shared-random
  5770. unit tests. Fixes bug 29599; bugfix on 0.2.9.1-alpha.
  5771. o Minor bugfixes (onion services, backport from 0.4.1.1-alpha):
  5772. - Avoid a GCC 9.1.1 warning (and possible crash depending on libc
  5773. implementation) when failing to load an onion service client
  5774. authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha.
  5775. o Minor bugfixes (out-of-memory handler, backport from 0.4.1.2-alpha):
  5776. - When purging the DNS cache because of an out-of-memory condition,
  5777. try purging just the older entries at first. Previously, we would
  5778. always purge the whole thing. Fixes bug 29617; bugfix
  5779. on 0.3.5.1-alpha.
  5780. o Minor bugfixes (portability, backport from 0.4.1.2-alpha):
  5781. - Avoid crashing in our tor_vasprintf() implementation on systems
  5782. that define neither vasprintf() nor _vscprintf(). (This bug has
  5783. been here long enough that we question whether people are running
  5784. Tor on such systems, but we're applying the fix out of caution.)
  5785. Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by
  5786. Tobias Stoeckmann.
  5787. o Minor bugfixes (relay, backport from 0.4.2.2-alpha):
  5788. - Avoid crashing when starting with a corrupt keys directory where
  5789. the old ntor key and the new ntor key are identical. Fixes bug
  5790. 30916; bugfix on 0.2.4.8-alpha.
  5791. o Minor bugfixes (rust, backport from 0.4.0.5):
  5792. - Abort on panic in all build profiles, instead of potentially
  5793. unwinding into C code. Fixes bug 27199; bugfix on 0.3.3.1-alpha.
  5794. o Minor bugfixes (rust, backport from 0.4.2.1-alpha):
  5795. - Correctly exclude a redundant rust build job in Travis. Fixes bug
  5796. 31463; bugfix on 0.3.5.4-alpha.
  5797. o Minor bugfixes (single onion services, backport from 0.4.0.3-alpha):
  5798. - Allow connections to single onion services to remain idle without
  5799. being disconnected. Previously, relays acting as rendezvous points
  5800. for single onion services were mistakenly closing idle rendezvous
  5801. circuits after 60 seconds, thinking that they were unused
  5802. directory-fetching circuits that had served their purpose. Fixes
  5803. bug 29665; bugfix on 0.2.1.26.
  5804. o Minor bugfixes (stats, backport from 0.4.0.3-alpha):
  5805. - When ExtraInfoStatistics is 0, stop including PaddingStatistics in
  5806. relay and bridge extra-info documents. Fixes bug 29017; bugfix
  5807. on 0.3.1.1-alpha.
  5808. o Minor bugfixes (testing, backport from 0.4.0.3-alpha):
  5809. - Downgrade some LOG_ERR messages in the address/* tests to
  5810. warnings. The LOG_ERR messages were occurring when we had no
  5811. configured network. We were failing the unit tests, because we
  5812. backported 28668 to 0.3.5.8, but did not backport 29530. Fixes bug
  5813. 29530; bugfix on 0.3.5.8.
  5814. - Fix our gcov wrapper script to look for object files at the
  5815. correct locations. Fixes bug 29435; bugfix on 0.3.5.1-alpha.
  5816. o Minor bugfixes (testing, backport from 0.4.0.4-rc):
  5817. - Backport the 0.3.4 src/test/test-network.sh to 0.2.9. We need a
  5818. recent test-network.sh to use new chutney features in CI. Fixes
  5819. bug 29703; bugfix on 0.2.9.1-alpha.
  5820. - Fix a test failure on Windows caused by an unexpected "BUG"
  5821. warning in our tests for tor_gmtime_r(-1). Fixes bug 29922; bugfix
  5822. on 0.2.9.3-alpha.
  5823. o Minor bugfixes (testing, backport from 0.4.2.3-alpha):
  5824. - When testing port rebinding, don't busy-wait for tor to log.
  5825. Instead, actually sleep for a short time before polling again.
  5826. Also improve the formatting of control commands and log messages.
  5827. Fixes bug 31837; bugfix on 0.3.5.1-alpha.
  5828. o Minor bugfixes (TLS protocol, backport form 0.4.0.4-rc):
  5829. - When classifying a client's selection of TLS ciphers, if the
  5830. client ciphers are not yet available, do not cache the result.
  5831. Previously, we had cached the unavailability of the cipher list
  5832. and never looked again, which in turn led us to assume that the
  5833. client only supported the ancient V1 link protocol. This, in turn,
  5834. was causing Stem integration tests to stall in some cases. Fixes
  5835. bug 30021; bugfix on 0.2.4.8-alpha.
  5836. o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha):
  5837. - Log bugs about the TLS read buffer's length only once, rather than
  5838. filling the logs with similar warnings. Fixes bug 31939; bugfix
  5839. on 0.3.0.4-rc.
  5840. o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha):
  5841. - Always retry v2 single onion service intro and rend circuits with
  5842. a 3-hop path. Previously, v2 single onion services used a 3-hop
  5843. path when rendezvous circuits were retried after a remote or
  5844. delayed failure, but a 1-hop path for immediate retries. Fixes bug
  5845. 23818; bugfix on 0.2.9.3-alpha.
  5846. - Make v3 single onion services fall back to a 3-hop intro, when all
  5847. intro points are unreachable via a 1-hop path. Previously, v3
  5848. single onion services failed when all intro nodes were unreachable
  5849. via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
  5850. o Minor bugfixes (Windows, CI, backport from 0.4.0.3-alpha):
  5851. - Skip the Appveyor 32-bit Windows Server 2016 job, and 64-bit
  5852. Windows Server 2012 R2 job. The remaining 2 jobs still provide
  5853. coverage of 64/32-bit, and Windows Server 2016/2012 R2. Also set
  5854. fast_finish, so failed jobs terminate the build immediately. Fixes
  5855. bug 29601; bugfix on 0.3.5.4-alpha.
  5856. o Documentation (backport from 0.4.2.1-alpha):
  5857. - Use RFC 2397 data URL scheme to embed an image into tor-exit-
  5858. notice.html so that operators no longer have to host it
  5859. themselves. Closes ticket 31089.
  5860. o Testing (backport from 0.4.1.2-alpha):
  5861. - Specify torrc paths (with empty files) when launching tor in
  5862. integration tests; refrain from reading user and system torrcs.
  5863. Resolves issue 29702.
  5864. o Testing (continuous integration, backport from 0.4.1.1-alpha):
  5865. - In Travis, show stem's tor log after failure. Closes ticket 30234.
  5866. o Testing (continuous integration, backport from 0.4.1.5):
  5867. - In Travis, make stem log a controller trace to the console, and
  5868. tail stem's tor log after failure. Closes ticket 30591.
  5869. - In Travis, only run the stem tests that use a tor binary. Closes
  5870. ticket 30694.
  5871. o Testing (continuous integration, backport from 0.4.2.3-alpha):
  5872. - Disable all but one Travis CI macOS build, to mitigate slow
  5873. scheduling of Travis macOS jobs. Closes ticket 32177.
  5874. - Run the chutney IPv6 networks as part of Travis CI. Closes
  5875. ticket 30860.
  5876. - Simplify the Travis CI build matrix, and optimise for build time.
  5877. Closes ticket 31859.
  5878. - Use Windows Server 2019 instead of Windows Server 2016 in our
  5879. Appveyor builds. Closes ticket 32086.
  5880. o Testing (continuous integration, backport from 0.4.2.4-rc):
  5881. - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
  5882. recent version of coccinelle. But leave chutney on Ubuntu Trusty,
  5883. until we can fix some Bionic permissions issues (see ticket
  5884. 32240). Related to ticket 31919.
  5885. - Install the mingw OpenSSL package in Appveyor. This makes sure
  5886. that the OpenSSL headers and libraries match in Tor's Appveyor
  5887. builds. (This bug was triggered by an Appveyor image update.)
  5888. Fixes bug 32449; bugfix on 0.3.5.6-rc.
  5889. - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
  5890. o Testing (continuous integration, backport from 0.4.2.5):
  5891. - Require C99 standards-conforming code in Travis CI, but allow GNU gcc
  5892. extensions. Also activates clang's -Wtypedef-redefinition warnings.
  5893. Build some jobs with -std=gnu99, and some jobs without.
  5894. Closes ticket 32500.
  5895. Changes in version 0.4.2.4-rc - 2019-11-15
  5896. Tor 0.4.2.4-rc is the first release candidate in its series. It fixes
  5897. several bugs from earlier versions, including a few that would result in
  5898. stack traces or incorrect behavior.
  5899. o Minor features (build system):
  5900. - Make pkg-config use --prefix when cross-compiling, if
  5901. PKG_CONFIG_PATH is not set. Closes ticket 32191.
  5902. o Minor features (geoip):
  5903. - Update geoip and geoip6 to the November 6 2019 Maxmind GeoLite2
  5904. Country database. Closes ticket 32440.
  5905. o Minor bugfixes (client, onion service v3):
  5906. - Fix a BUG() assertion that occurs within a very small race window
  5907. between when a client intro circuit opens and when its descriptor
  5908. gets cleaned up from the cache. The circuit is now closed early,
  5909. which will trigger a re-fetch of the descriptor and continue the
  5910. connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
  5911. o Minor bugfixes (code quality):
  5912. - Fix "make check-includes" so it runs correctly on out-of-tree
  5913. builds. Fixes bug 31335; bugfix on 0.3.5.1-alpha.
  5914. o Minor bugfixes (configuration):
  5915. - Log the option name when skipping an obsolete option. Fixes bug
  5916. 32295; bugfix on 0.4.2.1-alpha.
  5917. o Minor bugfixes (crash):
  5918. - When running Tor with an option like --verify-config or
  5919. --dump-config that does not start the event loop, avoid crashing
  5920. if we try to exit early because of an error. Fixes bug 32407;
  5921. bugfix on 0.3.3.1-alpha.
  5922. o Minor bugfixes (directory):
  5923. - When checking if a directory connection is anonymous, test if the
  5924. circuit was marked for close before looking at its channel. This
  5925. avoids a BUG() stacktrace if the circuit was previously closed.
  5926. Fixes bug 31958; bugfix on 0.4.2.1-alpha.
  5927. o Minor bugfixes (shellcheck):
  5928. - Fix minor shellcheck errors in the git-*.sh scripts. Fixes bug
  5929. 32402; bugfix on 0.4.2.1-alpha.
  5930. - Start checking most scripts for shellcheck errors again. Fixes bug
  5931. 32402; bugfix on 0.4.2.1-alpha.
  5932. o Testing (continuous integration):
  5933. - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
  5934. recent version of coccinelle. But leave chutney on Ubuntu Trusty,
  5935. until we can fix some Bionic permissions issues (see ticket
  5936. 32240). Related to ticket 31919.
  5937. - Install the mingw OpenSSL package in Appveyor. This makes sure
  5938. that the OpenSSL headers and libraries match in Tor's Appveyor
  5939. builds. (This bug was triggered by an Appveyor image update.)
  5940. Fixes bug 32449; bugfix on 0.3.5.6-rc.
  5941. - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
  5942. Changes in version 0.4.2.3-alpha - 2019-10-24
  5943. This release fixes several bugs from the previous alpha release, and
  5944. from earlier versions of Tor.
  5945. o Major bugfixes (relay):
  5946. - Relays now respect their AccountingMax bandwidth again. When
  5947. relays entered "soft" hibernation (which typically starts when
  5948. we've hit 90% of our AccountingMax), we had stopped checking
  5949. whether we should enter hard hibernation. Soft hibernation refuses
  5950. new connections and new circuits, but the existing circuits can
  5951. continue, meaning that relays could have exceeded their configured
  5952. AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha.
  5953. o Major bugfixes (v3 onion services):
  5954. - Onion services now always use the exact number of intro points
  5955. configured with the HiddenServiceNumIntroductionPoints option (or
  5956. fewer if nodes are excluded). Before, a service could sometimes
  5957. pick more intro points than configured. Fixes bug 31548; bugfix
  5958. on 0.3.2.1-alpha.
  5959. o Minor feature (onion services, control port):
  5960. - The ADD_ONION command's keyword "BEST" now defaults to ED25519-V3
  5961. (v3) onion services. Previously it defaulted to RSA1024 (v2).
  5962. Closes ticket 29669.
  5963. o Minor features (testing):
  5964. - When running tests that attempt to look up hostnames, replace the
  5965. libc name lookup functions with ones that do not actually touch
  5966. the network. This way, the tests complete more quickly in the
  5967. presence of a slow or missing DNS resolver. Closes ticket 31841.
  5968. o Minor features (testing, continuous integration):
  5969. - Disable all but one Travis CI macOS build, to mitigate slow
  5970. scheduling of Travis macOS jobs. Closes ticket 32177.
  5971. - Run the chutney IPv6 networks as part of Travis CI. Closes
  5972. ticket 30860.
  5973. - Simplify the Travis CI build matrix, and optimise for build time.
  5974. Closes ticket 31859.
  5975. - Use Windows Server 2019 instead of Windows Server 2016 in our
  5976. Appveyor builds. Closes ticket 32086.
  5977. o Minor bugfixes (build system):
  5978. - Interpret "--disable-module-dirauth=no" correctly. Fixes bug
  5979. 32124; bugfix on 0.3.4.1-alpha.
  5980. - Interpret "--with-tcmalloc=no" correctly. Fixes bug 32124; bugfix
  5981. on 0.2.0.20-rc.
  5982. - Stop failing when jemalloc is requested, but tcmalloc is not
  5983. found. Fixes bug 32124; bugfix on 0.3.5.1-alpha.
  5984. - When pkg-config is not installed, or a library that depends on
  5985. pkg-config is not found, tell the user what to do to fix the
  5986. problem. Fixes bug 31922; bugfix on 0.3.1.1-alpha.
  5987. o Minor bugfixes (connections):
  5988. - Avoid trying to read data from closed connections, which can cause
  5989. needless loops in Libevent and infinite loops in Shadow. Fixes bug
  5990. 30344; bugfix on 0.1.1.1-alpha.
  5991. o Minor bugfixes (error handling):
  5992. - Always lock the backtrace buffer before it is used. Fixes bug
  5993. 31734; bugfix on 0.2.5.3-alpha.
  5994. o Minor bugfixes (mainloop, periodic events, in-process API):
  5995. - Reset the periodic events' "enabled" flag when Tor is shut down
  5996. cleanly. Previously, this flag was left on, which caused periodic
  5997. events not to be re-enabled when Tor was relaunched in-process
  5998. with tor_api.h after a shutdown. Fixes bug 32058; bugfix
  5999. on 0.3.3.1-alpha.
  6000. o Minor bugfixes (process management):
  6001. - Remove overly strict assertions that triggered when a pluggable
  6002. transport failed to launch. Fixes bug 31091; bugfix
  6003. on 0.4.0.1-alpha.
  6004. - Remove an assertion in the Unix process backend. This assertion
  6005. would trigger when we failed to find the executable for a child
  6006. process. Fixes bug 31810; bugfix on 0.4.0.1-alpha.
  6007. o Minor bugfixes (testing):
  6008. - Avoid intermittent test failures due to a test that had relied on
  6009. inconsistent timing sources. Fixes bug 31995; bugfix
  6010. on 0.3.1.3-alpha.
  6011. - When testing port rebinding, don't busy-wait for tor to log.
  6012. Instead, actually sleep for a short time before polling again.
  6013. Also improve the formatting of control commands and log messages.
  6014. Fixes bug 31837; bugfix on 0.3.5.1-alpha.
  6015. o Minor bugfixes (tls, logging):
  6016. - Log bugs about the TLS read buffer's length only once, rather than
  6017. filling the logs with similar warnings. Fixes bug 31939; bugfix
  6018. on 0.3.0.4-rc.
  6019. o Minor bugfixes (v3 onion services):
  6020. - Fix an implicit conversion from ssize_t to size_t discovered by
  6021. Coverity. Fixes bug 31682; bugfix on 0.4.2.1-alpha.
  6022. - Fix a memory leak in an unlikely error code path when encoding HS
  6023. DoS establish intro extension cell. Fixes bug 32063; bugfix
  6024. on 0.4.2.1-alpha.
  6025. - When cleaning up intro circuits for a v3 onion service, don't
  6026. remove circuits that have an established or pending circuit, even
  6027. if they ran out of retries. This way, we don't remove a circuit on
  6028. its last retry. Fixes bug 31652; bugfix on 0.3.2.1-alpha.
  6029. o Documentation:
  6030. - Correct the description of "GuardLifetime". Fixes bug 31189;
  6031. bugfix on 0.3.0.1-alpha.
  6032. - Make clear in the man page, in both the bandwidth section and the
  6033. AccountingMax section, that Tor counts in powers of two, not
  6034. powers of ten: 1 GByte is 1024*1024*1024 bytes, not one billion
  6035. bytes. Resolves ticket 32106.
  6036. Changes in version 0.4.2.2-alpha - 2019-10-07
  6037. This release fixes several bugs from the previous alpha release, and
  6038. from earlier versions. It also includes a change in authorities, so
  6039. that they begin to reject the currently unsupported release series.
  6040. o Major features (directory authorities):
  6041. - Directory authorities now reject relays running all currently
  6042. deprecated release series. The currently supported release series
  6043. are: 0.2.9, 0.3.5, 0.4.0, 0.4.1, and 0.4.2. Closes ticket 31549.
  6044. o Major bugfixes (embedded Tor):
  6045. - Avoid a possible crash when restarting Tor in embedded mode and
  6046. enabling a different set of publish/subscribe messages. Fixes bug
  6047. 31898; bugfix on 0.4.1.1-alpha.
  6048. o Major bugfixes (torrc parsing):
  6049. - Stop ignoring torrc options after an %include directive, when the
  6050. included directory ends with a file that does not contain any
  6051. config options (but does contain comments or whitespace). Fixes
  6052. bug 31408; bugfix on 0.3.1.1-alpha.
  6053. o Minor features (auto-formatting scripts):
  6054. - When annotating C macros, never generate a line that our check-
  6055. spaces script would reject. Closes ticket 31759.
  6056. - When annotating C macros, try to remove cases of double-negation.
  6057. Closes ticket 31779.
  6058. o Minor features (continuous integration):
  6059. - When building on Appveyor and Travis, pass the "-k" flag to make,
  6060. so that we are informed of all compilation failures, not just the
  6061. first one or two. Closes ticket 31372.
  6062. o Minor features (geoip):
  6063. - Update geoip and geoip6 to the October 1 2019 Maxmind GeoLite2
  6064. Country database. Closes ticket 31931.
  6065. o Minor features (maintenance scripts):
  6066. - Add a Coccinelle script to detect bugs caused by incrementing or
  6067. decrementing a variable inside a call to log_debug(). Since
  6068. log_debug() is a macro whose arguments are conditionally
  6069. evaluated, it is usually an error to do this. One such bug was
  6070. 30628, in which SENDME cells were miscounted by a decrement
  6071. operator inside a log_debug() call. Closes ticket 30743.
  6072. o Minor features (onion services v3):
  6073. - Assist users who try to setup v2 client authorization in v3 onion
  6074. services by pointing them to the right documentation. Closes
  6075. ticket 28966.
  6076. o Minor bugfixes (Appveyor continuous integration):
  6077. - Avoid spurious errors when Appveyor CI fails before the install
  6078. step. Fixes bug 31884; bugfix on 0.3.4.2-alpha.
  6079. o Minor bugfixes (best practices tracker):
  6080. - When listing overbroad exceptions, do not also list problems, and
  6081. do not list insufficiently broad exceptions. Fixes bug 31338;
  6082. bugfix on 0.4.2.1-alpha.
  6083. o Minor bugfixes (controller protocol):
  6084. - Fix the MAPADDRESS controller command to accept one or more
  6085. arguments. Previously, it required two or more arguments, and
  6086. ignored the first. Fixes bug 31772; bugfix on 0.4.1.1-alpha.
  6087. o Minor bugfixes (logging):
  6088. - Add a missing check for HAVE_PTHREAD_H, because the backtrace code
  6089. uses mutexes. Fixes bug 31614; bugfix on 0.2.5.2-alpha.
  6090. - Disable backtrace signal handlers when shutting down tor. Fixes
  6091. bug 31614; bugfix on 0.2.5.2-alpha.
  6092. - Rate-limit the logging message about the obsolete .exit
  6093. notation. Previously, there was no limit on this warning, which
  6094. could potentially be triggered many times by a hostile website.
  6095. Fixes bug 31466; bugfix on 0.2.2.1-alpha.
  6096. - When initialising log domain masks, only set known log domains.
  6097. Fixes bug 31854; bugfix on 0.2.1.1-alpha.
  6098. o Minor bugfixes (logging, protocol violations):
  6099. - Do not log a nonfatal assertion failure when receiving a VERSIONS
  6100. cell on a connection using the obsolete v1 link protocol. Log a
  6101. protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
  6102. o Minor bugfixes (modules):
  6103. - Explain what the optional Directory Authority module is, and what
  6104. happens when it is disabled. Fixes bug 31825; bugfix
  6105. on 0.3.4.1-alpha.
  6106. o Minor bugfixes (multithreading):
  6107. - Avoid some undefined behaviour when freeing mutexes. Fixes bug
  6108. 31736; bugfix on 0.0.7.
  6109. o Minor bugfixes (relay):
  6110. - Avoid crashing when starting with a corrupt keys directory where
  6111. the old ntor key and the new ntor key are identical. Fixes bug
  6112. 30916; bugfix on 0.2.4.8-alpha.
  6113. o Minor bugfixes (tests, SunOS):
  6114. - Avoid a map_anon_nofork test failure due to a signed/unsigned
  6115. integer comparison. Fixes bug 31897; bugfix on 0.4.1.1-alpha.
  6116. o Code simplification and refactoring:
  6117. - Refactor connection_control_process_inbuf() to reduce the size of
  6118. a practracker exception. Closes ticket 31840.
  6119. - Refactor the microdescs_parse_from_string() function into smaller
  6120. pieces, for better comprehensibility. Closes ticket 31675.
  6121. - Use SEVERITY_MASK_IDX() to find the LOG_* mask indexes in the unit
  6122. tests and fuzzers, rather than using hard-coded values. Closes
  6123. ticket 31334.
  6124. - Interface for function `decrypt_desc_layer` cleaned up. Closes
  6125. ticket 31589.
  6126. o Documentation:
  6127. - Document the signal-safe logging behaviour in the tor man page.
  6128. Also add some comments to the relevant functions. Closes
  6129. ticket 31839.
  6130. - Explain why we can't destroy the backtrace buffer mutex. Explain
  6131. why we don't need to destroy the log mutex. Closes ticket 31736.
  6132. - The Tor source code repository now includes a (somewhat dated)
  6133. description of Tor's modular architecture, in doc/HACKING/design.
  6134. This is based on the old "tor-guts.git" repository, which we are
  6135. adopting and superseding. Closes ticket 31849.
  6136. Changes in version 0.4.1.6 - 2019-09-19
  6137. This release backports several bugfixes to improve stability and
  6138. correctness. Anyone experiencing build problems or crashes with 0.4.1.5,
  6139. or experiencing reliability issues with single onion services, should
  6140. upgrade.
  6141. o Major bugfixes (crash, Linux, Android, backport from 0.4.2.1-alpha):
  6142. - Tolerate systems (including some Android installations) where
  6143. madvise and MADV_DONTDUMP are available at build-time, but not at
  6144. run time. Previously, these systems would notice a failed syscall
  6145. and abort. Fixes bug 31570; bugfix on 0.4.1.1-alpha.
  6146. - Tolerate systems (including some Linux installations) where
  6147. madvise and/or MADV_DONTFORK are available at build-time, but not
  6148. at run time. Previously, these systems would notice a failed
  6149. syscall and abort. Fixes bug 31696; bugfix on 0.4.1.1-alpha.
  6150. o Minor features (stem tests, backport from 0.4.2.1-alpha):
  6151. - Change "make test-stem" so it only runs the stem tests that use
  6152. tor. This change makes test-stem faster and more reliable. Closes
  6153. ticket 31554.
  6154. o Minor bugfixes (build system, backport form 0.4.2.1-alpha):
  6155. - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
  6156. systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
  6157. o Minor bugfixes (compilation, backport from 0.4.2.1-alpha):
  6158. - Add more stub functions to fix compilation on Android with link-
  6159. time optimization when --disable-module-dirauth is used.
  6160. Previously, these compilation settings would make the compiler
  6161. look for functions that didn't exist. Fixes bug 31552; bugfix
  6162. on 0.4.1.1-alpha.
  6163. - Suppress spurious float-conversion warnings from GCC when calling
  6164. floating-point classifier functions on FreeBSD. Fixes part of bug
  6165. 31687; bugfix on 0.3.1.5-alpha.
  6166. o Minor bugfixes (controller protocol):
  6167. - Fix the MAPADDRESS controller command to accept one or more
  6168. arguments. Previously, it required two or more arguments, and ignored
  6169. the first. Fixes bug 31772; bugfix on 0.4.1.1-alpha.
  6170. o Minor bugfixes (FreeBSD, PF-based proxy, IPv6, backport from 0.4.2.1-alpha):
  6171. - When extracting an IPv6 address from a PF-based proxy, verify that
  6172. we are actually configured to receive an IPv6 address, and log an
  6173. internal error if not. Fixes part of bug 31687; bugfix
  6174. on 0.2.3.4-alpha.
  6175. o Minor bugfixes (guards, backport from 0.4.2.1-alpha):
  6176. - When tor is missing descriptors for some primary entry guards,
  6177. make the log message less alarming. It's normal for descriptors to
  6178. expire, as long as tor fetches new ones soon after. Fixes bug
  6179. 31657; bugfix on 0.3.3.1-alpha.
  6180. o Minor bugfixes (logging, backport from 0.4.2.1-alpha):
  6181. - Change log level of message "Hash of session info was not as
  6182. expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
  6183. on 0.1.1.10-alpha.
  6184. o Minor bugfixes (rust, backport from 0.4.2.1-alpha):
  6185. - Correctly exclude a redundant rust build job in Travis. Fixes bug
  6186. 31463; bugfix on 0.3.5.4-alpha.
  6187. o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha):
  6188. - Always retry v2 single onion service intro and rend circuits with
  6189. a 3-hop path. Previously, v2 single onion services used a 3-hop
  6190. path when rendezvous circuits were retried after a remote or
  6191. delayed failure, but a 1-hop path for immediate retries. Fixes bug
  6192. 23818; bugfix on 0.2.9.3-alpha.
  6193. o Minor bugfixes (v3 single onion services, backport from 0.4.2.1-alpha):
  6194. - Always retry v3 single onion service intro and rend circuits with
  6195. a 3-hop path. Previously, v3 single onion services used a 3-hop
  6196. path when rend circuits were retried after a remote or delayed
  6197. failure, but a 1-hop path for immediate retries. Fixes bug 23818;
  6198. bugfix on 0.3.2.1-alpha.
  6199. - Make v3 single onion services fall back to a 3-hop intro, when all
  6200. intro points are unreachable via a 1-hop path. Previously, v3
  6201. single onion services failed when all intro nodes were unreachable
  6202. via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
  6203. o Documentation (backport from 0.4.2.1-alpha):
  6204. - Use RFC 2397 data URL scheme to embed an image into tor-exit-
  6205. notice.html so that operators no longer have to host it
  6206. themselves. Closes ticket 31089.
  6207. Changes in version 0.4.2.1-alpha - 2019-09-17
  6208. This is the first alpha release in the 0.4.2.x series. It adds new
  6209. defenses for denial-of-service attacks against onion services. It also
  6210. includes numerous kinds of bugfixes and refactoring to help improve
  6211. Tor's stability and ease of development.
  6212. o Major features (onion service v3, denial of service):
  6213. - Add onion service introduction denial of service defenses. Intro
  6214. points can now rate-limit client introduction requests, using
  6215. parameters that can be sent by the service within the
  6216. ESTABLISH_INTRO cell. If the cell extension for this is not used,
  6217. the intro point will honor the consensus parameters. Closes
  6218. ticket 30924.
  6219. o Major bugfixes (circuit build, guard):
  6220. - When considering upgrading circuits from "waiting for guard" to
  6221. "open", always ignore circuits that are marked for close.
  6222. Previously we could end up in the situation where a subsystem is
  6223. notified of a circuit opening, but the circuit is still marked for
  6224. close, leading to undesirable behavior. Fixes bug 30871; bugfix
  6225. on 0.3.0.1-alpha.
  6226. o Major bugfixes (crash, Linux, Android):
  6227. - Tolerate systems (including some Android installations) where
  6228. madvise and MADV_DONTDUMP are available at build-time, but not at
  6229. run time. Previously, these systems would notice a failed syscall
  6230. and abort. Fixes bug 31570; bugfix on 0.4.1.1-alpha.
  6231. - Tolerate systems (including some Linux installations) where
  6232. madvise and/or MADV_DONTFORK are available at build-time, but not
  6233. at run time. Previously, these systems would notice a failed
  6234. syscall and abort. Fixes bug 31696; bugfix on 0.4.1.1-alpha.
  6235. o Minor features (best practices tracker):
  6236. - Our best-practices tracker now integrates with our include-checker
  6237. tool to keep track of how many layering violations we have not yet
  6238. fixed. We hope to reduce this number over time to improve Tor's
  6239. modularity. Closes ticket 31176.
  6240. - Add a TOR_PRACTRACKER_OPTIONS variable for passing arguments to
  6241. practracker from the environment. We may want this for continuous
  6242. integration. Closes ticket 31309.
  6243. - Give a warning rather than an error when a practracker exception
  6244. is violated by a small amount, add a --list-overbroad option to
  6245. practracker that lists exceptions that are stricter than they need
  6246. to be, and provide an environment variable for disabling
  6247. practracker. Closes ticket 30752.
  6248. - Our best-practices tracker now looks at headers as well as C
  6249. files. Closes ticket 31175.
  6250. o Minor features (build system):
  6251. - Add --disable-manpage and --disable-html-manual options to
  6252. configure script. This will enable shortening build times by not
  6253. building documentation. Resolves issue 19381.
  6254. o Minor features (compilation):
  6255. - Log a more useful error message when we are compiling and one of
  6256. the compile-time hardening options we have selected can be linked
  6257. but not executed. Closes ticket 27530.
  6258. o Minor features (configuration):
  6259. - The configuration code has been extended to allow splitting
  6260. configuration data across multiple objects. Previously, all
  6261. configuration data needed to be kept in a single object, which
  6262. tended to become bloated. Closes ticket 31240.
  6263. o Minor features (continuous integration):
  6264. - When running CI builds on Travis, put some random data in
  6265. ~/.torrc, to make sure no tests are reading the Tor configuration
  6266. file from its default location. Resolves issue 30102.
  6267. o Minor features (debugging):
  6268. - Log a nonfatal assertion failure if we encounter a configuration
  6269. line whose command is "CLEAR" but which has a nonempty value. This
  6270. should be impossible, according to the rules of our configuration
  6271. line parsing. Closes ticket 31529.
  6272. o Minor features (git hooks):
  6273. - Our pre-commit git hook now checks for a special file before
  6274. running practracker, so that practracker only runs on branches
  6275. that are based on master. Since the pre-push hook calls the pre-
  6276. commit hook, practracker will also only run before pushes of
  6277. branches based on master. Closes ticket 30979.
  6278. o Minor features (git scripts):
  6279. - Add a "--" command-line argument, to separate git-push-all.sh
  6280. script arguments from arguments that are passed through to git
  6281. push. Closes ticket 31314.
  6282. - Add a -r <remote-name> argument to git-push-all.sh, so the script
  6283. can push test branches to a personal remote. Closes ticket 31314.
  6284. - Add a -t <test-branch-prefix> argument to git-merge-forward.sh and
  6285. git-push-all.sh, which makes these scripts create, merge forward,
  6286. and push test branches. Closes ticket 31314.
  6287. - Add a -u argument to git-merge-forward.sh, so that the script can
  6288. re-use existing test branches after a merge failure and fix.
  6289. Closes ticket 31314.
  6290. - Add a TOR_GIT_PUSH env var, which sets the default git push
  6291. command and arguments for git-push-all.sh. Closes ticket 31314.
  6292. - Add a TOR_PUSH_DELAY variable to git-push-all.sh, which makes the
  6293. script push master and maint branches with a delay between each
  6294. branch. These delays trigger the CI jobs in a set order, which
  6295. should show the most likely failures first. Also make pushes
  6296. atomic by default, and make the script pass any command-line
  6297. arguments to git push. Closes ticket 29879.
  6298. - Call the shellcheck script from the pre-commit hook. Closes
  6299. ticket 30967.
  6300. - Skip pushing test branches that are the same as a remote
  6301. maint/release/master branch in git-push-all.sh by default. Add a
  6302. -s argument, so git-push-all.sh can push all test branches. Closes
  6303. ticket 31314.
  6304. o Minor features (IPv6, logging):
  6305. - Log IPv6 addresses as well as IPv4 addresses when describing
  6306. routerinfos, routerstatuses, and nodes. Closes ticket 21003.
  6307. o Minor features (onion service v3):
  6308. - Do not allow single hop clients to fetch or post an HS descriptor
  6309. from an HSDir. Closes ticket 24964.
  6310. o Minor features (onion service):
  6311. - Disallow single-hop clients at the introduction point. We've
  6312. removed Tor2web support a while back and single-hop rendezvous
  6313. attempts are blocked at the relays. This change should remove load
  6314. off the network from spammy clients. Close ticket 24963.
  6315. o Minor features (stem tests):
  6316. - Change "make test-stem" so it only runs the stem tests that use
  6317. tor. This change makes test-stem faster and more reliable. Closes
  6318. ticket 31554.
  6319. o Minor features (testing):
  6320. - Add a script to invoke "tor --dump-config" and "tor
  6321. --verify-config" with various configuration options, and see
  6322. whether tor's resulting configuration or error messages are what
  6323. we expect. Use it for integration testing of our +Option and
  6324. /Option flags. Closes ticket 31637.
  6325. - Improve test coverage for our existing configuration parsing and
  6326. management API. Closes ticket 30893.
  6327. - Add integration tests to make sure that practracker gives the
  6328. outputs we expect. Closes ticket 31477.
  6329. - The practracker self-tests are now run as part of the Tor test
  6330. suite. Closes ticket 31304.
  6331. o Minor features (token bucket):
  6332. - Implement a generic token bucket that uses a single counter, for
  6333. use in anti-DoS onion service work. Closes ticket 30687.
  6334. o Minor bugfixes (best practices tracker):
  6335. - Fix a few issues in the best-practices script, including tests,
  6336. tab tolerance, error reporting, and directory-exclusion logic.
  6337. Fixes bug 29746; bugfix on 0.4.1.1-alpha.
  6338. - When running check-best-practices, only consider files in the src
  6339. subdirectory. Previously we had recursively considered all
  6340. subdirectories, which made us get confused by the temporary
  6341. directories made by "make distcheck". Fixes bug 31578; bugfix
  6342. on 0.4.1.1-alpha.
  6343. o Minor bugfixes (build system):
  6344. - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
  6345. systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
  6346. o Minor bugfixes (chutney, makefiles, documentation):
  6347. - "make test-network-all" now shows the warnings from each test-
  6348. network.sh run on the console, so developers see new warnings
  6349. early. We've also improved the documentation for this feature, and
  6350. renamed a Makefile variable so the code is self-documenting. Fixes
  6351. bug 30455; bugfix on 0.3.0.4-rc.
  6352. o Minor bugfixes (compilation):
  6353. - Add more stub functions to fix compilation on Android with link-
  6354. time optimization when --disable-module-dirauth is used.
  6355. Previously, these compilation settings would make the compiler
  6356. look for functions that didn't exist. Fixes bug 31552; bugfix
  6357. on 0.4.1.1-alpha.
  6358. - Suppress spurious float-conversion warnings from GCC when calling
  6359. floating-point classifier functions on FreeBSD. Fixes part of bug
  6360. 31687; bugfix on 0.3.1.5-alpha.
  6361. o Minor bugfixes (configuration):
  6362. - Invalid floating-point values in the configuration file are now
  6363. treated as errors in the configuration. Previously, they were
  6364. ignored and treated as zero. Fixes bug 31475; bugfix on 0.0.1.
  6365. o Minor bugfixes (coverity):
  6366. - Add an assertion when parsing a BEGIN cell so that coverity can be
  6367. sure that we are not about to dereference a NULL address. Fixes
  6368. bug 31026; bugfix on 0.2.4.7-alpha. This is CID 1447296.
  6369. - In our siphash implementation, when building for coverity, use
  6370. memcpy in place of a switch statement, so that coverity can tell
  6371. we are not accessing out-of-bounds memory. Fixes bug 31025; bugfix
  6372. on 0.2.8.1-alpha. This is tracked as CID 1447293 and 1447295.
  6373. - Fix several coverity warnings from our unit tests. Fixes bug
  6374. 31030; bugfix on 0.2.4.1-alpha, 0.3.2.1-alpha, and 0.4.0.1-alpha.
  6375. o Minor bugfixes (developer tooling):
  6376. - Only log git script changes in the post-merge script when the
  6377. merge was to the master branch. Fixes bug 31040; bugfix
  6378. on 0.4.1.1-alpha.
  6379. o Minor bugfixes (directory authorities):
  6380. - Return a distinct status when formatting annotations fails. Fixes
  6381. bug 30780; bugfix on 0.2.0.8-alpha.
  6382. o Minor bugfixes (error handling):
  6383. - On abort, try harder to flush the output buffers of log messages.
  6384. On some platforms (macOS), log messages could be discarded when
  6385. the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
  6386. - Report the tor version whenever an assertion fails. Previously, we
  6387. only reported the Tor version on some crashes, and some non-fatal
  6388. assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
  6389. - When tor aborts due to an error, close log file descriptors before
  6390. aborting. Closing the logs makes some OSes flush log file buffers,
  6391. rather than deleting buffered log lines. Fixes bug 31594; bugfix
  6392. on 0.2.5.2-alpha.
  6393. o Minor bugfixes (FreeBSD, PF-based proxy, IPv6):
  6394. - When extracting an IPv6 address from a PF-based proxy, verify that
  6395. we are actually configured to receive an IPv6 address, and log an
  6396. internal error if not. Fixes part of bug 31687; bugfix
  6397. on 0.2.3.4-alpha.
  6398. o Minor bugfixes (git hooks):
  6399. - Remove a duplicate call to practracker from the pre-push hook. The
  6400. pre-push hook already calls the pre-commit hook, which calls
  6401. practracker. Fixes bug 31462; bugfix on 0.4.1.1-alpha.
  6402. o Minor bugfixes (git scripts):
  6403. - Stop hard-coding the bash path in the git scripts. Some OSes don't
  6404. have bash in /usr/bin, others have an ancient bash at this path.
  6405. Fixes bug 30840; bugfix on 0.4.0.1-alpha.
  6406. - Stop hard-coding the tor master branch name and worktree path in
  6407. the git scripts. Fixes bug 30841; bugfix on 0.4.0.1-alpha.
  6408. - Allow git-push-all.sh to be run from any directory. Previously,
  6409. the script only worked if run from an upstream worktree directory.
  6410. Closes ticket 31678.
  6411. o Minor bugfixes (guards):
  6412. - When tor is missing descriptors for some primary entry guards,
  6413. make the log message less alarming. It's normal for descriptors to
  6414. expire, as long as tor fetches new ones soon after. Fixes bug
  6415. 31657; bugfix on 0.3.3.1-alpha.
  6416. o Minor bugfixes (ipv6):
  6417. - Check for private IPv6 addresses alongside their IPv4 equivalents
  6418. when authorities check descriptors. Previously, we only checked
  6419. for private IPv4 addresses. Fixes bug 31088; bugfix on
  6420. 0.2.3.21-rc. Patch by Neel Chauhan.
  6421. - When parsing microdescriptors, we should check the IPv6 exit
  6422. policy alongside IPv4. Previously, we checked both exit policies
  6423. for only router info structures, while microdescriptors were
  6424. IPv4-only. Fixes bug 27284; bugfix on 0.2.3.1-alpha. Patch by
  6425. Neel Chauhan.
  6426. o Minor bugfixes (logging):
  6427. - Change log level of message "Hash of session info was not as
  6428. expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
  6429. on 0.1.1.10-alpha.
  6430. - Fix a code issue that would have broken our parsing of log domains
  6431. as soon as we had 33 of them. Fortunately, we still only have 29.
  6432. Fixes bug 31451; bugfix on 0.4.1.4-rc.
  6433. o Minor bugfixes (memory management):
  6434. - Stop leaking a small amount of memory in nt_service_install(), in
  6435. unreachable code. Fixes bug 30799; bugfix on 0.2.0.7-alpha. Patch
  6436. by Xiaoyin Liu.
  6437. o Minor bugfixes (networking, IP addresses):
  6438. - When parsing addresses via Tor's internal DNS lookup API, reject
  6439. IPv4 addresses in square brackets, and accept IPv6 addresses in
  6440. square brackets. This change completes the work started in 23082,
  6441. making address parsing consistent between tor's internal DNS
  6442. lookup and address parsing APIs. Fixes bug 30721; bugfix
  6443. on 0.2.1.5-alpha.
  6444. - When parsing addresses via Tor's internal address:port parsing and
  6445. DNS lookup APIs, require IPv6 addresses with ports to have square
  6446. brackets. But allow IPv6 addresses without ports, whether or not
  6447. they have square brackets. Fixes bug 30721; bugfix
  6448. on 0.2.1.5-alpha.
  6449. o Minor bugfixes (onion service v3):
  6450. - When purging the client descriptor cache, close any introduction
  6451. point circuits associated with purged cache entries. This avoids
  6452. picking those circuits later when connecting to the same
  6453. introduction points. Fixes bug 30921; bugfix on 0.3.2.1-alpha.
  6454. o Minor bugfixes (onion services):
  6455. - In the hs_ident_circuit_t data structure, remove the unused field
  6456. circuit_type and the respective argument in hs_ident_circuit_new().
  6457. This field was set by clients (for introduction) and services (for
  6458. introduction and rendezvous) but was never used afterwards. Fixes
  6459. bug 31490; bugfix on 0.3.2.1-alpha. Patch by Neel Chauhan.
  6460. o Minor bugfixes (operator tools):
  6461. - Make tor-print-ed-signing-cert(1) print certificate expiration
  6462. date in RFC 1123 and UNIX timestamp formats, to make output
  6463. machine readable. Fixes bug 31012; bugfix on 0.3.5.1-alpha.
  6464. o Minor bugfixes (rust):
  6465. - Correctly exclude a redundant rust build job in Travis. Fixes bug
  6466. 31463; bugfix on 0.3.5.4-alpha.
  6467. - Raise the minimum rustc version to 1.31.0, as checked by configure
  6468. and CI. Fixes bug 31442; bugfix on 0.3.5.4-alpha.
  6469. o Minor bugfixes (sendme, code structure):
  6470. - Rename the trunnel SENDME file definition from sendme.trunnel to
  6471. sendme_cell.trunnel to avoid having twice sendme.{c|h} in the
  6472. repository. Fixes bug 30769; bugfix on 0.4.1.1-alpha.
  6473. o Minor bugfixes (statistics):
  6474. - Stop removing the ed25519 signature if the extra info file is too
  6475. big. If the signature data was removed, but the keyword was kept,
  6476. this could result in an unparseable extra info file. Fixes bug
  6477. 30958; bugfix on 0.2.7.2-alpha.
  6478. o Minor bugfixes (subsystems):
  6479. - Make the subsystem init order match the subsystem module
  6480. dependencies. Call windows process security APIs as early as
  6481. possible. Initialize logging before network and time, so that
  6482. network and time can use logging. Fixes bug 31615; bugfix
  6483. on 0.4.0.1-alpha.
  6484. o Minor bugfixes (testing):
  6485. - Teach the util/socketpair_ersatz test to work correctly when we
  6486. have no network stack configured. Fixes bug 30804; bugfix
  6487. on 0.2.5.1-alpha.
  6488. o Minor bugfixes (v2 single onion services):
  6489. - Always retry v2 single onion service intro and rend circuits with
  6490. a 3-hop path. Previously, v2 single onion services used a 3-hop
  6491. path when rendezvous circuits were retried after a remote or
  6492. delayed failure, but a 1-hop path for immediate retries. Fixes bug
  6493. 23818; bugfix on 0.2.9.3-alpha.
  6494. o Minor bugfixes (v3 single onion services):
  6495. - Always retry v3 single onion service intro and rend circuits with
  6496. a 3-hop path. Previously, v3 single onion services used a 3-hop
  6497. path when rend circuits were retried after a remote or delayed
  6498. failure, but a 1-hop path for immediate retries. Fixes bug 23818;
  6499. bugfix on 0.3.2.1-alpha.
  6500. - Make v3 single onion services fall back to a 3-hop intro, when all
  6501. intro points are unreachable via a 1-hop path. Previously, v3
  6502. single onion services failed when all intro nodes were unreachable
  6503. via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
  6504. o Documentation:
  6505. - Improve documentation in circuit padding subsystem. Patch by
  6506. Tobias Pulls. Closes ticket 31113.
  6507. - Include an example usage for IPv6 ORPort in our sample torrc.
  6508. Closes ticket 31320; patch from Ali Raheem.
  6509. - Use RFC 2397 data URL scheme to embed an image into tor-exit-
  6510. notice.html so that operators no longer have to host it
  6511. themselves. Closes ticket 31089.
  6512. o Removed features:
  6513. - No longer include recommended package digests in votes as detailed
  6514. in proposal 301. The RecommendedPackages torrc option is
  6515. deprecated and will no longer have any effect. "package" lines
  6516. will still be considered when computing consensuses for consensus
  6517. methods that include them. (This change has no effect on the list
  6518. of recommended Tor versions, which is still in use.) Closes
  6519. ticket 29738.
  6520. - Remove torctl.in from contrib/dist directory. Resolves
  6521. ticket 30550.
  6522. o Testing:
  6523. - Run shellcheck for all non-third-party shell scripts that are
  6524. shipped with Tor. Closes ticket 29533.
  6525. - When checking shell scripts, ignore any user-created directories.
  6526. Closes ticket 30967.
  6527. o Code simplification and refactoring (config handling):
  6528. - Extract our variable manipulation code from confparse.c to a new
  6529. lower-level typedvar.h module. Closes ticket 30864.
  6530. - Lower another layer of object management from confparse.c to a
  6531. more general tool. Now typed structure members are accessible via
  6532. an abstract type. Implements ticket 30914.
  6533. - Move our backend logic for working with configuration and state
  6534. files into a lower-level library, since it no longer depends on
  6535. any tor-specific functionality. Closes ticket 31626.
  6536. - Numerous simplifications in configuration-handling logic: remove
  6537. duplicated macro definitions, replace magical names with flags,
  6538. and refactor "TestingTorNetwork" to use the same default-option
  6539. logic as the rest of Tor. Closes ticket 30935.
  6540. - Replace our ad-hoc set of flags for configuration variables and
  6541. configuration variable types with fine-grained orthogonal flags
  6542. corresponding to the actual behavior we want. Closes ticket 31625.
  6543. o Code simplification and refactoring (misc):
  6544. - Eliminate some uses of lower-level control reply abstractions,
  6545. primarily in the onion_helper functions. Closes ticket 30889.
  6546. - Rework bootstrap tracking to use the new publish-subscribe
  6547. subsystem. Closes ticket 29976.
  6548. - Rewrite format_node_description() and router_get_verbose_nickname()
  6549. to use strlcpy() and strlcat(). The previous implementation used
  6550. memcpy() and pointer arithmetic, which was error-prone. Closes
  6551. ticket 31545. This is CID 1452819.
  6552. - Split extrainfo_dump_to_string() into smaller functions. Closes
  6553. ticket 30956.
  6554. - Use the ptrdiff_t type consistently for expressing variable
  6555. offsets and pointer differences. Previously we incorrectly (but
  6556. harmlessly) used int and sometimes off_t for these cases. Closes
  6557. ticket 31532.
  6558. - Use the subsystems mechanism to manage the main event loop code.
  6559. Closes ticket 30806.
  6560. - Various simplifications and minor improvements to the circuit
  6561. padding machines. Patch by Tobias Pulls. Closes tickets 31112
  6562. and 31098.
  6563. o Documentation (hard-coded directories):
  6564. - Improve the documentation for the DirAuthority and FallbackDir
  6565. torrc options. Closes ticket 30955.
  6566. o Documentation (tor.1 man page):
  6567. - Fix typo in tor.1 man page: the option is "--help", not "-help".
  6568. Fixes bug 31008; bugfix on 0.2.2.9-alpha.
  6569. Changes in version 0.4.1.5 - 2019-08-20
  6570. This is the first stable release in the 0.4.1.x series. This series
  6571. adds experimental circuit-level padding, authenticated SENDME cells to
  6572. defend against certain attacks, and several performance improvements
  6573. to save on CPU consumption. It fixes bugs in bootstrapping and v3
  6574. onion services. It also includes numerous smaller features and
  6575. bugfixes on earlier versions.
  6576. Per our support policy, we will support the 0.4.1.x series for nine
  6577. months, or until three months after the release of a stable 0.4.2.x:
  6578. whichever is longer. If you need longer-term support, please stick
  6579. with 0.3.5.x, which will we plan to support until Feb 2022.
  6580. Below are the changes since 0.4.1.4-rc. For a complete list of changes
  6581. since 0.4.0.5, see the ReleaseNotes file.
  6582. o Directory authority changes:
  6583. - The directory authority "dizum" has a new IP address. Closes
  6584. ticket 31406.
  6585. o Minor features (circuit padding logging):
  6586. - Demote noisy client-side warn logs about circuit padding to
  6587. protocol warnings. Add additional log messages and circuit ID
  6588. fields to help with bug 30992 and any other future issues.
  6589. o Minor bugfixes (circuit padding negotiation):
  6590. - Bump the circuit padding protocol version to explicitly signify
  6591. that the HS setup machine support is finalized in 0.4.1.x-stable.
  6592. This also means that 0.4.1.x-alpha clients will not negotiate
  6593. padding with 0.4.1.x-stable relays, and 0.4.1.x-stable clients
  6594. will not negotiate padding with 0.4.1.x-alpha relays (or 0.4.0.x
  6595. relays). Fixes bug 31356; bugfix on 0.4.1.1-alpha.
  6596. o Minor bugfixes (circuit padding):
  6597. - Ignore non-padding cells on padding circuits. This addresses
  6598. various warning messages from subsystems that were not expecting
  6599. padding circuits. Fixes bug 30942; bugfix on 0.4.1.1-alpha.
  6600. o Minor bugfixes (clock skew detection):
  6601. - Don't believe clock skew results from NETINFO cells that appear to
  6602. arrive before we sent the VERSIONS cells they are responding to.
  6603. Previously, we would accept them up to 3 minutes "in the past".
  6604. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
  6605. o Minor bugfixes (compatibility, standards compliance):
  6606. - Fix a bug that would invoke undefined behavior on certain
  6607. operating systems when trying to asprintf() a string exactly
  6608. INT_MAX bytes long. We don't believe this is exploitable, but it's
  6609. better to fix it anyway. Fixes bug 31001; bugfix on 0.2.2.11-alpha.
  6610. Found and fixed by Tobias Stoeckmann.
  6611. o Minor bugfixes (compilation warning):
  6612. - Fix a compilation warning on Windows about casting a function
  6613. pointer for GetTickCount64(). Fixes bug 31374; bugfix
  6614. on 0.2.9.1-alpha.
  6615. o Minor bugfixes (compilation):
  6616. - Avoid using labs() on time_t, which can cause compilation warnings
  6617. on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
  6618. o Minor bugfixes (distribution):
  6619. - Do not ship any temporary files found in the
  6620. scripts/maint/practracker directory. Fixes bug 31311; bugfix
  6621. on 0.4.1.1-alpha.
  6622. o Testing (continuous integration):
  6623. - In Travis, make stem log a controller trace to the console, and
  6624. tail stem's tor log after failure. Closes ticket 30591.
  6625. - In Travis, only run the stem tests that use a tor binary. Closes
  6626. ticket 30694.
  6627. Changes in version 0.4.1.4-rc - 2019-07-25
  6628. Tor 0.4.1.4-rc fixes a few bugs from previous versions of Tor, and
  6629. updates to a new list of fallback directories. If no new bugs are
  6630. found, the next release in the 0.4.1.x serious should be stable.
  6631. o Major bugfixes (circuit build, guard):
  6632. - When considering upgrading circuits from "waiting for guard" to
  6633. "open", always ignore circuits that are marked for close. Otherwise,
  6634. we can end up in the situation where a subsystem is notified that
  6635. a closing circuit has just opened, leading to undesirable
  6636. behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha.
  6637. o Minor features (continuous integration):
  6638. - Our Travis configuration now uses Chutney to run some network
  6639. integration tests automatically. Closes ticket 29280.
  6640. o Minor features (fallback directory list):
  6641. - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc
  6642. in December 2018 (of which ~122 were still functional), with a
  6643. list of 148 fallbacks (70 new, 78 existing, 79 removed) generated
  6644. in June 2019. Closes ticket 28795.
  6645. o Minor bugfixes (circuit padding):
  6646. - On relays, properly check that a padding machine is absent before
  6647. logging a warning about it being absent. Fixes bug 30649; bugfix
  6648. on 0.4.0.1-alpha.
  6649. - Add two NULL checks in unreachable places to silence Coverity (CID
  6650. 144729 and 1447291) and better future-proof ourselves. Fixes bug
  6651. 31024; bugfix on 0.4.1.1-alpha.
  6652. o Minor bugfixes (crash on exit):
  6653. - Avoid a set of possible code paths that could try to use freed
  6654. memory in routerlist_free() while Tor was exiting. Fixes bug
  6655. 31003; bugfix on 0.1.2.2-alpha.
  6656. o Minor bugfixes (logging):
  6657. - Fix a conflict between the flag used for messaging-domain log
  6658. messages, and the LD_NO_MOCK testing flag. Fixes bug 31080; bugfix
  6659. on 0.4.1.1-alpha.
  6660. o Minor bugfixes (memory leaks):
  6661. - Fix a trivial memory leak when parsing an invalid value from a
  6662. download schedule in the configuration. Fixes bug 30894; bugfix
  6663. on 0.3.4.1-alpha.
  6664. o Code simplification and refactoring:
  6665. - Remove some dead code from circpad_machine_remove_token() to fix
  6666. some Coverity warnings (CID 1447298). Fixes bug 31027; bugfix
  6667. on 0.4.1.1-alpha.
  6668. Changes in version 0.4.1.3-alpha - 2019-06-25
  6669. Tor 0.4.1.3-alpha resolves numerous bugs left over from the previous
  6670. alpha, most of them from earlier release series.
  6671. o Major bugfixes (Onion service reachability):
  6672. - Properly clean up the introduction point map when circuits change
  6673. purpose from onion service circuits to pathbias, measurement, or
  6674. other circuit types. This should fix some service-side instances
  6675. of introduction point failure. Fixes bug 29034; bugfix
  6676. on 0.3.2.1-alpha.
  6677. o Minor features (geoip):
  6678. - Update geoip and geoip6 to the June 10 2019 Maxmind GeoLite2
  6679. Country database. Closes ticket 30852.
  6680. o Minor features (logging):
  6681. - Give a more useful assertion failure message if we think we have
  6682. minherit() but we fail to make a region non-inheritable. Give a
  6683. compile-time warning if our support for minherit() is incomplete.
  6684. Closes ticket 30686.
  6685. o Minor bugfixes (circuit isolation):
  6686. - Fix a logic error that prevented the SessionGroup sub-option from
  6687. being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha.
  6688. o Minor bugfixes (continuous integration):
  6689. - Allow the test-stem job to fail in Travis, because it sometimes
  6690. hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha.
  6691. - Skip test_rebind on macOS in Travis, because it is unreliable on
  6692. macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
  6693. - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment
  6694. variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
  6695. o Minor bugfixes (directory authorities):
  6696. - Stop crashing after parsing an unknown descriptor purpose
  6697. annotation. We think this bug can only be triggered by modifying a
  6698. local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha.
  6699. o Minor bugfixes (pluggable transports):
  6700. - When running as a bridge with pluggable transports, always publish
  6701. pluggable transport information in our extrainfo descriptor, even
  6702. if ExtraInfoStatistics is 0. This information is needed by
  6703. BridgeDB. Fixes bug 30956; bugfix on 0.4.1.1-alpha.
  6704. o Documentation:
  6705. - Mention URLs for Travis/Appveyor/Jenkins in ReleasingTor.md.
  6706. Closes ticket 30630.
  6707. Changes in version 0.4.1.2-alpha - 2019-06-06
  6708. Tor 0.4.1.2-alpha resolves numerous bugs--some of them from the
  6709. previous alpha, and some much older. It also contains minor testing
  6710. improvements, and an improvement to the security of our authenticated
  6711. SENDME implementation.
  6712. o Major bugfixes (bridges):
  6713. - Consider our directory information to have changed when our list
  6714. of bridges changes. Previously, Tor would not re-compute the
  6715. status of its directory information when bridges changed, and
  6716. therefore would not realize that it was no longer able to build
  6717. circuits. Fixes part of bug 29875.
  6718. - Do not count previously configured working bridges towards our
  6719. total of working bridges. Previously, when Tor's list of bridges
  6720. changed, it would think that the old bridges were still usable,
  6721. and delay fetching router descriptors for the new ones. Fixes part
  6722. of bug 29875; bugfix on 0.3.0.1-alpha.
  6723. o Major bugfixes (flow control, SENDME):
  6724. - Decrement the stream-level package window after packaging a cell.
  6725. Previously, it was done inside a log_debug() call, meaning that if
  6726. debug logs were not enabled, the decrement would never happen, and
  6727. thus the window would be out of sync with the other end point.
  6728. Fixes bug 30628; bugfix on 0.4.1.1-alpha.
  6729. o Major bugfixes (onion service reachability):
  6730. - Properly clean up the introduction point map and associated state
  6731. when circuits change purpose from onion service circuits to
  6732. pathbias, measurement, or other circuit types. This may fix some
  6733. instances of introduction point failure. Fixes bug 29034; bugfix
  6734. on 0.3.2.1-alpha.
  6735. o Minor features (authenticated SENDME):
  6736. - Ensure that there is enough randomness on every circuit to prevent
  6737. an attacker from successfully predicting the hashes they will need
  6738. to include in authenticated SENDME cells. At a random interval, if
  6739. we have not sent randomness already, we now leave some extra space
  6740. at the end of a cell that we can fill with random bytes. Closes
  6741. ticket 26846.
  6742. o Minor features (continuous integration):
  6743. - When running coverage builds on Travis, we now set
  6744. TOR_TEST_RNG_SEED, to avoid RNG-based coverage differences. Part
  6745. of ticket 28878.
  6746. o Minor features (maintenance):
  6747. - Add a new "make autostyle" target that developers can use to apply
  6748. all automatic Tor style and consistency conversions to the
  6749. codebase. Closes ticket 30539.
  6750. o Minor features (testing):
  6751. - The circuitpadding tests now use a reproducible RNG implementation,
  6752. so that if a test fails, we can learn why. Part of ticket 28878.
  6753. - Tor's tests now support an environment variable, TOR_TEST_RNG_SEED,
  6754. to set the RNG seed for tests that use a reproducible RNG. Part of
  6755. ticket 28878.
  6756. - When running tests in coverage mode, take additional care to make
  6757. our coverage deterministic, so that we can accurately track
  6758. changes in code coverage. Closes ticket 30519.
  6759. o Minor bugfixes (configuration, proxies):
  6760. - Fix a bug that prevented us from supporting SOCKS5 proxies that
  6761. want authentication along with configured (but unused!)
  6762. ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha.
  6763. o Minor bugfixes (controller):
  6764. - POSTDESCRIPTOR requests should work again. Previously, they were
  6765. broken if a "purpose=" flag was specified. Fixes bug 30580; bugfix
  6766. on 0.4.1.1-alpha.
  6767. - Repair the HSFETCH command so that it works again. Previously, it
  6768. expected a body when it shouldn't have. Fixes bug 30646; bugfix
  6769. on 0.4.1.1-alpha.
  6770. o Minor bugfixes (developer tooling):
  6771. - Fix pre-push hook to allow fixup and squash commits when pushing
  6772. to non-upstream git remote. Fixes bug 30286; bugfix
  6773. on 0.4.0.1-alpha.
  6774. o Minor bugfixes (directory authority):
  6775. - Move the "bandwidth-file-headers" line in directory authority
  6776. votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix
  6777. on 0.3.5.1-alpha.
  6778. o Minor bugfixes (NetBSD):
  6779. - Fix usage of minherit() on NetBSD and other platforms that define
  6780. MAP_INHERIT_{ZERO,NONE} instead of INHERIT_{ZERO,NONE}. Fixes bug
  6781. 30614; bugfix on 0.4.0.2-alpha. Patch from Taylor Campbell.
  6782. o Minor bugfixes (out-of-memory handler):
  6783. - When purging the DNS cache because of an out-of-memory condition,
  6784. try purging just the older entries at first. Previously, we would
  6785. always purge the whole thing. Fixes bug 29617; bugfix
  6786. on 0.3.5.1-alpha.
  6787. o Minor bugfixes (portability):
  6788. - Avoid crashing in our tor_vasprintf() implementation on systems
  6789. that define neither vasprintf() nor _vscprintf(). (This bug has
  6790. been here long enough that we question whether people are running
  6791. Tor on such systems, but we're applying the fix out of caution.)
  6792. Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by
  6793. Tobias Stoeckmann.
  6794. o Minor bugfixes (shutdown, libevent, memory safety):
  6795. - Avoid use-after-free bugs when shutting down, by making sure that
  6796. we shut down libevent only after shutting down all of its users.
  6797. We believe these are harmless in practice, since they only occur
  6798. on the shutdown path, and do not involve any attacker-controlled
  6799. data. Fixes bug 30629; bugfix on 0.4.1.1-alpha.
  6800. o Minor bugfixes (static analysis):
  6801. - Fix several spurious Coverity warnings about the unit tests, to
  6802. lower our chances of missing real warnings in the future. Fixes
  6803. bug 30150; bugfix on 0.3.5.1-alpha and various other Tor versions.
  6804. o Testing:
  6805. - Specify torrc paths (with empty files) when launching tor in
  6806. integration tests; refrain from reading user and system torrcs.
  6807. Resolves issue 29702.
  6808. Changes in version 0.4.1.1-alpha - 2019-05-22
  6809. This is the first alpha in the 0.4.1.x series. It introduces
  6810. lightweight circuit padding to make some onion-service circuits harder
  6811. to distinguish, includes a new "authenticated SENDME" feature to make
  6812. certain denial-of-service attacks more difficult, and improves
  6813. performance in several areas.
  6814. o Major features (circuit padding):
  6815. - Onion service clients now add padding cells at the start of their
  6816. INTRODUCE and RENDEZVOUS circuits, to make those circuits' traffic
  6817. look more like general purpose Exit traffic. The overhead for this
  6818. is 2 extra cells in each direction for RENDEZVOUS circuits, and 1
  6819. extra upstream cell and 10 downstream cells for INTRODUCE
  6820. circuits. This feature is only enabled when also supported by the
  6821. circuit's middle node. (Clients may specify fixed middle nodes
  6822. with the MiddleNodes option, and may force-disable this feature
  6823. with the CircuitPadding option.) Closes ticket 28634.
  6824. o Major features (code organization):
  6825. - Tor now includes a generic publish-subscribe message-passing
  6826. subsystem that we can use to organize intermodule dependencies. We
  6827. hope to use this to reduce dependencies between modules that don't
  6828. need to be related, and to generally simplify our codebase. Closes
  6829. ticket 28226.
  6830. o Major features (controller protocol):
  6831. - Controller commands are now parsed using a generalized parsing
  6832. subsystem. Previously, each controller command was responsible for
  6833. parsing its own input, which led to strange inconsistencies.
  6834. Closes ticket 30091.
  6835. o Major features (flow control):
  6836. - Implement authenticated SENDMEs as detailed in proposal 289. A
  6837. SENDME cell now includes the digest of the traffic that it
  6838. acknowledges, so that once an end point receives the SENDME, it
  6839. can confirm the other side's knowledge of the previous cells that
  6840. were sent, and prevent certain types of denial-of-service attacks.
  6841. This behavior is controlled by two new consensus parameters: see
  6842. the proposal for more details. Fixes ticket 26288.
  6843. o Major features (performance):
  6844. - Our node selection algorithm now excludes nodes in linear time.
  6845. Previously, the algorithm was quadratic, which could slow down
  6846. heavily used onion services. Closes ticket 30307.
  6847. o Major features (performance, RNG):
  6848. - Tor now constructs a fast secure pseudorandom number generator for
  6849. each thread, to use when performance is critical. This PRNG is
  6850. based on AES-CTR, using a buffering construction similar to
  6851. libottery and the (newer) OpenBSD arc4random() code. It
  6852. outperforms OpenSSL 1.1.1a's CSPRNG by roughly a factor of 100 for
  6853. small outputs. Although we believe it to be cryptographically
  6854. strong, we are only using it when necessary for performance.
  6855. Implements tickets 29023 and 29536.
  6856. o Major bugfixes (onion service v3):
  6857. - Fix an unreachable bug in which an introduction point could try to
  6858. send an INTRODUCE_ACK with a status code that Trunnel would refuse
  6859. to encode, leading the relay to assert(). We've consolidated the
  6860. ABI values into Trunnel now. Fixes bug 30454; bugfix
  6861. on 0.3.0.1-alpha.
  6862. - Clients can now handle unknown status codes from INTRODUCE_ACK
  6863. cells. (The NACK behavior will stay the same.) This will allow us
  6864. to extend status codes in the future without breaking the normal
  6865. client behavior. Fixes another part of bug 30454; bugfix
  6866. on 0.3.0.1-alpha.
  6867. o Minor features (circuit padding):
  6868. - We now use a fast PRNG when scheduling circuit padding. Part of
  6869. ticket 28636.
  6870. - Allow the padding machine designer to pick the edges of their
  6871. histogram instead of trying to compute them automatically using an
  6872. exponential formula. Resolves some undefined behavior in the case
  6873. of small histograms and allows greater flexibility on machine
  6874. design. Closes ticket 29298; bugfix on 0.4.0.1-alpha.
  6875. - Allow circuit padding machines to hold a circuit open until they
  6876. are done padding it. Closes ticket 28780.
  6877. o Minor features (compile-time modules):
  6878. - Add a "--list-modules" command to print a list of which compile-
  6879. time modules are enabled. Closes ticket 30452.
  6880. o Minor features (continuous integration):
  6881. - Remove sudo configuration lines from .travis.yml as they are no
  6882. longer needed with current Travis build environment. Resolves
  6883. issue 30213.
  6884. - In Travis, show stem's tor log after failure. Closes ticket 30234.
  6885. o Minor features (controller):
  6886. - Add onion service version 3 support to the HSFETCH command.
  6887. Previously, only version 2 onion services were supported. Closes
  6888. ticket 25417. Patch by Neel Chauhan.
  6889. o Minor features (debugging):
  6890. - Introduce tor_assertf() and tor_assertf_nonfatal() to enable
  6891. logging of additional information during assert failure. Now we
  6892. can use format strings to include information for trouble
  6893. shooting. Resolves ticket 29662.
  6894. o Minor features (defense in depth):
  6895. - In smartlist_remove_keeporder(), set unused pointers to NULL, in
  6896. case a bug causes them to be used later. Closes ticket 30176.
  6897. Patch from Tobias Stoeckmann.
  6898. - Tor now uses a cryptographically strong PRNG even for decisions
  6899. that we do not believe are security-sensitive. Previously, for
  6900. performance reasons, we had used a trivially predictable linear
  6901. congruential generator algorithm for certain load-balancing and
  6902. statistical sampling decisions. Now we use our fast RNG in those
  6903. cases. Closes ticket 29542.
  6904. o Minor features (developer tools):
  6905. - Tor's "practracker" test script now checks for files and functions
  6906. that seem too long and complicated. Existing overlong functions
  6907. and files are accepted for now, but should eventually be
  6908. refactored. Closes ticket 29221.
  6909. - Add some scripts used for git maintenance to scripts/git. Closes
  6910. ticket 29391.
  6911. - Call practracker from pre-push and pre-commit git hooks to let
  6912. developers know if they made any code style violations. Closes
  6913. ticket 30051.
  6914. - Add a script to check that each header has a well-formed and
  6915. unique guard macro. Closes ticket 29756.
  6916. o Minor features (geoip):
  6917. - Update geoip and geoip6 to the May 13 2019 Maxmind GeoLite2
  6918. Country database. Closes ticket 30522.
  6919. o Minor features (HTTP tunnel):
  6920. - Return an informative web page when the HTTPTunnelPort is used as
  6921. an HTTP proxy. Closes ticket 27821, patch by "eighthave".
  6922. o Minor features (IPv6, v3 onion services):
  6923. - Make v3 onion services put IPv6 addresses in service descriptors.
  6924. Before this change, service descriptors only contained IPv4
  6925. addresses. Implements 26992.
  6926. o Minor features (modularity):
  6927. - The "--disable-module-dirauth" compile-time option now disables
  6928. even more dirauth-only code. Closes ticket 30345.
  6929. o Minor features (performance):
  6930. - Use OpenSSL's implementations of SHA3 when available (in OpenSSL
  6931. 1.1.1 and later), since they tend to be faster than tiny-keccak.
  6932. Closes ticket 28837.
  6933. o Minor features (testing):
  6934. - Tor's unit test code now contains helper functions to replace the
  6935. PRNG with a deterministic or reproducible version for testing.
  6936. Previously, various tests implemented this in various ways.
  6937. Implements ticket 29732.
  6938. - We now have a script, cov-test-determinism.sh, to identify places
  6939. where our unit test coverage has become nondeterministic. Closes
  6940. ticket 29436.
  6941. - Check that representative subsets of values of `int` and `unsigned
  6942. int` can be represented by `void *`. Resolves issue 29537.
  6943. o Minor bugfixes (bridge authority):
  6944. - Bridge authorities now set bridges as running or non-running when
  6945. about to dump their status to a file. Previously, they set bridges
  6946. as running in response to a GETINFO command, but those shouldn't
  6947. modify data structures. Fixes bug 24490; bugfix on 0.2.0.13-alpha.
  6948. Patch by Neel Chauhan.
  6949. o Minor bugfixes (channel padding statistics):
  6950. - Channel padding write totals and padding-enabled totals are now
  6951. counted properly in relay extrainfo descriptors. Fixes bug 29231;
  6952. bugfix on 0.3.1.1-alpha.
  6953. o Minor bugfixes (circuit padding):
  6954. - Add a "CircuitPadding" torrc option to disable circuit padding.
  6955. Fixes bug 28693; bugfix on 0.4.0.1-alpha.
  6956. - Allow circuit padding machines to specify that they do not
  6957. contribute much overhead, and provide consensus flags and torrc
  6958. options to force clients to only use these low overhead machines.
  6959. Fixes bug 29203; bugfix on 0.4.0.1-alpha.
  6960. - Provide a consensus parameter to fully disable circuit padding, to
  6961. be used in emergency network overload situations. Fixes bug 30173;
  6962. bugfix on 0.4.0.1-alpha.
  6963. - The circuit padding subsystem will no longer schedule padding if
  6964. dormant mode is enabled. Fixes bug 28636; bugfix on 0.4.0.1-alpha.
  6965. - Inspect a circuit-level cell queue before sending padding, to
  6966. avoid sending padding while too much data is already queued. Fixes
  6967. bug 29204; bugfix on 0.4.0.1-alpha.
  6968. - Avoid calling monotime_absolute_usec() in circuit padding machines
  6969. that do not use token removal or circuit RTT estimation. Fixes bug
  6970. 29085; bugfix on 0.4.0.1-alpha.
  6971. o Minor bugfixes (compilation, unusual configurations):
  6972. - Avoid failures when building with the ALL_BUGS_ARE_FATAL option
  6973. due to missing declarations of abort(), and prevent other such
  6974. failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha.
  6975. o Minor bugfixes (controller protocol):
  6976. - Teach the controller parser to distinguish an object preceded by
  6977. an argument list from one without. Previously, it couldn't
  6978. distinguish an argument list from the first line of a multiline
  6979. object. Fixes bug 29984; bugfix on 0.2.3.8-alpha.
  6980. o Minor bugfixes (directory authority, ipv6):
  6981. - Directory authorities with IPv6 support now always mark themselves
  6982. as reachable via IPv6. Fixes bug 24338; bugfix on 0.2.4.1-alpha.
  6983. Patch by Neel Chauhan.
  6984. o Minor bugfixes (documentation):
  6985. - Improve the documentation for using MapAddress with ".exit". Fixes
  6986. bug 30109; bugfix on 0.1.0.1-rc.
  6987. - Improve the monotonic time module and function documentation to
  6988. explain what "monotonic" actually means, and document some results
  6989. that have surprised people. Fixes bug 29640; bugfix
  6990. on 0.2.9.1-alpha.
  6991. - Use proper formatting when providing an example on quoting options
  6992. that contain whitespace. Fixes bug 29635; bugfix on 0.2.3.18-rc.
  6993. o Minor bugfixes (logging):
  6994. - Do not log a warning when running with an OpenSSL version other
  6995. than the one Tor was compiled with, if the two versions should be
  6996. compatible. Previously, we would warn whenever the version was
  6997. different. Fixes bug 30190; bugfix on 0.2.4.2-alpha.
  6998. - Warn operators when the MyFamily option is set but ContactInfo is
  6999. missing, as the latter should be set too. Fixes bug 25110; bugfix
  7000. on 0.3.3.1-alpha.
  7001. o Minor bugfixes (memory leak):
  7002. - Avoid a minor memory leak that could occur on relays when failing
  7003. to create a "keys" directory. Fixes bug 30148; bugfix
  7004. on 0.3.3.1-alpha.
  7005. o Minor bugfixes (onion services):
  7006. - Avoid a GCC 9.1.1 warning (and possible crash depending on libc
  7007. implementation) when failing to load an onion service client
  7008. authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha.
  7009. - When refusing to launch a controller's HSFETCH request because of
  7010. rate-limiting, respond to the controller with a new response,
  7011. "QUERY_RATE_LIMITED". Previously, we would log QUERY_NO_HSDIR for
  7012. this case. Fixes bug 28269; bugfix on 0.3.1.1-alpha. Patch by
  7013. Neel Chauhan.
  7014. - When relaunching a circuit to a rendezvous service, mark the
  7015. circuit as needing high-uptime routers as appropriate. Fixes bug
  7016. 17357; bugfix on 0.1.0.1-rc. Patch by Neel Chauhan.
  7017. - Stop ignoring IPv6 link specifiers sent to v3 onion services.
  7018. (IPv6 support for v3 onion services is still incomplete: see
  7019. ticket 23493 for details.) Fixes bug 23588; bugfix on
  7020. 0.3.2.1-alpha. Patch by Neel Chauhan.
  7021. o Minor bugfixes (onion services, performance):
  7022. - When building circuits to onion services, call tor_addr_parse()
  7023. less often. Previously, we called tor_addr_parse() in
  7024. circuit_is_acceptable() even if its output wasn't used. This
  7025. change should improve performance when building circuits. Fixes
  7026. bug 22210; bugfix on 0.2.8.12. Patch by Neel Chauhan.
  7027. o Minor bugfixes (performance):
  7028. - When checking whether a node is a bridge, use a fast check to make
  7029. sure that its identity is set. Previously, we used a constant-time
  7030. check, which is not necessary in this case. Fixes bug 30308;
  7031. bugfix on 0.3.5.1-alpha.
  7032. o Minor bugfixes (pluggable transports):
  7033. - Tor now sets TOR_PT_EXIT_ON_STDIN_CLOSE=1 for client transports as
  7034. well as servers. Fixes bug 25614; bugfix on 0.2.7.1-alpha.
  7035. o Minor bugfixes (probability distributions):
  7036. - Refactor and improve parts of the probability distribution code
  7037. that made Coverity complain. Fixes bug 29805; bugfix
  7038. on 0.4.0.1-alpha.
  7039. o Minor bugfixes (python):
  7040. - Stop assuming that /usr/bin/python3 exists. For scripts that work
  7041. with python2, use /usr/bin/python. Otherwise, use /usr/bin/env
  7042. python3. Fixes bug 29913; bugfix on 0.2.5.3-alpha.
  7043. o Minor bugfixes (relay):
  7044. - When running as a relay, if IPv6Exit is set to 1 while ExitRelay
  7045. is auto, act as if ExitRelay is 1. Previously, we would ignore
  7046. IPv6Exit if ExitRelay was 0 or auto. Fixes bug 29613; bugfix on
  7047. 0.3.5.1-alpha. Patch by Neel Chauhan.
  7048. o Minor bugfixes (stats):
  7049. - When ExtraInfoStatistics is 0, stop including bandwidth usage
  7050. statistics, GeoIPFile hashes, ServerTransportPlugin lines, and
  7051. bridge statistics by country in extra-info documents. Fixes bug
  7052. 29018; bugfix on 0.2.4.1-alpha.
  7053. o Minor bugfixes (testing):
  7054. - Call setrlimit() to disable core dumps in test_bt_cl.c. Previously
  7055. we used `ulimit -c` in test_bt.sh, which violates POSIX shell
  7056. compatibility. Fixes bug 29061; bugfix on 0.3.5.1-alpha.
  7057. - Fix some incorrect code in the v3 onion service unit tests. Fixes
  7058. bug 29243; bugfix on 0.3.2.1-alpha.
  7059. - In the "routerkeys/*" tests, check the return values of mkdir()
  7060. for possible failures. Fixes bug 29939; bugfix on 0.2.7.2-alpha.
  7061. Found by Coverity as CID 1444254.
  7062. - Split test_utils_general() into several smaller test functions.
  7063. This makes it easier to perform resource deallocation on assert
  7064. failure, and fixes Coverity warnings CID 1444117 and CID 1444118.
  7065. Fixes bug 29823; bugfix on 0.2.9.1-alpha.
  7066. o Minor bugfixes (tor-resolve):
  7067. - Fix a memory leak in tor-resolve that could happen if Tor gave it
  7068. a malformed SOCKS response. (Memory leaks in tor-resolve don't
  7069. actually matter, but it's good to fix them anyway.) Fixes bug
  7070. 30151; bugfix on 0.4.0.1-alpha.
  7071. o Code simplification and refactoring:
  7072. - Abstract out the low-level formatting of replies on the control
  7073. port. Implements ticket 30007.
  7074. - Add several assertions in an attempt to fix some Coverity
  7075. warnings. Closes ticket 30149.
  7076. - Introduce a connection_dir_buf_add() helper function that checks
  7077. for compress_state of dir_connection_t and automatically writes a
  7078. string to directory connection with or without compression.
  7079. Resolves issue 28816.
  7080. - Make the base32_decode() API return the number of bytes written,
  7081. for consistency with base64_decode(). Closes ticket 28913.
  7082. - Move most relay-only periodic events out of mainloop.c into the
  7083. relay subsystem. Closes ticket 30414.
  7084. - Refactor and encapsulate parts of the codebase that manipulate
  7085. crypt_path_t objects. Resolves issue 30236.
  7086. - Refactor several places in our code that Coverity incorrectly
  7087. believed might have memory leaks. Closes ticket 30147.
  7088. - Remove redundant return values in crypto_format, and the
  7089. associated return value checks elsewhere in the code. Make the
  7090. implementations in crypto_format consistent, and remove redundant
  7091. code. Resolves ticket 29660.
  7092. - Rename tor_mem_is_zero() to fast_mem_is_zero(), to emphasize that
  7093. it is not a constant-time function. Closes ticket 30309.
  7094. - Replace hs_desc_link_specifier_t with link_specifier_t, and remove
  7095. all hs_desc_link_specifier_t-specific code. Fixes bug 22781;
  7096. bugfix on 0.3.2.1-alpha.
  7097. - Simplify v3 onion service link specifier handling code. Fixes bug
  7098. 23576; bugfix on 0.3.2.1-alpha.
  7099. - Split crypto_digest.c into NSS code, OpenSSL code, and shared
  7100. code. Resolves ticket 29108.
  7101. - Split control.c into several submodules, in preparation for
  7102. distributing its current responsibilities throughout the codebase.
  7103. Closes ticket 29894.
  7104. - Start to move responsibility for knowing about periodic events to
  7105. the appropriate subsystems, so that the mainloop doesn't need to
  7106. know all the periodic events in the rest of the codebase.
  7107. Implements tickets 30293 and 30294.
  7108. o Documentation:
  7109. - Document how to find git commits and tags for bug fixes in
  7110. CodingStandards.md. Update some file documentation. Closes
  7111. ticket 30261.
  7112. o Removed features:
  7113. - Remove the linux-tor-prio.sh script from contrib/operator-tools
  7114. directory. Resolves issue 29434.
  7115. - Remove the obsolete OpenSUSE initscript. Resolves issue 30076.
  7116. - Remove the obsolete script at contrib/dist/tor.sh.in. Resolves
  7117. issue 30075.
  7118. o Code simplification and refactoring (shell scripts):
  7119. - Clean up many of our shell scripts to fix shellcheck warnings.
  7120. These include autogen.sh (ticket 26069), test_keygen.sh (ticket
  7121. 29062), test_switch_id.sh (ticket 29065), test_rebind.sh (ticket
  7122. 29063), src/test/fuzz/minimize.sh (ticket 30079), test_rust.sh
  7123. (ticket 29064), torify (ticket 29070), asciidoc-helper.sh (29926),
  7124. fuzz_multi.sh (30077), fuzz_static_testcases.sh (ticket 29059),
  7125. nagios-check-tor-authority-cert (ticket 29071),
  7126. src/test/fuzz/fixup_filenames.sh (ticket 30078), test-network.sh
  7127. (ticket 29060), test_key_expiration.sh (ticket 30002),
  7128. zero_length_keys.sh (ticket 29068), and test_workqueue_*.sh
  7129. (ticket 29067).
  7130. o Testing (chutney):
  7131. - In "make test-network-all", test IPv6-only v3 single onion
  7132. services, using the chutney network single-onion-v23-ipv6-md.
  7133. Closes ticket 27251.
  7134. Changes in version 0.4.0.5 - 2019-05-02
  7135. This is the first stable release in the 0.4.0.x series. It contains
  7136. improvements for power management and bootstrap reporting, as well as
  7137. preliminary backend support for circuit padding to prevent some kinds
  7138. of traffic analysis. It also continues our work in refactoring Tor for
  7139. long-term maintainability.
  7140. Per our support policy, we will support the 0.4.0.x series for nine
  7141. months, or until three months after the release of a stable 0.4.1.x:
  7142. whichever is longer. If you need longer-term support, please stick
  7143. with 0.3.5.x, which will we plan to support until Feb 2022.
  7144. Below are the changes since 0.4.0.4-rc. For a complete list of changes
  7145. since 0.3.5.7, see the ReleaseNotes file.
  7146. o Minor features (continuous integration):
  7147. - In Travis, tell timelimit to use stem's backtrace signals, and
  7148. launch python directly from timelimit, so python receives the
  7149. signals from timelimit, rather than make. Closes ticket 30117.
  7150. o Minor features (diagnostic):
  7151. - Add more diagnostic log messages in an attempt to solve the issue
  7152. of NUL bytes appearing in a microdescriptor cache. Related to
  7153. ticket 28223.
  7154. o Minor features (testing):
  7155. - Use the approx_time() function when setting the "Expires" header
  7156. in directory replies, to make them more testable. Needed for
  7157. ticket 30001.
  7158. o Minor bugfixes (rust):
  7159. - Abort on panic in all build profiles, instead of potentially
  7160. unwinding into C code. Fixes bug 27199; bugfix on 0.3.3.1-alpha.
  7161. o Minor bugfixes (shellcheck):
  7162. - Look for scripts in their correct locations during "make
  7163. shellcheck". Previously we had looked in the wrong place during
  7164. out-of-tree builds. Fixes bug 30263; bugfix on 0.4.0.1-alpha.
  7165. o Minor bugfixes (testing):
  7166. - Check the time in the "Expires" header using approx_time(). Fixes
  7167. bug 30001; bugfix on 0.4.0.4-rc.
  7168. o Minor bugfixes (UI):
  7169. - Lower log level of unlink() errors during bootstrap. Fixes bug
  7170. 29930; bugfix on 0.4.0.1-alpha.
  7171. Changes in version 0.4.0.4-rc - 2019-04-11
  7172. Tor 0.4.0.4-rc is the first release candidate in its series; it fixes
  7173. several bugs from earlier versions, including some that had affected
  7174. stability, and one that prevented relays from working with NSS.
  7175. o Major bugfixes (NSS, relay):
  7176. - When running with NSS, disable TLS 1.2 ciphersuites that use
  7177. SHA384 for their PRF. Due to an NSS bug, the TLS key exporters for
  7178. these ciphersuites don't work -- which caused relays to fail to
  7179. handshake with one another when these ciphersuites were enabled.
  7180. Fixes bug 29241; bugfix on 0.3.5.1-alpha.
  7181. o Minor features (bandwidth authority):
  7182. - Make bandwidth authorities ignore relays that are reported in the
  7183. bandwidth file with the flag "vote=0". This change allows us to
  7184. report unmeasured relays for diagnostic reasons without including
  7185. their bandwidth in the bandwidth authorities' vote. Closes
  7186. ticket 29806.
  7187. - When a directory authority is using a bandwidth file to obtain the
  7188. bandwidth values that will be included in the next vote, serve
  7189. this bandwidth file at /tor/status-vote/next/bandwidth. Closes
  7190. ticket 21377.
  7191. o Minor features (circuit padding):
  7192. - Stop warning about undefined behavior in the probability
  7193. distribution tests. Float division by zero may technically be
  7194. undefined behavior in C, but it's well defined in IEEE 754.
  7195. Partial backport of 29298. Closes ticket 29527; bugfix
  7196. on 0.4.0.1-alpha.
  7197. o Minor features (continuous integration):
  7198. - On Travis Rust builds, cleanup Rust registry and refrain from
  7199. caching the "target/" directory to speed up builds. Resolves
  7200. issue 29962.
  7201. o Minor features (dormant mode):
  7202. - Add a DormantCanceledByStartup option to tell Tor that it should
  7203. treat a startup event as cancelling any previous dormant state.
  7204. Integrators should use this option with caution: it should only be
  7205. used if Tor is being started because of something that the user
  7206. did, and not if Tor is being automatically started in the
  7207. background. Closes ticket 29357.
  7208. o Minor features (geoip):
  7209. - Update geoip and geoip6 to the April 2 2019 Maxmind GeoLite2
  7210. Country database. Closes ticket 29992.
  7211. o Minor features (NSS, diagnostic):
  7212. - Try to log an error from NSS (if there is any) and a more useful
  7213. description of our situation if we are using NSS and a call to
  7214. SSL_ExportKeyingMaterial() fails. Diagnostic for ticket 29241.
  7215. o Minor bugfixes (security):
  7216. - Fix a potential double free bug when reading huge bandwidth files.
  7217. The issue is not exploitable in the current Tor network because
  7218. the vulnerable code is only reached when directory authorities
  7219. read bandwidth files, but bandwidth files come from a trusted
  7220. source (usually the authorities themselves). Furthermore, the
  7221. issue is only exploitable in rare (non-POSIX) 32-bit architectures,
  7222. which are not used by any of the current authorities. Fixes bug
  7223. 30040; bugfix on 0.3.5.1-alpha. Bug found and fixed by
  7224. Tobias Stoeckmann.
  7225. - Verify in more places that we are not about to create a buffer
  7226. with more than INT_MAX bytes, to avoid possible OOB access in the
  7227. event of bugs. Fixes bug 30041; bugfix on 0.2.0.16. Found and
  7228. fixed by Tobias Stoeckmann.
  7229. o Minor bugfix (continuous integration):
  7230. - Reset coverage state on disk after Travis CI has finished. This
  7231. should prevent future coverage merge errors from causing the test
  7232. suite for the "process" subsystem to fail. The process subsystem
  7233. was introduced in 0.4.0.1-alpha. Fixes bug 29036; bugfix
  7234. on 0.2.9.15.
  7235. - Terminate test-stem if it takes more than 9.5 minutes to run.
  7236. (Travis terminates the job after 10 minutes of no output.)
  7237. Diagnostic for 29437. Fixes bug 30011; bugfix on 0.3.5.4-alpha.
  7238. o Minor bugfixes (bootstrap reporting):
  7239. - During bootstrap reporting, correctly distinguish pluggable
  7240. transports from plain proxies. Fixes bug 28925; bugfix
  7241. on 0.4.0.1-alpha.
  7242. o Minor bugfixes (C correctness):
  7243. - Fix an unlikely memory leak in consensus_diff_apply(). Fixes bug
  7244. 29824; bugfix on 0.3.1.1-alpha. This is Coverity warning
  7245. CID 1444119.
  7246. o Minor bugfixes (circuitpadding testing):
  7247. - Minor tweaks to avoid rare test failures related to timers and
  7248. monotonic time. Fixes bug 29500; bugfix on 0.4.0.1-alpha.
  7249. o Minor bugfixes (directory authorities):
  7250. - Actually include the bandwidth-file-digest line in directory
  7251. authority votes. Fixes bug 29959; bugfix on 0.4.0.2-alpha.
  7252. o Minor bugfixes (logging):
  7253. - On Windows, when errors cause us to reload a consensus from disk,
  7254. tell the user that we are retrying at log level "notice".
  7255. Previously we only logged this information at "info", which was
  7256. confusing because the errors themselves were logged at "warning".
  7257. Improves previous fix for 28614. Fixes bug 30004; bugfix
  7258. on 0.4.0.2-alpha.
  7259. o Minor bugfixes (pluggable transports):
  7260. - Restore old behavior when it comes to discovering the path of a
  7261. given Pluggable Transport executable file. A change in
  7262. 0.4.0.1-alpha had broken this behavior on paths containing a
  7263. space. Fixes bug 29874; bugfix on 0.4.0.1-alpha.
  7264. o Minor bugfixes (testing):
  7265. - Backport the 0.3.4 src/test/test-network.sh to 0.2.9. We need a
  7266. recent test-network.sh to use new chutney features in CI. Fixes
  7267. bug 29703; bugfix on 0.2.9.1-alpha.
  7268. - Fix a test failure on Windows caused by an unexpected "BUG"
  7269. warning in our tests for tor_gmtime_r(-1). Fixes bug 29922; bugfix
  7270. on 0.2.9.3-alpha.
  7271. o Minor bugfixes (TLS protocol):
  7272. - When classifying a client's selection of TLS ciphers, if the
  7273. client ciphers are not yet available, do not cache the result.
  7274. Previously, we had cached the unavailability of the cipher list
  7275. and never looked again, which in turn led us to assume that the
  7276. client only supported the ancient V1 link protocol. This, in turn,
  7277. was causing Stem integration tests to stall in some cases. Fixes
  7278. bug 30021; bugfix on 0.2.4.8-alpha.
  7279. o Code simplification and refactoring:
  7280. - Introduce a connection_dir_buf_add() helper function that detects
  7281. whether compression is in use, and adds a string accordingly.
  7282. Resolves issue 28816.
  7283. - Refactor handle_get_next_bandwidth() to use
  7284. connection_dir_buf_add(). Implements ticket 29897.
  7285. o Documentation:
  7286. - Clarify that Tor performs stream isolation among *Port listeners
  7287. by default. Resolves issue 29121.
  7288. Changes in version 0.4.0.3-alpha - 2019-03-22
  7289. Tor 0.4.0.3-alpha is the third in its series; it fixes several small
  7290. bugs from earlier versions.
  7291. o Minor features (address selection):
  7292. - Treat the subnet 100.64.0.0/10 as public for some purposes;
  7293. private for others. This subnet is the RFC 6598 (Carrier Grade
  7294. NAT) IP range, and is deployed by many ISPs as an alternative to
  7295. RFC 1918 that does not break existing internal networks. Tor now
  7296. blocks SOCKS and control ports on these addresses and warns users
  7297. if client ports or ExtORPorts are listening on a RFC 6598 address.
  7298. Closes ticket 28525. Patch by Neel Chauhan.
  7299. o Minor features (geoip):
  7300. - Update geoip and geoip6 to the March 4 2019 Maxmind GeoLite2
  7301. Country database. Closes ticket 29666.
  7302. o Minor bugfixes (circuitpadding):
  7303. - Inspect the circuit-level cell queue before sending padding, to
  7304. avoid sending padding when too much data is queued. Fixes bug
  7305. 29204; bugfix on 0.4.0.1-alpha.
  7306. o Minor bugfixes (logging):
  7307. - Correct a misleading error message when IPv4Only or IPv6Only is
  7308. used but the resolved address can not be interpreted as an address
  7309. of the specified IP version. Fixes bug 13221; bugfix on
  7310. 0.2.3.9-alpha. Patch from Kris Katterjohn.
  7311. - Log the correct port number for listening sockets when "auto" is
  7312. used to let Tor pick the port number. Previously, port 0 was
  7313. logged instead of the actual port number. Fixes bug 29144; bugfix
  7314. on 0.3.5.1-alpha. Patch from Kris Katterjohn.
  7315. - Stop logging a BUG() warning when Tor is waiting for exit
  7316. descriptors. Fixes bug 28656; bugfix on 0.3.5.1-alpha.
  7317. o Minor bugfixes (memory management):
  7318. - Refactor the shared random state's memory management so that it
  7319. actually takes ownership of the shared random value pointers.
  7320. Fixes bug 29706; bugfix on 0.2.9.1-alpha.
  7321. o Minor bugfixes (memory management, testing):
  7322. - Stop leaking parts of the shared random state in the shared-random
  7323. unit tests. Fixes bug 29599; bugfix on 0.2.9.1-alpha.
  7324. o Minor bugfixes (pluggable transports):
  7325. - Fix an assertion failure crash bug when a pluggable transport is
  7326. terminated during the bootstrap phase. Fixes bug 29562; bugfix
  7327. on 0.4.0.1-alpha.
  7328. o Minor bugfixes (Rust, protover):
  7329. - Add a missing "Padding" value to the Rust implementation of
  7330. protover. Fixes bug 29631; bugfix on 0.4.0.1-alpha.
  7331. o Minor bugfixes (single onion services):
  7332. - Allow connections to single onion services to remain idle without
  7333. being disconnected. Previously, relays acting as rendezvous points
  7334. for single onion services were mistakenly closing idle rendezvous
  7335. circuits after 60 seconds, thinking that they were unused
  7336. directory-fetching circuits that had served their purpose. Fixes
  7337. bug 29665; bugfix on 0.2.1.26.
  7338. o Minor bugfixes (stats):
  7339. - When ExtraInfoStatistics is 0, stop including PaddingStatistics in
  7340. relay and bridge extra-info documents. Fixes bug 29017; bugfix
  7341. on 0.3.1.1-alpha.
  7342. o Minor bugfixes (testing):
  7343. - Downgrade some LOG_ERR messages in the address/* tests to
  7344. warnings. The LOG_ERR messages were occurring when we had no
  7345. configured network. We were failing the unit tests, because we
  7346. backported 28668 to 0.3.5.8, but did not backport 29530. Fixes bug
  7347. 29530; bugfix on 0.3.5.8.
  7348. - Fix our gcov wrapper script to look for object files at the
  7349. correct locations. Fixes bug 29435; bugfix on 0.3.5.1-alpha.
  7350. - Decrease the false positive rate of stochastic probability
  7351. distribution tests. Fixes bug 29693; bugfix on 0.4.0.1-alpha.
  7352. o Minor bugfixes (Windows, CI):
  7353. - Skip the Appveyor 32-bit Windows Server 2016 job, and 64-bit
  7354. Windows Server 2012 R2 job. The remaining 2 jobs still provide
  7355. coverage of 64/32-bit, and Windows Server 2016/2012 R2. Also set
  7356. fast_finish, so failed jobs terminate the build immediately. Fixes
  7357. bug 29601; bugfix on 0.3.5.4-alpha.
  7358. Changes in version 0.3.5.8 - 2019-02-21
  7359. Tor 0.3.5.8 backports several fixes from later releases, including fixes
  7360. for an annoying SOCKS-parsing bug that affected users in earlier 0.3.5.x
  7361. releases.
  7362. It also includes a fix for a medium-severity security bug affecting Tor
  7363. 0.3.2.1-alpha and later. All Tor instances running an affected release
  7364. should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
  7365. o Major bugfixes (cell scheduler, KIST, security):
  7366. - Make KIST consider the outbuf length when computing what it can
  7367. put in the outbuf. Previously, KIST acted as though the outbuf
  7368. were empty, which could lead to the outbuf becoming too full. It
  7369. is possible that an attacker could exploit this bug to cause a Tor
  7370. client or relay to run out of memory and crash. Fixes bug 29168;
  7371. bugfix on 0.3.2.1-alpha. This issue is also being tracked as
  7372. TROVE-2019-001 and CVE-2019-8955.
  7373. o Major bugfixes (networking, backport from 0.4.0.2-alpha):
  7374. - Gracefully handle empty username/password fields in SOCKS5
  7375. username/password auth message and allow SOCKS5 handshake to
  7376. continue. Previously, we had rejected these handshakes, breaking
  7377. certain applications. Fixes bug 29175; bugfix on 0.3.5.1-alpha.
  7378. o Minor features (compilation, backport from 0.4.0.2-alpha):
  7379. - Compile correctly when OpenSSL is built with engine support
  7380. disabled, or with deprecated APIs disabled. Closes ticket 29026.
  7381. Patches from "Mangix".
  7382. o Minor features (geoip):
  7383. - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
  7384. Country database. Closes ticket 29478.
  7385. o Minor features (testing, backport from 0.4.0.2-alpha):
  7386. - Treat all unexpected ERR and BUG messages as test failures. Closes
  7387. ticket 28668.
  7388. o Minor bugfixes (onion service v3, client, backport from 0.4.0.1-alpha):
  7389. - Stop logging a "BUG()" warning and stacktrace when we find a SOCKS
  7390. connection waiting for a descriptor that we actually have in the
  7391. cache. It turns out that this can actually happen, though it is
  7392. rare. Now, tor will recover and retry the descriptor. Fixes bug
  7393. 28669; bugfix on 0.3.2.4-alpha.
  7394. o Minor bugfixes (IPv6, backport from 0.4.0.1-alpha):
  7395. - Fix tor_ersatz_socketpair on IPv6-only systems. Previously, the
  7396. IPv6 socket was bound using an address family of AF_INET instead
  7397. of AF_INET6. Fixes bug 28995; bugfix on 0.3.5.1-alpha. Patch from
  7398. Kris Katterjohn.
  7399. o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha):
  7400. - Update Cargo.lock file to match the version made by the latest
  7401. version of Rust, so that "make distcheck" will pass again. Fixes
  7402. bug 29244; bugfix on 0.3.3.4-alpha.
  7403. o Minor bugfixes (client, clock skew, backport from 0.4.0.1-alpha):
  7404. - Select guards even if the consensus has expired, as long as the
  7405. consensus is still reasonably live. Fixes bug 24661; bugfix
  7406. on 0.3.0.1-alpha.
  7407. o Minor bugfixes (compilation, backport from 0.4.0.1-alpha):
  7408. - Compile correctly on OpenBSD; previously, we were missing some
  7409. headers required in order to detect it properly. Fixes bug 28938;
  7410. bugfix on 0.3.5.1-alpha. Patch from Kris Katterjohn.
  7411. o Minor bugfixes (documentation, backport from 0.4.0.2-alpha):
  7412. - Describe the contents of the v3 onion service client authorization
  7413. files correctly: They hold public keys, not private keys. Fixes
  7414. bug 28979; bugfix on 0.3.5.1-alpha. Spotted by "Felixix".
  7415. o Minor bugfixes (logging, backport from 0.4.0.1-alpha):
  7416. - Rework rep_hist_log_link_protocol_counts() to iterate through all
  7417. link protocol versions when logging incoming/outgoing connection
  7418. counts. Tor no longer skips version 5, and we won't have to
  7419. remember to update this function when new link protocol version is
  7420. developed. Fixes bug 28920; bugfix on 0.2.6.10.
  7421. o Minor bugfixes (logging, backport from 0.4.0.2-alpha):
  7422. - Log more information at "warning" level when unable to read a
  7423. private key; log more information at "info" level when unable to
  7424. read a public key. We had warnings here before, but they were lost
  7425. during our NSS work. Fixes bug 29042; bugfix on 0.3.5.1-alpha.
  7426. o Minor bugfixes (misc, backport from 0.4.0.2-alpha):
  7427. - The amount of total available physical memory is now determined
  7428. using the sysctl identifier HW_PHYSMEM (rather than HW_USERMEM)
  7429. when it is defined and a 64-bit variant is not available. Fixes
  7430. bug 28981; bugfix on 0.2.5.4-alpha. Patch from Kris Katterjohn.
  7431. o Minor bugfixes (onion services, backport from 0.4.0.2-alpha):
  7432. - Avoid crashing if ClientOnionAuthDir (incorrectly) contains more
  7433. than one private key for a hidden service. Fixes bug 29040; bugfix
  7434. on 0.3.5.1-alpha.
  7435. - In hs_cache_store_as_client() log an HSDesc we failed to parse at
  7436. "debug" level. Tor used to log it as a warning, which caused very
  7437. long log lines to appear for some users. Fixes bug 29135; bugfix
  7438. on 0.3.2.1-alpha.
  7439. - Stop logging "Tried to establish rendezvous on non-OR circuit..."
  7440. as a warning. Instead, log it as a protocol warning, because there
  7441. is nothing that relay operators can do to fix it. Fixes bug 29029;
  7442. bugfix on 0.2.5.7-rc.
  7443. o Minor bugfixes (tests, directory clients, backport from 0.4.0.1-alpha):
  7444. - Mark outdated dirservers when Tor only has a reasonably live
  7445. consensus. Fixes bug 28569; bugfix on 0.3.2.5-alpha.
  7446. o Minor bugfixes (tests, backport from 0.4.0.2-alpha):
  7447. - Detect and suppress "bug" warnings from the util/time test on
  7448. Windows. Fixes bug 29161; bugfix on 0.2.9.3-alpha.
  7449. - Do not log an error-level message if we fail to find an IPv6
  7450. network interface from the unit tests. Fixes bug 29160; bugfix
  7451. on 0.2.7.3-rc.
  7452. o Minor bugfixes (usability, backport from 0.4.0.1-alpha):
  7453. - Stop saying "Your Guard ..." in pathbias_measure_{use,close}_rate().
  7454. Some users took this phrasing to mean that the mentioned guard was
  7455. under their control or responsibility, which it is not. Fixes bug
  7456. 28895; bugfix on Tor 0.3.0.1-alpha.
  7457. Changes in version 0.3.4.11 - 2019-02-21
  7458. Tor 0.3.4.11 is the third stable release in its series. It includes
  7459. a fix for a medium-severity security bug affecting Tor 0.3.2.1-alpha and
  7460. later. All Tor instances running an affected release should upgrade to
  7461. 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
  7462. o Major bugfixes (cell scheduler, KIST, security):
  7463. - Make KIST consider the outbuf length when computing what it can
  7464. put in the outbuf. Previously, KIST acted as though the outbuf
  7465. were empty, which could lead to the outbuf becoming too full. It
  7466. is possible that an attacker could exploit this bug to cause a Tor
  7467. client or relay to run out of memory and crash. Fixes bug 29168;
  7468. bugfix on 0.3.2.1-alpha. This issue is also being tracked as
  7469. TROVE-2019-001 and CVE-2019-8955.
  7470. o Minor features (geoip):
  7471. - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
  7472. Country database. Closes ticket 29478.
  7473. o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha):
  7474. - Update Cargo.lock file to match the version made by the latest
  7475. version of Rust, so that "make distcheck" will pass again. Fixes
  7476. bug 29244; bugfix on 0.3.3.4-alpha.
  7477. o Minor bugfixes (onion services, backport from 0.4.0.2-alpha):
  7478. - Stop logging "Tried to establish rendezvous on non-OR circuit..."
  7479. as a warning. Instead, log it as a protocol warning, because there
  7480. is nothing that relay operators can do to fix it. Fixes bug 29029;
  7481. bugfix on 0.2.5.7-rc.
  7482. Changes in version 0.3.3.12 - 2019-02-21
  7483. Tor 0.3.3.12 fixes a medium-severity security bug affecting Tor
  7484. 0.3.2.1-alpha and later. All Tor instances running an affected release
  7485. should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
  7486. This release marks the end of support for the Tor 0.3.3.x series. We
  7487. recommend that users switch to either the Tor 0.3.4 series (supported
  7488. until at least 10 June 2019), or the Tor 0.3.5 series, which will
  7489. receive long-term support until at least 1 Feb 2022.
  7490. o Major bugfixes (cell scheduler, KIST, security):
  7491. - Make KIST consider the outbuf length when computing what it can
  7492. put in the outbuf. Previously, KIST acted as though the outbuf
  7493. were empty, which could lead to the outbuf becoming too full. It
  7494. is possible that an attacker could exploit this bug to cause a Tor
  7495. client or relay to run out of memory and crash. Fixes bug 29168;
  7496. bugfix on 0.3.2.1-alpha. This issue is also being tracked as
  7497. TROVE-2019-001 and CVE-2019-8955.
  7498. o Minor features (geoip):
  7499. - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
  7500. Country database. Closes ticket 29478.
  7501. o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha):
  7502. - Update Cargo.lock file to match the version made by the latest
  7503. version of Rust, so that "make distcheck" will pass again. Fixes
  7504. bug 29244; bugfix on 0.3.3.4-alpha.
  7505. o Minor bugfixes (onion services, backport from 0.4.0.2-alpha):
  7506. - Stop logging "Tried to establish rendezvous on non-OR circuit..."
  7507. as a warning. Instead, log it as a protocol warning, because there
  7508. is nothing that relay operators can do to fix it. Fixes bug 29029;
  7509. bugfix on 0.2.5.7-rc.
  7510. Changes in version 0.4.0.2-alpha - 2019-02-21
  7511. Tor 0.4.0.2-alpha is the second alpha in its series; it fixes several
  7512. bugs from earlier versions, including several that had broken
  7513. backward compatibility.
  7514. It also includes a fix for a medium-severity security bug affecting Tor
  7515. 0.3.2.1-alpha and later. All Tor instances running an affected release
  7516. should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
  7517. o Major bugfixes (cell scheduler, KIST, security):
  7518. - Make KIST consider the outbuf length when computing what it can
  7519. put in the outbuf. Previously, KIST acted as though the outbuf
  7520. were empty, which could lead to the outbuf becoming too full. It
  7521. is possible that an attacker could exploit this bug to cause a Tor
  7522. client or relay to run out of memory and crash. Fixes bug 29168;
  7523. bugfix on 0.3.2.1-alpha. This issue is also being tracked as
  7524. TROVE-2019-001 and CVE-2019-8955.
  7525. o Major bugfixes (networking):
  7526. - Gracefully handle empty username/password fields in SOCKS5
  7527. username/password auth messsage and allow SOCKS5 handshake to
  7528. continue. Previously, we had rejected these handshakes, breaking
  7529. certain applications. Fixes bug 29175; bugfix on 0.3.5.1-alpha.
  7530. o Major bugfixes (windows, startup):
  7531. - When reading a consensus file from disk, detect whether it was
  7532. written in text mode, and re-read it in text mode if so. Always
  7533. write consensus files in binary mode so that we can map them into
  7534. memory later. Previously, we had written in text mode, which
  7535. confused us when we tried to map the file on windows. Fixes bug
  7536. 28614; bugfix on 0.4.0.1-alpha.
  7537. o Minor features (compilation):
  7538. - Compile correctly when OpenSSL is built with engine support
  7539. disabled, or with deprecated APIs disabled. Closes ticket 29026.
  7540. Patches from "Mangix".
  7541. o Minor features (developer tooling):
  7542. - Check that bugfix versions in changes files look like Tor versions
  7543. from the versions spec. Warn when bugfixes claim to be on a future
  7544. release. Closes ticket 27761.
  7545. - Provide a git pre-commit hook that disallows committing if we have
  7546. any failures in our code and changelog formatting checks. It is
  7547. now available in scripts/maint/pre-commit.git-hook. Implements
  7548. feature 28976.
  7549. o Minor features (directory authority):
  7550. - When a directory authority is using a bandwidth file to obtain
  7551. bandwidth values, include the digest of that file in the vote.
  7552. Closes ticket 26698.
  7553. o Minor features (geoip):
  7554. - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
  7555. Country database. Closes ticket 29478.
  7556. o Minor features (testing):
  7557. - Treat all unexpected ERR and BUG messages as test failures. Closes
  7558. ticket 28668.
  7559. o Minor bugfixes (build, compatibility, rust):
  7560. - Update Cargo.lock file to match the version made by the latest
  7561. version of Rust, so that "make distcheck" will pass again. Fixes
  7562. bug 29244; bugfix on 0.3.3.4-alpha.
  7563. o Minor bugfixes (compilation):
  7564. - Fix compilation warnings in test_circuitpadding.c. Fixes bug
  7565. 29169; bugfix on 0.4.0.1-alpha.
  7566. - Silence a compiler warning in test-memwipe.c on OpenBSD. Fixes bug
  7567. 29145; bugfix on 0.2.9.3-alpha. Patch from Kris Katterjohn.
  7568. o Minor bugfixes (documentation):
  7569. - Describe the contents of the v3 onion service client authorization
  7570. files correctly: They hold public keys, not private keys. Fixes
  7571. bug 28979; bugfix on 0.3.5.1-alpha. Spotted by "Felixix".
  7572. o Minor bugfixes (linux seccomp sandbox):
  7573. - Fix startup crash when experimental sandbox support is enabled.
  7574. Fixes bug 29150; bugfix on 0.4.0.1-alpha. Patch by Peter Gerber.
  7575. o Minor bugfixes (logging):
  7576. - Avoid logging that we are relaxing a circuit timeout when that
  7577. timeout is fixed. Fixes bug 28698; bugfix on 0.2.4.7-alpha.
  7578. - Log more information at "warning" level when unable to read a
  7579. private key; log more information at "info" level when unable to
  7580. read a public key. We had warnings here before, but they were lost
  7581. during our NSS work. Fixes bug 29042; bugfix on 0.3.5.1-alpha.
  7582. o Minor bugfixes (misc):
  7583. - The amount of total available physical memory is now determined
  7584. using the sysctl identifier HW_PHYSMEM (rather than HW_USERMEM)
  7585. when it is defined and a 64-bit variant is not available. Fixes
  7586. bug 28981; bugfix on 0.2.5.4-alpha. Patch from Kris Katterjohn.
  7587. o Minor bugfixes (onion services):
  7588. - Avoid crashing if ClientOnionAuthDir (incorrectly) contains more
  7589. than one private key for a hidden service. Fixes bug 29040; bugfix
  7590. on 0.3.5.1-alpha.
  7591. - In hs_cache_store_as_client() log an HSDesc we failed to parse at
  7592. "debug" level. Tor used to log it as a warning, which caused very
  7593. long log lines to appear for some users. Fixes bug 29135; bugfix
  7594. on 0.3.2.1-alpha.
  7595. - Stop logging "Tried to establish rendezvous on non-OR circuit..."
  7596. as a warning. Instead, log it as a protocol warning, because there
  7597. is nothing that relay operators can do to fix it. Fixes bug 29029;
  7598. bugfix on 0.2.5.7-rc.
  7599. o Minor bugfixes (scheduler):
  7600. - When re-adding channels to the pending list, check the correct
  7601. channel's sched_heap_idx. This issue has had no effect in mainline
  7602. Tor, but could have led to bugs down the road in improved versions
  7603. of our circuit scheduling code. Fixes bug 29508; bugfix
  7604. on 0.3.2.10.
  7605. o Minor bugfixes (tests):
  7606. - Fix intermittent failures on an adaptive padding test. Fixes one
  7607. case of bug 29122; bugfix on 0.4.0.1-alpha.
  7608. - Disable an unstable circuit-padding test that was failing
  7609. intermittently because of an ill-defined small histogram. Such
  7610. histograms will be allowed again after 29298 is implemented. Fixes
  7611. a second case of bug 29122; bugfix on 0.4.0.1-alpha.
  7612. - Detect and suppress "bug" warnings from the util/time test on
  7613. Windows. Fixes bug 29161; bugfix on 0.2.9.3-alpha.
  7614. - Do not log an error-level message if we fail to find an IPv6
  7615. network interface from the unit tests. Fixes bug 29160; bugfix
  7616. on 0.2.7.3-rc.
  7617. o Documentation:
  7618. - In the manpage entry describing MapAddress torrc setting, use
  7619. example IP addresses from ranges specified for use in documentation
  7620. by RFC 5737. Resolves issue 28623.
  7621. o Removed features:
  7622. - Remove the old check-tor script. Resolves issue 29072.
  7623. Changes in version 0.4.0.1-alpha - 2019-01-18
  7624. Tor 0.4.0.1-alpha is the first release in the new 0.4.0.x series. It
  7625. introduces improved features for power and bandwidth conservation,
  7626. more accurate reporting of bootstrap progress for user interfaces, and
  7627. an experimental backend for an exciting new adaptive padding feature.
  7628. There is also the usual assortment of bugfixes and minor features, all
  7629. described below.
  7630. o Major features (battery management, client, dormant mode):
  7631. - When Tor is running as a client, and it is unused for a long time,
  7632. it can now enter a "dormant" state. When Tor is dormant, it avoids
  7633. network and CPU activity until it is reawoken either by a user
  7634. request or by a controller command. For more information, see the
  7635. configuration options starting with "Dormant". Implements tickets
  7636. 2149 and 28335.
  7637. - The client's memory of whether it is "dormant", and how long it
  7638. has spent idle, persists across invocations. Implements
  7639. ticket 28624.
  7640. - There is a DormantOnFirstStartup option that integrators can use
  7641. if they expect that in many cases, Tor will be installed but
  7642. not used.
  7643. o Major features (bootstrap reporting):
  7644. - When reporting bootstrap progress, report the first connection
  7645. uniformly, regardless of whether it's a connection for building
  7646. application circuits. This allows finer-grained reporting of early
  7647. progress than previously possible, with the improvements of ticket
  7648. 27169. Closes tickets 27167 and 27103. Addresses ticket 27308.
  7649. - When reporting bootstrap progress, treat connecting to a proxy or
  7650. pluggable transport as separate from having successfully used that
  7651. proxy or pluggable transport to connect to a relay. Closes tickets
  7652. 27100 and 28884.
  7653. o Major features (circuit padding):
  7654. - Implement preliminary support for the circuit padding portion of
  7655. Proposal 254. The implementation supports Adaptive Padding (aka
  7656. WTF-PAD) state machines for use between experimental clients and
  7657. relays. Support is also provided for APE-style state machines that
  7658. use probability distributions instead of histograms to specify
  7659. inter-packet delay. At the moment, Tor does not provide any
  7660. padding state machines that are used in normal operation: for now,
  7661. this feature exists solely for experimentation. Closes
  7662. ticket 28142.
  7663. o Major features (refactoring):
  7664. - Tor now uses an explicit list of its own subsystems when
  7665. initializing and shutting down. Previously, these systems were
  7666. managed implicitly in various places throughout the codebase.
  7667. (There may still be some subsystems using the old system.) Closes
  7668. ticket 28330.
  7669. o Minor features (bootstrap reporting):
  7670. - When reporting bootstrap progress, stop distinguishing between
  7671. situations where only internal paths are available and situations
  7672. where external paths are available. Previously, Tor would often
  7673. erroneously report that it had only internal paths. Closes
  7674. ticket 27402.
  7675. o Minor features (continuous integration):
  7676. - Log Python version during each Travis CI job. Resolves
  7677. issue 28551.
  7678. o Minor features (controller):
  7679. - Add a DROPOWNERSHIP command to undo the effects of TAKEOWNERSHIP.
  7680. Implements ticket 28843.
  7681. o Minor features (developer tooling):
  7682. - Provide a git hook script to prevent "fixup!" and "squash!"
  7683. commits from ending up in the master branch, as scripts/main/pre-
  7684. push.git-hook. Closes ticket 27993.
  7685. o Minor features (directory authority):
  7686. - Directory authorities support a new consensus algorithm, under
  7687. which the family lines in microdescriptors are encoded in a
  7688. canonical form. This change makes family lines more compressible
  7689. in transit, and on the client. Closes ticket 28266; implements
  7690. proposal 298.
  7691. o Minor features (directory authority, relay):
  7692. - Authorities now vote on a "StaleDesc" flag to indicate that a
  7693. relay's descriptor is so old that the relay should upload again
  7694. soon. Relays treat this flag as a signal to upload a new
  7695. descriptor. This flag will eventually let us remove the
  7696. 'published' date from routerstatus entries, and make our consensus
  7697. diffs much smaller. Closes ticket 26770; implements proposal 293.
  7698. o Minor features (fallback directory mirrors):
  7699. - Update the fallback whitelist based on operator opt-ins and opt-
  7700. outs. Closes ticket 24805, patch by Phoul.
  7701. o Minor features (FreeBSD):
  7702. - On FreeBSD-based systems, warn relay operators if the
  7703. "net.inet.ip.random_id" sysctl (IP ID randomization) is disabled.
  7704. Closes ticket 28518.
  7705. o Minor features (HTTP standards compliance):
  7706. - Stop sending the header "Content-type: application/octet-stream"
  7707. along with transparently compressed documents: this confused
  7708. browsers. Closes ticket 28100.
  7709. o Minor features (IPv6):
  7710. - We add an option ClientAutoIPv6ORPort, to make clients randomly
  7711. prefer a node's IPv4 or IPv6 ORPort. The random preference is set
  7712. every time a node is loaded from a new consensus or bridge config.
  7713. We expect that this option will enable clients to bootstrap more
  7714. quickly without having to determine whether they support IPv4,
  7715. IPv6, or both. Closes ticket 27490. Patch by Neel Chauhan.
  7716. - When using addrs_in_same_network_family(), avoid choosing circuit
  7717. paths that pass through the same IPv6 subnet more than once.
  7718. Previously, we only checked IPv4 subnets. Closes ticket 24393.
  7719. Patch by Neel Chauhan.
  7720. o Minor features (log messages):
  7721. - Improve log message in v3 onion services that could print out
  7722. negative revision counters. Closes ticket 27707. Patch
  7723. by "ffmancera".
  7724. o Minor features (memory usage):
  7725. - Save memory by storing microdescriptor family lists with a more
  7726. compact representation. Closes ticket 27359.
  7727. - Tor clients now use mmap() to read consensus files from disk, so
  7728. that they no longer need keep the full text of a consensus in
  7729. memory when parsing it or applying a diff. Closes ticket 27244.
  7730. o Minor features (parsing):
  7731. - Directory authorities now validate that router descriptors and
  7732. ExtraInfo documents are in a valid subset of UTF-8, and reject
  7733. them if they are not. Closes ticket 27367.
  7734. o Minor features (performance):
  7735. - Cache the results of summarize_protocol_flags(), so that we don't
  7736. have to parse the same protocol-versions string over and over.
  7737. This should save us a huge number of malloc calls on startup, and
  7738. may reduce memory fragmentation with some allocators. Closes
  7739. ticket 27225.
  7740. - Remove a needless memset() call from get_token_arguments, thereby
  7741. speeding up the tokenization of directory objects by about 20%.
  7742. Closes ticket 28852.
  7743. - Replace parse_short_policy() with a faster implementation, to
  7744. improve microdescriptor parsing time. Closes ticket 28853.
  7745. - Speed up directory parsing a little by avoiding use of the non-
  7746. inlined strcmp_len() function. Closes ticket 28856.
  7747. - Speed up microdescriptor parsing by about 30%, to help improve
  7748. startup time. Closes ticket 28839.
  7749. o Minor features (pluggable transports):
  7750. - Add support for emitting STATUS updates to Tor's control port from
  7751. a pluggable transport process. Closes ticket 28846.
  7752. - Add support for logging to Tor's logging subsystem from a
  7753. pluggable transport process. Closes ticket 28180.
  7754. o Minor features (process management):
  7755. - Add a new process API for handling child processes. This new API
  7756. allows Tor to have bi-directional communication with child
  7757. processes on both Unix and Windows. Closes ticket 28179.
  7758. - Use the subsystem manager to initialize and shut down the process
  7759. module. Closes ticket 28847.
  7760. o Minor features (relay):
  7761. - When listing relay families, list them in canonical form including
  7762. the relay's own identity, and try to give a more useful set of
  7763. warnings. Part of ticket 28266 and proposal 298.
  7764. o Minor features (required protocols):
  7765. - Before exiting because of a missing required protocol, Tor will
  7766. now check the publication time of the consensus, and not exit
  7767. unless the consensus is newer than the Tor program's own release
  7768. date. Previously, Tor would not check the consensus publication
  7769. time, and so might exit because of a missing protocol that might
  7770. no longer be required in a current consensus. Implements proposal
  7771. 297; closes ticket 27735.
  7772. o Minor features (testing):
  7773. - Allow a HeartbeatPeriod of less than 30 minutes in testing Tor
  7774. networks. Closes ticket 28840. Patch by Rob Jansen.
  7775. o Minor bugfixes (client, clock skew):
  7776. - Bootstrap successfully even when Tor's clock is behind the clocks
  7777. on the authorities. Fixes bug 28591; bugfix on 0.2.0.9-alpha.
  7778. - Select guards even if the consensus has expired, as long as the
  7779. consensus is still reasonably live. Fixes bug 24661; bugfix
  7780. on 0.3.0.1-alpha.
  7781. o Minor bugfixes (compilation):
  7782. - Compile correctly on OpenBSD; previously, we were missing some
  7783. headers required in order to detect it properly. Fixes bug 28938;
  7784. bugfix on 0.3.5.1-alpha. Patch from Kris Katterjohn.
  7785. o Minor bugfixes (directory clients):
  7786. - Mark outdated dirservers when Tor only has a reasonably live
  7787. consensus. Fixes bug 28569; bugfix on 0.3.2.5-alpha.
  7788. o Minor bugfixes (directory mirrors):
  7789. - Even when a directory mirror's clock is behind the clocks on the
  7790. authorities, we now allow the mirror to serve "future"
  7791. consensuses. Fixes bug 28654; bugfix on 0.3.0.1-alpha.
  7792. o Minor bugfixes (DNS):
  7793. - Gracefully handle an empty or absent resolve.conf file by falling
  7794. back to using "localhost" as a DNS server (and hoping it works).
  7795. Previously, we would just stop running as an exit. Fixes bug
  7796. 21900; bugfix on 0.2.1.10-alpha.
  7797. o Minor bugfixes (guards):
  7798. - In count_acceptable_nodes(), the minimum number is now one bridge
  7799. or guard node, and two non-guard nodes for a circuit. Previously,
  7800. we had added up the sum of all nodes with a descriptor, but that
  7801. could cause us to build failing circuits when we had either too
  7802. many bridges or not enough guard nodes. Fixes bug 25885; bugfix on
  7803. 0.2.3.1-alpha. Patch by Neel Chauhan.
  7804. o Minor bugfixes (IPv6):
  7805. - Fix tor_ersatz_socketpair on IPv6-only systems. Previously, the
  7806. IPv6 socket was bound using an address family of AF_INET instead
  7807. of AF_INET6. Fixes bug 28995; bugfix on 0.3.5.1-alpha. Patch from
  7808. Kris Katterjohn.
  7809. o Minor bugfixes (logging):
  7810. - Rework rep_hist_log_link_protocol_counts() to iterate through all
  7811. link protocol versions when logging incoming/outgoing connection
  7812. counts. Tor no longer skips version 5, and we won't have to
  7813. remember to update this function when new link protocol version is
  7814. developed. Fixes bug 28920; bugfix on 0.2.6.10.
  7815. o Minor bugfixes (networking):
  7816. - Introduce additional checks into tor_addr_parse() to reject
  7817. certain incorrect inputs that previously were not detected. Fixes
  7818. bug 23082; bugfix on 0.2.0.10-alpha.
  7819. o Minor bugfixes (onion service v3, client):
  7820. - Stop logging a "BUG()" warning and stacktrace when we find a SOCKS
  7821. connection waiting for a descriptor that we actually have in the
  7822. cache. It turns out that this can actually happen, though it is
  7823. rare. Now, tor will recover and retry the descriptor. Fixes bug
  7824. 28669; bugfix on 0.3.2.4-alpha.
  7825. o Minor bugfixes (periodic events):
  7826. - Refrain from calling routerlist_remove_old_routers() from
  7827. check_descriptor_callback(). Instead, create a new hourly periodic
  7828. event. Fixes bug 27929; bugfix on 0.2.8.1-alpha.
  7829. o Minor bugfixes (pluggable transports):
  7830. - Make sure that data is continously read from standard output and
  7831. standard error pipes of a pluggable transport child-process, to
  7832. avoid deadlocking when a pipe's buffer is full. Fixes bug 26360;
  7833. bugfix on 0.2.3.6-alpha.
  7834. o Minor bugfixes (unit tests):
  7835. - Instead of relying on hs_free_all() to clean up all onion service
  7836. objects in test_build_descriptors(), we now deallocate them one by
  7837. one. This lets Coverity know that we are not leaking memory there
  7838. and fixes CID 1442277. Fixes bug 28989; bugfix on 0.3.5.1-alpha.
  7839. o Minor bugfixes (usability):
  7840. - Stop saying "Your Guard ..." in pathbias_measure_{use,close}_rate().
  7841. Some users took this phrasing to mean that the mentioned guard was
  7842. under their control or responsibility, which it is not. Fixes bug
  7843. 28895; bugfix on Tor 0.3.0.1-alpha.
  7844. o Code simplification and refactoring:
  7845. - Reimplement NETINFO cell parsing and generation to rely on
  7846. trunnel-generated wire format handling code. Closes ticket 27325.
  7847. - Remove unnecessary unsafe code from the Rust macro "cstr!". Closes
  7848. ticket 28077.
  7849. - Rework SOCKS wire format handling to rely on trunnel-generated
  7850. parsing/generation code. Resolves ticket 27620.
  7851. - Split out bootstrap progress reporting from control.c into a
  7852. separate file. Part of ticket 27402.
  7853. - The .may_include files that we use to describe our directory-by-
  7854. directory dependency structure now describe a noncircular
  7855. dependency graph over the directories that they cover. Our
  7856. checkIncludes.py tool now enforces this noncircularity. Closes
  7857. ticket 28362.
  7858. o Documentation:
  7859. - Mention that you cannot add a new onion service if Tor is already
  7860. running with Sandbox enabled. Closes ticket 28560.
  7861. - Improve ControlPort documentation. Mention that it accepts
  7862. address:port pairs, and can be used multiple times. Closes
  7863. ticket 28805.
  7864. - Document the exact output of "tor --version". Closes ticket 28889.
  7865. o Removed features:
  7866. - Stop responding to the 'GETINFO status/version/num-concurring' and
  7867. 'GETINFO status/version/num-versioning' control port commands, as
  7868. those were deprecated back in 0.2.0.30. Also stop listing them in
  7869. output of 'GETINFO info/names'. Resolves ticket 28757.
  7870. - The scripts used to generate and maintain the list of fallback
  7871. directories have been extracted into a new "fallback-scripts"
  7872. repository. Closes ticket 27914.
  7873. o Testing:
  7874. - Run shellcheck for scripts in the in scripts/ directory. Closes
  7875. ticket 28058.
  7876. - Add unit tests for tokenize_string() and get_next_token()
  7877. functions. Resolves ticket 27625.
  7878. o Code simplification and refactoring (onion service v3):
  7879. - Consolidate the authorized client descriptor cookie computation
  7880. code from client and service into one function. Closes
  7881. ticket 27549.
  7882. o Code simplification and refactoring (shell scripts):
  7883. - Cleanup scan-build.sh to silence shellcheck warnings. Closes
  7884. ticket 28007.
  7885. - Fix issues that shellcheck found in chutney-git-bisect.sh.
  7886. Resolves ticket 28006.
  7887. - Fix issues that shellcheck found in updateRustDependencies.sh.
  7888. Resolves ticket 28012.
  7889. - Fix shellcheck warnings in cov-diff script. Resolves issue 28009.
  7890. - Fix shellcheck warnings in run_calltool.sh. Resolves ticket 28011.
  7891. - Fix shellcheck warnings in run_trunnel.sh. Resolves issue 28010.
  7892. - Fix shellcheck warnings in scripts/test/coverage. Resolves
  7893. issue 28008.
  7894. Changes in version 0.3.3.11 - 2019-01-07
  7895. Tor 0.3.3.11 backports numerous fixes from later versions of Tor.
  7896. numerous fixes, including an important fix for anyone using OpenSSL
  7897. 1.1.1. Anyone running an earlier version of Tor 0.3.3 should upgrade
  7898. to this version, or to a later series.
  7899. As a reminder, support the Tor 0.3.3 series will end on 22 Feb 2019.
  7900. We anticipate that this will be the last release of Tor 0.3.3, unless
  7901. some major bug is before then. Some time between now and then, users
  7902. should switch to either the Tor 0.3.4 series (supported until at least
  7903. 10 June 2019), or the Tor 0.3.5 series, which will receive long-term
  7904. support until at least 1 Feb 2022.
  7905. o Major bugfixes (OpenSSL, portability, backport from 0.3.5.5-alpha):
  7906. - Fix our usage of named groups when running as a TLS 1.3 client in
  7907. OpenSSL 1.1.1. Previously, we only initialized EC groups when
  7908. running as a relay, which caused clients to fail to negotiate TLS
  7909. 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3
  7910. support was added).
  7911. o Major bugfixes (restart-in-process, backport from 0.3.5.1-alpha):
  7912. - Fix a use-after-free error that could be caused by passing Tor an
  7913. impossible set of options that would fail during options_act().
  7914. Fixes bug 27708; bugfix on 0.3.3.1-alpha.
  7915. o Minor features (continuous integration, backport from 0.3.5.1-alpha):
  7916. - Only run one online rust build in Travis, to reduce network
  7917. errors. Skip offline rust builds on Travis for Linux gcc, because
  7918. they're redundant. Implements ticket 27252.
  7919. - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a
  7920. duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on
  7921. Linux with default settings, because all the non-default builds
  7922. use gcc on Linux. Implements ticket 27252.
  7923. o Minor features (continuous integration, backport from 0.3.5.3-alpha):
  7924. - Use the Travis Homebrew addon to install packages on macOS during
  7925. Travis CI. The package list is the same, but the Homebrew addon
  7926. does not do a `brew update` by default. Implements ticket 27738.
  7927. o Minor features (fallback directory list, backport from 0.3.5.6-rc):
  7928. - Replace the 150 fallbacks originally introduced in Tor
  7929. 0.3.3.1-alpha in January 2018 (of which ~115 were still
  7930. functional), with a list of 157 fallbacks (92 new, 65 existing, 85
  7931. removed) generated in December 2018. Closes ticket 24803.
  7932. o Minor features (geoip):
  7933. - Update geoip and geoip6 to the January 3 2019 Maxmind GeoLite2
  7934. Country database. Closes ticket 29012.
  7935. o Minor features (OpenSSL bug workaround, backport from 0.3.5.7):
  7936. - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3
  7937. key export function from handling long labels. When this bug is
  7938. detected, Tor will disable TLS 1.3. We recommend upgrading to a
  7939. version of OpenSSL without this bug when it becomes available.
  7940. Closes ticket 28973.
  7941. o Minor bugfixes (relay statistics, backport from 0.3.5.7):
  7942. - Update relay descriptor on bandwidth changes only when the uptime
  7943. is smaller than 24h, in order to reduce the efficiency of guard
  7944. discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha.
  7945. o Minor bugfixes (C correctness, backport from 0.3.5.4-alpha):
  7946. - Avoid undefined behavior in an end-of-string check when parsing
  7947. the BEGIN line in a directory object. Fixes bug 28202; bugfix
  7948. on 0.2.0.3-alpha.
  7949. o Minor bugfixes (code safety, backport from 0.3.5.3-alpha):
  7950. - Rewrite our assertion macros so that they no longer suppress the
  7951. compiler's -Wparentheses warnings. Fixes bug 27709; bugfix
  7952. o Minor bugfixes (compilation, backport from 0.3.5.5-alpha):
  7953. - Initialize a variable unconditionally in aes_new_cipher(), since
  7954. some compilers cannot tell that we always initialize it before
  7955. use. Fixes bug 28413; bugfix on 0.2.9.3-alpha.
  7956. o Minor bugfixes (directory authority, backport from 0.3.5.4-alpha):
  7957. - Log additional info when we get a relay that shares an ed25519 ID
  7958. with a different relay, instead making a BUG() warning. Fixes bug
  7959. 27800; bugfix on 0.3.2.1-alpha.
  7960. o Minor bugfixes (directory permissions, backport form 0.3.5.3-alpha):
  7961. - When a user requests a group-readable DataDirectory, give it to
  7962. them. Previously, when the DataDirectory and the CacheDirectory
  7963. were the same, the default setting (0) for
  7964. CacheDirectoryGroupReadable would override the setting for
  7965. DataDirectoryGroupReadable. Fixes bug 26913; bugfix
  7966. on 0.3.3.1-alpha.
  7967. o Minor bugfixes (onion service v3, backport from 0.3.5.1-alpha):
  7968. - When the onion service directory can't be created or has the wrong
  7969. permissions, do not log a stack trace. Fixes bug 27335; bugfix
  7970. on 0.3.2.1-alpha.
  7971. o Minor bugfixes (onion service v3, backport from 0.3.5.2-alpha):
  7972. - Close all SOCKS request (for the same .onion) if the newly fetched
  7973. descriptor is unusable. Before that, we would close only the first
  7974. one leaving the other hanging and let to time out by themselves.
  7975. Fixes bug 27410; bugfix on 0.3.2.1-alpha.
  7976. o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha):
  7977. - Don't warn so loudly when Tor is unable to decode an onion
  7978. descriptor. This can now happen as a normal use case if a client
  7979. gets a descriptor with client authorization but the client is not
  7980. authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha.
  7981. o Minor bugfixes (onion service v3, backport from 0.3.5.6-rc):
  7982. - When deleting an ephemeral onion service (DEL_ONION), do not close
  7983. any rendezvous circuits in order to let the existing client
  7984. connections finish by themselves or closed by the application. The
  7985. HS v2 is doing that already so now we have the same behavior for
  7986. all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha.
  7987. o Minor bugfixes (HTTP tunnel):
  7988. - Fix a bug warning when closing an HTTP tunnel connection due to
  7989. an HTTP request we couldn't handle. Fixes bug 26470; bugfix on
  7990. 0.3.2.1-alpha.
  7991. o Minor bugfixes (memory leaks, backport from 0.3.5.5-alpha):
  7992. - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419;
  7993. bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger.
  7994. o Minor bugfixes (netflow padding, backport from 0.3.5.1-alpha):
  7995. - Ensure circuitmux queues are empty before scheduling or sending
  7996. padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha.
  7997. o Minor bugfixes (protover, backport from 0.3.5.3-alpha):
  7998. - Reject protocol names containing bytes other than alphanumeric
  7999. characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix
  8000. on 0.2.9.4-alpha.
  8001. o Minor bugfixes (rust, backport from 0.3.5.1-alpha):
  8002. - Compute protover votes correctly in the rust version of the
  8003. protover code. Previously, the protover rewrite in 24031 allowed
  8004. repeated votes from the same voter for the same protocol version
  8005. to be counted multiple times in protover_compute_vote(). Fixes bug
  8006. 27649; bugfix on 0.3.3.5-rc.
  8007. - Reject protover names that contain invalid characters. Fixes bug
  8008. 27687; bugfix on 0.3.3.1-alpha.
  8009. o Minor bugfixes (rust, backport from 0.3.5.2-alpha):
  8010. - protover_all_supported() would attempt to allocate up to 16GB on
  8011. some inputs, leading to a potential memory DoS. Fixes bug 27206;
  8012. bugfix on 0.3.3.5-rc.
  8013. o Minor bugfixes (rust, backport from 0.3.5.4-alpha):
  8014. - Fix a potential null dereference in protover_all_supported(). Add
  8015. a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha.
  8016. - Return a string that can be safely freed by C code, not one
  8017. created by the rust allocator, in protover_all_supported(). Fixes
  8018. bug 27740; bugfix on 0.3.3.1-alpha.
  8019. - Fix an API mismatch in the rust implementation of
  8020. protover_compute_vote(). This bug could have caused crashes on any
  8021. directory authorities running Tor with Rust (which we do not yet
  8022. recommend). Fixes bug 27741; bugfix on 0.3.3.6.
  8023. o Minor bugfixes (testing, backport from 0.3.5.1-alpha):
  8024. - If a unit test running in a subprocess exits abnormally or with a
  8025. nonzero status code, treat the test as having failed, even if the
  8026. test reported success. Without this fix, memory leaks don't cause
  8027. the tests to fail, even with LeakSanitizer. Fixes bug 27658;
  8028. bugfix on 0.2.2.4-alpha.
  8029. o Minor bugfixes (testing, backport from 0.3.5.4-alpha):
  8030. - Treat backtrace test failures as expected on BSD-derived systems
  8031. (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808.
  8032. (FreeBSD failures have been treated as expected since 18204 in
  8033. 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha.
  8034. o Minor bugfixes (unit tests, guard selection, backport from 0.3.5.6-rc):
  8035. - Stop leaking memory in an entry guard unit test. Fixes bug 28554;
  8036. bugfix on 0.3.0.1-alpha.
  8037. Changes in version 0.3.4.10 - 2019-01-07
  8038. Tor 0.3.4.9 is the second stable release in its series; it backports
  8039. numerous fixes, including an important fix for relays, and for anyone
  8040. using OpenSSL 1.1.1. Anyone running an earlier version of Tor 0.3.4
  8041. should upgrade.
  8042. As a reminder, the Tor 0.3.4 series will be supported until 10 June
  8043. 2019. Some time between now and then, users should switch to the Tor
  8044. 0.3.5 series, which will receive long-term support until at least 1
  8045. Feb 2022.
  8046. o Major bugfixes (OpenSSL, portability, backport from 0.3.5.5-alpha):
  8047. - Fix our usage of named groups when running as a TLS 1.3 client in
  8048. OpenSSL 1.1.1. Previously, we only initialized EC groups when
  8049. running as a relay, which caused clients to fail to negotiate TLS
  8050. 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3
  8051. support was added).
  8052. o Major bugfixes (relay, directory, backport from 0.3.5.7):
  8053. - Always reactivate linked connections in the main loop so long as
  8054. any linked connection has been active. Previously, connections
  8055. serving directory information wouldn't get reactivated after the
  8056. first chunk of data was sent (usually 32KB), which would prevent
  8057. clients from bootstrapping. Fixes bug 28912; bugfix on
  8058. 0.3.4.1-alpha. Patch by "cypherpunks3".
  8059. o Minor features (continuous integration, Windows, backport from 0.3.5.6-rc):
  8060. - Always show the configure and test logs, and upload them as build
  8061. artifacts, when building for Windows using Appveyor CI.
  8062. Implements 28459.
  8063. o Minor features (controller, backport from 0.3.5.1-alpha):
  8064. - For purposes of CIRC_BW-based dropped cell detection, track half-
  8065. closed stream ids, and allow their ENDs, SENDMEs, DATA and path
  8066. bias check cells to arrive without counting it as dropped until
  8067. either the END arrives, or the windows are empty. Closes
  8068. ticket 25573.
  8069. o Minor features (fallback directory list, backport from 0.3.5.6-rc):
  8070. - Replace the 150 fallbacks originally introduced in Tor
  8071. 0.3.3.1-alpha in January 2018 (of which ~115 were still
  8072. functional), with a list of 157 fallbacks (92 new, 65 existing, 85
  8073. removed) generated in December 2018. Closes ticket 24803.
  8074. o Minor features (geoip):
  8075. - Update geoip and geoip6 to the November 6 2018 Maxmind GeoLite2
  8076. Country database. Closes ticket 28395.
  8077. o Minor features (OpenSSL bug workaround, backport from 0.3.5.7):
  8078. - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3
  8079. key export function from handling long labels. When this bug is
  8080. detected, Tor will disable TLS 1.3. We recommend upgrading to a
  8081. version of OpenSSL without this bug when it becomes available.
  8082. Closes ticket 28973.
  8083. o Minor bugfixes (compilation, backport from 0.3.5.5-alpha):
  8084. - Initialize a variable unconditionally in aes_new_cipher(), since
  8085. some compilers cannot tell that we always initialize it before
  8086. use. Fixes bug 28413; bugfix on 0.2.9.3-alpha.
  8087. o Minor bugfixes (connection, relay, backport from 0.3.5.5-alpha):
  8088. - Avoid a logging a BUG() stacktrace when closing connection held
  8089. open because the write side is rate limited but not the read side.
  8090. Now, the connection read side is simply shut down until Tor is
  8091. able to flush the connection and close it. Fixes bug 27750; bugfix
  8092. on 0.3.4.1-alpha.
  8093. o Minor bugfixes (continuous integration, Windows, backport from 0.3.5.5-alpha):
  8094. - Manually configure the zstd compiler options, when building using
  8095. mingw on Appveyor Windows CI. The MSYS2 mingw zstd package does
  8096. not come with a pkg-config file. Fixes bug 28454; bugfix
  8097. on 0.3.4.1-alpha.
  8098. - Stop using an external OpenSSL install, and stop installing MSYS2
  8099. packages, when building using mingw on Appveyor Windows CI. Fixes
  8100. bug 28399; bugfix on 0.3.4.1-alpha.
  8101. o Minor bugfixes (continuous integration, Windows, backport from 0.3.5.6-rc):
  8102. - Explicitly specify the path to the OpenSSL library and do not
  8103. download OpenSSL from Pacman, but instead use the library that is
  8104. already provided by AppVeyor. Fixes bug 28574; bugfix on master.
  8105. o Minor bugfixes (directory permissions, backport form 0.3.5.3-alpha):
  8106. - When a user requests a group-readable DataDirectory, give it to
  8107. them. Previously, when the DataDirectory and the CacheDirectory
  8108. were the same, the default setting (0) for
  8109. CacheDirectoryGroupReadable would override the setting for
  8110. DataDirectoryGroupReadable. Fixes bug 26913; bugfix
  8111. on 0.3.3.1-alpha.
  8112. o Minor bugfixes (memory leaks, backport from 0.3.5.5-alpha):
  8113. - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419;
  8114. bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger.
  8115. o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha):
  8116. - Don't warn so loudly when Tor is unable to decode an onion
  8117. descriptor. This can now happen as a normal use case if a client
  8118. gets a descriptor with client authorization but the client is not
  8119. authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha.
  8120. o Minor bugfixes (onion service v3, backport from 0.3.5.6-rc):
  8121. - When deleting an ephemeral onion service (DEL_ONION), do not close
  8122. any rendezvous circuits in order to let the existing client
  8123. connections finish by themselves or closed by the application. The
  8124. HS v2 is doing that already so now we have the same behavior for
  8125. all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha.
  8126. o Minor bugfixes (relay statistics, backport from 0.3.5.7):
  8127. - Update relay descriptor on bandwidth changes only when the uptime
  8128. is smaller than 24h, in order to reduce the efficiency of guard
  8129. discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha.
  8130. o Minor bugfixes (unit tests, guard selection, backport from 0.3.5.6-rc):
  8131. - Stop leaking memory in an entry guard unit test. Fixes bug 28554;
  8132. bugfix on 0.3.0.1-alpha.
  8133. Changes in version 0.3.5.7 - 2019-01-07
  8134. Tor 0.3.5.7 is the first stable release in its series; it includes
  8135. compilation and portability fixes, and a fix for a severe problem
  8136. affecting directory caches.
  8137. The Tor 0.3.5 series includes several new features and performance
  8138. improvements, including client authorization for v3 onion services,
  8139. cleanups to bootstrap reporting, support for improved bandwidth-
  8140. measurement tools, experimental support for NSS in place of OpenSSL,
  8141. and much more. It also begins a full reorganization of Tor's code
  8142. layout, for improved modularity and maintainability in the future.
  8143. Finally, there is the usual set of performance improvements and
  8144. bugfixes that we try to do in every release series.
  8145. There are a couple of changes in the 0.3.5 that may affect
  8146. compatibility. First, the default version for newly created onion
  8147. services is now v3. Use the HiddenServiceVersion option if you want to
  8148. override this. Second, some log messages related to bootstrapping have
  8149. changed; if you use stem, you may need to update to the latest version
  8150. so it will recognize them.
  8151. We have designated 0.3.5 as a "long-term support" (LTS) series: we
  8152. will continue to patch major bugs in typical configurations of 0.3.5
  8153. until at least 1 Feb 2022. (We do not plan to provide long-term
  8154. support for embedding, Rust support, NSS support, running a directory
  8155. authority, or unsupported platforms. For these, you will need to stick
  8156. with the latest stable release.)
  8157. Below are the changes since 0.3.5.6-rc. For a complete list of changes
  8158. since 0.3.4.9, see the ReleaseNotes file.
  8159. o Major bugfixes (relay, directory):
  8160. - Always reactivate linked connections in the main loop so long as
  8161. any linked connection has been active. Previously, connections
  8162. serving directory information wouldn't get reactivated after the
  8163. first chunk of data was sent (usually 32KB), which would prevent
  8164. clients from bootstrapping. Fixes bug 28912; bugfix on
  8165. 0.3.4.1-alpha. Patch by "cypherpunks3".
  8166. o Minor features (compilation):
  8167. - When possible, place our warning flags in a separate file, to
  8168. avoid flooding verbose build logs. Closes ticket 28924.
  8169. o Minor features (geoip):
  8170. - Update geoip and geoip6 to the January 3 2019 Maxmind GeoLite2
  8171. Country database. Closes ticket 29012.
  8172. o Minor features (OpenSSL bug workaround):
  8173. - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3
  8174. key export function from handling long labels. When this bug is
  8175. detected, Tor will disable TLS 1.3. We recommend upgrading to a
  8176. version of OpenSSL without this bug when it becomes available.
  8177. Closes ticket 28973.
  8178. o Minor features (performance):
  8179. - Remove about 96% of the work from the function that we run at
  8180. startup to test our curve25519_basepoint implementation. Since
  8181. this function has yet to find an actual failure, we now only run
  8182. it for 8 iterations instead of 200. Based on our profile
  8183. information, this change should save around 8% of our startup time
  8184. on typical desktops, and may have a similar effect on other
  8185. platforms. Closes ticket 28838.
  8186. - Stop re-validating our hardcoded Diffie-Hellman parameters on
  8187. every startup. Doing this wasted time and cycles, especially on
  8188. low-powered devices. Closes ticket 28851.
  8189. o Minor bugfixes (compilation):
  8190. - Fix compilation for Android by adding a missing header to
  8191. freespace.c. Fixes bug 28974; bugfix on 0.3.5.1-alpha.
  8192. o Minor bugfixes (correctness):
  8193. - Fix an unreached code path where we checked the value of
  8194. "hostname" inside send_resolved_hostname_cell(). Previously, we
  8195. used it before checking it; now we check it first. Fixes bug
  8196. 28879; bugfix on 0.1.2.7-alpha.
  8197. o Minor bugfixes (testing):
  8198. - Make sure that test_rebind.py actually obeys its timeout, even
  8199. when it receives a large number of log messages. Fixes bug 28883;
  8200. bugfix on 0.3.5.4-alpha.
  8201. - Stop running stem's unit tests as part of "make test-stem", but
  8202. continue to run stem's unit and online tests during "make test-
  8203. stem-full". Fixes bug 28568; bugfix on 0.2.6.3-alpha.
  8204. o Minor bugfixes (windows services):
  8205. - Make Tor start correctly as an NT service again: previously it was
  8206. broken by refactoring. Fixes bug 28612; bugfix on 0.3.5.3-alpha.
  8207. o Code simplification and refactoring:
  8208. - When parsing a port configuration, make it more obvious to static
  8209. analyzer tools that we always initialize the address. Closes
  8210. ticket 28881.
  8211. Changes in version 0.3.5.6-rc - 2018-12-18
  8212. Tor 0.3.5.6-rc fixes numerous small bugs in earlier versions of Tor.
  8213. It is the first release candidate in the 0.3.5.x series; if no further
  8214. huge bugs are found, our next release may be the stable 0.3.5.x.
  8215. o Minor features (continuous integration, Windows):
  8216. - Always show the configure and test logs, and upload them as build
  8217. artifacts, when building for Windows using Appveyor CI.
  8218. Implements 28459.
  8219. o Minor features (fallback directory list):
  8220. - Replace the 150 fallbacks originally introduced in Tor
  8221. 0.3.3.1-alpha in January 2018 (of which ~115 were still
  8222. functional), with a list of 157 fallbacks (92 new, 65 existing, 85
  8223. removed) generated in December 2018. Closes ticket 24803.
  8224. o Minor features (geoip):
  8225. - Update geoip and geoip6 to the December 5 2018 Maxmind GeoLite2
  8226. Country database. Closes ticket 28744.
  8227. o Minor bugfixes (compilation):
  8228. - Add missing dependency on libgdi32.dll for tor-print-ed-signing-
  8229. cert.exe on Windows. Fixes bug 28485; bugfix on 0.3.5.1-alpha.
  8230. o Minor bugfixes (continuous integration, Windows):
  8231. - Explicitly specify the path to the OpenSSL library and do not
  8232. download OpenSSL from Pacman, but instead use the library that is
  8233. already provided by AppVeyor. Fixes bug 28574; bugfix on master.
  8234. o Minor bugfixes (onion service v3):
  8235. - When deleting an ephemeral onion service (DEL_ONION), do not close
  8236. any rendezvous circuits in order to let the existing client
  8237. connections finish by themselves or closed by the application. The
  8238. HS v2 is doing that already so now we have the same behavior for
  8239. all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha.
  8240. o Minor bugfixes (restart-in-process, boostrap):
  8241. - Add missing resets of bootstrap tracking state when shutting down
  8242. (regression caused by ticket 27169). Fixes bug 28524; bugfix
  8243. on 0.3.5.1-alpha.
  8244. o Minor bugfixes (testing):
  8245. - Use a separate DataDirectory for the test_rebind script.
  8246. Previously, this script would run using the default DataDirectory,
  8247. and sometimes fail. Fixes bug 28562; bugfix on 0.3.5.1-alpha.
  8248. Patch from Taylor R Campbell.
  8249. - Stop leaking memory in an entry guard unit test. Fixes bug 28554;
  8250. bugfix on 0.3.0.1-alpha.
  8251. o Minor bugfixes (Windows):
  8252. - Correctly identify Windows 8.1, Windows 10, and Windows Server
  8253. 2008 and later from their NT versions. Fixes bug 28096; bugfix on
  8254. 0.2.2.34; reported by Keifer Bly.
  8255. - On recent Windows versions, the GetVersionEx() function may report
  8256. an earlier Windows version than the running OS. To avoid user
  8257. confusion, add "[or later]" to Tor's version string on affected
  8258. versions of Windows. Fixes bug 28096; bugfix on 0.2.2.34; reported
  8259. by Keifer Bly.
  8260. - Remove Windows versions that were never supported by the
  8261. GetVersionEx() function. Stop duplicating the latest Windows
  8262. version in get_uname(). Fixes bug 28096; bugfix on 0.2.2.34;
  8263. reported by Keifer Bly.
  8264. o Testing:
  8265. - Increase logging and tag all log entries with timestamps in
  8266. test_rebind.py. Provides diagnostics for issue 28229.
  8267. o Code simplification and refactoring (shared random, dirauth):
  8268. - Change many tor_assert() to use BUG() instead. The idea is to not
  8269. crash a dirauth but rather scream loudly with a stacktrace and let
  8270. it continue run. The shared random subsystem is very resilient and
  8271. if anything wrong happens with it, at worst a non coherent value
  8272. will be put in the vote and discarded by the other authorities.
  8273. Closes ticket 19566.
  8274. o Documentation (onion services):
  8275. - Document in the man page that changing ClientOnionAuthDir value or
  8276. adding a new file in the directory will not work at runtime upon
  8277. sending a HUP if Sandbox 1. Closes ticket 28128.
  8278. - Note in the man page that the only real way to fully revoke an
  8279. onion service v3 client authorization is by restarting the tor
  8280. process. Closes ticket 28275.
  8281. Changes in version 0.3.5.5-alpha - 2018-11-16
  8282. Tor 0.3.5.5-alpha includes numerous bugfixes on earlier releases,
  8283. including several that we hope to backport to older release series in
  8284. the future.
  8285. o Major bugfixes (OpenSSL, portability):
  8286. - Fix our usage of named groups when running as a TLS 1.3 client in
  8287. OpenSSL 1.1.1. Previously, we only initialized EC groups when
  8288. running as a relay, which caused clients to fail to negotiate TLS
  8289. 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3
  8290. support was added).
  8291. o Minor features (geoip):
  8292. - Update geoip and geoip6 to the November 6 2018 Maxmind GeoLite2
  8293. Country database. Closes ticket 28395.
  8294. o Minor bugfixes (compilation):
  8295. - Initialize a variable unconditionally in aes_new_cipher(), since
  8296. some compilers cannot tell that we always initialize it before
  8297. use. Fixes bug 28413; bugfix on 0.2.9.3-alpha.
  8298. o Minor bugfixes (connection, relay):
  8299. - Avoid a logging a BUG() stacktrace when closing connection held
  8300. open because the write side is rate limited but not the read side.
  8301. Now, the connection read side is simply shut down until Tor is
  8302. able to flush the connection and close it. Fixes bug 27750; bugfix
  8303. on 0.3.4.1-alpha.
  8304. o Minor bugfixes (continuous integration, Windows):
  8305. - Manually configure the zstd compiler options, when building using
  8306. mingw on Appveyor Windows CI. The MSYS2 mingw zstd package does
  8307. not come with a pkg-config file. Fixes bug 28454; bugfix
  8308. on 0.3.4.1-alpha.
  8309. - Stop using an external OpenSSL install, and stop installing MSYS2
  8310. packages, when building using mingw on Appveyor Windows CI. Fixes
  8311. bug 28399; bugfix on 0.3.4.1-alpha.
  8312. o Minor bugfixes (documentation):
  8313. - Make Doxygen work again after the code movement in the 0.3.5
  8314. source tree. Fixes bug 28435; bugfix on 0.3.5.1-alpha.
  8315. o Minor bugfixes (Linux seccomp2 sandbox):
  8316. - Permit the "shutdown()" system call, which is apparently used by
  8317. OpenSSL under some circumstances. Fixes bug 28183; bugfix
  8318. on 0.2.5.1-alpha.
  8319. o Minor bugfixes (logging):
  8320. - Stop talking about the Named flag in log messages. Clients have
  8321. ignored the Named flag since 0.3.2. Fixes bug 28441; bugfix
  8322. on 0.3.2.1-alpha.
  8323. o Minor bugfixes (memory leaks):
  8324. - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419;
  8325. bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger.
  8326. o Minor bugfixes (onion services):
  8327. - On an intro point for a version 3 onion service, stop closing
  8328. introduction circuits on an NACK. This lets the client decide
  8329. whether to reuse the circuit or discard it. Previously, we closed
  8330. intro circuits when sending NACKs. Fixes bug 27841; bugfix on
  8331. 0.3.2.1-alpha. Patch by Neel Chaunan.
  8332. - When replacing a descriptor in the client cache, make sure to
  8333. close all client introduction circuits for the old descriptor, so
  8334. we don't end up with unusable leftover circuits. Fixes bug 27471;
  8335. bugfix on 0.3.2.1-alpha.
  8336. Changes in version 0.3.5.4-alpha - 2018-11-08
  8337. Tor 0.3.5.4-alpha includes numerous bugfixes on earlier versions and
  8338. improves our continuous integration support. It continues our attempts
  8339. to stabilize this alpha branch and build it into a foundation for an
  8340. acceptable long-term-support release.
  8341. o Major bugfixes (compilation, rust):
  8342. - Rust tests can now build and run successfully with the
  8343. --enable-fragile-hardening option enabled. Doing this currently
  8344. requires the rust beta channel; it will be possible with stable
  8345. rust once Rust version 1.31 is released. Patch from Alex Crichton.
  8346. Fixes bugs 27272, 27273, and 27274. Bugfix on 0.3.1.1-alpha.
  8347. o Major bugfixes (embedding, main loop):
  8348. - When DisableNetwork becomes set, actually disable periodic events
  8349. that are already enabled. (Previously, we would refrain from
  8350. enabling new ones, but we would leave the old ones turned on.)
  8351. Fixes bug 28348; bugfix on 0.3.4.1-alpha.
  8352. o Minor features (continuous integration):
  8353. - Add a Travis CI build for --enable-nss on Linux gcc. Closes
  8354. ticket 27751.
  8355. - Add new CI job to Travis configuration to run stem-based
  8356. integration tests. Closes ticket 27913.
  8357. o Minor features (Windows, continuous integration):
  8358. - Build tor on Windows Server 2012 R2 and Windows Server 2016 using
  8359. Appveyor's CI. Closes ticket 28318.
  8360. o Minor bugfixes (C correctness, also in 0.3.4.9):
  8361. - Avoid undefined behavior in an end-of-string check when parsing
  8362. the BEGIN line in a directory object. Fixes bug 28202; bugfix
  8363. on 0.2.0.3-alpha.
  8364. o Minor bugfixes (compilation):
  8365. - Fix a pair of missing headers on OpenBSD. Fixes bug 28303; bugfix
  8366. on 0.3.5.1-alpha. Patch from Kris Katterjohn.
  8367. o Minor bugfixes (compilation, OpenSolaris):
  8368. - Fix compilation on OpenSolaris and its descendants by adding a
  8369. missing include to compat_pthreads.c. Fixes bug 27963; bugfix
  8370. on 0.3.5.1-alpha.
  8371. o Minor bugfixes (configuration):
  8372. - Refuse to start with relative file paths and RunAsDaemon set
  8373. (regression from the fix for bug 22731). Fixes bug 28298; bugfix
  8374. on 0.3.3.1-alpha.
  8375. o Minor bugfixes (directory authority, also in 0.3.4.9):
  8376. - Log additional info when we get a relay that shares an ed25519 ID
  8377. with a different relay, instead of a BUG() warning with a
  8378. backtrace. Fixes bug 27800; bugfix on 0.3.2.1-alpha.
  8379. o Minor bugfixes (onion service v3):
  8380. - Build the service descriptor's signing key certificate before
  8381. uploading, so we always have a fresh one: leaving no chances for
  8382. it to expire service side. Fixes bug 27838; bugfix
  8383. on 0.3.2.1-alpha.
  8384. o Minor bugfixes (onion service v3, client authorization):
  8385. - Fix an assert() when adding a client authorization for the first
  8386. time and then sending a HUP signal to the service. Before that,
  8387. Tor would stop abruptly. Fixes bug 27995; bugfix on 0.3.5.1-alpha.
  8388. o Minor bugfixes (onion services):
  8389. - Unless we have explicitly set HiddenServiceVersion, detect the
  8390. onion service version and then look for invalid options.
  8391. Previously, we did the reverse, but that broke existing configs
  8392. which were pointed to a v2 service and had options like
  8393. HiddenServiceAuthorizeClient set. Fixes bug 28127; bugfix on
  8394. 0.3.5.1-alpha. Patch by Neel Chauhan.
  8395. o Minor bugfixes (portability):
  8396. - Make the OPE code (which is used for v3 onion services) run
  8397. correctly on big-endian platforms. Fixes bug 28115; bugfix
  8398. on 0.3.5.1-alpha.
  8399. o Minor bugfixes (protover, rust):
  8400. - Reject extra commas in version strings. Fixes bug 27197; bugfix
  8401. on 0.3.3.3-alpha.
  8402. o Minor bugfixes (relay shutdown, systemd):
  8403. - Notify systemd of ShutdownWaitLength so it can be set to longer
  8404. than systemd's TimeoutStopSec. In Tor's systemd service file, set
  8405. TimeoutSec to 60 seconds to allow Tor some time to shut down.
  8406. Fixes bug 28113; bugfix on 0.2.6.2-alpha.
  8407. o Minor bugfixes (rust, also in 0.3.4.9):
  8408. - Fix a potential null dereference in protover_all_supported(). Add
  8409. a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha.
  8410. - Return a string that can be safely freed by C code, not one
  8411. created by the rust allocator, in protover_all_supported(). Fixes
  8412. bug 27740; bugfix on 0.3.3.1-alpha.
  8413. o Minor bugfixes (rust, directory authority, also in 0.3.4.9):
  8414. - Fix an API mismatch in the rust implementation of
  8415. protover_compute_vote(). This bug could have caused crashes on any
  8416. directory authorities running Tor with Rust (which we do not yet
  8417. recommend). Fixes bug 27741; bugfix on 0.3.3.6.
  8418. o Minor bugfixes (testing):
  8419. - Avoid hangs and race conditions in test_rebind.py. Fixes bug
  8420. 27968; bugfix on 0.3.5.1-alpha.
  8421. o Minor bugfixes (testing, also in 0.3.4.9):
  8422. - Treat backtrace test failures as expected on BSD-derived systems
  8423. (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808.
  8424. (FreeBSD failures have been treated as expected since 18204 in
  8425. 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha.
  8426. o Documentation (onion service manpage):
  8427. - Improve HSv3 client authorization by making some options more
  8428. explicit and detailed. Closes ticket 28026. Patch by Mike Tigas.
  8429. Changes in version 0.3.4.9 - 2018-11-02
  8430. Tor 0.3.4.9 is the second stable release in its series; it backports
  8431. numerous fixes, including a fix for a bandwidth management bug that
  8432. was causing memory exhaustion on relays. Anyone running an earlier
  8433. version of Tor 0.3.4.9 should upgrade.
  8434. o Major bugfixes (compilation, backport from 0.3.5.3-alpha):
  8435. - Fix compilation on ARM (and other less-used CPUs) when compiling
  8436. with OpenSSL before 1.1. Fixes bug 27781; bugfix on 0.3.4.1-alpha.
  8437. o Major bugfixes (mainloop, bootstrap, backport from 0.3.5.3-alpha):
  8438. - Make sure Tor bootstraps and works properly if only the
  8439. ControlPort is set. Prior to this fix, Tor would only bootstrap
  8440. when a client port was set (Socks, Trans, NATD, DNS or HTTPTunnel
  8441. port). Fixes bug 27849; bugfix on 0.3.4.1-alpha.
  8442. o Major bugfixes (relay, backport from 0.3.5.3-alpha):
  8443. - When our write bandwidth limit is exhausted, stop writing on the
  8444. connection. Previously, we had a typo in the code that would make
  8445. us stop reading instead, leading to relay connections being stuck
  8446. indefinitely and consuming kernel RAM. Fixes bug 28089; bugfix
  8447. on 0.3.4.1-alpha.
  8448. o Major bugfixes (restart-in-process, backport from 0.3.5.1-alpha):
  8449. - Fix a use-after-free error that could be caused by passing Tor an
  8450. impossible set of options that would fail during options_act().
  8451. Fixes bug 27708; bugfix on 0.3.3.1-alpha.
  8452. o Minor features (continuous integration, backport from 0.3.5.1-alpha):
  8453. - Don't do a distcheck with --disable-module-dirauth in Travis.
  8454. Implements ticket 27252.
  8455. - Only run one online rust build in Travis, to reduce network
  8456. errors. Skip offline rust builds on Travis for Linux gcc, because
  8457. they're redundant. Implements ticket 27252.
  8458. - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a
  8459. duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on
  8460. Linux with default settings, because all the non-default builds
  8461. use gcc on Linux. Implements ticket 27252.
  8462. o Minor features (continuous integration, backport from 0.3.5.3-alpha):
  8463. - Use the Travis Homebrew addon to install packages on macOS during
  8464. Travis CI. The package list is the same, but the Homebrew addon
  8465. does not do a `brew update` by default. Implements ticket 27738.
  8466. o Minor features (geoip):
  8467. - Update geoip and geoip6 to the October 9 2018 Maxmind GeoLite2
  8468. Country database. Closes ticket 27991.
  8469. o Minor bugfixes (32-bit OSX and iOS, timing, backport from 0.3.5.2-alpha):
  8470. - Fix an integer overflow bug in our optimized 32-bit millisecond-
  8471. difference algorithm for 32-bit Apple platforms. Previously, it
  8472. would overflow when calculating the difference between two times
  8473. more than 47 days apart. Fixes part of bug 27139; bugfix
  8474. on 0.3.4.1-alpha.
  8475. - Improve the precision of our 32-bit millisecond difference
  8476. algorithm for 32-bit Apple platforms. Fixes part of bug 27139;
  8477. bugfix on 0.3.4.1-alpha.
  8478. - Relax the tolerance on the mainloop/update_time_jumps test when
  8479. running on 32-bit Apple platforms. Fixes part of bug 27139; bugfix
  8480. on 0.3.4.1-alpha.
  8481. o Minor bugfixes (C correctness, to appear in 0.3.5.4-alpha):
  8482. - Avoid undefined behavior in an end-of-string check when parsing
  8483. the BEGIN line in a directory object. Fixes bug 28202; bugfix
  8484. on 0.2.0.3-alpha.
  8485. o Minor bugfixes (CI, appveyor, to appear in 0.3.5.4-alpha):
  8486. - Only install the necessary mingw packages during our appveyor
  8487. builds. This change makes the build a little faster, and prevents
  8488. a conflict with a preinstalled mingw openssl that appveyor now
  8489. ships. Fixes bugs 27943 and 27765; bugfix on 0.3.4.2-alpha.
  8490. o Minor bugfixes (code safety, backport from 0.3.5.3-alpha):
  8491. - Rewrite our assertion macros so that they no longer suppress the
  8492. compiler's -Wparentheses warnings. Fixes bug 27709; bugfix
  8493. o Minor bugfixes (continuous integration, backport from 0.3.5.1-alpha):
  8494. - Stop reinstalling identical packages in our Windows CI. Fixes bug
  8495. 27464; bugfix on 0.3.4.1-alpha.
  8496. o Minor bugfixes (directory authority, to appear in 0.3.5.4-alpha):
  8497. - Log additional info when we get a relay that shares an ed25519 ID
  8498. with a different relay, instead making a BUG() warning. Fixes bug
  8499. 27800; bugfix on 0.3.2.1-alpha.
  8500. o Minor bugfixes (directory connection shutdown, backport from 0.3.5.1-alpha):
  8501. - Avoid a double-close when shutting down a stalled directory
  8502. connection. Fixes bug 26896; bugfix on 0.3.4.1-alpha.
  8503. o Minor bugfixes (HTTP tunnel, backport from 0.3.5.1-alpha):
  8504. - Fix a bug warning when closing an HTTP tunnel connection due to an
  8505. HTTP request we couldn't handle. Fixes bug 26470; bugfix
  8506. on 0.3.2.1-alpha.
  8507. o Minor bugfixes (netflow padding, backport from 0.3.5.1-alpha):
  8508. - Ensure circuitmux queues are empty before scheduling or sending
  8509. padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha.
  8510. o Minor bugfixes (onion service v3, backport from 0.3.5.1-alpha):
  8511. - When the onion service directory can't be created or has the wrong
  8512. permissions, do not log a stack trace. Fixes bug 27335; bugfix
  8513. on 0.3.2.1-alpha.
  8514. o Minor bugfixes (onion service v3, backport from 0.3.5.2-alpha):
  8515. - Close all SOCKS request (for the same .onion) if the newly fetched
  8516. descriptor is unusable. Before that, we would close only the first
  8517. one leaving the other hanging and let to time out by themselves.
  8518. Fixes bug 27410; bugfix on 0.3.2.1-alpha.
  8519. o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha):
  8520. - When selecting a v3 rendezvous point, don't only look at the
  8521. protover, but also check whether the curve25519 onion key is
  8522. present. This way we avoid picking a relay that supports the v3
  8523. rendezvous but for which we don't have the microdescriptor. Fixes
  8524. bug 27797; bugfix on 0.3.2.1-alpha.
  8525. o Minor bugfixes (protover, backport from 0.3.5.3-alpha):
  8526. - Reject protocol names containing bytes other than alphanumeric
  8527. characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix
  8528. on 0.2.9.4-alpha.
  8529. o Minor bugfixes (rust, backport from 0.3.5.1-alpha):
  8530. - Compute protover votes correctly in the rust version of the
  8531. protover code. Previously, the protover rewrite in 24031 allowed
  8532. repeated votes from the same voter for the same protocol version
  8533. to be counted multiple times in protover_compute_vote(). Fixes bug
  8534. 27649; bugfix on 0.3.3.5-rc.
  8535. - Reject protover names that contain invalid characters. Fixes bug
  8536. 27687; bugfix on 0.3.3.1-alpha.
  8537. o Minor bugfixes (rust, backport from 0.3.5.2-alpha):
  8538. - protover_all_supported() would attempt to allocate up to 16GB on
  8539. some inputs, leading to a potential memory DoS. Fixes bug 27206;
  8540. bugfix on 0.3.3.5-rc.
  8541. o Minor bugfixes (rust, directory authority, to appear in 0.3.5.4-alpha):
  8542. - Fix an API mismatch in the rust implementation of
  8543. protover_compute_vote(). This bug could have caused crashes on any
  8544. directory authorities running Tor with Rust (which we do not yet
  8545. recommend). Fixes bug 27741; bugfix on 0.3.3.6.
  8546. o Minor bugfixes (rust, to appear in 0.3.5.4-alpha):
  8547. - Fix a potential null dereference in protover_all_supported(). Add
  8548. a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha.
  8549. - Return a string that can be safely freed by C code, not one
  8550. created by the rust allocator, in protover_all_supported(). Fixes
  8551. bug 27740; bugfix on 0.3.3.1-alpha.
  8552. o Minor bugfixes (testing, backport from 0.3.5.1-alpha):
  8553. - If a unit test running in a subprocess exits abnormally or with a
  8554. nonzero status code, treat the test as having failed, even if the
  8555. test reported success. Without this fix, memory leaks don't cause
  8556. the tests to fail, even with LeakSanitizer. Fixes bug 27658;
  8557. bugfix on 0.2.2.4-alpha.
  8558. o Minor bugfixes (testing, backport from 0.3.5.3-alpha):
  8559. - Make the hs_service tests use the same time source when creating
  8560. the introduction point and when testing it. Now tests work better
  8561. on very slow systems like ARM or Travis. Fixes bug 27810; bugfix
  8562. on 0.3.2.1-alpha.
  8563. o Minor bugfixes (testing, to appear in 0.3.5.4-alpha):
  8564. - Treat backtrace test failures as expected on BSD-derived systems
  8565. (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808.
  8566. (FreeBSD failures have been treated as expected since 18204 in
  8567. 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha.
  8568. Changes in version 0.3.5.3-alpha - 2018-10-17
  8569. Tor 0.3.5.3-alpha fixes several bugs, mostly from previous 0.3.5.x
  8570. versions. One important fix for relays addresses a problem with rate-
  8571. limiting code from back in 0.3.4.x: If the fix works out, we'll be
  8572. backporting it soon. This release is still an alpha, but we hope it's
  8573. getting closer and closer to stability.
  8574. o Major features (onion services):
  8575. - Version 3 onion services can now use the per-service
  8576. HiddenServiceExportCircuitID option to differentiate client
  8577. circuits. It communicates with the service by using the HAProxy
  8578. protocol to assign virtual IP addresses to inbound client
  8579. circuits. Closes ticket 4700. Patch by Mahrud Sayrafi.
  8580. o Major bugfixes (compilation):
  8581. - Fix compilation on ARM (and other less-used CPUs) when compiling
  8582. with OpenSSL before 1.1. Fixes bug 27781; bugfix on 0.3.4.1-alpha.
  8583. o Major bugfixes (initialization, crash):
  8584. - Fix an assertion crash that would stop Tor from starting up if it
  8585. tried to activate a periodic event too early. Fixes bug 27861;
  8586. bugfix on 0.3.5.1-alpha.
  8587. o Major bugfixes (mainloop, bootstrap):
  8588. - Make sure Tor bootstraps and works properly if only the
  8589. ControlPort is set. Prior to this fix, Tor would only bootstrap
  8590. when a client port was set (Socks, Trans, NATD, DNS or HTTPTunnel
  8591. port). Fixes bug 27849; bugfix on 0.3.4.1-alpha.
  8592. o Major bugfixes (relay):
  8593. - When our write bandwidth limit is exhausted, stop writing on the
  8594. connection. Previously, we had a typo in the code that would make
  8595. us stop reading instead, leading to relay connections being stuck
  8596. indefinitely and consuming kernel RAM. Fixes bug 28089; bugfix
  8597. on 0.3.4.1-alpha.
  8598. o Minor features (continuous integration):
  8599. - Use the Travis Homebrew addon to install packages on macOS during
  8600. Travis CI. The package list is the same, but the Homebrew addon
  8601. does not do a `brew update` by default. Implements ticket 27738.
  8602. - Report what program produced the mysterious core file that we
  8603. occasionally see on Travis CI during make distcheck. Closes
  8604. ticket 28024.
  8605. o Minor features (geoip):
  8606. - Update geoip and geoip6 to the October 9 2018 Maxmind GeoLite2
  8607. Country database. Closes ticket 27991.
  8608. o Minor bugfixes (code safety):
  8609. - Rewrite our assertion macros so that they no longer suppress the
  8610. compiler's -Wparentheses warnings. Fixes bug 27709; bugfix
  8611. on 0.0.6.
  8612. o Minor bugfixes (compilation):
  8613. - Compile the ed25519-donna code with a correct declaration of
  8614. crypto_strongest_rand(). Previously, we built it with one type,
  8615. but linked it against another in the unit tests, which caused
  8616. compilation failures with LTO enabled. This could have caused
  8617. other undefined behavior in the tests. Fixes bug 27728; bugfix
  8618. on 0.3.5.1-alpha.
  8619. o Minor bugfixes (compilation, netbsd):
  8620. - Add a missing include back into procmon.c. Fixes bug 27990; bugfix
  8621. on 0.3.5.1-alpha.
  8622. o Minor bugfixes (continuous integration, appveyor):
  8623. - Install only the necessary mingw packages during our appveyor
  8624. builds. This change makes the build a little faster, and prevents
  8625. a conflict with a preinstalled mingw openssl that appveyor now
  8626. ships. Fixes bugs 27765 and 27943; bugfix on 0.3.4.2-alpha.
  8627. o Minor bugfixes (directory permissions):
  8628. - When a user requests a group-readable DataDirectory, give it to
  8629. them. Previously, when the DataDirectory and the CacheDirectory
  8630. were the same, the default setting (0) for
  8631. CacheDirectoryGroupReadable would override the setting for
  8632. DataDirectoryGroupReadable. Fixes bug 26913; bugfix
  8633. on 0.3.3.1-alpha.
  8634. o Minor bugfixes (memory leaks):
  8635. - Fix a small memory leak when calling Tor with --dump-config. Fixes
  8636. bug 27893; bugfix on 0.3.2.1-alpha.
  8637. o Minor bugfixes (networking):
  8638. - In retry_listeners_ports(), make sure that we're removing a member
  8639. of old_conns smartlist at most once. Fixes bug 27808; bugfix
  8640. on 0.3.5.1-alpha.
  8641. - Refrain from attempting socket rebinding when old and new
  8642. listeners are in different address families. Fixes bug 27928;
  8643. bugfix on 0.3.5.1-alpha.
  8644. o Minor bugfixes (onion service v3):
  8645. - Stop dumping a stack trace when trying to connect to an intro
  8646. point without having a descriptor for it. Fixes bug 27774; bugfix
  8647. on 0.3.2.1-alpha.
  8648. - Don't warn so loudly when Tor is unable to decode an onion
  8649. descriptor. This can now happen as a normal use case if a client
  8650. gets a descriptor with client authorization but the client is not
  8651. authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha.
  8652. - When selecting a v3 rendezvous point, don't only look at the
  8653. protover, but also check whether the curve25519 onion key is
  8654. present. This way we avoid picking a relay that supports the v3
  8655. rendezvous but for which we don't have the microdescriptor. Fixes
  8656. bug 27797; bugfix on 0.3.2.1-alpha.
  8657. o Minor bugfixes (protover):
  8658. - Reject protocol names containing bytes other than alphanumeric
  8659. characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix
  8660. on 0.2.9.4-alpha.
  8661. o Minor bugfixes (testing):
  8662. - Make the hs_service tests use the same time source when creating
  8663. the introduction point and when testing it. Now tests work better
  8664. on very slow systems like ARM or Travis. Fixes bug 27810; bugfix
  8665. on 0.3.2.1-alpha.
  8666. - In test_rebind.py, check if the Python version is in the supported
  8667. range. Fixes bug 27675; bugfix on 0.3.5.1-alpha.
  8668. o Code simplification and refactoring:
  8669. - Divide more large Tor source files -- especially ones that span
  8670. multiple areas of functionality -- into smaller parts, including
  8671. onion.c and main.c. Closes ticket 26747.
  8672. - Divide the "routerparse.c" module into separate modules for each
  8673. group of parsed objects. Closes ticket 27924.
  8674. - Move protover_rust.c to the same place protover.c was moved to.
  8675. Closes ticket 27814.
  8676. - Split directory.c into separate pieces for client, server, and
  8677. common functionality. Closes ticket 26744.
  8678. - Split the non-statistics-related parts from the rephist.c and
  8679. geoip.c modules. Closes ticket 27892.
  8680. - Split the router.c file into relay-only and shared components, to
  8681. help with future modularization. Closes ticket 27864.
  8682. o Documentation:
  8683. - In the tor-resolve(1) manpage, fix the reference to socks-
  8684. extensions.txt by adding a web URL. Resolves ticket 27853.
  8685. - Mention that we require Python to be 2.7 or newer for some
  8686. integration tests that we ship with Tor. Resolves ticket 27677.
  8687. Changes in version 0.3.5.2-alpha - 2018-09-21
  8688. Tor 0.3.5.2-alpha fixes several bugs in 0.3.5.1-alpha, including one
  8689. that made Tor think it had run out of sockets. Anybody running a relay
  8690. or an onion service on 0.3.5.1-alpha should upgrade.
  8691. o Major bugfixes (relay bandwidth statistics):
  8692. - When we close relayed circuits, report the data in the circuit
  8693. queues as being written in our relay bandwidth stats. This
  8694. mitigates guard discovery and other attacks that close circuits
  8695. for the explicit purpose of noticing this discrepancy in
  8696. statistics. Fixes bug 23512; bugfix on 0.0.8pre3.
  8697. o Major bugfixes (socket accounting):
  8698. - In our socket accounting code, count a socket as closed even when
  8699. it is closed indirectly by the TLS layer. Previously, we would
  8700. count these sockets as still in use, and incorrectly believe that
  8701. we had run out of sockets. Fixes bug 27795; bugfix
  8702. on 0.3.5.1-alpha.
  8703. o Minor bugfixes (32-bit OSX and iOS, timing):
  8704. - Fix an integer overflow bug in our optimized 32-bit millisecond-
  8705. difference algorithm for 32-bit Apple platforms. Previously, it
  8706. would overflow when calculating the difference between two times
  8707. more than 47 days apart. Fixes part of bug 27139; bugfix
  8708. on 0.3.4.1-alpha.
  8709. - Improve the precision of our 32-bit millisecond difference
  8710. algorithm for 32-bit Apple platforms. Fixes part of bug 27139;
  8711. bugfix on 0.3.4.1-alpha.
  8712. - Relax the tolerance on the mainloop/update_time_jumps test when
  8713. running on 32-bit Apple platforms. Fixes part of bug 27139; bugfix
  8714. on 0.3.4.1-alpha.
  8715. o Minor bugfixes (onion service v3):
  8716. - Close all SOCKS request (for the same .onion) if the newly fetched
  8717. descriptor is unusable. Before that, we would close only the first
  8718. one leaving the other hanging and let to time out by themselves.
  8719. Fixes bug 27410; bugfix on 0.3.2.1-alpha.
  8720. o Minor bugfixes (memory leak):
  8721. - Fix an unlikely memory leak when trying to read a private key from
  8722. a ridiculously large file. Fixes bug 27764; bugfix on
  8723. 0.3.5.1-alpha. This is CID 1439488.
  8724. o Minor bugfixes (NSS):
  8725. - Correctly detect failure to open a dummy TCP socket when stealing
  8726. ownership of an fd from the NSS layer. Fixes bug 27782; bugfix
  8727. on 0.3.5.1-alpha.
  8728. o Minor bugfixes (rust):
  8729. - protover_all_supported() would attempt to allocate up to 16GB on
  8730. some inputs, leading to a potential memory DoS. Fixes bug 27206;
  8731. bugfix on 0.3.3.5-rc.
  8732. o Minor bugfixes (testing):
  8733. - Revise the "conditionvar_timeout" test so that it succeeds even on
  8734. heavily loaded systems where the test threads are not scheduled
  8735. within 200 msec. Fixes bug 27073; bugfix on 0.2.6.3-alpha.
  8736. o Code simplification and refactoring:
  8737. - Divide the routerlist.c and dirserv.c modules into smaller parts.
  8738. Closes ticket 27799.
  8739. Changes in version 0.3.5.1-alpha - 2018-09-18
  8740. Tor 0.3.5.1-alpha is the first release of the 0.3.5.x series. It adds
  8741. client authorization for modern (v3) onion services, improves
  8742. bootstrap reporting, begins reorganizing Tor's codebase, adds optional
  8743. support for NSS in place of OpenSSL, and much more.
  8744. o Major features (onion services, UI change):
  8745. - For a newly created onion service, the default version is now 3.
  8746. Tor still supports existing version 2 services, but the operator
  8747. now needs to set "HiddenServiceVersion 2" in order to create a new
  8748. version 2 service. For existing services, Tor now learns the
  8749. version by reading the key file. Closes ticket 27215.
  8750. o Major features (relay, UI change):
  8751. - Relays no longer run as exits by default. If the "ExitRelay"
  8752. option is auto (or unset), and no exit policy is specified with
  8753. ExitPolicy or ReducedExitPolicy, we now treat ExitRelay as 0.
  8754. Previously in this case, we allowed exit traffic and logged a
  8755. warning message. Closes ticket 21530. Patch by Neel Chauhan.
  8756. - Tor now validates that the ContactInfo config option is valid UTF-
  8757. 8 when parsing torrc. Closes ticket 27428.
  8758. o Major features (bootstrap):
  8759. - Don't report directory progress until after a connection to a
  8760. relay or bridge has succeeded. Previously, we'd report 80%
  8761. progress based on cached directory information when we couldn't
  8762. even connect to the network. Closes ticket 27169.
  8763. o Major features (new code layout):
  8764. - Nearly all of Tor's source code has been moved around into more
  8765. logical places. The "common" directory is now divided into a set
  8766. of libraries in "lib", and files in the "or" directory have been
  8767. split into "core" (logic absolutely needed for onion routing),
  8768. "feature" (independent modules in Tor), and "app" (to configure
  8769. and invoke the rest of Tor). See doc/HACKING/CodeStructure.md for
  8770. more information. Closes ticket 26481.
  8771. This refactoring is not complete: although the libraries have been
  8772. refactored to be acyclic, the main body of Tor is still too
  8773. interconnected. We will attempt to improve this in the future.
  8774. o Major features (onion services v3):
  8775. - Implement onion service client authorization at the descriptor
  8776. level: only authorized clients can decrypt a service's descriptor
  8777. to find out how to contact it. A new torrc option was added to
  8778. control this client side: ClientOnionAuthDir <path>. On the
  8779. service side, if the "authorized_clients/" directory exists in the
  8780. onion service directory path, client configurations are read from
  8781. the files within. See the manpage for more details. Closes ticket
  8782. 27547. Patch done by Suphanat Chunhapanya (haxxpop).
  8783. - Improve revision counter generation in next-gen onion services.
  8784. Onion services can now scale by hosting multiple instances on
  8785. different hosts without synchronization between them, which was
  8786. previously impossible because descriptors would get rejected by
  8787. HSDirs. Addresses ticket 25552.
  8788. o Major features (portability, cryptography, experimental, TLS):
  8789. - Tor now has the option to compile with the NSS library instead of
  8790. OpenSSL. This feature is experimental, and we expect that bugs may
  8791. remain. It is mainly intended for environments where Tor's
  8792. performance is not CPU-bound, and where NSS is already known to be
  8793. installed. To try it out, configure Tor with the --enable-nss
  8794. flag. Closes tickets 26631, 26815, and 26816.
  8795. If you are experimenting with this option and using an old cached
  8796. consensus, Tor may fail to start. To solve this, delete your
  8797. "cached-consensus" and "cached-microdesc-consensus" files,
  8798. (if present), and restart Tor.
  8799. o Major bugfixes (directory authority):
  8800. - Actually check that the address we get from DirAuthority
  8801. configuration line is valid IPv4. Explicitly disallow DirAuthority
  8802. address to be a DNS hostname. Fixes bug 26488; bugfix
  8803. on 0.1.2.10-rc.
  8804. o Major bugfixes (restart-in-process):
  8805. - Fix a use-after-free error that could be caused by passing Tor an
  8806. impossible set of options that would fail during options_act().
  8807. Fixes bug 27708; bugfix on 0.3.3.1-alpha.
  8808. o Minor features (admin tools):
  8809. - Add a new --key-expiration option to print the expiration date of
  8810. the signing cert in an ed25519_signing_cert file. Resolves
  8811. issue 19506.
  8812. o Minor features (build):
  8813. - If you pass the "--enable-pic" option to configure, Tor will try
  8814. to tell the compiler to build position-independent code suitable
  8815. to link into a dynamic library. (The default remains -fPIE, for
  8816. code suitable for a relocatable executable.) Closes ticket 23846.
  8817. o Minor features (code correctness, testing):
  8818. - Tor's build process now includes a "check-includes" make target to
  8819. verify that no module of Tor relies on any headers from a higher-
  8820. level module. We hope to use this feature over time to help
  8821. refactor our codebase. Closes ticket 26447.
  8822. o Minor features (code layout):
  8823. - We have a new "lowest-level" error-handling API for use by code
  8824. invoked from within the logging module. With this interface, the
  8825. logging code is no longer at risk of calling into itself if a
  8826. failure occurs while it is trying to log something. Closes
  8827. ticket 26427.
  8828. o Minor features (compilation):
  8829. - Tor's configure script now supports a --with-malloc= option to
  8830. select your malloc implementation. Supported options are
  8831. "tcmalloc", "jemalloc", "openbsd" (deprecated), and "system" (the
  8832. default). Addresses part of ticket 20424. Based on a patch from
  8833. Alex Xu.
  8834. o Minor features (config):
  8835. - The "auto" keyword in torrc is now case-insensitive. Closes
  8836. ticket 26663.
  8837. o Minor features (continuous integration):
  8838. - Don't do a distcheck with --disable-module-dirauth in Travis.
  8839. Implements ticket 27252.
  8840. - Install libcap-dev and libseccomp2-dev so these optional
  8841. dependencies get tested on Travis CI. Closes ticket 26560.
  8842. - Only run one online rust build in Travis, to reduce network
  8843. errors. Skip offline rust builds on Travis for Linux gcc, because
  8844. they're redundant. Implements ticket 27252.
  8845. - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a
  8846. duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on
  8847. Linux with default settings, because all the non-default builds
  8848. use gcc on Linux. Implements ticket 27252.
  8849. o Minor features (controller):
  8850. - Emit CIRC_BW events as soon as we detect that we processed an
  8851. invalid or otherwise dropped cell on a circuit. This allows
  8852. vanguards and other controllers to react more quickly to dropped
  8853. cells. Closes ticket 27678.
  8854. - For purposes of CIRC_BW-based dropped cell detection, track half-
  8855. closed stream ids, and allow their ENDs, SENDMEs, DATA and path
  8856. bias check cells to arrive without counting it as dropped until
  8857. either the END arrives, or the windows are empty. Closes
  8858. ticket 25573.
  8859. - Implement a 'GETINFO md/all' controller command to enable getting
  8860. all known microdescriptors. Closes ticket 8323.
  8861. - The GETINFO command now support an "uptime" argument, to return
  8862. Tor's uptime in seconds. Closes ticket 25132.
  8863. o Minor features (denial-of-service avoidance):
  8864. - Make our OOM handler aware of the DNS cache so that it doesn't
  8865. fill up the memory. This check is important for our DoS mitigation
  8866. subsystem. Closes ticket 18642. Patch by Neel Chauhan.
  8867. o Minor features (development):
  8868. - Tor's makefile now supports running the "clippy" Rust style tool
  8869. on our Rust code. Closes ticket 22156.
  8870. o Minor features (directory authority):
  8871. - There is no longer an artificial upper limit on the length of
  8872. bandwidth lines. Closes ticket 26223.
  8873. - When a bandwidth file is used to obtain the bandwidth measurements,
  8874. include this bandwidth file headers in the votes. Closes
  8875. ticket 3723.
  8876. - Improved support for networks with only a single authority or a
  8877. single fallback directory. Patch from Gabriel Somlo. Closes
  8878. ticket 25928.
  8879. o Minor features (embedding API):
  8880. - The Tor controller API now supports a function to launch Tor with
  8881. a preconstructed owning controller FD, so that embedding
  8882. applications don't need to manage controller ports and
  8883. authentication. Closes ticket 24204.
  8884. - The Tor controller API now has a function that returns the name
  8885. and version of the backend implementing the API. Closes
  8886. ticket 26947.
  8887. o Minor features (geoip):
  8888. - Update geoip and geoip6 to the September 6 2018 Maxmind GeoLite2
  8889. Country database. Closes ticket 27631.
  8890. o Minor features (memory management):
  8891. - Get Libevent to use the same memory allocator as Tor, by calling
  8892. event_set_mem_functions() during initialization. Resolves
  8893. ticket 8415.
  8894. o Minor features (memory usage):
  8895. - When not using them, store legacy TAP public onion keys in DER-
  8896. encoded format, rather than as expanded public keys. This should
  8897. save several megabytes on typical clients. Closes ticket 27246.
  8898. o Minor features (OpenSSL):
  8899. - When possible, use RFC5869 HKDF implementation from OpenSSL rather
  8900. than our own. Resolves ticket 19979.
  8901. o Minor features (Rust, code quality):
  8902. - Improve rust code quality in the rust protover implementation by
  8903. making it more idiomatic. Includes changing an internal API to
  8904. take &str instead of &String. Closes ticket 26492.
  8905. o Minor features (testing):
  8906. - Add scripts/test/chutney-git-bisect.sh, for bisecting using
  8907. chutney. Implements ticket 27211.
  8908. o Minor features (tor-resolve):
  8909. - The tor-resolve utility can now be used with IPv6 SOCKS proxies.
  8910. Side-effect of the refactoring for ticket 26526.
  8911. o Minor features (UI):
  8912. - Log each included configuration file or directory as we read it,
  8913. to provide more visibility about where Tor is reading from. Patch
  8914. from Unto Sten; closes ticket 27186.
  8915. - Lower log level of "Scheduler type KIST has been enabled" to INFO.
  8916. Closes ticket 26703.
  8917. o Minor bugfixes (bootstrap):
  8918. - Try harder to get descriptors in non-exit test networks, by using
  8919. the mid weight for the third hop when there are no exits. Fixes
  8920. bug 27237; bugfix on 0.2.6.2-alpha.
  8921. o Minor bugfixes (C correctness):
  8922. - Avoid casting smartlist index to int implicitly, as it may trigger
  8923. a warning (-Wshorten-64-to-32). Fixes bug 26282; bugfix on
  8924. 0.2.3.13-alpha, 0.2.7.1-alpha and 0.2.1.1-alpha.
  8925. - Use time_t for all values in
  8926. predicted_ports_prediction_time_remaining(). Rework the code that
  8927. computes difference between durations/timestamps. Fixes bug 27165;
  8928. bugfix on 0.3.1.1-alpha.
  8929. o Minor bugfixes (client, memory usage):
  8930. - When not running as a directory cache, there is no need to store
  8931. the text of the current consensus networkstatus in RAM.
  8932. Previously, however, clients would store it anyway, at a cost of
  8933. over 5 MB. Now, they do not. Fixes bug 27247; bugfix
  8934. on 0.3.0.1-alpha.
  8935. o Minor bugfixes (client, reachableaddresses):
  8936. - Instead of adding a "reject *:*" line to ReachableAddresses when
  8937. loading the configuration, add one to the policy after parsing it
  8938. in parse_reachable_addresses(). This prevents extra "reject *.*"
  8939. lines from accumulating on reloads. Fixes bug 20874; bugfix on
  8940. 0.1.1.5-alpha. Patch by Neel Chauhan.
  8941. o Minor bugfixes (code quality):
  8942. - Rename sandbox_getaddrinfo() and other functions to no longer
  8943. misleadingly suggest that they are sandbox-only. Fixes bug 26525;
  8944. bugfix on 0.2.7.1-alpha.
  8945. o Minor bugfixes (configuration, Onion Services):
  8946. - In rend_service_parse_port_config(), disallow any input to remain
  8947. after address-port pair was parsed. This will catch address and
  8948. port being whitespace-separated by mistake of the user. Fixes bug
  8949. 27044; bugfix on 0.2.9.10.
  8950. o Minor bugfixes (continuous integration):
  8951. - Stop reinstalling identical packages in our Windows CI. Fixes bug
  8952. 27464; bugfix on 0.3.4.1-alpha.
  8953. o Minor bugfixes (controller):
  8954. - Consider all routerinfo errors other than "not a server" to be
  8955. transient for the purpose of "GETINFO exit-policy/*" controller
  8956. request. Print stacktrace in the unlikely case of failing to
  8957. recompute routerinfo digest. Fixes bug 27034; bugfix
  8958. on 0.3.4.1-alpha.
  8959. o Minor bugfixes (directory connection shutdown):
  8960. - Avoid a double-close when shutting down a stalled directory
  8961. connection. Fixes bug 26896; bugfix on 0.3.4.1-alpha.
  8962. o Minor bugfixes (HTTP tunnel):
  8963. - Fix a bug warning when closing an HTTP tunnel connection due to an
  8964. HTTP request we couldn't handle. Fixes bug 26470; bugfix
  8965. on 0.3.2.1-alpha.
  8966. o Minor bugfixes (ipv6):
  8967. - In addrs_in_same_network_family(), we choose the subnet size based
  8968. on the IP version (IPv4 or IPv6). Previously, we chose a fixed
  8969. subnet size of /16 for both IPv4 and IPv6 addresses. Fixes bug
  8970. 15518; bugfix on 0.2.3.1-alpha. Patch by Neel Chauhan.
  8971. o Minor bugfixes (logging):
  8972. - As a precaution, do an early return from log_addr_has_changed() if
  8973. Tor is running as client. Also, log a stack trace for debugging as
  8974. this function should only be called when Tor runs as server. Fixes
  8975. bug 26892; bugfix on 0.1.1.9-alpha.
  8976. - Refrain from mentioning bug 21018 in the logs, as it is already
  8977. fixed. Fixes bug 25477; bugfix on 0.2.9.8.
  8978. o Minor bugfixes (logging, documentation):
  8979. - When SafeLogging is enabled, scrub IP address in
  8980. channel_tls_process_netinfo_cell(). Also, add a note to manpage
  8981. that scrubbing is not guaranteed on loglevels below Notice. Fixes
  8982. bug 26882; bugfix on 0.2.4.10-alpha.
  8983. o Minor bugfixes (netflow padding):
  8984. - Ensure circuitmux queues are empty before scheduling or sending
  8985. padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha.
  8986. o Minor bugfixes (onion service v2):
  8987. - Log at level "info", not "warning", in the case that we do not
  8988. have a consensus when a .onion request comes in. This can happen
  8989. normally while bootstrapping. Fixes bug 27040; bugfix
  8990. on 0.2.8.2-alpha.
  8991. o Minor bugfixes (onion service v3):
  8992. - When the onion service directory can't be created or has the wrong
  8993. permissions, do not log a stack trace. Fixes bug 27335; bugfix
  8994. on 0.3.2.1-alpha.
  8995. o Minor bugfixes (OS compatibility):
  8996. - Properly handle configuration changes that move a listener to/from
  8997. wildcard IP address. If the first attempt to bind a socket fails,
  8998. close the old listener and try binding the socket again. Fixes bug
  8999. 17873; bugfix on 0.0.8pre-1.
  9000. o Minor bugfixes (performance)::
  9001. - Rework node_is_a_configured_bridge() to no longer call
  9002. node_get_all_orports(), which was performing too many memory
  9003. allocations. Fixes bug 27224; bugfix on 0.2.3.9.
  9004. o Minor bugfixes (relay statistics):
  9005. - Update relay descriptor on bandwidth changes only when the uptime
  9006. is smaller than 24h, in order to reduce the efficiency of guard
  9007. discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha.
  9008. o Minor bugfixes (relays):
  9009. - Consider the fact that we'll be making direct connections to our
  9010. entry and guard nodes when computing the fraction of nodes that
  9011. have their descriptors. Also, if we are using bridges and there is
  9012. at least one bridge with a full descriptor, treat the fraction of
  9013. guards available as 100%. Fixes bug 25886; bugfix on 0.2.4.10-alpha.
  9014. Patch by Neel Chauhan.
  9015. - Update the message logged on relays when DirCache is disabled.
  9016. Since 0.3.3.5-rc, authorities require DirCache (V2Dir) for the
  9017. Guard flag. Fixes bug 24312; bugfix on 0.3.3.5-rc.
  9018. o Minor bugfixes (rust, protover):
  9019. - Compute protover votes correctly in the rust version of the
  9020. protover code. Previously, the protover rewrite in 24031 allowed
  9021. repeated votes from the same voter for the same protocol version
  9022. to be counted multiple times in protover_compute_vote(). Fixes bug
  9023. 27649; bugfix on 0.3.3.5-rc.
  9024. - Reject protover names that contain invalid characters. Fixes bug
  9025. 27687; bugfix on 0.3.3.1-alpha.
  9026. o Minor bugfixes (testing):
  9027. - Fix two unit tests to work when HOME environment variable is not
  9028. set. Fixes bug 27096; bugfix on 0.2.8.1-alpha.
  9029. - If a unit test running in a subprocess exits abnormally or with a
  9030. nonzero status code, treat the test as having failed, even if the
  9031. test reported success. Without this fix, memory leaks don't cause
  9032. the tests to fail, even with LeakSanitizer. Fixes bug 27658;
  9033. bugfix on 0.2.2.4-alpha.
  9034. - When logging a version mismatch in our openssl_version tests,
  9035. report the actual offending version strings. Fixes bug 26152;
  9036. bugfix on 0.2.9.1-alpha.
  9037. - Fix forking tests on Windows when there is a space somewhere in
  9038. the path. Fixes bug 26437; bugfix on 0.2.2.4-alpha.
  9039. o Code simplification and refactoring:
  9040. - 'updateFallbackDirs.py' now ignores the blacklist file, as it's not
  9041. longer needed. Closes ticket 26502.
  9042. - Include paths to header files within Tor are now qualified by
  9043. directory within the top-level src directory.
  9044. - Many structures have been removed from the centralized "or.h"
  9045. header, and moved into their own headers. This will allow us to
  9046. reduce the number of places in the code that rely on each
  9047. structure's contents and layout. Closes ticket 26383.
  9048. - Remove ATTR_NONNULL macro from codebase. Resolves ticket 26527.
  9049. - Remove GetAdaptersAddresses_fn_t. The code that used it was
  9050. removed as part of the 26481 refactor. Closes ticket 27467.
  9051. - Rework Tor SOCKS server code to use Trunnel and benefit from
  9052. autogenerated functions for parsing and generating SOCKS wire
  9053. format. New implementation is cleaner, more maintainable and
  9054. should be less prone to heartbleed-style vulnerabilities.
  9055. Implements a significant fraction of ticket 3569.
  9056. - Split sampled_guards_update_from_consensus() and
  9057. select_entry_guard_for_circuit() into subfunctions. In
  9058. entry_guards_update_primary() unite three smartlist enumerations
  9059. into one and move smartlist comparison code out of the function.
  9060. Closes ticket 21349.
  9061. - Tor now assumes that you have standards-conformant stdint.h and
  9062. inttypes.h headers when compiling. Closes ticket 26626.
  9063. - Unify our bloom filter logic. Previously we had two copies of this
  9064. code: one for routerlist filtering, and one for address set
  9065. calculations. Closes ticket 26510.
  9066. - Use the simpler strcmpstart() helper in
  9067. rend_parse_v2_service_descriptor instead of strncmp(). Closes
  9068. ticket 27630.
  9069. - Utility functions that can perform a DNS lookup are now wholly
  9070. separated from those that can't, in separate headers and C
  9071. modules. Closes ticket 26526.
  9072. o Documentation:
  9073. - Copy paragraph and URL to Tor's code of conduct document from
  9074. CONTRIBUTING to new CODE_OF_CONDUCT file. Resolves ticket 26638.
  9075. - Remove old instructions from INSTALL document. Closes ticket 26588.
  9076. - Warn users that they should not include MyFamily line(s) in their
  9077. torrc when running Tor bridge. Closes ticket 26908.
  9078. o Removed features:
  9079. - Tor no longer supports building with the dmalloc library. For
  9080. debugging memory issues, we suggest using gperftools or msan
  9081. instead. Closes ticket 26426.
  9082. - Tor no longer attempts to run on Windows environments without the
  9083. GetAdaptersAddresses() function. This function has existed since
  9084. Windows XP, which is itself already older than we support.
  9085. - Remove Tor2web functionality for version 2 onion services. The
  9086. Tor2webMode and Tor2webRendezvousPoints options are now obsolete.
  9087. (This feature was never shipped in vanilla Tor and it was only
  9088. possible to use this feature by building the support at compile
  9089. time. Tor2webMode is not implemented for version 3 onion services.)
  9090. Closes ticket 26367.
  9091. Changes in version 0.2.9.17 - 2018-09-10
  9092. Tor 0.2.9.17 backports numerous bugfixes from later versions of Tor.
  9093. o Minor features (compatibility, backport from 0.3.4.8):
  9094. - Tell OpenSSL to maintain backward compatibility with previous
  9095. RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
  9096. ciphers are disabled by default. Closes ticket 27344.
  9097. o Minor features (continuous integration, backport from 0.3.4.7-rc):
  9098. - Enable macOS builds in our Travis CI configuration. Closes
  9099. ticket 24629.
  9100. - Install libcap-dev and libseccomp2-dev so these optional
  9101. dependencies get tested on Travis CI. Closes ticket 26560.
  9102. - Run asciidoc during Travis CI. Implements ticket 27087.
  9103. - Use ccache in our Travis CI configuration. Closes ticket 26952.
  9104. o Minor features (geoip):
  9105. - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
  9106. Country database. Closes ticket 27089.
  9107. o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
  9108. - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
  9109. tell the compiler not to include the system malloc implementation.
  9110. Fixes bug 20424; bugfix on 0.2.0.20-rc.
  9111. o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
  9112. - Silence a spurious compiler warning on the GetAdaptersAddresses
  9113. function pointer cast. This issue is already fixed by 26481 in
  9114. 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
  9115. bugfix on 0.2.3.11-alpha.
  9116. - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
  9117. supported, and always fails. Some compilers warn about the
  9118. function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
  9119. on 0.2.2.23-alpha.
  9120. o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
  9121. - Don't link or search for pthreads when building for Windows, even
  9122. if we are using build environment (like mingw) that provides a
  9123. pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
  9124. o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
  9125. - Skip a pair of unreliable key generation tests on Windows, until
  9126. the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
  9127. bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
  9128. o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
  9129. - Pass the module flags to distcheck configure, and log the flags
  9130. before running configure. (Backported to 0.2.9 and later as a
  9131. precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
  9132. o Minor bugfixes (continuous integration, backport from 0.3.4.8):
  9133. - When a Travis build fails, and showing a log fails, keep trying to
  9134. show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
  9135. - When we use echo in Travis, don't pass a --flag as the first
  9136. argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
  9137. o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
  9138. - When voting for recommended versions, make sure that all of the
  9139. versions are well-formed and parsable. Fixes bug 26485; bugfix
  9140. on 0.1.1.6-alpha.
  9141. o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
  9142. - Fix a bug in out sandboxing rules for the openat() syscall.
  9143. Previously, no openat() call would be permitted, which would break
  9144. filesystem operations on recent glibc versions. Fixes bug 25440;
  9145. bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
  9146. o Minor bugfixes (onion services, backport from 0.3.4.8):
  9147. - Silence a spurious compiler warning in
  9148. rend_client_send_introduction(). Fixes bug 27463; bugfix
  9149. on 0.1.1.2-alpha.
  9150. o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
  9151. - Log a protocol warning when single onion services or Tor2web clients
  9152. fail to authenticate direct connections to relays.
  9153. Fixes bug 26924; bugfix on 0.2.9.1-alpha.
  9154. o Minor bugfixes (testing, backport from 0.3.4.6-rc):
  9155. - Disable core dumps in test_bt.sh, to avoid failures in "make
  9156. distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
  9157. o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
  9158. - Before running make test-network-all, delete old logs and test
  9159. result files, to avoid spurious failures. Fixes bug 27295; bugfix
  9160. on 0.2.7.3-rc.
  9161. o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
  9162. - Our "tortls/cert_matches_key" unit test no longer relies on
  9163. OpenSSL internals. Previously, it relied on unsupported OpenSSL
  9164. behavior in a way that caused it to crash with OpenSSL 1.0.2p.
  9165. Fixes bug 27226; bugfix on 0.2.5.1-alpha.
  9166. o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
  9167. - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
  9168. 27185; bugfix on 0.2.2.2-alpha.
  9169. Changes in version 0.3.2.12 - 2018-09-10
  9170. Tor 0.3.2.12 backport numerous fixes from later versions of Tor.
  9171. o Minor features (compatibility, backport from 0.3.4.8):
  9172. - Tell OpenSSL to maintain backward compatibility with previous
  9173. RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
  9174. ciphers are disabled by default. Closes ticket 27344.
  9175. o Minor features (continuous integration, backport from 0.3.4.7-rc):
  9176. - Enable macOS builds in our Travis CI configuration. Closes
  9177. ticket 24629.
  9178. - Install libcap-dev and libseccomp2-dev so these optional
  9179. dependencies get tested on Travis CI. Closes ticket 26560.
  9180. - Run asciidoc during Travis CI. Implements ticket 27087.
  9181. - Use ccache in our Travis CI configuration. Closes ticket 26952.
  9182. o Minor features (continuous integration, rust, backport from 0.3.4.7-rc):
  9183. - Use cargo cache in our Travis CI configuration. Closes
  9184. ticket 26952.
  9185. o Minor features (controller, backport from 0.3.4.6-rc):
  9186. - The control port now exposes the list of HTTPTunnelPorts and
  9187. ExtOrPorts via GETINFO net/listeners/httptunnel and
  9188. net/listeners/extor respectively. Closes ticket 26647.
  9189. o Minor features (directory authorities, backport from 0.3.4.7-rc):
  9190. - Authorities no longer vote to make the subprotocol version
  9191. "LinkAuth=1" a requirement: it is unsupportable with NSS, and
  9192. hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
  9193. o Minor features (geoip):
  9194. - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
  9195. Country database. Closes ticket 27089.
  9196. o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
  9197. - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
  9198. tell the compiler not to include the system malloc implementation.
  9199. Fixes bug 20424; bugfix on 0.2.0.20-rc.
  9200. - Don't try to use a pragma to temporarily disable the
  9201. -Wunused-const-variable warning if the compiler doesn't support
  9202. it. Fixes bug 26785; bugfix on 0.3.2.11.
  9203. o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
  9204. - Silence a spurious compiler warning on the GetAdaptersAddresses
  9205. function pointer cast. This issue is already fixed by 26481 in
  9206. 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
  9207. bugfix on 0.2.3.11-alpha.
  9208. - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
  9209. supported, and always fails. Some compilers warn about the
  9210. function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
  9211. on 0.2.2.23-alpha.
  9212. o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
  9213. - Don't link or search for pthreads when building for Windows, even
  9214. if we are using build environment (like mingw) that provides a
  9215. pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
  9216. o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
  9217. - Skip a pair of unreliable key generation tests on Windows, until
  9218. the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
  9219. bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
  9220. o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
  9221. - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
  9222. - Pass the module flags to distcheck configure, and log the flags
  9223. before running configure. (Backported to 0.2.9 and later as a
  9224. precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
  9225. o Minor bugfixes (continuous integration, backport from 0.3.4.8):
  9226. - When a Travis build fails, and showing a log fails, keep trying to
  9227. show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
  9228. - When we use echo in Travis, don't pass a --flag as the first
  9229. argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
  9230. o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
  9231. - When voting for recommended versions, make sure that all of the
  9232. versions are well-formed and parsable. Fixes bug 26485; bugfix
  9233. on 0.1.1.6-alpha.
  9234. o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
  9235. - Fix a bug in out sandboxing rules for the openat() syscall.
  9236. Previously, no openat() call would be permitted, which would break
  9237. filesystem operations on recent glibc versions. Fixes bug 25440;
  9238. bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
  9239. o Minor bugfixes (logging, backport from 0.3.4.6-rc):
  9240. - Improve the log message when connection initiators fail to
  9241. authenticate direct connections to relays. Fixes bug 26927; bugfix
  9242. on 0.3.0.1-alpha.
  9243. o Minor bugfixes (onion services, backport from 0.3.4.7-rc):
  9244. - Fix bug that causes services to not ever rotate their descriptors
  9245. if they were getting SIGHUPed often. Fixes bug 26932; bugfix
  9246. on 0.3.2.1-alpha.
  9247. o Minor bugfixes (onion services, backport from 0.3.4.8):
  9248. - Silence a spurious compiler warning in
  9249. rend_client_send_introduction(). Fixes bug 27463; bugfix
  9250. on 0.1.1.2-alpha.
  9251. o Minor bugfixes (rust, backport from 0.3.4.7-rc):
  9252. - Backport test_rust.sh from master. Fixes bug 26497; bugfix
  9253. on 0.3.1.5-alpha.
  9254. - Consistently use ../../.. as a fallback for $abs_top_srcdir in
  9255. test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha.
  9256. - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or
  9257. $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha.
  9258. o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
  9259. - Log a protocol warning when single onion services or Tor2web clients
  9260. fail to authenticate direct connections to relays.
  9261. Fixes bug 26924; bugfix on 0.2.9.1-alpha.
  9262. o Minor bugfixes (testing, backport from 0.3.4.6-rc):
  9263. - Disable core dumps in test_bt.sh, to avoid failures in "make
  9264. distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
  9265. o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
  9266. - When running make test-network-all, use the mixed+hs-v2 network.
  9267. (A previous fix to chutney removed v3 onion services from the
  9268. mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
  9269. confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
  9270. - Before running make test-network-all, delete old logs and test
  9271. result files, to avoid spurious failures. Fixes bug 27295; bugfix
  9272. on 0.2.7.3-rc.
  9273. o Minor bugfixes (testing, openssl compatibility):
  9274. - Our "tortls/cert_matches_key" unit test no longer relies on OpenSSL
  9275. internals. Previously, it relied on unsupported OpenSSL behavior in
  9276. a way that caused it to crash with OpenSSL 1.0.2p. Fixes bug 27226;
  9277. bugfix on 0.2.5.1-alpha.
  9278. o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
  9279. - Our "tortls/cert_matches_key" unit test no longer relies on
  9280. OpenSSL internals. Previously, it relied on unsupported OpenSSL
  9281. behavior in a way that caused it to crash with OpenSSL 1.0.2p.
  9282. Fixes bug 27226; bugfix on 0.2.5.1-alpha.
  9283. o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
  9284. - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
  9285. 27185; bugfix on 0.2.2.2-alpha.
  9286. Changes in version 0.3.3.10 - 2018-09-10
  9287. Tor 0.3.3.10 backports numerous fixes from later versions of Tor.
  9288. o Minor features (bug workaround, backport from 0.3.4.7-rc):
  9289. - Compile correctly on systems that provide the C11 stdatomic.h
  9290. header, but where C11 atomic functions don't actually compile.
  9291. Closes ticket 26779; workaround for Debian issue 903709.
  9292. o Minor features (compatibility, backport from 0.3.4.8):
  9293. - Tell OpenSSL to maintain backward compatibility with previous
  9294. RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
  9295. ciphers are disabled by default. Closes ticket 27344.
  9296. o Minor features (continuous integration, backport from 0.3.4.7-rc):
  9297. - Backport Travis rust distcheck to 0.3.3. Closes ticket 24629.
  9298. - Enable macOS builds in our Travis CI configuration. Closes
  9299. ticket 24629.
  9300. - Install libcap-dev and libseccomp2-dev so these optional
  9301. dependencies get tested on Travis CI. Closes ticket 26560.
  9302. - Run asciidoc during Travis CI. Implements ticket 27087.
  9303. - Use ccache in our Travis CI configuration. Closes ticket 26952.
  9304. o Minor features (continuous integration, rust, backport from 0.3.4.7-rc):
  9305. - Use cargo cache in our Travis CI configuration. Closes
  9306. ticket 26952.
  9307. o Minor features (controller, backport from 0.3.4.6-rc):
  9308. - The control port now exposes the list of HTTPTunnelPorts and
  9309. ExtOrPorts via GETINFO net/listeners/httptunnel and
  9310. net/listeners/extor respectively. Closes ticket 26647.
  9311. o Minor features (directory authorities, backport from 0.3.4.7-rc):
  9312. - Authorities no longer vote to make the subprotocol version
  9313. "LinkAuth=1" a requirement: it is unsupportable with NSS, and
  9314. hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
  9315. o Minor features (geoip):
  9316. - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
  9317. Country database. Closes ticket 27089.
  9318. o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
  9319. - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
  9320. tell the compiler not to include the system malloc implementation.
  9321. Fixes bug 20424; bugfix on 0.2.0.20-rc.
  9322. - Don't try to use a pragma to temporarily disable the
  9323. -Wunused-const-variable warning if the compiler doesn't support
  9324. it. Fixes bug 26785; bugfix on 0.3.2.11.
  9325. o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
  9326. - Silence a spurious compiler warning on the GetAdaptersAddresses
  9327. function pointer cast. This issue is already fixed by 26481 in
  9328. 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
  9329. bugfix on 0.2.3.11-alpha.
  9330. - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
  9331. supported, and always fails. Some compilers warn about the
  9332. function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
  9333. on 0.2.2.23-alpha.
  9334. o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
  9335. - Don't link or search for pthreads when building for Windows, even
  9336. if we are using build environment (like mingw) that provides a
  9337. pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
  9338. o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
  9339. - Skip a pair of unreliable key generation tests on Windows, until
  9340. the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
  9341. bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
  9342. o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
  9343. - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
  9344. - Pass the module flags to distcheck configure, and log the flags
  9345. before running configure. (Backported to 0.2.9 and later as a
  9346. precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
  9347. o Minor bugfixes (continuous integration, backport from 0.3.4.8):
  9348. - When a Travis build fails, and showing a log fails, keep trying to
  9349. show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
  9350. - When we use echo in Travis, don't pass a --flag as the first
  9351. argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
  9352. o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
  9353. - When voting for recommended versions, make sure that all of the
  9354. versions are well-formed and parsable. Fixes bug 26485; bugfix
  9355. on 0.1.1.6-alpha.
  9356. o Minor bugfixes (in-process restart, backport from 0.3.4.7-rc):
  9357. - Always call tor_free_all() when leaving tor_run_main(). When we
  9358. did not, restarting tor in-process would cause an assertion
  9359. failure. Fixes bug 26948; bugfix on 0.3.3.1-alpha.
  9360. o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
  9361. - Fix a bug in our sandboxing rules for the openat() syscall.
  9362. Previously, no openat() call would be permitted, which would break
  9363. filesystem operations on recent glibc versions. Fixes bug 25440;
  9364. bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
  9365. o Minor bugfixes (logging, backport from 0.3.4.6-rc):
  9366. - Improve the log message when connection initiators fail to
  9367. authenticate direct connections to relays. Fixes bug 26927; bugfix
  9368. on 0.3.0.1-alpha.
  9369. o Minor bugfixes (onion services, backport from 0.3.4.7-rc):
  9370. - Fix bug that causes services to not ever rotate their descriptors
  9371. if they were getting SIGHUPed often. Fixes bug 26932; bugfix
  9372. on 0.3.2.1-alpha.
  9373. o Minor bugfixes (onion services, backport from 0.3.4.8):
  9374. - Silence a spurious compiler warning in
  9375. rend_client_send_introduction(). Fixes bug 27463; bugfix
  9376. on 0.1.1.2-alpha.
  9377. o Minor bugfixes (portability, backport from 0.3.4.6-rc):
  9378. - Work around two different bugs in the OS X 10.10 and later SDKs
  9379. that would prevent us from successfully targeting earlier versions
  9380. of OS X. Fixes bug 26876; bugfix on 0.3.3.1-alpha.
  9381. o Minor bugfixes (portability, backport from 0.3.4.7-rc):
  9382. - Fix compilation of the unit tests on GNU/Hurd, which does not
  9383. define PATH_MAX. Fixes bug 26873; bugfix on 0.3.3.1-alpha. Patch
  9384. from "paulusASol".
  9385. o Minor bugfixes (rust, backport from 0.3.4.7-rc):
  9386. - Backport test_rust.sh from master. Fixes bug 26497; bugfix
  9387. on 0.3.1.5-alpha.
  9388. - Consistently use ../../.. as a fallback for $abs_top_srcdir in
  9389. test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha.
  9390. - Protover parsing was accepting the presence of whitespace in
  9391. version strings, which the C implementation would choke on, e.g.
  9392. "Desc=1\t,2". Fixes bug 27177; bugfix on 0.3.3.5-rc.
  9393. - Protover parsing was ignoring a 2nd hyphen and everything after
  9394. it, accepting entries like "Link=1-5-foo". Fixes bug 27164; bugfix
  9395. on 0.3.3.1-alpha.
  9396. - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or
  9397. $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha.
  9398. - cd to ${abs_top_builddir}/src/rust before running cargo in
  9399. src/test/test_rust.sh. This makes the working directory consistent
  9400. between builds and tests. Fixes bug 26497; bugfix on 0.3.3.2-alpha.
  9401. o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
  9402. - Log a protocol warning when single onion services or Tor2web clients
  9403. fail to authenticate direct connections to relays.
  9404. Fixes bug 26924; bugfix on 0.2.9.1-alpha.
  9405. o Minor bugfixes (testing, backport from 0.3.4.6-rc):
  9406. - Disable core dumps in test_bt.sh, to avoid failures in "make
  9407. distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
  9408. o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
  9409. - When running make test-network-all, use the mixed+hs-v2 network.
  9410. (A previous fix to chutney removed v3 onion services from the
  9411. mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
  9412. confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
  9413. - Before running make test-network-all, delete old logs and test
  9414. result files, to avoid spurious failures. Fixes bug 27295; bugfix
  9415. on 0.2.7.3-rc.
  9416. o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
  9417. - Our "tortls/cert_matches_key" unit test no longer relies on
  9418. OpenSSL internals. Previously, it relied on unsupported OpenSSL
  9419. behavior in a way that caused it to crash with OpenSSL 1.0.2p.
  9420. Fixes bug 27226; bugfix on 0.2.5.1-alpha.
  9421. o Minor bugfixes (v3 onion services, backport from 0.3.4.6-rc):
  9422. - Stop sending ed25519 link specifiers in v3 onion service introduce
  9423. cells and descriptors, when the rendezvous or introduction point
  9424. doesn't support ed25519 link authentication. Fixes bug 26627;
  9425. bugfix on 0.3.2.4-alpha.
  9426. o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
  9427. - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
  9428. 27185; bugfix on 0.2.2.2-alpha.
  9429. Changes in version 0.3.4.8 - 2018-09-10
  9430. Tor 0.3.4.8 is the first stable release in its series; it includes
  9431. compilation and portability fixes.
  9432. The Tor 0.3.4 series includes improvements for running Tor in
  9433. low-power and embedded environments, which should help performance in
  9434. general. We've begun work on better modularity, and included preliminary
  9435. changes on the directory authority side to accommodate a new bandwidth
  9436. measurement system. We've also integrated more continuous-integration
  9437. systems into our development process, and made corresponding changes to
  9438. Tor's testing infrastructure. Finally, we've continued to refine
  9439. our anti-denial-of-service code.
  9440. Below are the changes since 0.3.4.7-rc. For a complete list of changes
  9441. since 0.3.3.9, see the ReleaseNotes file.
  9442. o Minor features (compatibility):
  9443. - Tell OpenSSL to maintain backward compatibility with previous
  9444. RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
  9445. ciphers are disabled by default. Closes ticket 27344.
  9446. o Minor features (continuous integration):
  9447. - Log the compiler path and version during Appveyor builds.
  9448. Implements ticket 27449.
  9449. - Show config.log and test-suite.log after failed Appveyor builds.
  9450. Also upload the zipped full logs as a build artifact. Implements
  9451. ticket 27430.
  9452. o Minor bugfixes (compilation):
  9453. - Silence a spurious compiler warning on the GetAdaptersAddresses
  9454. function pointer cast. This issue is already fixed by 26481 in
  9455. 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
  9456. bugfix on 0.2.3.11-alpha.
  9457. - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
  9458. supported, and always fails. Some compilers warn about the
  9459. function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
  9460. on 0.2.2.23-alpha.
  9461. o Minor bugfixes (continuous integration):
  9462. - Disable gcc hardening in Appveyor Windows 64-bit builds. As of
  9463. August 29 2018, Appveyor images come with gcc 8.2.0 by default.
  9464. Executables compiled for 64-bit Windows with this version of gcc
  9465. crash when Tor's --enable-gcc-hardening flag is set. Fixes bug
  9466. 27460; bugfix on 0.3.4.1-alpha.
  9467. - When a Travis build fails, and showing a log fails, keep trying to
  9468. show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
  9469. - When we use echo in Travis, don't pass a --flag as the first
  9470. argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
  9471. o Minor bugfixes (onion services):
  9472. - Silence a spurious compiler warning in
  9473. rend_client_send_introduction(). Fixes bug 27463; bugfix
  9474. on 0.1.1.2-alpha.
  9475. o Minor bugfixes (testing, chutney):
  9476. - When running make test-network-all, use the mixed+hs-v2 network.
  9477. (A previous fix to chutney removed v3 onion services from the
  9478. mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
  9479. confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
  9480. - Before running make test-network-all, delete old logs and test
  9481. result files, to avoid spurious failures. Fixes bug 27295; bugfix
  9482. on 0.2.7.3-rc.
  9483. Changes in version 0.3.4.7-rc - 2018-08-24
  9484. Tor 0.3.4.7-rc fixes several small compilation, portability, and
  9485. correctness issues in previous versions of Tor. This version is a
  9486. release candidate: if no serious bugs are found, we expect that the
  9487. stable 0.3.4 release will be (almost) the same as this release.
  9488. o Minor features (bug workaround):
  9489. - Compile correctly on systems that provide the C11 stdatomic.h
  9490. header, but where C11 atomic functions don't actually compile.
  9491. Closes ticket 26779; workaround for Debian issue 903709.
  9492. o Minor features (continuous integration):
  9493. - Backport Travis rust distcheck to 0.3.3. Closes ticket 24629.
  9494. - Enable macOS builds in our Travis CI configuration. Closes
  9495. ticket 24629.
  9496. - Install libcap-dev and libseccomp2-dev so these optional
  9497. dependencies get tested on Travis CI. Closes ticket 26560.
  9498. - Only post Appveyor IRC notifications when the build fails.
  9499. Implements ticket 27275.
  9500. - Run asciidoc during Travis CI. Implements ticket 27087.
  9501. - Use ccache in our Travis CI configuration. Closes ticket 26952.
  9502. o Minor features (continuous integration, rust):
  9503. - Use cargo cache in our Travis CI configuration. Closes
  9504. ticket 26952.
  9505. o Minor features (directory authorities):
  9506. - Authorities no longer vote to make the subprotocol version
  9507. "LinkAuth=1" a requirement: it is unsupportable with NSS, and
  9508. hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
  9509. o Minor features (geoip):
  9510. - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
  9511. Country database. Closes ticket 27089.
  9512. o Minor bugfixes (compilation, windows):
  9513. - Don't link or search for pthreads when building for Windows, even
  9514. if we are using build environment (like mingw) that provides a
  9515. pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
  9516. o Minor bugfixes (continuous integration):
  9517. - Improve Appveyor CI IRC logging. Generate correct branches and
  9518. URLs for pull requests and tags. Use unambiguous short commits.
  9519. Fixes bug 26979; bugfix on master.
  9520. - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
  9521. - Pass the module flags to distcheck configure, and log the flags
  9522. before running configure. (Backported to 0.2.9 and later as a
  9523. precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
  9524. o Minor bugfixes (in-process restart):
  9525. - Always call tor_free_all() when leaving tor_run_main(). When we
  9526. did not, restarting tor in-process would cause an assertion
  9527. failure. Fixes bug 26948; bugfix on 0.3.3.1-alpha.
  9528. o Minor bugfixes (linux seccomp2 sandbox):
  9529. - Fix a bug in out sandboxing rules for the openat() syscall.
  9530. Previously, no openat() call would be permitted, which would break
  9531. filesystem operations on recent glibc versions. Fixes bug 25440;
  9532. bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
  9533. o Minor bugfixes (onion services):
  9534. - Fix bug that causes services to not ever rotate their descriptors
  9535. if they were getting SIGHUPed often. Fixes bug 26932; bugfix
  9536. on 0.3.2.1-alpha.
  9537. o Minor bugfixes (portability):
  9538. - Fix compilation of the unit tests on GNU/Hurd, which does not
  9539. define PATH_MAX. Fixes bug 26873; bugfix on 0.3.3.1-alpha. Patch
  9540. from "paulusASol".
  9541. o Minor bugfixes (rust):
  9542. - Backport test_rust.sh from master. Fixes bug 26497; bugfix
  9543. on 0.3.1.5-alpha.
  9544. - Consistently use ../../.. as a fallback for $abs_top_srcdir in
  9545. test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha.
  9546. - Protover parsing was accepting the presence of whitespace in
  9547. version strings, which the C implementation would choke on, e.g.
  9548. "Desc=1\t,2". Fixes bug 27177; bugfix on 0.3.3.5-rc.
  9549. - Protover parsing was ignoring a 2nd hyphen and everything after
  9550. it, accepting entries like "Link=1-5-foo". Fixes bug 27164; bugfix
  9551. on 0.3.3.1-alpha.
  9552. - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or
  9553. $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha.
  9554. - cd to ${abs_top_builddir}/src/rust before running cargo in
  9555. src/test/test_rust.sh. This makes the working directory consistent
  9556. between builds and tests. Fixes bug 26497; bugfix on 0.3.3.2-alpha.
  9557. o Minor bugfixes (testing, bootstrap):
  9558. - When calculating bootstrap progress, check exit policies and the
  9559. exit flag. Previously, Tor would only check the exit flag, which
  9560. caused race conditions in small and fast networks like chutney.
  9561. Fixes bug 27236; bugfix on 0.2.6.3-alpha.
  9562. o Minor bugfixes (testing, openssl compatibility):
  9563. - Our "tortls/cert_matches_key" unit test no longer relies on
  9564. OpenSSL internals. Previously, it relied on unsupported OpenSSL
  9565. behavior in a way that caused it to crash with OpenSSL 1.0.2p.
  9566. Fixes bug 27226; bugfix on 0.2.5.1-alpha.
  9567. o Minor bugfixes (Windows, compilation):
  9568. - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
  9569. 27185; bugfix on 0.2.2.2-alpha.
  9570. Changes in version 0.3.4.6-rc - 2018-08-06
  9571. Tor 0.3.4.6-rc fixes several small compilation, portability, and
  9572. correctness issues in previous versions of Tor. This version is a
  9573. release candidate: if no serious bugs are found, we expect that the
  9574. stable 0.3.4 release will be (almost) the same as this release.
  9575. o Major bugfixes (event scheduler):
  9576. - When we enable a periodic event, schedule it in the event loop
  9577. rather than running it immediately. Previously, we would re-run
  9578. periodic events immediately in the middle of (for example)
  9579. changing our options, with unpredictable effects. Fixes bug 27003;
  9580. bugfix on 0.3.4.1-alpha.
  9581. o Minor features (compilation):
  9582. - When building Tor, prefer to use Python 3 over Python 2, and more
  9583. recent (contemplated) versions over older ones. Closes
  9584. ticket 26372.
  9585. - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
  9586. tell the compiler not to include the system malloc implementation.
  9587. Fixes bug 20424; bugfix on 0.2.0.20-rc.
  9588. - Don't try to use a pragma to temporarily disable the
  9589. -Wunused-const-variable warning if the compiler doesn't support
  9590. it. Fixes bug 26785; bugfix on 0.3.2.11.
  9591. o Minor bugfixes (continuous integration):
  9592. - Skip a pair of unreliable key generation tests on Windows, until
  9593. the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
  9594. bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
  9595. o Minor features (controller):
  9596. - The control port now exposes the list of HTTPTunnelPorts and
  9597. ExtOrPorts via GETINFO net/listeners/httptunnel and
  9598. net/listeners/extor respectively. Closes ticket 26647.
  9599. o Minor bugfixes (directory authority):
  9600. - When voting for recommended versions, make sure that all of the
  9601. versions are well-formed and parsable. Fixes bug 26485; bugfix
  9602. on 0.1.1.6-alpha.
  9603. o Minor features (geoip):
  9604. - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
  9605. Country database. Closes ticket 26674.
  9606. o Minor features (Rust, portability):
  9607. - Rust cross-compilation is now supported. Closes ticket 25895.
  9608. o Minor bugfixes (compilation):
  9609. - Update build system so that tor builds again with --disable-unittests
  9610. after recent refactoring. Fixes bug 26789; bugfix on 0.3.4.3-alpha.
  9611. - Fix a compilation warning on some versions of GCC when building
  9612. code that calls routerinfo_get_my_routerinfo() twice, assuming
  9613. that the second call will succeed if the first one did. Fixes bug
  9614. 26269; bugfix on 0.2.8.2-alpha.
  9615. o Minor bugfixes (controller):
  9616. - Report the port correctly when a port is configured to bind to
  9617. "auto". Fixes bug 26568; bugfix on 0.3.4.1-alpha.
  9618. - Parse the "HSADDRESS=" parameter in HSPOST commands properly.
  9619. Previously, it was misparsed and ignored. Fixes bug 26523; bugfix
  9620. on 0.3.3.1-alpha. Patch by "akwizgran".
  9621. o Minor bugfixes (correctness, flow control):
  9622. - Upon receiving a stream-level SENDME cell, verify that our window
  9623. has not grown too large. Fixes bug 26214; bugfix on svn
  9624. r54 (pre-0.0.1).
  9625. o Minor bugfixes (memory, correctness):
  9626. - Fix a number of small memory leaks identified by coverity. Fixes
  9627. bug 26467; bugfix on numerous Tor versions.
  9628. o Minor bugfixes (logging):
  9629. - Improve the log message when connection initiators fail to
  9630. authenticate direct connections to relays. Fixes bug 26927; bugfix
  9631. on 0.3.0.1-alpha.
  9632. o Minor bugfixes (portability):
  9633. - Avoid a compilation error in test_bwmgt.c on Solaris 10. Fixes bug
  9634. 26994; bugfix on 0.3.4.1-alpha.
  9635. - Work around two different bugs in the OS X 10.10 and later SDKs
  9636. that would prevent us from successfully targeting earlier versions
  9637. of OS X. Fixes bug 26876; bugfix on 0.3.3.1-alpha.
  9638. o Minor bugfixes (single onion services, Tor2web):
  9639. - Log a protocol warning when single onion services or Tor2web
  9640. clients fail to authenticate direct connections to relays. Fixes
  9641. bug 26924; bugfix on 0.2.9.1-alpha.
  9642. o Minor bugfixes (testing):
  9643. - Disable core dumps in test_bt.sh, to avoid failures in "make
  9644. distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
  9645. o Minor bugfixes (testing, compatibility):
  9646. - When running the ntor_ref.py and hs_ntor_ref.py tests, make sure
  9647. only to pass strings (rather than "bytes" objects) to the Python
  9648. subprocess module. Python 3 on Windows seems to require this.
  9649. Fixes bug 26535; bugfix on 0.2.5.5-alpha (for ntor_ref.py) and
  9650. 0.3.1.1-alpha (for hs_ntor_ref.py).
  9651. o Minor bugfixes (v3 onion services):
  9652. - Stop sending ed25519 link specifiers in v3 onion service introduce
  9653. cells and descriptors, when the rendezvous or introduction point
  9654. doesn't support ed25519 link authentication. Fixes bug 26627;
  9655. bugfix on 0.3.2.4-alpha.
  9656. Changes in version 0.3.4.5-rc - 2018-07-13
  9657. Tor 0.3.4.5-rc moves to a new bridge authority, meaning people running
  9658. bridge relays should upgrade.
  9659. o Directory authority changes:
  9660. - The "Bifroest" bridge authority has been retired; the new bridge
  9661. authority is "Serge", and it is operated by George from the
  9662. TorBSD project. Closes ticket 26771.
  9663. Changes in version 0.3.3.9 - 2018-07-13
  9664. Tor 0.3.3.9 moves to a new bridge authority, meaning people running
  9665. bridge relays should upgrade.
  9666. o Directory authority changes:
  9667. - The "Bifroest" bridge authority has been retired; the new bridge
  9668. authority is "Serge", and it is operated by George from the
  9669. TorBSD project. Closes ticket 26771.
  9670. Changes in version 0.3.2.11 - 2018-07-13
  9671. Tor 0.3.2.11 moves to a new bridge authority, meaning people running
  9672. bridge relays should upgrade. We also take this opportunity to backport
  9673. other minor fixes.
  9674. o Directory authority changes:
  9675. - The "Bifroest" bridge authority has been retired; the new bridge
  9676. authority is "Serge", and it is operated by George from the
  9677. TorBSD project. Closes ticket 26771.
  9678. o Directory authority changes (backport from 0.3.3.7):
  9679. - Add an IPv6 address for the "dannenberg" directory authority.
  9680. Closes ticket 26343.
  9681. o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha):
  9682. - When directory authorities read a zero-byte bandwidth file, they
  9683. would previously log a warning with the contents of an
  9684. uninitialised buffer. They now log a warning about the empty file
  9685. instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
  9686. o Major bugfixes (onion service, backport from 0.3.4.1-alpha):
  9687. - Correctly detect when onion services get disabled after HUP. Fixes
  9688. bug 25761; bugfix on 0.3.2.1.
  9689. o Minor features (sandbox, backport from 0.3.3.4-alpha):
  9690. - Explicitly permit the poll() system call when the Linux
  9691. seccomp2-based sandbox is enabled: apparently, some versions of
  9692. libc use poll() when calling getpwnam(). Closes ticket 25313.
  9693. o Minor feature (continuous integration, backport from 0.3.3.5-rc):
  9694. - Update the Travis CI configuration to use the stable Rust channel,
  9695. now that we have decided to require that. Closes ticket 25714.
  9696. o Minor features (continuous integration, backport from 0.3.4.1-alpha):
  9697. - Our .travis.yml configuration now includes support for testing the
  9698. results of "make distcheck". (It's not uncommon for "make check"
  9699. to pass but "make distcheck" to fail.) Closes ticket 25814.
  9700. - Our Travis CI configuration now integrates with the Coveralls
  9701. coverage analysis tool. Closes ticket 25818.
  9702. o Minor features (relay, diagnostic, backport from 0.3.4.3-alpha):
  9703. - Add several checks to detect whether Tor relays are uploading
  9704. their descriptors without specifying why they regenerated them.
  9705. Diagnostic for ticket 25686.
  9706. o Minor features (compilation, backport from 0.3.4.4-rc):
  9707. - When building Tor, prefer to use Python 3 over Python 2, and more
  9708. recent (contemplated) versions over older ones. Closes
  9709. ticket 26372.
  9710. o Minor features (geoip):
  9711. - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
  9712. Country database. Closes ticket 26674.
  9713. o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha):
  9714. - Upon receiving a malformed connected cell, stop processing the
  9715. cell immediately. Previously we would mark the connection for
  9716. close, but continue processing the cell as if the connection were
  9717. open. Fixes bug 26072; bugfix on 0.2.4.7-alpha.
  9718. o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha):
  9719. - Allow the nanosleep() system call, which glibc uses to implement
  9720. sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
  9721. o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc):
  9722. - When running the hs_ntor_ref.py test, make sure only to pass
  9723. strings (rather than "bytes" objects) to the Python subprocess
  9724. module. Python 3 on Windows seems to require this. Fixes bug
  9725. 26535; bugfix on 0.3.1.1-alpha.
  9726. - When running the ntor_ref.py test, make sure only to pass strings
  9727. (rather than "bytes" objects) to the Python subprocess module.
  9728. Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
  9729. on 0.2.5.5-alpha.
  9730. o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha):
  9731. - Work around a change in OpenSSL 1.1.1 where return values that
  9732. would previously indicate "no password" now indicate an empty
  9733. password. Without this workaround, Tor instances running with
  9734. OpenSSL 1.1.1 would accept descriptors that other Tor instances
  9735. would reject. Fixes bug 26116; bugfix on 0.2.5.16.
  9736. o Minor bugfixes (documentation, backport from 0.3.3.5-rc):
  9737. - Document that the PerConnBW{Rate,Burst} options will fall back to
  9738. their corresponding consensus parameters only if those parameters
  9739. are set. Previously we had claimed that these values would always
  9740. be set in the consensus. Fixes bug 25296; bugfix on 0.2.2.7-alpha.
  9741. o Minor bugfixes (compilation, backport from 0.3.4.4-rc):
  9742. - Fix a compilation warning on some versions of GCC when building
  9743. code that calls routerinfo_get_my_routerinfo() twice, assuming
  9744. that the second call will succeed if the first one did. Fixes bug
  9745. 26269; bugfix on 0.2.8.2-alpha.
  9746. o Minor bugfixes (client, backport from 0.3.4.1-alpha):
  9747. - Don't consider Tor running as a client if the ControlPort is open,
  9748. but no actual client ports are open. Fixes bug 26062; bugfix
  9749. on 0.2.9.4-alpha.
  9750. o Minor bugfixes (hardening, backport from 0.3.4.2-alpha):
  9751. - Prevent a possible out-of-bounds smartlist read in
  9752. protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
  9753. o Minor bugfixes (C correctness, backport from 0.3.3.4-alpha):
  9754. - Fix a very unlikely (impossible, we believe) null pointer
  9755. dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by
  9756. Coverity; this is CID 1430932.
  9757. o Minor bugfixes (onion service, backport from 0.3.4.1-alpha):
  9758. - Fix a memory leak when a v3 onion service is configured and gets a
  9759. SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha.
  9760. - When parsing the descriptor signature, look for the token plus an
  9761. extra white-space at the end. This is more correct but also will
  9762. allow us to support new fields that might start with "signature".
  9763. Fixes bug 26069; bugfix on 0.3.0.1-alpha.
  9764. o Minor bugfixes (relay, backport from 0.3.4.3-alpha):
  9765. - Relays now correctly block attempts to re-extend to the previous
  9766. relay by Ed25519 identity. Previously they would warn in this
  9767. case, but not actually reject the attempt. Fixes bug 26158; bugfix
  9768. on 0.3.0.1-alpha.
  9769. o Minor bugfixes (relay, crash, backport from 0.3.4.1-alpha):
  9770. - Avoid a crash when running with DirPort set but ORPort turned off.
  9771. Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha.
  9772. o Minor bugfixes (compilation, backport from 0.3.4.2-alpha):
  9773. - Silence unused-const-variable warnings in zstd.h with some GCC
  9774. versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha.
  9775. o Minor bugfixes (testing, backport from 0.3.3.4-alpha):
  9776. - Avoid intermittent test failures due to a test that had relied on
  9777. onion service introduction point creation finishing within 5
  9778. seconds of real clock time. Fixes bug 25450; bugfix
  9779. on 0.3.1.3-alpha.
  9780. o Minor bugfixes (compilation, backport from 0.3.3.4-alpha):
  9781. - Fix a C99 compliance issue in our configuration script that caused
  9782. compilation issues when compiling Tor with certain versions of
  9783. xtools. Fixes bug 25474; bugfix on 0.3.2.5-alpha.
  9784. o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc):
  9785. - Fix a number of small memory leaks identified by coverity. Fixes
  9786. bug 26467; bugfix on numerous Tor versions.
  9787. o Code simplification and refactoring (backport from 0.3.3.5-rc):
  9788. - Move the list of default directory authorities to its own file.
  9789. Closes ticket 24854. Patch by "beastr0".
  9790. Changes in version 0.2.9.16 - 2018-07-13
  9791. Tor 0.2.9.16 moves to a new bridge authority, meaning people running
  9792. bridge relays should upgrade. We also take this opportunity to backport
  9793. other minor fixes.
  9794. o Directory authority changes:
  9795. - The "Bifroest" bridge authority has been retired; the new bridge
  9796. authority is "Serge", and it is operated by George from the
  9797. TorBSD project. Closes ticket 26771.
  9798. o Directory authority changes (backport from 0.3.3.7):
  9799. - Add an IPv6 address for the "dannenberg" directory authority.
  9800. Closes ticket 26343.
  9801. o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha):
  9802. - When directory authorities read a zero-byte bandwidth file, they
  9803. would previously log a warning with the contents of an
  9804. uninitialised buffer. They now log a warning about the empty file
  9805. instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
  9806. o Minor features (sandbox, backport from 0.3.3.4-alpha):
  9807. - Explicitly permit the poll() system call when the Linux
  9808. seccomp2-based sandbox is enabled: apparently, some versions of
  9809. libc use poll() when calling getpwnam(). Closes ticket 25313.
  9810. o Minor features (continuous integration, backport from 0.3.4.1-alpha):
  9811. - Our .travis.yml configuration now includes support for testing the
  9812. results of "make distcheck". (It's not uncommon for "make check"
  9813. to pass but "make distcheck" to fail.) Closes ticket 25814.
  9814. - Our Travis CI configuration now integrates with the Coveralls
  9815. coverage analysis tool. Closes ticket 25818.
  9816. o Minor features (compilation, backport from 0.3.4.4-rc):
  9817. - When building Tor, prefer to use Python 3 over Python 2, and more
  9818. recent (contemplated) versions over older ones. Closes
  9819. ticket 26372.
  9820. o Minor features (geoip):
  9821. - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
  9822. Country database. Closes ticket 26674.
  9823. o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha):
  9824. - Upon receiving a malformed connected cell, stop processing the
  9825. cell immediately. Previously we would mark the connection for
  9826. close, but continue processing the cell as if the connection were
  9827. open. Fixes bug 26072; bugfix on 0.2.4.7-alpha.
  9828. o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha):
  9829. - Allow the nanosleep() system call, which glibc uses to implement
  9830. sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
  9831. o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc):
  9832. - When running the ntor_ref.py test, make sure only to pass strings
  9833. (rather than "bytes" objects) to the Python subprocess module.
  9834. Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
  9835. on 0.2.5.5-alpha.
  9836. o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha):
  9837. - Work around a change in OpenSSL 1.1.1 where return values that
  9838. would previously indicate "no password" now indicate an empty
  9839. password. Without this workaround, Tor instances running with
  9840. OpenSSL 1.1.1 would accept descriptors that other Tor instances
  9841. would reject. Fixes bug 26116; bugfix on 0.2.5.16.
  9842. o Minor bugfixes (compilation, backport from 0.3.4.4-rc):
  9843. - Fix a compilation warning on some versions of GCC when building
  9844. code that calls routerinfo_get_my_routerinfo() twice, assuming
  9845. that the second call will succeed if the first one did. Fixes bug
  9846. 26269; bugfix on 0.2.8.2-alpha.
  9847. o Minor bugfixes (client, backport from 0.3.4.1-alpha):
  9848. - Don't consider Tor running as a client if the ControlPort is open,
  9849. but no actual client ports are open. Fixes bug 26062; bugfix
  9850. on 0.2.9.4-alpha.
  9851. o Minor bugfixes (hardening, backport from 0.3.4.2-alpha):
  9852. - Prevent a possible out-of-bounds smartlist read in
  9853. protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
  9854. o Minor bugfixes (C correctness, backport from 0.3.3.4-alpha):
  9855. - Fix a very unlikely (impossible, we believe) null pointer
  9856. dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by
  9857. Coverity; this is CID 1430932.
  9858. o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc):
  9859. - Fix a number of small memory leaks identified by coverity. Fixes
  9860. bug 26467; bugfix on numerous Tor versions.
  9861. o Code simplification and refactoring (backport from 0.3.3.5-rc):
  9862. - Move the list of default directory authorities to its own file.
  9863. Closes ticket 24854. Patch by "beastr0".
  9864. Changes in version 0.3.4.4-rc - 2018-07-09
  9865. Tor 0.3.4.4-rc fixes several small compilation, portability, and
  9866. correctness issues in previous versions of Tor. This version is a
  9867. release candidate: if no serious bugs are found, we expect that the
  9868. stable 0.3.4 release will be (almost) the same as this release.
  9869. o Minor features (compilation):
  9870. - When building Tor, prefer to use Python 3 over Python 2, and more
  9871. recent (contemplated) versions over older ones. Closes
  9872. ticket 26372.
  9873. o Minor features (geoip):
  9874. - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
  9875. Country database. Closes ticket 26674.
  9876. o Minor features (Rust, portability):
  9877. - Rust cross-compilation is now supported. Closes ticket 25895.
  9878. o Minor bugfixes (compilation):
  9879. - Fix a compilation warning on some versions of GCC when building
  9880. code that calls routerinfo_get_my_routerinfo() twice, assuming
  9881. that the second call will succeed if the first one did. Fixes bug
  9882. 26269; bugfix on 0.2.8.2-alpha.
  9883. o Minor bugfixes (control port):
  9884. - Report the port correctly when a port is configured to bind to
  9885. "auto". Fixes bug 26568; bugfix on 0.3.4.1-alpha.
  9886. - Handle the HSADDRESS= argument to the HSPOST command properly.
  9887. (Previously, this argument was misparsed and thus ignored.) Fixes
  9888. bug 26523; bugfix on 0.3.3.1-alpha. Patch by "akwizgran".
  9889. o Minor bugfixes (correctness, flow control):
  9890. - Upon receiving a stream-level SENDME cell, verify that our window
  9891. has not grown too large. Fixes bug 26214; bugfix on svn
  9892. r54 (pre-0.0.1).
  9893. o Minor bugfixes (memory, correctness):
  9894. - Fix a number of small memory leaks identified by coverity. Fixes
  9895. bug 26467; bugfix on numerous Tor versions.
  9896. o Minor bugfixes (testing, compatibility):
  9897. - When running the hs_ntor_ref.py test, make sure only to pass
  9898. strings (rather than "bytes" objects) to the Python subprocess
  9899. module. Python 3 on Windows seems to require this. Fixes bug
  9900. 26535; bugfix on 0.3.1.1-alpha.
  9901. - When running the ntor_ref.py test, make sure only to pass strings
  9902. (rather than "bytes" objects) to the Python subprocess module.
  9903. Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
  9904. on 0.2.5.5-alpha.
  9905. Changes in version 0.3.3.8 - 2018-07-09
  9906. Tor 0.3.3.8 backports several changes from the 0.3.4.x series, including
  9907. fixes for a memory leak affecting directory authorities.
  9908. o Major bugfixes (directory authority, backport from 0.3.4.3-alpha):
  9909. - Stop leaking memory on directory authorities when planning to
  9910. vote. This bug was crashing authorities by exhausting their
  9911. memory. Fixes bug 26435; bugfix on 0.3.3.6.
  9912. o Major bugfixes (rust, testing, backport from 0.3.4.3-alpha):
  9913. - Make sure that failing tests in Rust will actually cause the build
  9914. to fail: previously, they were ignored. Fixes bug 26258; bugfix
  9915. on 0.3.3.4-alpha.
  9916. o Minor features (compilation, backport from 0.3.4.4-rc):
  9917. - When building Tor, prefer to use Python 3 over Python 2, and more
  9918. recent (contemplated) versions over older ones. Closes
  9919. ticket 26372.
  9920. o Minor features (geoip):
  9921. - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
  9922. Country database. Closes ticket 26674.
  9923. o Minor features (relay, diagnostic, backport from 0.3.4.3-alpha):
  9924. - Add several checks to detect whether Tor relays are uploading
  9925. their descriptors without specifying why they regenerated them.
  9926. Diagnostic for ticket 25686.
  9927. o Minor bugfixes (circuit path selection, backport from 0.3.4.1-alpha):
  9928. - Don't count path selection failures as circuit build failures.
  9929. This change should eliminate cases where Tor blames its guard or
  9930. the network for situations like insufficient microdescriptors
  9931. and/or overly restrictive torrc settings. Fixes bug 25705; bugfix
  9932. on 0.3.3.1-alpha.
  9933. o Minor bugfixes (compilation, backport from 0.3.4.4-rc):
  9934. - Fix a compilation warning on some versions of GCC when building
  9935. code that calls routerinfo_get_my_routerinfo() twice, assuming
  9936. that the second call will succeed if the first one did. Fixes bug
  9937. 26269; bugfix on 0.2.8.2-alpha.
  9938. o Minor bugfixes (control port, backport from 0.3.4.4-rc):
  9939. - Handle the HSADDRESS= argument to the HSPOST command properly.
  9940. (Previously, this argument was misparsed and thus ignored.) Fixes
  9941. bug 26523; bugfix on 0.3.3.1-alpha. Patch by "akwizgran".
  9942. o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc):
  9943. - Fix a number of small memory leaks identified by coverity. Fixes
  9944. bug 26467; bugfix on numerous Tor versions.
  9945. o Minor bugfixes (relay, backport from 0.3.4.3-alpha):
  9946. - Relays now correctly block attempts to re-extend to the previous
  9947. relay by Ed25519 identity. Previously they would warn in this
  9948. case, but not actually reject the attempt. Fixes bug 26158; bugfix
  9949. on 0.3.0.1-alpha.
  9950. o Minor bugfixes (restart-in-process, backport from 0.3.4.1-alpha):
  9951. - When shutting down, Tor now clears all the flags in the control.c
  9952. module. This should prevent a bug where authentication cookies are
  9953. not generated on restart. Fixes bug 25512; bugfix on 0.3.3.1-alpha.
  9954. o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc):
  9955. - When running the hs_ntor_ref.py test, make sure only to pass
  9956. strings (rather than "bytes" objects) to the Python subprocess
  9957. module. Python 3 on Windows seems to require this. Fixes bug
  9958. 26535; bugfix on 0.3.1.1-alpha.
  9959. - When running the ntor_ref.py test, make sure only to pass strings
  9960. (rather than "bytes" objects) to the Python subprocess module.
  9961. Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
  9962. on 0.2.5.5-alpha.
  9963. Changes in version 0.3.4.3-alpha - 2018-06-26
  9964. Tor 0.3.4.3-alpha fixes several bugs in earlier versions, including
  9965. one that was causing stability issues on directory authorities.
  9966. o Major bugfixes (directory authority):
  9967. - Stop leaking memory on directory authorities when planning to
  9968. vote. This bug was crashing authorities by exhausting their
  9969. memory. Fixes bug 26435; bugfix on 0.3.3.6.
  9970. o Major bugfixes (rust, testing):
  9971. - Make sure that failing tests in Rust will actually cause the build
  9972. to fail: previously, they were ignored. Fixes bug 26258; bugfix
  9973. on 0.3.3.4-alpha.
  9974. o Minor feature (directory authorities):
  9975. - Stop warning about incomplete bw lines before the first complete
  9976. bw line has been found, so that additional header lines can be
  9977. ignored. Fixes bug 25960; bugfix on 0.2.2.1-alpha
  9978. o Minor features (relay, diagnostic):
  9979. - Add several checks to detect whether Tor relays are uploading
  9980. their descriptors without specifying why they regenerated them.
  9981. Diagnostic for ticket 25686.
  9982. o Minor features (unit tests):
  9983. - Test complete bandwidth measurements files, and test that
  9984. incomplete bandwidth lines only give warnings when the end of the
  9985. header has not been detected. Fixes bug 25947; bugfix
  9986. on 0.2.2.1-alpha
  9987. o Minor bugfixes (compilation):
  9988. - Refrain from compiling unit testing related object files when
  9989. --disable-unittests is set to configure script. Fixes bug 24891;
  9990. bugfix on 0.2.5.1-alpha.
  9991. - When linking the libtor_testing.a library, only include the
  9992. dirauth object files once. Previously, they were getting added
  9993. twice. Fixes bug 26402; bugfix on 0.3.4.1-alpha.
  9994. - The --enable-fatal-warnings flag now affects Rust code as well.
  9995. Closes ticket 26245.
  9996. o Minor bugfixes (onion services):
  9997. - Recompute some consensus information after detecting a clock jump,
  9998. or after transitioning from a non-live consensus to a live
  9999. consensus. We do this to avoid having an outdated state, and
  10000. miscalculating the index for next-generation onion services. Fixes
  10001. bug 24977; bugfix on 0.3.2.1-alpha.
  10002. o Minor bugfixes (relay):
  10003. - Relays now correctly block attempts to re-extend to the previous
  10004. relay by Ed25519 identity. Previously they would warn in this
  10005. case, but not actually reject the attempt. Fixes bug 26158; bugfix
  10006. on 0.3.0.1-alpha.
  10007. o Minor bugfixes (testing):
  10008. - Fix compilation of the doctests in the Rust crypto crate. Fixes
  10009. bug 26415; bugfix on 0.3.4.1-alpha.
  10010. - Instead of trying to read the geoip configuration files from
  10011. within the unit tests, instead create our own ersatz files with
  10012. just enough geoip data in the format we expect. Trying to read
  10013. from the source directory created problems on Windows with mingw,
  10014. where the build system's paths are not the same as the platform's
  10015. paths. Fixes bug 25787; bugfix on 0.3.4.1-alpha.
  10016. - Refrain from trying to get an item from an empty smartlist in
  10017. test_bridges_clear_bridge_list. Set DEBUG_SMARTLIST in unit tests
  10018. to catch improper smartlist usage. Furthermore, enable
  10019. DEBUG_SMARTLIST globally when build is configured with fragile
  10020. hardening. Fixes bug 26196; bugfix on 0.3.4.1-alpha.
  10021. Changes in version 0.3.3.7 - 2018-06-12
  10022. Tor 0.3.3.7 backports several changes from the 0.3.4.x series, including
  10023. fixes for bugs affecting compatibility and stability.
  10024. o Directory authority changes:
  10025. - Add an IPv6 address for the "dannenberg" directory authority.
  10026. Closes ticket 26343.
  10027. o Minor features (geoip):
  10028. - Update geoip and geoip6 to the June 7 2018 Maxmind GeoLite2
  10029. Country database. Closes ticket 26351.
  10030. o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha):
  10031. - Work around a change in OpenSSL 1.1.1 where return values that
  10032. would previously indicate "no password" now indicate an empty
  10033. password. Without this workaround, Tor instances running with
  10034. OpenSSL 1.1.1 would accept descriptors that other Tor instances
  10035. would reject. Fixes bug 26116; bugfix on 0.2.5.16.
  10036. o Minor bugfixes (compilation, backport from 0.3.4.2-alpha):
  10037. - Silence unused-const-variable warnings in zstd.h with some GCC
  10038. versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha.
  10039. o Minor bugfixes (controller, backport from 0.3.4.2-alpha):
  10040. - Improve accuracy of the BUILDTIMEOUT_SET control port event's
  10041. TIMEOUT_RATE and CLOSE_RATE fields. (We were previously
  10042. miscounting the total number of circuits for these field values.)
  10043. Fixes bug 26121; bugfix on 0.3.3.1-alpha.
  10044. o Minor bugfixes (hardening, backport from 0.3.4.2-alpha):
  10045. - Prevent a possible out-of-bounds smartlist read in
  10046. protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
  10047. o Minor bugfixes (path selection, backport from 0.3.4.1-alpha):
  10048. - Only select relays when they have the descriptors we prefer to use
  10049. for them. This change fixes a bug where we could select a relay
  10050. because it had _some_ descriptor, but reject it later with a
  10051. nonfatal assertion error because it didn't have the exact one we
  10052. wanted. Fixes bugs 25691 and 25692; bugfix on 0.3.3.4-alpha.
  10053. Changes in version 0.3.4.2-alpha - 2018-06-12
  10054. Tor 0.3.4.2-alpha fixes several minor bugs in the previous alpha
  10055. release, and forward-ports an authority-only security fix from 0.3.3.6.
  10056. o Directory authority changes:
  10057. - Add an IPv6 address for the "dannenberg" directory authority.
  10058. Closes ticket 26343.
  10059. o Major bugfixes (security, directory authority, denial-of-service, also in 0.3.3.6):
  10060. - Fix a bug that could have allowed an attacker to force a directory
  10061. authority to use up all its RAM by passing it a maliciously
  10062. crafted protocol versions string. Fixes bug 25517; bugfix on
  10063. 0.2.9.4-alpha. This issue is also tracked as TROVE-2018-005.
  10064. o Minor features (continuous integration):
  10065. - Add the necessary configuration files for continuous integration
  10066. testing on Windows, via the Appveyor platform. Closes ticket
  10067. 25549. Patches from Marcin Cieślak and Isis Lovecruft.
  10068. o Minor features (geoip):
  10069. - Update geoip and geoip6 to the June 7 2018 Maxmind GeoLite2
  10070. Country database. Closes ticket 26351.
  10071. o Minor bugfixes (compatibility, openssl):
  10072. - Work around a change in OpenSSL 1.1.1 where return values that
  10073. would previously indicate "no password" now indicate an empty
  10074. password. Without this workaround, Tor instances running with
  10075. OpenSSL 1.1.1 would accept descriptors that other Tor instances
  10076. would reject. Fixes bug 26116; bugfix on 0.2.5.16.
  10077. o Minor bugfixes (compilation):
  10078. - Silence unused-const-variable warnings in zstd.h with some GCC
  10079. versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha.
  10080. - Fix compilation when using OpenSSL 1.1.0 with the "no-deprecated"
  10081. flag enabled. Fixes bug 26156; bugfix on 0.3.4.1-alpha.
  10082. - Avoid a compiler warning when casting the return value of
  10083. smartlist_len() to double with DEBUG_SMARTLIST enabled. Fixes bug
  10084. 26283; bugfix on 0.2.4.10-alpha.
  10085. o Minor bugfixes (control port):
  10086. - Do not count 0-length RELAY_COMMAND_DATA cells as valid data in
  10087. CIRC_BW events. Previously, such cells were counted entirely in
  10088. the OVERHEAD field. Now they are not. Fixes bug 26259; bugfix
  10089. on 0.3.4.1-alpha.
  10090. o Minor bugfixes (controller):
  10091. - Improve accuracy of the BUILDTIMEOUT_SET control port event's
  10092. TIMEOUT_RATE and CLOSE_RATE fields. (We were previously
  10093. miscounting the total number of circuits for these field values.)
  10094. Fixes bug 26121; bugfix on 0.3.3.1-alpha.
  10095. o Minor bugfixes (hardening):
  10096. - Prevent a possible out-of-bounds smartlist read in
  10097. protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
  10098. o Minor bugfixes (onion services):
  10099. - Fix a bug that blocked the creation of ephemeral v3 onion
  10100. services. Fixes bug 25939; bugfix on 0.3.4.1-alpha.
  10101. o Minor bugfixes (test coverage tools):
  10102. - Update our "cov-diff" script to handle output from the latest
  10103. version of gcov, and to remove extraneous timestamp information
  10104. from its output. Fixes bugs 26101 and 26102; bugfix
  10105. on 0.2.5.1-alpha.
  10106. Changes in version 0.3.3.6 - 2018-05-22
  10107. Tor 0.3.3.6 is the first stable release in the 0.3.3 series. It
  10108. backports several important fixes from the 0.3.4.1-alpha.
  10109. The Tor 0.3.3 series includes controller support and other
  10110. improvements for v3 onion services, official support for embedding Tor
  10111. within other applications, and our first non-trivial module written in
  10112. the Rust programming language. (Rust is still not enabled by default
  10113. when building Tor.) And as usual, there are numerous other smaller
  10114. bugfixes, features, and improvements.
  10115. Below are the changes since 0.3.3.5-rc. For a list of all changes
  10116. since 0.3.2.10, see the ReleaseNotes file.
  10117. o Major bugfixes (directory authorities, security, backport from 0.3.4.1-alpha):
  10118. - When directory authorities read a zero-byte bandwidth file, they
  10119. would previously log a warning with the contents of an
  10120. uninitialised buffer. They now log a warning about the empty file
  10121. instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
  10122. o Major bugfixes (security, directory authority, denial-of-service):
  10123. - Fix a bug that could have allowed an attacker to force a directory
  10124. authority to use up all its RAM by passing it a maliciously
  10125. crafted protocol versions string. Fixes bug 25517; bugfix on
  10126. 0.2.9.4-alpha. This issue is also tracked as TROVE-2018-005.
  10127. o Major bugfixes (crash, backport from 0.3.4.1-alpha):
  10128. - Avoid a rare assertion failure in the circuit build timeout code
  10129. if we fail to allow any circuits to actually complete. Fixes bug
  10130. 25733; bugfix on 0.2.2.2-alpha.
  10131. o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha):
  10132. - Avoid a crash when testing router reachability on a router that
  10133. could have an ed25519 ID, but which does not. Fixes bug 25415;
  10134. bugfix on 0.3.3.2-alpha.
  10135. o Major bugfixes (onion service, backport from 0.3.4.1-alpha):
  10136. - Correctly detect when onion services get disabled after HUP. Fixes
  10137. bug 25761; bugfix on 0.3.2.1.
  10138. o Major bugfixes (relay, denial of service, backport from 0.3.4.1-alpha):
  10139. - Impose a limit on circuit cell queue size. The limit can be
  10140. controlled by a consensus parameter. Fixes bug 25226; bugfix
  10141. on 0.2.4.14-alpha.
  10142. o Minor features (compatibility, backport from 0.3.4.1-alpha):
  10143. - Avoid some compilation warnings with recent versions of LibreSSL.
  10144. Closes ticket 26006.
  10145. o Minor features (continuous integration, backport from 0.3.4.1-alpha):
  10146. - Our .travis.yml configuration now includes support for testing the
  10147. results of "make distcheck". (It's not uncommon for "make check"
  10148. to pass but "make distcheck" to fail.) Closes ticket 25814.
  10149. - Our Travis CI configuration now integrates with the Coveralls
  10150. coverage analysis tool. Closes ticket 25818.
  10151. o Minor features (geoip):
  10152. - Update geoip and geoip6 to the May 1 2018 Maxmind GeoLite2 Country
  10153. database. Closes ticket 26104.
  10154. o Minor bugfixes (client, backport from 0.3.4.1-alpha):
  10155. - Don't consider Tor running as a client if the ControlPort is open,
  10156. but no actual client ports are open. Fixes bug 26062; bugfix
  10157. on 0.2.9.4-alpha.
  10158. o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha):
  10159. - Upon receiving a malformed connected cell, stop processing the
  10160. cell immediately. Previously we would mark the connection for
  10161. close, but continue processing the cell as if the connection were
  10162. open. Fixes bug 26072; bugfix on 0.2.4.7-alpha.
  10163. o Minor bugfixes (documentation, backport from 0.3.4.1-alpha):
  10164. - Stop saying in the manual that clients cache ipv4 dns answers from
  10165. exit relays. We haven't used them since 0.2.6.3-alpha, and in
  10166. ticket 24050 we stopped even caching them as of 0.3.2.6-alpha, but
  10167. we forgot to say so in the man page. Fixes bug 26052; bugfix
  10168. on 0.3.2.6-alpha.
  10169. o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha):
  10170. - Allow the nanosleep() system call, which glibc uses to implement
  10171. sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
  10172. o Minor bugfixes (onion service, backport from 0.3.4.1-alpha):
  10173. - Fix a memory leak when a v3 onion service is configured and gets a
  10174. SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha.
  10175. - When parsing the descriptor signature, look for the token plus an
  10176. extra white-space at the end. This is more correct but also will
  10177. allow us to support new fields that might start with "signature".
  10178. Fixes bug 26069; bugfix on 0.3.0.1-alpha.
  10179. o Minor bugfixes (relay, crash, backport from 0.3.4.1-alpha):
  10180. - Avoid a crash when running with DirPort set but ORPort turned off.
  10181. Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha.
  10182. o Documentation (backport from 0.3.4.1-alpha):
  10183. - Correct an IPv6 error in the documentation for ExitPolicy. Closes
  10184. ticket 25857. Patch from "CTassisF".
  10185. Changes in version 0.3.4.1-alpha - 2018-05-17
  10186. Tor 0.3.4.1-alpha is the first release in the 0.3.4.x series. It
  10187. includes refactoring to begin reducing Tor's binary size and idle CPU
  10188. usage on mobile, along with prep work for new bandwidth scanners,
  10189. improvements to the experimental "vanguards" feature, and numerous
  10190. other small features and bugfixes.
  10191. o New system requirements:
  10192. - Tor no longer tries to support old operating systems without
  10193. mmap() or some local equivalent. Apparently, compilation on such
  10194. systems has been broken for some time, without anybody noticing or
  10195. complaining. Closes ticket 25398.
  10196. o Major feature (directory authority, modularization):
  10197. - The directory authority subsystem has been modularized. The code
  10198. is now located in src/or/dirauth/, and is compiled in by default.
  10199. To disable the module, the configure option
  10200. --disable-module-dirauth has been added. This module may be
  10201. disabled by default in some future release. Closes ticket 25610.
  10202. o Major features (main loop, CPU usage):
  10203. - When Tor is disabled (via DisableNetwork or via hibernation), it
  10204. no longer needs to run any per-second events. This change should
  10205. make it easier for mobile applications to disable Tor while the
  10206. device is sleeping, or Tor is not running. Closes ticket 26063.
  10207. - Tor no longer enables all of its periodic events by default.
  10208. Previously, Tor would enable all possible main loop events,
  10209. regardless of whether it needed them. Furthermore, many of these
  10210. events are now disabled with Tor is hibernating or DisableNetwork
  10211. is set. This is a big step towards reducing client CPU usage by
  10212. reducing the amount of wake-ups the daemon does. Closes ticket
  10213. 25376 and 25762.
  10214. - The bandwidth-limitation logic has been refactored so that
  10215. bandwidth calculations are performed on-demand, rather than every
  10216. TokenBucketRefillInterval milliseconds. This change should improve
  10217. the granularity of our bandwidth calculations, and limit the
  10218. number of times that the Tor process needs to wake up when it is
  10219. idle. Closes ticket 25373.
  10220. - Move responsibility for many operations from a once-per-second
  10221. callback to a callback that is only scheduled as needed. Moving
  10222. this functionality has allowed us to disable the callback when
  10223. Tor's network is disabled. Once enough items are removed from our
  10224. once-per-second callback, we can eliminate it entirely to conserve
  10225. CPU when idle. The functionality removed includes: closing
  10226. connections, circuits, and channels (ticket 25932); consensus
  10227. voting (25937); flushing log callbacks (25951); honoring delayed
  10228. SIGNEWNYM requests (25949); rescanning the consensus cache
  10229. (25931); saving the state file to disk (25948); warning relay
  10230. operators about unreachable ports (25952); and keeping track of
  10231. Tor's uptime (26009).
  10232. o Major bugfixes (directory authorities, security):
  10233. - When directory authorities read a zero-byte bandwidth file, they
  10234. would previously log a warning with the contents of an
  10235. uninitialised buffer. They now log a warning about the empty file
  10236. instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
  10237. o Major bugfixes (crash):
  10238. - Avoid a rare assertion failure in the circuit build timeout code
  10239. if we fail to allow any circuits to actually complete. Fixes bug
  10240. 25733; bugfix on 0.2.2.2-alpha.
  10241. o Major bugfixes (directory authority):
  10242. - Avoid a crash when testing router reachability on a router that
  10243. could have an ed25519 ID, but which does not. Fixes bug 25415;
  10244. bugfix on 0.3.3.2-alpha.
  10245. o Major bugfixes (onion service):
  10246. - Correctly detect when onion services get disabled after HUP. Fixes
  10247. bug 25761; bugfix on 0.3.2.1.
  10248. o Major bugfixes (protover, voting):
  10249. - Revise Rust implementation of protover to use a more memory-
  10250. efficient voting algorithm and corresponding data structures, thus
  10251. avoiding a potential (but small impact) DoS attack where specially
  10252. crafted protocol strings would expand to several potential
  10253. megabytes in memory. In the process, several portions of code were
  10254. revised to be methods on new, custom types, rather than functions
  10255. taking interchangeable types, thus increasing type safety of the
  10256. module. Custom error types and handling were added as well, in
  10257. order to facilitate better error dismissal/handling in outside
  10258. crates and avoid mistakenly passing an internal error string to C
  10259. over the FFI boundary. Many tests were added, and some previous
  10260. differences between the C and Rust implementations have been
  10261. remedied. Fixes bug 24031; bugfix on 0.3.3.1-alpha.
  10262. o Major bugfixes (relay, denial of service):
  10263. - Impose a limit on circuit cell queue size. The limit can be
  10264. controlled by a consensus parameter. Fixes bug 25226; bugfix
  10265. on 0.2.4.14-alpha.
  10266. o Minor features (accounting):
  10267. - When Tor becomes dormant, it now uses a scheduled event to wake up
  10268. at the right time. Previously, we would use the per-second timer
  10269. to check whether to wake up, but we no longer have any per-second
  10270. timers enabled when the network is disabled. Closes ticket 26064.
  10271. o Minor features (code quality):
  10272. - Add optional spell-checking for the Tor codebase, using the
  10273. "misspell" program. To use this feature, run "make check-typos".
  10274. Closes ticket 25024.
  10275. o Minor features (compatibility):
  10276. - Tor now detects versions of OpenSSL 1.1.0 and later compiled with
  10277. the no-deprecated option, and builds correctly with them. Closes
  10278. tickets 19429, 19981, and 25353.
  10279. - Avoid some compilation warnings with recent versions of LibreSSL.
  10280. Closes ticket 26006.
  10281. o Minor features (compression, zstd):
  10282. - When running with zstd, Tor now considers using advanced functions
  10283. that the zstd maintainers have labeled as potentially unstable. To
  10284. prevent breakage, Tor will only use this functionality when the
  10285. runtime version of the zstd library matches the version with which
  10286. Tor was compiled. Closes ticket 25162.
  10287. o Minor features (configuration):
  10288. - The "DownloadSchedule" options have been renamed to end with
  10289. "DownloadInitialDelay". The old names are still allowed, but will
  10290. produce a warning. Comma-separated lists are still permitted for
  10291. these options, but all values after the first are ignored (as they
  10292. have been since 0.2.9). Closes ticket 23354.
  10293. o Minor features (continuous integration):
  10294. - Our .travis.yml configuration now includes support for testing the
  10295. results of "make distcheck". (It's not uncommon for "make check"
  10296. to pass but "make distcheck" to fail.) Closes ticket 25814.
  10297. - Our Travis CI configuration now integrates with the Coveralls
  10298. coverage analysis tool. Closes ticket 25818.
  10299. o Minor features (control port):
  10300. - Introduce GETINFO "current-time/{local,utc}" to return the local
  10301. and UTC times respectively in ISO format. This helps a controller
  10302. like Tor Browser detect a time-related error. Closes ticket 25511.
  10303. Patch by Neel Chauhan.
  10304. - Introduce new fields to the CIRC_BW event. There are two new
  10305. fields in each of the read and written directions. The DELIVERED
  10306. fields report the total valid data on the circuit, as measured by
  10307. the payload sizes of verified and error-checked relay command
  10308. cells. The OVERHEAD fields report the total unused bytes in each
  10309. of these cells. Closes ticket 25903.
  10310. o Minor features (directory authority):
  10311. - Directory authorities now open their key-pinning files as O_SYNC,
  10312. to limit their chances of accidentally writing partial lines.
  10313. Closes ticket 23909.
  10314. o Minor features (directory authority, forward compatibility):
  10315. - Make the lines of the measured bandwidth file able to contain
  10316. their entries in any order. Previously, the node_id entry needed
  10317. to come first. Closes ticket 26004.
  10318. o Minor features (entry guards):
  10319. - Introduce a new torrc option NumPrimaryGuards for controlling the
  10320. number of primary guards. Closes ticket 25843.
  10321. o Minor features (geoip):
  10322. - Update geoip and geoip6 to the May 1 2018 Maxmind GeoLite2 Country
  10323. database. Closes ticket 26104.
  10324. o Minor features (performance):
  10325. - Avoid a needless call to malloc() when processing an incoming
  10326. relay cell. Closes ticket 24914.
  10327. - Make our timing-wheel code run a tiny bit faster on 32-bit
  10328. platforms, by preferring 32-bit math to 64-bit. Closes
  10329. ticket 24688.
  10330. - Avoid a needless malloc()/free() pair every time we handle an ntor
  10331. handshake. Closes ticket 25150.
  10332. o Minor features (testing):
  10333. - Add a unit test for voting_schedule_get_start_of_next_interval().
  10334. Closes ticket 26014, and helps make unit test coverage
  10335. more deterministic.
  10336. - A new unittests module specifically for testing the functions in
  10337. the (new-ish) bridges.c module has been created with new
  10338. unittests, raising the code coverage percentages. Closes 25425.
  10339. - We now have improved testing for addressmap_get_virtual_address()
  10340. function. This should improve our test coverage, and make our test
  10341. coverage more deterministic. Closes ticket 25993.
  10342. o Minor features (timekeeping, circuit scheduling):
  10343. - When keeping track of how busy each circuit have been recently on
  10344. a given connection, use coarse-grained monotonic timers rather
  10345. than gettimeofday(). This change should marginally increase
  10346. accuracy and performance. Implements part of ticket 25927.
  10347. o Minor bugfixes (bandwidth management):
  10348. - Consider ourselves "low on write bandwidth" if we have exhausted
  10349. our write bandwidth some time in the last second. This was the
  10350. documented behavior before, but the actual behavior was to change
  10351. this value every TokenBucketRefillInterval. Fixes bug 25828;
  10352. bugfix on 0.2.3.5-alpha.
  10353. o Minor bugfixes (C correctness):
  10354. - Add a missing lock acquisition in the shutdown code of the control
  10355. subsystem. Fixes bug 25675; bugfix on 0.2.7.3-rc. Found by
  10356. Coverity; this is CID 1433643.
  10357. o Minor bugfixes (circuit path selection):
  10358. - Don't count path selection failures as circuit build failures.
  10359. This change should eliminate cases where Tor blames its guard or
  10360. the network for situations like insufficient microdescriptors
  10361. and/or overly restrictive torrc settings. Fixes bug 25705; bugfix
  10362. on 0.3.3.1-alpha.
  10363. o Minor bugfixes (client):
  10364. - Don't consider Tor running as a client if the ControlPort is open,
  10365. but no actual client ports are open. Fixes bug 26062; bugfix
  10366. on 0.2.9.4-alpha.
  10367. o Minor bugfixes (code style):
  10368. - Fixed multiple includes of transports.h in src/or/connection.c
  10369. Fixes bug 25261; bugfix on 0.2.5.1-alpha.
  10370. - Remove the unused variable n_possible from the function
  10371. channel_get_for_extend(). Fixes bug 25645; bugfix on 0.2.4.4-alpha
  10372. o Minor bugfixes (control interface):
  10373. - Respond with more human-readable error messages to GETINFO exit-
  10374. policy/* requests. Also, let controller know if an error is
  10375. transient (response code 551) or not (response code 552). Fixes
  10376. bug 25852; bugfix on 0.2.8.1-alpha.
  10377. o Minor bugfixes (controller):
  10378. - Make CIRC_BW event reflect the total of all data sent on a
  10379. circuit, including padding and dropped cells. Also fix a mis-
  10380. counting bug when STREAM_BW events were enabled. Fixes bug 25400;
  10381. bugfix on 0.2.5.2-alpha.
  10382. o Minor bugfixes (correctness, client):
  10383. - Upon receiving a malformed connected cell, stop processing the cell
  10384. immediately. Previously we would mark the connection for close, but
  10385. continue processing the cell as if the connection were open. Fixes bug
  10386. 26072; bugfix on 0.2.4.7-alpha.
  10387. o Minor bugfixes (directory client):
  10388. - When unverified-consensus is verified, rename it to cached-
  10389. consenus. Fixes bug 4187; bugfix on 0.2.0.3-alpha.
  10390. - Fixed launching a certificate fetch always during the scheduled
  10391. periodic consensus fetch by fetching only in those cases when
  10392. consensus are waiting for certs. Fixes bug 24740; bugfix
  10393. on 0.2.9.1-alpha.
  10394. o Minor bugfixes (documentation):
  10395. - Stop saying in the manual that clients cache ipv4 dns answers from
  10396. exit relays. We haven't used them since 0.2.6.3-alpha, and in
  10397. ticket 24050 we stopped even caching them as of 0.3.2.6-alpha, but
  10398. we forgot to say so in the man page. Fixes bug 26052; bugfix
  10399. on 0.3.2.6-alpha.
  10400. o Minor bugfixes (error reporting):
  10401. - Improve tolerance for directory authorities with skewed clocks.
  10402. Previously, an authority with a clock more than 60 seconds ahead
  10403. could cause a client with a correct clock to warn that the
  10404. client's clock was behind. Now the clocks of a majority of
  10405. directory authorities have to be ahead of the client before this
  10406. warning will occur. Fixes bug 25756; bugfix on 0.2.2.25-alpha.
  10407. o Minor bugfixes (Linux seccomp2 sandbox):
  10408. - Allow the nanosleep() system call, which glibc uses to implement
  10409. sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
  10410. o Minor bugfixes (onion service):
  10411. - Fix a memory leak when a v3 onion service is configured and gets a
  10412. SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha.
  10413. - When parsing the descriptor signature, look for the token plus an
  10414. extra white-space at the end. This is more correct but also will
  10415. allow us to support new fields that might start with "signature".
  10416. Fixes bug 26069; bugfix on 0.3.0.1-alpha.
  10417. o Minor bugfixes (path selection):
  10418. - Only select relays when they have the descriptors we prefer to use
  10419. for them. This change fixes a bug where we could select a relay
  10420. because it had _some_ descriptor, but reject it later with a
  10421. nonfatal assertion error because it didn't have the exact one we
  10422. wanted. Fixes bugs 25691 and 25692; bugfix on 0.3.3.4-alpha.
  10423. o Minor bugfixes (portability):
  10424. - Do not align mmap length, as it is not required by POSIX, and the
  10425. getpagesize function is deprecated. Fixes bug 25399; bugfix
  10426. on 0.1.1.23.
  10427. o Minor bugfixes (portability, FreeBSD):
  10428. - In have_enough_mem_for_dircache(), the variable DIRCACHE_MIN_MEM_MB
  10429. does not stringify on FreeBSD, so we switch to tor_asprintf().
  10430. Fixes bug 20887; bugfix on 0.2.8.1-alpha. Patch by Neel Chauhan.
  10431. o Minor bugfixes (relay statistics):
  10432. - When a relay is collecting internal statistics about how many
  10433. create cell requests it has seen of each type, accurately count
  10434. the requests from relays that temporarily fall out of the
  10435. consensus. (To be extra conservative, we were already ignoring
  10436. requests from clients in our counts, and we continue ignoring them
  10437. here.) Fixes bug 24910; bugfix on 0.2.4.17-rc.
  10438. o Minor bugfixes (relay, crash):
  10439. - Avoid a crash when running with DirPort set but ORPort turned off.
  10440. Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha.
  10441. o Minor bugfixes (restart-in-process):
  10442. - When shutting down, Tor now clears all the flags in the control.c
  10443. module. This should prevent a bug where authentication cookies are
  10444. not generated on restart. Fixes bug 25512; bugfix on 0.3.3.1-alpha.
  10445. o Minor bugfixes (testing):
  10446. - When testing workqueue event-cancellation, make sure that we
  10447. actually cancel an event, and that cancel each event with equal
  10448. probability. (It was previously possible, though extremely
  10449. unlikely, for our event-canceling test not to cancel any events.)
  10450. Fixes bug 26008; bugfix on 0.2.6.3-alpha.
  10451. - Repeat part of the test in test_client_pick_intro() a number of
  10452. times, to give it consistent coverage. Fixes bug 25996; bugfix
  10453. on 0.3.2.1-alpha.
  10454. - Remove randomness from the hs_common/responsible_hsdirs test, so
  10455. that it always takes the same path through the function it tests.
  10456. Fixes bug 25997; bugfix on 0.3.2.1-alpha.
  10457. - Change the behavior of the "channel/outbound" test so that it
  10458. never causes a 10-second rollover for the EWMA circuitmux code.
  10459. Previously, this behavior would happen randomly, and result in
  10460. fluctuating test coverage. Fixes bug 25994; bugfix
  10461. on 0.3.3.1-alpha.
  10462. - Use X509_new() to allocate certificates that will be freed later
  10463. with X509_free(). Previously, some parts of the unit tests had
  10464. used tor_malloc_zero(), which is incorrect, and which caused test
  10465. failures on Windows when they were built with extra hardening.
  10466. Fixes bugs 25943 and 25944; bugfix on 0.2.8.1-alpha. Patch by
  10467. Marcin Cieślak.
  10468. - While running the circuit_timeout test, fix the PRNG to a
  10469. deterministic AES stream, so that the test coverage from this test
  10470. will itself be deterministic. Fixes bug 25995; bugfix
  10471. on 0.2.2.2-alpha.
  10472. o Minor bugfixes (vanguards):
  10473. - Allow the last hop in a vanguard circuit to be the same as our
  10474. first, to prevent the adversary from influencing guard node choice
  10475. by choice of last hop. Also prevent the creation of A - B - A
  10476. paths, or A - A paths, which are forbidden by relays. Fixes bug
  10477. 25870; bugfix on 0.3.3.1-alpha.
  10478. o Code simplification and refactoring:
  10479. - Remove duplicate code in parse_{c,s}method_line and bootstrap
  10480. their functionalities into a single function. Fixes bug 6236;
  10481. bugfix on 0.2.3.6-alpha.
  10482. - We remove the PortForwarding and PortForwardingHelper options,
  10483. related functions, and the port_forwarding tests. These options
  10484. were used by the now-deprecated Vidalia to help ordinary users
  10485. become Tor relays or bridges. Closes ticket 25409. Patch by
  10486. Neel Chauhan.
  10487. - In order to make the OR and dir checking function in router.c less
  10488. confusing we renamed some functions and
  10489. consider_testing_reachability() has been split into
  10490. router_should_check_reachability() and
  10491. router_do_reachability_checks(). Also we improved the documentation
  10492. in some functions. Closes ticket 18918.
  10493. - Initial work to isolate Libevent usage to a handful of modules in
  10494. our codebase, to simplify our call structure, and so that we can
  10495. more easily change event loops in the future if needed. Closes
  10496. ticket 23750.
  10497. - Introduce a function to call getsockname() and return tor_addr_t,
  10498. to save a little complexity throughout the codebase. Closes
  10499. ticket 18105.
  10500. - Make hsdir_index in node_t a hsdir_index_t rather than a pointer
  10501. as hsdir_index is always present. Also, we move hsdir_index_t into
  10502. or.h. Closes ticket 23094. Patch by Neel Chauhan.
  10503. - Merge functions used for describing nodes and suppress the
  10504. functions that do not allocate memory for the output buffer
  10505. string. NODE_DESC_BUF_LEN constant and format_node_description()
  10506. function cannot be used externally from router.c module anymore.
  10507. Closes ticket 25432. Patch by valentecaio.
  10508. - Our main loop has been simplified so that all important operations
  10509. happen inside events. Previously, some operations had to happen
  10510. outside the event loop, to prevent infinite sequences of event
  10511. activations. Closes ticket 25374.
  10512. - Put a SHA1 public key digest in hs_service_intro_point_t, and use
  10513. it in register_intro_circ() and service_intro_point_new(). This
  10514. prevents the digest from being re-calculated each time. Closes
  10515. ticket 23107. Patch by Neel Chauhan.
  10516. - Refactor token-bucket implementations to use a common backend.
  10517. Closes ticket 25766.
  10518. - Remove extern declaration of stats_n_seconds_working variable from
  10519. main, protecting its accesses with get_uptime() and reset_uptime()
  10520. functions. Closes ticket 25081, patch by “valentecaio”.
  10521. - Remove our previous logic for "cached gettimeofday()" -- our
  10522. coarse monotonic timers are fast enough for this purpose, and far
  10523. less error-prone. Implements part of ticket 25927.
  10524. - Remove the return value for fascist_firewall_choose_address_base(),
  10525. and sister functions such as fascist_firewall_choose_address_node()
  10526. and fascist_firewall_choose_address_rs(). Also, while we're here,
  10527. initialize the ap argument as leaving it uninitialized can pose a
  10528. security hazard. Closes ticket 24734. Patch by Neel Chauhan.
  10529. - Rename two fields of connection_t struct. timestamp_lastwritten is
  10530. renamed to timestamp_last_write_allowed and timestamp_lastread is
  10531. renamed to timestamp_last_read_allowed. Closes ticket 24714, patch
  10532. by "valentecaio".
  10533. - Since Tor requires C99, remove our old workaround code for libc
  10534. implementations where free(NULL) doesn't work. Closes ticket 24484.
  10535. - Use our standard rate-limiting code to deal with excessive
  10536. libevent failures, rather than the hand-rolled logic we had
  10537. before. Closes ticket 26016.
  10538. - We remove the return value of node_get_prim_orport() and
  10539. node_get_prim_dirport(), and introduce node_get_prim_orport() in
  10540. node_ipv6_or_preferred() and node_ipv6_dir_preferred() in order to
  10541. check for a null address. Closes ticket 23873. Patch by
  10542. Neel Chauhan.
  10543. - We switch to should_record_bridge_info() in
  10544. geoip_note_client_seen() and options_need_geoip_info() instead of
  10545. accessing the configuration values directly. Fixes bug 25290;
  10546. bugfix on 0.2.1.6-alpha. Patch by Neel Chauhan.
  10547. o Deprecated features:
  10548. - As we are not recommending 0.2.5 anymore, we require relays that
  10549. once had an ed25519 key associated with their RSA key to always
  10550. have that key, instead of allowing them to drop back to a version
  10551. that didn't support ed25519. This means they need to use a new RSA
  10552. key if they want to downgrade to an older version of tor without
  10553. ed25519. Closes ticket 20522.
  10554. o Documentation:
  10555. - Correct an IPv6 error in the documentation for ExitPolicy. Closes
  10556. ticket 25857. Patch from "CTassisF".
  10557. o Removed features:
  10558. - Directory authorities will no longer support voting according to
  10559. any consensus method before consensus method 25. This keeps
  10560. authorities compatible with all authorities running 0.2.9.8 and
  10561. later, and does not break any clients or relays. Implements ticket
  10562. 24378 and proposal 290.
  10563. - The PortForwarding and PortForwardingHelper features have been
  10564. removed. The reasoning is, given that implementations of NAT
  10565. traversal protocols within common consumer grade routers are
  10566. frequently buggy, and that the target audience for a NAT punching
  10567. feature is a perhaps less-technically-inclined relay operator,
  10568. when the helper fails to setup traversal the problems are usually
  10569. deep, ugly, and very router specific, making them horrendously
  10570. impossible for technical support to reliable assist with, and thus
  10571. resulting in frustration all around. Unfortunately, relay
  10572. operators who would like to run relays behind NATs will need to
  10573. become more familiar with the port forwarding configurations on
  10574. their local router. Closes 25409.
  10575. - The TestingEnableTbEmptyEvent option has been removed. It was used
  10576. in testing simulations to measure how often connection buckets
  10577. were emptied, in order to improve our scheduling, but it has not
  10578. been actively used in years. Closes ticket 25760.
  10579. - The old "round-robin" circuit multiplexer (circuitmux)
  10580. implementation has been removed, along with a fairly large set of
  10581. code that existed to support it. It has not been the default
  10582. circuitmux since we introduced the "EWMA" circuitmux in 0.2.4.x,
  10583. but it still required an unreasonable amount of memory and CPU.
  10584. Closes ticket 25268.
  10585. Changes in version 0.3.3.5-rc - 2018-04-15
  10586. Tor 0.3.3.5-rc fixes various bugs in earlier versions of Tor,
  10587. including some that could affect reliability or correctness.
  10588. This is the first release candidate in the 0.3.3 series. If we find no
  10589. new bugs or regression here, then the first stable 0.3.3 release will
  10590. be nearly identical to this one.
  10591. o Major bugfixes (security, protover, voting):
  10592. - Revise Rust implementation of protover to use a more memory-
  10593. efficient voting algorithm and corresponding data structures, thus
  10594. avoiding a potential memory-based DoS attack where specially
  10595. crafted protocol strings would expand to fill available memory.
  10596. Fixes bug 24031; bugfix on 0.3.3.1-alpha.
  10597. o Major bugfixes (performance, load balancing):
  10598. - Directory authorities no longer vote in favor of the Guard flag
  10599. for relays without directory support. Starting in Tor
  10600. 0.3.0.1-alpha, clients have been avoiding using such relays in the
  10601. Guard position, leading to increasingly broken load balancing for
  10602. the 5%-or-so of Guards that don't advertise directory support.
  10603. Fixes bug 22310; bugfix on 0.3.0.6.
  10604. o Minor feature (continuous integration):
  10605. - Update the Travis CI configuration to use the stable Rust channel,
  10606. now that we have decided to require that. Closes ticket 25714.
  10607. o Minor features (config options):
  10608. - Change the way the default value for MaxMemInQueues is calculated.
  10609. We now use 40% of the hardware RAM if the system has 8 GB RAM or
  10610. more. Otherwise we use the former value of 75%. Closes
  10611. ticket 24782.
  10612. o Minor features (geoip):
  10613. - Update geoip and geoip6 to the April 3 2018 Maxmind GeoLite2
  10614. Country database. Closes ticket 25718.
  10615. o Minor bugfixes (client):
  10616. - When using a listed relay as a bridge, and also using
  10617. microdescriptors, and considering that relay as a non-bridge in a
  10618. circuit, treat its microdescriptor as a valid source of
  10619. information about that relay. This change should prevent a non-
  10620. fatal assertion error. Fixes bug 25691; bugfix on 0.3.3.4-alpha.
  10621. o Minor bugfixes (controller):
  10622. - Restore the correct operation of the RESOLVE command, which had
  10623. been broken since we added the ability to enable/disable DNS on
  10624. specific listener ports. Fixes bug 25617; bugfix on 0.2.9.3-alpha.
  10625. o Minor bugfixes (distribution, compilation, rust):
  10626. - Build correctly when the rust dependencies submodule is loaded,
  10627. but the TOR_RUST_DEPENDENCIES environment variable is not set.
  10628. Fixes bug 25679; bugfix on 0.3.3.1-alpha.
  10629. - Actually include all of our Rust source in our source
  10630. distributions. (Previously, a few of the files were accidentally
  10631. omitted.) Fixes bug 25732; bugfix on 0.3.3.2-alpha.
  10632. o Minor bugfixes (documentation):
  10633. - Document that the PerConnBW{Rate,Burst} options will fall back to
  10634. their corresponding consensus parameters only if those parameters
  10635. are set. Previously we had claimed that these values would always
  10636. be set in the consensus. Fixes bug 25296; bugfix on 0.2.2.7-alpha.
  10637. - Revert a misformatting issue in the ExitPolicy documentation.
  10638. Fixes bug 25582; bugfix on 0.3.3.1-alpha.
  10639. o Minor bugfixes (exit relay DNS retries):
  10640. - Re-attempt timed-out DNS queries 3 times before failure, since our
  10641. timeout is 5 seconds for them, but clients wait 10-15. Also allow
  10642. slightly more timeouts per resolver when an exit has multiple
  10643. resolvers configured. Fixes bug 21394; bugfix on 0.3.1.9.
  10644. o Minor bugfixes (onion services):
  10645. - Re-instate counting the client HSDir fetch circuits against the
  10646. MaxClientCircuitsPending rate limit. Fixes bug 24989; bugfix
  10647. on 0.3.3.1-alpha.
  10648. - Remove underscores from the _HSLayer{2,3}Nodes options. This
  10649. expert-user configuration can now be enabled as HSLayer{2,3}Nodes.
  10650. Fixes bug 25581; bugfix on 0.3.3.1-alpha
  10651. o Code simplification and refactoring:
  10652. - Move the list of default directory authorities to its own file.
  10653. Closes ticket 24854. Patch by "beastr0".
  10654. o Documentation (manpage, denial of service):
  10655. - Provide more detail about the denial-of-service options, by
  10656. listing each mitigation and explaining how they relate. Closes
  10657. ticket 25248.
  10658. Changes in version 0.3.3.4-alpha - 2018-03-29
  10659. Tor 0.3.3.4-alpha includes various bugfixes for issues found during
  10660. the alpha testing of earlier releases in its series. We are
  10661. approaching a stable 0.3.3.4-alpha release: more testing is welcome!
  10662. o New system requirements:
  10663. - When built with Rust, Tor now depends on version 0.2.39 of the
  10664. libc crate. Closes tickets 25310 and 25664.
  10665. o Major bugfixes (relay, connection):
  10666. - If we have failed to connect to a relay and received a connection
  10667. refused, timeout, or similar error (at the TCP level), do not try
  10668. that same address/port again for 60 seconds after the failure has
  10669. occurred. Fixes bug 24767; bugfix on 0.0.6.
  10670. o Minor features (geoip):
  10671. - Update geoip and geoip6 to the March 8 2018 Maxmind GeoLite2
  10672. Country database. Closes ticket 25469.
  10673. o Minor features (log messages):
  10674. - Improve log message in the out-of-memory handler to include
  10675. information about memory usage from the different compression
  10676. backends. Closes ticket 25372.
  10677. o Minor features (sandbox):
  10678. - Explicitly permit the poll() system call when the Linux
  10679. seccomp2-based sandbox is enabled: apparently, some versions of
  10680. libc use poll() when calling getpwnam(). Closes ticket 25313.
  10681. o Minor bugfixes (C correctness):
  10682. - Fix a very unlikely (impossible, we believe) null pointer
  10683. dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by
  10684. Coverity; this is CID 1430932.
  10685. o Minor bugfixes (channel, client):
  10686. - Better identify client connection when reporting to the geoip
  10687. client cache. Fixes bug 24904; bugfix on 0.3.1.7.
  10688. o Minor bugfixes (compilation):
  10689. - Fix a C99 compliance issue in our configuration script that caused
  10690. compilation issues when compiling Tor with certain versions of
  10691. xtools. Fixes bug 25474; bugfix on 0.3.2.5-alpha.
  10692. o Minor bugfixes (controller, reliability):
  10693. - Avoid a (nonfatal) assertion failure when extending a one-hop
  10694. circuit from the controller to become a multihop circuit. Fixes
  10695. bug 24903; bugfix on 0.2.5.2-alpha.
  10696. o Major bugfixes (networking):
  10697. - Tor will no longer reject IPv6 address strings from Tor Browser
  10698. when they are passed as hostnames in SOCKS5 requests. Fixes bug
  10699. 25036, bugfix on Tor 0.3.1.2.
  10700. o Minor bugfixes (networking):
  10701. - string_is_valid_hostname() will not consider IP strings to be
  10702. valid hostnames. Fixes bug 25055; bugfix on Tor 0.2.5.5.
  10703. o Minor bugfixes (onion service v3):
  10704. - Avoid an assertion failure when the next onion service
  10705. descriptor rotation type is out of sync with the consensus's
  10706. valid-after time. Instead, log a warning message with extra
  10707. information, so we can better hunt down the cause of this
  10708. assertion. Fixes bug 25306; bugfix on 0.3.2.1-alpha.
  10709. o Minor bugfixes (testing):
  10710. - Avoid intermittent test failures due to a test that had relied on
  10711. onion service introduction point creation finishing within 5
  10712. seconds of real clock time. Fixes bug 25450; bugfix
  10713. on 0.3.1.3-alpha.
  10714. - Rust crates are now automatically detected and tested. Previously,
  10715. some crates were not tested by `make test-rust` due to a static
  10716. string in the `src/test/test_rust.sh` script specifying which
  10717. crates to test. Fixes bug 25560; bugfix on 0.3.3.3-alpha.
  10718. o Minor bugfixes (testing, benchmarks):
  10719. - Fix a crash when running benchmark tests on win32 systems. The
  10720. crash was due to a mutex that wasn't initialized before logging
  10721. and options were initialized. Fixes bug 25479; bugfix
  10722. on 0.3.3.3-alpha.
  10723. o Minor bugfixes (warnings, ipv6):
  10724. - Avoid a bug warning that could occur when trying to connect to a
  10725. relay over IPv6. This warning would occur on a Tor instance that
  10726. downloads router descriptors, but prefers to use microdescriptors.
  10727. Fixes bug 25213; bugfix on 0.3.3.1-alpha.
  10728. o Code simplification and refactoring:
  10729. - Remove the old (deterministic) directory retry logic entirely:
  10730. We've used exponential backoff exclusively for some time. Closes
  10731. ticket 23814.
  10732. o Documentation:
  10733. - Improved the documentation of AccountingStart parameter. Closes
  10734. ticket 23635.
  10735. - Update the documentation for "Log" to include the current list of
  10736. logging domains. Closes ticket 25378.
  10737. Changes in version 0.3.1.10 - 2018-03-03
  10738. Tor 0.3.1.10 backports a number of bugfixes, including important fixes for
  10739. security issues.
  10740. It includes an important security fix for a remote crash attack
  10741. against directory authorities, tracked as TROVE-2018-001.
  10742. This release also backports our new system for improved resistance to
  10743. denial-of-service attacks against relays.
  10744. This release also fixes several minor bugs and annoyances from
  10745. earlier releases.
  10746. All directory authorities should upgrade to one of the versions
  10747. released today. Relays running 0.3.1.x may wish to update to one of
  10748. the versions released today, for the DoS mitigations.
  10749. Please note: according to our release calendar, Tor 0.3.1 will no
  10750. longer be supported after 1 July 2018. If you will be running Tor
  10751. after that date, you should make sure to plan to upgrade to the latest
  10752. stable version, or downgrade to 0.2.9 (which will receive long-term
  10753. support).
  10754. o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha):
  10755. - Fix a protocol-list handling bug that could be used to remotely crash
  10756. directory authorities with a null-pointer exception. Fixes bug 25074;
  10757. bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
  10758. CVE-2018-0490.
  10759. o Major features (denial-of-service mitigation, backport from 0.3.3.2-alpha):
  10760. - Give relays some defenses against the recent network overload. We
  10761. start with three defenses (default parameters in parentheses).
  10762. First: if a single client address makes too many concurrent
  10763. connections (>100), hang up on further connections. Second: if a
  10764. single client address makes circuits too quickly (more than 3 per
  10765. second, with an allowed burst of 90) while also having too many
  10766. connections open (3), refuse new create cells for the next while
  10767. (1-2 hours). Third: if a client asks to establish a rendezvous
  10768. point to you directly, ignore the request. These defenses can be
  10769. manually controlled by new torrc options, but relays will also
  10770. take guidance from consensus parameters, so there's no need to
  10771. configure anything manually. Implements ticket 24902.
  10772. o Minor features (linux seccomp2 sandbox, backport from 0.3.2.5-alpha):
  10773. - Update the sandbox rules so that they should now work correctly
  10774. with Glibc 2.26. Closes ticket 24315.
  10775. o Major bugfixes (onion services, retry behavior, backport from 0.3.3.1-alpha):
  10776. - Fix an "off by 2" error in counting rendezvous failures on the
  10777. onion service side. While we thought we would stop the rendezvous
  10778. attempt after one failed circuit, we were actually making three
  10779. circuit attempts before giving up. Now switch to a default of 2,
  10780. and allow the consensus parameter "hs_service_max_rdv_failures" to
  10781. override. Fixes bug 24895; bugfix on 0.0.6.
  10782. o Major bugfixes (protocol versions, backport from 0.3.3.2-alpha):
  10783. - Add Link protocol version 5 to the supported protocols list. Fixes
  10784. bug 25070; bugfix on 0.3.1.1-alpha.
  10785. o Major bugfixes (relay, backport from 0.3.3.1-alpha):
  10786. - Fix a set of false positives where relays would consider
  10787. connections to other relays as being client-only connections (and
  10788. thus e.g. deserving different link padding schemes) if those
  10789. relays fell out of the consensus briefly. Now we look only at the
  10790. initial handshake and whether the connection authenticated as a
  10791. relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha.
  10792. o Minor features (denial-of-service avoidance, backport from 0.3.3.2-alpha):
  10793. - Make our OOM handler aware of the geoip client history cache so it
  10794. doesn't fill up the memory. This check is important for IPv6 and
  10795. our DoS mitigation subsystem. Closes ticket 25122.
  10796. o Minor feature (relay statistics, backport from 0.3.2.6-alpha):
  10797. - Change relay bandwidth reporting stats interval from 4 hours to 24
  10798. hours in order to reduce the efficiency of guard discovery
  10799. attacks. Fixes ticket 23856.
  10800. o Minor features (compatibility, OpenSSL, backport from 0.3.3.3-alpha):
  10801. - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
  10802. Previous versions of Tor would not have worked with OpenSSL 1.1.1,
  10803. since they neither disabled TLS 1.3 nor enabled any of the
  10804. ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
  10805. Closes ticket 24978.
  10806. o Minor features (fallback directory mirrors, backport from 0.3.2.9):
  10807. - The fallback directory list has been re-generated based on the
  10808. current status of the network. Tor uses fallback directories to
  10809. bootstrap when it doesn't yet have up-to-date directory
  10810. information. Closes ticket 24801.
  10811. - Make the default DirAuthorityFallbackRate 0.1, so that clients
  10812. prefer to bootstrap from fallback directory mirrors. This is a
  10813. follow-up to 24679, which removed weights from the default
  10814. fallbacks. Implements ticket 24681.
  10815. o Minor features (geoip):
  10816. - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
  10817. Country database.
  10818. o Minor bugfix (channel connection, backport from 0.3.3.2-alpha):
  10819. - Use the actual observed address of an incoming relay connection,
  10820. not the canonical address of the relay from its descriptor, when
  10821. making decisions about how to handle the incoming connection.
  10822. Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
  10823. o Minor bugfix (directory authority, backport from 0.3.3.2-alpha):
  10824. - Directory authorities, when refusing a descriptor from a rejected
  10825. relay, now explicitly tell the relay (in its logs) to set a valid
  10826. ContactInfo address and contact the bad-relays@ mailing list.
  10827. Fixes bug 25170; bugfix on 0.2.9.1.
  10828. o Minor bugfixes (address selection, backport from 0.3.2.9):
  10829. - When the fascist_firewall_choose_address_ functions don't find a
  10830. reachable address, set the returned address to the null address
  10831. and port. This is a precautionary measure, because some callers do
  10832. not check the return value. Fixes bug 24736; bugfix
  10833. on 0.2.8.2-alpha.
  10834. o Major bugfixes (bootstrapping, backport from 0.3.2.5-alpha):
  10835. - Fetch descriptors aggressively whenever we lack enough to build
  10836. circuits, regardless of how many descriptors we are missing.
  10837. Previously, we would delay launching the fetch when we had fewer
  10838. than 15 missing descriptors, even if some of those descriptors
  10839. were blocking circuits from building. Fixes bug 23985; bugfix on
  10840. 0.1.1.11-alpha. The effects of this bug became worse in
  10841. 0.3.0.3-alpha, when we began treating missing descriptors from our
  10842. primary guards as a reason to delay circuits.
  10843. - Don't try fetching microdescriptors from relays that have failed
  10844. to deliver them in the past. Fixes bug 23817; bugfix
  10845. on 0.3.0.1-alpha.
  10846. o Minor bugfixes (compilation, backport from 0.3.2.7-rc):
  10847. - Fix a signed/unsigned comparison warning introduced by our fix to
  10848. TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16.
  10849. o Minor bugfixes (control port, linux seccomp2 sandbox, backport from 0.3.2.5-alpha):
  10850. - Avoid a crash when attempting to use the seccomp2 sandbox together
  10851. with the OwningControllerProcess feature. Fixes bug 24198; bugfix
  10852. on 0.2.5.1-alpha.
  10853. o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha):
  10854. - Fix a possible crash on malformed consensus. If a consensus had
  10855. contained an unparseable protocol line, it could have made clients
  10856. and relays crash with a null-pointer exception. To exploit this
  10857. issue, however, an attacker would need to be able to subvert the
  10858. directory authority system. Fixes bug 25251; bugfix on
  10859. 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
  10860. o Minor bugfixes (directory cache, backport from 0.3.2.5-alpha):
  10861. - Recover better from empty or corrupt files in the consensus cache
  10862. directory. Fixes bug 24099; bugfix on 0.3.1.1-alpha.
  10863. - When a consensus diff calculation is only partially successful,
  10864. only record the successful parts as having succeeded. Partial
  10865. success can happen if (for example) one compression method fails
  10866. but the others succeed. Previously we misrecorded all the
  10867. calculations as having succeeded, which would later cause a
  10868. nonfatal assertion failure. Fixes bug 24086; bugfix
  10869. on 0.3.1.1-alpha.
  10870. o Minor bugfixes (entry guards, backport from 0.3.2.3-alpha):
  10871. - Tor now updates its guard state when it reads a consensus
  10872. regardless of whether it's missing descriptors. That makes tor use
  10873. its primary guards to fetch descriptors in some edge cases where
  10874. it would previously have used fallback directories. Fixes bug
  10875. 23862; bugfix on 0.3.0.1-alpha.
  10876. o Minor bugfixes (logging, backport from 0.3.3.2-alpha):
  10877. - Don't treat inability to store a cached consensus object as a bug:
  10878. it can happen normally when we are out of disk space. Fixes bug
  10879. 24859; bugfix on 0.3.1.1-alpha.
  10880. o Minor bugfixes (memory usage, backport from 0.3.2.8-rc):
  10881. - When queuing DESTROY cells on a channel, only queue the circuit-id
  10882. and reason fields: not the entire 514-byte cell. This fix should
  10883. help mitigate any bugs or attacks that fill up these queues, and
  10884. free more RAM for other uses. Fixes bug 24666; bugfix
  10885. on 0.2.5.1-alpha.
  10886. o Minor bugfixes (network layer, backport from 0.3.2.5-alpha):
  10887. - When closing a connection via close_connection_immediately(), we
  10888. mark it as "not blocked on bandwidth", to prevent later calls from
  10889. trying to unblock it, and give it permission to read. This fixes a
  10890. backtrace warning that can happen on relays under various
  10891. circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc.
  10892. o Minor bugfixes (path selection, backport from 0.3.2.4-alpha):
  10893. - When selecting relays by bandwidth, avoid a rounding error that
  10894. could sometimes cause load to be imbalanced incorrectly.
  10895. Previously, we would always round upwards; now, we round towards
  10896. the nearest integer. This had the biggest effect when a relay's
  10897. weight adjustments should have given it weight 0, but it got
  10898. weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha.
  10899. - When calculating the fraction of nodes that have descriptors, and
  10900. all nodes in the network have zero bandwidths, count the number of
  10901. nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha.
  10902. - Actually log the total bandwidth in compute_weighted_bandwidths().
  10903. Fixes bug 24170; bugfix on 0.2.4.3-alpha.
  10904. o Minor bugfixes (performance, fragile-hardening, backport from 0.3.3.1-alpha):
  10905. - Improve the performance of our consensus-diff application code
  10906. when Tor is built with the --enable-fragile-hardening option set.
  10907. Fixes bug 24826; bugfix on 0.3.1.1-alpha.
  10908. o Minor bugfixes (OSX, backport from 0.3.3.1-alpha):
  10909. - Don't exit the Tor process if setrlimit() fails to change the file
  10910. limit (which can happen sometimes on some versions of OSX). Fixes
  10911. bug 21074; bugfix on 0.0.9pre5.
  10912. o Minor bugfixes (portability, msvc, backport from 0.3.2.9):
  10913. - Fix a bug in the bit-counting parts of our timing-wheel code on
  10914. MSVC. (Note that MSVC is still not a supported build platform, due
  10915. to cyptographic timing channel risks.) Fixes bug 24633; bugfix
  10916. on 0.2.9.1-alpha.
  10917. o Minor bugfixes (relay, partial backport):
  10918. - Make the internal channel_is_client() function look at what sort
  10919. of connection handshake the other side used, rather than whether
  10920. the other side ever sent a create_fast cell to us. Backports part
  10921. of the fixes from bugs 22805 and 24898.
  10922. o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha):
  10923. - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
  10924. 0.2.9.4-alpha.
  10925. - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
  10926. bugfix on 0.2.9.4-alpha.
  10927. o Code simplification and refactoring (backport from 0.3.3.3-alpha):
  10928. - Update the "rust dependencies" submodule to be a project-level
  10929. repository, rather than a user repository. Closes ticket 25323.
  10930. Changes in version 0.2.9.15 - 2018-03-03
  10931. Tor 0.2.9.15 backports important security and stability bugfixes from
  10932. later Tor releases.
  10933. It includes an important security fix for a remote crash attack
  10934. against directory authorities, tracked as TROVE-2018-001.
  10935. This release also backports our new system for improved resistance to
  10936. denial-of-service attacks against relays.
  10937. This release also fixes several minor bugs and annoyances from
  10938. earlier releases.
  10939. All directory authorities should upgrade to one of the versions
  10940. released today. Relays running 0.2.9.x may wish to update to one of
  10941. the versions released today, for the DoS mitigations.
  10942. o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha):
  10943. - Fix a protocol-list handling bug that could be used to remotely crash
  10944. directory authorities with a null-pointer exception. Fixes bug 25074;
  10945. bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
  10946. CVE-2018-0490.
  10947. o Major features (denial-of-service mitigation):
  10948. - Give relays some defenses against the recent network overload. We
  10949. start with three defenses (default parameters in parentheses).
  10950. First: if a single client address makes too many concurrent
  10951. connections (>100), hang up on further connections. Second: if a
  10952. single client address makes circuits too quickly (more than 3 per
  10953. second, with an allowed burst of 90) while also having too many
  10954. connections open (3), refuse new create cells for the next while
  10955. (1-2 hours). Third: if a client asks to establish a rendezvous
  10956. point to you directly, ignore the request. These defenses can be
  10957. manually controlled by new torrc options, but relays will also
  10958. take guidance from consensus parameters, so there's no need to
  10959. configure anything manually. Implements ticket 24902.
  10960. o Major bugfixes (bootstrapping):
  10961. - Fetch descriptors aggressively whenever we lack enough to build
  10962. circuits, regardless of how many descriptors we are missing.
  10963. Previously, we would delay launching the fetch when we had fewer
  10964. than 15 missing descriptors, even if some of those descriptors
  10965. were blocking circuits from building. Fixes bug 23985; bugfix on
  10966. 0.1.1.11-alpha. The effects of this bug became worse in
  10967. 0.3.0.3-alpha, when we began treating missing descriptors from our
  10968. primary guards as a reason to delay circuits.
  10969. o Major bugfixes (onion services, retry behavior):
  10970. - Fix an "off by 2" error in counting rendezvous failures on the
  10971. onion service side. While we thought we would stop the rendezvous
  10972. attempt after one failed circuit, we were actually making three
  10973. circuit attempts before giving up. Now switch to a default of 2,
  10974. and allow the consensus parameter "hs_service_max_rdv_failures" to
  10975. override. Fixes bug 24895; bugfix on 0.0.6.
  10976. o Minor feature (relay statistics):
  10977. - Change relay bandwidth reporting stats interval from 4 hours to 24
  10978. hours in order to reduce the efficiency of guard discovery
  10979. attacks. Fixes ticket 23856.
  10980. o Minor features (compatibility, OpenSSL):
  10981. - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
  10982. Previous versions of Tor would not have worked with OpenSSL 1.1.1,
  10983. since they neither disabled TLS 1.3 nor enabled any of the
  10984. ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
  10985. Closes ticket 24978.
  10986. o Minor features (denial-of-service avoidance):
  10987. - Make our OOM handler aware of the geoip client history cache so it
  10988. doesn't fill up the memory. This check is important for IPv6 and
  10989. our DoS mitigation subsystem. Closes ticket 25122.
  10990. o Minor features (fallback directory mirrors):
  10991. - The fallback directory list has been re-generated based on the
  10992. current status of the network. Tor uses fallback directories to
  10993. bootstrap when it doesn't yet have up-to-date directory
  10994. information. Closes ticket 24801.
  10995. - Make the default DirAuthorityFallbackRate 0.1, so that clients
  10996. prefer to bootstrap from fallback directory mirrors. This is a
  10997. follow-up to 24679, which removed weights from the default
  10998. fallbacks. Implements ticket 24681.
  10999. o Minor features (geoip):
  11000. - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
  11001. Country database.
  11002. o Minor features (linux seccomp2 sandbox):
  11003. - Update the sandbox rules so that they should now work correctly
  11004. with Glibc 2.26. Closes ticket 24315.
  11005. o Minor bugfix (channel connection):
  11006. - Use the actual observed address of an incoming relay connection,
  11007. not the canonical address of the relay from its descriptor, when
  11008. making decisions about how to handle the incoming connection.
  11009. Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
  11010. o Minor bugfix (directory authority):
  11011. - Directory authorities, when refusing a descriptor from a rejected
  11012. relay, now explicitly tell the relay (in its logs) to set a valid
  11013. ContactInfo address and contact the bad-relays@ mailing list.
  11014. Fixes bug 25170; bugfix on 0.2.9.1.
  11015. o Minor bugfixes (address selection):
  11016. - When the fascist_firewall_choose_address_ functions don't find a
  11017. reachable address, set the returned address to the null address
  11018. and port. This is a precautionary measure, because some callers do
  11019. not check the return value. Fixes bug 24736; bugfix
  11020. on 0.2.8.2-alpha.
  11021. o Minor bugfixes (compilation):
  11022. - Fix a signed/unsigned comparison warning introduced by our fix to
  11023. TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16.
  11024. o Minor bugfixes (control port, linux seccomp2 sandbox):
  11025. - Avoid a crash when attempting to use the seccomp2 sandbox together
  11026. with the OwningControllerProcess feature. Fixes bug 24198; bugfix
  11027. on 0.2.5.1-alpha.
  11028. o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha):
  11029. - Fix a possible crash on malformed consensus. If a consensus had
  11030. contained an unparseable protocol line, it could have made clients
  11031. and relays crash with a null-pointer exception. To exploit this
  11032. issue, however, an attacker would need to be able to subvert the
  11033. directory authority system. Fixes bug 25251; bugfix on
  11034. 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
  11035. o Minor bugfixes (memory usage):
  11036. - When queuing DESTROY cells on a channel, only queue the circuit-id
  11037. and reason fields: not the entire 514-byte cell. This fix should
  11038. help mitigate any bugs or attacks that fill up these queues, and
  11039. free more RAM for other uses. Fixes bug 24666; bugfix
  11040. on 0.2.5.1-alpha.
  11041. o Minor bugfixes (network layer):
  11042. - When closing a connection via close_connection_immediately(), we
  11043. mark it as "not blocked on bandwidth", to prevent later calls from
  11044. trying to unblock it, and give it permission to read. This fixes a
  11045. backtrace warning that can happen on relays under various
  11046. circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc.
  11047. o Minor bugfixes (OSX):
  11048. - Don't exit the Tor process if setrlimit() fails to change the file
  11049. limit (which can happen sometimes on some versions of OSX). Fixes
  11050. bug 21074; bugfix on 0.0.9pre5.
  11051. o Minor bugfixes (path selection):
  11052. - When selecting relays by bandwidth, avoid a rounding error that
  11053. could sometimes cause load to be imbalanced incorrectly.
  11054. Previously, we would always round upwards; now, we round towards
  11055. the nearest integer. This had the biggest effect when a relay's
  11056. weight adjustments should have given it weight 0, but it got
  11057. weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha.
  11058. - When calculating the fraction of nodes that have descriptors, and
  11059. all nodes in the network have zero bandwidths, count the number of
  11060. nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha.
  11061. - Actually log the total bandwidth in compute_weighted_bandwidths().
  11062. Fixes bug 24170; bugfix on 0.2.4.3-alpha.
  11063. o Minor bugfixes (portability, msvc):
  11064. - Fix a bug in the bit-counting parts of our timing-wheel code on
  11065. MSVC. (Note that MSVC is still not a supported build platform, due
  11066. to cryptographic timing channel risks.) Fixes bug 24633; bugfix
  11067. on 0.2.9.1-alpha.
  11068. o Minor bugfixes (relay):
  11069. - Make the internal channel_is_client() function look at what sort
  11070. of connection handshake the other side used, rather than whether
  11071. the other side ever sent a create_fast cell to us. Backports part
  11072. of the fixes from bugs 22805 and 24898.
  11073. o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha):
  11074. - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
  11075. 0.2.9.4-alpha.
  11076. - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
  11077. bugfix on 0.2.9.4-alpha.
  11078. Changes in version 0.3.2.10 - 2018-03-03
  11079. Tor 0.3.2.10 is the second stable release in the 0.3.2 series. It
  11080. backports a number of bugfixes, including important fixes for security
  11081. issues.
  11082. It includes an important security fix for a remote crash attack
  11083. against directory authorities, tracked as TROVE-2018-001.
  11084. Additionally, it backports a fix for a bug whose severity we have
  11085. upgraded: Bug 24700, which was fixed in 0.3.3.2-alpha, can be remotely
  11086. triggered in order to crash relays with a use-after-free pattern. As
  11087. such, we are now tracking that bug as TROVE-2018-002 and
  11088. CVE-2018-0491, and backporting it to earlier releases. This bug
  11089. affected versions 0.3.2.1-alpha through 0.3.2.9, as well as version
  11090. 0.3.3.1-alpha.
  11091. This release also backports our new system for improved resistance to
  11092. denial-of-service attacks against relays.
  11093. This release also fixes several minor bugs and annoyances from
  11094. earlier releases.
  11095. Relays running 0.3.2.x SHOULD upgrade to one of the versions released
  11096. today, for the fix to TROVE-2018-002. Directory authorities should
  11097. also upgrade. (Relays on earlier versions might want to update too for
  11098. the DoS mitigations.)
  11099. o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha):
  11100. - Fix a protocol-list handling bug that could be used to remotely crash
  11101. directory authorities with a null-pointer exception. Fixes bug 25074;
  11102. bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
  11103. CVE-2018-0490.
  11104. o Major bugfixes (scheduler, KIST, denial-of-service, backport from 0.3.3.2-alpha):
  11105. - Avoid adding the same channel twice in the KIST scheduler pending
  11106. list, which could lead to remote denial-of-service use-after-free
  11107. attacks against relays. Fixes bug 24700; bugfix on 0.3.2.1-alpha.
  11108. o Major features (denial-of-service mitigation, backport from 0.3.3.2-alpha):
  11109. - Give relays some defenses against the recent network overload. We
  11110. start with three defenses (default parameters in parentheses).
  11111. First: if a single client address makes too many concurrent
  11112. connections (>100), hang up on further connections. Second: if a
  11113. single client address makes circuits too quickly (more than 3 per
  11114. second, with an allowed burst of 90) while also having too many
  11115. connections open (3), refuse new create cells for the next while
  11116. (1-2 hours). Third: if a client asks to establish a rendezvous
  11117. point to you directly, ignore the request. These defenses can be
  11118. manually controlled by new torrc options, but relays will also
  11119. take guidance from consensus parameters, so there's no need to
  11120. configure anything manually. Implements ticket 24902.
  11121. o Major bugfixes (onion services, retry behavior, backport from 0.3.3.1-alpha):
  11122. - Fix an "off by 2" error in counting rendezvous failures on the
  11123. onion service side. While we thought we would stop the rendezvous
  11124. attempt after one failed circuit, we were actually making three
  11125. circuit attempts before giving up. Now switch to a default of 2,
  11126. and allow the consensus parameter "hs_service_max_rdv_failures" to
  11127. override. Fixes bug 24895; bugfix on 0.0.6.
  11128. - New-style (v3) onion services now obey the "max rendezvous circuit
  11129. attempts" logic. Previously they would make as many rendezvous
  11130. circuit attempts as they could fit in the MAX_REND_TIMEOUT second
  11131. window before giving up. Fixes bug 24894; bugfix on 0.3.2.1-alpha.
  11132. o Major bugfixes (protocol versions, backport from 0.3.3.2-alpha):
  11133. - Add Link protocol version 5 to the supported protocols list. Fixes
  11134. bug 25070; bugfix on 0.3.1.1-alpha.
  11135. o Major bugfixes (relay, backport from 0.3.3.1-alpha):
  11136. - Fix a set of false positives where relays would consider
  11137. connections to other relays as being client-only connections (and
  11138. thus e.g. deserving different link padding schemes) if those
  11139. relays fell out of the consensus briefly. Now we look only at the
  11140. initial handshake and whether the connection authenticated as a
  11141. relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha.
  11142. o Major bugfixes (scheduler, consensus, backport from 0.3.3.2-alpha):
  11143. - The scheduler subsystem was failing to promptly notice changes in
  11144. consensus parameters, making it harder to switch schedulers
  11145. network-wide. Fixes bug 24975; bugfix on 0.3.2.1-alpha.
  11146. o Minor features (denial-of-service avoidance, backport from 0.3.3.2-alpha):
  11147. - Make our OOM handler aware of the geoip client history cache so it
  11148. doesn't fill up the memory. This check is important for IPv6 and
  11149. our DoS mitigation subsystem. Closes ticket 25122.
  11150. o Minor features (compatibility, OpenSSL, backport from 0.3.3.3-alpha):
  11151. - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
  11152. Previous versions of Tor would not have worked with OpenSSL 1.1.1,
  11153. since they neither disabled TLS 1.3 nor enabled any of the
  11154. ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
  11155. Closes ticket 24978.
  11156. o Minor features (geoip):
  11157. - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
  11158. Country database.
  11159. o Minor features (logging, diagnostic, backport from 0.3.3.2-alpha):
  11160. - When logging a failure to create an onion service's descriptor,
  11161. also log what the problem with the descriptor was. Diagnostic
  11162. for ticket 24972.
  11163. o Minor bugfix (channel connection, backport from 0.3.3.2-alpha):
  11164. - Use the actual observed address of an incoming relay connection,
  11165. not the canonical address of the relay from its descriptor, when
  11166. making decisions about how to handle the incoming connection.
  11167. Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
  11168. o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha):
  11169. - Fix a possible crash on malformed consensus. If a consensus had
  11170. contained an unparseable protocol line, it could have made clients
  11171. and relays crash with a null-pointer exception. To exploit this
  11172. issue, however, an attacker would need to be able to subvert the
  11173. directory authority system. Fixes bug 25251; bugfix on
  11174. 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
  11175. o Minor bugfix (directory authority, backport from 0.3.3.2-alpha):
  11176. - Directory authorities, when refusing a descriptor from a rejected
  11177. relay, now explicitly tell the relay (in its logs) to set a valid
  11178. ContactInfo address and contact the bad-relays@ mailing list.
  11179. Fixes bug 25170; bugfix on 0.2.9.1.
  11180. o Minor bugfixes (build, rust, backport from 0.3.3.1-alpha):
  11181. - When building with Rust on OSX, link against libresolv, to work
  11182. around the issue at https://github.com/rust-lang/rust/issues/46797.
  11183. Fixes bug 24652; bugfix on 0.3.1.1-alpha.
  11184. o Minor bugfixes (onion services, backport from 0.3.3.2-alpha):
  11185. - Remove a BUG() statement when a client fetches an onion descriptor
  11186. that has a lower revision counter than the one in its cache. This
  11187. can happen in normal circumstances due to HSDir desync. Fixes bug
  11188. 24976; bugfix on 0.3.2.1-alpha.
  11189. o Minor bugfixes (logging, backport from 0.3.3.2-alpha):
  11190. - Don't treat inability to store a cached consensus object as a bug:
  11191. it can happen normally when we are out of disk space. Fixes bug
  11192. 24859; bugfix on 0.3.1.1-alpha.
  11193. o Minor bugfixes (performance, fragile-hardening, backport from 0.3.3.1-alpha):
  11194. - Improve the performance of our consensus-diff application code
  11195. when Tor is built with the --enable-fragile-hardening option set.
  11196. Fixes bug 24826; bugfix on 0.3.1.1-alpha.
  11197. o Minor bugfixes (OSX, backport from 0.3.3.1-alpha):
  11198. - Don't exit the Tor process if setrlimit() fails to change the file
  11199. limit (which can happen sometimes on some versions of OSX). Fixes
  11200. bug 21074; bugfix on 0.0.9pre5.
  11201. o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha):
  11202. - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
  11203. 0.2.9.4-alpha.
  11204. - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
  11205. bugfix on 0.2.9.4-alpha.
  11206. o Minor bugfixes (testing, backport from 0.3.3.1-alpha):
  11207. - Fix a memory leak in the scheduler/loop_kist unit test. Fixes bug
  11208. 25005; bugfix on 0.3.2.7-rc.
  11209. o Minor bugfixes (v3 onion services, backport from 0.3.3.2-alpha):
  11210. - Look at the "HSRend" protocol version, not the "HSDir" protocol
  11211. version, when deciding whether a consensus entry can support the
  11212. v3 onion service protocol as a rendezvous point. Fixes bug 25105;
  11213. bugfix on 0.3.2.1-alpha.
  11214. o Code simplification and refactoring (backport from 0.3.3.3-alpha):
  11215. - Update the "rust dependencies" submodule to be a project-level
  11216. repository, rather than a user repository. Closes ticket 25323.
  11217. o Documentation (backport from 0.3.3.1-alpha)
  11218. - Document that operators who run more than one relay or bridge are
  11219. expected to set MyFamily and ContactInfo correctly. Closes
  11220. ticket 24526.
  11221. Changes in version 0.3.3.3-alpha - 2018-03-03
  11222. Tor 0.3.3.3-alpha is the third alpha release for the 0.3.3.x series.
  11223. It includes an important security fix for a remote crash attack
  11224. against directory authorities tracked as TROVE-2018-001.
  11225. Additionally, with this release, we are upgrading the severity of a
  11226. bug fixed in 0.3.3.2-alpha. Bug 24700, which was fixed in
  11227. 0.3.3.2-alpha, can be remotely triggered in order to crash relays with
  11228. a use-after-free pattern. As such, we are now tracking that bug as
  11229. TROVE-2018-002 and CVE-2018-0491. This bug affected versions
  11230. 0.3.2.1-alpha through 0.3.2.9, as well as 0.3.3.1-alpha.
  11231. This release also fixes several minor bugs and annoyances from
  11232. earlier releases.
  11233. Relays running 0.3.2.x should upgrade to one of the versions released
  11234. today, for the fix to TROVE-2018-002. Directory authorities should
  11235. also upgrade. (Relays on earlier versions might want to update too for
  11236. the DoS mitigations.)
  11237. o Major bugfixes (denial-of-service, directory authority):
  11238. - Fix a protocol-list handling bug that could be used to remotely crash
  11239. directory authorities with a null-pointer exception. Fixes bug 25074;
  11240. bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
  11241. CVE-2018-0490.
  11242. o Minor features (compatibility, OpenSSL):
  11243. - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
  11244. Previous versions of Tor would not have worked with OpenSSL 1.1.1,
  11245. since they neither disabled TLS 1.3 nor enabled any of the
  11246. ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
  11247. Closes ticket 24978.
  11248. o Minor features (logging):
  11249. - Clarify the log messages produced when getrandom() or a related
  11250. entropy-generation mechanism gives an error. Closes ticket 25120.
  11251. o Minor features (testing):
  11252. - Add a "make test-rust" target to run the rust tests only. Closes
  11253. ticket 25071.
  11254. o Minor bugfixes (denial-of-service):
  11255. - Fix a possible crash on malformed consensus. If a consensus had
  11256. contained an unparseable protocol line, it could have made clients
  11257. and relays crash with a null-pointer exception. To exploit this
  11258. issue, however, an attacker would need to be able to subvert the
  11259. directory authority system. Fixes bug 25251; bugfix on
  11260. 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
  11261. o Minor bugfixes (DoS mitigation):
  11262. - Add extra safety checks when refilling the circuit creation bucket
  11263. to ensure we never set a value above the allowed maximum burst.
  11264. Fixes bug 25202; bugfix on 0.3.3.2-alpha.
  11265. - When a new consensus arrives, don't update our DoS-mitigation
  11266. parameters if we aren't a public relay. Fixes bug 25223; bugfix
  11267. on 0.3.3.2-alpha.
  11268. o Minor bugfixes (man page, SocksPort):
  11269. - Remove dead code from the old "SocksSocket" option, and rename
  11270. SocksSocketsGroupWritable to UnixSocksGroupWritable. The old option
  11271. still works, but is deprecated. Fixes bug 24343; bugfix on 0.2.6.3.
  11272. o Minor bugfixes (performance):
  11273. - Reduce the number of circuits that will be opened at once during
  11274. the circuit build timeout phase. This is done by increasing the
  11275. idle timeout to 3 minutes, and lowering the maximum number of
  11276. concurrent learning circuits to 10. Fixes bug 24769; bugfix
  11277. on 0.3.1.1-alpha.
  11278. o Minor bugfixes (spec conformance):
  11279. - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
  11280. 0.2.9.4-alpha.
  11281. - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
  11282. bugfix on 0.2.9.4-alpha.
  11283. o Minor bugfixes (spec conformance, rust):
  11284. - Resolve a denial-of-service issue caused by an infinite loop in
  11285. the rust protover code. Fixes bug 25250, bugfix on 0.3.3.1-alpha.
  11286. Also tracked as TROVE-2018-003.
  11287. o Code simplification and refactoring:
  11288. - Update the "rust dependencies" submodule to be a project-level
  11289. repository, rather than a user repository. Closes ticket 25323.
  11290. Changes in version 0.3.3.2-alpha - 2018-02-10
  11291. Tor 0.3.3.2-alpha is the second alpha in the 0.3.3.x series. It
  11292. introduces a mechanism to handle the high loads that many relay
  11293. operators have been reporting recently. It also fixes several bugs in
  11294. older releases. If this new code proves reliable, we plan to backport
  11295. it to older supported release series.
  11296. o Major features (denial-of-service mitigation):
  11297. - Give relays some defenses against the recent network overload. We
  11298. start with three defenses (default parameters in parentheses).
  11299. First: if a single client address makes too many concurrent
  11300. connections (>100), hang up on further connections. Second: if a
  11301. single client address makes circuits too quickly (more than 3 per
  11302. second, with an allowed burst of 90) while also having too many
  11303. connections open (3), refuse new create cells for the next while
  11304. (1-2 hours). Third: if a client asks to establish a rendezvous
  11305. point to you directly, ignore the request. These defenses can be
  11306. manually controlled by new torrc options, but relays will also
  11307. take guidance from consensus parameters, so there's no need to
  11308. configure anything manually. Implements ticket 24902.
  11309. o Major bugfixes (netflow padding):
  11310. - Stop adding unneeded channel padding right after we finish
  11311. flushing to a connection that has been trying to flush for many
  11312. seconds. Instead, treat all partial or complete flushes as
  11313. activity on the channel, which will defer the time until we need
  11314. to add padding. This fix should resolve confusing and scary log
  11315. messages like "Channel padding timeout scheduled 221453ms in the
  11316. past." Fixes bug 22212; bugfix on 0.3.1.1-alpha.
  11317. o Major bugfixes (protocol versions):
  11318. - Add Link protocol version 5 to the supported protocols list. Fixes
  11319. bug 25070; bugfix on 0.3.1.1-alpha.
  11320. o Major bugfixes (scheduler, consensus):
  11321. - The scheduler subsystem was failing to promptly notice changes in
  11322. consensus parameters, making it harder to switch schedulers
  11323. network-wide. Fixes bug 24975; bugfix on 0.3.2.1-alpha.
  11324. o Minor features (denial-of-service avoidance):
  11325. - Make our OOM handler aware of the geoip client history cache so it
  11326. doesn't fill up the memory. This check is important for IPv6 and
  11327. our DoS mitigation subsystem. Closes ticket 25122.
  11328. o Minor features (directory authority):
  11329. - When directory authorities are unable to add signatures to a
  11330. pending consensus, log the reason why. Closes ticket 24849.
  11331. o Minor features (geoip):
  11332. - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
  11333. Country database.
  11334. o Minor features (logging, diagnostic):
  11335. - When logging a failure to create an onion service's descriptor,
  11336. also log what the problem with the descriptor was. Diagnostic for
  11337. ticket 24972.
  11338. o Minor bugfix (channel connection):
  11339. - Use the actual observed address of an incoming relay connection,
  11340. not the canonical address of the relay from its descriptor, when
  11341. making decisions about how to handle the incoming connection.
  11342. Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
  11343. o Minor bugfix (directory authority):
  11344. - Directory authorities, when refusing a descriptor from a rejected
  11345. relay, now explicitly tell the relay (in its logs) to set a valid
  11346. ContactInfo address and contact the bad-relays@ mailing list.
  11347. Fixes bug 25170; bugfix on 0.2.9.1.
  11348. o Minor bugfixes (all versions of Tor):
  11349. - Use the "misspell" tool to detect and fix typos throughout the
  11350. source code. Fixes bug 23650; bugfix on various versions of Tor.
  11351. Patch from Deepesh Pathak.
  11352. o Minor bugfixes (circuit, cannibalization):
  11353. - Don't cannibalize preemptively-built circuits if we no longer
  11354. recognize their first hop. This situation can happen if our Guard
  11355. relay went off the consensus after the circuit was created. Fixes
  11356. bug 24469; bugfix on 0.0.6.
  11357. o Minor bugfixes (correctness):
  11358. - Remove a nonworking, unnecessary check to see whether a circuit
  11359. hop's identity digest was set when the circuit failed. Fixes bug
  11360. 24927; bugfix on 0.2.4.4-alpha.
  11361. o Minor bugfixes (logging):
  11362. - Don't treat inability to store a cached consensus object as a bug:
  11363. it can happen normally when we are out of disk space. Fixes bug
  11364. 24859; bugfix on 0.3.1.1-alpha.
  11365. - Fix a (mostly harmless) race condition when invoking
  11366. LOG_PROTOCOL_WARN message from a subthread while the torrc options
  11367. are changing. Fixes bug 23954; bugfix on 0.1.1.9-alpha.
  11368. o Minor bugfixes (onion services):
  11369. - Remove a BUG() statement when a client fetches an onion descriptor
  11370. that has a lower revision counter than the one in its cache. This
  11371. can happen in normal circumstances due to HSDir desync. Fixes bug
  11372. 24976; bugfix on 0.3.2.1-alpha.
  11373. - If we are configured to offer a single onion service, don't log
  11374. long-term established one hop rendezvous points in the heartbeat.
  11375. Fixes bug 25116; bugfix on 0.2.9.6-rc.
  11376. o Minor bugfixes (performance):
  11377. - Avoid calling protocol_list_supports_protocol() from inside tight
  11378. loops when running with cached routerinfo_t objects. Instead,
  11379. summarize the relevant protocols as flags in the routerinfo_t, as
  11380. we do for routerstatus_t objects. This change simplifies our code
  11381. a little, and saves a large amount of short-term memory allocation
  11382. operations. Fixes bug 25008; bugfix on 0.2.9.4-alpha.
  11383. o Minor bugfixes (Rust FFI):
  11384. - Fix a minor memory leak which would happen whenever the C code
  11385. would call the Rust implementation of
  11386. protover_get_supported_protocols(). This was due to the C version
  11387. returning a static string, whereas the Rust version newly allocated
  11388. a CString to pass across the FFI boundary. Consequently, the C
  11389. code was not expecting to need to free() what it was given. Fixes
  11390. bug 25127; bugfix on 0.3.2.1-alpha.
  11391. o Minor bugfixes (scheduler, KIST):
  11392. - Avoid adding the same channel twice in the KIST scheduler pending
  11393. list, which would waste CPU cycles. Fixes bug 24700; bugfix
  11394. on 0.3.2.1-alpha.
  11395. o Minor bugfixes (unit test, monotonic time):
  11396. - Increase a constant (1msec to 10msec) in the monotonic time test
  11397. that makes sure the nsec/usec/msec times read are synchronized.
  11398. This change was needed to accommodate slow systems like armel or
  11399. when the clock_gettime() is not a VDSO on the running kernel.
  11400. Fixes bug 25113; bugfix on 0.2.9.1.
  11401. o Minor bugfixes (v3 onion services):
  11402. - Look at the "HSRend" protocol version, not the "HSDir" protocol
  11403. version, when deciding whether a consensus entry can support the
  11404. v3 onion service protocol as a rendezvous point. Fixes bug 25105;
  11405. bugfix on 0.3.2.1-alpha.
  11406. o Code simplification and refactoring:
  11407. - Remove the unused nodelist_recompute_all_hsdir_indices(). Closes
  11408. ticket 25108.
  11409. - Remove a series of counters used to track circuit extend attempts
  11410. and connection status but that in reality we aren't using for
  11411. anything other than stats logged by a SIGUSR1 signal. Closes
  11412. ticket 25163.
  11413. o Documentation (man page):
  11414. - The HiddenServiceVersion torrc option accepts only one number:
  11415. either version 2 or 3. Closes ticket 25026; bugfix
  11416. on 0.3.2.2-alpha.
  11417. Changes in version 0.3.3.1-alpha - 2018-01-25
  11418. Tor 0.3.3.1-alpha is the first release in the 0.3.3.x series. It adds
  11419. several new features to Tor, including several improvements to
  11420. bootstrapping, and support for an experimental "vanguards" feature to
  11421. resist guard discovery attacks. This series also includes better
  11422. support for applications that need to embed Tor or manage v3
  11423. onion services.
  11424. o Major features (embedding):
  11425. - There is now a documented stable API for programs that need to
  11426. embed Tor. See tor_api.h for full documentation and known bugs.
  11427. Closes ticket 23684.
  11428. - Tor now has support for restarting in the same process.
  11429. Controllers that run Tor using the "tor_api.h" interface can now
  11430. restart Tor after Tor has exited. This support is incomplete,
  11431. however: we fixed crash bugs that prevented it from working at
  11432. all, but many bugs probably remain, including a possibility of
  11433. security issues. Implements ticket 24581.
  11434. o Major features (IPv6, directory documents):
  11435. - Add consensus method 27, which adds IPv6 ORPorts to the microdesc
  11436. consensus. This information makes it easier for IPv6 clients to
  11437. bootstrap and choose reachable entry guards. Implements ticket 23826.
  11438. - Add consensus method 28, which removes IPv6 ORPorts from
  11439. microdescriptors. Now that the consensus contains IPv6 ORPorts, they
  11440. are redundant in microdescs. This change will be used by Tor clients
  11441. on 0.2.8.x and later. (That is to say, with all Tor clients that
  11442. have IPv6 bootstrap and guard support.) Implements ticket 23828.
  11443. - Expand the documentation for AuthDirHasIPv6Connectivity when it is
  11444. set by different numbers of authorities. Fixes 23870
  11445. on 0.2.4.1-alpha.
  11446. o Major features (onion service v3, control port):
  11447. - The control port now supports commands and events for v3 onion
  11448. services. It is now possible to create ephemeral v3 services using
  11449. ADD_ONION. Additionally, several events (HS_DESC, HS_DESC_CONTENT,
  11450. CIRC and CIRC_MINOR) and commands (GETINFO, HSPOST, ADD_ONION and
  11451. DEL_ONION) have been extended to support v3 onion services. Closes
  11452. ticket 20699; implements proposal 284.
  11453. o Major features (onion services):
  11454. - Provide torrc options to pin the second and third hops of onion
  11455. service circuits to a list of nodes. The option HSLayer2Guards
  11456. pins the second hop, and the option HSLayer3Guards pins the third
  11457. hop. These options are for use in conjunction with experiments
  11458. with "vanguards" for preventing guard enumeration attacks. Closes
  11459. ticket 13837.
  11460. o Major features (rust, portability, experimental):
  11461. - Tor now ships with an optional implementation of one of its
  11462. smaller modules (protover.c) in the Rust programming language. To
  11463. try it out, install a Rust build environment, and configure Tor
  11464. with "--enable-rust --enable-cargo-online-mode". This should not
  11465. cause any user-visible changes, but should help us gain more
  11466. experience with Rust, and plan future Rust integration work.
  11467. Implementation by Chelsea Komlo. Closes ticket 22840.
  11468. o Minor features (storage, configuration):
  11469. - Users can store cached directory documents somewhere other than
  11470. the DataDirectory by using the CacheDirectory option. Similarly,
  11471. the storage location for relay's keys can be overridden with the
  11472. KeyDirectory option. Closes ticket 22703.
  11473. o Major features (v3 onion services, ipv6):
  11474. - When v3 onion service clients send introduce cells, they now
  11475. include the IPv6 address of the rendezvous point, if it has one.
  11476. Current v3 onion services running 0.3.2 ignore IPv6 addresses, but
  11477. in future Tor versions, IPv6-only v3 single onion services will be
  11478. able to use IPv6 addresses to connect directly to the rendezvous
  11479. point. Closes ticket 23577. Patch by Neel Chauhan.
  11480. o Major bugfixes (onion services, retry behavior):
  11481. - Fix an "off by 2" error in counting rendezvous failures on the
  11482. onion service side. While we thought we would stop the rendezvous
  11483. attempt after one failed circuit, we were actually making three
  11484. circuit attempts before giving up. Now switch to a default of 2,
  11485. and allow the consensus parameter "hs_service_max_rdv_failures" to
  11486. override. Fixes bug 24895; bugfix on 0.0.6.
  11487. - New-style (v3) onion services now obey the "max rendezvous circuit
  11488. attempts" logic. Previously they would make as many rendezvous
  11489. circuit attempts as they could fit in the MAX_REND_TIMEOUT second
  11490. window before giving up. Fixes bug 24894; bugfix on 0.3.2.1-alpha.
  11491. o Major bugfixes (relays):
  11492. - Fix a set of false positives where relays would consider
  11493. connections to other relays as being client-only connections (and
  11494. thus e.g. deserving different link padding schemes) if those
  11495. relays fell out of the consensus briefly. Now we look only at the
  11496. initial handshake and whether the connection authenticated as a
  11497. relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha.
  11498. o Minor feature (IPv6):
  11499. - Make IPv6-only clients wait for microdescs for relays, even if we
  11500. were previously using descriptors (or were using them as a bridge)
  11501. and have a cached descriptor for them. Implements ticket 23827.
  11502. - When a consensus has IPv6 ORPorts, make IPv6-only clients use
  11503. them, rather than waiting to download microdescriptors.
  11504. Implements ticket 23827.
  11505. o Minor features (cleanup):
  11506. - Tor now deletes the CookieAuthFile and ExtORPortCookieAuthFile
  11507. when it stops. Closes ticket 23271.
  11508. o Minor features (defensive programming):
  11509. - Most of the functions in Tor that free objects have been replaced
  11510. with macros that free the objects and set the corresponding
  11511. pointers to NULL. This change should help prevent a large class of
  11512. dangling pointer bugs. Closes ticket 24337.
  11513. - Where possible, the tor_free() macro now only evaluates its input
  11514. once. Part of ticket 24337.
  11515. - Check that microdesc ed25519 ids are non-zero in
  11516. node_get_ed25519_id() before returning them. Implements ticket
  11517. 24001, patch by "aruna1234".
  11518. o Minor features (embedding):
  11519. - Tor can now start with a preauthenticated control connection
  11520. created by the process that launched it. This feature is meant for
  11521. use by programs that want to launch and manage a Tor process
  11522. without allowing other programs to manage it as well. For more
  11523. information, see the __OwningControllerFD option documented in
  11524. control-spec.txt. Closes ticket 23900.
  11525. - On most errors that would cause Tor to exit, it now tries to
  11526. return from the tor_main() function, rather than calling the
  11527. system exit() function. Most users won't notice a difference here,
  11528. but it should be significant for programs that run Tor inside
  11529. a separate thread: they should now be able to survive Tor's exit
  11530. conditions rather than having Tor shut down the entire process.
  11531. Closes ticket 23848.
  11532. - Applications that want to embed Tor can now tell Tor not to
  11533. register any of its own POSIX signal handlers, using the
  11534. __DisableSignalHandlers option. Closes ticket 24588.
  11535. o Minor features (fallback directory list):
  11536. - Avoid selecting fallbacks that change their IP addresses too
  11537. often. Select more fallbacks by ignoring the Guard flag, and
  11538. allowing lower cutoffs for the Running and V2Dir flags. Also allow
  11539. a lower bandwidth, and a higher number of fallbacks per operator
  11540. (5% of the list). Implements ticket 24785.
  11541. - Update the fallback whitelist and blacklist based on opt-ins and
  11542. relay changes. Closes tickets 22321, 24678, 22527, 24135,
  11543. and 24695.
  11544. o Minor features (fallback directory mirror configuration):
  11545. - Add a nickname to each fallback in a C comment. This makes it
  11546. easier for operators to find their relays, and allows stem to use
  11547. nicknames to identify fallbacks. Implements ticket 24600.
  11548. - Add a type and version header to the fallback directory mirror
  11549. file. Also add a delimiter to the end of each fallback entry. This
  11550. helps external parsers like stem and Relay Search. Implements
  11551. ticket 24725.
  11552. - Add an extrainfo cache flag for each fallback in a C comment. This
  11553. allows stem to use fallbacks to fetch extra-info documents, rather
  11554. than using authorities. Implements ticket 22759.
  11555. - Add the generateFallbackDirLine.py script for automatically
  11556. generating fallback directory mirror lines from relay fingerprints.
  11557. No more typos! Add the lookupFallbackDirContact.py script for
  11558. automatically looking up operator contact info from relay
  11559. fingerprints. Implements ticket 24706, patch by teor and atagar.
  11560. - Reject any fallback directory mirror that serves an expired
  11561. consensus. Implements ticket 20942, patch by "minik".
  11562. - Remove commas and equals signs from external string inputs to the
  11563. fallback list. This avoids format confusion attacks. Implements
  11564. ticket 24726.
  11565. - Remove the "weight=10" line from fallback directory mirror
  11566. entries. Ticket 24681 will maintain the current fallback weights
  11567. by changing Tor's default fallback weight to 10. Implements
  11568. ticket 24679.
  11569. - Stop logging excessive information about fallback netblocks.
  11570. Implements ticket 24791.
  11571. o Minor features (forward-compatibility):
  11572. - If a relay supports some link authentication protocol that we do
  11573. not recognize, then include that relay's ed25519 key when telling
  11574. other relays to extend to it. Previously, we treated future
  11575. versions as if they were too old to support ed25519 link
  11576. authentication. Closes ticket 20895.
  11577. o Minor features (heartbeat):
  11578. - Add onion service information to our heartbeat logs, displaying
  11579. stats about the activity of configured onion services. Closes
  11580. ticket 24896.
  11581. o Minor features (instrumentation, development):
  11582. - Add the MainloopStats option to allow developers to get
  11583. instrumentation information from the main event loop via the
  11584. heartbeat messages. We hope to use this to improve Tor's behavior
  11585. when it's trying to sleep. Closes ticket 24605.
  11586. o Minor features (log messages):
  11587. - Improve a warning message that happens when we fail to re-parse an
  11588. old router because of an expired certificate. Closes ticket 20020.
  11589. - Make the log more quantitative when we hit MaxMemInQueues
  11590. threshold exposing some values. Closes ticket 24501.
  11591. o Minor features (logging, android):
  11592. - Added support for the Android logging subsystem. Closes
  11593. ticket 24362.
  11594. o Minor features (performance):
  11595. - Support predictive circuit building for onion service circuits
  11596. with multiple layers of guards. Closes ticket 23101.
  11597. - Use stdatomic.h where available, rather than mutexes, to implement
  11598. atomic_counter_t. Closes ticket 23953.
  11599. o Minor features (performance, 32-bit):
  11600. - Improve performance on 32-bit systems by avoiding 64-bit division
  11601. when calculating the timestamp in milliseconds for channel padding
  11602. computations. Implements ticket 24613.
  11603. - Improve performance on 32-bit systems by avoiding 64-bit division
  11604. when timestamping cells and buffer chunks for OOM calculations.
  11605. Implements ticket 24374.
  11606. o Minor features (performance, OSX, iOS):
  11607. - Use the mach_approximate_time() function (when available) to
  11608. implement coarse monotonic time. Having a coarse time function
  11609. should avoid a large number of system calls, and improve
  11610. performance slightly, especially under load. Closes ticket 24427.
  11611. o Minor features (performance, windows):
  11612. - Improve performance on Windows Vista and Windows 7 by adjusting
  11613. TCP send window size according to the recommendation from
  11614. SIO_IDEAL_SEND_BACKLOG_QUERY. Closes ticket 22798. Patch
  11615. from Vort.
  11616. o Major features (relay):
  11617. - Implement an option, ReducedExitPolicy, to allow an Tor exit relay
  11618. operator to use a more reasonable ("reduced") exit policy, rather
  11619. than the default one. If you want to run an exit node without
  11620. thinking too hard about which ports to allow, this one is for you.
  11621. Closes ticket 13605. Patch from Neel Chauhan.
  11622. o Minor features (testing, debugging, embedding):
  11623. - For development purposes, Tor now has a mode in which it runs for
  11624. a few seconds, then stops, and starts again without exiting the
  11625. process. This mode is meant to help us debug various issues with
  11626. ticket 23847. To use this feature, compile with
  11627. --enable-restart-debugging, and set the TOR_DEBUG_RESTART
  11628. environment variable. This is expected to crash a lot, and is
  11629. really meant for developers only. It will likely be removed in a
  11630. future release. Implements ticket 24583.
  11631. o Minor bugfix (network IPv6 test):
  11632. - Tor's test scripts now check if "ping -6 ::1" works when the user
  11633. runs "make test-network-all". Fixes bug 24677; bugfix on
  11634. 0.2.9.3-alpha. Patch by "ffmancera".
  11635. o Minor bugfixes (build, rust):
  11636. - Fix output of autoconf checks to display success messages for Rust
  11637. dependencies and a suitable rustc compiler version. Fixes bug
  11638. 24612; bugfix on 0.3.1.3-alpha.
  11639. - When building with Rust on OSX, link against libresolv, to work
  11640. around the issue at https://github.com/rust-lang/rust/issues/46797.
  11641. Fixes bug 24652; bugfix on 0.3.1.1-alpha.
  11642. - Don't pass the --quiet option to cargo: it seems to suppress some
  11643. errors, which is not what we want to do when building. Fixes bug
  11644. 24518; bugfix on 0.3.1.7.
  11645. - Build correctly when building from outside Tor's source tree with
  11646. the TOR_RUST_DEPENDENCIES option set. Fixes bug 22768; bugfix
  11647. on 0.3.1.7.
  11648. o Minor bugfixes (directory authorities, IPv6):
  11649. - When creating a routerstatus (vote) from a routerinfo (descriptor),
  11650. set the IPv6 address to the unspecified IPv6 address, and
  11651. explicitly initialize the port to zero. Fixes bug 24488; bugfix
  11652. on 0.2.4.1-alpha.
  11653. o Minor bugfixes (fallback directory mirrors):
  11654. - Make updateFallbackDirs.py search harder for python. (Some OSs
  11655. don't put it in /usr/bin.) Fixes bug 24708; bugfix
  11656. on 0.2.8.1-alpha.
  11657. o Minor bugfixes (hibernation, bandwidth accounting, shutdown):
  11658. - When hibernating, close connections normally and allow them to
  11659. flush. Fixes bug 23571; bugfix on 0.2.4.7-alpha. Also fixes
  11660. bug 7267.
  11661. - Do not attempt to launch self-reachability tests when entering
  11662. hibernation. Fixes a case of bug 12062; bugfix on 0.0.9pre5.
  11663. - Resolve several bugs related to descriptor fetching on bridge
  11664. clients with bandwidth accounting enabled. (This combination is
  11665. not recommended!) Fixes a case of bug 12062; bugfix
  11666. on 0.2.0.3-alpha.
  11667. - When hibernating, do not attempt to launch DNS checks. Fixes a
  11668. case of bug 12062; bugfix on 0.1.2.2-alpha.
  11669. - When hibernating, do not try to upload or download descriptors.
  11670. Fixes a case of bug 12062; bugfix on 0.0.9pre5.
  11671. o Minor bugfixes (IPv6, bridges):
  11672. - Tor now always sets IPv6 preferences for bridges. Fixes bug 24573;
  11673. bugfix on 0.2.8.2-alpha.
  11674. - Tor now sets IPv6 address in the routerstatus as well as in the
  11675. router descriptors when updating addresses for a bridge. Closes
  11676. ticket 24572; bugfix on 0.2.4.5-alpha. Patch by "ffmancera".
  11677. o Minor bugfixes (linux seccomp2 sandbox):
  11678. - When running with the sandbox enabled, reload configuration files
  11679. correctly even when %include was used. Previously we would crash.
  11680. Fixes bug 22605; bugfix on 0.3.1. Patch from Daniel Pinto.
  11681. o Minor bugfixes (memory leaks):
  11682. - Avoid possible at-exit memory leaks related to use of Libevent's
  11683. event_base_once() function. (This function tends to leak memory if
  11684. the event_base is closed before the event fires.) Fixes bug 24584;
  11685. bugfix on 0.2.8.1-alpha.
  11686. - Fix a harmless memory leak in tor-resolve. Fixes bug 24582; bugfix
  11687. on 0.2.1.1-alpha.
  11688. o Minor bugfixes (OSX):
  11689. - Don't exit the Tor process if setrlimit() fails to change the file
  11690. limit (which can happen sometimes on some versions of OSX). Fixes
  11691. bug 21074; bugfix on 0.0.9pre5.
  11692. o Minor bugfixes (performance, fragile-hardening):
  11693. - Improve the performance of our consensus-diff application code
  11694. when Tor is built with the --enable-fragile-hardening option set.
  11695. Fixes bug 24826; bugfix on 0.3.1.1-alpha.
  11696. o Minor bugfixes (performance, timeouts):
  11697. - Consider circuits for timeout as soon as they complete a hop. This
  11698. is more accurate than applying the timeout in
  11699. circuit_expire_building() because that function is only called
  11700. once per second, which is now too slow for typical timeouts on the
  11701. current network. Fixes bug 23114; bugfix on 0.2.2.2-alpha.
  11702. - Use onion service circuits (and other circuits longer than 3 hops)
  11703. to calculate a circuit build timeout. Previously, Tor only
  11704. calculated its build timeout based on circuits that planned to be
  11705. exactly 3 hops long. With this change, we include measurements
  11706. from all circuits at the point where they complete their third
  11707. hop. Fixes bug 23100; bugfix on 0.2.2.2-alpha.
  11708. o Minor bugfixes (testing):
  11709. - Give out Exit flags in bootstrapping networks. Fixes bug 24137;
  11710. bugfix on 0.2.3.1-alpha.
  11711. - Fix a memory leak in the scheduler/loop_kist unit test. Fixes bug
  11712. 25005; bugfix on 0.3.2.7-rc.
  11713. o Code simplification and refactoring:
  11714. - Remove /usr/athena from search path in configure.ac. Closes
  11715. ticket 24363.
  11716. - Remove duplicate code in node_has_curve25519_onion_key() and
  11717. node_get_curve25519_onion_key(), and add a check for a zero
  11718. microdesc curve25519 onion key. Closes ticket 23966, patch by
  11719. "aruna1234" and teor.
  11720. - Rewrite channel_rsa_id_group_set_badness to reduce temporary
  11721. memory allocations with large numbers of OR connections (e.g.
  11722. relays). Closes ticket 24119.
  11723. - Separate the function that deletes ephemeral files when Tor
  11724. stops gracefully.
  11725. - Small changes to Tor's buf_t API to make it suitable for use as a
  11726. general-purpose safe string constructor. Closes ticket 22342.
  11727. - Switch -Wnormalized=id to -Wnormalized=nfkc in configure.ac to
  11728. avoid source code identifier confusion. Closes ticket 24467.
  11729. - The tor_git_revision[] constant no longer needs to be redeclared
  11730. by everything that links against the rest of Tor. Done as part of
  11731. ticket 23845, to simplify our external API.
  11732. - We make extend_info_from_node() use node_get_curve25519_onion_key()
  11733. introduced in ticket 23577 to access the curve25519 public keys
  11734. rather than accessing it directly. Closes ticket 23760. Patch by
  11735. Neel Chauhan.
  11736. - Add a function to log channels' scheduler state changes to aid
  11737. debugging efforts. Closes ticket 24531.
  11738. o Documentation:
  11739. - Add documentation on how to build tor with Rust dependencies
  11740. without having to be online. Closes ticket 22907; bugfix
  11741. on 0.3.0.3-alpha.
  11742. - Clarify the behavior of RelayBandwidth{Rate,Burst} with client
  11743. traffic. Closes ticket 24318.
  11744. - Document that OutboundBindAddress doesn't apply to DNS requests.
  11745. Closes ticket 22145. Patch from Aruna Maurya.
  11746. - Document that operators who run more than one relay or bridge are
  11747. expected to set MyFamily and ContactInfo correctly. Closes
  11748. ticket 24526.
  11749. o Code simplification and refactoring (channels):
  11750. - Remove the incoming and outgoing channel queues. These were never
  11751. used, but still took up a step in our fast path.
  11752. - The majority of the channel unit tests have been rewritten and the
  11753. code coverage has now been raised to 83.6% for channel.c. Closes
  11754. ticket 23709.
  11755. - Remove other dead code from the channel subsystem: All together,
  11756. this cleanup has removed more than 1500 lines of code overall and
  11757. adding very little except for unit test.
  11758. o Code simplification and refactoring (circuit rendezvous):
  11759. - Split the client-side rendezvous circuit lookup into two
  11760. functions: one that returns only established circuits and another
  11761. that returns all kinds of circuits. Closes ticket 23459.
  11762. o Code simplification and refactoring (controller):
  11763. - Make most of the variables in networkstatus_getinfo_by_purpose()
  11764. const. Implements ticket 24489.
  11765. Changes in version 0.3.2.9 - 2018-01-09
  11766. Tor 0.3.2.9 is the first stable release in the 0.3.2 series.
  11767. The 0.3.2 series includes our long-anticipated new onion service
  11768. design, with numerous security features. (For more information, see
  11769. our blog post at https://blog.torproject.org/fall-harvest.) We also
  11770. have a new circuit scheduler algorithm for improved performance on
  11771. relays everywhere (see https://blog.torproject.org/kist-and-tell),
  11772. along with many smaller features and bugfixes.
  11773. Per our stable release policy, we plan to support each stable release
  11774. series for at least the next nine months, or for three months after
  11775. the first stable release of the next series: whichever is longer. If
  11776. you need a release with long-term support, we recommend that you stay
  11777. with the 0.2.9 series.
  11778. Below is a list of the changes since 0.3.2.8-rc. For a list of all
  11779. changes since 0.3.1, see the ReleaseNotes file.
  11780. o Minor features (fallback directory mirrors):
  11781. - The fallback directory list has been re-generated based on the
  11782. current status of the network. Tor uses fallback directories to
  11783. bootstrap when it doesn't yet have up-to-date directory
  11784. information. Closes ticket 24801.
  11785. - Make the default DirAuthorityFallbackRate 0.1, so that clients
  11786. prefer to bootstrap from fallback directory mirrors. This is a
  11787. follow-up to 24679, which removed weights from the default
  11788. fallbacks. Implements ticket 24681.
  11789. o Minor features (geoip):
  11790. - Update geoip and geoip6 to the January 5 2018 Maxmind GeoLite2
  11791. Country database.
  11792. o Minor bugfixes (address selection):
  11793. - When the fascist_firewall_choose_address_ functions don't find a
  11794. reachable address, set the returned address to the null address
  11795. and port. This is a precautionary measure, because some callers do
  11796. not check the return value. Fixes bug 24736; bugfix
  11797. on 0.2.8.2-alpha.
  11798. o Minor bugfixes (compilation):
  11799. - Resolve a few shadowed-variable warnings in the onion service
  11800. code. Fixes bug 24634; bugfix on 0.3.2.1-alpha.
  11801. o Minor bugfixes (portability, msvc):
  11802. - Fix a bug in the bit-counting parts of our timing-wheel code on
  11803. MSVC. (Note that MSVC is still not a supported build platform, due
  11804. to cryptographic timing channel risks.) Fixes bug 24633; bugfix
  11805. on 0.2.9.1-alpha.
  11806. Changes in version 0.3.2.8-rc - 2017-12-21
  11807. Tor 0.3.2.8-rc fixes a pair of bugs in the KIST and KISTLite
  11808. schedulers that had led servers under heavy load to overload their
  11809. outgoing connections. All relay operators running earlier 0.3.2.x
  11810. versions should upgrade. This version also includes a mitigation for
  11811. over-full DESTROY queues leading to out-of-memory conditions: if it
  11812. works, we will soon backport it to earlier release series.
  11813. This is the second release candidate in the 0.3.2 series. If we find
  11814. no new bugs or regression here, then the first stable 0.3.2 release
  11815. will be nearly identical to this.
  11816. o Major bugfixes (KIST, scheduler):
  11817. - The KIST scheduler did not correctly account for data already
  11818. enqueued in each connection's send socket buffer, particularly in
  11819. cases when the TCP/IP congestion window was reduced between
  11820. scheduler calls. This situation lead to excessive per-connection
  11821. buffering in the kernel, and a potential memory DoS. Fixes bug
  11822. 24665; bugfix on 0.3.2.1-alpha.
  11823. o Minor features (geoip):
  11824. - Update geoip and geoip6 to the December 6 2017 Maxmind GeoLite2
  11825. Country database.
  11826. o Minor bugfixes (hidden service v3):
  11827. - Bump hsdir_spread_store parameter from 3 to 4 in order to increase
  11828. the probability of reaching a service for a client missing
  11829. microdescriptors. Fixes bug 24425; bugfix on 0.3.2.1-alpha.
  11830. o Minor bugfixes (memory usage):
  11831. - When queuing DESTROY cells on a channel, only queue the circuit-id
  11832. and reason fields: not the entire 514-byte cell. This fix should
  11833. help mitigate any bugs or attacks that fill up these queues, and
  11834. free more RAM for other uses. Fixes bug 24666; bugfix
  11835. on 0.2.5.1-alpha.
  11836. o Minor bugfixes (scheduler, KIST):
  11837. - Use a sane write limit for KISTLite when writing onto a connection
  11838. buffer instead of using INT_MAX and shoving as much as it can.
  11839. Because the OOM handler cleans up circuit queues, we are better
  11840. off at keeping them in that queue instead of the connection's
  11841. buffer. Fixes bug 24671; bugfix on 0.3.2.1-alpha.
  11842. Changes in version 0.3.2.7-rc - 2017-12-14
  11843. Tor 0.3.2.7-rc fixes various bugs in earlier versions of Tor,
  11844. including some that could affect reliability or correctness.
  11845. This is the first release candidate in the 0.3.2 series. If we find no
  11846. new bugs or regression here, then the first stable 0.3.2. release will
  11847. be nearly identical to this.
  11848. o Major bugfixes (circuit prediction):
  11849. - Fix circuit prediction logic so that a client doesn't treat a port
  11850. as being "handled" by a circuit if that circuit already has
  11851. isolation settings on it. This change should make Tor clients more
  11852. responsive by improving their chances of having a pre-created
  11853. circuit ready for use when a request arrives. Fixes bug 18859;
  11854. bugfix on 0.2.3.3-alpha.
  11855. o Minor features (logging):
  11856. - Provide better warnings when the getrandom() syscall fails. Closes
  11857. ticket 24500.
  11858. o Minor features (portability):
  11859. - Tor now compiles correctly on arm64 with libseccomp-dev installed.
  11860. (It doesn't yet work with the sandbox enabled.) Closes
  11861. ticket 24424.
  11862. o Minor bugfixes (bridge clients, bootstrap):
  11863. - Retry directory downloads when we get our first bridge descriptor
  11864. during bootstrap or while reconnecting to the network. Keep
  11865. retrying every time we get a bridge descriptor, until we have a
  11866. reachable bridge. Fixes part of bug 24367; bugfix on 0.2.0.3-alpha.
  11867. - Stop delaying bridge descriptor fetches when we have cached bridge
  11868. descriptors. Instead, only delay bridge descriptor fetches when we
  11869. have at least one reachable bridge. Fixes part of bug 24367;
  11870. bugfix on 0.2.0.3-alpha.
  11871. - Stop delaying directory fetches when we have cached bridge
  11872. descriptors. Instead, only delay bridge descriptor fetches when
  11873. all our bridges are definitely unreachable. Fixes part of bug
  11874. 24367; bugfix on 0.2.0.3-alpha.
  11875. o Minor bugfixes (compilation):
  11876. - Fix a signed/unsigned comparison warning introduced by our fix to
  11877. TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16.
  11878. o Minor bugfixes (correctness):
  11879. - Fix several places in our codebase where a C compiler would be
  11880. likely to eliminate a check, based on assuming that undefined
  11881. behavior had not happened elsewhere in the code. These cases are
  11882. usually a sign of redundant checking or dubious arithmetic. Found
  11883. by Georg Koppen using the "STACK" tool from Wang, Zeldovich,
  11884. Kaashoek, and Solar-Lezama. Fixes bug 24423; bugfix on various
  11885. Tor versions.
  11886. o Minor bugfixes (onion service v3):
  11887. - Fix a race where an onion service would launch a new intro circuit
  11888. after closing an old one, but fail to register it before freeing
  11889. the previously closed circuit. This bug was making the service
  11890. unable to find the established intro circuit and thus not upload
  11891. its descriptor, thus making a service unavailable for up to 24
  11892. hours. Fixes bug 23603; bugfix on 0.3.2.1-alpha.
  11893. o Minor bugfixes (scheduler, KIST):
  11894. - Properly set the scheduler state of an unopened channel in the
  11895. KIST scheduler main loop. This prevents a harmless but annoying
  11896. log warning. Fixes bug 24502; bugfix on 0.3.2.4-alpha.
  11897. - Avoid a possible integer overflow when computing the available
  11898. space on the TCP buffer of a channel. This had no security
  11899. implications; but could make KIST allow too many cells on a
  11900. saturated connection. Fixes bug 24590; bugfix on 0.3.2.1-alpha.
  11901. - Downgrade to "info" a harmless warning about the monotonic time
  11902. moving backwards: This can happen on platform not supporting
  11903. monotonic time. Fixes bug 23696; bugfix on 0.3.2.1-alpha.
  11904. Changes in version 0.3.2.6-alpha - 2017-12-01
  11905. This version of Tor is the latest in the 0.3.2 alpha series. It
  11906. includes fixes for several important security issues. All Tor users
  11907. should upgrade to this release, or to one of the other releases coming
  11908. out today.
  11909. o Major bugfixes (security):
  11910. - Fix a denial of service bug where an attacker could use a
  11911. malformed directory object to cause a Tor instance to pause while
  11912. OpenSSL would try to read a passphrase from the terminal. (Tor
  11913. instances run without a terminal, which is the case for most Tor
  11914. packages, are not impacted.) Fixes bug 24246; bugfix on every
  11915. version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
  11916. Found by OSS-Fuzz as testcase 6360145429790720.
  11917. - Fix a denial of service issue where an attacker could crash a
  11918. directory authority using a malformed router descriptor. Fixes bug
  11919. 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
  11920. and CVE-2017-8820.
  11921. - When checking for replays in the INTRODUCE1 cell data for a
  11922. (legacy) onion service, correctly detect replays in the RSA-
  11923. encrypted part of the cell. We were previously checking for
  11924. replays on the entire cell, but those can be circumvented due to
  11925. the malleability of Tor's legacy hybrid encryption. This fix helps
  11926. prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
  11927. 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
  11928. and CVE-2017-8819.
  11929. o Major bugfixes (security, onion service v2):
  11930. - Fix a use-after-free error that could crash v2 Tor onion services
  11931. when they failed to open circuits while expiring introduction
  11932. points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
  11933. also tracked as TROVE-2017-013 and CVE-2017-8823.
  11934. o Major bugfixes (security, relay):
  11935. - When running as a relay, make sure that we never build a path
  11936. through ourselves, even in the case where we have somehow lost the
  11937. version of our descriptor appearing in the consensus. Fixes part
  11938. of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
  11939. as TROVE-2017-012 and CVE-2017-8822.
  11940. - When running as a relay, make sure that we never choose ourselves
  11941. as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This
  11942. issue is also tracked as TROVE-2017-012 and CVE-2017-8822.
  11943. o Minor feature (relay statistics):
  11944. - Change relay bandwidth reporting stats interval from 4 hours to 24
  11945. hours in order to reduce the efficiency of guard discovery
  11946. attacks. Fixes ticket 23856.
  11947. o Minor features (directory authority):
  11948. - Add an IPv6 address for the "bastet" directory authority. Closes
  11949. ticket 24394.
  11950. o Minor bugfixes (client):
  11951. - By default, do not enable storage of client-side DNS values. These
  11952. values were unused by default previously, but they should not have
  11953. been cached at all. Fixes bug 24050; bugfix on 0.2.6.3-alpha.
  11954. Changes in version 0.3.1.9 - 2017-12-01:
  11955. Tor 0.3.1.9 backports important security and stability fixes from the
  11956. 0.3.2 development series. All Tor users should upgrade to this
  11957. release, or to another of the releases coming out today.
  11958. o Major bugfixes (security, backport from 0.3.2.6-alpha):
  11959. - Fix a denial of service bug where an attacker could use a
  11960. malformed directory object to cause a Tor instance to pause while
  11961. OpenSSL would try to read a passphrase from the terminal. (Tor
  11962. instances run without a terminal, which is the case for most Tor
  11963. packages, are not impacted.) Fixes bug 24246; bugfix on every
  11964. version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
  11965. Found by OSS-Fuzz as testcase 6360145429790720.
  11966. - Fix a denial of service issue where an attacker could crash a
  11967. directory authority using a malformed router descriptor. Fixes bug
  11968. 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
  11969. and CVE-2017-8820.
  11970. - When checking for replays in the INTRODUCE1 cell data for a
  11971. (legacy) onion service, correctly detect replays in the RSA-
  11972. encrypted part of the cell. We were previously checking for
  11973. replays on the entire cell, but those can be circumvented due to
  11974. the malleability of Tor's legacy hybrid encryption. This fix helps
  11975. prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
  11976. 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
  11977. and CVE-2017-8819.
  11978. o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
  11979. - Fix a use-after-free error that could crash v2 Tor onion services
  11980. when they failed to open circuits while expiring introduction
  11981. points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
  11982. also tracked as TROVE-2017-013 and CVE-2017-8823.
  11983. o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
  11984. - When running as a relay, make sure that we never build a path
  11985. through ourselves, even in the case where we have somehow lost the
  11986. version of our descriptor appearing in the consensus. Fixes part
  11987. of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
  11988. as TROVE-2017-012 and CVE-2017-8822.
  11989. - When running as a relay, make sure that we never choose ourselves
  11990. as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This
  11991. issue is also tracked as TROVE-2017-012 and CVE-2017-8822.
  11992. o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha):
  11993. - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
  11994. making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
  11995. 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
  11996. identifying and finding a workaround to this bug and to Moritz,
  11997. Arthur Edelstein, and Roger for helping to track it down and
  11998. analyze it.
  11999. o Minor features (bridge):
  12000. - Bridges now include notice in their descriptors that they are
  12001. bridges, and notice of their distribution status, based on their
  12002. publication settings. Implements ticket 18329. For more fine-
  12003. grained control of how a bridge is distributed, upgrade to 0.3.2.x
  12004. or later.
  12005. o Minor features (directory authority, backport from 0.3.2.6-alpha):
  12006. - Add an IPv6 address for the "bastet" directory authority. Closes
  12007. ticket 24394.
  12008. o Minor features (geoip):
  12009. - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
  12010. Country database.
  12011. o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha):
  12012. - Avoid unnecessary calls to directory_fetches_from_authorities() on
  12013. relays, to prevent spurious address resolutions and descriptor
  12014. rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
  12015. bugfix on in 0.2.8.1-alpha.
  12016. o Minor bugfixes (compilation, backport from 0.3.2.1-alpha):
  12017. - Fix unused variable warnings in donna's Curve25519 SSE2 code.
  12018. Fixes bug 22895; bugfix on 0.2.7.2-alpha.
  12019. o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha):
  12020. - When a circuit is marked for close, do not attempt to package any
  12021. cells for channels on that circuit. Previously, we would detect
  12022. this condition lower in the call stack, when we noticed that the
  12023. circuit had no attached channel, and log an annoying message.
  12024. Fixes bug 8185; bugfix on 0.2.5.4-alpha.
  12025. o Minor bugfixes (onion service, backport from 0.3.2.5-alpha):
  12026. - Rename the consensus parameter "hsdir-interval" to "hsdir_interval"
  12027. so it matches dir-spec.txt. Fixes bug 24262; bugfix
  12028. on 0.3.1.1-alpha.
  12029. o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha):
  12030. - Avoid a crash when transitioning from client mode to bridge mode.
  12031. Previously, we would launch the worker threads whenever our
  12032. "public server" mode changed, but not when our "server" mode
  12033. changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
  12034. Changes in version 0.3.0.13 - 2017-12-01
  12035. Tor 0.3.0.13 backports important security and stability bugfixes from
  12036. later Tor releases. All Tor users should upgrade to this release, or
  12037. to another of the releases coming out today.
  12038. Note: the Tor 0.3.0 series will no longer be supported after 26 Jan
  12039. 2018. If you need a release with long-term support, please stick with
  12040. the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
  12041. o Major bugfixes (security, backport from 0.3.2.6-alpha):
  12042. - Fix a denial of service bug where an attacker could use a
  12043. malformed directory object to cause a Tor instance to pause while
  12044. OpenSSL would try to read a passphrase from the terminal. (Tor
  12045. instances run without a terminal, which is the case for most Tor
  12046. packages, are not impacted.) Fixes bug 24246; bugfix on every
  12047. version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
  12048. Found by OSS-Fuzz as testcase 6360145429790720.
  12049. - Fix a denial of service issue where an attacker could crash a
  12050. directory authority using a malformed router descriptor. Fixes bug
  12051. 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
  12052. and CVE-2017-8820.
  12053. - When checking for replays in the INTRODUCE1 cell data for a
  12054. (legacy) onion service, correctly detect replays in the RSA-
  12055. encrypted part of the cell. We were previously checking for
  12056. replays on the entire cell, but those can be circumvented due to
  12057. the malleability of Tor's legacy hybrid encryption. This fix helps
  12058. prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
  12059. 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
  12060. and CVE-2017-8819.
  12061. o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
  12062. - Fix a use-after-free error that could crash v2 Tor onion services
  12063. when they failed to open circuits while expiring introduction
  12064. points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
  12065. also tracked as TROVE-2017-013 and CVE-2017-8823.
  12066. o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
  12067. - When running as a relay, make sure that we never build a path
  12068. through ourselves, even in the case where we have somehow lost the
  12069. version of our descriptor appearing in the consensus. Fixes part
  12070. of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
  12071. as TROVE-2017-012 and CVE-2017-8822.
  12072. - When running as a relay, make sure that we never choose ourselves
  12073. as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This
  12074. issue is also tracked as TROVE-2017-012 and CVE-2017-8822.
  12075. o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha):
  12076. - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
  12077. making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
  12078. 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
  12079. identifying and finding a workaround to this bug and to Moritz,
  12080. Arthur Edelstein, and Roger for helping to track it down and
  12081. analyze it.
  12082. o Minor features (security, windows, backport from 0.3.1.1-alpha):
  12083. - Enable a couple of pieces of Windows hardening: one
  12084. (HeapEnableTerminationOnCorruption) that has been on-by-default
  12085. since Windows 8, and unavailable before Windows 7; and one
  12086. (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't
  12087. affect us, but shouldn't do any harm. Closes ticket 21953.
  12088. o Minor features (bridge, backport from 0.3.1.9):
  12089. - Bridges now include notice in their descriptors that they are
  12090. bridges, and notice of their distribution status, based on their
  12091. publication settings. Implements ticket 18329. For more fine-
  12092. grained control of how a bridge is distributed, upgrade to 0.3.2.x
  12093. or later.
  12094. o Minor features (directory authority, backport from 0.3.2.6-alpha):
  12095. - Add an IPv6 address for the "bastet" directory authority. Closes
  12096. ticket 24394.
  12097. o Minor features (geoip):
  12098. - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
  12099. Country database.
  12100. o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha):
  12101. - Avoid unnecessary calls to directory_fetches_from_authorities() on
  12102. relays, to prevent spurious address resolutions and descriptor
  12103. rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
  12104. bugfix on in 0.2.8.1-alpha.
  12105. o Minor bugfixes (compilation, backport from 0.3.2.1-alpha):
  12106. - Fix unused variable warnings in donna's Curve25519 SSE2 code.
  12107. Fixes bug 22895; bugfix on 0.2.7.2-alpha.
  12108. o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha):
  12109. - When a circuit is marked for close, do not attempt to package any
  12110. cells for channels on that circuit. Previously, we would detect
  12111. this condition lower in the call stack, when we noticed that the
  12112. circuit had no attached channel, and log an annoying message.
  12113. Fixes bug 8185; bugfix on 0.2.5.4-alpha.
  12114. o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha):
  12115. - Avoid a crash when transitioning from client mode to bridge mode.
  12116. Previously, we would launch the worker threads whenever our
  12117. "public server" mode changed, but not when our "server" mode
  12118. changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
  12119. o Minor bugfixes (testing, backport from 0.3.1.6-rc):
  12120. - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
  12121. bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
  12122. Changes in version 0.2.9.14 - 2017-12-01
  12123. Tor 0.3.0.13 backports important security and stability bugfixes from
  12124. later Tor releases. All Tor users should upgrade to this release, or
  12125. to another of the releases coming out today.
  12126. o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha):
  12127. - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
  12128. making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
  12129. 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
  12130. identifying and finding a workaround to this bug and to Moritz,
  12131. Arthur Edelstein, and Roger for helping to track it down and
  12132. analyze it.
  12133. o Major bugfixes (security, backport from 0.3.2.6-alpha):
  12134. - Fix a denial of service bug where an attacker could use a
  12135. malformed directory object to cause a Tor instance to pause while
  12136. OpenSSL would try to read a passphrase from the terminal. (Tor
  12137. instances run without a terminal, which is the case for most Tor
  12138. packages, are not impacted.) Fixes bug 24246; bugfix on every
  12139. version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
  12140. Found by OSS-Fuzz as testcase 6360145429790720.
  12141. - Fix a denial of service issue where an attacker could crash a
  12142. directory authority using a malformed router descriptor. Fixes bug
  12143. 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
  12144. and CVE-2017-8820.
  12145. - When checking for replays in the INTRODUCE1 cell data for a
  12146. (legacy) onion service, correctly detect replays in the RSA-
  12147. encrypted part of the cell. We were previously checking for
  12148. replays on the entire cell, but those can be circumvented due to
  12149. the malleability of Tor's legacy hybrid encryption. This fix helps
  12150. prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
  12151. 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
  12152. and CVE-2017-8819.
  12153. o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
  12154. - Fix a use-after-free error that could crash v2 Tor onion services
  12155. when they failed to open circuits while expiring introduction
  12156. points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
  12157. also tracked as TROVE-2017-013 and CVE-2017-8823.
  12158. o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
  12159. - When running as a relay, make sure that we never build a path
  12160. through ourselves, even in the case where we have somehow lost the
  12161. version of our descriptor appearing in the consensus. Fixes part
  12162. of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
  12163. as TROVE-2017-012 and CVE-2017-8822.
  12164. o Minor features (bridge, backport from 0.3.1.9):
  12165. - Bridges now include notice in their descriptors that they are
  12166. bridges, and notice of their distribution status, based on their
  12167. publication settings. Implements ticket 18329. For more fine-
  12168. grained control of how a bridge is distributed, upgrade to 0.3.2.x
  12169. or later.
  12170. o Minor features (directory authority, backport from 0.3.2.6-alpha):
  12171. - Add an IPv6 address for the "bastet" directory authority. Closes
  12172. ticket 24394.
  12173. o Minor features (geoip):
  12174. - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
  12175. Country database.
  12176. o Minor features (security, windows, backport from 0.3.1.1-alpha):
  12177. - Enable a couple of pieces of Windows hardening: one
  12178. (HeapEnableTerminationOnCorruption) that has been on-by-default
  12179. since Windows 8, and unavailable before Windows 7; and one
  12180. (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't
  12181. affect us, but shouldn't do any harm. Closes ticket 21953.
  12182. o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha):
  12183. - Avoid unnecessary calls to directory_fetches_from_authorities() on
  12184. relays, to prevent spurious address resolutions and descriptor
  12185. rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
  12186. bugfix on in 0.2.8.1-alpha.
  12187. o Minor bugfixes (compilation, backport from 0.3.2.1-alpha):
  12188. - Fix unused variable warnings in donna's Curve25519 SSE2 code.
  12189. Fixes bug 22895; bugfix on 0.2.7.2-alpha.
  12190. o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha):
  12191. - When a circuit is marked for close, do not attempt to package any
  12192. cells for channels on that circuit. Previously, we would detect
  12193. this condition lower in the call stack, when we noticed that the
  12194. circuit had no attached channel, and log an annoying message.
  12195. Fixes bug 8185; bugfix on 0.2.5.4-alpha.
  12196. o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha):
  12197. - Avoid a crash when transitioning from client mode to bridge mode.
  12198. Previously, we would launch the worker threads whenever our
  12199. "public server" mode changed, but not when our "server" mode
  12200. changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
  12201. o Minor bugfixes (testing, backport from 0.3.1.6-rc):
  12202. - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
  12203. bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
  12204. Changes in version 0.2.8.17 - 2017-12-01
  12205. Tor 0.2.8.17 backports important security and stability bugfixes from
  12206. later Tor releases. All Tor users should upgrade to this release, or
  12207. to another of the releases coming out today.
  12208. Note: the Tor 0.2.8 series will no longer be supported after 1 Jan
  12209. 2018. If you need a release with long-term support, please upgrade with
  12210. the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
  12211. o Major bugfixes (security, backport from 0.3.2.6-alpha):
  12212. - Fix a denial of service bug where an attacker could use a
  12213. malformed directory object to cause a Tor instance to pause while
  12214. OpenSSL would try to read a passphrase from the terminal. (Tor
  12215. instances run without a terminal, which is the case for most Tor
  12216. packages, are not impacted.) Fixes bug 24246; bugfix on every
  12217. version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
  12218. Found by OSS-Fuzz as testcase 6360145429790720.
  12219. - When checking for replays in the INTRODUCE1 cell data for a
  12220. (legacy) onion service, correctly detect replays in the RSA-
  12221. encrypted part of the cell. We were previously checking for
  12222. replays on the entire cell, but those can be circumvented due to
  12223. the malleability of Tor's legacy hybrid encryption. This fix helps
  12224. prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
  12225. 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
  12226. and CVE-2017-8819.
  12227. o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
  12228. - Fix a use-after-free error that could crash v2 Tor onion services
  12229. when they failed to open circuits while expiring introduction
  12230. points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
  12231. also tracked as TROVE-2017-013 and CVE-2017-8823.
  12232. o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
  12233. - When running as a relay, make sure that we never build a path through
  12234. ourselves, even in the case where we have somehow lost the version of
  12235. our descriptor appearing in the consensus. Fixes part of bug 21534;
  12236. bugfix on 0.2.0.1-alpha. This issue is also tracked as TROVE-2017-012
  12237. and CVE-2017-8822.
  12238. o Minor features (bridge, backport from 0.3.1.9):
  12239. - Bridges now include notice in their descriptors that they are
  12240. bridges, and notice of their distribution status, based on their
  12241. publication settings. Implements ticket 18329. For more fine-
  12242. grained control of how a bridge is distributed, upgrade to 0.3.2.x
  12243. or later.
  12244. o Minor features (directory authority, backport from 0.3.2.6-alpha):
  12245. - Add an IPv6 address for the "bastet" directory authority. Closes
  12246. ticket 24394.
  12247. o Minor features (geoip):
  12248. - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
  12249. Country database.
  12250. o Minor bugfixes (testing, backport from 0.3.1.6-rc):
  12251. - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
  12252. bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
  12253. Changes in version 0.2.5.16 - 2017-12-01
  12254. Tor 0.2.5.13 backports important security and stability bugfixes from
  12255. later Tor releases. All Tor users should upgrade to this release, or
  12256. to another of the releases coming out today.
  12257. Note: the Tor 0.2.5 series will no longer be supported after 1 May
  12258. 2018. If you need a release with long-term support, please upgrade to
  12259. the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
  12260. o Major bugfixes (security, backport from 0.3.2.6-alpha):
  12261. - Fix a denial of service bug where an attacker could use a
  12262. malformed directory object to cause a Tor instance to pause while
  12263. OpenSSL would try to read a passphrase from the terminal. (Tor
  12264. instances run without a terminal, which is the case for most Tor
  12265. packages, are not impacted.) Fixes bug 24246; bugfix on every
  12266. version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
  12267. Found by OSS-Fuzz as testcase 6360145429790720.
  12268. - When checking for replays in the INTRODUCE1 cell data for a
  12269. (legacy) onion service, correctly detect replays in the RSA-
  12270. encrypted part of the cell. We were previously checking for
  12271. replays on the entire cell, but those can be circumvented due to
  12272. the malleability of Tor's legacy hybrid encryption. This fix helps
  12273. prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
  12274. 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
  12275. and CVE-2017-8819.
  12276. o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
  12277. - When running as a relay, make sure that we never build a path
  12278. through ourselves, even in the case where we have somehow lost the
  12279. version of our descriptor appearing in the consensus. Fixes part
  12280. of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
  12281. as TROVE-2017-012 and CVE-2017-8822.
  12282. o Minor features (bridge, backport from 0.3.1.9):
  12283. - Bridges now include notice in their descriptors that they are
  12284. bridges, and notice of their distribution status, based on their
  12285. publication settings. Implements ticket 18329. For more fine-
  12286. grained control of how a bridge is distributed, upgrade to 0.3.2.x
  12287. or later.
  12288. o Minor features (geoip):
  12289. - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
  12290. Country database.
  12291. Changes in version 0.3.2.5-alpha - 2017-11-22
  12292. Tor 0.3.2.5-alpha is the fifth alpha release in the 0.3.2.x series. It
  12293. fixes several stability and reliability bugs, including a fix for
  12294. intermittent bootstrapping failures that some people have been seeing
  12295. since the 0.3.0.x series.
  12296. Please test this alpha out -- many of these fixes will soon be
  12297. backported to stable Tor versions if no additional bugs are found
  12298. in them.
  12299. o Major bugfixes (bootstrapping):
  12300. - Fetch descriptors aggressively whenever we lack enough to build
  12301. circuits, regardless of how many descriptors we are missing.
  12302. Previously, we would delay launching the fetch when we had fewer
  12303. than 15 missing descriptors, even if some of those descriptors
  12304. were blocking circuits from building. Fixes bug 23985; bugfix on
  12305. 0.1.1.11-alpha. The effects of this bug became worse in
  12306. 0.3.0.3-alpha, when we began treating missing descriptors from our
  12307. primary guards as a reason to delay circuits.
  12308. - Don't try fetching microdescriptors from relays that have failed
  12309. to deliver them in the past. Fixes bug 23817; bugfix
  12310. on 0.3.0.1-alpha.
  12311. o Minor features (directory authority):
  12312. - Make the "Exit" flag assignment only depend on whether the exit
  12313. policy allows connections to ports 80 and 443. Previously relays
  12314. would get the Exit flag if they allowed connections to one of
  12315. these ports and also port 6667. Resolves ticket 23637.
  12316. o Minor features (geoip):
  12317. - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
  12318. Country database.
  12319. o Minor features (linux seccomp2 sandbox):
  12320. - Update the sandbox rules so that they should now work correctly
  12321. with Glibc 2.26. Closes ticket 24315.
  12322. o Minor features (logging):
  12323. - Downgrade a pair of log messages that could occur when an exit's
  12324. resolver gave us an unusual (but not forbidden) response. Closes
  12325. ticket 24097.
  12326. - Improve the message we log when re-enabling circuit build timeouts
  12327. after having received a consensus. Closes ticket 20963.
  12328. o Minor bugfixes (compilation):
  12329. - Fix a memory leak warning in one of the libevent-related
  12330. configuration tests that could occur when manually specifying
  12331. -fsanitize=address. Fixes bug 24279; bugfix on 0.3.0.2-alpha.
  12332. Found and patched by Alex Xu.
  12333. - When detecting OpenSSL on Windows from our configure script, make
  12334. sure to try linking with the ws2_32 library. Fixes bug 23783;
  12335. bugfix on 0.3.2.2-alpha.
  12336. o Minor bugfixes (control port, linux seccomp2 sandbox):
  12337. - Avoid a crash when attempting to use the seccomp2 sandbox together
  12338. with the OwningControllerProcess feature. Fixes bug 24198; bugfix
  12339. on 0.2.5.1-alpha.
  12340. o Minor bugfixes (control port, onion services):
  12341. - Report "FAILED" instead of "UPLOAD_FAILED" "FAILED" for the
  12342. HS_DESC event when a service is not able to upload a descriptor.
  12343. Fixes bug 24230; bugfix on 0.2.7.1-alpha.
  12344. o Minor bugfixes (directory cache):
  12345. - Recover better from empty or corrupt files in the consensus cache
  12346. directory. Fixes bug 24099; bugfix on 0.3.1.1-alpha.
  12347. - When a consensus diff calculation is only partially successful,
  12348. only record the successful parts as having succeeded. Partial
  12349. success can happen if (for example) one compression method fails
  12350. but the others succeed. Previously we misrecorded all the
  12351. calculations as having succeeded, which would later cause a
  12352. nonfatal assertion failure. Fixes bug 24086; bugfix
  12353. on 0.3.1.1-alpha.
  12354. o Minor bugfixes (logging):
  12355. - Only log once if we notice that KIST support is gone. Fixes bug
  12356. 24158; bugfix on 0.3.2.1-alpha.
  12357. - Suppress a log notice when relay descriptors arrive. We already
  12358. have a bootstrap progress for this so no need to log notice
  12359. everytime tor receives relay descriptors. Microdescriptors behave
  12360. the same. Fixes bug 23861; bugfix on 0.2.8.2-alpha.
  12361. o Minor bugfixes (network layer):
  12362. - When closing a connection via close_connection_immediately(), we
  12363. mark it as "not blocked on bandwidth", to prevent later calls from
  12364. trying to unblock it, and give it permission to read. This fixes a
  12365. backtrace warning that can happen on relays under various
  12366. circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc.
  12367. o Minor bugfixes (onion services):
  12368. - The introduction circuit was being timed out too quickly while
  12369. waiting for the rendezvous circuit to complete. Keep the intro
  12370. circuit around longer instead of timing out and reopening new ones
  12371. constantly. Fixes bug 23681; bugfix on 0.2.4.8-alpha.
  12372. - Rename the consensus parameter "hsdir-interval" to "hsdir_interval"
  12373. so it matches dir-spec.txt. Fixes bug 24262; bugfix
  12374. on 0.3.1.1-alpha.
  12375. - Silence a warning about failed v3 onion descriptor uploads that
  12376. can happen naturally under certain edge cases. Fixes part of bug
  12377. 23662; bugfix on 0.3.2.1-alpha.
  12378. o Minor bugfixes (tests):
  12379. - Fix a memory leak in one of the bridge-distribution test cases.
  12380. Fixes bug 24345; bugfix on 0.3.2.3-alpha.
  12381. - Fix a bug in our fuzzing mock replacement for crypto_pk_checksig(),
  12382. to correctly handle cases where a caller gives it an RSA key of
  12383. under 160 bits. (This is not actually a bug in Tor itself, but
  12384. rather in our fuzzing code.) Fixes bug 24247; bugfix on
  12385. 0.3.0.3-alpha. Found by OSS-Fuzz as issue 4177.
  12386. o Documentation:
  12387. - Add notes in man page regarding OS support for the various
  12388. scheduler types. Attempt to use less jargon in the scheduler
  12389. section. Closes ticket 24254.
  12390. Changes in version 0.3.2.4-alpha - 2017-11-08
  12391. Tor 0.3.2.4-alpha is the fourth alpha release in the 0.3.2.x series.
  12392. It fixes several stability and reliability bugs, especially including
  12393. a major reliability issue that has been plaguing fast exit relays in
  12394. recent months.
  12395. o Major bugfixes (exit relays, DNS):
  12396. - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
  12397. making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
  12398. 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
  12399. identifying and finding a workaround to this bug and to Moritz,
  12400. Arthur Edelstein, and Roger for helping to track it down and
  12401. analyze it.
  12402. o Major bugfixes (scheduler, channel):
  12403. - Stop processing scheduled channels if they closed while flushing
  12404. cells. This can happen if the write on the connection fails
  12405. leading to the channel being closed while in the scheduler loop.
  12406. Fixes bug 23751; bugfix on 0.3.2.1-alpha.
  12407. o Minor features (logging, scheduler):
  12408. - Introduce a SCHED_BUG() function to log extra information about
  12409. the scheduler state if we ever catch a bug in the scheduler.
  12410. Closes ticket 23753.
  12411. o Minor features (removed deprecations):
  12412. - The ClientDNSRejectInternalAddresses flag can once again be set in
  12413. non-testing Tor networks, so long as they do not use the default
  12414. directory authorities. This change also removes the deprecation of
  12415. this flag from 0.2.9.2-alpha. Closes ticket 21031.
  12416. o Minor features (testing):
  12417. - Our fuzzing tests now test the encrypted portions of v3 onion
  12418. service descriptors. Implements more of 21509.
  12419. o Minor bugfixes (directory client):
  12420. - On failure to download directory information, delay retry attempts
  12421. by a random amount based on the "decorrelated jitter" algorithm.
  12422. Our previous delay algorithm tended to produce extra-long delays
  12423. too easily. Fixes bug 23816; bugfix on 0.2.9.1-alpha.
  12424. o Minor bugfixes (IPv6, v3 single onion services):
  12425. - Remove buggy code for IPv6-only v3 single onion services, and
  12426. reject attempts to configure them. This release supports IPv4,
  12427. dual-stack, and IPv6-only v3 onion services; and IPv4 and dual-
  12428. stack v3 single onion services. Fixes bug 23820; bugfix
  12429. on 0.3.2.1-alpha.
  12430. o Minor bugfixes (logging, relay):
  12431. - Give only a protocol warning when the ed25519 key is not
  12432. consistent between the descriptor and microdescriptor of a relay.
  12433. This can happen, for instance, if the relay has been flagged
  12434. NoEdConsensus. Fixes bug 24025; bugfix on 0.3.2.1-alpha.
  12435. o Minor bugfixes (manpage, onion service):
  12436. - Document that the HiddenServiceNumIntroductionPoints option is
  12437. 0-10 for v2 services and 0-20 for v3 services. Fixes bug 24115;
  12438. bugfix on 0.3.2.1-alpha.
  12439. o Minor bugfixes (memory leaks):
  12440. - Fix a minor memory leak at exit in the KIST scheduler. This bug
  12441. should have no user-visible impact. Fixes bug 23774; bugfix
  12442. on 0.3.2.1-alpha.
  12443. - Fix a memory leak when decrypting a badly formatted v3 onion
  12444. service descriptor. Fixes bug 24150; bugfix on 0.3.2.1-alpha.
  12445. Found by OSS-Fuzz; this is OSS-Fuzz issue 3994.
  12446. o Minor bugfixes (onion services):
  12447. - Cache some needed onion service client information instead of
  12448. constantly computing it over and over again. Fixes bug 23623;
  12449. bugfix on 0.3.2.1-alpha.
  12450. - Properly retry HSv3 descriptor fetches when missing required
  12451. directory information. Fixes bug 23762; bugfix on 0.3.2.1-alpha.
  12452. o Minor bugfixes (path selection):
  12453. - When selecting relays by bandwidth, avoid a rounding error that
  12454. could sometimes cause load to be imbalanced incorrectly.
  12455. Previously, we would always round upwards; now, we round towards
  12456. the nearest integer. This had the biggest effect when a relay's
  12457. weight adjustments should have given it weight 0, but it got
  12458. weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha.
  12459. - When calculating the fraction of nodes that have descriptors, and
  12460. all nodes in the network have zero bandwidths, count the number of
  12461. nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha.
  12462. - Actually log the total bandwidth in compute_weighted_bandwidths().
  12463. Fixes bug 24170; bugfix on 0.2.4.3-alpha.
  12464. o Minor bugfixes (relay, crash):
  12465. - Avoid a crash when transitioning from client mode to bridge mode.
  12466. Previously, we would launch the worker threads whenever our
  12467. "public server" mode changed, but not when our "server" mode
  12468. changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
  12469. o Minor bugfixes (testing):
  12470. - Fix a spurious fuzzing-only use of an uninitialized value. Found
  12471. by Brian Carpenter. Fixes bug 24082; bugfix on 0.3.0.3-alpha.
  12472. - Test that IPv6-only clients can use microdescriptors when running
  12473. "make test-network-all". Requires chutney master 61c28b9 or later.
  12474. Closes ticket 24109.
  12475. Changes in version 0.3.2.3-alpha - 2017-10-27
  12476. Tor 0.3.2.3-alpha is the third release in the 0.3.2 series. It fixes
  12477. numerous small bugs in earlier versions of 0.3.2.x, and adds a new
  12478. directory authority, Bastet.
  12479. o Directory authority changes:
  12480. - Add "Bastet" as a ninth directory authority to the default list.
  12481. Closes ticket 23910.
  12482. - The directory authority "Longclaw" has changed its IP address.
  12483. Closes ticket 23592.
  12484. o Minor features (bridge):
  12485. - Bridge relays can now set the BridgeDistribution config option to
  12486. add a "bridge-distribution-request" line to their bridge
  12487. descriptor, which tells BridgeDB how they'd like their bridge
  12488. address to be given out. (Note that as of Oct 2017, BridgeDB does
  12489. not yet implement this feature.) As a side benefit, this feature
  12490. provides a way to distinguish bridge descriptors from non-bridge
  12491. descriptors. Implements tickets 18329.
  12492. o Minor features (client, entry guards):
  12493. - Improve log messages when missing descriptors for primary guards.
  12494. Resolves ticket 23670.
  12495. o Minor features (geoip):
  12496. - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
  12497. Country database.
  12498. o Minor bugfixes (bridge):
  12499. - Overwrite the bridge address earlier in the process of retrieving
  12500. its descriptor, to make sure we reach it on the configured
  12501. address. Fixes bug 20532; bugfix on 0.2.0.10-alpha.
  12502. o Minor bugfixes (documentation):
  12503. - Document better how to read gcov, and what our gcov postprocessing
  12504. scripts do. Fixes bug 23739; bugfix on 0.2.9.1-alpha.
  12505. o Minor bugfixes (entry guards):
  12506. - Tor now updates its guard state when it reads a consensus
  12507. regardless of whether it's missing descriptors. That makes tor use
  12508. its primary guards to fetch descriptors in some edge cases where
  12509. it would previously have used fallback directories. Fixes bug
  12510. 23862; bugfix on 0.3.0.1-alpha.
  12511. o Minor bugfixes (hidden service client):
  12512. - When handling multiple SOCKS request for the same .onion address,
  12513. only fetch the service descriptor once.
  12514. - When a descriptor fetch fails with a non-recoverable error, close
  12515. all pending SOCKS requests for that .onion. Fixes bug 23653;
  12516. bugfix on 0.3.2.1-alpha.
  12517. o Minor bugfixes (hidden service):
  12518. - Always regenerate missing hidden service public key files. Prior
  12519. to this, if the public key was deleted from disk, it wouldn't get
  12520. recreated. Fixes bug 23748; bugfix on 0.3.2.2-alpha. Patch
  12521. from "cathugger".
  12522. - Make sure that we have a usable ed25519 key when the intro point
  12523. relay supports ed25519 link authentication. Fixes bug 24002;
  12524. bugfix on 0.3.2.1-alpha.
  12525. o Minor bugfixes (hidden service, v2):
  12526. - When reloading configured hidden services, copy all information
  12527. from the old service object. Previously, some data was omitted,
  12528. causing delays in descriptor upload, and other bugs. Fixes bug
  12529. 23790; bugfix on 0.2.1.9-alpha.
  12530. o Minor bugfixes (memory safety, defensive programming):
  12531. - Clear the target address when node_get_prim_orport() returns
  12532. early. Fixes bug 23874; bugfix on 0.2.8.2-alpha.
  12533. o Minor bugfixes (relay):
  12534. - Avoid a BUG warning when receiving a dubious CREATE cell while an
  12535. option transition is in progress. Fixes bug 23952; bugfix
  12536. on 0.3.2.1-alpha.
  12537. o Minor bugfixes (testing):
  12538. - Adjust the GitLab CI configuration to more closely match that of
  12539. Travis CI. Fixes bug 23757; bugfix on 0.3.2.2-alpha.
  12540. - Prevent scripts/test/coverage from attempting to move gcov output
  12541. to the root directory. Fixes bug 23741; bugfix on 0.2.5.1-alpha.
  12542. - When running unit tests as root, skip a test that would fail
  12543. because it expects a permissions error. This affects some
  12544. continuous integration setups. Fixes bug 23758; bugfix
  12545. on 0.3.2.2-alpha.
  12546. - Stop unconditionally mirroring the tor repository in GitLab CI.
  12547. This prevented developers from enabling GitLab CI on master. Fixes
  12548. bug 23755; bugfix on 0.3.2.2-alpha.
  12549. - Fix the hidden service v3 descriptor decoding fuzzing to use the
  12550. latest decoding API correctly. Fixes bug 21509; bugfix
  12551. on 0.3.2.1-alpha.
  12552. o Minor bugfixes (warnings):
  12553. - When we get an HTTP request on a SOCKS port, tell the user about
  12554. the new HTTPTunnelPort option. Previously, we would give a "Tor is
  12555. not an HTTP Proxy" message, which stopped being true when
  12556. HTTPTunnelPort was introduced. Fixes bug 23678; bugfix
  12557. on 0.3.2.1-alpha.
  12558. Changes in version 0.2.5.15 - 2017-10-25
  12559. Tor 0.2.5.15 backports a collection of bugfixes from later Tor release
  12560. series. It also adds a new directory authority, Bastet.
  12561. Note: the Tor 0.2.5 series will no longer be supported after 1 May
  12562. 2018. If you need a release with long-term support, please upgrade to
  12563. the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
  12564. o Directory authority changes:
  12565. - Add "Bastet" as a ninth directory authority to the default list.
  12566. Closes ticket 23910.
  12567. - The directory authority "Longclaw" has changed its IP address.
  12568. Closes ticket 23592.
  12569. o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
  12570. - Avoid an assertion failure bug affecting our implementation of
  12571. inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
  12572. handling of "0xx" differs from what we had expected. Fixes bug
  12573. 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
  12574. o Minor features (geoip):
  12575. - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
  12576. Country database.
  12577. o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha):
  12578. - Fix a memset() off the end of an array when packing cells. This
  12579. bug should be harmless in practice, since the corrupted bytes are
  12580. still in the same structure, and are always padding bytes,
  12581. ignored, or immediately overwritten, depending on compiler
  12582. behavior. Nevertheless, because the memset()'s purpose is to make
  12583. sure that any other cell-handling bugs can't expose bytes to the
  12584. network, we need to fix it. Fixes bug 22737; bugfix on
  12585. 0.2.4.11-alpha. Fixes CID 1401591.
  12586. o Build features (backport from 0.3.1.5-alpha):
  12587. - Tor's repository now includes a Travis Continuous Integration (CI)
  12588. configuration file (.travis.yml). This is meant to help new
  12589. developers and contributors who fork Tor to a Github repository be
  12590. better able to test their changes, and understand what we expect
  12591. to pass. To use this new build feature, you must fork Tor to your
  12592. Github account, then go into the "Integrations" menu in the
  12593. repository settings for your fork and enable Travis, then push
  12594. your changes. Closes ticket 22636.
  12595. Changes in version 0.2.8.16 - 2017-10-25
  12596. Tor 0.2.8.16 backports a collection of bugfixes from later Tor release
  12597. series, including a bugfix for a crash issue that had affected relays
  12598. under memory pressure. It also adds a new directory authority, Bastet.
  12599. Note: the Tor 0.2.8 series will no longer be supported after 1 Jan
  12600. 2018. If you need a release with long-term support, please stick with
  12601. the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
  12602. o Directory authority changes:
  12603. - Add "Bastet" as a ninth directory authority to the default list.
  12604. Closes ticket 23910.
  12605. - The directory authority "Longclaw" has changed its IP address.
  12606. Closes ticket 23592.
  12607. o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
  12608. - Fix a timing-based assertion failure that could occur when the
  12609. circuit out-of-memory handler freed a connection's output buffer.
  12610. Fixes bug 23690; bugfix on 0.2.6.1-alpha.
  12611. o Minor features (directory authorities, backport from 0.3.2.2-alpha):
  12612. - Remove longclaw's IPv6 address, as it will soon change. Authority
  12613. IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
  12614. 3/8 directory authorities with IPv6 addresses, but there are also
  12615. 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
  12616. o Minor features (geoip):
  12617. - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
  12618. Country database.
  12619. Changes in version 0.2.9.13 - 2017-10-25
  12620. Tor 0.2.9.13 backports a collection of bugfixes from later Tor release
  12621. series, including a bugfix for a crash issue that had affected relays
  12622. under memory pressure. It also adds a new directory authority, Bastet.
  12623. o Directory authority changes:
  12624. - Add "Bastet" as a ninth directory authority to the default list.
  12625. Closes ticket 23910.
  12626. - The directory authority "Longclaw" has changed its IP address.
  12627. Closes ticket 23592.
  12628. o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
  12629. - Fix a timing-based assertion failure that could occur when the
  12630. circuit out-of-memory handler freed a connection's output buffer.
  12631. Fixes bug 23690; bugfix on 0.2.6.1-alpha.
  12632. o Minor features (directory authorities, backport from 0.3.2.2-alpha):
  12633. - Remove longclaw's IPv6 address, as it will soon change. Authority
  12634. IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
  12635. 3/8 directory authorities with IPv6 addresses, but there are also
  12636. 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
  12637. o Minor features (geoip):
  12638. - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
  12639. Country database.
  12640. o Minor bugfixes (directory authority, backport from 0.3.1.5-alpha):
  12641. - When a directory authority rejects a descriptor or extrainfo with
  12642. a given digest, mark that digest as undownloadable, so that we do
  12643. not attempt to download it again over and over. We previously
  12644. tried to avoid downloading such descriptors by other means, but we
  12645. didn't notice if we accidentally downloaded one anyway. This
  12646. behavior became problematic in 0.2.7.2-alpha, when authorities
  12647. began pinning Ed25519 keys. Fixes bug 22349; bugfix
  12648. on 0.2.1.19-alpha.
  12649. o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha):
  12650. - Clear the address when node_get_prim_orport() returns early.
  12651. Fixes bug 23874; bugfix on 0.2.8.2-alpha.
  12652. o Minor bugfixes (Windows service, backport from 0.3.1.6-rc):
  12653. - When running as a Windows service, set the ID of the main thread
  12654. correctly. Failure to do so made us fail to send log messages to
  12655. the controller in 0.2.1.16-rc, slowed down controller event
  12656. delivery in 0.2.7.3-rc and later, and crash with an assertion
  12657. failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha.
  12658. Patch and diagnosis from "Vort".
  12659. Changes in version 0.3.0.12 - 2017-10-25
  12660. Tor 0.3.0.12 backports a collection of bugfixes from later Tor release
  12661. series, including a bugfix for a crash issue that had affected relays
  12662. under memory pressure. It also adds a new directory authority, Bastet.
  12663. Note: the Tor 0.3.0 series will no longer be supported after 26 Jan
  12664. 2018. If you need a release with long-term support, please stick with
  12665. the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
  12666. o Directory authority changes:
  12667. - Add "Bastet" as a ninth directory authority to the default list.
  12668. Closes ticket 23910.
  12669. - The directory authority "Longclaw" has changed its IP address.
  12670. Closes ticket 23592.
  12671. o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
  12672. - Fix a timing-based assertion failure that could occur when the
  12673. circuit out-of-memory handler freed a connection's output buffer.
  12674. Fixes bug 23690; bugfix on 0.2.6.1-alpha.
  12675. o Minor features (directory authorities, backport from 0.3.2.2-alpha):
  12676. - Remove longclaw's IPv6 address, as it will soon change. Authority
  12677. IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
  12678. 3/8 directory authorities with IPv6 addresses, but there are also
  12679. 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
  12680. o Minor features (geoip):
  12681. - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
  12682. Country database.
  12683. o Minor bugfixes (directory authority, backport from 0.3.1.5-alpha):
  12684. - When a directory authority rejects a descriptor or extrainfo with
  12685. a given digest, mark that digest as undownloadable, so that we do
  12686. not attempt to download it again over and over. We previously
  12687. tried to avoid downloading such descriptors by other means, but we
  12688. didn't notice if we accidentally downloaded one anyway. This
  12689. behavior became problematic in 0.2.7.2-alpha, when authorities
  12690. began pinning Ed25519 keys. Fixes bug 22349; bugfix
  12691. on 0.2.1.19-alpha.
  12692. o Minor bugfixes (hidden service, relay, backport from 0.3.2.2-alpha):
  12693. - Avoid a possible double close of a circuit by the intro point on
  12694. error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610;
  12695. bugfix on 0.3.0.1-alpha.
  12696. o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha):
  12697. - Clear the address when node_get_prim_orport() returns early.
  12698. Fixes bug 23874; bugfix on 0.2.8.2-alpha.
  12699. o Minor bugfixes (Windows service, backport from 0.3.1.6-rc):
  12700. - When running as a Windows service, set the ID of the main thread
  12701. correctly. Failure to do so made us fail to send log messages to
  12702. the controller in 0.2.1.16-rc, slowed down controller event
  12703. delivery in 0.2.7.3-rc and later, and crash with an assertion
  12704. failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha.
  12705. Patch and diagnosis from "Vort".
  12706. Changes in version 0.3.1.8 - 2017-10-25
  12707. Tor 0.3.1.8 is the second stable release in the 0.3.1 series.
  12708. It includes several bugfixes, including a bugfix for a crash issue
  12709. that had affected relays under memory pressure. It also adds
  12710. a new directory authority, Bastet.
  12711. o Directory authority changes:
  12712. - Add "Bastet" as a ninth directory authority to the default list.
  12713. Closes ticket 23910.
  12714. - The directory authority "Longclaw" has changed its IP address.
  12715. Closes ticket 23592.
  12716. o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
  12717. - Fix a timing-based assertion failure that could occur when the
  12718. circuit out-of-memory handler freed a connection's output buffer.
  12719. Fixes bug 23690; bugfix on 0.2.6.1-alpha.
  12720. o Minor features (directory authorities, backport from 0.3.2.2-alpha):
  12721. - Remove longclaw's IPv6 address, as it will soon change. Authority
  12722. IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
  12723. 3/8 directory authorities with IPv6 addresses, but there are also
  12724. 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
  12725. o Minor features (geoip):
  12726. - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
  12727. Country database.
  12728. o Minor bugfixes (compilation, backport from 0.3.2.2-alpha):
  12729. - Fix a compilation warning when building with zstd support on
  12730. 32-bit platforms. Fixes bug 23568; bugfix on 0.3.1.1-alpha. Found
  12731. and fixed by Andreas Stieger.
  12732. o Minor bugfixes (compression, backport from 0.3.2.2-alpha):
  12733. - Handle a pathological case when decompressing Zstandard data when
  12734. the output buffer size is zero. Fixes bug 23551; bugfix
  12735. on 0.3.1.1-alpha.
  12736. o Minor bugfixes (directory authority, backport from 0.3.2.1-alpha):
  12737. - Remove the length limit on HTTP status lines that authorities can
  12738. send in their replies. Fixes bug 23499; bugfix on 0.3.1.6-rc.
  12739. o Minor bugfixes (hidden service, relay, backport from 0.3.2.2-alpha):
  12740. - Avoid a possible double close of a circuit by the intro point on
  12741. error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610;
  12742. bugfix on 0.3.0.1-alpha.
  12743. o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha):
  12744. - Clear the address when node_get_prim_orport() returns early.
  12745. Fixes bug 23874; bugfix on 0.2.8.2-alpha.
  12746. o Minor bugfixes (unit tests, backport from 0.3.2.2-alpha):
  12747. - Fix additional channelpadding unit test failures by using mocked
  12748. time instead of actual time for all tests. Fixes bug 23608; bugfix
  12749. on 0.3.1.1-alpha.
  12750. Changes in version 0.3.2.2-alpha - 2017-09-29
  12751. Tor 0.3.2.2-alpha is the second release in the 0.3.2 series. This
  12752. release fixes several minor bugs in the new scheduler and next-
  12753. generation onion services; both features were newly added in the 0.3.2
  12754. series. Other fixes in this alpha include several fixes for non-fatal
  12755. tracebacks which would appear in logs.
  12756. With the aim to stabilise the 0.3.2 series by 15 December 2017, this
  12757. alpha does not contain any substantial new features. Minor features
  12758. include better testing and logging.
  12759. The following comprises the complete list of changes included
  12760. in 0.3.2.2-alpha:
  12761. o Major bugfixes (relay, crash, assertion failure):
  12762. - Fix a timing-based assertion failure that could occur when the
  12763. circuit out-of-memory handler freed a connection's output buffer.
  12764. Fixes bug 23690; bugfix on 0.2.6.1-alpha.
  12765. o Major bugfixes (scheduler):
  12766. - If a channel is put into the scheduler's pending list, then it
  12767. starts closing, and then if the scheduler runs before it finishes
  12768. closing, the scheduler will get stuck trying to flush its cells
  12769. while the lower layers refuse to cooperate. Fix that race
  12770. condition by giving the scheduler an escape method. Fixes bug
  12771. 23676; bugfix on 0.3.2.1-alpha.
  12772. o Minor features (build, compilation):
  12773. - The "check-changes" feature is now part of the "make check" tests;
  12774. we'll use it to try to prevent misformed changes files from
  12775. accumulating. Closes ticket 23564.
  12776. - Tor builds should now fail if there are any mismatches between the
  12777. C type representing a configuration variable and the C type the
  12778. data-driven parser uses to store a value there. Previously, we
  12779. needed to check these by hand, which sometimes led to mistakes.
  12780. Closes ticket 23643.
  12781. o Minor features (directory authorities):
  12782. - Remove longclaw's IPv6 address, as it will soon change. Authority
  12783. IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
  12784. 3/8 directory authorities with IPv6 addresses, but there are also
  12785. 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
  12786. o Minor features (hidden service, circuit, logging):
  12787. - Improve logging of many callsite in the circuit subsystem to print
  12788. the circuit identifier(s).
  12789. - Log when we cleanup an intro point from a service so we know when
  12790. and for what reason it happened. Closes ticket 23604.
  12791. o Minor features (logging):
  12792. - Log more circuit information whenever we are about to try to
  12793. package a relay cell on a circuit with a nonexistent n_chan.
  12794. Attempt to diagnose ticket 8185.
  12795. - Improve info-level log identification of particular circuits, to
  12796. help with debugging. Closes ticket 23645.
  12797. o Minor features (relay):
  12798. - When choosing which circuits can be expired as unused, consider
  12799. circuits from clients even if those clients used regular CREATE
  12800. cells to make them; and do not consider circuits from relays even
  12801. if they were made with CREATE_FAST. Part of ticket 22805.
  12802. o Minor features (robustness):
  12803. - Change several fatal assertions when flushing buffers into non-
  12804. fatal assertions, to prevent any recurrence of 23690.
  12805. o Minor features (spec conformance, bridge, diagnostic):
  12806. - When handling the USERADDR command on an ExtOrPort, warn when the
  12807. transports provides a USERADDR with no port. In a future version,
  12808. USERADDR commands of this format may be rejected. Detects problems
  12809. related to ticket 23080.
  12810. o Minor features (testing):
  12811. - Add a unit test to make sure that our own generated platform
  12812. string will be accepted by directory authorities. Closes
  12813. ticket 22109.
  12814. o Minor bugfixes (bootstrapping):
  12815. - When warning about state file clock skew, report the correct
  12816. direction for the detected skew. Fixes bug 23606; bugfix
  12817. on 0.2.8.1-alpha.
  12818. - Avoid an assertion failure when logging a state file clock skew
  12819. very early in bootstrapping. Fixes bug 23607; bugfix
  12820. on 0.3.2.1-alpha.
  12821. o Minor bugfixes (build, compilation):
  12822. - Fix a compilation warning when building with zstd support on
  12823. 32-bit platforms. Fixes bug 23568; bugfix on 0.3.1.1-alpha. Found
  12824. and fixed by Andreas Stieger.
  12825. - When searching for OpenSSL, don't accept any OpenSSL library that
  12826. lacks TLSv1_1_method(): Tor doesn't build with those versions.
  12827. Additionally, look in /usr/local/opt/openssl, if it's present.
  12828. These changes together repair the default build on OSX systems
  12829. with Homebrew installed. Fixes bug 23602; bugfix on 0.2.7.2-alpha.
  12830. o Minor bugfixes (compression):
  12831. - Handle a pathological case when decompressing Zstandard data when
  12832. the output buffer size is zero. Fixes bug 23551; bugfix
  12833. on 0.3.1.1-alpha.
  12834. o Minor bugfixes (documentation):
  12835. - Fix manpage to not refer to the obsolete (and misspelled)
  12836. UseEntryGuardsAsDirectoryGuards parameter in the description of
  12837. NumDirectoryGuards. Fixes bug 23611; bugfix on 0.2.4.8-alpha.
  12838. o Minor bugfixes (hidden service v3):
  12839. - Don't log an assertion failure when we can't find the right
  12840. information to extend to an introduction point. In rare cases,
  12841. this could happen, causing a warning, even though tor would
  12842. recover gracefully. Fixes bug 23159; bugfix on 0.3.2.1-alpha.
  12843. - Pad RENDEZVOUS cell up to the size of the legacy cell which is
  12844. much bigger so the rendezvous point can't distinguish which hidden
  12845. service protocol is being used. Fixes bug 23420; bugfix
  12846. on 0.3.2.1-alpha.
  12847. o Minor bugfixes (hidden service, relay):
  12848. - Avoid a possible double close of a circuit by the intro point on
  12849. error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610;
  12850. bugfix on 0.3.0.1-alpha.
  12851. o Minor bugfixes (logging, relay shutdown, annoyance):
  12852. - When a circuit is marked for close, do not attempt to package any
  12853. cells for channels on that circuit. Previously, we would detect
  12854. this condition lower in the call stack, when we noticed that the
  12855. circuit had no attached channel, and log an annoying message.
  12856. Fixes bug 8185; bugfix on 0.2.5.4-alpha.
  12857. o Minor bugfixes (scheduler):
  12858. - When switching schedulers due to a consensus change, we didn't
  12859. give the new scheduler a chance to react to the consensus. Fix
  12860. that. Fixes bug 23537; bugfix on 0.3.2.1-alpha.
  12861. - Make the KISTSchedRunInterval option a non negative value. With
  12862. this, the way to disable KIST through the consensus is to set it
  12863. to 0. Fixes bug 23539; bugfix on 0.3.2.1-alpha.
  12864. - Only notice log the selected scheduler when we switch scheduler
  12865. types. Fixes bug 23552; bugfix on 0.3.2.1-alpha.
  12866. - Avoid a compilation warning on macOS in scheduler_ev_add() caused
  12867. by a different tv_usec data type. Fixes bug 23575; bugfix
  12868. on 0.3.2.1-alpha.
  12869. - Make a hard exit if tor is unable to pick a scheduler which can
  12870. happen if the user specifies a scheduler type that is not
  12871. supported and not other types in Schedulers. Fixes bug 23581;
  12872. bugfix on 0.3.2.1-alpha.
  12873. - Properly initialize the scheduler last run time counter so it is
  12874. not 0 at the first tick. Fixes bug 23696; bugfix on 0.3.2.1-alpha.
  12875. o Minor bugfixes (testing):
  12876. - Capture and detect several "Result does not fit" warnings in unit
  12877. tests on platforms with 32-bit time_t. Fixes bug 21800; bugfix
  12878. on 0.2.9.3-alpha.
  12879. - Fix additional channelpadding unit test failures by using mocked
  12880. time instead of actual time for all tests. Fixes bug 23608; bugfix
  12881. on 0.3.1.1-alpha.
  12882. - The removal of some old scheduler options caused some tests to
  12883. fail on BSD systems. Assume current behavior is correct and make
  12884. the tests pass again. Fixes bug 23566; bugfix on 0.3.2.1-alpha.
  12885. o Code simplification and refactoring:
  12886. - Remove various ways of testing circuits and connections for
  12887. "clientness"; instead, favor channel_is_client(). Part of
  12888. ticket 22805.
  12889. o Deprecated features:
  12890. - The ReachableDirAddresses and ClientPreferIPv6DirPort options are
  12891. now deprecated; they do not apply to relays, and they have had no
  12892. effect on clients since 0.2.8.x. Closes ticket 19704.
  12893. o Documentation:
  12894. - HiddenServiceVersion man page entry wasn't mentioning the now
  12895. supported version 3. Fixes ticket 23580; bugfix on 0.3.2.1-alpha.
  12896. - Clarify that the Address option is entirely about setting an
  12897. advertised IPv4 address. Closes ticket 18891.
  12898. - Clarify the manpage's use of the term "address" to clarify what
  12899. kind of address is intended. Closes ticket 21405.
  12900. - Document that onion service subdomains are allowed, and ignored.
  12901. Closes ticket 18736.
  12902. Changes in version 0.3.2.1-alpha - 2017-09-18
  12903. Tor 0.3.2.1-alpha is the first release in the 0.3.2.x series. It
  12904. includes support for our next-generation ("v3") onion service
  12905. protocol, and adds a new circuit scheduler for more responsive
  12906. forwarding decisions from relays. There are also numerous other small
  12907. features and bugfixes here.
  12908. Below are the changes since Tor 0.3.1.7.
  12909. o Major feature (scheduler, channel):
  12910. - Tor now uses new schedulers to decide which circuits should
  12911. deliver cells first, in order to improve congestion at relays. The
  12912. first type is called "KIST" ("Kernel Informed Socket Transport"),
  12913. and is only available on Linux-like systems: it uses feedback from
  12914. the kernel to prevent the kernel's TCP buffers from growing too
  12915. full. The second new scheduler type is called "KISTLite": it
  12916. behaves the same as KIST, but runs on systems without kernel
  12917. support for inspecting TCP implementation details. The old
  12918. scheduler is still available, under the name "Vanilla". To change
  12919. the default scheduler preference order, use the new "Schedulers"
  12920. option. (The default preference order is "KIST,KISTLite,Vanilla".)
  12921. Matt Traudt implemented KIST, based on research by Rob Jansen,
  12922. John Geddes, Christ Wacek, Micah Sherr, and Paul Syverson. For
  12923. more information, see the design paper at
  12924. http://www.robgjansen.com/publications/kist-sec2014.pdf and the
  12925. followup implementation paper at https://arxiv.org/abs/1709.01044.
  12926. Closes ticket 12541.
  12927. o Major features (next-generation onion services):
  12928. - Tor now supports the next-generation onion services protocol for
  12929. clients and services! As part of this release, the core of
  12930. proposal 224 has been implemented and is available for
  12931. experimentation and testing by our users. This newer version of
  12932. onion services ("v3") features many improvements over the legacy
  12933. system, including:
  12934. a) Better crypto (replaced SHA1/DH/RSA1024
  12935. with SHA3/ed25519/curve25519)
  12936. b) Improved directory protocol, leaking much less information to
  12937. directory servers.
  12938. c) Improved directory protocol, with smaller surface for
  12939. targeted attacks.
  12940. d) Better onion address security against impersonation.
  12941. e) More extensible introduction/rendezvous protocol.
  12942. f) A cleaner and more modular codebase.
  12943. You can identify a next-generation onion address by its length:
  12944. they are 56 characters long, as in
  12945. "4acth47i6kxnvkewtm6q7ib2s3ufpo5sqbsnzjpbi7utijcltosqemad.onion".
  12946. In the future, we will release more options and features for v3
  12947. onion services, but we first need a testing period, so that the
  12948. current codebase matures and becomes more robust. Planned features
  12949. include: offline keys, advanced client authorization, improved
  12950. guard algorithms, and statistics. For full details, see
  12951. proposal 224.
  12952. Legacy ("v2") onion services will still work for the foreseeable
  12953. future, and will remain the default until this new codebase gets
  12954. tested and hardened. Service operators who want to experiment with
  12955. the new system can use the 'HiddenServiceVersion 3' torrc
  12956. directive along with the regular onion service configuration
  12957. options. We will publish a blog post about this new feature
  12958. soon! Enjoy!
  12959. o Major bugfixes (usability, control port):
  12960. - Report trusted clock skew indications as bootstrap errors, so
  12961. controllers can more easily alert users when their clocks are
  12962. wrong. Fixes bug 23506; bugfix on 0.1.2.6-alpha.
  12963. o Minor features (bug detection):
  12964. - Log a warning message with a stack trace for any attempt to call
  12965. get_options() during option validation. This pattern has caused
  12966. subtle bugs in the past. Closes ticket 22281.
  12967. o Minor features (client):
  12968. - You can now use Tor as a tunneled HTTP proxy: use the new
  12969. HTTPTunnelPort option to open a port that accepts HTTP CONNECT
  12970. requests. Closes ticket 22407.
  12971. - Add an extra check to make sure that we always use the newer guard
  12972. selection code for picking our guards. Closes ticket 22779.
  12973. - When downloading (micro)descriptors, don't split the list into
  12974. multiple requests unless we want at least 32 descriptors.
  12975. Previously, we split at 4, not 32, which led to significant
  12976. overhead in HTTP request size and degradation in compression
  12977. performance. Closes ticket 23220.
  12978. o Minor features (command line):
  12979. - Add a new commandline option, --key-expiration, which prints when
  12980. the current signing key is going to expire. Implements ticket
  12981. 17639; patch by Isis Lovecruft.
  12982. o Minor features (control port):
  12983. - If an application tries to use the control port as an HTTP proxy,
  12984. respond with a meaningful "This is the Tor control port" message,
  12985. and log the event. Closes ticket 1667. Patch from Ravi
  12986. Chandra Padmala.
  12987. - Provide better error message for GETINFO desc/(id|name) when not
  12988. fetching router descriptors. Closes ticket 5847. Patch by
  12989. Kevin Butler.
  12990. - Add GETINFO "{desc,md}/download-enabled", to inform the controller
  12991. whether Tor will try to download router descriptors and
  12992. microdescriptors respectively. Closes ticket 22684.
  12993. - Added new GETINFO targets "ip-to-country/{ipv4,ipv6}-available",
  12994. so controllers can tell whether the geoip databases are loaded.
  12995. Closes ticket 23237.
  12996. - Adds a timestamp field to the CIRC_BW and STREAM_BW bandwidth
  12997. events. Closes ticket 19254. Patch by "DonnchaC".
  12998. o Minor features (development support):
  12999. - Developers can now generate a call-graph for Tor using the
  13000. "calltool" python program, which post-processes object dumps. It
  13001. should work okay on many Linux and OSX platforms, and might work
  13002. elsewhere too. To run it, install calltool from
  13003. https://gitweb.torproject.org/user/nickm/calltool.git and run
  13004. "make callgraph". Closes ticket 19307.
  13005. o Minor features (ed25519):
  13006. - Add validation function to checks for torsion components in
  13007. ed25519 public keys, used by prop224 client-side code. Closes
  13008. ticket 22006. Math help by Ian Goldberg.
  13009. o Minor features (exit relay, DNS):
  13010. - Improve the clarity and safety of the log message from evdns when
  13011. receiving an apparently spoofed DNS reply. Closes ticket 3056.
  13012. o Minor features (integration, hardening):
  13013. - Add a new NoExec option to prevent Tor from running other
  13014. programs. When this option is set to 1, Tor will never try to run
  13015. another program, regardless of the settings of
  13016. PortForwardingHelper, ClientTransportPlugin, or
  13017. ServerTransportPlugin. Once NoExec is set, it cannot be disabled
  13018. without restarting Tor. Closes ticket 22976.
  13019. o Minor features (logging):
  13020. - Improve the warning message for specifying a relay by nickname.
  13021. The previous message implied that nickname registration was still
  13022. part of the Tor network design, which it isn't. Closes
  13023. ticket 20488.
  13024. - If the sandbox filter fails to load, suggest to the user that
  13025. their kernel might not support seccomp2. Closes ticket 23090.
  13026. o Minor features (portability):
  13027. - Check at configure time whether uint8_t is the same type as
  13028. unsigned char. Lots of existing code already makes this
  13029. assumption, and there could be strict aliasing issues if the
  13030. assumption is violated. Closes ticket 22410.
  13031. o Minor features (relay, configuration):
  13032. - Reject attempts to use relative file paths when RunAsDaemon is
  13033. set. Previously, Tor would accept these, but the directory-
  13034. changing step of RunAsDaemon would give strange and/or confusing
  13035. results. Closes ticket 22731.
  13036. o Minor features (startup, safety):
  13037. - When configured to write a PID file, Tor now exits if it is unable
  13038. to do so. Previously, it would warn and continue. Closes
  13039. ticket 20119.
  13040. o Minor features (static analysis):
  13041. - The BUG() macro has been changed slightly so that Coverity no
  13042. longer complains about dead code if the bug is impossible. Closes
  13043. ticket 23054.
  13044. o Minor features (testing):
  13045. - The default chutney network tests now include tests for the v3
  13046. hidden service design. Make sure you have the latest version of
  13047. chutney if you want to run these. Closes ticket 22437.
  13048. - Add a unit test to verify that we can parse a hardcoded v2 hidden
  13049. service descriptor. Closes ticket 15554.
  13050. o Minor bugfixes (certificate handling):
  13051. - Fix a time handling bug in Tor certificates set to expire after
  13052. the year 2106. Fixes bug 23055; bugfix on 0.3.0.1-alpha. Found by
  13053. Coverity as CID 1415728.
  13054. o Minor bugfixes (client, usability):
  13055. - Refrain from needlessly rejecting SOCKS5-with-hostnames and
  13056. SOCKS4a requests that contain IP address strings, even when
  13057. SafeSocks in enabled, as this prevents user from connecting to
  13058. known IP addresses without relying on DNS for resolving. SafeSocks
  13059. still rejects SOCKS connections that connect to IP addresses when
  13060. those addresses are _not_ encoded as hostnames. Fixes bug 22461;
  13061. bugfix on Tor 0.2.6.2-alpha.
  13062. o Minor bugfixes (code correctness):
  13063. - Call htons() in extend_cell_format() for encoding a 16-bit value.
  13064. Previously we used ntohs(), which happens to behave the same on
  13065. all the platforms we support, but which isn't really correct.
  13066. Fixes bug 23106; bugfix on 0.2.4.8-alpha.
  13067. - For defense-in-depth, make the controller's write_escaped_data()
  13068. function robust to extremely long inputs. Fixes bug 19281; bugfix
  13069. on 0.1.1.1-alpha. Reported by Guido Vranken.
  13070. o Minor bugfixes (compilation):
  13071. - Fix unused-variable warnings in donna's Curve25519 SSE2 code.
  13072. Fixes bug 22895; bugfix on 0.2.7.2-alpha.
  13073. o Minor bugfixes (consensus expiry):
  13074. - Check for adequate directory information correctly. Previously, Tor
  13075. would reconsider whether it had sufficient directory information
  13076. every 2 minutes. Fixes bug 23091; bugfix on 0.2.0.19-alpha.
  13077. o Minor bugfixes (directory protocol):
  13078. - Directory servers now include a "Date:" http header for response
  13079. codes other than 200. Clients starting with a skewed clock and a
  13080. recent consensus were getting "304 Not modified" responses from
  13081. directory authorities, so without the Date header, the client
  13082. would never hear about a wrong clock. Fixes bug 23499; bugfix
  13083. on 0.0.8rc1.
  13084. - Make clients wait for 6 seconds before trying to download a
  13085. consensus from an authority. Fixes bug 17750; bugfix
  13086. on 0.2.8.1-alpha.
  13087. o Minor bugfixes (DoS-resistance):
  13088. - If future code asks if there are any running bridges, without
  13089. checking if bridges are enabled, log a BUG warning rather than
  13090. crashing. Fixes bug 23524; bugfix on 0.3.0.1-alpha.
  13091. o Minor bugfixes (format strictness):
  13092. - Restrict several data formats to decimal. Previously, the
  13093. BuildTimeHistogram entries in the state file, the "bw=" entries in
  13094. the bandwidth authority file, and the process IDs passed to the
  13095. __OwningControllerProcess option could all be specified in hex or
  13096. octal as well as in decimal. This was not an intentional feature.
  13097. Fixes bug 22802; bugfixes on 0.2.2.1-alpha, 0.2.2.2-alpha,
  13098. and 0.2.2.28-beta.
  13099. o Minor bugfixes (heartbeat):
  13100. - If we fail to write a heartbeat message, schedule a retry for the
  13101. minimum heartbeat interval number of seconds in the future. Fixes
  13102. bug 19476; bugfix on 0.2.3.1-alpha.
  13103. o Minor bugfixes (linux seccomp2 sandbox, logging):
  13104. - Fix some messages on unexpected errors from the seccomp2 library.
  13105. Fixes bug 22750; bugfix on 0.2.5.1-alpha. Patch from "cypherpunks".
  13106. o Minor bugfixes (logging):
  13107. - Remove duplicate log messages regarding opening non-local
  13108. SocksPorts upon parsing config and opening listeners at startup.
  13109. Fixes bug 4019; bugfix on 0.2.3.3-alpha.
  13110. - Use a more comprehensible log message when telling the user
  13111. they've excluded every running exit node. Fixes bug 7890; bugfix
  13112. on 0.2.2.25-alpha.
  13113. - When logging the number of descriptors we intend to download per
  13114. directory request, do not log a number higher than then the number
  13115. of descriptors we're fetching in total. Fixes bug 19648; bugfix
  13116. on 0.1.1.8-alpha.
  13117. - When warning about a directory owned by the wrong user, log the
  13118. actual name of the user owning the directory. Previously, we'd log
  13119. the name of the process owner twice. Fixes bug 23487; bugfix
  13120. on 0.2.9.1-alpha.
  13121. - The tor specification says hop counts are 1-based, so fix two log
  13122. messages that mistakenly logged 0-based hop counts. Fixes bug
  13123. 18982; bugfix on 0.2.6.2-alpha and 0.2.4.5-alpha. Patch by teor.
  13124. Credit to Xiaofan Li for reporting this issue.
  13125. o Minor bugfixes (portability):
  13126. - Stop using the PATH_MAX variable, which is not defined on GNU
  13127. Hurd. Fixes bug 23098; bugfix on 0.3.1.1-alpha.
  13128. o Minor bugfixes (relay):
  13129. - When uploading our descriptor for the first time after startup,
  13130. report the reason for uploading as "Tor just started" rather than
  13131. leaving it blank. Fixes bug 22885; bugfix on 0.2.3.4-alpha.
  13132. - Avoid unnecessary calls to directory_fetches_from_authorities() on
  13133. relays, to prevent spurious address resolutions and descriptor
  13134. rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
  13135. bugfix on in 0.2.8.1-alpha.
  13136. o Minor bugfixes (tests):
  13137. - Fix a broken unit test for the OutboundAddress option: the parsing
  13138. function was never returning an error on failure. Fixes bug 23366;
  13139. bugfix on 0.3.0.3-alpha.
  13140. - Fix a signed-integer overflow in the unit tests for
  13141. dir/download_status_random_backoff, which was untriggered until we
  13142. fixed bug 17750. Fixes bug 22924; bugfix on 0.2.9.1-alpha.
  13143. o Minor bugfixes (usability, control port):
  13144. - Stop making an unnecessary routerlist check in NETINFO clock skew
  13145. detection; this was preventing clients from reporting NETINFO clock
  13146. skew to controllers. Fixes bug 23532; bugfix on 0.2.4.4-alpha.
  13147. o Code simplification and refactoring:
  13148. - Extract the code for handling newly-open channels into a separate
  13149. function from the general code to handle channel state
  13150. transitions. This change simplifies our callgraph, reducing the
  13151. size of the largest strongly connected component by roughly a
  13152. factor of two. Closes ticket 22608.
  13153. - Remove dead code for largely unused statistics on the number of
  13154. times we've attempted various public key operations. Fixes bug
  13155. 19871; bugfix on 0.1.2.4-alpha. Fix by Isis Lovecruft.
  13156. - Remove several now-obsolete functions for asking about old
  13157. variants directory authority status. Closes ticket 22311; patch
  13158. from "huyvq".
  13159. - Remove some of the code that once supported "Named" and "Unnamed"
  13160. routers. Authorities no longer vote for these flags. Closes
  13161. ticket 22215.
  13162. - Rename the obsolete malleable hybrid_encrypt functions used in TAP
  13163. and old hidden services, to indicate that they aren't suitable for
  13164. new protocols or formats. Closes ticket 23026.
  13165. - Replace our STRUCT_OFFSET() macro with offsetof(). Closes ticket
  13166. 22521. Patch from Neel Chauhan.
  13167. - Split the enormous circuit_send_next_onion_skin() function into
  13168. multiple subfunctions. Closes ticket 22804.
  13169. - Split the portions of the buffer.c module that handle particular
  13170. protocols into separate modules. Part of ticket 23149.
  13171. - Use our test macros more consistently, to produce more useful
  13172. error messages when our unit tests fail. Add coccinelle patches to
  13173. allow us to re-check for test macro uses. Closes ticket 22497.
  13174. o Deprecated features:
  13175. - Deprecate HTTPProxy/HTTPProxyAuthenticator config options. They
  13176. only applies to direct unencrypted HTTP connections to your
  13177. directory server, which your Tor probably isn't using. Closes
  13178. ticket 20575.
  13179. o Documentation:
  13180. - Clarify in the manual that "Sandbox 1" is only supported on Linux
  13181. kernels. Closes ticket 22677.
  13182. - Document all values of PublishServerDescriptor in the manpage.
  13183. Closes ticket 15645.
  13184. - Improve the documentation for the directory port part of the
  13185. DirAuthority line. Closes ticket 20152.
  13186. - Restore documentation for the authorities' "approved-routers"
  13187. file. Closes ticket 21148.
  13188. o Removed features:
  13189. - The AllowDotExit option has been removed as unsafe. It has been
  13190. deprecated since 0.2.9.2-alpha. Closes ticket 23426.
  13191. - The ClientDNSRejectInternalAddresses flag can no longer be set on
  13192. non-testing networks. It has been deprecated since 0.2.9.2-alpha.
  13193. Closes ticket 21031.
  13194. - The controller API no longer includes an AUTHDIR_NEWDESCS event:
  13195. nobody was using it any longer. Closes ticket 22377.
  13196. Changes in version 0.2.8.15 - 2017-09-18
  13197. Tor 0.2.8.15 backports a collection of bugfixes from later
  13198. Tor series.
  13199. Most significantly, it includes a fix for TROVE-2017-008, a
  13200. security bug that affects hidden services running with the
  13201. SafeLogging option disabled. For more information, see
  13202. https://trac.torproject.org/projects/tor/ticket/23490
  13203. Note that Tor 0.2.8.x will no longer be supported after 1 Jan
  13204. 2018. We suggest that you upgrade to the latest stable release if
  13205. possible. If you can't, we recommend that you upgrade at least to
  13206. 0.2.9, which will be supported until 2020.
  13207. o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
  13208. - Avoid an assertion failure bug affecting our implementation of
  13209. inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
  13210. handling of "0xx" differs from what we had expected. Fixes bug
  13211. 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
  13212. o Minor features:
  13213. - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
  13214. Country database.
  13215. o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha):
  13216. - Backport a fix for an "unused variable" warning that appeared
  13217. in some versions of mingw. Fixes bug 22838; bugfix on
  13218. 0.2.8.1-alpha.
  13219. o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha):
  13220. - Fix a memset() off the end of an array when packing cells. This
  13221. bug should be harmless in practice, since the corrupted bytes are
  13222. still in the same structure, and are always padding bytes,
  13223. ignored, or immediately overwritten, depending on compiler
  13224. behavior. Nevertheless, because the memset()'s purpose is to make
  13225. sure that any other cell-handling bugs can't expose bytes to the
  13226. network, we need to fix it. Fixes bug 22737; bugfix on
  13227. 0.2.4.11-alpha. Fixes CID 1401591.
  13228. o Build features (backport from 0.3.1.5-alpha):
  13229. - Tor's repository now includes a Travis Continuous Integration (CI)
  13230. configuration file (.travis.yml). This is meant to help new
  13231. developers and contributors who fork Tor to a Github repository be
  13232. better able to test their changes, and understand what we expect
  13233. to pass. To use this new build feature, you must fork Tor to your
  13234. Github account, then go into the "Integrations" menu in the
  13235. repository settings for your fork and enable Travis, then push
  13236. your changes. Closes ticket 22636.
  13237. Changes in version 0.2.9.12 - 2017-09-18
  13238. Tor 0.2.9.12 backports a collection of bugfixes from later
  13239. Tor series.
  13240. Most significantly, it includes a fix for TROVE-2017-008, a
  13241. security bug that affects hidden services running with the
  13242. SafeLogging option disabled. For more information, see
  13243. https://trac.torproject.org/projects/tor/ticket/23490
  13244. o Major features (security, backport from 0.3.0.2-alpha):
  13245. - Change the algorithm used to decide DNS TTLs on client and server
  13246. side, to better resist DNS-based correlation attacks like the
  13247. DefecTor attack of Greschbach, Pulls, Roberts, Winter, and
  13248. Feamster. Now relays only return one of two possible DNS TTL
  13249. values, and clients are willing to believe DNS TTL values up to 3
  13250. hours long. Closes ticket 19769.
  13251. o Major bugfixes (crash, directory connections, backport from 0.3.0.5-rc):
  13252. - Fix a rare crash when sending a begin cell on a circuit whose
  13253. linked directory connection had already been closed. Fixes bug
  13254. 21576; bugfix on 0.2.9.3-alpha. Reported by Alec Muffett.
  13255. o Major bugfixes (DNS, backport from 0.3.0.2-alpha):
  13256. - Fix a bug that prevented exit nodes from caching DNS records for
  13257. more than 60 seconds. Fixes bug 19025; bugfix on 0.2.4.7-alpha.
  13258. o Major bugfixes (linux TPROXY support, backport from 0.3.1.1-alpha):
  13259. - Fix a typo that had prevented TPROXY-based transparent proxying
  13260. from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
  13261. Patch from "d4fq0fQAgoJ".
  13262. o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
  13263. - Avoid an assertion failure bug affecting our implementation of
  13264. inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
  13265. handling of "0xx" differs from what we had expected. Fixes bug
  13266. 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
  13267. o Minor features (code style, backport from 0.3.1.3-alpha):
  13268. - Add "Falls through" comments to our codebase, in order to silence
  13269. GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas
  13270. Stieger. Closes ticket 22446.
  13271. o Minor features (geoip):
  13272. - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
  13273. Country database.
  13274. o Minor bugfixes (bandwidth accounting, backport from 0.3.1.1-alpha):
  13275. - Roll over monthly accounting at the configured hour and minute,
  13276. rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1.
  13277. Found by Andrey Karpov with PVS-Studio.
  13278. o Minor bugfixes (compilation, backport from 0.3.1.5-alpha):
  13279. - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug 22915;
  13280. bugfix on 0.2.8.1-alpha.
  13281. - Fix warnings when building with libscrypt and openssl scrypt support
  13282. on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha.
  13283. - When building with certain versions the mingw C header files, avoid
  13284. float-conversion warnings when calling the C functions isfinite(),
  13285. isnan(), and signbit(). Fixes bug 22801; bugfix on 0.2.8.1-alpha.
  13286. o Minor bugfixes (compilation, backport from 0.3.1.7):
  13287. - Avoid compiler warnings in the unit tests for running tor_sscanf()
  13288. with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha.
  13289. o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha):
  13290. - Backport a fix for an "unused variable" warning that appeared
  13291. in some versions of mingw. Fixes bug 22838; bugfix on
  13292. 0.2.8.1-alpha.
  13293. o Minor bugfixes (controller, backport from 0.3.1.7):
  13294. - Do not crash when receiving a HSPOST command with an empty body.
  13295. Fixes part of bug 22644; bugfix on 0.2.7.1-alpha.
  13296. - Do not crash when receiving a POSTDESCRIPTOR command with an
  13297. empty body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha.
  13298. o Minor bugfixes (coverity build support, backport from 0.3.1.5-alpha):
  13299. - Avoid Coverity build warnings related to our BUG() macro. By
  13300. default, Coverity treats BUG() as the Linux kernel does: an
  13301. instant abort(). We need to override that so our BUG() macro
  13302. doesn't prevent Coverity from analyzing functions that use it.
  13303. Fixes bug 23030; bugfix on 0.2.9.1-alpha.
  13304. o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha):
  13305. - Fix a memset() off the end of an array when packing cells. This
  13306. bug should be harmless in practice, since the corrupted bytes are
  13307. still in the same structure, and are always padding bytes,
  13308. ignored, or immediately overwritten, depending on compiler
  13309. behavior. Nevertheless, because the memset()'s purpose is to make
  13310. sure that any other cell-handling bugs can't expose bytes to the
  13311. network, we need to fix it. Fixes bug 22737; bugfix on
  13312. 0.2.4.11-alpha. Fixes CID 1401591.
  13313. o Minor bugfixes (file limits, osx, backport from 0.3.1.5-alpha):
  13314. - When setting the maximum number of connections allowed by the OS,
  13315. always allow some extra file descriptors for other files. Fixes
  13316. bug 22797; bugfix on 0.2.0.10-alpha.
  13317. o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.5-alpha):
  13318. - Avoid a sandbox failure when trying to re-bind to a socket and
  13319. mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha.
  13320. o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.4-alpha):
  13321. - Permit the fchmod system call, to avoid crashing on startup when
  13322. starting with the seccomp2 sandbox and an unexpected set of
  13323. permissions on the data directory or its contents. Fixes bug
  13324. 22516; bugfix on 0.2.5.4-alpha.
  13325. o Minor bugfixes (relay, backport from 0.3.0.5-rc):
  13326. - Avoid a double-marked-circuit warning that could happen when we
  13327. receive DESTROY cells under heavy load. Fixes bug 20059; bugfix
  13328. on 0.1.0.1-rc.
  13329. o Minor bugfixes (voting consistency, backport from 0.3.1.1-alpha):
  13330. - Reject version numbers with non-numeric prefixes (such as +, -, or
  13331. whitespace). Disallowing whitespace prevents differential version
  13332. parsing between POSIX-based and Windows platforms. Fixes bug 21507
  13333. and part of 21508; bugfix on 0.0.8pre1.
  13334. o Build features (backport from 0.3.1.5-alpha):
  13335. - Tor's repository now includes a Travis Continuous Integration (CI)
  13336. configuration file (.travis.yml). This is meant to help new
  13337. developers and contributors who fork Tor to a Github repository be
  13338. better able to test their changes, and understand what we expect
  13339. to pass. To use this new build feature, you must fork Tor to your
  13340. Github account, then go into the "Integrations" menu in the
  13341. repository settings for your fork and enable Travis, then push
  13342. your changes. Closes ticket 22636.
  13343. Changes in version 0.3.0.11 - 2017-09-18
  13344. Tor 0.3.0.11 backports a collection of bugfixes from Tor the 0.3.1
  13345. series.
  13346. Most significantly, it includes a fix for TROVE-2017-008, a
  13347. security bug that affects hidden services running with the
  13348. SafeLogging option disabled. For more information, see
  13349. https://trac.torproject.org/projects/tor/ticket/23490
  13350. o Minor features (code style, backport from 0.3.1.7):
  13351. - Add "Falls through" comments to our codebase, in order to silence
  13352. GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas
  13353. Stieger. Closes ticket 22446.
  13354. o Minor features:
  13355. - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
  13356. Country database.
  13357. o Minor bugfixes (compilation, backport from 0.3.1.7):
  13358. - Avoid compiler warnings in the unit tests for calling tor_sscanf()
  13359. with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha.
  13360. o Minor bugfixes (controller, backport from 0.3.1.7):
  13361. - Do not crash when receiving a HSPOST command with an empty body.
  13362. Fixes part of bug 22644; bugfix on 0.2.7.1-alpha.
  13363. - Do not crash when receiving a POSTDESCRIPTOR command with an empty
  13364. body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha.
  13365. o Minor bugfixes (file limits, osx, backport from 0.3.1.5-alpha):
  13366. - When setting the maximum number of connections allowed by the OS,
  13367. always allow some extra file descriptors for other files. Fixes
  13368. bug 22797; bugfix on 0.2.0.10-alpha.
  13369. o Minor bugfixes (logging, relay, backport from 0.3.1.6-rc):
  13370. - Remove a forgotten debugging message when an introduction point
  13371. successfully establishes a hidden service prop224 circuit with
  13372. a client.
  13373. - Change three other log_warn() for an introduction point to
  13374. protocol warnings, because they can be failure from the network
  13375. and are not relevant to the operator. Fixes bug 23078; bugfix on
  13376. 0.3.0.1-alpha and 0.3.0.2-alpha.
  13377. Changes in version 0.3.1.7 - 2017-09-18
  13378. Tor 0.3.1.7 is the first stable release in the 0.3.1 series.
  13379. With the 0.3.1 series, Tor now serves and downloads directory
  13380. information in more compact formats, to save on bandwidth overhead. It
  13381. also contains a new padding system to resist netflow-based traffic
  13382. analysis, and experimental support for building parts of Tor in Rust
  13383. (though no parts of Tor are in Rust yet). There are also numerous
  13384. small features, bugfixes on earlier release series, and groundwork for
  13385. the hidden services revamp of 0.3.2.
  13386. This release also includes a fix for TROVE-2017-008, a security bug
  13387. that affects hidden services running with the SafeLogging option
  13388. disabled. For more information, see
  13389. https://trac.torproject.org/projects/tor/ticket/23490
  13390. Per our stable release policy, we plan to support each stable release
  13391. series for at least the next nine months, or for three months after
  13392. the first stable release of the next series: whichever is longer. If
  13393. you need a release with long-term support, we recommend that you stay
  13394. with the 0.2.9 series.
  13395. Below is a list of the changes since 0.3.1.6-rc. For a list of all
  13396. changes since 0.3.0, see the ReleaseNotes file.
  13397. o Major bugfixes (security, hidden services, loggging):
  13398. - Fix a bug where we could log uninitialized stack when a certain
  13399. hidden service error occurred while SafeLogging was disabled.
  13400. Fixes bug #23490; bugfix on 0.2.7.2-alpha. This is also tracked as
  13401. TROVE-2017-008 and CVE-2017-0380.
  13402. o Minor features (defensive programming):
  13403. - Create a pair of consensus parameters, nf_pad_tor2web and
  13404. nf_pad_single_onion, to disable netflow padding in the consensus
  13405. for non-anonymous connections in case the overhead is high. Closes
  13406. ticket 17857.
  13407. o Minor features (diagnostic):
  13408. - Add a stack trace to the bug warnings that can be logged when
  13409. trying to send an outgoing relay cell with n_chan == 0. Diagnostic
  13410. attempt for bug 23105.
  13411. o Minor features (geoip):
  13412. - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
  13413. Country database.
  13414. o Minor bugfixes (compilation):
  13415. - Avoid compiler warnings in the unit tests for calling tor_sscanf()
  13416. with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha.
  13417. o Minor bugfixes (controller):
  13418. - Do not crash when receiving a HSPOST command with an empty body.
  13419. Fixes part of bug 22644; bugfix on 0.2.7.1-alpha.
  13420. - Do not crash when receiving a POSTDESCRIPTOR command with an empty
  13421. body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha.
  13422. o Minor bugfixes (relay):
  13423. - Inform the geoip and rephist modules about all requests, even on
  13424. relays that are only fetching microdescriptors. Fixes a bug
  13425. related to 21585; bugfix on 0.3.0.1-alpha.
  13426. o Minor bugfixes (unit tests):
  13427. - Fix a channelpadding unit test failure on slow systems by using
  13428. mocked time instead of actual time. Fixes bug 23077; bugfix
  13429. on 0.3.1.1-alpha.
  13430. Changes in version 0.3.1.6-rc - 2017-09-05
  13431. Tor 0.3.1.6-rc fixes a few small bugs and annoyances in the 0.3.1
  13432. release series, including a bug that produced weird behavior on
  13433. Windows directory caches.
  13434. This is the first release candidate in the Tor 0.3.1 series. If we
  13435. find no new bugs or regressions here, the first stable 0.3.1 release
  13436. will be nearly identical to it.
  13437. o Major bugfixes (windows, directory cache):
  13438. - On Windows, do not try to delete cached consensus documents and
  13439. diffs before they are unmapped from memory--Windows won't allow
  13440. that. Instead, allow the consensus cache directory to grow larger,
  13441. to hold files that might need to stay around longer. Fixes bug
  13442. 22752; bugfix on 0.3.1.1-alpha.
  13443. o Minor features (directory authority):
  13444. - Improve the message that authorities report to relays that present
  13445. RSA/Ed25519 keypairs that conflict with previously pinned keys.
  13446. Closes ticket 22348.
  13447. o Minor features (geoip):
  13448. - Update geoip and geoip6 to the August 3 2017 Maxmind GeoLite2
  13449. Country database.
  13450. o Minor features (testing):
  13451. - Add more tests for compression backend initialization. Closes
  13452. ticket 22286.
  13453. o Minor bugfixes (directory cache):
  13454. - Fix a memory leak when recovering space in the consensus cache.
  13455. Fixes bug 23139; bugfix on 0.3.1.1-alpha.
  13456. o Minor bugfixes (hidden service):
  13457. - Increase the number of circuits that a service is allowed to
  13458. open over a specific period of time. The value was lower than it
  13459. should be (8 vs 12) in the normal case of 3 introduction points.
  13460. Fixes bug 22159; bugfix on 0.3.0.5-rc.
  13461. - Fix a BUG warning during HSv3 descriptor decoding that could be
  13462. cause by a specially crafted descriptor. Fixes bug 23233; bugfix
  13463. on 0.3.0.1-alpha. Bug found by "haxxpop".
  13464. - Rate-limit the log messages if we exceed the maximum number of
  13465. allowed intro circuits. Fixes bug 22159; bugfix on 0.3.1.1-alpha.
  13466. o Minor bugfixes (logging, relay):
  13467. - Remove a forgotten debugging message when an introduction point
  13468. successfully establishes a hidden service prop224 circuit with
  13469. a client.
  13470. - Change three other log_warn() for an introduction point to
  13471. protocol warnings, because they can be failure from the network
  13472. and are not relevant to the operator. Fixes bug 23078; bugfix on
  13473. 0.3.0.1-alpha and 0.3.0.2-alpha.
  13474. o Minor bugfixes (relay):
  13475. - When a relay is not running as a directory cache, it will no
  13476. longer generate compressed consensuses and consensus diff
  13477. information. Previously, this was a waste of disk and CPU. Fixes
  13478. bug 23275; bugfix on 0.3.1.1-alpha.
  13479. o Minor bugfixes (robustness, error handling):
  13480. - Improve our handling of the cases where OpenSSL encounters a
  13481. memory error while encoding keys and certificates. We haven't
  13482. observed these errors in the wild, but if they do happen, we now
  13483. detect and respond better. Fixes bug 19418; bugfix on all versions
  13484. of Tor. Reported by Guido Vranken.
  13485. o Minor bugfixes (stability):
  13486. - Avoid crashing on a double-free when unable to load or process an
  13487. included file. Fixes bug 23155; bugfix on 0.3.1.1-alpha. Found
  13488. with the clang static analyzer.
  13489. o Minor bugfixes (testing):
  13490. - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
  13491. bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
  13492. - Port the hs_ntor handshake test to work correctly with recent
  13493. versions of the pysha3 module. Fixes bug 23071; bugfix
  13494. on 0.3.1.1-alpha.
  13495. o Minor bugfixes (Windows service):
  13496. - When running as a Windows service, set the ID of the main thread
  13497. correctly. Failure to do so made us fail to send log messages to
  13498. the controller in 0.2.1.16-rc, slowed down controller event
  13499. delivery in 0.2.7.3-rc and later, and crash with an assertion
  13500. failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha.
  13501. Patch and diagnosis from "Vort".
  13502. Changes in version 0.3.0.10 - 2017-08-02
  13503. Tor 0.3.0.10 backports a collection of small-to-medium bugfixes
  13504. from the current Tor alpha series. OpenBSD users and TPROXY users
  13505. should upgrade; others are probably okay sticking with 0.3.0.9.
  13506. o Major features (build system, continuous integration, backport from 0.3.1.5-alpha):
  13507. - Tor's repository now includes a Travis Continuous Integration (CI)
  13508. configuration file (.travis.yml). This is meant to help new
  13509. developers and contributors who fork Tor to a Github repository be
  13510. better able to test their changes, and understand what we expect
  13511. to pass. To use this new build feature, you must fork Tor to your
  13512. Github account, then go into the "Integrations" menu in the
  13513. repository settings for your fork and enable Travis, then push
  13514. your changes. Closes ticket 22636.
  13515. o Major bugfixes (linux TPROXY support, backport from 0.3.1.1-alpha):
  13516. - Fix a typo that had prevented TPROXY-based transparent proxying
  13517. from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
  13518. Patch from "d4fq0fQAgoJ".
  13519. o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
  13520. - Avoid an assertion failure bug affecting our implementation of
  13521. inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
  13522. handling of "0xbar" differs from what we had expected. Fixes bug
  13523. 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
  13524. o Minor features (backport from 0.3.1.5-alpha):
  13525. - Update geoip and geoip6 to the July 4 2017 Maxmind GeoLite2
  13526. Country database.
  13527. o Minor bugfixes (bandwidth accounting, backport from 0.3.1.2-alpha):
  13528. - Roll over monthly accounting at the configured hour and minute,
  13529. rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1.
  13530. Found by Andrey Karpov with PVS-Studio.
  13531. o Minor bugfixes (compilation warnings, backport from 0.3.1.5-alpha):
  13532. - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug 22915;
  13533. bugfix on 0.2.8.1-alpha.
  13534. - Fix warnings when building with libscrypt and openssl scrypt
  13535. support on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha.
  13536. - When building with certain versions of the mingw C header files,
  13537. avoid float-conversion warnings when calling the C functions
  13538. isfinite(), isnan(), and signbit(). Fixes bug 22801; bugfix
  13539. on 0.2.8.1-alpha.
  13540. o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha):
  13541. - Backport a fix for an "unused variable" warning that appeared
  13542. in some versions of mingw. Fixes bug 22838; bugfix on
  13543. 0.2.8.1-alpha.
  13544. o Minor bugfixes (coverity build support, backport from 0.3.1.5-alpha):
  13545. - Avoid Coverity build warnings related to our BUG() macro. By
  13546. default, Coverity treats BUG() as the Linux kernel does: an
  13547. instant abort(). We need to override that so our BUG() macro
  13548. doesn't prevent Coverity from analyzing functions that use it.
  13549. Fixes bug 23030; bugfix on 0.2.9.1-alpha.
  13550. o Minor bugfixes (directory authority, backport from 0.3.1.1-alpha):
  13551. - When rejecting a router descriptor for running an obsolete version
  13552. of Tor without ntor support, warn about the obsolete tor version,
  13553. not the missing ntor key. Fixes bug 20270; bugfix on 0.2.9.3-alpha.
  13554. o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.5-alpha):
  13555. - Avoid a sandbox failure when trying to re-bind to a socket and
  13556. mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha.
  13557. o Minor bugfixes (unit tests, backport from 0.3.1.5-alpha)
  13558. - Fix a memory leak in the link-handshake/certs_ok_ed25519 test.
  13559. Fixes bug 22803; bugfix on 0.3.0.1-alpha.
  13560. Changes in version 0.3.1.5-alpha - 2017-08-01
  13561. Tor 0.3.1.5-alpha improves the performance of consensus diff
  13562. calculation, fixes a crash bug on older versions of OpenBSD, and fixes
  13563. several other bugs. If no serious bugs are found in this version, the
  13564. next version will be a release candidate.
  13565. This release also marks the end of support for the Tor 0.2.4.x,
  13566. 0.2.6.x, and 0.2.7.x release series. Those releases will receive no
  13567. further bug or security fixes. Anyone still running or distributing
  13568. one of those versions should upgrade.
  13569. o Major features (build system, continuous integration):
  13570. - Tor's repository now includes a Travis Continuous Integration (CI)
  13571. configuration file (.travis.yml). This is meant to help new
  13572. developers and contributors who fork Tor to a Github repository be
  13573. better able to test their changes, and understand what we expect
  13574. to pass. To use this new build feature, you must fork Tor to your
  13575. Github account, then go into the "Integrations" menu in the
  13576. repository settings for your fork and enable Travis, then push
  13577. your changes. Closes ticket 22636.
  13578. o Major bugfixes (openbsd, denial-of-service):
  13579. - Avoid an assertion failure bug affecting our implementation of
  13580. inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
  13581. handling of "0xbar" differs from what we had expected. Fixes bug
  13582. 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
  13583. o Major bugfixes (relay, performance):
  13584. - Perform circuit handshake operations at a higher priority than we
  13585. use for consensus diff creation and compression. This should
  13586. prevent circuits from starving when a relay or bridge receives a
  13587. new consensus, especially on lower-powered machines. Fixes bug
  13588. 22883; bugfix on 0.3.1.1-alpha.
  13589. o Minor features (bridge authority):
  13590. - Add "fingerprint" lines to the networkstatus-bridges file produced
  13591. by bridge authorities. Closes ticket 22207.
  13592. o Minor features (directory cache, consensus diff):
  13593. - Add a new MaxConsensusAgeForDiffs option to allow directory cache
  13594. operators with low-resource environments to adjust the number of
  13595. consensuses they'll store and generate diffs from. Most cache
  13596. operators should leave it unchanged. Helps to work around
  13597. bug 22883.
  13598. o Minor features (geoip):
  13599. - Update geoip and geoip6 to the July 4 2017 Maxmind GeoLite2
  13600. Country database.
  13601. o Minor features (relay, performance):
  13602. - Always start relays with at least two worker threads, to prevent
  13603. priority inversion on slow tasks. Part of the fix for bug 22883.
  13604. - Allow background work to be queued with different priorities, so
  13605. that a big pile of slow low-priority jobs will not starve out
  13606. higher priority jobs. This lays the groundwork for a fix for
  13607. bug 22883.
  13608. o Minor bugfixes (build system, rust):
  13609. - Fix a problem where Rust toolchains were not being found when
  13610. building without --enable-cargo-online-mode, due to setting the
  13611. $HOME environment variable instead of $CARGO_HOME. Fixes bug
  13612. 22830; bugfix on 0.3.1.1-alpha. Fix by Chelsea Komlo.
  13613. o Minor bugfixes (compatibility, zstd):
  13614. - Write zstd epilogues correctly when the epilogue requires
  13615. reallocation of the output buffer, even with zstd 1.3.0.
  13616. (Previously, we worked on 1.2.0 and failed with 1.3.0). Fixes bug
  13617. 22927; bugfix on 0.3.1.1-alpha.
  13618. o Minor bugfixes (compilation warnings):
  13619. - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug
  13620. 22915; bugfix on 0.2.8.1-alpha.
  13621. - Fix warnings when building with libscrypt and openssl scrypt
  13622. support on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha.
  13623. - Compile correctly when both openssl 1.1.0 and libscrypt are
  13624. detected. Previously this would cause an error. Fixes bug 22892;
  13625. bugfix on 0.3.1.1-alpha.
  13626. - When building with certain versions of the mingw C header files,
  13627. avoid float-conversion warnings when calling the C functions
  13628. isfinite(), isnan(), and signbit(). Fixes bug 22801; bugfix
  13629. on 0.2.8.1-alpha.
  13630. o Minor bugfixes (coverity build support):
  13631. - Avoid Coverity build warnings related to our BUG() macro. By
  13632. default, Coverity treats BUG() as the Linux kernel does: an
  13633. instant abort(). We need to override that so our BUG() macro
  13634. doesn't prevent Coverity from analyzing functions that use it.
  13635. Fixes bug 23030; bugfix on 0.2.9.1-alpha.
  13636. o Minor bugfixes (directory authority):
  13637. - When a directory authority rejects a descriptor or extrainfo with
  13638. a given digest, mark that digest as undownloadable, so that we do
  13639. not attempt to download it again over and over. We previously
  13640. tried to avoid downloading such descriptors by other means, but we
  13641. didn't notice if we accidentally downloaded one anyway. This
  13642. behavior became problematic in 0.2.7.2-alpha, when authorities
  13643. began pinning Ed25519 keys. Fixes bug 22349; bugfix
  13644. on 0.2.1.19-alpha.
  13645. o Minor bugfixes (error reporting, windows):
  13646. - When formatting Windows error messages, use the English format to
  13647. avoid codepage issues. Fixes bug 22520; bugfix on 0.1.2.8-alpha.
  13648. Patch from "Vort".
  13649. o Minor bugfixes (file limits, osx):
  13650. - When setting the maximum number of connections allowed by the OS,
  13651. always allow some extra file descriptors for other files. Fixes
  13652. bug 22797; bugfix on 0.2.0.10-alpha.
  13653. o Minor bugfixes (linux seccomp2 sandbox):
  13654. - Avoid a sandbox failure when trying to re-bind to a socket and
  13655. mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha.
  13656. o Minor bugfixes (memory leaks):
  13657. - Fix a small memory leak when validating a configuration that uses
  13658. two or more AF_UNIX sockets for the same port type. Fixes bug
  13659. 23053; bugfix on 0.2.6.3-alpha. This is CID 1415725.
  13660. o Minor bugfixes (unit tests):
  13661. - test_consdiff_base64cmp would fail on OS X because while OS X
  13662. follows the standard of (less than zero/zero/greater than zero),
  13663. it doesn't follow the convention of (-1/0/+1). Make the test
  13664. comply with the standard. Fixes bug 22870; bugfix on 0.3.1.1-alpha.
  13665. - Fix a memory leak in the link-handshake/certs_ok_ed25519 test.
  13666. Fixes bug 22803; bugfix on 0.3.0.1-alpha.
  13667. Changes in version 0.3.1.4-alpha - 2017-06-29
  13668. Tor 0.3.1.4-alpha fixes a path selection bug that would allow a client
  13669. to use a guard that was in the same network family as a chosen exit
  13670. relay. This is a security regression; all clients running earlier
  13671. versions of 0.3.0.x or 0.3.1.x should upgrade to 0.3.0.9
  13672. or 0.3.1.4-alpha.
  13673. This release also fixes several other bugs introduced in 0.3.0.x
  13674. and 0.3.1.x, including others that can affect bandwidth usage
  13675. and correctness.
  13676. o New dependencies:
  13677. - To build with zstd and lzma support, Tor now requires the
  13678. pkg-config tool at build time. (This requirement was new in
  13679. 0.3.1.1-alpha, but was not noted at the time. Noting it here to
  13680. close ticket 22623.)
  13681. o Major bugfixes (path selection, security):
  13682. - When choosing which guard to use for a circuit, avoid the exit's
  13683. family along with the exit itself. Previously, the new guard
  13684. selection logic avoided the exit, but did not consider its family.
  13685. Fixes bug 22753; bugfix on 0.3.0.1-alpha. Tracked as TROVE-2017-
  13686. 006 and CVE-2017-0377.
  13687. o Major bugfixes (compression, zstd):
  13688. - Correctly detect a full buffer when decompressing a large zstd-
  13689. compressed input. Previously, we would sometimes treat a full
  13690. buffer as an error. Fixes bug 22628; bugfix on 0.3.1.1-alpha.
  13691. o Major bugfixes (directory protocol):
  13692. - Ensure that we send "304 Not modified" as HTTP status code when a
  13693. client is attempting to fetch a consensus or consensus diff, and
  13694. the best one we can send them is one they already have. Fixes bug
  13695. 22702; bugfix on 0.3.1.1-alpha.
  13696. o Major bugfixes (entry guards):
  13697. - When starting with an old consensus, do not add new entry guards
  13698. unless the consensus is "reasonably live" (under 1 day old). Fixes
  13699. one root cause of bug 22400; bugfix on 0.3.0.1-alpha.
  13700. o Minor features (bug mitigation, diagnostics, logging):
  13701. - Avoid an assertion failure, and log a better error message, when
  13702. unable to remove a file from the consensus cache on Windows.
  13703. Attempts to mitigate and diagnose bug 22752.
  13704. o Minor features (geoip):
  13705. - Update geoip and geoip6 to the June 8 2017 Maxmind GeoLite2
  13706. Country database.
  13707. o Minor bugfixes (compression):
  13708. - When compressing or decompressing a buffer, check for a failure to
  13709. create a compression object. Fixes bug 22626; bugfix
  13710. on 0.3.1.1-alpha.
  13711. - When decompressing a buffer, check for extra data after the end of
  13712. the compressed data. Fixes bug 22629; bugfix on 0.3.1.1-alpha.
  13713. - When decompressing an object received over an anonymous directory
  13714. connection, if we have already decompressed it using an acceptable
  13715. compression method, do not reject it for looking like an
  13716. unacceptable compression method. Fixes part of bug 22670; bugfix
  13717. on 0.3.1.1-alpha.
  13718. - When serving directory votes compressed with zlib, do not claim to
  13719. have compressed them with zstd. Fixes bug 22669; bugfix
  13720. on 0.3.1.1-alpha.
  13721. - When spooling compressed data to an output buffer, don't try to
  13722. spool more data when there is no more data to spool and we are not
  13723. trying to flush the input. Previously, we would sometimes launch
  13724. compression requests with nothing to do, which interferes with our
  13725. 22672 checks. Fixes bug 22719; bugfix on 0.2.0.16-alpha.
  13726. o Minor bugfixes (defensive programming):
  13727. - Detect and break out of infinite loops in our compression code. We
  13728. don't think that any such loops exist now, but it's best to be
  13729. safe. Closes ticket 22672.
  13730. - Fix a memset() off the end of an array when packing cells. This
  13731. bug should be harmless in practice, since the corrupted bytes are
  13732. still in the same structure, and are always padding bytes,
  13733. ignored, or immediately overwritten, depending on compiler
  13734. behavior. Nevertheless, because the memset()'s purpose is to make
  13735. sure that any other cell-handling bugs can't expose bytes to the
  13736. network, we need to fix it. Fixes bug 22737; bugfix on
  13737. 0.2.4.11-alpha. Fixes CID 1401591.
  13738. o Minor bugfixes (linux seccomp2 sandbox):
  13739. - Permit the fchmod system call, to avoid crashing on startup when
  13740. starting with the seccomp2 sandbox and an unexpected set of
  13741. permissions on the data directory or its contents. Fixes bug
  13742. 22516; bugfix on 0.2.5.4-alpha.
  13743. - Fix a crash in the LZMA module, when the sandbox was enabled, and
  13744. liblzma would allocate more than 16 MB of memory. We solve this by
  13745. bumping the mprotect() limit in the sandbox module from 16 MB to
  13746. 20 MB. Fixes bug 22751; bugfix on 0.3.1.1-alpha.
  13747. o Minor bugfixes (logging):
  13748. - When decompressing, do not warn if we fail to decompress using a
  13749. compression method that we merely guessed. Fixes part of bug
  13750. 22670; bugfix on 0.1.1.14-alpha.
  13751. - When decompressing, treat mismatch between content-encoding and
  13752. actual compression type as a protocol warning. Fixes part of bug
  13753. 22670; bugfix on 0.1.1.9-alpha.
  13754. - Downgrade "assigned_to_cpuworker failed" message to info-level
  13755. severity. In every case that can reach it, either a better warning
  13756. has already been logged, or no warning is warranted. Fixes bug
  13757. 22356; bugfix on 0.2.6.3-alpha.
  13758. - Demote a warn that was caused by libevent delays to info if
  13759. netflow padding is less than 4.5 seconds late, or to notice
  13760. if it is more (4.5 seconds is the amount of time that a netflow
  13761. record might be emitted after, if we chose the maximum timeout).
  13762. Fixes bug 22212; bugfix on 0.3.1.1-alpha.
  13763. o Minor bugfixes (process behavior):
  13764. - When exiting because of an error, always exit with a nonzero exit
  13765. status. Previously, we would fail to report an error in our exit
  13766. status in cases related to __OwningControllerProcess failure,
  13767. lockfile contention, and Ed25519 key initialization. Fixes bug
  13768. 22720; bugfix on versions 0.2.1.6-alpha, 0.2.2.28-beta, and
  13769. 0.2.7.2-alpha respectively. Reported by "f55jwk4f"; patch
  13770. from "huyvq".
  13771. o Documentation:
  13772. - Add a manpage description for the key-pinning-journal file. Closes
  13773. ticket 22347.
  13774. - Correctly note that bandwidth accounting values are stored in the
  13775. state file, and the bw_accounting file is now obsolete. Closes
  13776. ticket 16082.
  13777. - Document more of the files in the Tor data directory, including
  13778. cached-extrainfo, secret_onion_key{,_ntor}.old, hidserv-stats,
  13779. approved-routers, sr-random, and diff-cache. Found while fixing
  13780. ticket 22347.
  13781. Changes in version 0.3.0.9 - 2017-06-29
  13782. Tor 0.3.0.9 fixes a path selection bug that would allow a client
  13783. to use a guard that was in the same network family as a chosen exit
  13784. relay. This is a security regression; all clients running earlier
  13785. versions of 0.3.0.x or 0.3.1.x should upgrade to 0.3.0.9 or
  13786. 0.3.1.4-alpha.
  13787. This release also backports several other bugfixes from the 0.3.1.x
  13788. series.
  13789. o Major bugfixes (path selection, security, backport from 0.3.1.4-alpha):
  13790. - When choosing which guard to use for a circuit, avoid the exit's
  13791. family along with the exit itself. Previously, the new guard
  13792. selection logic avoided the exit, but did not consider its family.
  13793. Fixes bug 22753; bugfix on 0.3.0.1-alpha. Tracked as TROVE-2017-
  13794. 006 and CVE-2017-0377.
  13795. o Major bugfixes (entry guards, backport from 0.3.1.1-alpha):
  13796. - Don't block bootstrapping when a primary bridge is offline and we
  13797. can't get its descriptor. Fixes bug 22325; fixes one case of bug
  13798. 21969; bugfix on 0.3.0.3-alpha.
  13799. o Major bugfixes (entry guards, backport from 0.3.1.4-alpha):
  13800. - When starting with an old consensus, do not add new entry guards
  13801. unless the consensus is "reasonably live" (under 1 day old). Fixes
  13802. one root cause of bug 22400; bugfix on 0.3.0.1-alpha.
  13803. o Minor features (geoip):
  13804. - Update geoip and geoip6 to the June 8 2017 Maxmind GeoLite2
  13805. Country database.
  13806. o Minor bugfixes (voting consistency, backport from 0.3.1.1-alpha):
  13807. - Reject version numbers with non-numeric prefixes (such as +, -, or
  13808. whitespace). Disallowing whitespace prevents differential version
  13809. parsing between POSIX-based and Windows platforms. Fixes bug 21507
  13810. and part of 21508; bugfix on 0.0.8pre1.
  13811. o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.4-alpha):
  13812. - Permit the fchmod system call, to avoid crashing on startup when
  13813. starting with the seccomp2 sandbox and an unexpected set of
  13814. permissions on the data directory or its contents. Fixes bug
  13815. 22516; bugfix on 0.2.5.4-alpha.
  13816. o Minor bugfixes (defensive programming, backport from 0.3.1.4-alpha):
  13817. - Fix a memset() off the end of an array when packing cells. This
  13818. bug should be harmless in practice, since the corrupted bytes are
  13819. still in the same structure, and are always padding bytes,
  13820. ignored, or immediately overwritten, depending on compiler
  13821. behavior. Nevertheless, because the memset()'s purpose is to make
  13822. sure that any other cell-handling bugs can't expose bytes to the
  13823. network, we need to fix it. Fixes bug 22737; bugfix on
  13824. 0.2.4.11-alpha. Fixes CID 1401591.
  13825. Changes in version 0.3.1.3-alpha - 2017-06-08
  13826. Tor 0.3.1.3-alpha fixes a pair of bugs that would allow an attacker to
  13827. remotely crash a hidden service with an assertion failure. Anyone
  13828. running a hidden service should upgrade to this version, or to some
  13829. other version with fixes for TROVE-2017-004 and TROVE-2017-005.
  13830. Tor 0.3.1.3-alpha also includes fixes for several key management bugs
  13831. that sometimes made relays unreliable, as well as several other
  13832. bugfixes described below.
  13833. o Major bugfixes (hidden service, relay, security):
  13834. - Fix a remotely triggerable assertion failure when a hidden service
  13835. handles a malformed BEGIN cell. Fixes bug 22493, tracked as
  13836. TROVE-2017-004 and as CVE-2017-0375; bugfix on 0.3.0.1-alpha.
  13837. - Fix a remotely triggerable assertion failure caused by receiving a
  13838. BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
  13839. 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
  13840. on 0.2.2.1-alpha.
  13841. o Major bugfixes (relay, link handshake):
  13842. - When performing the v3 link handshake on a TLS connection, report
  13843. that we have the x509 certificate that we actually used on that
  13844. connection, even if we have changed certificates since that
  13845. connection was first opened. Previously, we would claim to have
  13846. used our most recent x509 link certificate, which would sometimes
  13847. make the link handshake fail. Fixes one case of bug 22460; bugfix
  13848. on 0.2.3.6-alpha.
  13849. o Major bugfixes (relays, key management):
  13850. - Regenerate link and authentication certificates whenever the key
  13851. that signs them changes; also, regenerate link certificates
  13852. whenever the signed key changes. Previously, these processes were
  13853. only weakly coupled, and we relays could (for minutes to hours)
  13854. wind up with an inconsistent set of keys and certificates, which
  13855. other relays would not accept. Fixes two cases of bug 22460;
  13856. bugfix on 0.3.0.1-alpha.
  13857. - When sending an Ed25519 signing->link certificate in a CERTS cell,
  13858. send the certificate that matches the x509 certificate that we
  13859. used on the TLS connection. Previously, there was a race condition
  13860. if the TLS context rotated after we began the TLS handshake but
  13861. before we sent the CERTS cell. Fixes a case of bug 22460; bugfix
  13862. on 0.3.0.1-alpha.
  13863. o Major bugfixes (torrc, crash):
  13864. - Fix a crash bug when using %include in torrc. Fixes bug 22417;
  13865. bugfix on 0.3.1.1-alpha. Patch by Daniel Pinto.
  13866. o Minor features (code style):
  13867. - Add "Falls through" comments to our codebase, in order to silence
  13868. GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas
  13869. Stieger. Closes ticket 22446.
  13870. o Minor features (diagnostic):
  13871. - Add logging messages to try to diagnose a rare bug that seems to
  13872. generate RSA->Ed25519 cross-certificates dated in the 1970s. We
  13873. think this is happening because of incorrect system clocks, but
  13874. we'd like to know for certain. Diagnostic for bug 22466.
  13875. o Minor bugfixes (correctness):
  13876. - Avoid undefined behavior when parsing IPv6 entries from the geoip6
  13877. file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
  13878. o Minor bugfixes (directory protocol):
  13879. - Check for libzstd >= 1.1, because older versions lack the
  13880. necessary streaming API. Fixes bug 22413; bugfix on 0.3.1.1-alpha.
  13881. o Minor bugfixes (link handshake):
  13882. - Lower the lifetime of the RSA->Ed25519 cross-certificate to six
  13883. months, and regenerate it when it is within one month of expiring.
  13884. Previously, we had generated this certificate at startup with a
  13885. ten-year lifetime, but that could lead to weird behavior when Tor
  13886. was started with a grossly inaccurate clock. Mitigates bug 22466;
  13887. mitigation on 0.3.0.1-alpha.
  13888. o Minor bugfixes (storage directories):
  13889. - Always check for underflows in the cached storage directory usage.
  13890. If the usage does underflow, re-calculate it. Also, avoid a
  13891. separate underflow when the usage is not known. Fixes bug 22424;
  13892. bugfix on 0.3.1.1-alpha.
  13893. o Minor bugfixes (unit tests):
  13894. - The unit tests now pass on systems where localhost is misconfigured
  13895. to some IPv4 address other than 127.0.0.1. Fixes bug 6298; bugfix
  13896. on 0.0.9pre2.
  13897. o Documentation:
  13898. - Clarify the manpage for the (deprecated) torify script. Closes
  13899. ticket 6892.
  13900. Changes in version 0.3.0.8 - 2017-06-08
  13901. Tor 0.3.0.8 fixes a pair of bugs that would allow an attacker to
  13902. remotely crash a hidden service with an assertion failure. Anyone
  13903. running a hidden service should upgrade to this version, or to some
  13904. other version with fixes for TROVE-2017-004 and TROVE-2017-005.
  13905. Tor 0.3.0.8 also includes fixes for several key management bugs
  13906. that sometimes made relays unreliable, as well as several other
  13907. bugfixes described below.
  13908. o Major bugfixes (hidden service, relay, security, backport
  13909. from 0.3.1.3-alpha):
  13910. - Fix a remotely triggerable assertion failure when a hidden service
  13911. handles a malformed BEGIN cell. Fixes bug 22493, tracked as
  13912. TROVE-2017-004 and as CVE-2017-0375; bugfix on 0.3.0.1-alpha.
  13913. - Fix a remotely triggerable assertion failure caused by receiving a
  13914. BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
  13915. 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
  13916. on 0.2.2.1-alpha.
  13917. o Major bugfixes (relay, link handshake, backport from 0.3.1.3-alpha):
  13918. - When performing the v3 link handshake on a TLS connection, report
  13919. that we have the x509 certificate that we actually used on that
  13920. connection, even if we have changed certificates since that
  13921. connection was first opened. Previously, we would claim to have
  13922. used our most recent x509 link certificate, which would sometimes
  13923. make the link handshake fail. Fixes one case of bug 22460; bugfix
  13924. on 0.2.3.6-alpha.
  13925. o Major bugfixes (relays, key management, backport from 0.3.1.3-alpha):
  13926. - Regenerate link and authentication certificates whenever the key
  13927. that signs them changes; also, regenerate link certificates
  13928. whenever the signed key changes. Previously, these processes were
  13929. only weakly coupled, and we relays could (for minutes to hours)
  13930. wind up with an inconsistent set of keys and certificates, which
  13931. other relays would not accept. Fixes two cases of bug 22460;
  13932. bugfix on 0.3.0.1-alpha.
  13933. - When sending an Ed25519 signing->link certificate in a CERTS cell,
  13934. send the certificate that matches the x509 certificate that we
  13935. used on the TLS connection. Previously, there was a race condition
  13936. if the TLS context rotated after we began the TLS handshake but
  13937. before we sent the CERTS cell. Fixes a case of bug 22460; bugfix
  13938. on 0.3.0.1-alpha.
  13939. o Major bugfixes (hidden service v3, backport from 0.3.1.1-alpha):
  13940. - Stop rejecting v3 hidden service descriptors because their size
  13941. did not match an old padding rule. Fixes bug 22447; bugfix on
  13942. 0.3.0.1-alpha.
  13943. o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
  13944. - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
  13945. December 2016 (of which ~126 were still functional) with a list of
  13946. 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
  13947. 2017. Resolves ticket 21564.
  13948. o Minor bugfixes (configuration, backport from 0.3.1.1-alpha):
  13949. - Do not crash when starting with LearnCircuitBuildTimeout 0. Fixes
  13950. bug 22252; bugfix on 0.2.9.3-alpha.
  13951. o Minor bugfixes (correctness, backport from 0.3.1.3-alpha):
  13952. - Avoid undefined behavior when parsing IPv6 entries from the geoip6
  13953. file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
  13954. o Minor bugfixes (link handshake, backport from 0.3.1.3-alpha):
  13955. - Lower the lifetime of the RSA->Ed25519 cross-certificate to six
  13956. months, and regenerate it when it is within one month of expiring.
  13957. Previously, we had generated this certificate at startup with a
  13958. ten-year lifetime, but that could lead to weird behavior when Tor
  13959. was started with a grossly inaccurate clock. Mitigates bug 22466;
  13960. mitigation on 0.3.0.1-alpha.
  13961. o Minor bugfixes (memory leak, directory authority, backport from
  13962. 0.3.1.2-alpha):
  13963. - When directory authorities reject a router descriptor due to
  13964. keypinning, free the router descriptor rather than leaking the
  13965. memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
  13966. Changes in version 0.2.9.11 - 2017-06-08
  13967. Tor 0.2.9.11 backports a fix for a bug that would allow an attacker to
  13968. remotely crash a hidden service with an assertion failure. Anyone
  13969. running a hidden service should upgrade to this version, or to some
  13970. other version with fixes for TROVE-2017-005. (Versions before 0.3.0
  13971. are not affected by TROVE-2017-004.)
  13972. Tor 0.2.9.11 also backports fixes for several key management bugs
  13973. that sometimes made relays unreliable, as well as several other
  13974. bugfixes described below.
  13975. o Major bugfixes (hidden service, relay, security, backport
  13976. from 0.3.1.3-alpha):
  13977. - Fix a remotely triggerable assertion failure caused by receiving a
  13978. BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
  13979. 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
  13980. on 0.2.2.1-alpha.
  13981. o Major bugfixes (relay, link handshake, backport from 0.3.1.3-alpha):
  13982. - When performing the v3 link handshake on a TLS connection, report
  13983. that we have the x509 certificate that we actually used on that
  13984. connection, even if we have changed certificates since that
  13985. connection was first opened. Previously, we would claim to have
  13986. used our most recent x509 link certificate, which would sometimes
  13987. make the link handshake fail. Fixes one case of bug 22460; bugfix
  13988. on 0.2.3.6-alpha.
  13989. o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
  13990. - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
  13991. December 2016 (of which ~126 were still functional) with a list of
  13992. 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
  13993. 2017. Resolves ticket 21564.
  13994. o Minor features (future-proofing, backport from 0.3.0.7):
  13995. - Tor no longer refuses to download microdescriptors or descriptors if
  13996. they are listed as "published in the future". This change will
  13997. eventually allow us to stop listing meaningful "published" dates
  13998. in microdescriptor consensuses, and thereby allow us to reduce the
  13999. resources required to download consensus diffs by over 50%.
  14000. Implements part of ticket 21642; implements part of proposal 275.
  14001. o Minor features (directory authorities, backport from 0.3.0.4-rc)
  14002. - Directory authorities now reject relays running versions
  14003. 0.2.9.1-alpha through 0.2.9.4-alpha, because those relays
  14004. suffer from bug 20499 and don't keep their consensus cache
  14005. up-to-date. Resolves ticket 20509.
  14006. o Minor features (geoip):
  14007. - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
  14008. Country database.
  14009. o Minor bugfixes (control port, backport from 0.3.0.6):
  14010. - The GETINFO extra-info/digest/<digest> command was broken because
  14011. of a wrong base16 decode return value check, introduced when
  14012. refactoring that API. Fixes bug 22034; bugfix on 0.2.9.1-alpha.
  14013. o Minor bugfixes (correctness, backport from 0.3.1.3-alpha):
  14014. - Avoid undefined behavior when parsing IPv6 entries from the geoip6
  14015. file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
  14016. o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.0.7):
  14017. - The getpid() system call is now permitted under the Linux seccomp2
  14018. sandbox, to avoid crashing with versions of OpenSSL (and other
  14019. libraries) that attempt to learn the process's PID by using the
  14020. syscall rather than the VDSO code. Fixes bug 21943; bugfix
  14021. on 0.2.5.1-alpha.
  14022. o Minor bugfixes (memory leak, directory authority, backport
  14023. from 0.3.1.2-alpha):
  14024. - When directory authorities reject a router descriptor due to
  14025. keypinning, free the router descriptor rather than leaking the
  14026. memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
  14027. Changes in version 0.2.8.14 - 2017-06-08
  14028. Tor 0.2.7.8 backports a fix for a bug that would allow an attacker to
  14029. remotely crash a hidden service with an assertion failure. Anyone
  14030. running a hidden service should upgrade to this version, or to some
  14031. other version with fixes for TROVE-2017-005. (Versions before 0.3.0
  14032. are not affected by TROVE-2017-004.)
  14033. o Major bugfixes (hidden service, relay, security):
  14034. - Fix a remotely triggerable assertion failure caused by receiving a
  14035. BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
  14036. 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
  14037. on 0.2.2.1-alpha.
  14038. o Minor features (geoip):
  14039. - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
  14040. Country database.
  14041. o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
  14042. - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
  14043. December 2016 (of which ~126 were still functional) with a list of
  14044. 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
  14045. 2017. Resolves ticket 21564.
  14046. o Minor bugfixes (correctness):
  14047. - Avoid undefined behavior when parsing IPv6 entries from the geoip6
  14048. file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
  14049. Changes in version 0.2.7.8 - 2017-06-08
  14050. Tor 0.2.7.8 backports a fix for a bug that would allow an attacker to
  14051. remotely crash a hidden service with an assertion failure. Anyone
  14052. running a hidden service should upgrade to this version, or to some
  14053. other version with fixes for TROVE-2017-005. (Versions before 0.3.0
  14054. are not affected by TROVE-2017-004.)
  14055. o Major bugfixes (hidden service, relay, security):
  14056. - Fix a remotely triggerable assertion failure caused by receiving a
  14057. BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
  14058. 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
  14059. on 0.2.2.1-alpha.
  14060. o Minor features (geoip):
  14061. - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
  14062. Country database.
  14063. o Minor bugfixes (correctness):
  14064. - Avoid undefined behavior when parsing IPv6 entries from the geoip6
  14065. file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
  14066. Changes in version 0.2.6.12 - 2017-06-08
  14067. Tor 0.2.6.12 backports a fix for a bug that would allow an attacker to
  14068. remotely crash a hidden service with an assertion failure. Anyone
  14069. running a hidden service should upgrade to this version, or to some
  14070. other version with fixes for TROVE-2017-005. (Versions before 0.3.0
  14071. are not affected by TROVE-2017-004.)
  14072. o Major bugfixes (hidden service, relay, security):
  14073. - Fix a remotely triggerable assertion failure caused by receiving a
  14074. BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
  14075. 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
  14076. on 0.2.2.1-alpha.
  14077. o Minor features (geoip):
  14078. - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
  14079. Country database.
  14080. o Minor bugfixes (correctness):
  14081. - Avoid undefined behavior when parsing IPv6 entries from the geoip6
  14082. file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
  14083. Changes in version 0.2.5.14 - 2017-06-08
  14084. Tor 0.2.5.14 backports a fix for a bug that would allow an attacker to
  14085. remotely crash a hidden service with an assertion failure. Anyone
  14086. running a hidden service should upgrade to this version, or to some
  14087. other version with fixes for TROVE-2017-005. (Versions before 0.3.0
  14088. are not affected by TROVE-2017-004.)
  14089. o Major bugfixes (hidden service, relay, security):
  14090. - Fix a remotely triggerable assertion failure caused by receiving a
  14091. BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
  14092. 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
  14093. on 0.2.2.1-alpha.
  14094. o Minor features (geoip):
  14095. - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
  14096. Country database.
  14097. o Minor bugfixes (correctness):
  14098. - Avoid undefined behavior when parsing IPv6 entries from the geoip6
  14099. file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
  14100. Changes in version 0.2.4.29 - 2017-06-08
  14101. Tor 0.2.4.29 backports a fix for a bug that would allow an attacker to
  14102. remotely crash a hidden service with an assertion failure. Anyone
  14103. running a hidden service should upgrade to this version, or to some
  14104. other version with fixes for TROVE-2017-005. (Versions before 0.3.0
  14105. are not affected by TROVE-2017-004.)
  14106. o Major bugfixes (hidden service, relay, security):
  14107. - Fix a remotely triggerable assertion failure caused by receiving a
  14108. BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
  14109. 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
  14110. on 0.2.2.1-alpha.
  14111. o Minor features (geoip):
  14112. - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
  14113. Country database.
  14114. o Minor bugfixes (correctness):
  14115. - Avoid undefined behavior when parsing IPv6 entries from the geoip6
  14116. file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
  14117. Changes in version 0.3.1.2-alpha - 2017-05-26
  14118. Tor 0.3.1.2-alpha is the second release in the 0.3.1.x series. It
  14119. fixes a few bugs found while testing 0.3.1.1-alpha, including a
  14120. memory corruption bug that affected relay stability.
  14121. o Major bugfixes (crash, relay):
  14122. - Fix a memory-corruption bug in relays that set MyFamily.
  14123. Previously, they would double-free MyFamily elements when making
  14124. the next descriptor or when changing their configuration. Fixes
  14125. bug 22368; bugfix on 0.3.1.1-alpha.
  14126. o Minor bugfixes (logging):
  14127. - Log a better message when a directory authority replies to an
  14128. upload with an unexpected status code. Fixes bug 11121; bugfix
  14129. on 0.1.0.1-rc.
  14130. o Minor bugfixes (memory leak, directory authority):
  14131. - When directory authorities reject a router descriptor due to
  14132. keypinning, free the router descriptor rather than leaking the
  14133. memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
  14134. Changes in version 0.3.1.1-alpha - 2017-05-22
  14135. Tor 0.3.1.1-alpha is the first release in the 0.3.1.x series. It
  14136. reduces the bandwidth usage for Tor's directory protocol, adds some
  14137. basic padding to resist netflow-based traffic analysis and to serve as
  14138. the basis of other padding in the future, and adds rust support to the
  14139. build system.
  14140. It also contains numerous other small features and improvements to
  14141. security, correctness, and performance.
  14142. Below are the changes since 0.3.0.7.
  14143. o Major features (directory protocol):
  14144. - Tor relays and authorities can now serve clients an abbreviated
  14145. version of the consensus document, containing only the changes
  14146. since an older consensus document that the client holds. Clients
  14147. now request these documents when available. When both client and
  14148. server use this new protocol, they will use far less bandwidth (up
  14149. to 94% less) to keep the client's consensus up-to-date. Implements
  14150. proposal 140; closes ticket 13339. Based on work by Daniel Martí.
  14151. - Tor can now compress directory traffic with lzma or with zstd
  14152. compression algorithms, which can deliver better bandwidth
  14153. performance. Because lzma is computationally expensive, it's only
  14154. used for documents that can be compressed once and served many
  14155. times. Support for these algorithms requires that tor is built
  14156. with the libzstd and/or liblzma libraries available. Implements
  14157. proposal 278; closes ticket 21662.
  14158. - Relays now perform the more expensive compression operations, and
  14159. consensus diff generation, in worker threads. This separation
  14160. avoids delaying the main thread when a new consensus arrives.
  14161. o Major features (experimental):
  14162. - Tor can now build modules written in Rust. To turn this on, pass
  14163. the "--enable-rust" flag to the configure script. It's not time to
  14164. get excited yet: currently, there is no actual Rust functionality
  14165. beyond some simple glue code, and a notice at startup to tell you
  14166. that Rust is running. Still, we hope that programmers and
  14167. packagers will try building Tor with Rust support, so that we can
  14168. find issues and solve portability problems. Closes ticket 22106.
  14169. o Major features (traffic analysis resistance):
  14170. - Connections between clients and relays now send a padding cell in
  14171. each direction every 1.5 to 9.5 seconds (tunable via consensus
  14172. parameters). This padding will not resist specialized
  14173. eavesdroppers, but it should be enough to make many ISPs' routine
  14174. network flow logging less useful in traffic analysis against
  14175. Tor users.
  14176. Padding is negotiated using Tor's link protocol, so both relays
  14177. and clients must upgrade for this to take effect. Clients may
  14178. still send padding despite the relay's version by setting
  14179. ConnectionPadding 1 in torrc, and may disable padding by setting
  14180. ConnectionPadding 0 in torrc. Padding may be minimized for mobile
  14181. users with the torrc option ReducedConnectionPadding. Implements
  14182. Proposal 251 and Section 2 of Proposal 254; closes ticket 16861.
  14183. - Relays will publish 24 hour totals of padding and non-padding cell
  14184. counts to their extra-info descriptors, unless PaddingStatistics 0
  14185. is set in torrc. These 24 hour totals are also rounded to
  14186. multiples of 10000.
  14187. o Major bugfixes (connection usage):
  14188. - We use NETINFO cells to try to determine if both relays involved
  14189. in a connection will agree on the canonical status of that
  14190. connection. We prefer the connections where this is the case for
  14191. extend cells, and try to close connections where relays disagree
  14192. on their canonical status early. Also, we now prefer the oldest
  14193. valid connection for extend cells. These two changes should reduce
  14194. the number of long-term connections that are kept open between
  14195. relays. Fixes bug 17604; bugfix on 0.2.5.5-alpha.
  14196. - Relays now log hourly statistics (look for
  14197. "channel_check_for_duplicates" lines) on the total number of
  14198. connections to other relays. If the number of connections per
  14199. relay is unexpectedly large, this log message is at notice level.
  14200. Otherwise it is at info.
  14201. o Major bugfixes (entry guards):
  14202. - Don't block bootstrapping when a primary bridge is offline and we
  14203. can't get its descriptor. Fixes bug 22325; fixes one case of bug
  14204. 21969; bugfix on 0.3.0.3-alpha.
  14205. o Major bugfixes (linux TPROXY support):
  14206. - Fix a typo that had prevented TPROXY-based transparent proxying
  14207. from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
  14208. Patch from "d4fq0fQAgoJ".
  14209. o Minor features (security, windows):
  14210. - Enable a couple of pieces of Windows hardening: one
  14211. (HeapEnableTerminationOnCorruption) that has been on-by-default
  14212. since Windows 8, and unavailable before Windows 7; and one
  14213. (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't
  14214. affect us, but shouldn't do any harm. Closes ticket 21953.
  14215. o Minor features (config options):
  14216. - Allow "%include" directives in torrc configuration files. These
  14217. directives import the settings from other files, or from all the
  14218. files in a directory. Closes ticket 1922. Code by Daniel Pinto.
  14219. - Make SAVECONF return an error when overwriting a torrc that has
  14220. includes. Using SAVECONF with the FORCE option will allow it to
  14221. overwrite torrc even if includes are used. Related to ticket 1922.
  14222. - Add "GETINFO config-can-saveconf" to tell controllers if SAVECONF
  14223. will work without the FORCE option. Related to ticket 1922.
  14224. o Minor features (controller):
  14225. - Warn the first time that a controller requests data in the long-
  14226. deprecated 'GETINFO network-status' format. Closes ticket 21703.
  14227. o Minor features (defaults):
  14228. - The default value for UseCreateFast is now 0: clients which
  14229. haven't yet received a consensus document will now use a proper
  14230. ntor handshake to talk to their directory servers whenever they
  14231. can. Closes ticket 21407.
  14232. - Onion key rotation and expiry intervals are now defined as a
  14233. network consensus parameter, per proposal 274. The default
  14234. lifetime of an onion key is increased from 7 to 28 days. Old onion
  14235. keys will expire after 7 days by default. This change will make
  14236. consensus diffs much smaller, and save significant bandwidth.
  14237. Closes ticket 21641.
  14238. o Minor features (fallback directory list):
  14239. - Update the fallback directory mirror whitelist and blacklist based
  14240. on operator emails. Closes task 21121.
  14241. - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
  14242. December 2016 (of which ~126 were still functional) with a list of
  14243. 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
  14244. 2017. Resolves ticket 21564.
  14245. o Minor features (hidden services, logging):
  14246. - Log a message when a hidden service descriptor has fewer
  14247. introduction points than specified in
  14248. HiddenServiceNumIntroductionPoints. Closes tickets 21598.
  14249. - Log a message when a hidden service reaches its introduction point
  14250. circuit limit, and when that limit is reset. Follow up to ticket
  14251. 21594; closes ticket 21622.
  14252. - Warn user if multiple entries in EntryNodes and at least one
  14253. HiddenService are used together. Pinning EntryNodes along with a
  14254. hidden service can be possibly harmful; for instance see ticket
  14255. 14917 or 21155. Closes ticket 21155.
  14256. o Minor features (linux seccomp2 sandbox):
  14257. - We now have a document storage backend compatible with the Linux
  14258. seccomp2 sandbox. This backend is used for consensus documents and
  14259. diffs between them; in the long term, we'd like to use it for
  14260. unparseable directory material too. Closes ticket 21645
  14261. - Increase the maximum allowed size passed to mprotect(PROT_WRITE)
  14262. from 1MB to 16MB. This was necessary with the glibc allocator in
  14263. order to allow worker threads to allocate more memory -- which in
  14264. turn is necessary because of our new use of worker threads for
  14265. compression. Closes ticket 22096.
  14266. o Minor features (logging):
  14267. - Log files are no longer created world-readable by default.
  14268. (Previously, most distributors would store the logs in a non-
  14269. world-readable location to prevent inappropriate access. This
  14270. change is an extra precaution.) Closes ticket 21729; patch
  14271. from toralf.
  14272. o Minor features (performance):
  14273. - Our Keccak (SHA-3) implementation now accesses memory more
  14274. efficiently, especially on little-endian systems. Closes
  14275. ticket 21737.
  14276. - Add an O(1) implementation of channel_find_by_global_id(), to
  14277. speed some controller functions.
  14278. o Minor features (relay, configuration):
  14279. - The MyFamily option may now be repeated as many times as desired,
  14280. for relays that want to configure large families. Closes ticket
  14281. 4998; patch by Daniel Pinto.
  14282. o Minor features (safety):
  14283. - Add an explicit check to extrainfo_parse_entry_from_string() for
  14284. NULL inputs. We don't believe this can actually happen, but it may
  14285. help silence a warning from the Clang analyzer. Closes
  14286. ticket 21496.
  14287. o Minor features (testing):
  14288. - Add a "--disable-memory-sentinels" feature to help with fuzzing.
  14289. When Tor is compiled with this option, we disable a number of
  14290. redundant memory-safety failsafes that are intended to stop bugs
  14291. from becoming security issues. This makes it easier to hunt for
  14292. bugs that would be security issues without the failsafes turned
  14293. on. Closes ticket 21439.
  14294. - Add a general event-tracing instrumentation support to Tor. This
  14295. subsystem will enable developers and researchers to add fine-
  14296. grained instrumentation to their Tor instances, for use when
  14297. examining Tor network performance issues. There are no trace
  14298. events yet, and event-tracing is off by default unless enabled at
  14299. compile time. Implements ticket 13802.
  14300. - Improve our version parsing tests: add tests for typical version
  14301. components, add tests for invalid versions, including numeric
  14302. range and non-numeric prefixes. Unit tests 21278, 21450, and
  14303. 21507. Partially implements 21470.
  14304. o Minor bugfixes (bandwidth accounting):
  14305. - Roll over monthly accounting at the configured hour and minute,
  14306. rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1.
  14307. Found by Andrey Karpov with PVS-Studio.
  14308. o Minor bugfixes (code correctness):
  14309. - Accurately identify client connections by their lack of peer
  14310. authentication. This means that we bail out earlier if asked to
  14311. extend to a client. Follow-up to 21407. Fixes bug 21406; bugfix
  14312. on 0.2.4.23.
  14313. o Minor bugfixes (configuration):
  14314. - Do not crash when starting with LearnCircuitBuildTimeout 0. Fixes
  14315. bug 22252; bugfix on 0.2.9.3-alpha.
  14316. o Minor bugfixes (connection lifespan):
  14317. - Allow more control over how long TLS connections are kept open:
  14318. unify CircuitIdleTimeout and PredictedPortsRelevanceTime into a
  14319. single option called CircuitsAvailableTimeout. Also, allow the
  14320. consensus to control the default values for both this preference
  14321. and the lifespan of relay-to-relay connections. Fixes bug 17592;
  14322. bugfix on 0.2.5.5-alpha.
  14323. - Increase the initial circuit build timeout testing frequency, to
  14324. help ensure that ReducedConnectionPadding clients finish learning
  14325. a timeout before their orconn would expire. The initial testing
  14326. rate was set back in the days of TAP and before the Tor Browser
  14327. updater, when we had to be much more careful about new clients
  14328. making lots of circuits. With this change, a circuit build timeout
  14329. is learned in about 15-20 minutes, instead of 100-120 minutes.
  14330. o Minor bugfixes (controller):
  14331. - GETINFO onions/current and onions/detached no longer respond with
  14332. 551 on empty lists. Fixes bug 21329; bugfix on 0.2.7.1-alpha.
  14333. - Trigger HS descriptor events on the control port when the client
  14334. fails to pick a hidden service directory for a hidden service.
  14335. This can happen if all the hidden service directories are in
  14336. ExcludeNodes, or they have all been queried within the last 15
  14337. minutes. Fixes bug 22042; bugfix on 0.2.5.2-alpha.
  14338. o Minor bugfixes (directory authority):
  14339. - When rejecting a router descriptor for running an obsolete version
  14340. of Tor without ntor support, warn about the obsolete tor version,
  14341. not the missing ntor key. Fixes bug 20270; bugfix on 0.2.9.3-alpha.
  14342. - Prevent the shared randomness subsystem from asserting when
  14343. initialized by a bridge authority with an incomplete configuration
  14344. file. Fixes bug 21586; bugfix on 0.2.9.8.
  14345. o Minor bugfixes (exit-side DNS):
  14346. - Fix an untriggerable assertion that checked the output of a
  14347. libevent DNS error, so that the assertion actually behaves as
  14348. expected. Fixes bug 22244; bugfix on 0.2.0.20-rc. Found by Andrey
  14349. Karpov using PVS-Studio.
  14350. o Minor bugfixes (fallback directories):
  14351. - Make the usage example in updateFallbackDirs.py actually work, and
  14352. explain what it does. Fixes bug 22270; bugfix on 0.3.0.3-alpha.
  14353. - Decrease the guard flag average required to be a fallback. This
  14354. allows us to keep relays that have their guard flag removed when
  14355. they restart. Fixes bug 20913; bugfix on 0.2.8.1-alpha.
  14356. - Decrease the minimum number of fallbacks to 100. Fixes bug 20913;
  14357. bugfix on 0.2.8.1-alpha.
  14358. - Make sure fallback directory mirrors have the same address, port,
  14359. and relay identity key for at least 30 days before they are
  14360. selected. Fixes bug 20913; bugfix on 0.2.8.1-alpha.
  14361. o Minor bugfixes (hidden services):
  14362. - Stop printing a cryptic warning when a hidden service gets a
  14363. request to connect to a virtual port that it hasn't configured.
  14364. Fixes bug 16706; bugfix on 0.2.6.3-alpha.
  14365. - Simplify hidden service descriptor creation by using an existing
  14366. flag to check if an introduction point is established. Fixes bug
  14367. 21599; bugfix on 0.2.7.2-alpha.
  14368. o Minor bugfixes (memory leak):
  14369. - Fix a small memory leak at exit from the backtrace handler code.
  14370. Fixes bug 21788; bugfix on 0.2.5.2-alpha. Patch from Daniel Pinto.
  14371. o Minor bugfixes (protocol, logging):
  14372. - Downgrade a log statement about unexpected relay cells from "bug"
  14373. to "protocol warning", because there is at least one use case
  14374. where it can be triggered by a buggy tor implementation. Fixes bug
  14375. 21293; bugfix on 0.1.1.14-alpha.
  14376. o Minor bugfixes (testing):
  14377. - Use unbuffered I/O for utility functions around the
  14378. process_handle_t type. This fixes unit test failures reported on
  14379. OpenBSD and FreeBSD. Fixes bug 21654; bugfix on 0.2.3.1-alpha.
  14380. - Make display of captured unit test log messages consistent. Fixes
  14381. bug 21510; bugfix on 0.2.9.3-alpha.
  14382. - Make test-network.sh always call chutney's test-network.sh.
  14383. Previously, this only worked on systems which had bash installed,
  14384. due to some bash-specific code in the script. Fixes bug 19699;
  14385. bugfix on 0.3.0.4-rc. Follow-up to ticket 21581.
  14386. o Minor bugfixes (voting consistency):
  14387. - Reject version numbers with non-numeric prefixes (such as +, -, or
  14388. whitespace). Disallowing whitespace prevents differential version
  14389. parsing between POSIX-based and Windows platforms. Fixes bug 21507
  14390. and part of 21508; bugfix on 0.0.8pre1.
  14391. o Minor bugfixes (windows, relay):
  14392. - Resolve "Failure from drain_fd: No error" warnings on Windows
  14393. relays. Fixes bug 21540; bugfix on 0.2.6.3-alpha.
  14394. o Code simplification and refactoring:
  14395. - Break up the 630-line function connection_dir_client_reached_eof()
  14396. into a dozen smaller functions. This change should help
  14397. maintainability and readability of the client directory code.
  14398. - Isolate our use of the openssl headers so that they are only
  14399. included from our crypto wrapper modules, and from tests that
  14400. examine those modules' internals. Closes ticket 21841.
  14401. - Simplify our API to launch directory requests, making it more
  14402. extensible and less error-prone. Now it's easier to add extra
  14403. headers to directory requests. Closes ticket 21646.
  14404. - Our base64 decoding functions no longer overestimate the output
  14405. space that they need when parsing unpadded inputs. Closes
  14406. ticket 17868.
  14407. - Remove unused "ROUTER_ADDED_NOTIFY_GENERATOR" internal value.
  14408. Resolves ticket 22213.
  14409. - The logic that directory caches use to spool request to clients,
  14410. serving them one part at a time so as not to allocate too much
  14411. memory, has been refactored for consistency. Previously there was
  14412. a separate spooling implementation per type of spoolable data. Now
  14413. there is one common spooling implementation, with extensible data
  14414. types. Closes ticket 21651.
  14415. - Tor's compression module now supports multiple backends. Part of
  14416. the implementation for proposal 278; closes ticket 21663.
  14417. o Documentation:
  14418. - Clarify the behavior of the KeepAliveIsolateSOCKSAuth sub-option.
  14419. Closes ticket 21873.
  14420. - Correct documentation about the default DataDirectory value.
  14421. Closes ticket 21151.
  14422. - Document the default behavior of NumEntryGuards and
  14423. NumDirectoryGuards correctly. Fixes bug 21715; bugfix
  14424. on 0.3.0.1-alpha.
  14425. - Document key=value pluggable transport arguments for Bridge lines
  14426. in torrc. Fixes bug 20341; bugfix on 0.2.5.1-alpha.
  14427. - Note that bandwidth-limiting options don't affect TCP headers or
  14428. DNS. Closes ticket 17170.
  14429. o Removed features (configuration options, all in ticket 22060):
  14430. - These configuration options are now marked Obsolete, and no longer
  14431. have any effect: AllowInvalidNodes, AllowSingleHopCircuits,
  14432. AllowSingleHopExits, ExcludeSingleHopRelays, FastFirstHopPK,
  14433. TLSECGroup, WarnUnsafeSocks. They were first marked as deprecated
  14434. in 0.2.9.2-alpha and have now been removed. The previous default
  14435. behavior is now always chosen; the previous (less secure) non-
  14436. default behavior is now unavailable.
  14437. - CloseHSClientCircuitsImmediatelyOnTimeout and
  14438. CloseHSServiceRendCircuitsImmediatelyOnTimeout were deprecated in
  14439. 0.2.9.2-alpha and now have been removed. HS circuits never close
  14440. on circuit build timeout; they have a longer timeout period.
  14441. - {Control,DNS,Dir,Socks,Trans,NATD,OR}ListenAddress were deprecated
  14442. in 0.2.9.2-alpha and now have been removed. Use the ORPort option
  14443. (and others) to configure listen-only and advertise-only addresses.
  14444. o Removed features (tools):
  14445. - We've removed the tor-checkkey tool from src/tools. Long ago, we
  14446. used it to help people detect RSA keys that were generated by
  14447. versions of Debian affected by CVE-2008-0166. But those keys have
  14448. been out of circulation for ages, and this tool is no longer
  14449. required. Closes ticket 21842.
  14450. Changes in version 0.3.0.7 - 2017-05-15
  14451. Tor 0.3.0.7 fixes a medium-severity security bug in earlier versions
  14452. of Tor 0.3.0.x, where an attacker could cause a Tor relay process
  14453. to exit. Relays running earlier versions of Tor 0.3.0.x should upgrade;
  14454. clients are not affected.
  14455. o Major bugfixes (hidden service directory, security):
  14456. - Fix an assertion failure in the hidden service directory code, which
  14457. could be used by an attacker to remotely cause a Tor relay process to
  14458. exit. Relays running earlier versions of Tor 0.3.0.x should upgrade.
  14459. should upgrade. This security issue is tracked as TROVE-2017-002.
  14460. Fixes bug 22246; bugfix on 0.3.0.1-alpha.
  14461. o Minor features:
  14462. - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
  14463. Country database.
  14464. o Minor features (future-proofing):
  14465. - Tor no longer refuses to download microdescriptors or descriptors
  14466. if they are listed as "published in the future". This change will
  14467. eventually allow us to stop listing meaningful "published" dates
  14468. in microdescriptor consensuses, and thereby allow us to reduce the
  14469. resources required to download consensus diffs by over 50%.
  14470. Implements part of ticket 21642; implements part of proposal 275.
  14471. o Minor bugfixes (Linux seccomp2 sandbox):
  14472. - The getpid() system call is now permitted under the Linux seccomp2
  14473. sandbox, to avoid crashing with versions of OpenSSL (and other
  14474. libraries) that attempt to learn the process's PID by using the
  14475. syscall rather than the VDSO code. Fixes bug 21943; bugfix
  14476. on 0.2.5.1-alpha.
  14477. Changes in version 0.3.0.6 - 2017-04-26
  14478. Tor 0.3.0.6 is the first stable release of the Tor 0.3.0 series.
  14479. With the 0.3.0 series, clients and relays now use Ed25519 keys to
  14480. authenticate their link connections to relays, rather than the old
  14481. RSA1024 keys that they used before. (Circuit crypto has been
  14482. Curve25519-authenticated since 0.2.4.8-alpha.) We have also replaced
  14483. the guard selection and replacement algorithm to behave more robustly
  14484. in the presence of unreliable networks, and to resist guard-
  14485. capture attacks.
  14486. This series also includes numerous other small features and bugfixes,
  14487. along with more groundwork for the upcoming hidden-services revamp.
  14488. Per our stable release policy, we plan to support the Tor 0.3.0
  14489. release series for at least the next nine months, or for three months
  14490. after the first stable release of the 0.3.1 series: whichever is
  14491. longer. If you need a release with long-term support, we recommend
  14492. that you stay with the 0.2.9 series.
  14493. Below are the changes since 0.3.0.5-rc. For a list of all changes
  14494. since 0.2.9, see the ReleaseNotes file.
  14495. o Minor features (geoip):
  14496. - Update geoip and geoip6 to the April 4 2017 Maxmind GeoLite2
  14497. Country database.
  14498. o Minor bugfixes (control port):
  14499. - The GETINFO extra-info/digest/<digest> command was broken because
  14500. of a wrong base16 decode return value check, introduced when
  14501. refactoring that API. Fixes bug 22034; bugfix on 0.2.9.1-alpha.
  14502. o Minor bugfixes (crash prevention):
  14503. - Fix a (currently untriggerable, but potentially dangerous) crash
  14504. bug when base32-encoding inputs whose sizes are not a multiple of
  14505. 5. Fixes bug 21894; bugfix on 0.2.9.1-alpha.
  14506. Changes in version 0.3.0.5-rc - 2017-04-05
  14507. Tor 0.3.0.5-rc fixes a few remaining bugs, large and small, in the
  14508. 0.3.0 release series.
  14509. This is the second release candidate in the Tor 0.3.0 series, and has
  14510. much fewer changes than the first. If we find no new bugs or
  14511. regressions here, the first stable 0.3.0 release will be nearly
  14512. identical to it.
  14513. o Major bugfixes (crash, directory connections):
  14514. - Fix a rare crash when sending a begin cell on a circuit whose
  14515. linked directory connection had already been closed. Fixes bug
  14516. 21576; bugfix on 0.2.9.3-alpha. Reported by Alec Muffett.
  14517. o Major bugfixes (guard selection):
  14518. - Fix a guard selection bug where Tor would refuse to bootstrap in
  14519. some cases if the user swapped a bridge for another bridge in
  14520. their configuration file. Fixes bug 21771; bugfix on 0.3.0.1-alpha.
  14521. Reported by "torvlnt33r".
  14522. o Minor features (geoip):
  14523. - Update geoip and geoip6 to the March 7 2017 Maxmind GeoLite2
  14524. Country database.
  14525. o Minor bugfix (compilation):
  14526. - Fix a warning when compiling hs_service.c. Previously, it had no
  14527. exported symbols when compiled for libor.a, resulting in a
  14528. compilation warning from clang. Fixes bug 21825; bugfix
  14529. on 0.3.0.1-alpha.
  14530. o Minor bugfixes (hidden services):
  14531. - Make hidden services check for failed intro point connections,
  14532. even when they have exceeded their intro point creation limit.
  14533. Fixes bug 21596; bugfix on 0.2.7.2-alpha. Reported by Alec Muffett.
  14534. - Make hidden services with 8 to 10 introduction points check for
  14535. failed circuits immediately after startup. Previously, they would
  14536. wait for 5 minutes before performing their first checks. Fixes bug
  14537. 21594; bugfix on 0.2.3.9-alpha. Reported by Alec Muffett.
  14538. o Minor bugfixes (memory leaks):
  14539. - Fix a memory leak when using GETCONF on a port option. Fixes bug
  14540. 21682; bugfix on 0.3.0.3-alpha.
  14541. o Minor bugfixes (relay):
  14542. - Avoid a double-marked-circuit warning that could happen when we
  14543. receive DESTROY cells under heavy load. Fixes bug 20059; bugfix
  14544. on 0.1.0.1-rc.
  14545. o Minor bugfixes (tests):
  14546. - Run the entry_guard_parse_from_state_full() test with the time set
  14547. to a specific date. (The guard state that this test was parsing
  14548. contained guards that had expired since the test was first
  14549. written.) Fixes bug 21799; bugfix on 0.3.0.1-alpha.
  14550. o Documentation:
  14551. - Update the description of the directory server options in the
  14552. manual page, to clarify that a relay no longer needs to set
  14553. DirPort in order to be a directory cache. Closes ticket 21720.
  14554. Changes in version 0.2.8.13 - 2017-03-03
  14555. Tor 0.2.8.13 backports a security fix from later Tor
  14556. releases. Anybody running Tor 0.2.8.12 or earlier should upgrade to this
  14557. this release, if for some reason they cannot upgrade to a later
  14558. release series, and if they build Tor with the --enable-expensive-hardening
  14559. option.
  14560. Note that support for Tor 0.2.8.x is ending next year: we will not issue
  14561. any fixes for the Tor 0.2.8.x series after 1 Jan 2018. If you need
  14562. a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
  14563. o Major bugfixes (parsing, backported from 0.3.0.4-rc):
  14564. - Fix an integer underflow bug when comparing malformed Tor
  14565. versions. This bug could crash Tor when built with
  14566. --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
  14567. 0.2.9.8, which were built with -ftrapv by default. In other cases
  14568. it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
  14569. on 0.0.8pre1. Found by OSS-Fuzz.
  14570. o Minor features (geoip):
  14571. - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
  14572. Country database.
  14573. Changes in version 0.2.7.7 - 2017-03-03
  14574. Tor 0.2.7.7 backports a number of security fixes from later Tor
  14575. releases. Anybody running Tor 0.2.7.6 or earlier should upgrade to
  14576. this release, if for some reason they cannot upgrade to a later
  14577. release series.
  14578. Note that support for Tor 0.2.7.x is ending this year: we will not issue
  14579. any fixes for the Tor 0.2.7.x series after 1 August 2017. If you need
  14580. a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
  14581. o Directory authority changes (backport from 0.2.8.5-rc):
  14582. - Urras is no longer a directory authority. Closes ticket 19271.
  14583. o Directory authority changes (backport from 0.2.9.2-alpha):
  14584. - The "Tonga" bridge authority has been retired; the new bridge
  14585. authority is "Bifroest". Closes tickets 19728 and 19690.
  14586. o Directory authority key updates (backport from 0.2.8.1-alpha):
  14587. - Update the V3 identity key for the dannenberg directory authority:
  14588. it was changed on 18 November 2015. Closes task 17906. Patch
  14589. by "teor".
  14590. o Major bugfixes (parsing, security, backport from 0.2.9.8):
  14591. - Fix a bug in parsing that could cause clients to read a single
  14592. byte past the end of an allocated region. This bug could be used
  14593. to cause hardened clients (built with --enable-expensive-hardening)
  14594. to crash if they tried to visit a hostile hidden service. Non-
  14595. hardened clients are only affected depending on the details of
  14596. their platform's memory allocator. Fixes bug 21018; bugfix on
  14597. 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
  14598. 2016-12-002 and as CVE-2016-1254.
  14599. o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha):
  14600. - Stop a crash that could occur when a client running with DNSPort
  14601. received a query with multiple address types, and the first
  14602. address type was not supported. Found and fixed by Scott Dial.
  14603. Fixes bug 18710; bugfix on 0.2.5.4-alpha.
  14604. - Prevent a class of security bugs caused by treating the contents
  14605. of a buffer chunk as if they were a NUL-terminated string. At
  14606. least one such bug seems to be present in all currently used
  14607. versions of Tor, and would allow an attacker to remotely crash
  14608. most Tor instances, especially those compiled with extra compiler
  14609. hardening. With this defense in place, such bugs can't crash Tor,
  14610. though we should still fix them as they occur. Closes ticket
  14611. 20384 (TROVE-2016-10-001).
  14612. o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
  14613. - Avoid a difficult-to-trigger heap corruption attack when extending
  14614. a smartlist to contain over 16GB of pointers. Fixes bug 18162;
  14615. bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
  14616. Reported by Guido Vranken.
  14617. o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
  14618. - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
  14619. bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
  14620. o Major bugfixes (key management, backport from 0.2.8.3-alpha):
  14621. - If OpenSSL fails to generate an RSA key, do not retain a dangling
  14622. pointer to the previous (uninitialized) key value. The impact here
  14623. should be limited to a difficult-to-trigger crash, if OpenSSL is
  14624. running an engine that makes key generation failures possible, or
  14625. if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
  14626. 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
  14627. Baishakhi Ray.
  14628. o Major bugfixes (parsing, backported from 0.3.0.4-rc):
  14629. - Fix an integer underflow bug when comparing malformed Tor
  14630. versions. This bug could crash Tor when built with
  14631. --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
  14632. 0.2.9.8, which were built with -ftrapv by default. In other cases
  14633. it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
  14634. on 0.0.8pre1. Found by OSS-Fuzz.
  14635. o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
  14636. - Make memwipe() do nothing when passed a NULL pointer or buffer of
  14637. zero size. Check size argument to memwipe() for underflow. Fixes
  14638. bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
  14639. patch by "teor".
  14640. o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
  14641. - Make Tor survive errors involving connections without a
  14642. corresponding event object. Previously we'd fail with an
  14643. assertion; now we produce a log message. Related to bug 16248.
  14644. o Minor features (geoip):
  14645. - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
  14646. Country database.
  14647. Changes in version 0.2.6.11 - 2017-03-03
  14648. Tor 0.2.6.11 backports a number of security fixes from later Tor
  14649. releases. Anybody running Tor 0.2.6.10 or earlier should upgrade to
  14650. this release, if for some reason they cannot upgrade to a later
  14651. release series.
  14652. Note that support for Tor 0.2.6.x is ending this year: we will not issue
  14653. any fixes for the Tor 0.2.6.x series after 1 August 2017. If you need
  14654. a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
  14655. o Directory authority changes (backport from 0.2.8.5-rc):
  14656. - Urras is no longer a directory authority. Closes ticket 19271.
  14657. o Directory authority changes (backport from 0.2.9.2-alpha):
  14658. - The "Tonga" bridge authority has been retired; the new bridge
  14659. authority is "Bifroest". Closes tickets 19728 and 19690.
  14660. o Directory authority key updates (backport from 0.2.8.1-alpha):
  14661. - Update the V3 identity key for the dannenberg directory authority:
  14662. it was changed on 18 November 2015. Closes task 17906. Patch
  14663. by "teor".
  14664. o Major features (security fixes, backport from 0.2.9.4-alpha):
  14665. - Prevent a class of security bugs caused by treating the contents
  14666. of a buffer chunk as if they were a NUL-terminated string. At
  14667. least one such bug seems to be present in all currently used
  14668. versions of Tor, and would allow an attacker to remotely crash
  14669. most Tor instances, especially those compiled with extra compiler
  14670. hardening. With this defense in place, such bugs can't crash Tor,
  14671. though we should still fix them as they occur. Closes ticket
  14672. 20384 (TROVE-2016-10-001).
  14673. o Major bugfixes (parsing, security, backport from 0.2.9.8):
  14674. - Fix a bug in parsing that could cause clients to read a single
  14675. byte past the end of an allocated region. This bug could be used
  14676. to cause hardened clients (built with --enable-expensive-hardening)
  14677. to crash if they tried to visit a hostile hidden service. Non-
  14678. hardened clients are only affected depending on the details of
  14679. their platform's memory allocator. Fixes bug 21018; bugfix on
  14680. 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
  14681. 2016-12-002 and as CVE-2016-1254.
  14682. o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha):
  14683. - Stop a crash that could occur when a client running with DNSPort
  14684. received a query with multiple address types, and the first
  14685. address type was not supported. Found and fixed by Scott Dial.
  14686. Fixes bug 18710; bugfix on 0.2.5.4-alpha.
  14687. o Major bugfixes (security, correctness, backport from 0.2.7.4-rc):
  14688. - Fix an error that could cause us to read 4 bytes before the
  14689. beginning of an openssl string. This bug could be used to cause
  14690. Tor to crash on systems with unusual malloc implementations, or
  14691. systems with unusual hardening installed. Fixes bug 17404; bugfix
  14692. on 0.2.3.6-alpha.
  14693. o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
  14694. - Avoid a difficult-to-trigger heap corruption attack when extending
  14695. a smartlist to contain over 16GB of pointers. Fixes bug 18162;
  14696. bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
  14697. Reported by Guido Vranken.
  14698. o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
  14699. - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
  14700. bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
  14701. o Major bugfixes (guard selection, backport from 0.2.7.6):
  14702. - Actually look at the Guard flag when selecting a new directory
  14703. guard. When we implemented the directory guard design, we
  14704. accidentally started treating all relays as if they have the Guard
  14705. flag during guard selection, leading to weaker anonymity and worse
  14706. performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
  14707. by Mohsen Imani.
  14708. o Major bugfixes (key management, backport from 0.2.8.3-alpha):
  14709. - If OpenSSL fails to generate an RSA key, do not retain a dangling
  14710. pointer to the previous (uninitialized) key value. The impact here
  14711. should be limited to a difficult-to-trigger crash, if OpenSSL is
  14712. running an engine that makes key generation failures possible, or
  14713. if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
  14714. 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
  14715. Baishakhi Ray.
  14716. o Major bugfixes (parsing, backported from 0.3.0.4-rc):
  14717. - Fix an integer underflow bug when comparing malformed Tor
  14718. versions. This bug could crash Tor when built with
  14719. --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
  14720. 0.2.9.8, which were built with -ftrapv by default. In other cases
  14721. it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
  14722. on 0.0.8pre1. Found by OSS-Fuzz.
  14723. o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
  14724. - Make memwipe() do nothing when passed a NULL pointer or buffer of
  14725. zero size. Check size argument to memwipe() for underflow. Fixes
  14726. bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
  14727. patch by "teor".
  14728. o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
  14729. - Make Tor survive errors involving connections without a
  14730. corresponding event object. Previously we'd fail with an
  14731. assertion; now we produce a log message. Related to bug 16248.
  14732. o Minor features (geoip):
  14733. - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
  14734. Country database.
  14735. o Minor bugfixes (compilation, backport from 0.2.7.6):
  14736. - Fix a compilation warning with Clang 3.6: Do not check the
  14737. presence of an address which can never be NULL. Fixes bug 17781.
  14738. Changes in version 0.2.5.13 - 2017-03-03
  14739. Tor 0.2.5.13 backports a number of security fixes from later Tor
  14740. releases. Anybody running Tor 0.2.5.13 or earlier should upgrade to
  14741. this release, if for some reason they cannot upgrade to a later
  14742. release series.
  14743. Note that support for Tor 0.2.5.x is ending next year: we will not issue
  14744. any fixes for the Tor 0.2.5.x series after 1 May 2018. If you need
  14745. a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
  14746. o Directory authority changes (backport from 0.2.8.5-rc):
  14747. - Urras is no longer a directory authority. Closes ticket 19271.
  14748. o Directory authority changes (backport from 0.2.9.2-alpha):
  14749. - The "Tonga" bridge authority has been retired; the new bridge
  14750. authority is "Bifroest". Closes tickets 19728 and 19690.
  14751. o Directory authority key updates (backport from 0.2.8.1-alpha):
  14752. - Update the V3 identity key for the dannenberg directory authority:
  14753. it was changed on 18 November 2015. Closes task 17906. Patch
  14754. by "teor".
  14755. o Major features (security fixes, backport from 0.2.9.4-alpha):
  14756. - Prevent a class of security bugs caused by treating the contents
  14757. of a buffer chunk as if they were a NUL-terminated string. At
  14758. least one such bug seems to be present in all currently used
  14759. versions of Tor, and would allow an attacker to remotely crash
  14760. most Tor instances, especially those compiled with extra compiler
  14761. hardening. With this defense in place, such bugs can't crash Tor,
  14762. though we should still fix them as they occur. Closes ticket
  14763. 20384 (TROVE-2016-10-001).
  14764. o Major bugfixes (parsing, security, backport from 0.2.9.8):
  14765. - Fix a bug in parsing that could cause clients to read a single
  14766. byte past the end of an allocated region. This bug could be used
  14767. to cause hardened clients (built with --enable-expensive-hardening)
  14768. to crash if they tried to visit a hostile hidden service. Non-
  14769. hardened clients are only affected depending on the details of
  14770. their platform's memory allocator. Fixes bug 21018; bugfix on
  14771. 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
  14772. 2016-12-002 and as CVE-2016-1254.
  14773. o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha):
  14774. - Stop a crash that could occur when a client running with DNSPort
  14775. received a query with multiple address types, and the first
  14776. address type was not supported. Found and fixed by Scott Dial.
  14777. Fixes bug 18710; bugfix on 0.2.5.4-alpha.
  14778. o Major bugfixes (security, correctness, backport from 0.2.7.4-rc):
  14779. - Fix an error that could cause us to read 4 bytes before the
  14780. beginning of an openssl string. This bug could be used to cause
  14781. Tor to crash on systems with unusual malloc implementations, or
  14782. systems with unusual hardening installed. Fixes bug 17404; bugfix
  14783. on 0.2.3.6-alpha.
  14784. o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
  14785. - Avoid a difficult-to-trigger heap corruption attack when extending
  14786. a smartlist to contain over 16GB of pointers. Fixes bug 18162;
  14787. bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
  14788. Reported by Guido Vranken.
  14789. o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
  14790. - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
  14791. bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
  14792. o Major bugfixes (guard selection, backport from 0.2.7.6):
  14793. - Actually look at the Guard flag when selecting a new directory
  14794. guard. When we implemented the directory guard design, we
  14795. accidentally started treating all relays as if they have the Guard
  14796. flag during guard selection, leading to weaker anonymity and worse
  14797. performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
  14798. by Mohsen Imani.
  14799. o Major bugfixes (key management, backport from 0.2.8.3-alpha):
  14800. - If OpenSSL fails to generate an RSA key, do not retain a dangling
  14801. pointer to the previous (uninitialized) key value. The impact here
  14802. should be limited to a difficult-to-trigger crash, if OpenSSL is
  14803. running an engine that makes key generation failures possible, or
  14804. if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
  14805. 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
  14806. Baishakhi Ray.
  14807. o Major bugfixes (parsing, backported from 0.3.0.4-rc):
  14808. - Fix an integer underflow bug when comparing malformed Tor
  14809. versions. This bug could crash Tor when built with
  14810. --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
  14811. 0.2.9.8, which were built with -ftrapv by default. In other cases
  14812. it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
  14813. on 0.0.8pre1. Found by OSS-Fuzz.
  14814. o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
  14815. - Make memwipe() do nothing when passed a NULL pointer or buffer of
  14816. zero size. Check size argument to memwipe() for underflow. Fixes
  14817. bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
  14818. patch by "teor".
  14819. o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
  14820. - Make Tor survive errors involving connections without a
  14821. corresponding event object. Previously we'd fail with an
  14822. assertion; now we produce a log message. Related to bug 16248.
  14823. o Minor features (geoip):
  14824. - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
  14825. Country database.
  14826. o Minor bugfixes (compilation, backport from 0.2.7.6):
  14827. - Fix a compilation warning with Clang 3.6: Do not check the
  14828. presence of an address which can never be NULL. Fixes bug 17781.
  14829. o Minor bugfixes (crypto error-handling, backport from 0.2.7.2-alpha):
  14830. - Check for failures from crypto_early_init, and refuse to continue.
  14831. A previous typo meant that we could keep going with an
  14832. uninitialized crypto library, and would have OpenSSL initialize
  14833. its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
  14834. when implementing ticket 4900. Patch by "teor".
  14835. o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
  14836. - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
  14837. a client authorized hidden service. Fixes bug 15823; bugfix
  14838. on 0.2.1.6-alpha.
  14839. Changes in version 0.2.4.28 - 2017-03-03
  14840. Tor 0.2.4.28 backports a number of security fixes from later Tor
  14841. releases. Anybody running Tor 0.2.4.27 or earlier should upgrade to
  14842. this release, if for some reason they cannot upgrade to a later
  14843. release series.
  14844. Note that support for Tor 0.2.4.x is ending soon: we will not issue
  14845. any fixes for the Tor 0.2.4.x series after 1 August 2017. If you need
  14846. a Tor release series with long-term support, we recommend Tor 0.2.9.x.
  14847. o Directory authority changes (backport from 0.2.8.5-rc):
  14848. - Urras is no longer a directory authority. Closes ticket 19271.
  14849. o Directory authority changes (backport from 0.2.9.2-alpha):
  14850. - The "Tonga" bridge authority has been retired; the new bridge
  14851. authority is "Bifroest". Closes tickets 19728 and 19690.
  14852. o Directory authority key updates (backport from 0.2.8.1-alpha):
  14853. - Update the V3 identity key for the dannenberg directory authority:
  14854. it was changed on 18 November 2015. Closes task 17906. Patch
  14855. by "teor".
  14856. o Major features (security fixes, backport from 0.2.9.4-alpha):
  14857. - Prevent a class of security bugs caused by treating the contents
  14858. of a buffer chunk as if they were a NUL-terminated string. At
  14859. least one such bug seems to be present in all currently used
  14860. versions of Tor, and would allow an attacker to remotely crash
  14861. most Tor instances, especially those compiled with extra compiler
  14862. hardening. With this defense in place, such bugs can't crash Tor,
  14863. though we should still fix them as they occur. Closes ticket
  14864. 20384 (TROVE-2016-10-001).
  14865. o Major bugfixes (parsing, security, backport from 0.2.9.8):
  14866. - Fix a bug in parsing that could cause clients to read a single
  14867. byte past the end of an allocated region. This bug could be used
  14868. to cause hardened clients (built with --enable-expensive-hardening)
  14869. to crash if they tried to visit a hostile hidden service. Non-
  14870. hardened clients are only affected depending on the details of
  14871. their platform's memory allocator. Fixes bug 21018; bugfix on
  14872. 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
  14873. 2016-12-002 and as CVE-2016-1254.
  14874. o Major bugfixes (security, correctness, backport from 0.2.7.4-rc):
  14875. - Fix an error that could cause us to read 4 bytes before the
  14876. beginning of an openssl string. This bug could be used to cause
  14877. Tor to crash on systems with unusual malloc implementations, or
  14878. systems with unusual hardening installed. Fixes bug 17404; bugfix
  14879. on 0.2.3.6-alpha.
  14880. o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
  14881. - Avoid a difficult-to-trigger heap corruption attack when extending
  14882. a smartlist to contain over 16GB of pointers. Fixes bug 18162;
  14883. bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
  14884. Reported by Guido Vranken.
  14885. o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
  14886. - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
  14887. bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
  14888. o Major bugfixes (guard selection, backport from 0.2.7.6):
  14889. - Actually look at the Guard flag when selecting a new directory
  14890. guard. When we implemented the directory guard design, we
  14891. accidentally started treating all relays as if they have the Guard
  14892. flag during guard selection, leading to weaker anonymity and worse
  14893. performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
  14894. by Mohsen Imani.
  14895. o Major bugfixes (key management, backport from 0.2.8.3-alpha):
  14896. - If OpenSSL fails to generate an RSA key, do not retain a dangling
  14897. pointer to the previous (uninitialized) key value. The impact here
  14898. should be limited to a difficult-to-trigger crash, if OpenSSL is
  14899. running an engine that makes key generation failures possible, or
  14900. if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
  14901. 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
  14902. Baishakhi Ray.
  14903. o Major bugfixes (parsing, backported from 0.3.0.4-rc):
  14904. - Fix an integer underflow bug when comparing malformed Tor
  14905. versions. This bug could crash Tor when built with
  14906. --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
  14907. 0.2.9.8, which were built with -ftrapv by default. In other cases
  14908. it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
  14909. on 0.0.8pre1. Found by OSS-Fuzz.
  14910. o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
  14911. - Make memwipe() do nothing when passed a NULL pointer or buffer of
  14912. zero size. Check size argument to memwipe() for underflow. Fixes
  14913. bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
  14914. patch by "teor".
  14915. o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
  14916. - Make Tor survive errors involving connections without a
  14917. corresponding event object. Previously we'd fail with an
  14918. assertion; now we produce a log message. Related to bug 16248.
  14919. o Minor features (DoS-resistance, backport from 0.2.7.1-alpha):
  14920. - Make it harder for attackers to overload hidden services with
  14921. introductions, by blocking multiple introduction requests on the
  14922. same circuit. Resolves ticket 15515.
  14923. o Minor features (geoip):
  14924. - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
  14925. Country database.
  14926. o Minor bugfixes (compilation, backport from 0.2.7.6):
  14927. - Fix a compilation warning with Clang 3.6: Do not check the
  14928. presence of an address which can never be NULL. Fixes bug 17781.
  14929. o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
  14930. - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
  14931. a client authorized hidden service. Fixes bug 15823; bugfix
  14932. on 0.2.1.6-alpha.
  14933. Changes in version 0.3.0.4-rc - 2017-03-01
  14934. Tor 0.3.0.4-rc fixes some remaining bugs, large and small, in the
  14935. 0.3.0 release series, and introduces a few reliability features to
  14936. keep them from coming back.
  14937. This is the first release candidate in the Tor 0.3.0 series. If we
  14938. find no new bugs or regressions here, the first stable 0.3.0 release
  14939. will be nearly identical to it.
  14940. o Major bugfixes (bridges):
  14941. - When the same bridge is configured multiple times with the same
  14942. identity, but at different address:port combinations, treat those
  14943. bridge instances as separate guards. This fix restores the ability
  14944. of clients to configure the same bridge with multiple pluggable
  14945. transports. Fixes bug 21027; bugfix on 0.3.0.1-alpha.
  14946. o Major bugfixes (hidden service directory v3):
  14947. - Stop crashing on a failed v3 hidden service descriptor lookup
  14948. failure. Fixes bug 21471; bugfixes on 0.3.0.1-alpha.
  14949. o Major bugfixes (parsing):
  14950. - When parsing a malformed content-length field from an HTTP
  14951. message, do not read off the end of the buffer. This bug was a
  14952. potential remote denial-of-service attack against Tor clients and
  14953. relays. A workaround was released in October 2016, to prevent this
  14954. bug from crashing Tor. This is a fix for the underlying issue,
  14955. which should no longer matter (if you applied the earlier patch).
  14956. Fixes bug 20894; bugfix on 0.2.0.16-alpha. Bug found by fuzzing
  14957. using AFL (http://lcamtuf.coredump.cx/afl/).
  14958. - Fix an integer underflow bug when comparing malformed Tor
  14959. versions. This bug could crash Tor when built with
  14960. --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
  14961. 0.2.9.8, which were built with -ftrapv by default. In other cases
  14962. it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
  14963. on 0.0.8pre1. Found by OSS-Fuzz.
  14964. o Minor feature (protocol versioning):
  14965. - Add new protocol version for proposal 224. HSIntro now advertises
  14966. version "3-4" and HSDir version "1-2". Fixes ticket 20656.
  14967. o Minor features (directory authorities):
  14968. - Directory authorities now reject descriptors that claim to be
  14969. malformed versions of Tor. Helps prevent exploitation of
  14970. bug 21278.
  14971. - Reject version numbers with components that exceed INT32_MAX.
  14972. Otherwise 32-bit and 64-bit platforms would behave inconsistently.
  14973. Fixes bug 21450; bugfix on 0.0.8pre1.
  14974. - Directory authorities now reject relays running versions
  14975. 0.2.9.1-alpha through 0.2.9.4-alpha, because those relays
  14976. suffer from bug 20499 and don't keep their consensus cache
  14977. up-to-date. Resolves ticket 20509.
  14978. o Minor features (geoip):
  14979. - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
  14980. Country database.
  14981. o Minor features (reliability, crash):
  14982. - Try better to detect problems in buffers where they might grow (or
  14983. think they have grown) over 2 GB in size. Diagnostic for
  14984. bug 21369.
  14985. o Minor features (testing):
  14986. - During 'make test-network-all', if tor logs any warnings, ask
  14987. chutney to output them. Requires a recent version of chutney with
  14988. the 21572 patch. Implements 21570.
  14989. o Minor bugfixes (certificate expiration time):
  14990. - Avoid using link certificates that don't become valid till some
  14991. time in the future. Fixes bug 21420; bugfix on 0.2.4.11-alpha
  14992. o Minor bugfixes (code correctness):
  14993. - Repair a couple of (unreachable or harmless) cases of the risky
  14994. comparison-by-subtraction pattern that caused bug 21278.
  14995. - Remove a redundant check for the UseEntryGuards option from the
  14996. options_transition_affects_guards() function. Fixes bug 21492;
  14997. bugfix on 0.3.0.1-alpha.
  14998. o Minor bugfixes (directory mirrors):
  14999. - Allow relays to use directory mirrors without a DirPort: these
  15000. relays need to be contacted over their ORPorts using a begindir
  15001. connection. Fixes one case of bug 20711; bugfix on 0.2.8.2-alpha.
  15002. - Clarify the message logged when a remote relay is unexpectedly
  15003. missing an ORPort or DirPort: users were confusing this with a
  15004. local port. Fixes another case of bug 20711; bugfix
  15005. on 0.2.8.2-alpha.
  15006. o Minor bugfixes (guards):
  15007. - Don't warn about a missing guard state on timeout-measurement
  15008. circuits: they aren't supposed to be using guards. Fixes an
  15009. instance of bug 21007; bugfix on 0.3.0.1-alpha.
  15010. - Silence a BUG() warning when attempting to use a guard whose
  15011. descriptor we don't know, and make this scenario less likely to
  15012. happen. Fixes bug 21415; bugfix on 0.3.0.1-alpha.
  15013. o Minor bugfixes (hidden service):
  15014. - Pass correct buffer length when encoding legacy ESTABLISH_INTRO
  15015. cells. Previously, we were using sizeof() on a pointer, instead of
  15016. the real destination buffer. Fortunately, that value was only used
  15017. to double-check that there was enough room--which was already
  15018. enforced elsewhere. Fixes bug 21553; bugfix on 0.3.0.1-alpha.
  15019. o Minor bugfixes (testing):
  15020. - Fix Raspbian build issues related to missing socket errno in
  15021. test_util.c. Fixes bug 21116; bugfix on 0.2.8.2. Patch
  15022. by "hein".
  15023. - Rename "make fuzz" to "make test-fuzz-corpora", since it doesn't
  15024. actually fuzz anything. Fixes bug 21447; bugfix on 0.3.0.3-alpha.
  15025. - Use bash in src/test/test-network.sh. This ensures we reliably
  15026. call chutney's newer tools/test-network.sh when available. Fixes
  15027. bug 21562; bugfix on 0.2.9.1-alpha.
  15028. o Documentation:
  15029. - Small fixes to the fuzzing documentation. Closes ticket 21472.
  15030. Changes in version 0.2.9.10 - 2017-03-01
  15031. Tor 0.2.9.10 backports a security fix from later Tor release. It also
  15032. includes fixes for some major issues affecting directory authorities,
  15033. LibreSSL compatibility, and IPv6 correctness.
  15034. The Tor 0.2.9.x release series is now marked as a long-term-support
  15035. series. We intend to backport security fixes to 0.2.9.x until at
  15036. least January of 2020.
  15037. o Major bugfixes (directory authority, 0.3.0.3-alpha):
  15038. - During voting, when marking a relay as a probable sybil, do not
  15039. clear its BadExit flag: sybils can still be bad in other ways
  15040. too. (We still clear the other flags.) Fixes bug 21108; bugfix
  15041. on 0.2.0.13-alpha.
  15042. o Major bugfixes (IPv6 Exits, backport from 0.3.0.3-alpha):
  15043. - Stop rejecting all IPv6 traffic on Exits whose exit policy rejects
  15044. any IPv6 addresses. Instead, only reject a port over IPv6 if the
  15045. exit policy rejects that port on more than an IPv6 /16 of
  15046. addresses. This bug was made worse by 17027 in 0.2.8.1-alpha,
  15047. which rejected a relay's own IPv6 address by default. Fixes bug
  15048. 21357; bugfix on commit 004f3f4e53 in 0.2.4.7-alpha.
  15049. o Major bugfixes (parsing, also in 0.3.0.4-rc):
  15050. - Fix an integer underflow bug when comparing malformed Tor
  15051. versions. This bug could crash Tor when built with
  15052. --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
  15053. 0.2.9.8, which were built with -ftrapv by default. In other cases
  15054. it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
  15055. on 0.0.8pre1. Found by OSS-Fuzz.
  15056. o Minor features (directory authorities, also in 0.3.0.4-rc):
  15057. - Directory authorities now reject descriptors that claim to be
  15058. malformed versions of Tor. Helps prevent exploitation of
  15059. bug 21278.
  15060. - Reject version numbers with components that exceed INT32_MAX.
  15061. Otherwise 32-bit and 64-bit platforms would behave inconsistently.
  15062. Fixes bug 21450; bugfix on 0.0.8pre1.
  15063. o Minor features (geoip):
  15064. - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
  15065. Country database.
  15066. o Minor features (portability, compilation, backport from 0.3.0.3-alpha):
  15067. - Autoconf now checks to determine if OpenSSL structures are opaque,
  15068. instead of explicitly checking for OpenSSL version numbers. Part
  15069. of ticket 21359.
  15070. - Support building with recent LibreSSL code that uses opaque
  15071. structures. Closes ticket 21359.
  15072. o Minor bugfixes (code correctness, also in 0.3.0.4-rc):
  15073. - Repair a couple of (unreachable or harmless) cases of the risky
  15074. comparison-by-subtraction pattern that caused bug 21278.
  15075. o Minor bugfixes (tor-resolve, backport from 0.3.0.3-alpha):
  15076. - The tor-resolve command line tool now rejects hostnames over 255
  15077. characters in length. Previously, it would silently truncate them,
  15078. which could lead to bugs. Fixes bug 21280; bugfix on 0.0.9pre5.
  15079. Patch by "junglefowl".
  15080. Changes in version 0.3.0.3-alpha - 2017-02-03
  15081. Tor 0.3.0.3-alpha fixes a few significant bugs introduced over the
  15082. 0.3.0.x development series, including some that could cause
  15083. authorities to behave badly. There is also a fix for a longstanding
  15084. bug that could prevent IPv6 exits from working. Tor 0.3.0.3-alpha also
  15085. includes some smaller features and bugfixes.
  15086. The Tor 0.3.0.x release series is now in patch-freeze: no additional
  15087. features will be considered for inclusion in 0.3.0.x. We suspect that
  15088. some bugs will probably remain, however, and we encourage people to
  15089. test this release.
  15090. o Major bugfixes (directory authority):
  15091. - During voting, when marking a relay as a probable sybil, do not
  15092. clear its BadExit flag: sybils can still be bad in other ways
  15093. too. (We still clear the other flags.) Fixes bug 21108; bugfix
  15094. on 0.2.0.13-alpha.
  15095. - When deciding whether we have just found a router to be reachable,
  15096. do not penalize it for not having performed an Ed25519 link
  15097. handshake if it does not claim to support an Ed25519 handshake.
  15098. Previously, we would treat such relays as non-running. Fixes bug
  15099. 21107; bugfix on 0.3.0.1-alpha.
  15100. o Major bugfixes (entry guards):
  15101. - Stop trying to build circuits through entry guards for which we
  15102. have no descriptor. Also, stop crashing in the case that we *do*
  15103. accidentally try to build a circuit in such a state. Fixes bug
  15104. 21242; bugfix on 0.3.0.1-alpha.
  15105. o Major bugfixes (IPv6 Exits):
  15106. - Stop rejecting all IPv6 traffic on Exits whose exit policy rejects
  15107. any IPv6 addresses. Instead, only reject a port over IPv6 if the
  15108. exit policy rejects that port on more than an IPv6 /16 of
  15109. addresses. This bug was made worse by 17027 in 0.2.8.1-alpha,
  15110. which rejected a relay's own IPv6 address by default. Fixes bug
  15111. 21357; bugfix on commit 004f3f4e53 in 0.2.4.7-alpha.
  15112. o Minor feature (client):
  15113. - Enable IPv6 traffic on the SocksPort by default. To disable this,
  15114. a user will have to specify "NoIPv6Traffic". Closes ticket 21269.
  15115. o Minor feature (fallback scripts):
  15116. - Add a check_existing mode to updateFallbackDirs.py, which checks
  15117. if fallbacks in the hard-coded list are working. Closes ticket
  15118. 20174. Patch by haxxpop.
  15119. o Minor features (ciphersuite selection):
  15120. - Clients now advertise a list of ciphersuites closer to the ones
  15121. preferred by Firefox. Closes part of ticket 15426.
  15122. - Allow relays to accept a wider range of ciphersuites, including
  15123. chacha20-poly1305 and AES-CCM. Closes the other part of 15426.
  15124. o Minor features (controller, configuration):
  15125. - Each of the *Port options, such as SocksPort, ORPort, ControlPort,
  15126. and so on, now comes with a __*Port variant that will not be saved
  15127. to the torrc file by the controller's SAVECONF command. This
  15128. change allows TorBrowser to set up a single-use domain socket for
  15129. each time it launches Tor. Closes ticket 20956.
  15130. - The GETCONF command can now query options that may only be
  15131. meaningful in context-sensitive lists. This allows the controller
  15132. to query the mixed SocksPort/__SocksPort style options introduced
  15133. in feature 20956. Implements ticket 21300.
  15134. o Minor features (portability, compilation):
  15135. - Autoconf now checks to determine if OpenSSL structures are opaque,
  15136. instead of explicitly checking for OpenSSL version numbers. Part
  15137. of ticket 21359.
  15138. - Support building with recent LibreSSL code that uses opaque
  15139. structures. Closes ticket 21359.
  15140. o Minor features (relay):
  15141. - We now allow separation of exit and relay traffic to different
  15142. source IP addresses, using the OutboundBindAddressExit and
  15143. OutboundBindAddressOR options respectively. Closes ticket 17975.
  15144. Written by Michael Sonntag.
  15145. o Minor bugfix (logging):
  15146. - Don't recommend the use of Tor2web in non-anonymous mode.
  15147. Recommending Tor2web is a bad idea because the client loses all
  15148. anonymity. Tor2web should only be used in specific cases by users
  15149. who *know* and understand the issues. Fixes bug 21294; bugfix
  15150. on 0.2.9.3-alpha.
  15151. o Minor bugfixes (client):
  15152. - Always recover from failures in extend_info_from_node(), in an
  15153. attempt to prevent any recurrence of bug 21242. Fixes bug 21372;
  15154. bugfix on 0.2.3.1-alpha.
  15155. o Minor bugfixes (client, entry guards):
  15156. - Fix a bug warning (with backtrace) when we fail a channel that
  15157. circuits to fallback directories on it. Fixes bug 21128; bugfix
  15158. on 0.3.0.1-alpha.
  15159. - Fix a spurious bug warning (with backtrace) when removing an
  15160. expired entry guard. Fixes bug 21129; bugfix on 0.3.0.1-alpha.
  15161. - Fix a bug of the new guard algorithm where tor could stall for up
  15162. to 10 minutes before retrying a guard after a long period of no
  15163. network. Fixes bug 21052; bugfix on 0.3.0.1-alpha.
  15164. - Do not try to build circuits until we have descriptors for our
  15165. primary entry guards. Related to fix for bug 21242.
  15166. o Minor bugfixes (configure, autoconf):
  15167. - Rename the configure option --enable-expensive-hardening to
  15168. --enable-fragile-hardening. Expensive hardening makes the tor
  15169. daemon abort when some kinds of issues are detected. Thus, it
  15170. makes tor more at risk of remote crashes but safer against RCE or
  15171. heartbleed bug category. We now try to explain this issue in a
  15172. message from the configure script. Fixes bug 21290; bugfix
  15173. on 0.2.5.4-alpha.
  15174. o Minor bugfixes (controller):
  15175. - Restore the (deprecated) DROPGUARDS controller command. Fixes bug
  15176. 20824; bugfix on 0.3.0.1-alpha.
  15177. o Minor bugfixes (hidden service):
  15178. - Clean up the code for expiring intro points with no associated
  15179. circuits. It was causing, rarely, a service with some expiring
  15180. introduction points to not open enough additional introduction
  15181. points. Fixes part of bug 21302; bugfix on 0.2.7.2-alpha.
  15182. - Stop setting the torrc option HiddenServiceStatistics to "0" just
  15183. because we're not a bridge or relay. Instead, we preserve whatever
  15184. value the user set (or didn't set). Fixes bug 21150; bugfix
  15185. on 0.2.6.2-alpha.
  15186. - Resolve two possible underflows which could lead to creating and
  15187. closing a lot of introduction point circuits in a non-stop loop.
  15188. Fixes bug 21302; bugfix on 0.2.7.2-alpha.
  15189. o Minor bugfixes (portability):
  15190. - Use "OpenBSD" compiler macro instead of "OPENBSD" or "__OpenBSD__".
  15191. It is supported by OpenBSD itself, and also by most OpenBSD
  15192. variants (such as Bitrig). Fixes bug 20980; bugfix
  15193. on 0.1.2.1-alpha.
  15194. - When mapping a file of length greater than SIZE_MAX, do not
  15195. silently truncate its contents. This issue could occur on 32 bit
  15196. systems with large file support and files which are larger than 4
  15197. GB. Fixes bug 21134; bugfix on 0.3.0.1-alpha.
  15198. o Minor bugfixes (tor-resolve):
  15199. - The tor-resolve command line tool now rejects hostnames over 255
  15200. characters in length. Previously, it would silently truncate them,
  15201. which could lead to bugs. Fixes bug 21280; bugfix on 0.0.9pre5.
  15202. Patch by "junglefowl".
  15203. o Minor bugfixes (Windows services):
  15204. - Be sure to initialize the monotonic time subsystem before using
  15205. it, even when running as an NT service. Fixes bug 21356; bugfix
  15206. on 0.2.9.1-alpha.
  15207. Changes in version 0.3.0.2-alpha - 2017-01-23
  15208. Tor 0.3.0.2-alpha fixes a denial-of-service bug where an attacker could
  15209. cause relays and clients to crash, even if they were not built with
  15210. the --enable-expensive-hardening option. This bug affects all 0.2.9.x
  15211. versions, and also affects 0.3.0.1-alpha: all relays running an affected
  15212. version should upgrade.
  15213. Tor 0.3.0.2-alpha also improves how exit relays and clients handle DNS
  15214. time-to-live values, makes directory authorities enforce the 1-to-1
  15215. mapping of relay RSA identity keys to ED25519 identity keys, fixes a
  15216. client-side onion service reachability bug, does better at selecting
  15217. the set of fallback directories, and more.
  15218. o Major bugfixes (security, also in 0.2.9.9):
  15219. - Downgrade the "-ftrapv" option from "always on" to "only on when
  15220. --enable-expensive-hardening is provided." This hardening option, like
  15221. others, can turn survivable bugs into crashes--and having it on by
  15222. default made a (relatively harmless) integer overflow bug into a
  15223. denial-of-service bug. Fixes bug 21278 (TROVE-2017-001); bugfix on
  15224. 0.2.9.1-alpha.
  15225. o Major features (security):
  15226. - Change the algorithm used to decide DNS TTLs on client and server
  15227. side, to better resist DNS-based correlation attacks like the
  15228. DefecTor attack of Greschbach, Pulls, Roberts, Winter, and
  15229. Feamster. Now relays only return one of two possible DNS TTL
  15230. values, and clients are willing to believe DNS TTL values up to 3
  15231. hours long. Closes ticket 19769.
  15232. o Major features (directory authority, security):
  15233. - The default for AuthDirPinKeys is now 1: directory authorities
  15234. will reject relays where the RSA identity key matches a previously
  15235. seen value, but the Ed25519 key has changed. Closes ticket 18319.
  15236. o Major bugfixes (client, guard, crash):
  15237. - In circuit_get_global_origin_list(), return the actual list of
  15238. origin circuits. The previous version of this code returned the
  15239. list of all the circuits, and could have caused strange bugs,
  15240. including possible crashes. Fixes bug 21118; bugfix
  15241. on 0.3.0.1-alpha.
  15242. o Major bugfixes (client, onion service, also in 0.2.9.9):
  15243. - Fix a client-side onion service reachability bug, where multiple
  15244. socks requests to an onion service (or a single slow request)
  15245. could cause us to mistakenly mark some of the service's
  15246. introduction points as failed, and we cache that failure so
  15247. eventually we run out and can't reach the service. Also resolves a
  15248. mysterious "Remote server sent bogus reason code 65021" log
  15249. warning. The bug was introduced in ticket 17218, where we tried to
  15250. remember the circuit end reason as a uint16_t, which mangled
  15251. negative values. Partially fixes bug 21056 and fixes bug 20307;
  15252. bugfix on 0.2.8.1-alpha.
  15253. o Major bugfixes (DNS):
  15254. - Fix a bug that prevented exit nodes from caching DNS records for
  15255. more than 60 seconds. Fixes bug 19025; bugfix on 0.2.4.7-alpha.
  15256. o Minor features (controller):
  15257. - Add "GETINFO sr/current" and "GETINFO sr/previous" keys, to expose
  15258. shared-random values to the controller. Closes ticket 19925.
  15259. o Minor features (entry guards):
  15260. - Add UseEntryGuards to TEST_OPTIONS_DEFAULT_VALUES in order to not
  15261. break regression tests.
  15262. - Require UseEntryGuards when UseBridges is set, in order to make
  15263. sure bridges aren't bypassed. Resolves ticket 20502.
  15264. o Minor features (fallback directories):
  15265. - Select 200 fallback directories for each release. Closes
  15266. ticket 20881.
  15267. - Allow 3 fallback relays per operator, which is safe now that we
  15268. are choosing 200 fallback relays. Closes ticket 20912.
  15269. - Exclude relays affected by bug 20499 from the fallback list.
  15270. Exclude relays from the fallback list if they are running versions
  15271. known to be affected by bug 20499, or if in our tests they deliver
  15272. a stale consensus (i.e. one that expired more than 24 hours ago).
  15273. Closes ticket 20539.
  15274. - Reduce the minimum fallback bandwidth to 1 MByte/s. Part of
  15275. ticket 18828.
  15276. - Require fallback directories to have the same address and port for
  15277. 7 days (now that we have enough relays with this stability).
  15278. Relays whose OnionOO stability timer is reset on restart by bug
  15279. 18050 should upgrade to Tor 0.2.8.7 or later, which has a fix for
  15280. this issue. Closes ticket 20880; maintains short-term fix
  15281. in 0.2.8.2-alpha.
  15282. - Require fallbacks to have flags for 90% of the time (weighted
  15283. decaying average), rather than 95%. This allows at least 73% of
  15284. clients to bootstrap in the first 5 seconds without contacting an
  15285. authority. Part of ticket 18828.
  15286. - Annotate updateFallbackDirs.py with the bandwidth and consensus
  15287. weight for each candidate fallback. Closes ticket 20878.
  15288. - Make it easier to change the output sort order of fallbacks.
  15289. Closes ticket 20822.
  15290. - Display the relay fingerprint when downloading consensuses from
  15291. fallbacks. Closes ticket 20908.
  15292. o Minor features (geoip, also in 0.2.9.9):
  15293. - Update geoip and geoip6 to the January 4 2017 Maxmind GeoLite2
  15294. Country database.
  15295. o Minor features (next-gen onion service directories):
  15296. - Remove the "EnableOnionServicesV3" consensus parameter that we
  15297. introduced in 0.3.0.1-alpha: relays are now always willing to act
  15298. as v3 onion service directories. Resolves ticket 19899.
  15299. o Minor features (linting):
  15300. - Enhance the changes file linter to warn on Tor versions that are
  15301. prefixed with "tor-". Closes ticket 21096.
  15302. o Minor features (logging):
  15303. - In several places, describe unset ed25519 keys as "<unset>",
  15304. rather than the scary "AAAAAAAA...AAA". Closes ticket 21037.
  15305. o Minor bugfix (control protocol):
  15306. - The reply to a "GETINFO config/names" request via the control
  15307. protocol now spells the type "Dependent" correctly. This is a
  15308. breaking change in the control protocol. (The field seems to be
  15309. ignored by the most common known controllers.) Fixes bug 18146;
  15310. bugfix on 0.1.1.4-alpha.
  15311. o Minor bugfixes (bug resilience):
  15312. - Fix an unreachable size_t overflow in base64_decode(). Fixes bug
  15313. 19222; bugfix on 0.2.0.9-alpha. Found by Guido Vranken; fixed by
  15314. Hans Jerry Illikainen.
  15315. o Minor bugfixes (build):
  15316. - Replace obsolete Autoconf macros with their modern equivalent and
  15317. prevent similar issues in the future. Fixes bug 20990; bugfix
  15318. on 0.1.0.1-rc.
  15319. o Minor bugfixes (client, guards):
  15320. - Fix bug where Tor would think that there are circuits waiting for
  15321. better guards even though those circuits have been freed. Fixes
  15322. bug 21142; bugfix on 0.3.0.1-alpha.
  15323. o Minor bugfixes (config):
  15324. - Don't assert on startup when trying to get the options list and
  15325. LearnCircuitBuildTimeout is set to 0: we are currently parsing the
  15326. options so of course they aren't ready yet. Fixes bug 21062;
  15327. bugfix on 0.2.9.3-alpha.
  15328. o Minor bugfixes (controller):
  15329. - Make the GETINFO interface for inquiring about entry guards
  15330. support the new guards backend. Fixes bug 20823; bugfix
  15331. on 0.3.0.1-alpha.
  15332. o Minor bugfixes (dead code):
  15333. - Remove a redundant check for PidFile changes at runtime in
  15334. options_transition_allowed(): this check is already performed
  15335. regardless of whether the sandbox is active. Fixes bug 21123;
  15336. bugfix on 0.2.5.4-alpha.
  15337. o Minor bugfixes (documentation):
  15338. - Update the tor manual page to document every option that can not
  15339. be changed while tor is running. Fixes bug 21122.
  15340. o Minor bugfixes (fallback directories):
  15341. - Stop failing when a relay has no uptime data in
  15342. updateFallbackDirs.py. Fixes bug 20945; bugfix on 0.2.8.1-alpha.
  15343. - Avoid checking fallback candidates' DirPorts if they are down in
  15344. OnionOO. When a relay operator has multiple relays, this
  15345. prioritizes relays that are up over relays that are down. Fixes
  15346. bug 20926; bugfix on 0.2.8.3-alpha.
  15347. - Stop failing when OUTPUT_COMMENTS is True in updateFallbackDirs.py.
  15348. Fixes bug 20877; bugfix on 0.2.8.3-alpha.
  15349. o Minor bugfixes (guards, bootstrapping):
  15350. - When connecting to a directory guard during bootstrap, do not mark
  15351. the guard as successful until we receive a good-looking directory
  15352. response from it. Fixes bug 20974; bugfix on 0.3.0.1-alpha.
  15353. o Minor bugfixes (onion services):
  15354. - Fix the config reload pruning of old vs new services so it
  15355. actually works when both ephemeral and non-ephemeral services are
  15356. configured. Fixes bug 21054; bugfix on 0.3.0.1-alpha.
  15357. - Allow the number of introduction points to be as low as 0, rather
  15358. than as low as 3. Fixes bug 21033; bugfix on 0.2.7.2-alpha.
  15359. o Minor bugfixes (IPv6):
  15360. - Make IPv6-using clients try harder to find an IPv6 directory
  15361. server. Fixes bug 20999; bugfix on 0.2.8.2-alpha.
  15362. - When IPv6 addresses have not been downloaded yet (microdesc
  15363. consensus documents don't list relay IPv6 addresses), use hard-
  15364. coded addresses for authorities, fallbacks, and configured
  15365. bridges. Now IPv6-only clients can use microdescriptors. Fixes bug
  15366. 20996; bugfix on b167e82 from 19608 in 0.2.8.5-alpha.
  15367. o Minor bugfixes (memory leaks):
  15368. - Fix a memory leak when configuring hidden services. Fixes bug
  15369. 20987; bugfix on 0.3.0.1-alpha.
  15370. o Minor bugfixes (portability, also in 0.2.9.9):
  15371. - Avoid crashing when Tor is built using headers that contain
  15372. CLOCK_MONOTONIC_COARSE, but then tries to run on an older kernel
  15373. without CLOCK_MONOTONIC_COARSE. Fixes bug 21035; bugfix
  15374. on 0.2.9.1-alpha.
  15375. - Fix Libevent detection on platforms without Libevent 1 headers
  15376. installed. Fixes bug 21051; bugfix on 0.2.9.1-alpha.
  15377. o Minor bugfixes (relay):
  15378. - Honor DataDirectoryGroupReadable when tor is a relay. Previously,
  15379. initializing the keys would reset the DataDirectory to 0700
  15380. instead of 0750 even if DataDirectoryGroupReadable was set to 1.
  15381. Fixes bug 19953; bugfix on 0.0.2pre16. Patch by "redfish".
  15382. o Minor bugfixes (testing):
  15383. - Remove undefined behavior from the backtrace generator by removing
  15384. its signal handler. Fixes bug 21026; bugfix on 0.2.5.2-alpha.
  15385. o Minor bugfixes (unit tests):
  15386. - Allow the unit tests to pass even when DNS lookups of bogus
  15387. addresses do not fail as expected. Fixes bug 20862 and 20863;
  15388. bugfix on unit tests introduced in 0.2.8.1-alpha
  15389. through 0.2.9.4-alpha.
  15390. o Code simplification and refactoring:
  15391. - Refactor code to manipulate global_origin_circuit_list into
  15392. separate functions. Closes ticket 20921.
  15393. o Documentation (formatting):
  15394. - Clean up formatting of tor.1 man page and HTML doc, where <pre>
  15395. blocks were incorrectly appearing. Closes ticket 20885.
  15396. o Documentation (man page):
  15397. - Clarify many options in tor.1 and add some min/max values for
  15398. HiddenService options. Closes ticket 21058.
  15399. Changes in version 0.2.9.9 - 2017-01-23
  15400. Tor 0.2.9.9 fixes a denial-of-service bug where an attacker could
  15401. cause relays and clients to crash, even if they were not built with
  15402. the --enable-expensive-hardening option. This bug affects all 0.2.9.x
  15403. versions, and also affects 0.3.0.1-alpha: all relays running an affected
  15404. version should upgrade.
  15405. This release also resolves a client-side onion service reachability
  15406. bug, and resolves a pair of small portability issues.
  15407. o Major bugfixes (security):
  15408. - Downgrade the "-ftrapv" option from "always on" to "only on when
  15409. --enable-expensive-hardening is provided." This hardening option,
  15410. like others, can turn survivable bugs into crashes -- and having
  15411. it on by default made a (relatively harmless) integer overflow bug
  15412. into a denial-of-service bug. Fixes bug 21278 (TROVE-2017-001);
  15413. bugfix on 0.2.9.1-alpha.
  15414. o Major bugfixes (client, onion service):
  15415. - Fix a client-side onion service reachability bug, where multiple
  15416. socks requests to an onion service (or a single slow request)
  15417. could cause us to mistakenly mark some of the service's
  15418. introduction points as failed, and we cache that failure so
  15419. eventually we run out and can't reach the service. Also resolves a
  15420. mysterious "Remote server sent bogus reason code 65021" log
  15421. warning. The bug was introduced in ticket 17218, where we tried to
  15422. remember the circuit end reason as a uint16_t, which mangled
  15423. negative values. Partially fixes bug 21056 and fixes bug 20307;
  15424. bugfix on 0.2.8.1-alpha.
  15425. o Minor features (geoip):
  15426. - Update geoip and geoip6 to the January 4 2017 Maxmind GeoLite2
  15427. Country database.
  15428. o Minor bugfixes (portability):
  15429. - Avoid crashing when Tor is built using headers that contain
  15430. CLOCK_MONOTONIC_COARSE, but then tries to run on an older kernel
  15431. without CLOCK_MONOTONIC_COARSE. Fixes bug 21035; bugfix
  15432. on 0.2.9.1-alpha.
  15433. - Fix Libevent detection on platforms without Libevent 1 headers
  15434. installed. Fixes bug 21051; bugfix on 0.2.9.1-alpha.
  15435. Changes in version 0.3.0.1-alpha - 2016-12-19
  15436. Tor 0.3.0.1-alpha is the first alpha release in the 0.3.0 development
  15437. series. It strengthens Tor's link and circuit handshakes by
  15438. identifying relays by their Ed25519 keys, improves the algorithm that
  15439. clients use to choose and maintain their list of guards, and includes
  15440. additional backend support for the next-generation hidden service
  15441. design. It also contains numerous other small features and
  15442. improvements to security, correctness, and performance.
  15443. Below are the changes since 0.2.9.8.
  15444. o Major features (guard selection algorithm):
  15445. - Tor's guard selection algorithm has been redesigned from the
  15446. ground up, to better support unreliable networks and restrictive
  15447. sets of entry nodes, and to better resist guard-capture attacks by
  15448. hostile local networks. Implements proposal 271; closes
  15449. ticket 19877.
  15450. o Major features (next-generation hidden services):
  15451. - Relays can now handle v3 ESTABLISH_INTRO cells as specified by
  15452. prop224 aka "Next Generation Hidden Services". Service and clients
  15453. don't use this functionality yet. Closes ticket 19043. Based on
  15454. initial code by Alec Heifetz.
  15455. - Relays now support the HSDir version 3 protocol, so that they can
  15456. can store and serve v3 descriptors. This is part of the next-
  15457. generation onion service work detailed in proposal 224. Closes
  15458. ticket 17238.
  15459. o Major features (protocol, ed25519 identity keys):
  15460. - Relays now use Ed25519 to prove their Ed25519 identities and to
  15461. one another, and to clients. This algorithm is faster and more
  15462. secure than the RSA-based handshake we've been doing until now.
  15463. Implements the second big part of proposal 220; Closes
  15464. ticket 15055.
  15465. - Clients now support including Ed25519 identity keys in the EXTEND2
  15466. cells they generate. By default, this is controlled by a consensus
  15467. parameter, currently disabled. You can turn this feature on for
  15468. testing by setting ExtendByEd25519ID in your configuration. This
  15469. might make your traffic appear different than the traffic
  15470. generated by other users, however. Implements part of ticket
  15471. 15056; part of proposal 220.
  15472. - Relays now understand requests to extend to other relays by their
  15473. Ed25519 identity keys. When an Ed25519 identity key is included in
  15474. an EXTEND2 cell, the relay will only extend the circuit if the
  15475. other relay can prove ownership of that identity. Implements part
  15476. of ticket 15056; part of proposal 220.
  15477. o Major bugfixes (scheduler):
  15478. - Actually compare circuit policies in ewma_cmp_cmux(). This bug
  15479. caused the channel scheduler to behave more or less randomly,
  15480. rather than preferring channels with higher-priority circuits.
  15481. Fixes bug 20459; bugfix on 0.2.6.2-alpha.
  15482. o Minor features (controller):
  15483. - When HSFETCH arguments cannot be parsed, say "Invalid argument"
  15484. rather than "unrecognized." Closes ticket 20389; patch from
  15485. Ivan Markin.
  15486. o Minor features (diagnostic, directory client):
  15487. - Warn when we find an unexpected inconsistency in directory
  15488. download status objects. Prevents some negative consequences of
  15489. bug 20593.
  15490. o Minor features (directory authority):
  15491. - Add a new authority-only AuthDirTestEd25519LinkKeys option (on by
  15492. default) to control whether authorities should try to probe relays
  15493. by their Ed25519 link keys. This option will go away in a few
  15494. releases--unless we encounter major trouble in our ed25519 link
  15495. protocol rollout, in which case it will serve as a safety option.
  15496. o Minor features (directory cache):
  15497. - Relays and bridges will now refuse to serve the consensus they
  15498. have if they know it is too old for a client to use. Closes
  15499. ticket 20511.
  15500. o Minor features (ed25519 link handshake):
  15501. - Advertise support for the ed25519 link handshake using the
  15502. subprotocol-versions mechanism, so that clients can tell which
  15503. relays can identity themselves by Ed25519 ID. Closes ticket 20552.
  15504. o Minor features (fingerprinting resistance, authentication):
  15505. - Extend the length of RSA keys used for TLS link authentication to
  15506. 2048 bits. (These weren't used for forward secrecy; for forward
  15507. secrecy, we used P256.) Closes ticket 13752.
  15508. o Minor features (infrastructure):
  15509. - Implement smartlist_add_strdup() function. Replaces the use of
  15510. smartlist_add(sl, tor_strdup(str)). Closes ticket 20048.
  15511. o Minor bugfixes (client):
  15512. - When clients that use bridges start up with a cached consensus on
  15513. disk, they were ignoring it and downloading a new one. Now they
  15514. use the cached one. Fixes bug 20269; bugfix on 0.2.3.12-alpha.
  15515. o Minor bugfixes (configuration):
  15516. - Accept non-space whitespace characters after the severity level in
  15517. the `Log` option. Fixes bug 19965; bugfix on 0.2.1.1-alpha.
  15518. - Support "TByte" and "TBytes" units in options given in bytes.
  15519. "TB", "terabyte(s)", "TBit(s)" and "terabit(s)" were already
  15520. supported. Fixes bug 20622; bugfix on 0.2.0.14-alpha.
  15521. o Minor bugfixes (consensus weight):
  15522. - Add new consensus method that initializes bw weights to 1 instead
  15523. of 0. This prevents a zero weight from making it all the way to
  15524. the end (happens in small testing networks) and causing an error.
  15525. Fixes bug 14881; bugfix on 0.2.2.17-alpha.
  15526. o Minor bugfixes (descriptors):
  15527. - Correctly recognise downloaded full descriptors as valid, even
  15528. when using microdescriptors as circuits. This affects clients with
  15529. FetchUselessDescriptors set, and may affect directory authorities.
  15530. Fixes bug 20839; bugfix on 0.2.3.2-alpha.
  15531. o Minor bugfixes (directory system):
  15532. - Download all consensus flavors, descriptors, and authority
  15533. certificates when FetchUselessDescriptors is set, regardless of
  15534. whether tor is a directory cache or not. Fixes bug 20667; bugfix
  15535. on all recent tor versions.
  15536. - Bridges and relays now use microdescriptors (like clients do)
  15537. rather than old-style router descriptors. Now bridges will blend
  15538. in with clients in terms of the circuits they build. Fixes bug
  15539. 6769; bugfix on 0.2.3.2-alpha.
  15540. o Minor bugfixes (ed25519 certificates):
  15541. - Correctly interpret ed25519 certificates that would expire some
  15542. time after 19 Jan 2038. Fixes bug 20027; bugfix on 0.2.7.2-alpha.
  15543. o Minor bugfixes (hidden services):
  15544. - Stop ignoring misconfigured hidden services. Instead, refuse to
  15545. start tor until the misconfigurations have been corrected. Fixes
  15546. bug 20559; bugfix on multiple commits in 0.2.7.1-alpha
  15547. and earlier.
  15548. o Minor bugfixes (memory leak at exit):
  15549. - Fix a small harmless memory leak at exit of the previously unused
  15550. RSA->Ed identity cross-certificate. Fixes bug 17779; bugfix
  15551. on 0.2.7.2-alpha.
  15552. o Minor bugfixes (util):
  15553. - When finishing writing a file to disk, if we were about to replace
  15554. the file with the temporary file created before and we fail to
  15555. replace it, remove the temporary file so it doesn't stay on disk.
  15556. Fixes bug 20646; bugfix on 0.2.0.7-alpha. Patch by fk.
  15557. o Minor bugfixes (Windows):
  15558. - Check for getpagesize before using it to mmap files. This fixes
  15559. compilation in some MinGW environments. Fixes bug 20530; bugfix on
  15560. 0.1.2.1-alpha. Reported by "ice".
  15561. o Code simplification and refactoring:
  15562. - Abolish all global guard context in entrynodes.c; replace with new
  15563. guard_selection_t structure as preparation for proposal 271.
  15564. Closes ticket 19858.
  15565. - Introduce rend_service_is_ephemeral() that tells if given onion
  15566. service is ephemeral. Replace unclear NULL-checkings for service
  15567. directory with this function. Closes ticket 20526.
  15568. - Extract magic numbers in circuituse.c into defined variables.
  15569. - Refactor circuit_is_available_for_use to remove unnecessary check.
  15570. - Refactor circuit_predict_and_launch_new for readability and
  15571. testability. Closes ticket 18873.
  15572. - Refactor large if statement in purpose_needs_anonymity to use
  15573. switch statement instead. Closes part of ticket 20077.
  15574. - Refactor the hashing API to return negative values for errors, as
  15575. is done as throughout the codebase. Closes ticket 20717.
  15576. - Remove data structures that were used to index or_connection
  15577. objects by their RSA identity digests. These structures are fully
  15578. redundant with the similar structures used in the
  15579. channel abstraction.
  15580. - Remove duplicate code in the channel_write_*cell() functions.
  15581. Closes ticket 13827; patch from Pingl.
  15582. - Remove redundant behavior of is_sensitive_dir_purpose, refactor to
  15583. use only purpose_needs_anonymity. Closes part of ticket 20077.
  15584. - The code to generate and parse EXTEND and EXTEND2 cells has been
  15585. replaced with code automatically generated by the
  15586. "trunnel" utility.
  15587. o Documentation:
  15588. - Include the "TBits" unit in Tor's man page. Fixes part of bug
  15589. 20622; bugfix on 0.2.5.1-alpha.
  15590. - Change '1' to 'weight_scale' in consensus bw weights calculation
  15591. comments, as that is reality. Closes ticket 20273. Patch
  15592. from pastly.
  15593. - Correct the value for AuthDirGuardBWGuarantee in the manpage, from
  15594. 250 KBytes to 2 MBytes. Fixes bug 20435; bugfix
  15595. on 0.2.5.6-alpha.
  15596. - Stop the man page from incorrectly stating that HiddenServiceDir
  15597. must already exist. Fixes 20486.
  15598. - Clarify that when ClientRejectInternalAddresses is enabled (which
  15599. is the default), multicast DNS hostnames for machines on the local
  15600. network (of the form *.local) are also rejected. Closes
  15601. ticket 17070.
  15602. o Removed features:
  15603. - The AuthDirMaxServersPerAuthAddr option no longer exists: The same
  15604. limit for relays running on a single IP applies to authority IP
  15605. addresses as well as to non-authority IP addresses. Closes
  15606. ticket 20960.
  15607. - The UseDirectoryGuards torrc option no longer exists: all users
  15608. that use entry guards will also use directory guards. Related to
  15609. proposal 271; implements part of ticket 20831.
  15610. o Testing:
  15611. - New unit tests for tor_htonll(). Closes ticket 19563. Patch
  15612. from "overcaffeinated".
  15613. - Perform the coding style checks when running the tests and fail
  15614. when coding style violations are found. Closes ticket 5500.
  15615. - Add tests for networkstatus_compute_bw_weights_v10.
  15616. - Add unit tests circuit_predict_and_launch_new.
  15617. - Extract dummy_origin_circuit_new so it can be used by other
  15618. test functions.
  15619. Changes in version 0.2.8.12 - 2016-12-19
  15620. Tor 0.2.8.12 backports a fix for a medium-severity issue (bug 21018
  15621. below) where Tor clients could crash when attempting to visit a
  15622. hostile hidden service. Clients are recommended to upgrade as packages
  15623. become available for their systems.
  15624. It also includes an updated list of fallback directories, backported
  15625. from 0.2.9.
  15626. Now that the Tor 0.2.9 series is stable, only major bugfixes will be
  15627. backported to 0.2.8 in the future.
  15628. o Major bugfixes (parsing, security, backported from 0.2.9.8):
  15629. - Fix a bug in parsing that could cause clients to read a single
  15630. byte past the end of an allocated region. This bug could be used
  15631. to cause hardened clients (built with --enable-expensive-hardening)
  15632. to crash if they tried to visit a hostile hidden service. Non-
  15633. hardened clients are only affected depending on the details of
  15634. their platform's memory allocator. Fixes bug 21018; bugfix on
  15635. 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
  15636. 2016-12-002 and as CVE-2016-1254.
  15637. o Minor features (fallback directory list, backported from 0.2.9.8):
  15638. - Replace the 81 remaining fallbacks of the 100 originally
  15639. introduced in Tor 0.2.8.3-alpha in March 2016, with a list of 177
  15640. fallbacks (123 new, 54 existing, 27 removed) generated in December
  15641. 2016. Resolves ticket 20170.
  15642. o Minor features (geoip, backported from 0.2.9.7-rc):
  15643. - Update geoip and geoip6 to the December 7 2016 Maxmind GeoLite2
  15644. Country database.
  15645. Changes in version 0.2.9.8 - 2016-12-19
  15646. Tor 0.2.9.8 is the first stable release of the Tor 0.2.9 series.
  15647. The Tor 0.2.9 series makes mandatory a number of security features
  15648. that were formerly optional. It includes support for a new shared-
  15649. randomness protocol that will form the basis for next generation
  15650. hidden services, includes a single-hop hidden service mode for
  15651. optimizing .onion services that don't actually want to be hidden,
  15652. tries harder not to overload the directory authorities with excessive
  15653. downloads, and supports a better protocol versioning scheme for
  15654. improved compatibility with other implementations of the Tor protocol.
  15655. And of course, there are numerous other bugfixes and improvements.
  15656. This release also includes a fix for a medium-severity issue (bug
  15657. 21018 below) where Tor clients could crash when attempting to visit a
  15658. hostile hidden service. Clients are recommended to upgrade as packages
  15659. become available for their systems.
  15660. Below are the changes since 0.2.9.7-rc. For a list of all changes
  15661. since 0.2.8, see the ReleaseNotes file.
  15662. o Major bugfixes (parsing, security):
  15663. - Fix a bug in parsing that could cause clients to read a single
  15664. byte past the end of an allocated region. This bug could be used
  15665. to cause hardened clients (built with --enable-expensive-hardening)
  15666. to crash if they tried to visit a hostile hidden service. Non-
  15667. hardened clients are only affected depending on the details of
  15668. their platform's memory allocator. Fixes bug 21018; bugfix on
  15669. 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
  15670. 2016-12-002 and as CVE-2016-1254.
  15671. o Minor features (fallback directory list):
  15672. - Replace the 81 remaining fallbacks of the 100 originally
  15673. introduced in Tor 0.2.8.3-alpha in March 2016, with a list of 177
  15674. fallbacks (123 new, 54 existing, 27 removed) generated in December
  15675. 2016. Resolves ticket 20170.
  15676. Changes in version 0.2.9.7-rc - 2016-12-12
  15677. Tor 0.2.9.7-rc fixes a few small bugs remaining in Tor 0.2.9.6-rc,
  15678. including a few that had prevented tests from passing on
  15679. some platforms.
  15680. o Minor features (geoip):
  15681. - Update geoip and geoip6 to the December 7 2016 Maxmind GeoLite2
  15682. Country database.
  15683. o Minor bugfix (build):
  15684. - The current Git revision when building from a local repository is
  15685. now detected correctly when using git worktrees. Fixes bug 20492;
  15686. bugfix on 0.2.3.9-alpha.
  15687. o Minor bugfixes (directory authority):
  15688. - When computing old Tor protocol line version in protover, we were
  15689. looking at 0.2.7.5 twice instead of a specific case for
  15690. 0.2.9.1-alpha. Fixes bug 20810; bugfix on 0.2.9.4-alpha.
  15691. o Minor bugfixes (download scheduling):
  15692. - Resolve a "bug" warning when considering a download schedule whose
  15693. delay had approached INT_MAX. Fixes 20875; bugfix on 0.2.9.5-alpha.
  15694. o Minor bugfixes (logging):
  15695. - Downgrade a harmless log message about the
  15696. pending_entry_connections list from "warn" to "info". Mitigates
  15697. bug 19926.
  15698. o Minor bugfixes (memory leak):
  15699. - Fix a small memory leak when receiving AF_UNIX connections on a
  15700. SocksPort. Fixes bug 20716; bugfix on 0.2.6.3-alpha.
  15701. - When moving a signed descriptor object from a source to an
  15702. existing destination, free the allocated memory inside that
  15703. destination object. Fixes bug 20715; bugfix on 0.2.8.3-alpha.
  15704. o Minor bugfixes (memory leak, use-after-free, linux seccomp2 sandbox):
  15705. - Fix a memory leak and use-after-free error when removing entries
  15706. from the sandbox's getaddrinfo() cache. Fixes bug 20710; bugfix on
  15707. 0.2.5.5-alpha. Patch from "cypherpunks".
  15708. o Minor bugfixes (portability):
  15709. - Use the correct spelling of MAC_OS_X_VERSION_10_12 on configure.ac
  15710. Fixes bug 20935; bugfix on 0.2.9.6-rc.
  15711. o Minor bugfixes (unit tests):
  15712. - Stop expecting NetBSD unit tests to report success for ipfw. Part
  15713. of a fix for bug 19960; bugfix on 0.2.9.5-alpha.
  15714. - Fix tolerances in unit tests for monotonic time comparisons
  15715. between nanoseconds and microseconds. Previously, we accepted a 10
  15716. us difference only, which is not realistic on every platform's
  15717. clock_gettime(). Fixes bug 19974; bugfix on 0.2.9.1-alpha.
  15718. - Remove a double-free in the single onion service unit test. Stop
  15719. ignoring a return value. Make future changes less error-prone.
  15720. Fixes bug 20864; bugfix on 0.2.9.6-rc.
  15721. Changes in version 0.2.8.11 - 2016-12-08
  15722. Tor 0.2.8.11 backports fixes for additional portability issues that
  15723. could prevent Tor from building correctly on OSX Sierra, or with
  15724. OpenSSL 1.1. Affected users should upgrade; others can safely stay
  15725. with 0.2.8.10.
  15726. o Minor bugfixes (portability):
  15727. - Avoid compilation errors when building on OSX Sierra. Sierra began
  15728. to support the getentropy() and clock_gettime() APIs, but created
  15729. a few problems in doing so. Tor 0.2.9 has a more thorough set of
  15730. workarounds; in 0.2.8, we are just using the /dev/urandom and mach
  15731. monotonic time interfaces. Fixes bug 20865. Bugfix
  15732. on 0.2.8.1-alpha.
  15733. o Minor bugfixes (portability, backport from 0.2.9.5-alpha):
  15734. - Fix compilation with OpenSSL 1.1 and less commonly-used CPU
  15735. architectures. Closes ticket 20588.
  15736. Changes in version 0.2.8.10 - 2016-12-02
  15737. Tor 0.2.8.10 backports a fix for a bug that would sometimes make clients
  15738. unusable after they left standby mode. It also backports fixes for
  15739. a few portability issues and a small but problematic memory leak.
  15740. o Major bugfixes (client reliability, backport from 0.2.9.5-alpha):
  15741. - When Tor leaves standby because of a new application request, open
  15742. circuits as needed to serve that request. Previously, we would
  15743. potentially wait a very long time. Fixes part of bug 19969; bugfix
  15744. on 0.2.8.1-alpha.
  15745. o Major bugfixes (client performance, backport from 0.2.9.5-alpha):
  15746. - Clients now respond to new application stream requests immediately
  15747. when they arrive, rather than waiting up to one second before
  15748. starting to handle them. Fixes part of bug 19969; bugfix
  15749. on 0.2.8.1-alpha.
  15750. o Minor bugfixes (portability, backport from 0.2.9.6-rc):
  15751. - Work around a bug in the OSX 10.12 SDK that would prevent us from
  15752. successfully targeting earlier versions of OSX. Resolves
  15753. ticket 20235.
  15754. o Minor bugfixes (portability, backport from 0.2.9.5-alpha):
  15755. - Fix implicit conversion warnings under OpenSSL 1.1. Fixes bug
  15756. 20551; bugfix on 0.2.1.1-alpha.
  15757. o Minor bugfixes (relay, backport from 0.2.9.5-alpha):
  15758. - Work around a memory leak in OpenSSL 1.1 when encoding public
  15759. keys. Fixes bug 20553; bugfix on 0.0.2pre8.
  15760. o Minor features (geoip):
  15761. - Update geoip and geoip6 to the November 3 2016 Maxmind GeoLite2
  15762. Country database.
  15763. Changes in version 0.2.9.6-rc - 2016-12-02
  15764. Tor 0.2.9.6-rc fixes a few remaining bugs found in the previous alpha
  15765. version. We hope that it will be ready to become stable soon, and we
  15766. encourage everyone to test this release. If no showstopper bugs are
  15767. found here, the next 0.2.9 release will be stable.
  15768. o Major bugfixes (relay, resolver, logging):
  15769. - For relays that don't know their own address, avoid attempting a
  15770. local hostname resolve for each descriptor we download. This
  15771. will cut down on the number of "Success: chose address 'x.x.x.x'"
  15772. log lines, and also avoid confusing clock jumps if the resolver
  15773. is slow. Fixes bugs 20423 and 20610; bugfix on 0.2.8.1-alpha.
  15774. o Minor bugfixes (client, fascistfirewall):
  15775. - Avoid spurious warnings when ReachableAddresses or FascistFirewall
  15776. is set. Fixes bug 20306; bugfix on 0.2.8.2-alpha.
  15777. o Minor bugfixes (hidden services):
  15778. - Stop ignoring the anonymity status of saved keys for hidden
  15779. services and single onion services when first starting tor.
  15780. Instead, refuse to start tor if any hidden service key has been
  15781. used in a different hidden service anonymity mode. Fixes bug
  15782. 20638; bugfix on 17178 in 0.2.9.3-alpha; reported by ahf.
  15783. o Minor bugfixes (portability):
  15784. - Work around a bug in the OSX 10.12 SDK that would prevent us from
  15785. successfully targeting earlier versions of OSX. Resolves
  15786. ticket 20235.
  15787. - Run correctly when built on Windows build environments that
  15788. require _vcsprintf(). Fixes bug 20560; bugfix on 0.2.2.11-alpha.
  15789. o Minor bugfixes (single onion services, Tor2web):
  15790. - Stop complaining about long-term one-hop circuits deliberately
  15791. created by single onion services and Tor2web. These log messages
  15792. are intended to diagnose issue 8387, which relates to circuits
  15793. hanging around forever for no reason. Fixes bug 20613; bugfix on
  15794. 0.2.9.1-alpha. Reported by "pastly".
  15795. o Minor bugfixes (unit tests):
  15796. - Stop spurious failures in the local interface address discovery
  15797. unit tests. Fixes bug 20634; bugfix on 0.2.8.1-alpha; patch by
  15798. Neel Chauhan.
  15799. o Documentation:
  15800. - Correct the minimum bandwidth value in torrc.sample, and queue a
  15801. corresponding change for torrc.minimal. Closes ticket 20085.
  15802. Changes in version 0.2.9.5-alpha - 2016-11-08
  15803. Tor 0.2.9.5-alpha fixes numerous bugs discovered in the previous alpha
  15804. version. We believe one or two probably remain, and we encourage
  15805. everyone to test this release.
  15806. o Major bugfixes (client performance):
  15807. - Clients now respond to new application stream requests immediately
  15808. when they arrive, rather than waiting up to one second before
  15809. starting to handle them. Fixes part of bug 19969; bugfix
  15810. on 0.2.8.1-alpha.
  15811. o Major bugfixes (client reliability):
  15812. - When Tor leaves standby because of a new application request, open
  15813. circuits as needed to serve that request. Previously, we would
  15814. potentially wait a very long time. Fixes part of bug 19969; bugfix
  15815. on 0.2.8.1-alpha.
  15816. o Major bugfixes (download scheduling):
  15817. - When using an exponential backoff schedule, do not give up on
  15818. downloading just because we have failed a bunch of times. Since
  15819. each delay is longer than the last, retrying indefinitely won't
  15820. hurt. Fixes bug 20536; bugfix on 0.2.9.1-alpha.
  15821. - If a consensus expires while we are waiting for certificates to
  15822. download, stop waiting for certificates.
  15823. - If we stop waiting for certificates less than a minute after we
  15824. started downloading them, do not consider the certificate download
  15825. failure a separate failure. Fixes bug 20533; bugfix
  15826. on 0.2.0.9-alpha.
  15827. - Remove the maximum delay on exponential-backoff scheduling. Since
  15828. we now allow an infinite number of failures (see ticket 20536), we
  15829. must now allow the time to grow longer on each failure. Fixes part
  15830. of bug 20534; bugfix on 0.2.9.1-alpha.
  15831. - Make our initial download delays closer to those from 0.2.8. Fixes
  15832. another part of bug 20534; bugfix on 0.2.9.1-alpha.
  15833. - When determining when to download a directory object, handle times
  15834. after 2038 if the operating system supports them. (Someday this
  15835. will be important!) Fixes bug 20587; bugfix on 0.2.8.1-alpha.
  15836. - When using exponential backoff in test networks, use a lower
  15837. exponent, so the delays do not vary as much. This helps test
  15838. networks bootstrap consistently. Fixes bug 20597; bugfix on 20499.
  15839. o Minor features (geoip):
  15840. - Update geoip and geoip6 to the November 3 2016 Maxmind GeoLite2
  15841. Country database.
  15842. o Minor bugfixes (client directory scheduling):
  15843. - Treat "relay too busy to answer request" as a failed request and a
  15844. reason to back off on our retry frequency. This is safe now that
  15845. exponential backoffs retry indefinitely, and avoids a bug where we
  15846. would reset our download schedule erroneously. Fixes bug 20593;
  15847. bugfix on 0.2.9.1-alpha.
  15848. o Minor bugfixes (client, logging):
  15849. - Remove a BUG warning in circuit_pick_extend_handshake(). Instead,
  15850. assume all nodes support EXTEND2. Use ntor whenever a key is
  15851. available. Fixes bug 20472; bugfix on 0.2.9.3-alpha.
  15852. - On DNSPort, stop logging a BUG warning on a failed hostname
  15853. lookup. Fixes bug 19869; bugfix on 0.2.9.1-alpha.
  15854. o Minor bugfixes (hidden services):
  15855. - When configuring hidden services, check every hidden service
  15856. directory's permissions. Previously, we only checked the last
  15857. hidden service. Fixes bug 20529; bugfix the work to fix 13942
  15858. in 0.2.6.2-alpha.
  15859. o Minor bugfixes (portability):
  15860. - Fix compilation with OpenSSL 1.1 and less commonly-used CPU
  15861. architectures. Closes ticket 20588.
  15862. - Use ECDHE ciphers instead of ECDH in tortls tests. LibreSSL has
  15863. removed the ECDH ciphers which caused the tests to fail on
  15864. platforms which use it. Fixes bug 20460; bugfix on 0.2.8.1-alpha.
  15865. - Fix implicit conversion warnings under OpenSSL 1.1. Fixes bug
  15866. 20551; bugfix on 0.2.1.1-alpha.
  15867. o Minor bugfixes (relay bootstrap):
  15868. - Ensure relays don't make multiple connections during bootstrap.
  15869. Fixes bug 20591; bugfix on 0.2.8.1-alpha.
  15870. o Minor bugfixes (relay):
  15871. - Work around a memory leak in OpenSSL 1.1 when encoding public
  15872. keys. Fixes bug 20553; bugfix on 0.0.2pre8.
  15873. - Avoid a small memory leak when informing worker threads about
  15874. rotated onion keys. Fixes bug 20401; bugfix on 0.2.6.3-alpha.
  15875. - Do not try to parallelize workers more than 16x without the user
  15876. explicitly configuring us to do so, even if we do detect more than
  15877. 16 CPU cores. Fixes bug 19968; bugfix on 0.2.3.1-alpha.
  15878. o Minor bugfixes (single onion services):
  15879. - Start correctly when creating a single onion service in a
  15880. directory that did not previously exist. Fixes bug 20484; bugfix
  15881. on 0.2.9.3-alpha.
  15882. o Minor bugfixes (testing):
  15883. - Avoid a unit test failure on systems with over 16 detectable CPU
  15884. cores. Fixes bug 19968; bugfix on 0.2.3.1-alpha.
  15885. o Documentation:
  15886. - Clarify that setting HiddenServiceNonAnonymousMode requires you to
  15887. also set "SOCKSPort 0". Fixes bug 20487; bugfix on 0.2.9.3-alpha.
  15888. - Module-level documentation for several more modules. Closes
  15889. tickets 19287 and 19290.
  15890. Changes in version 0.2.8.9 - 2016-10-17
  15891. Tor 0.2.8.9 backports a fix for a security hole in previous versions
  15892. of Tor that would allow a remote attacker to crash a Tor client,
  15893. hidden service, relay, or authority. All Tor users should upgrade to
  15894. this version, or to 0.2.9.4-alpha. Patches will be released for older
  15895. versions of Tor.
  15896. o Major features (security fixes, also in 0.2.9.4-alpha):
  15897. - Prevent a class of security bugs caused by treating the contents
  15898. of a buffer chunk as if they were a NUL-terminated string. At
  15899. least one such bug seems to be present in all currently used
  15900. versions of Tor, and would allow an attacker to remotely crash
  15901. most Tor instances, especially those compiled with extra compiler
  15902. hardening. With this defense in place, such bugs can't crash Tor,
  15903. though we should still fix them as they occur. Closes ticket
  15904. 20384 (TROVE-2016-10-001).
  15905. o Minor features (geoip):
  15906. - Update geoip and geoip6 to the October 4 2016 Maxmind GeoLite2
  15907. Country database.
  15908. Changes in version 0.2.9.4-alpha - 2016-10-17
  15909. Tor 0.2.9.4-alpha fixes a security hole in previous versions of Tor
  15910. that would allow a remote attacker to crash a Tor client, hidden
  15911. service, relay, or authority. All Tor users should upgrade to this
  15912. version, or to 0.2.8.9. Patches will be released for older versions
  15913. of Tor.
  15914. Tor 0.2.9.4-alpha also adds numerous small features and fix-ups to
  15915. previous versions of Tor, including the implementation of a feature to
  15916. future- proof the Tor ecosystem against protocol changes, some bug
  15917. fixes necessary for Tor Browser to use unix domain sockets correctly,
  15918. and several portability improvements. We anticipate that this will be
  15919. the last alpha in the Tor 0.2.9 series, and that the next release will
  15920. be a release candidate.
  15921. o Major features (security fixes):
  15922. - Prevent a class of security bugs caused by treating the contents
  15923. of a buffer chunk as if they were a NUL-terminated string. At
  15924. least one such bug seems to be present in all currently used
  15925. versions of Tor, and would allow an attacker to remotely crash
  15926. most Tor instances, especially those compiled with extra compiler
  15927. hardening. With this defense in place, such bugs can't crash Tor,
  15928. though we should still fix them as they occur. Closes ticket
  15929. 20384 (TROVE-2016-10-001).
  15930. o Major features (subprotocol versions):
  15931. - Tor directory authorities now vote on a set of recommended
  15932. subprotocol versions, and on a set of required subprotocol
  15933. versions. Clients and relays that lack support for a _required_
  15934. subprotocol version will not start; those that lack support for a
  15935. _recommended_ subprotocol version will warn the user to upgrade.
  15936. Closes ticket 19958; implements part of proposal 264.
  15937. - Tor now uses "subprotocol versions" to indicate compatibility.
  15938. Previously, versions of Tor looked at the declared Tor version of
  15939. a relay to tell whether they could use a given feature. Now, they
  15940. should be able to rely on its declared subprotocol versions. This
  15941. change allows compatible implementations of the Tor protocol(s) to
  15942. exist without pretending to be 100% bug-compatible with particular
  15943. releases of Tor itself. Closes ticket 19958; implements part of
  15944. proposal 264.
  15945. o Minor feature (fallback directories):
  15946. - Remove broken fallbacks from the hard-coded fallback directory
  15947. list. Closes ticket 20190; patch by teor.
  15948. o Minor features (client, directory):
  15949. - Since authorities now omit all routers that lack the Running and
  15950. Valid flags, we assume that any relay listed in the consensus must
  15951. have those flags. Closes ticket 20001; implements part of
  15952. proposal 272.
  15953. o Minor features (compilation, portability):
  15954. - Compile correctly on MacOS 10.12 (aka "Sierra"). Closes
  15955. ticket 20241.
  15956. o Minor features (development tools, etags):
  15957. - Teach the "make tags" Makefile target how to correctly find
  15958. "MOCK_IMPL" function definitions. Patch from nherring; closes
  15959. ticket 16869.
  15960. o Minor features (geoip):
  15961. - Update geoip and geoip6 to the October 4 2016 Maxmind GeoLite2
  15962. Country database.
  15963. o Minor features (unix domain sockets):
  15964. - When configuring a unix domain socket for a SocksPort,
  15965. ControlPort, or Hidden service, you can now wrap the address in
  15966. quotes, using C-style escapes inside the quotes. This allows unix
  15967. domain socket paths to contain spaces.
  15968. o Minor features (virtual addresses):
  15969. - Increase the maximum number of bits for the IPv6 virtual network
  15970. prefix from 16 to 104. In this way, the condition for address
  15971. allocation is less restrictive. Closes ticket 20151; feature
  15972. on 0.2.4.7-alpha.
  15973. o Minor bugfixes (address discovery):
  15974. - Stop reordering IP addresses returned by the OS. This makes it
  15975. more likely that Tor will guess the same relay IP address every
  15976. time. Fixes issue 20163; bugfix on 0.2.7.1-alpha, ticket 17027.
  15977. Reported by René Mayrhofer, patch by "cypherpunks".
  15978. o Minor bugfixes (client, unix domain sockets):
  15979. - Disable IsolateClientAddr when using AF_UNIX backed SocksPorts as
  15980. the client address is meaningless. Fixes bug 20261; bugfix
  15981. on 0.2.6.3-alpha.
  15982. o Minor bugfixes (compilation, OpenBSD):
  15983. - Detect Libevent2 functions correctly on systems that provide
  15984. libevent2, but where libevent1 is linked with -levent. Fixes bug
  15985. 19904; bugfix on 0.2.2.24-alpha. Patch from Rubiate.
  15986. o Minor bugfixes (configuration):
  15987. - When parsing quoted configuration values from the torrc file,
  15988. handle windows line endings correctly. Fixes bug 19167; bugfix on
  15989. 0.2.0.16-alpha. Patch from "Pingl".
  15990. o Minor bugfixes (getpass):
  15991. - Defensively fix a non-triggerable heap corruption at do_getpass()
  15992. to protect ourselves from mistakes in the future. Fixes bug
  15993. 19223; bugfix on 0.2.7.3-rc. Bug found by Guido Vranken, patch
  15994. by nherring.
  15995. o Minor bugfixes (hidden service):
  15996. - Allow hidden services to run on IPv6 addresses even when the
  15997. IPv6Exit option is not set. Fixes bug 18357; bugfix
  15998. on 0.2.4.7-alpha.
  15999. o Documentation:
  16000. - Add module-level internal documentation for 36 C files that
  16001. previously didn't have a high-level overview. Closes ticket #20385.
  16002. o Required libraries:
  16003. - When building with OpenSSL, Tor now requires version 1.0.1 or
  16004. later. OpenSSL 1.0.0 and earlier are no longer supported by the
  16005. OpenSSL team, and should not be used. Closes ticket 20303.
  16006. Changes in version 0.2.9.3-alpha - 2016-09-23
  16007. Tor 0.2.9.3-alpha adds improved support for entities that want to make
  16008. high-performance services available through the Tor .onion mechanism
  16009. without themselves receiving anonymity as they host those services. It
  16010. also tries harder to ensure that all steps on a circuit are using the
  16011. strongest crypto possible, strengthens some TLS properties, and
  16012. resolves several bugs -- including a pair of crash bugs from the 0.2.8
  16013. series. Anybody running an earlier version of 0.2.9.x should upgrade.
  16014. o Major bugfixes (crash, also in 0.2.8.8):
  16015. - Fix a complicated crash bug that could affect Tor clients
  16016. configured to use bridges when replacing a networkstatus consensus
  16017. in which one of their bridges was mentioned. OpenBSD users saw
  16018. more crashes here, but all platforms were potentially affected.
  16019. Fixes bug 20103; bugfix on 0.2.8.2-alpha.
  16020. o Major bugfixes (relay, OOM handler, also in 0.2.8.8):
  16021. - Fix a timing-dependent assertion failure that could occur when we
  16022. tried to flush from a circuit after having freed its cells because
  16023. of an out-of-memory condition. Fixes bug 20203; bugfix on
  16024. 0.2.8.1-alpha. Thanks to "cypherpunks" for help diagnosing
  16025. this one.
  16026. o Major features (circuit building, security):
  16027. - Authorities, relays and clients now require ntor keys in all
  16028. descriptors, for all hops (except for rare hidden service protocol
  16029. cases), for all circuits, and for all other roles. Part of
  16030. ticket 19163.
  16031. - Tor authorities, relays, and clients only use ntor, except for
  16032. rare cases in the hidden service protocol. Part of ticket 19163.
  16033. o Major features (single-hop "hidden" services):
  16034. - Add experimental HiddenServiceSingleHopMode and
  16035. HiddenServiceNonAnonymousMode options. When both are set to 1,
  16036. every hidden service on a Tor instance becomes a non-anonymous
  16037. Single Onion Service. Single Onions make one-hop (direct)
  16038. connections to their introduction and rendezvous points. One-hop
  16039. circuits make Single Onion servers easily locatable, but clients
  16040. remain location-anonymous. This is compatible with the existing
  16041. hidden service implementation, and works on the current tor
  16042. network without any changes to older relays or clients. Implements
  16043. proposal 260, completes ticket 17178. Patch by teor and asn.
  16044. o Major features (resource management):
  16045. - Tor can now notice it is about to run out of sockets, and
  16046. preemptively close connections of lower priority. (This feature is
  16047. off by default for now, since the current prioritizing method is
  16048. yet not mature enough. You can enable it by setting
  16049. "DisableOOSCheck 0", but watch out: it might close some sockets
  16050. you would rather have it keep.) Closes ticket 18640.
  16051. o Major bugfixes (circuit building):
  16052. - Hidden service client-to-intro-point and service-to-rendezvous-
  16053. point circuits use the TAP key supplied by the protocol, to avoid
  16054. epistemic attacks. Fixes bug 19163; bugfix on 0.2.4.18-rc.
  16055. o Major bugfixes (compilation, OpenBSD):
  16056. - Fix a Libevent-detection bug in our autoconf script that would
  16057. prevent Tor from linking successfully on OpenBSD. Patch from
  16058. rubiate. Fixes bug 19902; bugfix on 0.2.9.1-alpha.
  16059. o Major bugfixes (hidden services):
  16060. - Clients now require hidden services to include the TAP keys for
  16061. their intro points in the hidden service descriptor. This prevents
  16062. an inadvertent upgrade to ntor, which a malicious hidden service
  16063. could use to distinguish clients by consensus version. Fixes bug
  16064. 20012; bugfix on 0.2.4.8-alpha. Patch by teor.
  16065. o Minor features (security, TLS):
  16066. - Servers no longer support clients that without AES ciphersuites.
  16067. (3DES is no longer considered an acceptable cipher.) We believe
  16068. that no such Tor clients currently exist, since Tor has required
  16069. OpenSSL 0.9.7 or later since 2009. Closes ticket 19998.
  16070. o Minor feature (fallback directories):
  16071. - Remove 8 fallbacks that are no longer suitable, leaving 81 of the
  16072. 100 fallbacks originally introduced in Tor 0.2.8.2-alpha in March
  16073. 2016. Closes ticket 20190; patch by teor.
  16074. o Minor features (geoip, also in 0.2.8.8):
  16075. - Update geoip and geoip6 to the September 6 2016 Maxmind GeoLite2
  16076. Country database.
  16077. o Minor feature (port flags):
  16078. - Add new flags to the *Port options to finer control over which
  16079. requests are allowed. The flags are NoDNSRequest, NoOnionTraffic,
  16080. and the synthetic flag OnionTrafficOnly, which is equivalent to
  16081. NoDNSRequest, NoIPv4Traffic, and NoIPv6Traffic. Closes enhancement
  16082. 18693; patch by "teor".
  16083. o Minor features (directory authority):
  16084. - After voting, if the authorities decide that a relay is not
  16085. "Valid", they no longer include it in the consensus at all. Closes
  16086. ticket 20002; implements part of proposal 272.
  16087. o Minor features (testing):
  16088. - Disable memory protections on OpenBSD when performing our unit
  16089. tests for memwipe(). The test deliberately invokes undefined
  16090. behavior, and the OpenBSD protections interfere with this. Patch
  16091. from "rubiate". Closes ticket 20066.
  16092. o Minor features (testing, ipv6):
  16093. - Add the single-onion and single-onion-ipv6 chutney targets to
  16094. "make test-network-all". This requires a recent chutney version
  16095. with the single onion network flavours (git c72a652 or later).
  16096. Closes ticket 20072; patch by teor.
  16097. - Add the hs-ipv6 chutney target to make test-network-all's IPv6
  16098. tests. Remove bridges+hs, as it's somewhat redundant. This
  16099. requires a recent chutney version that supports IPv6 clients,
  16100. relays, and authorities. Closes ticket 20069; patch by teor.
  16101. o Minor features (Tor2web):
  16102. - Make Tor2web clients respect ReachableAddresses. This feature was
  16103. inadvertently enabled in 0.2.8.6, then removed by bugfix 19973 on
  16104. 0.2.8.7. Implements feature 20034. Patch by teor.
  16105. o Minor features (unit tests):
  16106. - We've done significant work to make the unit tests run faster.
  16107. - Our link-handshake unit tests now check that when invalid
  16108. handshakes fail, they fail with the error messages we expected.
  16109. - Our unit testing code that captures log messages no longer
  16110. prevents them from being written out if the user asked for them
  16111. (by passing --debug or --info or or --notice --warn to the "test"
  16112. binary). This change prevents us from missing unexpected log
  16113. messages simply because we were looking for others. Related to
  16114. ticket 19999.
  16115. - The unit tests now log all warning messages with the "BUG" flag.
  16116. Previously, they only logged errors by default. This change will
  16117. help us make our testing code more correct, and make sure that we
  16118. only hit this code when we mean to. In the meantime, however,
  16119. there will be more warnings in the unit test logs than before.
  16120. This is preparatory work for ticket 19999.
  16121. - The unit tests now treat any failure of a "tor_assert_nonfatal()"
  16122. assertion as a test failure.
  16123. o Minor bug fixes (circuits):
  16124. - Use the CircuitBuildTimeout option whenever
  16125. LearnCircuitBuildTimeout is disabled. Previously, we would respect
  16126. the option when a user disabled it, but not when it was disabled
  16127. because some other option was set. Fixes bug 20073; bugfix on
  16128. 0.2.4.12-alpha. Patch by teor.
  16129. o Minor bugfixes (allocation):
  16130. - Change how we allocate memory for large chunks on buffers, to
  16131. avoid a (currently impossible) integer overflow, and to waste less
  16132. space when allocating unusually large chunks. Fixes bug 20081;
  16133. bugfix on 0.2.0.16-alpha. Issue identified by Guido Vranken.
  16134. - Always include orconfig.h before including any other C headers.
  16135. Sometimes, it includes macros that affect the behavior of the
  16136. standard headers. Fixes bug 19767; bugfix on 0.2.9.1-alpha (the
  16137. first version to use AC_USE_SYSTEM_EXTENSIONS).
  16138. - Fix a syntax error in the IF_BUG_ONCE__() macro in non-GCC-
  16139. compatible compilers. Fixes bug 20141; bugfix on 0.2.9.1-alpha.
  16140. Patch from Gisle Vanem.
  16141. - Stop trying to build with Clang 4.0's -Wthread-safety warnings.
  16142. They apparently require a set of annotations that we aren't
  16143. currently using, and they create false positives in our pthreads
  16144. wrappers. Fixes bug 20110; bugfix on 0.2.9.1-alpha.
  16145. o Minor bugfixes (directory authority):
  16146. - Die with a more useful error when the operator forgets to place
  16147. the authority_signing_key file into the keys directory. This
  16148. avoids an uninformative assert & traceback about having an invalid
  16149. key. Fixes bug 20065; bugfix on 0.2.0.1-alpha.
  16150. - When allowing private addresses, mark Exits that only exit to
  16151. private locations as such. Fixes bug 20064; bugfix
  16152. on 0.2.2.9-alpha.
  16153. o Minor bugfixes (documentation):
  16154. - Document the default PathsNeededToBuildCircuits value that's used
  16155. by clients when the directory authorities don't set
  16156. min_paths_for_circs_pct. Fixes bug 20117; bugfix on 02c320916e02
  16157. in 0.2.4.10-alpha. Patch by teor, reported by Jesse V.
  16158. - Fix manual for the User option: it takes a username, not a UID.
  16159. Fixes bug 19122; bugfix on 0.0.2pre16 (the first version to have
  16160. a manpage!).
  16161. o Minor bugfixes (hidden services):
  16162. - Stop logging intro point details to the client log on certain
  16163. error conditions. Fixed as part of bug 20012; bugfix on
  16164. 0.2.4.8-alpha. Patch by teor.
  16165. o Minor bugfixes (IPv6, testing):
  16166. - Check for IPv6 correctly on Linux when running test networks.
  16167. Fixes bug 19905; bugfix on 0.2.7.3-rc; patch by teor.
  16168. o Minor bugfixes (Linux seccomp2 sandbox):
  16169. - Add permission to run the sched_yield() and sigaltstack() system
  16170. calls, in order to support versions of Tor compiled with asan or
  16171. ubsan code that use these calls. Now "sandbox 1" and
  16172. "--enable-expensive-hardening" should be compatible on more
  16173. systems. Fixes bug 20063; bugfix on 0.2.5.1-alpha.
  16174. o Minor bugfixes (logging):
  16175. - When logging a message from the BUG() macro, be explicit about
  16176. what we were asserting. Previously we were confusing what we were
  16177. asserting with what the bug was. Fixes bug 20093; bugfix
  16178. on 0.2.9.1-alpha.
  16179. - When we are unable to remove the bw_accounting file, do not warn
  16180. if the reason we couldn't remove it was that it didn't exist.
  16181. Fixes bug 19964; bugfix on 0.2.5.4-alpha. Patch from 'pastly'.
  16182. o Minor bugfixes (option parsing):
  16183. - Count unix sockets when counting client listeners (SOCKS, Trans,
  16184. NATD, and DNS). This has no user-visible behaviour changes: these
  16185. options are set once, and never read. Required for correct
  16186. behaviour in ticket 17178. Fixes bug 19677; bugfix on
  16187. 0.2.6.3-alpha. Patch by teor.
  16188. o Minor bugfixes (options):
  16189. - Check the consistency of UseEntryGuards and EntryNodes more
  16190. reliably. Fixes bug 20074; bugfix on 0.2.4.12-alpha. Patch
  16191. by teor.
  16192. - Stop changing the configured value of UseEntryGuards on
  16193. authorities and Tor2web clients. Fixes bug 20074; bugfix on
  16194. commits 51fc6799 in 0.1.1.16-rc and acda1735 in 0.2.4.3-alpha.
  16195. Patch by teor.
  16196. o Minor bugfixes (Tor2web):
  16197. - Prevent Tor2web clients running hidden services, these services
  16198. are not anonymous due to the one-hop client paths. Fixes bug
  16199. 19678. Patch by teor.
  16200. o Minor bugfixes (unit tests):
  16201. - Fix a shared-random unit test that was failing on big endian
  16202. architectures due to internal representation of a integer copied
  16203. to a buffer. The test is changed to take a full 32 bytes of data
  16204. and use the output of a python script that make the COMMIT and
  16205. REVEAL calculation according to the spec. Fixes bug 19977; bugfix
  16206. on 0.2.9.1-alpha.
  16207. - The tor_tls_server_info_callback unit test no longer crashes when
  16208. debug-level logging is turned on. Fixes bug 20041; bugfix
  16209. on 0.2.8.1-alpha.
  16210. Changes in version 0.2.8.8 - 2016-09-23
  16211. Tor 0.2.8.8 fixes two crash bugs present in previous versions of the
  16212. 0.2.8.x series. Relays running 0.2.8.x should upgrade, as should users
  16213. who select public relays as their bridges.
  16214. o Major bugfixes (crash):
  16215. - Fix a complicated crash bug that could affect Tor clients
  16216. configured to use bridges when replacing a networkstatus consensus
  16217. in which one of their bridges was mentioned. OpenBSD users saw
  16218. more crashes here, but all platforms were potentially affected.
  16219. Fixes bug 20103; bugfix on 0.2.8.2-alpha.
  16220. o Major bugfixes (relay, OOM handler):
  16221. - Fix a timing-dependent assertion failure that could occur when we
  16222. tried to flush from a circuit after having freed its cells because
  16223. of an out-of-memory condition. Fixes bug 20203; bugfix on
  16224. 0.2.8.1-alpha. Thanks to "cypherpunks" for help diagnosing
  16225. this one.
  16226. o Minor feature (fallback directories):
  16227. - Remove 8 fallbacks that are no longer suitable, leaving 81 of the
  16228. 100 fallbacks originally introduced in Tor 0.2.8.2-alpha in March
  16229. 2016. Closes ticket 20190; patch by teor.
  16230. o Minor features (geoip):
  16231. - Update geoip and geoip6 to the September 6 2016 Maxmind GeoLite2
  16232. Country database.
  16233. Changes in version 0.2.9.2-alpha - 2016-08-24
  16234. Tor 0.2.9.2-alpha continues development of the 0.2.9 series with
  16235. several new features and bugfixes. It also includes an important
  16236. authority update and an important bugfix from 0.2.8.7. Everyone who
  16237. sets the ReachableAddresses option, and all bridges, are strongly
  16238. encouraged to upgrade to 0.2.8.7, or to 0.2.9.2-alpha.
  16239. o Directory authority changes (also in 0.2.8.7):
  16240. - The "Tonga" bridge authority has been retired; the new bridge
  16241. authority is "Bifroest". Closes tickets 19728 and 19690.
  16242. o Major bugfixes (client, security, also in 0.2.8.7):
  16243. - Only use the ReachableAddresses option to restrict the first hop
  16244. in a path. In earlier versions of 0.2.8.x, it would apply to
  16245. every hop in the path, with a possible degradation in anonymity
  16246. for anyone using an uncommon ReachableAddress setting. Fixes bug
  16247. 19973; bugfix on 0.2.8.2-alpha.
  16248. o Major features (user interface):
  16249. - Tor now supports the ability to declare options deprecated, so
  16250. that we can recommend that people stop using them. Previously,
  16251. this was done in an ad-hoc way. Closes ticket 19820.
  16252. o Major bugfixes (directory downloads):
  16253. - Avoid resetting download status for consensuses hourly, since we
  16254. already have another, smarter retry mechanism. Fixes bug 8625;
  16255. bugfix on 0.2.0.9-alpha.
  16256. o Minor features (config):
  16257. - Warn users when descriptor and port addresses are inconsistent.
  16258. Mitigates bug 13953; patch by teor.
  16259. o Minor features (geoip):
  16260. - Update geoip and geoip6 to the August 2 2016 Maxmind GeoLite2
  16261. Country database.
  16262. o Minor features (user interface):
  16263. - There is a new --list-deprecated-options command-line option to
  16264. list all of the deprecated options. Implemented as part of
  16265. ticket 19820.
  16266. o Minor bugfixes (code style):
  16267. - Fix an integer signedness conversion issue in the case conversion
  16268. tables. Fixes bug 19168; bugfix on 0.2.1.11-alpha.
  16269. o Minor bugfixes (compilation):
  16270. - Build correctly on versions of libevent2 without support for
  16271. evutil_secure_rng_add_bytes(). Fixes bug 19904; bugfix
  16272. on 0.2.5.4-alpha.
  16273. - Fix a compilation warning on GCC versions before 4.6. Our
  16274. ENABLE_GCC_WARNING macro used the word "warning" as an argument,
  16275. when it is also required as an argument to the compiler pragma.
  16276. Fixes bug 19901; bugfix on 0.2.9.1-alpha.
  16277. o Minor bugfixes (compilation, also in 0.2.8.7):
  16278. - Remove an inappropriate "inline" in tortls.c that was causing
  16279. warnings on older versions of GCC. Fixes bug 19903; bugfix
  16280. on 0.2.8.1-alpha.
  16281. o Minor bugfixes (fallback directories, also in 0.2.8.7):
  16282. - Avoid logging a NULL string pointer when loading fallback
  16283. directory information. Fixes bug 19947; bugfix on 0.2.4.7-alpha
  16284. and 0.2.8.1-alpha. Report and patch by "rubiate".
  16285. o Minor bugfixes (logging):
  16286. - Log a more accurate message when we fail to dump a microdescriptor.
  16287. Fixes bug 17758; bugfix on 0.2.2.8-alpha. Patch from Daniel Pinto.
  16288. o Minor bugfixes (memory leak):
  16289. - Fix a series of slow memory leaks related to parsing torrc files
  16290. and options. Fixes bug 19466; bugfix on 0.2.1.6-alpha.
  16291. o Deprecated features:
  16292. - A number of DNS-cache-related sub-options for client ports are now
  16293. deprecated for security reasons, and may be removed in a future
  16294. version of Tor. (We believe that client-side DNS caching is a bad
  16295. idea for anonymity, and you should not turn it on.) The options
  16296. are: CacheDNS, CacheIPv4DNS, CacheIPv6DNS, UseDNSCache,
  16297. UseIPv4Cache, and UseIPv6Cache.
  16298. - A number of options are deprecated for security reasons, and may
  16299. be removed in a future version of Tor. The options are:
  16300. AllowDotExit, AllowInvalidNodes, AllowSingleHopCircuits,
  16301. AllowSingleHopExits, ClientDNSRejectInternalAddresses,
  16302. CloseHSClientCircuitsImmediatelyOnTimeout,
  16303. CloseHSServiceRendCircuitsImmediatelyOnTimeout,
  16304. ExcludeSingleHopRelays, FastFirstHopPK, TLSECGroup,
  16305. UseNTorHandshake, and WarnUnsafeSocks.
  16306. - The *ListenAddress options are now deprecated as unnecessary: the
  16307. corresponding *Port options should be used instead. These options
  16308. may someday be removed. The affected options are:
  16309. ControlListenAddress, DNSListenAddress, DirListenAddress,
  16310. NATDListenAddress, ORListenAddress, SocksListenAddress,
  16311. and TransListenAddress.
  16312. o Documentation:
  16313. - Correct the IPv6 syntax in our documentation for the
  16314. VirtualAddrNetworkIPv6 torrc option. Closes ticket 19743.
  16315. o Removed code:
  16316. - We no longer include the (dead, deprecated) bufferevent code in
  16317. Tor. Closes ticket 19450. Based on a patch from U+039b.
  16318. Changes in version 0.2.8.7 - 2016-08-24
  16319. Tor 0.2.8.7 fixes an important bug related to the ReachableAddresses
  16320. option in 0.2.8.6, and replaces a retiring bridge authority. Everyone
  16321. who sets the ReachableAddresses option, and all bridges, are strongly
  16322. encouraged to upgrade.
  16323. o Directory authority changes:
  16324. - The "Tonga" bridge authority has been retired; the new bridge
  16325. authority is "Bifroest". Closes tickets 19728 and 19690.
  16326. o Major bugfixes (client, security):
  16327. - Only use the ReachableAddresses option to restrict the first hop
  16328. in a path. In earlier versions of 0.2.8.x, it would apply to
  16329. every hop in the path, with a possible degradation in anonymity
  16330. for anyone using an uncommon ReachableAddress setting. Fixes bug
  16331. 19973; bugfix on 0.2.8.2-alpha.
  16332. o Minor features (geoip):
  16333. - Update geoip and geoip6 to the August 2 2016 Maxmind GeoLite2
  16334. Country database.
  16335. o Minor bugfixes (compilation):
  16336. - Remove an inappropriate "inline" in tortls.c that was causing
  16337. warnings on older versions of GCC. Fixes bug 19903; bugfix
  16338. on 0.2.8.1-alpha.
  16339. o Minor bugfixes (fallback directories):
  16340. - Avoid logging a NULL string pointer when loading fallback
  16341. directory information. Fixes bug 19947; bugfix on 0.2.4.7-alpha
  16342. and 0.2.8.1-alpha. Report and patch by "rubiate".
  16343. Changes in version 0.2.9.1-alpha - 2016-08-08
  16344. Tor 0.2.9.1-alpha is the first alpha release in the 0.2.9 development
  16345. series. It improves our support for hardened builds and compiler
  16346. warnings, deploys some critical infrastructure for improvements to
  16347. hidden services, includes a new timing backend that we hope to use for
  16348. better support for traffic padding, makes it easier for programmers to
  16349. log unexpected events, and contains other small improvements to
  16350. security, correctness, and performance.
  16351. Below are the changes since 0.2.8.6.
  16352. o New system requirements:
  16353. - Tor now requires Libevent version 2.0.10-stable or later. Older
  16354. versions of Libevent have less efficient backends for several
  16355. platforms, and lack the DNS code that we use for our server-side
  16356. DNS support. This implements ticket 19554.
  16357. - Tor now requires zlib version 1.2 or later, for security,
  16358. efficiency, and (eventually) gzip support. (Back when we started,
  16359. zlib 1.1 and zlib 1.0 were still found in the wild. 1.2 was
  16360. released in 2003. We recommend the latest version.)
  16361. o Major features (build, hardening):
  16362. - Tor now builds with -ftrapv by default on compilers that support
  16363. it. This option detects signed integer overflow (which C forbids),
  16364. and turns it into a hard-failure. We do not apply this option to
  16365. code that needs to run in constant time to avoid side-channels;
  16366. instead, we use -fwrapv in that code. Closes ticket 17983.
  16367. - When --enable-expensive-hardening is selected, stop applying the
  16368. clang/gcc sanitizers to code that needs to run in constant time.
  16369. Although we are aware of no introduced side-channels, we are not
  16370. able to prove that there are none. Related to ticket 17983.
  16371. o Major features (compilation):
  16372. - Our big list of extra GCC warnings is now enabled by default when
  16373. building with GCC (or with anything like Clang that claims to be
  16374. GCC-compatible). To make all warnings into fatal compilation
  16375. errors, pass --enable-fatal-warnings to configure. Closes
  16376. ticket 19044.
  16377. - Use the Autoconf macro AC_USE_SYSTEM_EXTENSIONS to automatically
  16378. turn on C and POSIX extensions. (Previously, we attempted to do
  16379. this on an ad hoc basis.) Closes ticket 19139.
  16380. o Major features (directory authorities, hidden services):
  16381. - Directory authorities can now perform the shared randomness
  16382. protocol specified by proposal 250. Using this protocol, directory
  16383. authorities generate a global fresh random value every day. In the
  16384. future, this value will be used by hidden services to select
  16385. HSDirs. This release implements the directory authority feature;
  16386. the hidden service side will be implemented in the future as part
  16387. of proposal 224. Resolves ticket 16943; implements proposal 250.
  16388. o Major features (downloading, random exponential backoff):
  16389. - When we fail to download an object from a directory service, wait
  16390. for an (exponentially increasing) randomized amount of time before
  16391. retrying, rather than a fixed interval as we did before. This
  16392. prevents a group of Tor instances from becoming too synchronized,
  16393. or a single Tor instance from becoming too predictable, in its
  16394. download schedule. Closes ticket 15942.
  16395. o Major bugfixes (exit policies):
  16396. - Avoid disclosing exit outbound bind addresses, configured port
  16397. bind addresses, and local interface addresses in relay descriptors
  16398. by default under ExitPolicyRejectPrivate. Instead, only reject
  16399. these (otherwise unlisted) addresses if
  16400. ExitPolicyRejectLocalInterfaces is set. Fixes bug 18456; bugfix on
  16401. 0.2.7.2-alpha. Patch by teor.
  16402. o Major bugfixes (hidden service client):
  16403. - Allow Tor clients with appropriate controllers to work with
  16404. FetchHidServDescriptors set to 0. Previously, this option also
  16405. disabled descriptor cache lookup, thus breaking hidden services
  16406. entirely. Fixes bug 18704; bugfix on 0.2.0.20-rc. Patch by "twim".
  16407. o Minor features (build, hardening):
  16408. - Detect and work around a libclang_rt problem that would prevent
  16409. clang from finding __mulodi4() on some 32-bit platforms, and thus
  16410. keep -ftrapv from linking on those systems. Closes ticket 19079.
  16411. - When building on a system without runtime support for the runtime
  16412. hardening options, try to log a useful warning at configuration
  16413. time, rather than an incomprehensible warning at link time. If
  16414. expensive hardening was requested, this warning becomes an error.
  16415. Closes ticket 18895.
  16416. o Minor features (code safety):
  16417. - In our integer-parsing functions, ensure that maxiumum value we
  16418. give is no smaller than the minimum value. Closes ticket 19063;
  16419. patch from U+039b.
  16420. o Minor features (controller):
  16421. - Implement new GETINFO queries for all downloads that use
  16422. download_status_t to schedule retries. This allows controllers to
  16423. examine the schedule for pending downloads. Closes ticket 19323.
  16424. - Allow controllers to configure basic client authorization on
  16425. hidden services when they create them with the ADD_ONION control
  16426. command. Implements ticket 15588. Patch by "special".
  16427. - Fire a STATUS_SERVER controller event whenever the hibernation
  16428. status changes between "awake"/"soft"/"hard". Closes ticket 18685.
  16429. o Minor features (directory authority):
  16430. - Directory authorities now only give the Guard flag to a relay if
  16431. they are also giving it the Stable flag. This change allows us to
  16432. simplify path selection for clients. It should have minimal effect
  16433. in practice, since >99% of Guards already have the Stable flag.
  16434. Implements ticket 18624.
  16435. - Directory authorities now write their v3-status-votes file out to
  16436. disk earlier in the consensus process, so we have a record of the
  16437. votes even if we abort the consensus process. Resolves
  16438. ticket 19036.
  16439. o Minor features (hidden service):
  16440. - Stop being so strict about the payload length of "rendezvous1"
  16441. cells. We used to be locked in to the "TAP" handshake length, and
  16442. now we can handle better handshakes like "ntor". Resolves
  16443. ticket 18998.
  16444. o Minor features (infrastructure, time):
  16445. - Tor now uses the operating system's monotonic timers (where
  16446. available) for internal fine-grained timing. Previously we would
  16447. look at the system clock, and then attempt to compensate for the
  16448. clock running backwards. Closes ticket 18908.
  16449. - Tor now includes an improved timer backend, so that we can
  16450. efficiently support tens or hundreds of thousands of concurrent
  16451. timers, as will be needed for some of our planned anti-traffic-
  16452. analysis work. This code is based on William Ahern's "timeout.c"
  16453. project, which implements a "tickless hierarchical timing wheel".
  16454. Closes ticket 18365.
  16455. o Minor features (logging):
  16456. - Provide a more useful warning message when configured with an
  16457. invalid Nickname. Closes ticket 18300; patch from "icanhasaccount".
  16458. - When dumping unparseable router descriptors, optionally store them
  16459. in separate files, named by digest, up to a configurable size
  16460. limit. You can change the size limit by setting the
  16461. MaxUnparseableDescSizeToLog option, and disable this feature by
  16462. setting that option to 0. Closes ticket 18322.
  16463. - Add a set of macros to check nonfatal assertions, for internal
  16464. use. Migrating more of our checks to these should help us avoid
  16465. needless crash bugs. Closes ticket 18613.
  16466. o Minor features (performance):
  16467. - Change the "optimistic data" extension from "off by default" to
  16468. "on by default". The default was ordinarily overridden by a
  16469. consensus option, but when clients were bootstrapping for the
  16470. first time, they would not have a consensus to get the option
  16471. from. Changing this default saves a round-trip during startup.
  16472. Closes ticket 18815.
  16473. o Minor features (relay, usability):
  16474. - When the directory authorities refuse a bad relay's descriptor,
  16475. encourage the relay operator to contact us. Many relay operators
  16476. won't notice this line in their logs, but it's a win if even a few
  16477. learn why we don't like what their relay was doing. Resolves
  16478. ticket 18760.
  16479. o Minor features (testing):
  16480. - Let backtrace tests work correctly under AddressSanitizer. Fixes
  16481. part of bug 18934; bugfix on 0.2.5.2-alpha.
  16482. - Move the test-network.sh script to chutney, and modify tor's test-
  16483. network.sh to call the (newer) chutney version when available.
  16484. Resolves ticket 19116. Patch by teor.
  16485. - Use the lcov convention for marking lines as unreachable, so that
  16486. we don't count them when we're generating test coverage data.
  16487. Update our coverage tools to understand this convention. Closes
  16488. ticket 16792.
  16489. o Minor bugfixes (bootstrap):
  16490. - Remember the directory we fetched the consensus or previous
  16491. certificates from, and use it to fetch future authority
  16492. certificates. This change improves bootstrapping performance.
  16493. Fixes bug 18963; bugfix on 0.2.8.1-alpha.
  16494. o Minor bugfixes (build):
  16495. - The test-stem and test-network makefile targets now depend only on
  16496. the tor binary that they are testing. Previously, they depended on
  16497. "make all". Fixes bug 18240; bugfix on 0.2.8.2-alpha. Based on a
  16498. patch from "cypherpunks".
  16499. o Minor bugfixes (circuits):
  16500. - Make sure extend_info_from_router() is only called on servers.
  16501. Fixes bug 19639; bugfix on 0.2.8.1-alpha.
  16502. o Minor bugfixes (compilation):
  16503. - When building with Clang, use a full set of GCC warnings.
  16504. (Previously, we included only a subset, because of the way we
  16505. detected them.) Fixes bug 19216; bugfix on 0.2.0.1-alpha.
  16506. o Minor bugfixes (directory authority):
  16507. - Authorities now sort the "package" lines in their votes, for ease
  16508. of debugging. (They are already sorted in consensus documents.)
  16509. Fixes bug 18840; bugfix on 0.2.6.3-alpha.
  16510. - When parsing a detached signature, make sure we use the length of
  16511. the digest algorithm instead of an hardcoded DIGEST256_LEN in
  16512. order to avoid comparing bytes out-of-bounds with a smaller digest
  16513. length such as SHA1. Fixes bug 19066; bugfix on 0.2.2.6-alpha.
  16514. o Minor bugfixes (documentation):
  16515. - Document the --passphrase-fd option in the tor manpage. Fixes bug
  16516. 19504; bugfix on 0.2.7.3-rc.
  16517. - Fix the description of the --passphrase-fd option in the
  16518. tor-gencert manpage. The option is used to pass the number of a
  16519. file descriptor to read the passphrase from, not to read the file
  16520. descriptor from. Fixes bug 19505; bugfix on 0.2.0.20-alpha.
  16521. o Minor bugfixes (ephemeral hidden service):
  16522. - When deleting an ephemeral hidden service, close its intro points
  16523. even if they are not completely open. Fixes bug 18604; bugfix
  16524. on 0.2.7.1-alpha.
  16525. o Minor bugfixes (guard selection):
  16526. - Use a single entry guard even if the NumEntryGuards consensus
  16527. parameter is not provided. Fixes bug 17688; bugfix
  16528. on 0.2.5.6-alpha.
  16529. - Don't mark guards as unreachable if connection_connect() fails.
  16530. That function fails for local reasons, so it shouldn't reveal
  16531. anything about the status of the guard. Fixes bug 14334; bugfix
  16532. on 0.2.3.10-alpha.
  16533. o Minor bugfixes (hidden service client):
  16534. - Increase the minimum number of internal circuits we preemptively
  16535. build from 2 to 3, so a circuit is available when a client
  16536. connects to another onion service. Fixes bug 13239; bugfix
  16537. on 0.1.0.1-rc.
  16538. o Minor bugfixes (logging):
  16539. - When logging a directory ownership mismatch, log the owning
  16540. username correctly. Fixes bug 19578; bugfix on 0.2.2.29-beta.
  16541. o Minor bugfixes (memory leaks):
  16542. - Fix a small, uncommon memory leak that could occur when reading a
  16543. truncated ed25519 key file. Fixes bug 18956; bugfix
  16544. on 0.2.6.1-alpha.
  16545. o Minor bugfixes (testing):
  16546. - Allow clients to retry HSDirs much faster in test networks. Fixes
  16547. bug 19702; bugfix on 0.2.7.1-alpha. Patch by teor.
  16548. - Disable ASAN's detection of segmentation faults while running
  16549. test_bt.sh, so that we can make sure that our own backtrace
  16550. generation code works. Fixes another aspect of bug 18934; bugfix
  16551. on 0.2.5.2-alpha. Patch from "cypherpunks".
  16552. - Fix the test-network-all target on out-of-tree builds by using the
  16553. correct path to the test driver script. Fixes bug 19421; bugfix
  16554. on 0.2.7.3-rc.
  16555. o Minor bugfixes (time):
  16556. - Improve overflow checks in tv_udiff and tv_mdiff. Fixes bug 19483;
  16557. bugfix on all released tor versions.
  16558. - When computing the difference between two times in milliseconds,
  16559. we now round to the nearest millisecond correctly. Previously, we
  16560. could sometimes round in the wrong direction. Fixes bug 19428;
  16561. bugfix on 0.2.2.2-alpha.
  16562. o Minor bugfixes (user interface):
  16563. - Display a more accurate number of suppressed messages in the log
  16564. rate-limiter. Previously, there was a potential integer overflow
  16565. in the counter. Now, if the number of messages hits a maximum, the
  16566. rate-limiter doesn't count any further. Fixes bug 19435; bugfix
  16567. on 0.2.4.11-alpha.
  16568. - Fix a typo in the passphrase prompt for the ed25519 identity key.
  16569. Fixes bug 19503; bugfix on 0.2.7.2-alpha.
  16570. o Code simplification and refactoring:
  16571. - Remove redundant declarations of the MIN macro. Closes
  16572. ticket 18889.
  16573. - Rename tor_dup_addr() to tor_addr_to_str_dup() to avoid confusion.
  16574. Closes ticket 18462; patch from "icanhasaccount".
  16575. - Split the 600-line directory_handle_command_get function into
  16576. separate functions for different URL types. Closes ticket 16698.
  16577. o Documentation:
  16578. - Fix spelling of "--enable-tor2web-mode" in the manpage. Closes
  16579. ticket 19153. Patch from "U+039b".
  16580. o Removed features:
  16581. - Remove support for "GET /tor/bytes.txt" DirPort request, and
  16582. "GETINFO dir-usage" controller request, which were only available
  16583. via a compile-time option in Tor anyway. Feature was added in
  16584. 0.2.2.1-alpha. Resolves ticket 19035.
  16585. - There is no longer a compile-time option to disable support for
  16586. TransPort. (If you don't want TransPort; just don't use it.) Patch
  16587. from "U+039b". Closes ticket 19449.
  16588. o Testing:
  16589. - Run more workqueue tests as part of "make check". These had
  16590. previously been implemented, but you needed to know special
  16591. command-line options to enable them.
  16592. - We now have unit tests for our code to reject zlib "compression
  16593. bombs". (Fortunately, the code works fine.)
  16594. Changes in version 0.2.8.6 - 2016-08-02
  16595. Tor 0.2.8.6 is the first stable version of the Tor 0.2.8 series.
  16596. The Tor 0.2.8 series improves client bootstrapping performance,
  16597. completes the authority-side implementation of improved identity
  16598. keys for relays, and includes numerous bugfixes and performance
  16599. improvements throughout the program. This release continues to
  16600. improve the coverage of Tor's test suite. For a full list of
  16601. changes since Tor 0.2.7, see the ReleaseNotes file.
  16602. Changes since 0.2.8.5-rc:
  16603. o Minor features (geoip):
  16604. - Update geoip and geoip6 to the July 6 2016 Maxmind GeoLite2
  16605. Country database.
  16606. o Minor bugfixes (compilation):
  16607. - Fix a compilation warning in the unit tests on systems where char
  16608. is signed. Fixes bug 19682; bugfix on 0.2.8.1-alpha.
  16609. o Minor bugfixes (fallback directories):
  16610. - Remove 1 fallback that was on the hardcoded list, then opted-out,
  16611. leaving 89 of the 100 fallbacks originally introduced in Tor
  16612. 0.2.8.2-alpha in March 2016. Closes ticket 19782; patch by teor.
  16613. o Minor bugfixes (Linux seccomp2 sandbox):
  16614. - Allow more syscalls when running with "Sandbox 1" enabled:
  16615. sysinfo, getsockopt(SO_SNDBUF), and setsockopt(SO_SNDBUFFORCE). On
  16616. some systems, these are required for Tor to start. Fixes bug
  16617. 18397; bugfix on 0.2.5.1-alpha. Patch from Daniel Pinto.
  16618. - Allow IPPROTO_UDP datagram sockets when running with "Sandbox 1",
  16619. so that get_interface_address6_via_udp_socket_hack() can work.
  16620. Fixes bug 19660; bugfix on 0.2.5.1-alpha.
  16621. Changes in version 0.2.8.5-rc - 2016-07-07
  16622. Tor 0.2.8.5-rc is the second release candidate in the Tor 0.2.8
  16623. series. If we find no new bugs or regressions here, the first stable
  16624. 0.2.8 release will be identical to it. It has a few small bugfixes
  16625. against previous versions.
  16626. o Directory authority changes:
  16627. - Urras is no longer a directory authority. Closes ticket 19271.
  16628. o Major bugfixes (heartbeat):
  16629. - Fix a regression that would crash Tor when the periodic
  16630. "heartbeat" log messages were disabled. Fixes bug 19454; bugfix on
  16631. 0.2.8.1-alpha. Reported by "kubaku".
  16632. o Minor features (build):
  16633. - Tor now again builds with the recent OpenSSL 1.1 development
  16634. branch (tested against 1.1.0-pre6-dev). Closes ticket 19499.
  16635. - When building manual pages, set the timezone to "UTC", so that the
  16636. output is reproducible. Fixes bug 19558; bugfix on 0.2.2.9-alpha.
  16637. Patch from intrigeri.
  16638. o Minor bugfixes (fallback directory selection):
  16639. - Avoid errors during fallback selection if there are no eligible
  16640. fallbacks. Fixes bug 19480; bugfix on 0.2.8.3-alpha. Patch
  16641. by teor.
  16642. o Minor bugfixes (IPv6, microdescriptors):
  16643. - Don't check node addresses when we only have a routerstatus. This
  16644. allows IPv6-only clients to bootstrap by fetching microdescriptors
  16645. from fallback directory mirrors. (The microdescriptor consensus
  16646. has no IPv6 addresses in it.) Fixes bug 19608; bugfix
  16647. on 0.2.8.2-alpha.
  16648. o Minor bugfixes (logging):
  16649. - Reduce pointlessly verbose log messages when directory servers
  16650. can't be found. Fixes bug 18849; bugfix on 0.2.8.3-alpha and
  16651. 0.2.8.1-alpha. Patch by teor.
  16652. - When a fallback directory changes its fingerprint from the hard-
  16653. coded fingerprint, log a less severe, more explanatory log
  16654. message. Fixes bug 18812; bugfix on 0.2.8.1-alpha. Patch by teor.
  16655. o Minor bugfixes (Linux seccomp2 sandboxing):
  16656. - Allow statistics to be written to disk when "Sandbox 1" is
  16657. enabled. Fixes bugs 19556 and 19957; bugfix on 0.2.5.1-alpha and
  16658. 0.2.6.1-alpha respectively.
  16659. o Minor bugfixes (user interface):
  16660. - Remove a warning message "Service [scrubbed] not found after
  16661. descriptor upload". This message appears when one uses HSPOST
  16662. control command to upload a service descriptor. Since there is
  16663. only a descriptor and no service, showing this message is
  16664. pointless and confusing. Fixes bug 19464; bugfix on 0.2.7.2-alpha.
  16665. o Fallback directory list:
  16666. - Add a comment to the generated fallback directory list that
  16667. explains how to comment out unsuitable fallbacks in a way that's
  16668. compatible with the stem fallback parser.
  16669. - Update fallback whitelist and blacklist based on relay operator
  16670. emails. Blacklist unsuitable (non-working, over-volatile)
  16671. fallbacks. Resolves ticket 19071. Patch by teor.
  16672. - Remove 10 unsuitable fallbacks, leaving 90 of the 100 fallbacks
  16673. originally introduced in Tor 0.2.8.2-alpha in March 2016. Closes
  16674. ticket 19071; patch by teor.
  16675. Changes in version 0.2.8.4-rc - 2016-06-15
  16676. Tor 0.2.8.4-rc is the first release candidate in the Tor 0.2.8 series.
  16677. If we find no new bugs or regressions here, the first stable 0.2.8
  16678. release will be identical to it. It has a few small bugfixes against
  16679. previous versions.
  16680. o Major bugfixes (user interface):
  16681. - Correctly give a warning in the cases where a relay is specified
  16682. by nickname, and one such relay is found, but it is not officially
  16683. Named. Fixes bug 19203; bugfix on 0.2.3.1-alpha.
  16684. o Minor features (build):
  16685. - Tor now builds once again with the recent OpenSSL 1.1 development
  16686. branch (tested against 1.1.0-pre5 and 1.1.0-pre6-dev).
  16687. o Minor features (geoip):
  16688. - Update geoip and geoip6 to the June 7 2016 Maxmind GeoLite2
  16689. Country database.
  16690. o Minor bugfixes (compilation):
  16691. - Cause the unit tests to compile correctly on mingw64 versions that
  16692. lack sscanf. Fixes bug 19213; bugfix on 0.2.7.1-alpha.
  16693. o Minor bugfixes (downloading):
  16694. - Predict more correctly whether we'll be downloading over HTTP when
  16695. we determine the maximum length of a URL. This should avoid a
  16696. "BUG" warning about the Squid HTTP proxy and its URL limits. Fixes
  16697. bug 19191.
  16698. Changes in version 0.2.8.3-alpha - 2016-05-26
  16699. Tor 0.2.8.3-alpha resolves several bugs, most of them introduced over
  16700. the course of the 0.2.8 development cycle. It improves the behavior of
  16701. directory clients, fixes several crash bugs, fixes a gap in compiler
  16702. hardening, and allows the full integration test suite to run on
  16703. more platforms.
  16704. o Major bugfixes (security, client, DNS proxy):
  16705. - Stop a crash that could occur when a client running with DNSPort
  16706. received a query with multiple address types, and the first
  16707. address type was not supported. Found and fixed by Scott Dial.
  16708. Fixes bug 18710; bugfix on 0.2.5.4-alpha.
  16709. o Major bugfixes (security, compilation):
  16710. - Correctly detect compiler flags on systems where _FORTIFY_SOURCE
  16711. is predefined. Previously, our use of -D_FORTIFY_SOURCE would
  16712. cause a compiler warning, thereby making other checks fail, and
  16713. needlessly disabling compiler-hardening support. Fixes one case of
  16714. bug 18841; bugfix on 0.2.3.17-beta. Patch from "trudokal".
  16715. o Major bugfixes (security, directory authorities):
  16716. - Fix a crash and out-of-bounds write during authority voting, when
  16717. the list of relays includes duplicate ed25519 identity keys. Fixes
  16718. bug 19032; bugfix on 0.2.8.2-alpha.
  16719. o Major bugfixes (client, bootstrapping):
  16720. - Check if bootstrap consensus downloads are still needed when the
  16721. linked connection attaches. This prevents tor making unnecessary
  16722. begindir-style connections, which are the only directory
  16723. connections tor clients make since the fix for 18483 was merged.
  16724. - Fix some edge cases where consensus download connections may not
  16725. have been closed, even though they were not needed. Related to fix
  16726. for 18809.
  16727. - Make relays retry consensus downloads the correct number of times,
  16728. rather than the more aggressive client retry count. Fixes part of
  16729. ticket 18809.
  16730. - Stop downloading consensuses when we have a consensus, even if we
  16731. don't have all the certificates for it yet. Fixes bug 18809;
  16732. bugfix on 0.2.8.1-alpha. Patches by arma and teor.
  16733. o Major bugfixes (directory mirrors):
  16734. - Decide whether to advertise begindir support in the the same way
  16735. we decide whether to advertise our DirPort. Allowing these
  16736. decisions to become out-of-sync led to surprising behavior like
  16737. advertising begindir support when hibernation made us not
  16738. advertise a DirPort. Resolves bug 18616; bugfix on 0.2.8.1-alpha.
  16739. Patch by teor.
  16740. o Major bugfixes (IPv6 bridges, client):
  16741. - Actually use IPv6 addresses when selecting directory addresses for
  16742. IPv6 bridges. Fixes bug 18921; bugfix on 0.2.8.1-alpha. Patch
  16743. by "teor".
  16744. o Major bugfixes (key management):
  16745. - If OpenSSL fails to generate an RSA key, do not retain a dangling
  16746. pointer to the previous (uninitialized) key value. The impact here
  16747. should be limited to a difficult-to-trigger crash, if OpenSSL is
  16748. running an engine that makes key generation failures possible, or
  16749. if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
  16750. 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
  16751. Baishakhi Ray.
  16752. o Major bugfixes (testing):
  16753. - Fix a bug that would block 'make test-network-all' on systems where
  16754. IPv6 packets were lost. Fixes bug 19008; bugfix on 0.2.7.3-rc.
  16755. - Avoid "WSANOTINITIALISED" warnings in the unit tests. Fixes bug 18668;
  16756. bugfix on 0.2.8.1-alpha.
  16757. o Minor features (clients):
  16758. - Make clients, onion services, and bridge relays always use an
  16759. encrypted begindir connection for directory requests. Resolves
  16760. ticket 18483. Patch by "teor".
  16761. o Minor features (fallback directory mirrors):
  16762. - Give each fallback the same weight for client selection; restrict
  16763. fallbacks to one per operator; report fallback directory detail
  16764. changes when rebuilding list; add new fallback directory mirrors
  16765. to the whitelist; and many other minor simplifications and fixes.
  16766. Closes tasks 17905, 18749, bug 18689, and fixes part of bug 18812 on
  16767. 0.2.8.1-alpha; patch by "teor".
  16768. - Replace the 21 fallbacks generated in January 2016 and included in
  16769. Tor 0.2.8.1-alpha, with a list of 100 fallbacks generated in March
  16770. 2016. Closes task 17158; patch by "teor".
  16771. o Minor features (geoip):
  16772. - Update geoip and geoip6 to the May 4 2016 Maxmind GeoLite2
  16773. Country database.
  16774. o Minor bugfixes (assert, portability):
  16775. - Fix an assertion failure in memarea.c on systems where "long" is
  16776. shorter than the size of a pointer. Fixes bug 18716; bugfix
  16777. on 0.2.1.1-alpha.
  16778. o Minor bugfixes (bootstrap):
  16779. - Consistently use the consensus download schedule for authority
  16780. certificates. Fixes bug 18816; bugfix on 0.2.4.13-alpha.
  16781. o Minor bugfixes (build):
  16782. - Remove a pair of redundant AM_CONDITIONAL declarations from
  16783. configure.ac. Fixes one final case of bug 17744; bugfix
  16784. on 0.2.8.2-alpha.
  16785. - Resolve warnings when building on systems that are concerned with
  16786. signed char. Fixes bug 18728; bugfix on 0.2.7.2-alpha
  16787. and 0.2.6.1-alpha.
  16788. - When libscrypt.h is found, but no libscrypt library can be linked,
  16789. treat libscrypt as absent. Fixes bug 19161; bugfix
  16790. on 0.2.6.1-alpha.
  16791. o Minor bugfixes (client):
  16792. - Turn all TestingClientBootstrap* into non-testing torrc options.
  16793. This changes simply renames them by removing "Testing" in front of
  16794. them and they do not require TestingTorNetwork to be enabled
  16795. anymore. Fixes bug 18481; bugfix on 0.2.8.1-alpha.
  16796. - Make directory node selection more reliable, mainly for IPv6-only
  16797. clients and clients with few reachable addresses. Fixes bug 18929;
  16798. bugfix on 0.2.8.1-alpha. Patch by "teor".
  16799. o Minor bugfixes (controller, microdescriptors):
  16800. - Make GETINFO dir/status-vote/current/consensus conform to the
  16801. control specification by returning "551 Could not open cached
  16802. consensus..." when not caching consensuses. Fixes bug 18920;
  16803. bugfix on 0.2.2.6-alpha.
  16804. o Minor bugfixes (crypto, portability):
  16805. - The SHA3 and SHAKE routines now produce the correct output on Big
  16806. Endian systems. No code calls either algorithm yet, so this is
  16807. primarily a build fix. Fixes bug 18943; bugfix on 0.2.8.1-alpha.
  16808. - Tor now builds again with the recent OpenSSL 1.1 development
  16809. branch (tested against 1.1.0-pre4 and 1.1.0-pre5-dev). Closes
  16810. ticket 18286.
  16811. o Minor bugfixes (directories):
  16812. - When fetching extrainfo documents, compare their SHA256 digests
  16813. and Ed25519 signing key certificates with the routerinfo that led
  16814. us to fetch them, rather than with the most recent routerinfo.
  16815. Otherwise we generate many spurious warnings about mismatches.
  16816. Fixes bug 17150; bugfix on 0.2.7.2-alpha.
  16817. o Minor bugfixes (logging):
  16818. - When we can't generate a signing key because OfflineMasterKey is
  16819. set, do not imply that we should have been able to load it. Fixes
  16820. bug 18133; bugfix on 0.2.7.2-alpha.
  16821. - Stop periodic_event_dispatch() from blasting twelve lines per
  16822. second at loglevel debug. Fixes bug 18729; fix on 0.2.8.1-alpha.
  16823. - When rejecting a misformed INTRODUCE2 cell, only log at
  16824. PROTOCOL_WARN severity. Fixes bug 18761; bugfix on 0.2.8.2-alpha.
  16825. o Minor bugfixes (pluggable transports):
  16826. - Avoid reporting a spurious error when we decide that we don't need
  16827. to terminate a pluggable transport because it has already exited.
  16828. Fixes bug 18686; bugfix on 0.2.5.5-alpha.
  16829. o Minor bugfixes (pointer arithmetic):
  16830. - Fix a bug in memarea_alloc() that could have resulted in remote
  16831. heap write access, if Tor had ever passed an unchecked size to
  16832. memarea_alloc(). Fortunately, all the sizes we pass to
  16833. memarea_alloc() are pre-checked to be less than 128 kilobytes.
  16834. Fixes bug 19150; bugfix on 0.2.1.1-alpha. Bug found by
  16835. Guido Vranken.
  16836. o Minor bugfixes (relays):
  16837. - Consider more config options when relays decide whether to
  16838. regenerate their descriptor. Fixes more of bug 12538; bugfix
  16839. on 0.2.8.1-alpha.
  16840. - Resolve some edge cases where we might launch an ORPort
  16841. reachability check even when DisableNetwork is set. Noticed while
  16842. fixing bug 18616; bugfix on 0.2.3.9-alpha.
  16843. o Minor bugfixes (statistics):
  16844. - We now include consensus downloads via IPv6 in our directory-
  16845. request statistics. Fixes bug 18460; bugfix on 0.2.3.14-alpha.
  16846. o Minor bugfixes (testing):
  16847. - Allow directories in small networks to bootstrap by skipping
  16848. DirPort checks when the consensus has no exits. Fixes bug 19003;
  16849. bugfix on 0.2.8.1-alpha. Patch by teor.
  16850. - Fix a small memory leak that would occur when the
  16851. TestingEnableCellStatsEvent option was turned on. Fixes bug 18673;
  16852. bugfix on 0.2.5.2-alpha.
  16853. o Minor bugfixes (time handling):
  16854. - When correcting a corrupt 'struct tm' value, fill in the tm_wday
  16855. field. Otherwise, our unit tests crash on Windows. Fixes bug
  16856. 18977; bugfix on 0.2.2.25-alpha.
  16857. o Documentation:
  16858. - Document the contents of the 'datadir/keys' subdirectory in the
  16859. manual page. Closes ticket 17621.
  16860. - Stop recommending use of nicknames to identify relays in our
  16861. MapAddress documentation. Closes ticket 18312.
  16862. Changes in version 0.2.8.2-alpha - 2016-03-28
  16863. Tor 0.2.8.2-alpha is the second alpha in its series. It fixes numerous
  16864. bugs in earlier versions of Tor, including some that prevented
  16865. authorities using Tor 0.2.7.x from running correctly. IPv6 and
  16866. directory support should also be much improved.
  16867. o New system requirements:
  16868. - Tor no longer supports versions of OpenSSL with a broken
  16869. implementation of counter mode. (This bug was present in OpenSSL
  16870. 1.0.0, and was fixed in OpenSSL 1.0.0a.) Tor still detects, but no
  16871. longer runs with, these versions.
  16872. - Tor no longer attempts to support platforms where the "time_t"
  16873. type is unsigned. (To the best of our knowledge, only OpenVMS does
  16874. this, and Tor has never actually built on OpenVMS.) Closes
  16875. ticket 18184.
  16876. - Tor now uses Autoconf version 2.63 or later, and Automake 1.11 or
  16877. later (released in 2008 and 2009 respectively). If you are
  16878. building Tor from the git repository instead of from the source
  16879. distribution, and your tools are older than this, you will need to
  16880. upgrade. Closes ticket 17732.
  16881. o Major bugfixes (security, pointers):
  16882. - Avoid a difficult-to-trigger heap corruption attack when extending
  16883. a smartlist to contain over 16GB of pointers. Fixes bug 18162;
  16884. bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
  16885. Reported by Guido Vranken.
  16886. o Major bugfixes (bridges, pluggable transports):
  16887. - Modify the check for OR connections to private addresses. Allow
  16888. bridges on private addresses, including pluggable transports that
  16889. ignore the (potentially private) address in the bridge line. Fixes
  16890. bug 18517; bugfix on 0.2.8.1-alpha. Reported by gk, patch by teor.
  16891. o Major bugfixes (compilation):
  16892. - Repair hardened builds under the clang compiler. Previously, our
  16893. use of _FORTIFY_SOURCE would conflict with clang's address
  16894. sanitizer. Fixes bug 14821; bugfix on 0.2.5.4-alpha.
  16895. o Major bugfixes (crash on shutdown):
  16896. - Correctly handle detaching circuits from muxes when shutting down.
  16897. Fixes bug 18116; bugfix on 0.2.8.1-alpha.
  16898. - Fix an assert-on-exit bug related to counting memory usage in
  16899. rephist.c. Fixes bug 18651; bugfix on 0.2.8.1-alpha.
  16900. o Major bugfixes (crash on startup):
  16901. - Fix a segfault during startup: If a Unix domain socket was
  16902. configured as listener (such as a ControlSocket or a SocksPort
  16903. "unix:" socket), and tor was started as root but not configured to
  16904. switch to another user, tor would segfault while trying to string
  16905. compare a NULL value. Fixes bug 18261; bugfix on 0.2.8.1-alpha.
  16906. Patch by weasel.
  16907. o Major bugfixes (dns proxy mode, crash):
  16908. - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
  16909. bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
  16910. o Major bugfixes (relays, bridge clients):
  16911. - Ensure relays always allow IPv4 OR and Dir connections. Ensure
  16912. bridge clients use the address configured in the bridge line.
  16913. Fixes bug 18348; bugfix on 0.2.8.1-alpha. Reported by sysrqb,
  16914. patch by teor.
  16915. o Major bugfixes (voting):
  16916. - Actually enable support for authorities to match routers by their
  16917. Ed25519 identities. Previously, the code had been written, but
  16918. some debugging code that had accidentally been left in the
  16919. codebase made it stay turned off. Fixes bug 17702; bugfix
  16920. on 0.2.7.2-alpha.
  16921. - When collating votes by Ed25519 identities, authorities now
  16922. include a "NoEdConsensus" flag if the ed25519 value (or lack
  16923. thereof) for a server does not reflect the majority consensus.
  16924. Related to bug 17668; bugfix on 0.2.7.2-alpha.
  16925. - When generating a vote with keypinning disabled, never include two
  16926. entries for the same ed25519 identity. This bug was causing
  16927. authorities to generate votes that they could not parse when a
  16928. router violated key pinning by changing its RSA identity but
  16929. keeping its Ed25519 identity. Fixes bug 17668; fixes part of bug
  16930. 18318. Bugfix on 0.2.7.2-alpha.
  16931. o Minor features (security, win32):
  16932. - Set SO_EXCLUSIVEADDRUSE on Win32 to avoid a local port-stealing
  16933. attack. Fixes bug 18123; bugfix on all tor versions. Patch
  16934. by teor.
  16935. o Minor features (bug-resistance):
  16936. - Make Tor survive errors involving connections without a
  16937. corresponding event object. Previously we'd fail with an
  16938. assertion; now we produce a log message. Related to bug 16248.
  16939. o Minor features (build):
  16940. - Detect systems with FreeBSD-derived kernels (such as GNU/kFreeBSD)
  16941. as having possible IPFW support. Closes ticket 18448. Patch from
  16942. Steven Chamberlain.
  16943. o Minor features (code hardening):
  16944. - Use tor_snprintf() and tor_vsnprintf() even in external and low-
  16945. level code, to harden against accidental failures to NUL-
  16946. terminate. Part of ticket 17852. Patch from jsturgix. Found
  16947. with Flawfinder.
  16948. o Minor features (crypto):
  16949. - Validate the hard-coded Diffie-Hellman parameters and ensure that
  16950. p is a safe prime, and g is a suitable generator. Closes
  16951. ticket 18221.
  16952. o Minor features (geoip):
  16953. - Update geoip and geoip6 to the March 3 2016 Maxmind GeoLite2
  16954. Country database.
  16955. o Minor features (hidden service directory):
  16956. - Streamline relay-side hsdir handling: when relays consider whether
  16957. to accept an uploaded hidden service descriptor, they no longer
  16958. check whether they are one of the relays in the network that is
  16959. "supposed" to handle that descriptor. Implements ticket 18332.
  16960. o Minor features (IPv6):
  16961. - Add ClientPreferIPv6DirPort, which is set to 0 by default. If set
  16962. to 1, tor prefers IPv6 directory addresses.
  16963. - Add ClientUseIPv4, which is set to 1 by default. If set to 0, tor
  16964. avoids using IPv4 for client OR and directory connections.
  16965. - Try harder to obey the IP version restrictions "ClientUseIPv4 0",
  16966. "ClientUseIPv6 0", "ClientPreferIPv6ORPort", and
  16967. "ClientPreferIPv6DirPort". Closes ticket 17840; patch by teor.
  16968. o Minor features (linux seccomp2 sandbox):
  16969. - Reject attempts to change our Address with "Sandbox 1" enabled.
  16970. Changing Address with Sandbox turned on would never actually work,
  16971. but previously it would fail in strange and confusing ways. Found
  16972. while fixing 18548.
  16973. o Minor features (robustness):
  16974. - Exit immediately with an error message if the code attempts to use
  16975. Libevent without having initialized it. This should resolve some
  16976. frequently-made mistakes in our unit tests. Closes ticket 18241.
  16977. o Minor features (unix domain sockets):
  16978. - Add a new per-socket option, RelaxDirModeCheck, to allow creating
  16979. Unix domain sockets without checking the permissions on the parent
  16980. directory. (Tor checks permissions by default because some
  16981. operating systems only check permissions on the parent directory.
  16982. However, some operating systems do look at permissions on the
  16983. socket, and tor's default check is unneeded.) Closes ticket 18458.
  16984. Patch by weasel.
  16985. o Minor bugfixes (exit policies, security):
  16986. - Refresh an exit relay's exit policy when interface addresses
  16987. change. Previously, tor only refreshed the exit policy when the
  16988. configured external address changed. Fixes bug 18208; bugfix on
  16989. 0.2.7.3-rc. Patch by teor.
  16990. o Minor bugfixes (security, hidden services):
  16991. - Prevent hidden services connecting to client-supplied rendezvous
  16992. addresses that are reserved as internal or multicast. Fixes bug
  16993. 8976; bugfix on 0.2.3.21-rc. Patch by dgoulet and teor.
  16994. o Minor bugfixes (build):
  16995. - Do not link the unit tests against both the testing and non-
  16996. testing versions of the static libraries. Fixes bug 18490; bugfix
  16997. on 0.2.7.1-alpha.
  16998. - Avoid spurious failures from configure files related to calling
  16999. exit(0) in TOR_SEARCH_LIBRARY. Fixes bug 18626; bugfix on
  17000. 0.2.0.1-alpha. Patch from "cypherpunks".
  17001. - Silence spurious clang-scan warnings in the ed25519_donna code by
  17002. explicitly initializing some objects. Fixes bug 18384; bugfix on
  17003. 0.2.7.2-alpha. Patch by teor.
  17004. o Minor bugfixes (client, bootstrap):
  17005. - Count receipt of new microdescriptors as progress towards
  17006. bootstrapping. Previously, with EntryNodes set, Tor might not
  17007. successfully repopulate the guard set on bootstrapping. Fixes bug
  17008. 16825; bugfix on 0.2.3.1-alpha.
  17009. o Minor bugfixes (code correctness):
  17010. - Update to the latest version of Trunnel, which tries harder to
  17011. avoid generating code that can invoke memcpy(p,NULL,0). Bug found
  17012. by clang address sanitizer. Fixes bug 18373; bugfix
  17013. on 0.2.7.2-alpha.
  17014. o Minor bugfixes (configuration):
  17015. - Fix a tiny memory leak when parsing a port configuration ending in
  17016. ":auto". Fixes bug 18374; bugfix on 0.2.3.3-alpha.
  17017. o Minor bugfixes (containers):
  17018. - If we somehow attempt to construct a heap with more than
  17019. 1073741822 elements, avoid an integer overflow when maintaining
  17020. the heap property. Fixes bug 18296; bugfix on 0.1.2.1-alpha.
  17021. o Minor bugfixes (correctness):
  17022. - Fix a bad memory handling bug that would occur if we had queued a
  17023. cell on a channel's incoming queue. Fortunately, we can't actually
  17024. queue a cell like that as our code is constructed today, but it's
  17025. best to avoid this kind of error, even if there isn't any code
  17026. that triggers it today. Fixes bug 18570; bugfix on 0.2.4.4-alpha.
  17027. o Minor bugfixes (directory):
  17028. - When generating a URL for a directory server on an IPv6 address,
  17029. wrap the IPv6 address in square brackets. Fixes bug 18051; bugfix
  17030. on 0.2.3.9-alpha. Patch from Malek.
  17031. o Minor bugfixes (fallback directory mirrors):
  17032. - When requesting extrainfo descriptors from a trusted directory
  17033. server, check whether it is an authority or a fallback directory
  17034. which supports extrainfo descriptors. Fixes bug 18489; bugfix on
  17035. 0.2.4.7-alpha. Reported by atagar, patch by teor.
  17036. o Minor bugfixes (hidden service, client):
  17037. - Handle the case where the user makes several fast consecutive
  17038. requests to the same .onion address. Previously, the first six
  17039. requests would each trigger a descriptor fetch, each picking a
  17040. directory (there are 6 overall) and the seventh one would fail
  17041. because no directories were left, thereby triggering a close on
  17042. all current directory connections asking for the hidden service.
  17043. The solution here is to not close the connections if we have
  17044. pending directory fetches. Fixes bug 15937; bugfix
  17045. on 0.2.7.1-alpha.
  17046. o Minor bugfixes (hidden service, control port):
  17047. - Add the onion address to the HS_DESC event for the UPLOADED action
  17048. both on success or failure. It was previously hardcoded with
  17049. UNKNOWN. Fixes bug 16023; bugfix on 0.2.7.2-alpha.
  17050. o Minor bugfixes (hidden service, directory):
  17051. - Bridges now refuse "rendezvous2" (hidden service descriptor)
  17052. publish attempts. Suggested by ticket 18332.
  17053. o Minor bugfixes (linux seccomp2 sandbox):
  17054. - Allow the setrlimit syscall, and the prlimit and prlimit64
  17055. syscalls, which some libc implementations use under the hood.
  17056. Fixes bug 15221; bugfix on 0.2.5.1-alpha.
  17057. - Avoid a 10-second delay when starting as a client with "Sandbox 1"
  17058. enabled and no DNS resolvers configured. This should help TAILS
  17059. start up faster. Fixes bug 18548; bugfix on 0.2.5.1-alpha.
  17060. - Fix the sandbox's interoperability with unix domain sockets under
  17061. setuid. Fixes bug 18253; bugfix on 0.2.8.1-alpha.
  17062. o Minor bugfixes (logging):
  17063. - When logging information about an unparsable networkstatus vote or
  17064. consensus, do not say "vote" when we mean consensus. Fixes bug
  17065. 18368; bugfix on 0.2.0.8-alpha.
  17066. - Scrub service name in "unrecognized service ID" log messages.
  17067. Fixes bug 18600; bugfix on 0.2.4.11-alpha.
  17068. - Downgrade logs and backtraces about IP versions to info-level.
  17069. Only log backtraces once each time tor runs. Assists in diagnosing
  17070. bug 18351; bugfix on 0.2.8.1-alpha. Reported by sysrqb and
  17071. Christian, patch by teor.
  17072. o Minor bugfixes (memory safety):
  17073. - Avoid freeing an uninitialized pointer when opening a socket fails
  17074. in get_interface_addresses_ioctl(). Fixes bug 18454; bugfix on
  17075. 0.2.3.11-alpha. Reported by toralf and "cypherpunks", patch
  17076. by teor.
  17077. - Correctly duplicate addresses in get_interface_address6_list().
  17078. Fixes bug 18454; bugfix on 0.2.8.1-alpha. Reported by toralf,
  17079. patch by "cypherpunks".
  17080. - Fix a memory leak in tor-gencert. Fixes part of bug 18672; bugfix
  17081. on 0.2.0.1-alpha.
  17082. - Fix a memory leak in "tor --list-fingerprint". Fixes part of bug
  17083. 18672; bugfix on 0.2.5.1-alpha.
  17084. o Minor bugfixes (private directory):
  17085. - Prevent a race condition when creating private directories. Fixes
  17086. part of bug 17852; bugfix on 0.0.2pre13. Part of ticket 17852.
  17087. Patch from jsturgix. Found with Flawfinder.
  17088. o Minor bugfixes (test networks, IPv6):
  17089. - Allow internal IPv6 addresses in descriptors in test networks.
  17090. Fixes bug 17153; bugfix on 0.2.3.16-alpha. Patch by teor, reported
  17091. by karsten.
  17092. o Minor bugfixes (testing):
  17093. - We no longer disable assertions in the unit tests when coverage is
  17094. enabled. Instead, we require you to say --disable-asserts-in-tests
  17095. to the configure script if you need assertions disabled in the
  17096. unit tests (for example, if you want to perform branch coverage).
  17097. Fixes bug 18242; bugfix on 0.2.7.1-alpha.
  17098. o Minor bugfixes (time parsing):
  17099. - Avoid overflow in tor_timegm when parsing dates in and after 2038
  17100. on platforms with 32-bit time_t. Fixes bug 18479; bugfix on
  17101. 0.0.2pre14. Patch by teor.
  17102. o Minor bugfixes (tor-gencert):
  17103. - Correctly handle the case where an authority operator enters a
  17104. passphrase but sends an EOF before sending a newline. Fixes bug
  17105. 17443; bugfix on 0.2.0.20-rc. Found by junglefowl.
  17106. o Code simplification and refactoring:
  17107. - Quote all the string interpolations in configure.ac -- even those
  17108. which we are pretty sure can't contain spaces. Closes ticket
  17109. 17744. Patch from zerosion.
  17110. - Remove specialized code for non-inplace AES_CTR. 99% of our AES is
  17111. inplace, so there's no need to have a separate implementation for
  17112. the non-inplace code. Closes ticket 18258. Patch from Malek.
  17113. - Simplify return types for some crypto functions that can't
  17114. actually fail. Patch from Hassan Alsibyani. Closes ticket 18259.
  17115. o Documentation:
  17116. - Change build messages to refer to "Fedora" instead of "Fedora
  17117. Core", and "dnf" instead of "yum". Closes tickets 18459 and 18426.
  17118. Patches from "icanhasaccount" and "cypherpunks".
  17119. o Removed features:
  17120. - We no longer maintain an internal freelist in memarea.c.
  17121. Allocators should be good enough to make this code unnecessary,
  17122. and it's doubtful that it ever had any performance benefit.
  17123. o Testing:
  17124. - Fix several warnings from clang's address sanitizer produced in
  17125. the unit tests.
  17126. - Treat backtrace test failures as expected on FreeBSD until we
  17127. solve bug 17808. Closes ticket 18204.
  17128. Changes in version 0.2.8.1-alpha - 2016-02-04
  17129. Tor 0.2.8.1-alpha is the first alpha release in its series. It
  17130. includes numerous small features and bugfixes against previous Tor
  17131. versions, and numerous small infrastructure improvements. The most
  17132. notable features are a set of improvements to the directory subsystem.
  17133. o Major features (security, Linux):
  17134. - When Tor starts as root on Linux and is told to switch user ID, it
  17135. can now retain the capability to bind to low ports. By default,
  17136. Tor will do this only when it's switching user ID and some low
  17137. ports have been configured. You can change this behavior with the
  17138. new option KeepBindCapabilities. Closes ticket 8195.
  17139. o Major features (directory system):
  17140. - When bootstrapping multiple consensus downloads at a time, use the
  17141. first one that starts downloading, and close the rest. This
  17142. reduces failures when authorities or fallback directories are slow
  17143. or down. Together with the code for feature 15775, this feature
  17144. should reduces failures due to fallback churn. Implements ticket
  17145. 4483. Patch by "teor". Implements IPv4 portions of proposal 210 by
  17146. "mikeperry" and "teor".
  17147. - Include a trial list of 21 default fallback directories, generated
  17148. in January 2016, based on an opt-in survey of suitable relays.
  17149. Doing this should make clients bootstrap more quickly and reliably,
  17150. and reduce the load on the directory authorities. Closes ticket
  17151. 15775. Patch by "teor".
  17152. Candidates identified using an OnionOO script by "weasel", "teor",
  17153. "gsathya", and "karsten".
  17154. - Previously only relays that explicitly opened a directory port
  17155. (DirPort) accepted directory requests from clients. Now all
  17156. relays, with and without a DirPort, accept and serve tunneled
  17157. directory requests that they receive through their ORPort. You can
  17158. disable this behavior using the new DirCache option. Closes
  17159. ticket 12538.
  17160. o Major key updates:
  17161. - Update the V3 identity key for the dannenberg directory authority:
  17162. it was changed on 18 November 2015. Closes task 17906. Patch
  17163. by "teor".
  17164. o Minor features (security, clock):
  17165. - Warn when the system clock appears to move back in time (when the
  17166. state file was last written in the future). Tor doesn't know that
  17167. consensuses have expired if the clock is in the past. Patch by
  17168. "teor". Implements ticket 17188.
  17169. o Minor features (security, exit policies):
  17170. - ExitPolicyRejectPrivate now rejects more private addresses by
  17171. default. Specifically, it now rejects the relay's outbound bind
  17172. addresses (if configured), and the relay's configured port
  17173. addresses (such as ORPort and DirPort). Fixes bug 17027; bugfix on
  17174. 0.2.0.11-alpha. Patch by "teor".
  17175. o Minor features (security, memory erasure):
  17176. - Set the unused entries in a smartlist to NULL. This helped catch
  17177. a (harmless) bug, and shouldn't affect performance too much.
  17178. Implements ticket 17026.
  17179. - Use SecureMemoryWipe() function to securely clean memory on
  17180. Windows. Previously we'd use OpenSSL's OPENSSL_cleanse() function.
  17181. Implements feature 17986.
  17182. - Use explicit_bzero or memset_s when present. Previously, we'd use
  17183. OpenSSL's OPENSSL_cleanse() function. Closes ticket 7419; patches
  17184. from <logan@hackers.mu> and <selven@hackers.mu>.
  17185. - Make memwipe() do nothing when passed a NULL pointer or buffer of
  17186. zero size. Check size argument to memwipe() for underflow. Fixes
  17187. bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
  17188. patch by "teor".
  17189. o Minor features (security, RNG):
  17190. - Adjust Tor's use of OpenSSL's RNG APIs so that they absolutely,
  17191. positively are not allowed to fail. Previously we depended on
  17192. internal details of OpenSSL's behavior. Closes ticket 17686.
  17193. - Never use the system entropy output directly for anything besides
  17194. seeding the PRNG. When we want to generate important keys, instead
  17195. of using system entropy directly, we now hash it with the PRNG
  17196. stream. This may help resist certain attacks based on broken OS
  17197. entropy implementations. Closes part of ticket 17694.
  17198. - Use modern system calls (like getentropy() or getrandom()) to
  17199. generate strong entropy on platforms that have them. Closes
  17200. ticket 13696.
  17201. o Minor features (accounting):
  17202. - Added two modes to the AccountingRule option: One for limiting
  17203. only the number of bytes sent ("AccountingRule out"), and one for
  17204. limiting only the number of bytes received ("AccountingRule in").
  17205. Closes ticket 15989; patch from "unixninja92".
  17206. o Minor features (build):
  17207. - Since our build process now uses "make distcheck", we no longer
  17208. force "make dist" to depend on "make check". Closes ticket 17893;
  17209. patch from "cypherpunks."
  17210. - Tor now builds successfully with the recent OpenSSL 1.1
  17211. development branch, and with the latest LibreSSL. Closes tickets
  17212. 17549, 17921, and 17984.
  17213. o Minor features (controller):
  17214. - Adds the FallbackDir entries to 'GETINFO config/defaults'. Closes
  17215. tickets 16774 and 17817. Patch by George Tankersley.
  17216. - New 'GETINFO hs/service/desc/id/' command to retrieve a hidden
  17217. service descriptor from a service's local hidden service
  17218. descriptor cache. Closes ticket 14846.
  17219. - Add 'GETINFO exit-policy/reject-private/[default,relay]', so
  17220. controllers can examine the the reject rules added by
  17221. ExitPolicyRejectPrivate. This makes it easier for stem to display
  17222. exit policies.
  17223. o Minor features (crypto):
  17224. - Add SHA512 support to crypto.c. Closes ticket 17663; patch from
  17225. George Tankersley.
  17226. - Add SHA3 and SHAKE support to crypto.c. Closes ticket 17783.
  17227. - When allocating a digest state object, allocate no more space than
  17228. we actually need. Previously, we would allocate as much space as
  17229. the state for the largest algorithm would need. This change saves
  17230. up to 672 bytes per circuit. Closes ticket 17796.
  17231. - Improve performance when hashing non-multiple of 8 sized buffers,
  17232. based on Andrew Moon's public domain SipHash-2-4 implementation.
  17233. Fixes bug 17544; bugfix on 0.2.5.3-alpha.
  17234. o Minor features (directory downloads):
  17235. - Wait for busy authorities and fallback directories to become non-
  17236. busy when bootstrapping. (A similar change was made in 6c443e987d
  17237. for directory caches chosen from the consensus.) Closes ticket
  17238. 17864; patch by "teor".
  17239. - Add UseDefaultFallbackDirs, which enables any hard-coded fallback
  17240. directory mirrors. The default is 1; set it to 0 to disable
  17241. fallbacks. Implements ticket 17576. Patch by "teor".
  17242. o Minor features (geoip):
  17243. - Update geoip and geoip6 to the January 5 2016 Maxmind GeoLite2
  17244. Country database.
  17245. o Minor features (IPv6):
  17246. - Add an argument 'ipv6=address:orport' to the DirAuthority and
  17247. FallbackDir torrc options, to specify an IPv6 address for an
  17248. authority or fallback directory. Add hard-coded ipv6 addresses for
  17249. directory authorities that have them. Closes ticket 17327; patch
  17250. from Nick Mathewson and "teor".
  17251. - Add address policy assume_action support for IPv6 addresses.
  17252. - Limit IPv6 mask bits to 128.
  17253. - Warn when comparing against an AF_UNSPEC address in a policy, it's
  17254. almost always a bug. Closes ticket 17863; patch by "teor".
  17255. - Allow users to configure directory authorities and fallback
  17256. directory servers with IPv6 addresses and ORPorts. Resolves
  17257. ticket 6027.
  17258. - routerset_parse now accepts IPv6 literal addresses. Fixes bug
  17259. 17060; bugfix on 0.2.1.3-alpha. Patch by "teor".
  17260. - Make tor_ersatz_socketpair work on IPv6-only systems. Fixes bug
  17261. 17638; bugfix on 0.0.2pre8. Patch by "teor".
  17262. o Minor features (logging):
  17263. - When logging to syslog, allow a tag to be added to the syslog
  17264. identity (the string prepended to every log message). The tag can
  17265. be configured with SyslogIdentityTag and defaults to none. Setting
  17266. it to "foo" will cause logs to be tagged as "Tor-foo". Closes
  17267. ticket 17194.
  17268. o Minor features (portability):
  17269. - Use timingsafe_memcmp() where available. Closes ticket 17944;
  17270. patch from <logan@hackers.mu>.
  17271. o Minor features (relay, address discovery):
  17272. - Add a family argument to get_interface_addresses_raw() and
  17273. subfunctions to make network interface address interogation more
  17274. efficient. Now Tor can specifically ask for IPv4, IPv6 or both
  17275. types of interfaces from the operating system. Resolves
  17276. ticket 17950.
  17277. - When get_interface_address6_list(.,AF_UNSPEC,.) is called and
  17278. fails to enumerate interface addresses using the platform-specific
  17279. API, have it rely on the UDP socket fallback technique to try and
  17280. find out what IP addresses (both IPv4 and IPv6) our machine has.
  17281. Resolves ticket 17951.
  17282. o Minor features (replay cache):
  17283. - The replay cache now uses SHA256 instead of SHA1. Implements
  17284. feature 8961. Patch by "teor", issue reported by "rransom".
  17285. o Minor features (unix file permissions):
  17286. - Defer creation of Unix sockets until after setuid. This avoids
  17287. needing CAP_CHOWN and CAP_FOWNER when using systemd's
  17288. CapabilityBoundingSet, or chown and fowner when using SELinux.
  17289. Implements part of ticket 17562. Patch from Jamie Nguyen.
  17290. - If any directory created by Tor is marked as group readable, the
  17291. filesystem group is allowed to be either the default GID or the
  17292. root user. Allowing root to read the DataDirectory prevents the
  17293. need for CAP_READ_SEARCH when using systemd's
  17294. CapabilityBoundingSet, or dac_read_search when using SELinux.
  17295. Implements part of ticket 17562. Patch from Jamie Nguyen.
  17296. - Introduce a new DataDirectoryGroupReadable option. If it is set to
  17297. 1, the DataDirectory will be made readable by the default GID.
  17298. Implements part of ticket 17562. Patch from Jamie Nguyen.
  17299. o Minor bugfixes (accounting):
  17300. - The max bandwidth when using 'AccountRule sum' is now correctly
  17301. logged. Fixes bug 18024; bugfix on 0.2.6.1-alpha. Patch
  17302. from "unixninja92".
  17303. o Minor bugfixes (code correctness):
  17304. - When closing an entry connection, generate a warning if we should
  17305. have sent an end cell for it but we haven't. Fixes bug 17876;
  17306. bugfix on 0.2.3.2-alpha.
  17307. - Assert that allocated memory held by the reputation code is freed
  17308. according to its internal counters. Fixes bug 17753; bugfix
  17309. on 0.1.1.1-alpha.
  17310. - Assert when the TLS contexts fail to initialize. Fixes bug 17683;
  17311. bugfix on 0.0.6.
  17312. o Minor bugfixes (compilation):
  17313. - Mark all object files that include micro-revision.i as depending
  17314. on it, so as to make parallel builds more reliable. Fixes bug
  17315. 17826; bugfix on 0.2.5.1-alpha.
  17316. - Don't try to use the pthread_condattr_setclock() function unless
  17317. it actually exists. Fixes compilation on NetBSD-6.x. Fixes bug
  17318. 17819; bugfix on 0.2.6.3-alpha.
  17319. - Fix backtrace compilation on FreeBSD. Fixes bug 17827; bugfix
  17320. on 0.2.5.2-alpha.
  17321. - Fix compilation of sandbox.c with musl-libc. Fixes bug 17347;
  17322. bugfix on 0.2.5.1-alpha. Patch from 'jamestk'.
  17323. - Fix search for libevent libraries on OpenBSD (and other systems
  17324. that install libevent 1 and libevent 2 in parallel). Fixes bug
  17325. 16651; bugfix on 0.1.0.7-rc. Patch from "rubiate".
  17326. - Isolate environment variables meant for tests from the rest of the
  17327. build system. Fixes bug 17818; bugfix on 0.2.7.3-rc.
  17328. - Replace usage of 'INLINE' with 'inline'. Fixes bug 17804; bugfix
  17329. on 0.0.2pre8.
  17330. - Remove config.log only from make distclean, not from make clean.
  17331. Fixes bug 17924; bugfix on 0.2.4.1-alpha.
  17332. o Minor bugfixes (crypto):
  17333. - Check the return value of HMAC() and assert on failure. Fixes bug
  17334. 17658; bugfix on 0.2.3.6-alpha. Patch by "teor".
  17335. o Minor bugfixes (fallback directories):
  17336. - Mark fallbacks as "too busy" when they return a 503 response,
  17337. rather than just marking authorities. Fixes bug 17572; bugfix on
  17338. 0.2.4.7-alpha. Patch by "teor".
  17339. o Minor bugfixes (IPv6):
  17340. - Update the limits in max_dl_per_request for IPv6 address length.
  17341. Fixes bug 17573; bugfix on 0.2.1.5-alpha.
  17342. o Minor bugfixes (linux seccomp2 sandbox):
  17343. - Fix a crash when using offline master ed25519 keys with the Linux
  17344. seccomp2 sandbox enabled. Fixes bug 17675; bugfix on 0.2.7.3-rc.
  17345. o Minor bugfixes (logging):
  17346. - In log messages that include a function name, use __FUNCTION__
  17347. instead of __PRETTY_FUNCTION__. In GCC, these are synonymous, but
  17348. with clang __PRETTY_FUNCTION__ has extra information we don't
  17349. need. Fixes bug 16563; bugfix on 0.0.2pre8. Fix by Tom van
  17350. der Woerdt.
  17351. - Remove needless quotes from a log message about unparseable
  17352. addresses. Fixes bug 17843; bugfix on 0.2.3.3-alpha.
  17353. o Minor bugfixes (portability):
  17354. - Remove an #endif from configure.ac so that we correctly detect the
  17355. presence of in6_addr.s6_addr32. Fixes bug 17923; bugfix
  17356. on 0.2.0.13-alpha.
  17357. o Minor bugfixes (relays):
  17358. - Check that both the ORPort and DirPort (if present) are reachable
  17359. before publishing a relay descriptor. Otherwise, relays publish a
  17360. descriptor with DirPort 0 when the DirPort reachability test takes
  17361. longer than the ORPort reachability test. Fixes bug 18050; bugfix
  17362. on 0.1.0.1-rc. Reported by "starlight", patch by "teor".
  17363. o Minor bugfixes (relays, hidden services):
  17364. - Refuse connection requests to private OR addresses unless
  17365. ExtendAllowPrivateAddresses is set. Previously, tor would connect,
  17366. then refuse to send any cells to a private address. Fixes bugs
  17367. 17674 and 8976; bugfix on 0.2.3.21-rc. Patch by "teor".
  17368. o Minor bugfixes (safe logging):
  17369. - When logging a malformed hostname received through socks4, scrub
  17370. it if SafeLogging says we should. Fixes bug 17419; bugfix
  17371. on 0.1.1.16-rc.
  17372. o Minor bugfixes (statistics code):
  17373. - Consistently check for overflow in round_*_to_next_multiple_of
  17374. functions, and add unit tests with additional and maximal values.
  17375. Fixes part of bug 13192; bugfix on 0.2.2.1-alpha.
  17376. - Handle edge cases in the laplace functions: avoid division by
  17377. zero, avoid taking the log of zero, and silence clang type
  17378. conversion warnings using round and trunc. Add unit tests for edge
  17379. cases with maximal values. Fixes part of bug 13192; bugfix
  17380. on 0.2.6.2-alpha.
  17381. o Minor bugfixes (testing):
  17382. - The test for log_heartbeat was incorrectly failing in timezones
  17383. with non-integer offsets. Instead of comparing the end of the time
  17384. string against a constant, compare it to the output of
  17385. format_local_iso_time when given the correct input. Fixes bug
  17386. 18039; bugfix on 0.2.5.4-alpha.
  17387. - Make unit tests pass on IPv6-only systems, and systems without
  17388. localhost addresses (like some FreeBSD jails). Fixes bug 17632;
  17389. bugfix on 0.2.7.3-rc. Patch by "teor".
  17390. - Fix a memory leak in the ntor test. Fixes bug 17778; bugfix
  17391. on 0.2.4.8-alpha.
  17392. - Check the full results of SHA256 and SHA512 digests in the unit
  17393. tests. Bugfix on 0.2.2.4-alpha. Patch by "teor".
  17394. o Code simplification and refactoring:
  17395. - Move logging of redundant policy entries in
  17396. policies_parse_exit_policy_internal into its own function. Closes
  17397. ticket 17608; patch from "juce".
  17398. - Extract the more complicated parts of circuit_mark_for_close()
  17399. into a new function that we run periodically before circuits are
  17400. freed. This change removes more than half of the functions
  17401. currently in the "blob". Closes ticket 17218.
  17402. - Clean up a little duplicated code in
  17403. crypto_expand_key_material_TAP(). Closes ticket 17587; patch
  17404. from "pfrankw".
  17405. - Decouple the list of streams waiting to be attached to circuits
  17406. from the overall connection list. This change makes it possible to
  17407. attach streams quickly while simplifying Tor's callgraph and
  17408. avoiding O(N) scans of the entire connection list. Closes
  17409. ticket 17590.
  17410. - When a direct directory request fails immediately on launch,
  17411. instead of relaunching that request from inside the code that
  17412. launches it, instead mark the connection for teardown. This change
  17413. simplifies Tor's callback and prevents the directory-request
  17414. launching code from invoking itself recursively. Closes
  17415. ticket 17589
  17416. - Remove code for configuring OpenSSL dynamic locks; OpenSSL doesn't
  17417. use them. Closes ticket 17926.
  17418. o Documentation:
  17419. - Add a description of the correct use of the '--keygen' command-
  17420. line option. Closes ticket 17583; based on text by 's7r'.
  17421. - Document the minimum HeartbeatPeriod value. Closes ticket 15638.
  17422. - Explain actual minima for BandwidthRate. Closes ticket 16382.
  17423. - Fix a minor formatting typo in the manpage. Closes ticket 17791.
  17424. - Mention torspec URL in the manpage and point the reader to it
  17425. whenever we mention a document that belongs in torspce. Fixes
  17426. issue 17392.
  17427. o Removed features:
  17428. - Remove client-side support for connecting to Tor relays running
  17429. versions of Tor before 0.2.3.6-alpha. These relays didn't support
  17430. the v3 TLS handshake protocol, and are no longer allowed on the
  17431. Tor network. Implements the client side of ticket 11150. Based on
  17432. patches by Tom van der Woerdt.
  17433. o Testing:
  17434. - Add unit tests to check for common RNG failure modes, such as
  17435. returning all zeroes, identical values, or incrementing values
  17436. (OpenSSL's rand_predictable feature). Patch by "teor".
  17437. - Log more information when the backtrace tests fail. Closes ticket
  17438. 17892. Patch from "cypherpunks."
  17439. - Always test both ed25519 backends, so that we can be sure that our
  17440. batch-open replacement code works. Part of ticket 16794.
  17441. - Cover dns_resolve_impl() in dns.c with unit tests. Implements a
  17442. portion of ticket 16831.
  17443. - More unit tests for compat_libevent.c, procmon.c, tortls.c,
  17444. util_format.c, directory.c, and options_validate.c. Closes tickets
  17445. 17075, 17082, 17084, 17003, and 17076 respectively. Patches from
  17446. Ola Bini.
  17447. - Unit tests for directory_handle_command_get. Closes ticket 17004.
  17448. Patch from Reinaldo de Souza Jr.
  17449. Changes in version 0.2.7.6 - 2015-12-10
  17450. Tor version 0.2.7.6 fixes a major bug in entry guard selection, as
  17451. well as a minor bug in hidden service reliability.
  17452. o Major bugfixes (guard selection):
  17453. - Actually look at the Guard flag when selecting a new directory
  17454. guard. When we implemented the directory guard design, we
  17455. accidentally started treating all relays as if they have the Guard
  17456. flag during guard selection, leading to weaker anonymity and worse
  17457. performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
  17458. by Mohsen Imani.
  17459. o Minor features (geoip):
  17460. - Update geoip and geoip6 to the December 1 2015 Maxmind GeoLite2
  17461. Country database.
  17462. o Minor bugfixes (compilation):
  17463. - When checking for net/pfvar.h, include netinet/in.h if possible.
  17464. This fixes transparent proxy detection on OpenBSD. Fixes bug
  17465. 17551; bugfix on 0.1.2.1-alpha. Patch from "rubiate".
  17466. - Fix a compilation warning with Clang 3.6: Do not check the
  17467. presence of an address which can never be NULL. Fixes bug 17781.
  17468. o Minor bugfixes (correctness):
  17469. - When displaying an IPv6 exit policy, include the mask bits
  17470. correctly even when the number is greater than 31. Fixes bug
  17471. 16056; bugfix on 0.2.4.7-alpha. Patch from "gturner".
  17472. - The wrong list was used when looking up expired intro points in a
  17473. rend service object, causing what we think could be reachability
  17474. issues for hidden services, and triggering a BUG log. Fixes bug
  17475. 16702; bugfix on 0.2.7.2-alpha.
  17476. - Fix undefined behavior in the tor_cert_checksig function. Fixes
  17477. bug 17722; bugfix on 0.2.7.2-alpha.
  17478. Changes in version 0.2.7.5 - 2015-11-20
  17479. The Tor 0.2.7 release series is dedicated to the memory of Tor user
  17480. and privacy advocate Caspar Bowden (1961-2015). Caspar worked
  17481. tirelessly to advocate human rights regardless of national borders,
  17482. and oppose the encroachments of mass surveillance. He opposed national
  17483. exceptionalism, he brought clarity to legal and policy debates, he
  17484. understood and predicted the impact of mass surveillance on the world,
  17485. and he laid the groundwork for resisting it. While serving on the Tor
  17486. Project's board of directors, he brought us his uncompromising focus
  17487. on technical excellence in the service of humankind. Caspar was an
  17488. inimitable force for good and a wonderful friend. He was kind,
  17489. humorous, generous, gallant, and believed we should protect one
  17490. another without exception. We honor him here for his ideals, his
  17491. efforts, and his accomplishments. Please honor his memory with works
  17492. that would make him proud.
  17493. Tor 0.2.7.5 is the first stable release in the Tor 0.2.7 series.
  17494. The 0.2.7 series adds a more secure identity key type for relays,
  17495. improves cryptography performance, resolves several longstanding
  17496. hidden-service performance issues, improves controller support for
  17497. hidden services, and includes small bugfixes and performance
  17498. improvements throughout the program. This release series also includes
  17499. more tests than before, and significant simplifications to which parts
  17500. of Tor invoke which others.
  17501. (This release contains no code changes since 0.2.7.4-rc.)
  17502. Changes in version 0.2.7.4-rc - 2015-10-21
  17503. Tor 0.2.7.4-rc is the second release candidate in the 0.2.7 series. It
  17504. fixes some important memory leaks, and a scary-looking (but mostly
  17505. harmless in practice) invalid-read bug. It also has a few small
  17506. bugfixes, notably fixes for compilation and portability on different
  17507. platforms. If no further significant bounds are found, the next
  17508. release will the the official stable release.
  17509. o Major bugfixes (security, correctness):
  17510. - Fix an error that could cause us to read 4 bytes before the
  17511. beginning of an openssl string. This bug could be used to cause
  17512. Tor to crash on systems with unusual malloc implementations, or
  17513. systems with unusual hardening installed. Fixes bug 17404; bugfix
  17514. on 0.2.3.6-alpha.
  17515. o Major bugfixes (correctness):
  17516. - Fix a use-after-free bug in validate_intro_point_failure(). Fixes
  17517. bug 17401; bugfix on 0.2.7.3-rc.
  17518. o Major bugfixes (memory leaks):
  17519. - Fix a memory leak in ed25519 batch signature checking. Fixes bug
  17520. 17398; bugfix on 0.2.6.1-alpha.
  17521. - Fix a memory leak in rend_cache_failure_entry_free(). Fixes bug
  17522. 17402; bugfix on 0.2.7.3-rc.
  17523. - Fix a memory leak when reading an expired signing key from disk.
  17524. Fixes bug 17403; bugfix on 0.2.7.2-rc.
  17525. o Minor features (geoIP):
  17526. - Update geoip and geoip6 to the October 9 2015 Maxmind GeoLite2
  17527. Country database.
  17528. o Minor bugfixes (compilation):
  17529. - Repair compilation with the most recent (unreleased, alpha)
  17530. vesions of OpenSSL 1.1. Fixes part of ticket 17237.
  17531. - Fix an integer overflow warning in test_crypto_slow.c. Fixes bug
  17532. 17251; bugfix on 0.2.7.2-alpha.
  17533. - Fix compilation of sandbox.c with musl-libc. Fixes bug 17347;
  17534. bugfix on 0.2.5.1-alpha. Patch from 'jamestk'.
  17535. o Minor bugfixes (portability):
  17536. - Use libexecinfo on FreeBSD to enable backtrace support. Fixes
  17537. part of bug 17151; bugfix on 0.2.5.2-alpha. Patch from
  17538. Marcin Cieślak.
  17539. o Minor bugfixes (sandbox):
  17540. - Add the "hidserv-stats" filename to our sandbox filter for the
  17541. HiddenServiceStatistics option to work properly. Fixes bug 17354;
  17542. bugfix on 0.2.6.2-alpha. Patch from David Goulet.
  17543. o Minor bugfixes (testing):
  17544. - Add unit tests for get_interface_address* failure cases. Fixes bug
  17545. 17173; bugfix on 0.2.7.3-rc. Patch by fk/teor.
  17546. - Fix breakage when running 'make check' with BSD make. Fixes bug
  17547. 17154; bugfix on 0.2.7.3-rc. Patch by Marcin Cieślak.
  17548. - Make the get_ifaddrs_* unit tests more tolerant of different
  17549. network configurations. (Don't assume every test box has an IPv4
  17550. address, and don't assume every test box has a non-localhost
  17551. address.) Fixes bug 17255; bugfix on 0.2.7.3-rc. Patch by "teor".
  17552. - Skip backtrace tests when backtrace support is not compiled in.
  17553. Fixes part of bug 17151; bugfix on 0.2.7.1-alpha. Patch from
  17554. Marcin Cieślak.
  17555. o Documentation:
  17556. - Fix capitalization of SOCKS in sample torrc. Closes ticket 15609.
  17557. - Note that HiddenServicePorts can take a unix domain socket. Closes
  17558. ticket 17364.
  17559. Changes in version 0.2.7.3-rc - 2015-09-25
  17560. Tor 0.2.7.3-rc is the first release candidate in the 0.2.7 series. It
  17561. contains numerous usability fixes for Ed25519 keys, safeguards against
  17562. several misconfiguration problems, significant simplifications to
  17563. Tor's callgraph, and numerous bugfixes and small features.
  17564. This is the most tested release of Tor to date. The unit tests cover
  17565. 39.40% of the code, and the integration tests (accessible with "make
  17566. test-full-online", requiring stem and chutney and a network
  17567. connection) raise the coverage to 64.49%.
  17568. o Major features (security, hidden services):
  17569. - Hidden services, if using the EntryNodes option, are required to
  17570. use more than one EntryNode, in order to avoid a guard discovery
  17571. attack. (This would only affect people who had configured hidden
  17572. services and manually specified the EntryNodes option with a
  17573. single entry-node. The impact was that it would be easy to
  17574. remotely identify the guard node used by such a hidden service.
  17575. See ticket for more information.) Fixes ticket 14917.
  17576. o Major features (Ed25519 keys, keypinning):
  17577. - The key-pinning option on directory authorities is now advisory-
  17578. only by default. In a future version, or when the AuthDirPinKeys
  17579. option is set, pins are enforced again. Disabling key-pinning
  17580. seemed like a good idea so that we can survive the fallout of any
  17581. usability problems associated with Ed25519 keys. Closes
  17582. ticket 17135.
  17583. o Major features (Ed25519 performance):
  17584. - Improve the speed of Ed25519 operations and Curve25519 keypair
  17585. generation when built targeting 32 bit x86 platforms with SSE2
  17586. available. Implements ticket 16535.
  17587. - Improve the runtime speed of Ed25519 signature verification by
  17588. using Ed25519-donna's batch verification support. Implements
  17589. ticket 16533.
  17590. o Major features (performance testing):
  17591. - The test-network.sh script now supports performance testing.
  17592. Requires corresponding chutney performance testing changes. Patch
  17593. by "teor". Closes ticket 14175.
  17594. o Major features (relay, Ed25519):
  17595. - Significant usability improvements for Ed25519 key management. Log
  17596. messages are better, and the code can recover from far more
  17597. failure conditions. Thanks to "s7r" for reporting and diagnosing
  17598. so many of these!
  17599. - Add a new OfflineMasterKey option to tell Tor never to try loading
  17600. or generating a secret Ed25519 identity key. You can use this in
  17601. combination with tor --keygen to manage offline and/or encrypted
  17602. Ed25519 keys. Implements ticket 16944.
  17603. - Add a --newpass option to allow changing or removing the
  17604. passphrase of an encrypted key with tor --keygen. Implements part
  17605. of ticket 16769.
  17606. - On receiving a HUP signal, check to see whether the Ed25519
  17607. signing key has changed, and reload it if so. Closes ticket 16790.
  17608. o Major bugfixes (relay, Ed25519):
  17609. - Avoid crashing on 'tor --keygen'. Fixes bug 16679; bugfix on
  17610. 0.2.7.2-alpha. Reported by "s7r".
  17611. - Improve handling of expired signing keys with offline master keys.
  17612. Fixes bug 16685; bugfix on 0.2.7.2-alpha. Reported by "s7r".
  17613. o Minor features (client-side privacy):
  17614. - New KeepAliveIsolateSOCKSAuth option to indefinitely extend circuit
  17615. lifespan when IsolateSOCKSAuth and streams with SOCKS
  17616. authentication are attached to the circuit. This allows
  17617. applications like TorBrowser to manage circuit lifetime on their
  17618. own. Implements feature 15482.
  17619. - When logging malformed hostnames from SOCKS5 requests, respect
  17620. SafeLogging configuration. Fixes bug 16891; bugfix on 0.1.1.16-rc.
  17621. o Minor features (compilation):
  17622. - Give a warning as early as possible when trying to build with an
  17623. unsupported OpenSSL version. Closes ticket 16901.
  17624. - Fail during configure if we're trying to build against an OpenSSL
  17625. built without ECC support. Fixes bug 17109, bugfix on 0.2.7.1-alpha
  17626. which started requiring ECC.
  17627. o Minor features (geoip):
  17628. - Update geoip and geoip6 to the September 3 2015 Maxmind GeoLite2
  17629. Country database.
  17630. o Minor features (hidden services):
  17631. - Relays need to have the Fast flag to get the HSDir flag. As this
  17632. is being written, we'll go from 2745 HSDirs down to 2342, a ~14%
  17633. drop. This change should make some attacks against the hidden
  17634. service directory system harder. Fixes ticket 15963.
  17635. - Turn on hidden service statistics collection by setting the torrc
  17636. option HiddenServiceStatistics to "1" by default. (This keeps
  17637. track only of the fraction of traffic used by hidden services, and
  17638. the total number of hidden services in existence.) Closes
  17639. ticket 15254.
  17640. - Client now uses an introduction point failure cache to know when
  17641. to fetch or keep a descriptor in their cache. Previously, failures
  17642. were recorded implicitly, but not explicitly remembered. Closes
  17643. ticket 16389.
  17644. o Minor features (testing, authorities, documentation):
  17645. - New TestingDirAuthVote{Exit,Guard,HSDir}IsStrict flags to
  17646. explicitly manage consensus flags in testing networks. Patch by
  17647. "robgjansen", modified by "teor". Implements part of ticket 14882.
  17648. o Minor bugfixes (security, exit policies):
  17649. - ExitPolicyRejectPrivate now also rejects the relay's published
  17650. IPv6 address (if any), and any publicly routable IPv4 or IPv6
  17651. addresses on any local interfaces. ticket 17027. Patch by "teor".
  17652. Fixes bug 17027; bugfix on 0.2.0.11-alpha.
  17653. o Minor bug fixes (torrc exit policies):
  17654. - In torrc, "accept6 *" and "reject6 *" ExitPolicy lines now only
  17655. produce IPv6 wildcard addresses. Previously they would produce
  17656. both IPv4 and IPv6 wildcard addresses. Patch by "teor". Fixes part
  17657. of bug 16069; bugfix on 0.2.4.7-alpha.
  17658. - When parsing torrc ExitPolicies, we now warn for a number of cases
  17659. where the user's intent is likely to differ from Tor's actual
  17660. behavior. These include: using an IPv4 address with an accept6 or
  17661. reject6 line; using "private" on an accept6 or reject6 line; and
  17662. including any ExitPolicy lines after accept *:* or reject *:*.
  17663. Related to ticket 16069.
  17664. - When parsing torrc ExitPolicies, we now issue an info-level
  17665. message when expanding an "accept/reject *" line to include both
  17666. IPv4 and IPv6 wildcard addresses. Related to ticket 16069.
  17667. - In each instance above, usage advice is provided to avoid the
  17668. message. Resolves ticket 16069. Patch by "teor". Fixes part of bug
  17669. 16069; bugfix on 0.2.4.7-alpha.
  17670. o Minor bugfixes (authority):
  17671. - Don't assign "HSDir" to a router if it isn't Valid and Running.
  17672. Fixes bug 16524; bugfix on 0.2.7.2-alpha.
  17673. - Downgrade log messages about Ed25519 key issues if they are in old
  17674. cached router descriptors. Fixes part of bug 16286; bugfix
  17675. on 0.2.7.2-alpha.
  17676. - When we find an Ed25519 key issue in a cached descriptor, stop
  17677. saying the descriptor was just "uploaded". Fixes another part of
  17678. bug 16286; bugfix on 0.2.7.2-alpha.
  17679. o Minor bugfixes (control port):
  17680. - Repair a warning and a spurious result when getting the maximum
  17681. number of file descriptors from the controller. Fixes bug 16697;
  17682. bugfix on 0.2.7.2-alpha.
  17683. o Minor bugfixes (correctness):
  17684. - When calling channel_free_list(), avoid calling smartlist_remove()
  17685. while inside a FOREACH loop. This partially reverts commit
  17686. 17356fe7fd96af where the correct SMARTLIST_DEL_CURRENT was
  17687. incorrectly removed. Fixes bug 16924; bugfix on 0.2.4.4-alpha.
  17688. o Minor bugfixes (documentation):
  17689. - Advise users on how to configure separate IPv4 and IPv6 exit
  17690. policies in the manpage and sample torrcs. Related to ticket 16069.
  17691. - Fix the usage message of tor-resolve(1) so that it no longer lists
  17692. the removed -F option. Fixes bug 16913; bugfix on 0.2.2.28-beta.
  17693. - Fix an error in the manual page and comments for
  17694. TestingDirAuthVoteHSDir[IsStrict], which suggested that a HSDir
  17695. required "ORPort connectivity". While this is true, it is in no
  17696. way unique to the HSDir flag. Of all the flags, only HSDirs need a
  17697. DirPort configured in order for the authorities to assign that
  17698. particular flag. Patch by "teor". Fixed as part of 14882; bugfix
  17699. on 0.2.6.3-alpha.
  17700. o Minor bugfixes (Ed25519):
  17701. - Fix a memory leak when reading router descriptors with expired
  17702. Ed25519 certificates. Fixes bug 16539; bugfix on 0.2.7.2-alpha.
  17703. o Minor bugfixes (linux seccomp2 sandbox):
  17704. - Allow bridge authorities to run correctly under the seccomp2
  17705. sandbox. Fixes bug 16964; bugfix on 0.2.5.1-alpha.
  17706. - Allow routers with ed25519 keys to run correctly under the
  17707. seccomp2 sandbox. Fixes bug 16965; bugfix on 0.2.7.2-alpha.
  17708. o Minor bugfixes (open file limit):
  17709. - Fix set_max_file_descriptors() to set by default the max open file
  17710. limit to the current limit when setrlimit() fails. Fixes bug
  17711. 16274; bugfix on 0.2.0.10-alpha. Patch by dgoulet.
  17712. o Minor bugfixes (portability):
  17713. - Try harder to normalize the exit status of the Tor process to the
  17714. standard-provided range. Fixes bug 16975; bugfix on every version
  17715. of Tor ever.
  17716. - Check correctly for Windows socket errors in the workqueue
  17717. backend. Fixes bug 16741; bugfix on 0.2.6.3-alpha.
  17718. - Fix the behavior of crypto_rand_time_range() when told to consider
  17719. times before 1970. (These times were possible when running in a
  17720. simulated network environment where time()'s output starts at
  17721. zero.) Fixes bug 16980; bugfix on 0.2.7.1-alpha.
  17722. - Restore correct operation of TLS client-cipher detection on
  17723. OpenSSL 1.1. Fixes bug 14047; bugfix on 0.2.7.2-alpha.
  17724. o Minor bugfixes (relay):
  17725. - Ensure that worker threads actually exit when a fatal error or
  17726. shutdown is indicated. This fix doesn't currently affect the
  17727. behavior of Tor, because Tor workers never indicates fatal error
  17728. or shutdown except in the unit tests. Fixes bug 16868; bugfix
  17729. on 0.2.6.3-alpha.
  17730. - Unblock threads before releasing the work queue mutex to ensure
  17731. predictable scheduling behavior. Fixes bug 16644; bugfix
  17732. on 0.2.6.3-alpha.
  17733. o Code simplification and refactoring:
  17734. - Change the function that's called when we need to retry all
  17735. downloads so that it only reschedules the downloads to happen
  17736. immediately, rather than launching them all at once itself. This
  17737. further simplifies Tor's callgraph.
  17738. - Move some format-parsing functions out of crypto.c and
  17739. crypto_curve25519.c into crypto_format.c and/or util_format.c.
  17740. - Move the client-only parts of init_keys() into a separate
  17741. function. Closes ticket 16763.
  17742. - Simplify the microdesc_free() implementation so that it no longer
  17743. appears (to code analysis tools) to potentially invoke a huge
  17744. suite of other microdesc functions.
  17745. - Simply the control graph further by deferring the inner body of
  17746. directory_all_unreachable() into a callback. Closes ticket 16762.
  17747. - Treat the loss of an owning controller as equivalent to a SIGTERM
  17748. signal. This removes a tiny amount of duplicated code, and
  17749. simplifies our callgraph. Closes ticket 16788.
  17750. - When generating an event to send to the controller, we no longer
  17751. put the event over the network immediately. Instead, we queue
  17752. these events, and use a Libevent callback to deliver them. This
  17753. change simplifies Tor's callgraph by reducing the number of
  17754. functions from which all other Tor functions are reachable. Closes
  17755. ticket 16695.
  17756. - Wrap Windows-only C files inside '#ifdef _WIN32' so that tools
  17757. that try to scan or compile every file on Unix won't decide that
  17758. they are broken.
  17759. - Remove the unused "nulterminate" argument from buf_pullup().
  17760. o Documentation:
  17761. - Recommend a 40 GB example AccountingMax in torrc.sample rather
  17762. than a 4 GB max. Closes ticket 16742.
  17763. - Include the TUNING document in our source tarball. It is referred
  17764. to in the ChangeLog and an error message. Fixes bug 16929; bugfix
  17765. on 0.2.6.1-alpha.
  17766. o Removed code:
  17767. - The internal pure-C tor-fw-helper tool is now removed from the Tor
  17768. distribution, in favor of the pure-Go clone available from
  17769. https://gitweb.torproject.org/tor-fw-helper.git/ . The libraries
  17770. used by the C tor-fw-helper are not, in our opinion, very
  17771. confidence- inspiring in their secure-programming techniques.
  17772. Closes ticket 13338.
  17773. - Remove the code that would try to aggressively flush controller
  17774. connections while writing to them. This code was introduced in
  17775. 0.1.2.7-alpha, in order to keep output buffers from exceeding
  17776. their limits. But there is no longer a maximum output buffer size,
  17777. and flushing data in this way caused some undesirable recursions
  17778. in our call graph. Closes ticket 16480.
  17779. o Testing:
  17780. - Make "bridges+hs" the default test network. This tests almost all
  17781. tor functionality during make test-network, while allowing tests
  17782. to succeed on non-IPv6 systems. Requires chutney commit 396da92 in
  17783. test-network-bridges-hs. Closes tickets 16945 (tor) and 16946
  17784. (chutney). Patches by "teor".
  17785. - Autodetect CHUTNEY_PATH if the chutney and Tor sources are side-
  17786. by-side in the same parent directory. Closes ticket 16903. Patch
  17787. by "teor".
  17788. - Use environment variables rather than autoconf substitutions to
  17789. send variables from the build system to the test scripts. This
  17790. change should be easier to maintain, and cause 'make distcheck' to
  17791. work better than before. Fixes bug 17148.
  17792. - Add a new set of callgraph analysis scripts that use clang to
  17793. produce a list of which Tor functions are reachable from which
  17794. other Tor functions. We're planning to use these to help simplify
  17795. our code structure by identifying illogical dependencies.
  17796. - Add new 'test-full' and 'test-full-online' targets to run all
  17797. tests, including integration tests with stem and chutney.
  17798. - Make the test-workqueue test work on Windows by initializing the
  17799. network before we begin.
  17800. - New make target (make test-network-all) to run multiple applicable
  17801. chutney test cases. Patch from Teor; closes 16953.
  17802. - Unit test dns_resolve(), dns_clip_ttl() and dns_get_expiry_ttl()
  17803. functions in dns.c. Implements a portion of ticket 16831.
  17804. - When building Tor with testing coverage enabled, run Chutney tests
  17805. (if any) using the 'tor-cov' coverage binary.
  17806. - When running test-network or test-stem, check for the absence of
  17807. stem/chutney before doing any build operations.
  17808. Changes in version 0.2.7.2-alpha - 2015-07-27
  17809. This, the second alpha in the Tor 0.2.7 series, has a number of new
  17810. features, including a way to manually pick the number of introduction
  17811. points for hidden services, and the much stronger Ed25519 signing key
  17812. algorithm for regular Tor relays (including support for encrypted
  17813. offline identity keys in the new algorithm).
  17814. Support for Ed25519 on relays is currently limited to signing router
  17815. descriptors; later alphas in this series will extend Ed25519 key
  17816. support to more parts of the Tor protocol.
  17817. o Major features (Ed25519 identity keys, Proposal 220):
  17818. - All relays now maintain a stronger identity key, using the Ed25519
  17819. elliptic curve signature format. This master key is designed so
  17820. that it can be kept offline. Relays also generate an online
  17821. signing key, and a set of other Ed25519 keys and certificates.
  17822. These are all automatically regenerated and rotated as needed.
  17823. Implements part of ticket 12498.
  17824. - Directory authorities now vote on Ed25519 identity keys along with
  17825. RSA1024 keys. Implements part of ticket 12498.
  17826. - Directory authorities track which Ed25519 identity keys have been
  17827. used with which RSA1024 identity keys, and do not allow them to
  17828. vary freely. Implements part of ticket 12498.
  17829. - Microdescriptors now include Ed25519 identity keys. Implements
  17830. part of ticket 12498.
  17831. - Add support for offline encrypted Ed25519 master keys. To use this
  17832. feature on your tor relay, run "tor --keygen" to make a new master
  17833. key (or to make a new signing key if you already have a master
  17834. key). Closes ticket 13642.
  17835. o Major features (Hidden services):
  17836. - Add the torrc option HiddenServiceNumIntroductionPoints, to
  17837. specify a fixed number of introduction points. Its maximum value
  17838. is 10 and default is 3. Using this option can increase a hidden
  17839. service's reliability under load, at the cost of making it more
  17840. visible that the hidden service is facing extra load. Closes
  17841. ticket 4862.
  17842. - Remove the adaptive algorithm for choosing the number of
  17843. introduction points, which used to change the number of
  17844. introduction points (poorly) depending on the number of
  17845. connections the HS sees. Closes ticket 4862.
  17846. o Major features (onion key cross-certification):
  17847. - Relay descriptors now include signatures of their own identity
  17848. keys, made using the TAP and ntor onion keys. These signatures
  17849. allow relays to prove ownership of their own onion keys. Because
  17850. of this change, microdescriptors will no longer need to include
  17851. RSA identity keys. Implements proposal 228; closes ticket 12499.
  17852. o Major features (performance):
  17853. - Improve the runtime speed of Ed25519 operations by using the
  17854. public-domain Ed25519-donna by Andrew M. ("floodyberry").
  17855. Implements ticket 16467.
  17856. - Improve the runtime speed of the ntor handshake by using an
  17857. optimized curve25519 basepoint scalarmult implementation from the
  17858. public-domain Ed25519-donna by Andrew M. ("floodyberry"), based on
  17859. ideas by Adam Langley. Implements ticket 9663.
  17860. o Major bugfixes (client-side privacy, also in 0.2.6.9):
  17861. - Properly separate out each SOCKSPort when applying stream
  17862. isolation. The error occurred because each port's session group
  17863. was being overwritten by a default value when the listener
  17864. connection was initialized. Fixes bug 16247; bugfix on
  17865. 0.2.6.3-alpha. Patch by "jojelino".
  17866. o Major bugfixes (hidden service clients, stability, also in 0.2.6.10):
  17867. - Stop refusing to store updated hidden service descriptors on a
  17868. client. This reverts commit 9407040c59218 (which indeed fixed bug
  17869. 14219, but introduced a major hidden service reachability
  17870. regression detailed in bug 16381). This is a temporary fix since
  17871. we can live with the minor issue in bug 14219 (it just results in
  17872. some load on the network) but the regression of 16381 is too much
  17873. of a setback. First-round fix for bug 16381; bugfix
  17874. on 0.2.6.3-alpha.
  17875. o Major bugfixes (hidden services):
  17876. - When cannibalizing a circuit for an introduction point, always
  17877. extend to the chosen exit node (creating a 4 hop circuit).
  17878. Previously Tor would use the current circuit exit node, which
  17879. changed the original choice of introduction point, and could cause
  17880. the hidden service to skip excluded introduction points or
  17881. reconnect to a skipped introduction point. Fixes bug 16260; bugfix
  17882. on 0.1.0.1-rc.
  17883. o Major bugfixes (open file limit):
  17884. - The open file limit wasn't checked before calling
  17885. tor_accept_socket_nonblocking(), which would make Tor exceed the
  17886. limit. Now, before opening a new socket, Tor validates the open
  17887. file limit just before, and if the max has been reached, return an
  17888. error. Fixes bug 16288; bugfix on 0.1.1.1-alpha.
  17889. o Major bugfixes (stability, also in 0.2.6.10):
  17890. - Stop crashing with an assertion failure when parsing certain kinds
  17891. of malformed or truncated microdescriptors. Fixes bug 16400;
  17892. bugfix on 0.2.6.1-alpha. Found by "torkeln"; fix based on a patch
  17893. by "cypherpunks_backup".
  17894. - Stop random client-side assertion failures that could occur when
  17895. connecting to a busy hidden service, or connecting to a hidden
  17896. service while a NEWNYM is in progress. Fixes bug 16013; bugfix
  17897. on 0.1.0.1-rc.
  17898. o Minor features (directory authorities, security, also in 0.2.6.9):
  17899. - The HSDir flag given by authorities now requires the Stable flag.
  17900. For the current network, this results in going from 2887 to 2806
  17901. HSDirs. Also, it makes it harder for an attacker to launch a sybil
  17902. attack by raising the effort for a relay to become Stable to
  17903. require at the very least 7 days, while maintaining the 96 hours
  17904. uptime requirement for HSDir. Implements ticket 8243.
  17905. o Minor features (client):
  17906. - Relax the validation of hostnames in SOCKS5 requests, allowing the
  17907. character '_' to appear, in order to cope with domains observed in
  17908. the wild that are serving non-RFC compliant records. Resolves
  17909. ticket 16430.
  17910. - Relax the validation done to hostnames in SOCKS5 requests, and
  17911. allow a single trailing '.' to cope with clients that pass FQDNs
  17912. using that syntax to explicitly indicate that the domain name is
  17913. fully-qualified. Fixes bug 16674; bugfix on 0.2.6.2-alpha.
  17914. - Add GroupWritable and WorldWritable options to unix-socket based
  17915. SocksPort and ControlPort options. These options apply to a single
  17916. socket, and override {Control,Socks}SocketsGroupWritable. Closes
  17917. ticket 15220.
  17918. o Minor features (control protocol):
  17919. - Support network-liveness GETINFO key and NETWORK_LIVENESS event in
  17920. the control protocol. Resolves ticket 15358.
  17921. o Minor features (directory authorities):
  17922. - Directory authorities no longer vote against the "Fast", "Stable",
  17923. and "HSDir" flags just because they were going to vote against
  17924. "Running": if the consensus turns out to be that the router was
  17925. running, then the authority's vote should count. Patch from Peter
  17926. Retzlaff; closes issue 8712.
  17927. o Minor features (geoip, also in 0.2.6.10):
  17928. - Update geoip to the June 3 2015 Maxmind GeoLite2 Country database.
  17929. - Update geoip6 to the June 3 2015 Maxmind GeoLite2 Country database.
  17930. o Minor features (hidden services):
  17931. - Add the new options "HiddenServiceMaxStreams" and
  17932. "HiddenServiceMaxStreamsCloseCircuit" to allow hidden services to
  17933. limit the maximum number of simultaneous streams per circuit, and
  17934. optionally tear down the circuit when the limit is exceeded. Part
  17935. of ticket 16052.
  17936. o Minor features (portability):
  17937. - Use C99 variadic macros when the compiler is not GCC. This avoids
  17938. failing compilations on MSVC, and fixes a log-file-based race
  17939. condition in our old workarounds. Original patch from Gisle Vanem.
  17940. o Minor bugfixes (compilation, also in 0.2.6.9):
  17941. - Build with --enable-systemd correctly when libsystemd is
  17942. installed, but systemd is not. Fixes bug 16164; bugfix on
  17943. 0.2.6.3-alpha. Patch from Peter Palfrader.
  17944. o Minor bugfixes (controller):
  17945. - Add the descriptor ID in each HS_DESC control event. It was
  17946. missing, but specified in control-spec.txt. Fixes bug 15881;
  17947. bugfix on 0.2.5.2-alpha.
  17948. o Minor bugfixes (crypto error-handling, also in 0.2.6.10):
  17949. - Check for failures from crypto_early_init, and refuse to continue.
  17950. A previous typo meant that we could keep going with an
  17951. uninitialized crypto library, and would have OpenSSL initialize
  17952. its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
  17953. when implementing ticket 4900. Patch by "teor".
  17954. o Minor bugfixes (hidden services):
  17955. - Fix a crash when reloading configuration while at least one
  17956. configured and one ephemeral hidden service exists. Fixes bug
  17957. 16060; bugfix on 0.2.7.1-alpha.
  17958. - Avoid crashing with a double-free bug when we create an ephemeral
  17959. hidden service but adding it fails for some reason. Fixes bug
  17960. 16228; bugfix on 0.2.7.1-alpha.
  17961. o Minor bugfixes (Linux seccomp2 sandbox):
  17962. - Use the sandbox in tor_open_cloexec whether or not O_CLOEXEC is
  17963. defined. Patch by "teor". Fixes bug 16515; bugfix on 0.2.3.1-alpha.
  17964. o Minor bugfixes (Linux seccomp2 sandbox, also in 0.2.6.10):
  17965. - Allow pipe() and pipe2() syscalls in the seccomp2 sandbox: we need
  17966. these when eventfd2() support is missing. Fixes bug 16363; bugfix
  17967. on 0.2.6.3-alpha. Patch from "teor".
  17968. o Minor bugfixes (Linux seccomp2 sandbox, also in 0.2.6.9):
  17969. - Fix sandboxing to work when running as a relay, by allowing the
  17970. renaming of secret_id_key, and allowing the eventfd2 and futex
  17971. syscalls. Fixes bug 16244; bugfix on 0.2.6.1-alpha. Patch by
  17972. Peter Palfrader.
  17973. - Allow systemd connections to work with the Linux seccomp2 sandbox
  17974. code. Fixes bug 16212; bugfix on 0.2.6.2-alpha. Patch by
  17975. Peter Palfrader.
  17976. o Minor bugfixes (relay):
  17977. - Fix a rarely-encountered memory leak when failing to initialize
  17978. the thread pool. Fixes bug 16631; bugfix on 0.2.6.3-alpha. Patch
  17979. from "cypherpunks".
  17980. o Minor bugfixes (systemd):
  17981. - Fix an accidental formatting error that broke the systemd
  17982. configuration file. Fixes bug 16152; bugfix on 0.2.7.1-alpha.
  17983. - Tor's systemd unit file no longer contains extraneous spaces.
  17984. These spaces would sometimes confuse tools like deb-systemd-
  17985. helper. Fixes bug 16162; bugfix on 0.2.5.5-alpha.
  17986. o Minor bugfixes (tests):
  17987. - Use the configured Python executable when running test-stem-full.
  17988. Fixes bug 16470; bugfix on 0.2.7.1-alpha.
  17989. o Minor bugfixes (tests, also in 0.2.6.9):
  17990. - Fix a crash in the unit tests when built with MSVC2013. Fixes bug
  17991. 16030; bugfix on 0.2.6.2-alpha. Patch from "NewEraCracker".
  17992. o Minor bugfixes (threads, comments):
  17993. - Always initialize return value in compute_desc_id in rendcommon.c
  17994. Patch by "teor". Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
  17995. - Check for NULL values in getinfo_helper_onions(). Patch by "teor".
  17996. Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
  17997. - Remove undefined directive-in-macro in test_util_writepid clang
  17998. 3.7 complains that using a preprocessor directive inside a macro
  17999. invocation in test_util_writepid in test_util.c is undefined.
  18000. Patch by "teor". Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
  18001. o Code simplification and refactoring:
  18002. - Define WINVER and _WIN32_WINNT centrally, in orconfig.h, in order
  18003. to ensure they remain consistent and visible everywhere.
  18004. - Remove some vestigial workarounds for the MSVC6 compiler. We
  18005. haven't supported that in ages.
  18006. - The link authentication code has been refactored for better
  18007. testability and reliability. It now uses code generated with the
  18008. "trunnel" binary encoding generator, to reduce the risk of bugs
  18009. due to programmer error. Done as part of ticket 12498.
  18010. o Documentation:
  18011. - Include a specific and (hopefully) accurate documentation of the
  18012. torrc file's meta-format in doc/torrc_format.txt. This is mainly
  18013. of interest to people writing programs to parse or generate torrc
  18014. files. This document is not a commitment to long-term
  18015. compatibility; some aspects of the current format are a bit
  18016. ridiculous. Closes ticket 2325.
  18017. o Removed features:
  18018. - Tor no longer supports copies of OpenSSL that are missing support
  18019. for Elliptic Curve Cryptography. (We began using ECC when
  18020. available in 0.2.4.8-alpha, for more safe and efficient key
  18021. negotiation.) In particular, support for at least one of P256 or
  18022. P224 is now required, with manual configuration needed if only
  18023. P224 is available. Resolves ticket 16140.
  18024. - Tor no longer supports versions of OpenSSL before 1.0. (If you are
  18025. on an operating system that has not upgraded to OpenSSL 1.0 or
  18026. later, and you compile Tor from source, you will need to install a
  18027. more recent OpenSSL to link Tor against.) These versions of
  18028. OpenSSL are still supported by the OpenSSL, but the numerous
  18029. cryptographic improvements in later OpenSSL releases makes them a
  18030. clear choice. Resolves ticket 16034.
  18031. - Remove the HidServDirectoryV2 option. Now all relays offer to
  18032. store hidden service descriptors. Related to 16543.
  18033. - Remove the VoteOnHidServDirectoriesV2 option, since all
  18034. authorities have long set it to 1. Closes ticket 16543.
  18035. o Testing:
  18036. - Document use of coverity, clang static analyzer, and clang dynamic
  18037. undefined behavior and address sanitizers in doc/HACKING. Include
  18038. detailed usage instructions in the blacklist. Patch by "teor".
  18039. Closes ticket 15817.
  18040. - The link authentication protocol code now has extensive tests.
  18041. - The relay descriptor signature testing code now has
  18042. extensive tests.
  18043. - The test_workqueue program now runs faster, and is enabled by
  18044. default as a part of "make check".
  18045. - Now that OpenSSL has its own scrypt implementation, add an unit
  18046. test that checks for interoperability between libscrypt_scrypt()
  18047. and OpenSSL's EVP_PBE_scrypt() so that we could not use libscrypt
  18048. and rely on EVP_PBE_scrypt() whenever possible. Resolves
  18049. ticket 16189.
  18050. Changes in version 0.2.6.10 - 2015-07-12
  18051. Tor version 0.2.6.10 fixes some significant stability and hidden
  18052. service client bugs, bulletproofs the cryptography init process, and
  18053. fixes a bug when using the sandbox code with some older versions of
  18054. Linux. Everyone running an older version, especially an older version
  18055. of 0.2.6, should upgrade.
  18056. o Major bugfixes (hidden service clients, stability):
  18057. - Stop refusing to store updated hidden service descriptors on a
  18058. client. This reverts commit 9407040c59218 (which indeed fixed bug
  18059. 14219, but introduced a major hidden service reachability
  18060. regression detailed in bug 16381). This is a temporary fix since
  18061. we can live with the minor issue in bug 14219 (it just results in
  18062. some load on the network) but the regression of 16381 is too much
  18063. of a setback. First-round fix for bug 16381; bugfix
  18064. on 0.2.6.3-alpha.
  18065. o Major bugfixes (stability):
  18066. - Stop crashing with an assertion failure when parsing certain kinds
  18067. of malformed or truncated microdescriptors. Fixes bug 16400;
  18068. bugfix on 0.2.6.1-alpha. Found by "torkeln"; fix based on a patch
  18069. by "cypherpunks_backup".
  18070. - Stop random client-side assertion failures that could occur when
  18071. connecting to a busy hidden service, or connecting to a hidden
  18072. service while a NEWNYM is in progress. Fixes bug 16013; bugfix
  18073. on 0.1.0.1-rc.
  18074. o Minor features (geoip):
  18075. - Update geoip to the June 3 2015 Maxmind GeoLite2 Country database.
  18076. - Update geoip6 to the June 3 2015 Maxmind GeoLite2 Country database.
  18077. o Minor bugfixes (crypto error-handling):
  18078. - Check for failures from crypto_early_init, and refuse to continue.
  18079. A previous typo meant that we could keep going with an
  18080. uninitialized crypto library, and would have OpenSSL initialize
  18081. its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
  18082. when implementing ticket 4900. Patch by "teor".
  18083. o Minor bugfixes (Linux seccomp2 sandbox):
  18084. - Allow pipe() and pipe2() syscalls in the seccomp2 sandbox: we need
  18085. these when eventfd2() support is missing. Fixes bug 16363; bugfix
  18086. on 0.2.6.3-alpha. Patch from "teor".
  18087. Changes in version 0.2.6.9 - 2015-06-11
  18088. Tor 0.2.6.9 fixes a regression in the circuit isolation code, increases the
  18089. requirements for receiving an HSDir flag, and addresses some other small
  18090. bugs in the systemd and sandbox code. Clients using circuit isolation
  18091. should upgrade; all directory authorities should upgrade.
  18092. o Major bugfixes (client-side privacy):
  18093. - Properly separate out each SOCKSPort when applying stream
  18094. isolation. The error occurred because each port's session group was
  18095. being overwritten by a default value when the listener connection
  18096. was initialized. Fixes bug 16247; bugfix on 0.2.6.3-alpha. Patch
  18097. by "jojelino".
  18098. o Minor feature (directory authorities, security):
  18099. - The HSDir flag given by authorities now requires the Stable flag.
  18100. For the current network, this results in going from 2887 to 2806
  18101. HSDirs. Also, it makes it harder for an attacker to launch a sybil
  18102. attack by raising the effort for a relay to become Stable which
  18103. takes at the very least 7 days to do so and by keeping the 96
  18104. hours uptime requirement for HSDir. Implements ticket 8243.
  18105. o Minor bugfixes (compilation):
  18106. - Build with --enable-systemd correctly when libsystemd is
  18107. installed, but systemd is not. Fixes bug 16164; bugfix on
  18108. 0.2.6.3-alpha. Patch from Peter Palfrader.
  18109. o Minor bugfixes (Linux seccomp2 sandbox):
  18110. - Fix sandboxing to work when running as a relaymby renaming of
  18111. secret_id_key, and allowing the eventfd2 and futex syscalls. Fixes
  18112. bug 16244; bugfix on 0.2.6.1-alpha. Patch by Peter Palfrader.
  18113. - Allow systemd connections to work with the Linux seccomp2 sandbox
  18114. code. Fixes bug 16212; bugfix on 0.2.6.2-alpha. Patch by
  18115. Peter Palfrader.
  18116. o Minor bugfixes (tests):
  18117. - Fix a crash in the unit tests when built with MSVC2013. Fixes bug
  18118. 16030; bugfix on 0.2.6.2-alpha. Patch from "NewEraCracker".
  18119. Changes in version 0.2.6.8 - 2015-05-21
  18120. Tor 0.2.6.8 fixes a bit of dodgy code in parsing INTRODUCE2 cells, and
  18121. fixes an authority-side bug in assigning the HSDir flag. All directory
  18122. authorities should upgrade.
  18123. o Major bugfixes (hidden services, backport from 0.2.7.1-alpha):
  18124. - Revert commit that made directory authorities assign the HSDir
  18125. flag to relays without a DirPort; this was bad because such relays
  18126. can't handle BEGIN_DIR cells. Fixes bug 15850; bugfix
  18127. on 0.2.6.3-alpha.
  18128. o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
  18129. - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
  18130. a client authorized hidden service. Fixes bug 15823; bugfix
  18131. on 0.2.1.6-alpha.
  18132. o Minor features (geoip):
  18133. - Update geoip to the April 8 2015 Maxmind GeoLite2 Country database.
  18134. - Update geoip6 to the April 8 2015 Maxmind GeoLite2
  18135. Country database.
  18136. Changes in version 0.2.7.1-alpha - 2015-05-12
  18137. Tor 0.2.7.1-alpha is the first alpha release in its series. It
  18138. includes numerous small features and bugfixes against previous Tor
  18139. versions, and numerous small infrastructure improvements. The most
  18140. notable features are several new ways for controllers to interact with
  18141. the hidden services subsystem.
  18142. o New system requirements:
  18143. - Tor no longer includes workarounds to support Libevent versions
  18144. before 1.3e. Libevent 2.0 or later is recommended. Closes
  18145. ticket 15248.
  18146. o Major features (controller):
  18147. - Add the ADD_ONION and DEL_ONION commands that allow the creation
  18148. and management of hidden services via the controller. Closes
  18149. ticket 6411.
  18150. - New "GETINFO onions/current" and "GETINFO onions/detached"
  18151. commands to get information about hidden services created via the
  18152. controller. Part of ticket 6411.
  18153. - New HSFETCH command to launch a request for a hidden service
  18154. descriptor. Closes ticket 14847.
  18155. - New HSPOST command to upload a hidden service descriptor. Closes
  18156. ticket 3523. Patch by "DonnchaC".
  18157. o Major bugfixes (hidden services):
  18158. - Revert commit that made directory authorities assign the HSDir
  18159. flag to relays without a DirPort; this was bad because such relays
  18160. can't handle BEGIN_DIR cells. Fixes bug 15850; bugfix
  18161. on 0.2.6.3-alpha.
  18162. o Minor features (clock-jump tolerance):
  18163. - Recover better when our clock jumps back many hours, like might
  18164. happen for Tails or Whonix users who start with a very wrong
  18165. hardware clock, use Tor to discover a more accurate time, and then
  18166. fix their clock. Resolves part of ticket 8766.
  18167. o Minor features (command-line interface):
  18168. - Make --hash-password imply --hush to prevent unnecessary noise.
  18169. Closes ticket 15542. Patch from "cypherpunks".
  18170. - Print a warning whenever we find a relative file path being used
  18171. as torrc option. Resolves issue 14018.
  18172. o Minor features (controller):
  18173. - Add DirAuthority lines for default directory authorities to the
  18174. output of the "GETINFO config/defaults" command if not already
  18175. present. Implements ticket 14840.
  18176. - Controllers can now use "GETINFO hs/client/desc/id/..." to
  18177. retrieve items from the client's hidden service descriptor cache.
  18178. Closes ticket 14845.
  18179. - Implement a new controller command "GETINFO status/fresh-relay-
  18180. descs" to fetch a descriptor/extrainfo pair that was generated on
  18181. demand just for the controller's use. Implements ticket 14784.
  18182. o Minor features (DoS-resistance):
  18183. - Make it harder for attackers to overload hidden services with
  18184. introductions, by blocking multiple introduction requests on the
  18185. same circuit. Resolves ticket 15515.
  18186. o Minor features (geoip):
  18187. - Update geoip to the April 8 2015 Maxmind GeoLite2 Country database.
  18188. - Update geoip6 to the April 8 2015 Maxmind GeoLite2
  18189. Country database.
  18190. o Minor features (HS popularity countermeasure):
  18191. - To avoid leaking HS popularity, don't cycle the introduction point
  18192. when we've handled a fixed number of INTRODUCE2 cells but instead
  18193. cycle it when a random number of introductions is reached, thus
  18194. making it more difficult for an attacker to find out the amount of
  18195. clients that have used the introduction point for a specific HS.
  18196. Closes ticket 15745.
  18197. o Minor features (logging):
  18198. - Include the Tor version in all LD_BUG log messages, since people
  18199. tend to cut and paste those into the bugtracker. Implements
  18200. ticket 15026.
  18201. o Minor features (pluggable transports):
  18202. - When launching managed pluggable transports on Linux systems,
  18203. attempt to have the kernel deliver a SIGTERM on tor exit if the
  18204. pluggable transport process is still running. Resolves
  18205. ticket 15471.
  18206. - When launching managed pluggable transports, setup a valid open
  18207. stdin in the child process that can be used to detect if tor has
  18208. terminated. The "TOR_PT_EXIT_ON_STDIN_CLOSE" environment variable
  18209. can be used by implementations to detect this new behavior.
  18210. Resolves ticket 15435.
  18211. o Minor features (testing):
  18212. - Add a test to verify that the compiler does not eliminate our
  18213. memwipe() implementation. Closes ticket 15377.
  18214. - Add make rule `check-changes` to verify the format of changes
  18215. files. Closes ticket 15180.
  18216. - Add unit tests for control_event_is_interesting(). Add a compile-
  18217. time check that the number of events doesn't exceed the capacity
  18218. of control_event_t.event_mask. Closes ticket 15431, checks for
  18219. bugs similar to 13085. Patch by "teor".
  18220. - Command-line argument tests moved to Stem. Resolves ticket 14806.
  18221. - Integrate the ntor, backtrace, and zero-length keys tests into the
  18222. automake test suite. Closes ticket 15344.
  18223. - Remove assertions during builds to determine Tor's test coverage.
  18224. We don't want to trigger these even in assertions, so including
  18225. them artificially makes our branch coverage look worse than it is.
  18226. This patch provides the new test-stem-full and coverage-html-full
  18227. configure options. Implements ticket 15400.
  18228. o Minor bugfixes (build):
  18229. - Improve out-of-tree builds by making non-standard rules work and
  18230. clean up additional files and directories. Fixes bug 15053; bugfix
  18231. on 0.2.7.0-alpha.
  18232. o Minor bugfixes (command-line interface):
  18233. - When "--quiet" is provided along with "--validate-config", do not
  18234. write anything to stdout on success. Fixes bug 14994; bugfix
  18235. on 0.2.3.3-alpha.
  18236. - When complaining about bad arguments to "--dump-config", use
  18237. stderr, not stdout.
  18238. o Minor bugfixes (configuration, unit tests):
  18239. - Only add the default fallback directories when the DirAuthorities,
  18240. AlternateDirAuthority, and FallbackDir directory config options
  18241. are set to their defaults. The default fallback directory list is
  18242. currently empty, this fix will only change tor's behavior when it
  18243. has default fallback directories. Includes unit tests for
  18244. consider_adding_dir_servers(). Fixes bug 15642; bugfix on
  18245. 90f6071d8dc0 in 0.2.4.7-alpha. Patch by "teor".
  18246. o Minor bugfixes (correctness):
  18247. - For correctness, avoid modifying a constant string in
  18248. handle_control_postdescriptor. Fixes bug 15546; bugfix
  18249. on 0.1.1.16-rc.
  18250. - Remove side-effects from tor_assert() calls. This was harmless,
  18251. because we never disable assertions, but it is bad style and
  18252. unnecessary. Fixes bug 15211; bugfix on 0.2.5.5, 0.2.2.36,
  18253. and 0.2.0.10.
  18254. o Minor bugfixes (hidden service):
  18255. - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
  18256. a client authorized hidden service. Fixes bug 15823; bugfix
  18257. on 0.2.1.6-alpha.
  18258. - Remove an extraneous newline character from the end of hidden
  18259. service descriptors. Fixes bug 15296; bugfix on 0.2.0.10-alpha.
  18260. o Minor bugfixes (interface):
  18261. - Print usage information for --dump-config when it is used without
  18262. an argument. Also, fix the error message to use different wording
  18263. and add newline at the end. Fixes bug 15541; bugfix
  18264. on 0.2.5.1-alpha.
  18265. o Minor bugfixes (logs):
  18266. - When building Tor under Clang, do not include an extra set of
  18267. parentheses in log messages that include function names. Fixes bug
  18268. 15269; bugfix on every released version of Tor when compiled with
  18269. recent enough Clang.
  18270. o Minor bugfixes (network):
  18271. - When attempting to use fallback technique for network interface
  18272. lookup, disregard loopback and multicast addresses since they are
  18273. unsuitable for public communications.
  18274. o Minor bugfixes (statistics):
  18275. - Disregard the ConnDirectionStatistics torrc options when Tor is
  18276. not a relay since in that mode of operation no sensible data is
  18277. being collected and because Tor might run into measurement hiccups
  18278. when running as a client for some time, then becoming a relay.
  18279. Fixes bug 15604; bugfix on 0.2.2.35.
  18280. o Minor bugfixes (test networks):
  18281. - When self-testing reachability, use ExtendAllowPrivateAddresses to
  18282. determine if local/private addresses imply reachability. The
  18283. previous fix used TestingTorNetwork, which implies
  18284. ExtendAllowPrivateAddresses, but this excluded rare configurations
  18285. where ExtendAllowPrivateAddresses is set but TestingTorNetwork is
  18286. not. Fixes bug 15771; bugfix on 0.2.6.1-alpha. Patch by "teor",
  18287. issue discovered by CJ Ess.
  18288. o Minor bugfixes (testing):
  18289. - Check for matching value in server response in ntor_ref.py. Fixes
  18290. bug 15591; bugfix on 0.2.4.8-alpha. Reported and fixed
  18291. by "joelanders".
  18292. - Set the severity correctly when testing
  18293. get_interface_addresses_ifaddrs() and
  18294. get_interface_addresses_win32(), so that the tests fail gracefully
  18295. instead of triggering an assertion. Fixes bug 15759; bugfix on
  18296. 0.2.6.3-alpha. Reported by Nicolas Derive.
  18297. o Code simplification and refactoring:
  18298. - Move the hacky fallback code out of get_interface_address6() into
  18299. separate function and get it covered with unit-tests. Resolves
  18300. ticket 14710.
  18301. - Refactor hidden service client-side cache lookup to intelligently
  18302. report its various failure cases, and disentangle failure cases
  18303. involving a lack of introduction points. Closes ticket 14391.
  18304. - Use our own Base64 encoder instead of OpenSSL's, to allow more
  18305. control over the output. Part of ticket 15652.
  18306. o Documentation:
  18307. - Improve the descriptions of statistics-related torrc options in
  18308. the manpage to describe rationale and possible uses cases. Fixes
  18309. issue 15550.
  18310. - Improve the layout and formatting of ./configure --help messages.
  18311. Closes ticket 15024. Patch from "cypherpunks".
  18312. - Standardize on the term "server descriptor" in the manual page.
  18313. Previously, we had used "router descriptor", "server descriptor",
  18314. and "relay descriptor" interchangeably. Part of ticket 14987.
  18315. o Removed code:
  18316. - Remove `USE_OPENSSL_BASE64` and the corresponding fallback code
  18317. and always use the internal Base64 decoder. The internal decoder
  18318. has been part of tor since 0.2.0.10-alpha, and no one should
  18319. be using the OpenSSL one. Part of ticket 15652.
  18320. - Remove the 'tor_strclear()' function; use memwipe() instead.
  18321. Closes ticket 14922.
  18322. o Removed features:
  18323. - Remove the (seldom-used) DynamicDHGroups feature. For anti-
  18324. fingerprinting we now recommend pluggable transports; for forward-
  18325. secrecy in TLS, we now use the P-256 group. Closes ticket 13736.
  18326. - Remove the undocumented "--digests" command-line option. It
  18327. complicated our build process, caused subtle build issues on
  18328. multiple platforms, and is now redundant since we started
  18329. including git version identifiers. Closes ticket 14742.
  18330. - Tor no longer contains checks for ancient directory cache versions
  18331. that didn't know about microdescriptors.
  18332. - Tor no longer contains workarounds for stat files generated by
  18333. super-old versions of Tor that didn't choose guards sensibly.
  18334. Changes in version 0.2.4.27 - 2015-04-06
  18335. Tor 0.2.4.27 backports two fixes from 0.2.6.7 for security issues that
  18336. could be used by an attacker to crash hidden services, or crash clients
  18337. visiting hidden services. Hidden services should upgrade as soon as
  18338. possible; clients should upgrade whenever packages become available.
  18339. This release also backports a simple improvement to make hidden
  18340. services a bit less vulnerable to denial-of-service attacks.
  18341. o Major bugfixes (security, hidden service):
  18342. - Fix an issue that would allow a malicious client to trigger an
  18343. assertion failure and halt a hidden service. Fixes bug 15600;
  18344. bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
  18345. - Fix a bug that could cause a client to crash with an assertion
  18346. failure when parsing a malformed hidden service descriptor. Fixes
  18347. bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
  18348. o Minor features (DoS-resistance, hidden service):
  18349. - Introduction points no longer allow multiple INTRODUCE1 cells to
  18350. arrive on the same circuit. This should make it more expensive for
  18351. attackers to overwhelm hidden services with introductions.
  18352. Resolves ticket 15515.
  18353. Changes in version 0.2.5.12 - 2015-04-06
  18354. Tor 0.2.5.12 backports two fixes from 0.2.6.7 for security issues that
  18355. could be used by an attacker to crash hidden services, or crash clients
  18356. visiting hidden services. Hidden services should upgrade as soon as
  18357. possible; clients should upgrade whenever packages become available.
  18358. This release also backports a simple improvement to make hidden
  18359. services a bit less vulnerable to denial-of-service attacks.
  18360. o Major bugfixes (security, hidden service):
  18361. - Fix an issue that would allow a malicious client to trigger an
  18362. assertion failure and halt a hidden service. Fixes bug 15600;
  18363. bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
  18364. - Fix a bug that could cause a client to crash with an assertion
  18365. failure when parsing a malformed hidden service descriptor. Fixes
  18366. bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
  18367. o Minor features (DoS-resistance, hidden service):
  18368. - Introduction points no longer allow multiple INTRODUCE1 cells to
  18369. arrive on the same circuit. This should make it more expensive for
  18370. attackers to overwhelm hidden services with introductions.
  18371. Resolves ticket 15515.
  18372. Changes in version 0.2.6.7 - 2015-04-06
  18373. Tor 0.2.6.7 fixes two security issues that could be used by an
  18374. attacker to crash hidden services, or crash clients visiting hidden
  18375. services. Hidden services should upgrade as soon as possible; clients
  18376. should upgrade whenever packages become available.
  18377. This release also contains two simple improvements to make hidden
  18378. services a bit less vulnerable to denial-of-service attacks.
  18379. o Major bugfixes (security, hidden service):
  18380. - Fix an issue that would allow a malicious client to trigger an
  18381. assertion failure and halt a hidden service. Fixes bug 15600;
  18382. bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
  18383. - Fix a bug that could cause a client to crash with an assertion
  18384. failure when parsing a malformed hidden service descriptor. Fixes
  18385. bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
  18386. o Minor features (DoS-resistance, hidden service):
  18387. - Introduction points no longer allow multiple INTRODUCE1 cells to
  18388. arrive on the same circuit. This should make it more expensive for
  18389. attackers to overwhelm hidden services with introductions.
  18390. Resolves ticket 15515.
  18391. - Decrease the amount of reattempts that a hidden service performs
  18392. when its rendezvous circuits fail. This reduces the computational
  18393. cost for running a hidden service under heavy load. Resolves
  18394. ticket 11447.
  18395. Changes in version 0.2.6.6 - 2015-03-24
  18396. Tor 0.2.6.6 is the first stable release in the 0.2.6 series.
  18397. It adds numerous safety, security, correctness, and performance
  18398. improvements. Client programs can be configured to use more kinds of
  18399. sockets, AutomapHosts works better, the multithreading backend is
  18400. improved, cell transmission is refactored, test coverage is much
  18401. higher, more denial-of-service attacks are handled, guard selection is
  18402. improved to handle long-term guards better, pluggable transports
  18403. should work a bit better, and some annoying hidden service performance
  18404. bugs should be addressed.
  18405. o Minor bugfixes (portability):
  18406. - Use the correct datatype in the SipHash-2-4 function to prevent
  18407. compilers from assuming any sort of alignment. Fixes bug 15436;
  18408. bugfix on 0.2.5.3-alpha.
  18409. Changes in version 0.2.6.5-rc - 2015-03-18
  18410. Tor 0.2.6.5-rc is the second and (hopefully) last release candidate in
  18411. the 0.2.6. It fixes a small number of bugs found in 0.2.6.4-rc.
  18412. o Major bugfixes (client):
  18413. - Avoid crashing when making certain configuration option changes on
  18414. clients. Fixes bug 15245; bugfix on 0.2.6.3-alpha. Reported
  18415. by "anonym".
  18416. o Major bugfixes (pluggable transports):
  18417. - Initialize the extended OR Port authentication cookie before
  18418. launching pluggable transports. This prevents a race condition
  18419. that occurred when server-side pluggable transports would cache the
  18420. authentication cookie before it has been (re)generated. Fixes bug
  18421. 15240; bugfix on 0.2.5.1-alpha.
  18422. o Major bugfixes (portability):
  18423. - Do not crash on startup when running on Solaris. Fixes a bug
  18424. related to our fix for 9495; bugfix on 0.2.6.1-alpha. Reported
  18425. by "ruebezahl".
  18426. o Minor features (heartbeat):
  18427. - On relays, report how many connections we negotiated using each
  18428. version of the Tor link protocols. This information will let us
  18429. know if removing support for very old versions of the Tor
  18430. protocols is harming the network. Closes ticket 15212.
  18431. o Code simplification and refactoring:
  18432. - Refactor main loop to extract the 'loop' part. This makes it
  18433. easier to run Tor under Shadow. Closes ticket 15176.
  18434. Changes in version 0.2.5.11 - 2015-03-17
  18435. Tor 0.2.5.11 is the second stable release in the 0.2.5 series.
  18436. It backports several bugfixes from the 0.2.6 branch, including a
  18437. couple of medium-level security fixes for relays and exit nodes.
  18438. It also updates the list of directory authorities.
  18439. o Directory authority changes:
  18440. - Remove turtles as a directory authority.
  18441. - Add longclaw as a new (v3) directory authority. This implements
  18442. ticket 13296. This keeps the directory authority count at 9.
  18443. - The directory authority Faravahar has a new IP address. This
  18444. closes ticket 14487.
  18445. o Major bugfixes (crash, OSX, security):
  18446. - Fix a remote denial-of-service opportunity caused by a bug in
  18447. OSX's _strlcat_chk() function. Fixes bug 15205; bug first appeared
  18448. in OSX 10.9.
  18449. o Major bugfixes (relay, stability, possible security):
  18450. - Fix a bug that could lead to a relay crashing with an assertion
  18451. failure if a buffer of exactly the wrong layout was passed to
  18452. buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
  18453. 0.2.0.10-alpha. Patch from 'cypherpunks'.
  18454. - Do not assert if the 'data' pointer on a buffer is advanced to the
  18455. very end of the buffer; log a BUG message instead. Only assert if
  18456. it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
  18457. o Major bugfixes (exit node stability):
  18458. - Fix an assertion failure that could occur under high DNS load.
  18459. Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
  18460. diagnosed and fixed by "cypherpunks".
  18461. o Major bugfixes (Linux seccomp2 sandbox):
  18462. - Upon receiving sighup with the seccomp2 sandbox enabled, do not
  18463. crash during attempts to call wait4. Fixes bug 15088; bugfix on
  18464. 0.2.5.1-alpha. Patch from "sanic".
  18465. o Minor features (controller):
  18466. - New "GETINFO bw-event-cache" to get information about recent
  18467. bandwidth events. Closes ticket 14128. Useful for controllers to
  18468. get recent bandwidth history after the fix for ticket 13988.
  18469. o Minor features (geoip):
  18470. - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
  18471. - Update geoip6 to the March 3 2015 Maxmind GeoLite2
  18472. Country database.
  18473. o Minor bugfixes (client, automapping):
  18474. - Avoid crashing on torrc lines for VirtualAddrNetworkIPv[4|6] when
  18475. no value follows the option. Fixes bug 14142; bugfix on
  18476. 0.2.4.7-alpha. Patch by "teor".
  18477. - Fix a memory leak when using AutomapHostsOnResolve. Fixes bug
  18478. 14195; bugfix on 0.1.0.1-rc.
  18479. o Minor bugfixes (compilation):
  18480. - Build without warnings with the stock OpenSSL srtp.h header, which
  18481. has a duplicate declaration of SSL_get_selected_srtp_profile().
  18482. Fixes bug 14220; this is OpenSSL's bug, not ours.
  18483. o Minor bugfixes (directory authority):
  18484. - Allow directory authorities to fetch more data from one another if
  18485. they find themselves missing lots of votes. Previously, they had
  18486. been bumping against the 10 MB queued data limit. Fixes bug 14261;
  18487. bugfix on 0.1.2.5-alpha.
  18488. - Enlarge the buffer to read bwauth generated files to avoid an
  18489. issue when parsing the file in dirserv_read_measured_bandwidths().
  18490. Fixes bug 14125; bugfix on 0.2.2.1-alpha.
  18491. o Minor bugfixes (statistics):
  18492. - Increase period over which bandwidth observations are aggregated
  18493. from 15 minutes to 4 hours. Fixes bug 13988; bugfix on 0.0.8pre1.
  18494. o Minor bugfixes (preventative security, C safety):
  18495. - When reading a hexadecimal, base-32, or base-64 encoded value from
  18496. a string, always overwrite the whole output buffer. This prevents
  18497. some bugs where we would look at (but fortunately, not reveal)
  18498. uninitialized memory on the stack. Fixes bug 14013; bugfix on all
  18499. versions of Tor.
  18500. Changes in version 0.2.4.26 - 2015-03-17
  18501. Tor 0.2.4.26 includes an updated list of directory authorities. It
  18502. also backports a couple of stability and security bugfixes from 0.2.5
  18503. and beyond.
  18504. o Directory authority changes:
  18505. - Remove turtles as a directory authority.
  18506. - Add longclaw as a new (v3) directory authority. This implements
  18507. ticket 13296. This keeps the directory authority count at 9.
  18508. - The directory authority Faravahar has a new IP address. This
  18509. closes ticket 14487.
  18510. o Major bugfixes (exit node stability, also in 0.2.6.3-alpha):
  18511. - Fix an assertion failure that could occur under high DNS load.
  18512. Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
  18513. diagnosed and fixed by "cypherpunks".
  18514. o Major bugfixes (relay, stability, possible security, also in 0.2.6.4-rc):
  18515. - Fix a bug that could lead to a relay crashing with an assertion
  18516. failure if a buffer of exactly the wrong layout was passed to
  18517. buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
  18518. 0.2.0.10-alpha. Patch from 'cypherpunks'.
  18519. - Do not assert if the 'data' pointer on a buffer is advanced to the
  18520. very end of the buffer; log a BUG message instead. Only assert if
  18521. it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
  18522. o Minor features (geoip):
  18523. - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
  18524. - Update geoip6 to the March 3 2015 Maxmind GeoLite2
  18525. Country database.
  18526. Changes in version 0.2.6.4-rc - 2015-03-09
  18527. Tor 0.2.6.4-alpha fixes an issue in the directory code that an
  18528. attacker might be able to use in order to crash certain Tor
  18529. directories. It also resolves some minor issues left over from, or
  18530. introduced in, Tor 0.2.6.3-alpha or earlier.
  18531. o Major bugfixes (crash, OSX, security):
  18532. - Fix a remote denial-of-service opportunity caused by a bug in
  18533. OSX's _strlcat_chk() function. Fixes bug 15205; bug first appeared
  18534. in OSX 10.9.
  18535. o Major bugfixes (relay, stability, possible security):
  18536. - Fix a bug that could lead to a relay crashing with an assertion
  18537. failure if a buffer of exactly the wrong layout is passed to
  18538. buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
  18539. 0.2.0.10-alpha. Patch from "cypherpunks".
  18540. - Do not assert if the 'data' pointer on a buffer is advanced to the
  18541. very end of the buffer; log a BUG message instead. Only assert if
  18542. it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
  18543. o Major bugfixes (FreeBSD IPFW transparent proxy):
  18544. - Fix address detection with FreeBSD transparent proxies, when
  18545. "TransProxyType ipfw" is in use. Fixes bug 15064; bugfix
  18546. on 0.2.5.4-alpha.
  18547. o Major bugfixes (Linux seccomp2 sandbox):
  18548. - Pass IPPROTO_TCP rather than 0 to socket(), so that the Linux
  18549. seccomp2 sandbox doesn't fail. Fixes bug 14989; bugfix
  18550. on 0.2.6.3-alpha.
  18551. - Allow AF_UNIX hidden services to be used with the seccomp2
  18552. sandbox. Fixes bug 15003; bugfix on 0.2.6.3-alpha.
  18553. - Upon receiving sighup with the seccomp2 sandbox enabled, do not
  18554. crash during attempts to call wait4. Fixes bug 15088; bugfix on
  18555. 0.2.5.1-alpha. Patch from "sanic".
  18556. o Minor features (controller):
  18557. - Messages about problems in the bootstrap process now include
  18558. information about the server we were trying to connect to when we
  18559. noticed the problem. Closes ticket 15006.
  18560. o Minor features (geoip):
  18561. - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
  18562. - Update geoip6 to the March 3 2015 Maxmind GeoLite2
  18563. Country database.
  18564. o Minor features (logs):
  18565. - Quiet some log messages in the heartbeat and at startup. Closes
  18566. ticket 14950.
  18567. o Minor bugfixes (certificate handling):
  18568. - If an authority operator accidentally makes a signing certificate
  18569. with a future publication time, do not discard its real signing
  18570. certificates. Fixes bug 11457; bugfix on 0.2.0.3-alpha.
  18571. - Remove any old authority certificates that have been superseded
  18572. for at least two days. Previously, we would keep superseded
  18573. certificates until they expired, if they were published close in
  18574. time to the certificate that superseded them. Fixes bug 11454;
  18575. bugfix on 0.2.1.8-alpha.
  18576. o Minor bugfixes (compilation):
  18577. - Fix a compilation warning on s390. Fixes bug 14988; bugfix
  18578. on 0.2.5.2-alpha.
  18579. - Fix a compilation warning on FreeBSD. Fixes bug 15151; bugfix
  18580. on 0.2.6.2-alpha.
  18581. o Minor bugfixes (testing):
  18582. - Fix endianness issues in unit test for resolve_my_address() to
  18583. have it pass on big endian systems. Fixes bug 14980; bugfix on
  18584. Tor 0.2.6.3-alpha.
  18585. - Avoid a side-effect in a tor_assert() in the unit tests. Fixes bug
  18586. 15188; bugfix on 0.1.2.3-alpha. Patch from Tom van der Woerdt.
  18587. - When running the new 'make test-stem' target, use the configured
  18588. python binary. Fixes bug 15037; bugfix on 0.2.6.3-alpha. Patch
  18589. from "cypherpunks".
  18590. - When running the zero-length-keys tests, do not use the default
  18591. torrc file. Fixes bug 15033; bugfix on 0.2.6.3-alpha. Reported
  18592. by "reezer".
  18593. o Directory authority IP change:
  18594. - The directory authority Faravahar has a new IP address. This
  18595. closes ticket 14487.
  18596. o Removed code:
  18597. - Remove some lingering dead code that once supported mempools.
  18598. Mempools were disabled by default in 0.2.5, and removed entirely
  18599. in 0.2.6.3-alpha. Closes more of ticket 14848; patch
  18600. by "cypherpunks".
  18601. Changes in version 0.2.6.3-alpha - 2015-02-19
  18602. Tor 0.2.6.3-alpha is the third (and hopefully final) alpha release in
  18603. the 0.2.6.x series. It introduces support for more kinds of sockets,
  18604. makes it harder to accidentally run an exit, improves our
  18605. multithreading backend, incorporates several fixes for the
  18606. AutomapHostsOnResolve option, and fixes numerous other bugs besides.
  18607. If no major regressions or security holes are found in this version,
  18608. the next version will be a release candidate.
  18609. o Deprecated versions:
  18610. - Tor relays older than 0.2.4.18-rc are no longer allowed to
  18611. advertise themselves on the network. Closes ticket 13555.
  18612. o Major features (security, unix domain sockets):
  18613. - Allow SocksPort to be an AF_UNIX Unix Domain Socket. Now high risk
  18614. applications can reach Tor without having to create AF_INET or
  18615. AF_INET6 sockets, meaning they can completely disable their
  18616. ability to make non-Tor network connections. To create a socket of
  18617. this type, use "SocksPort unix:/path/to/socket". Implements
  18618. ticket 12585.
  18619. - Support mapping hidden service virtual ports to AF_UNIX sockets.
  18620. The syntax is "HiddenServicePort 80 unix:/path/to/socket".
  18621. Implements ticket 11485.
  18622. o Major features (changed defaults):
  18623. - Prevent relay operators from unintentionally running exits: When a
  18624. relay is configured as an exit node, we now warn the user unless
  18625. the "ExitRelay" option is set to 1. We warn even more loudly if
  18626. the relay is configured with the default exit policy, since this
  18627. can indicate accidental misconfiguration. Setting "ExitRelay 0"
  18628. stops Tor from running as an exit relay. Closes ticket 10067.
  18629. o Major features (directory system):
  18630. - When downloading server- or microdescriptors from a directory
  18631. server, we no longer launch multiple simultaneous requests to the
  18632. same server. This reduces load on the directory servers,
  18633. especially when directory guards are in use. Closes ticket 9969.
  18634. - When downloading server- or microdescriptors over a tunneled
  18635. connection, do not limit the length of our requests to what the
  18636. Squid proxy is willing to handle. Part of ticket 9969.
  18637. - Authorities can now vote on the correct digests and latest
  18638. versions for different software packages. This allows packages
  18639. that include Tor to use the Tor authority system as a way to get
  18640. notified of updates and their correct digests. Implements proposal
  18641. 227. Closes ticket 10395.
  18642. o Major features (guards):
  18643. - Introduce the Guardfraction feature to improves load balancing on
  18644. guard nodes. Specifically, it aims to reduce the traffic gap that
  18645. guard nodes experience when they first get the Guard flag. This is
  18646. a required step if we want to increase the guard lifetime to 9
  18647. months or greater. Closes ticket 9321.
  18648. o Major features (performance):
  18649. - Make the CPU worker implementation more efficient by avoiding the
  18650. kernel and lengthening pipelines. The original implementation used
  18651. sockets to transfer data from the main thread to the workers, and
  18652. didn't allow any thread to be assigned more than a single piece of
  18653. work at once. The new implementation avoids communications
  18654. overhead by making requests in shared memory, avoiding kernel IO
  18655. where possible, and keeping more requests in flight at once.
  18656. Implements ticket 9682.
  18657. o Major features (relay):
  18658. - Raise the minimum acceptable configured bandwidth rate for bridges
  18659. to 50 KiB/sec and for relays to 75 KiB/sec. (The old values were
  18660. 20 KiB/sec.) Closes ticket 13822.
  18661. o Major bugfixes (exit node stability):
  18662. - Fix an assertion failure that could occur under high DNS load.
  18663. Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
  18664. diagnosed and fixed by "cypherpunks".
  18665. o Major bugfixes (mixed relay-client operation):
  18666. - When running as a relay and client at the same time (not
  18667. recommended), if we decide not to use a new guard because we want
  18668. to retry older guards, only close the locally-originating circuits
  18669. passing through that guard. Previously we would close all the
  18670. circuits through that guard. Fixes bug 9819; bugfix on
  18671. 0.2.1.1-alpha. Reported by "skruffy".
  18672. o Minor features (build):
  18673. - New --disable-system-torrc compile-time option to prevent Tor from
  18674. looking for the system-wide torrc or torrc-defaults files.
  18675. Resolves ticket 13037.
  18676. o Minor features (controller):
  18677. - Include SOCKS_USERNAME and SOCKS_PASSWORD values in controller
  18678. events so controllers can observe circuit isolation inputs. Closes
  18679. ticket 8405.
  18680. - ControlPort now supports the unix:/path/to/socket syntax as an
  18681. alternative to the ControlSocket option, for consistency with
  18682. SocksPort and HiddenServicePort. Closes ticket 14451.
  18683. - New "GETINFO bw-event-cache" to get information about recent
  18684. bandwidth events. Closes ticket 14128. Useful for controllers to
  18685. get recent bandwidth history after the fix for ticket 13988.
  18686. o Minor features (Denial of service resistance):
  18687. - Count the total number of bytes used storing hidden service
  18688. descriptors against the value of MaxMemInQueues. If we're low on
  18689. memory, and more than 20% of our memory is used holding hidden
  18690. service descriptors, free them until no more than 10% of our
  18691. memory holds hidden service descriptors. Free the least recently
  18692. fetched descriptors first. Resolves ticket 13806.
  18693. - When we have recently been under memory pressure (over 3/4 of
  18694. MaxMemInQueues is allocated), then allocate smaller zlib objects
  18695. for small requests. Closes ticket 11791.
  18696. o Minor features (geoip):
  18697. - Update geoip and geoip6 files to the January 7 2015 Maxmind
  18698. GeoLite2 Country database.
  18699. o Minor features (guard nodes):
  18700. - Reduce the time delay before saving guard status to disk from 10
  18701. minutes to 30 seconds (or from one hour to 10 minutes if
  18702. AvoidDiskWrites is set). Closes ticket 12485.
  18703. o Minor features (hidden service):
  18704. - Make Sybil attacks against hidden services harder by changing the
  18705. minimum time required to get the HSDir flag from 25 hours up to 96
  18706. hours. Addresses ticket 14149.
  18707. - New option "HiddenServiceAllowUnknownPorts" to allow hidden
  18708. services to disable the anti-scanning feature introduced in
  18709. 0.2.6.2-alpha. With this option not set, a connection to an
  18710. unlisted port closes the circuit. With this option set, only a
  18711. RELAY_DONE cell is sent. Closes ticket 14084.
  18712. o Minor features (interface):
  18713. - Implement "-f -" command-line option to read torrc configuration
  18714. from standard input, if you don't want to store the torrc file in
  18715. the file system. Implements feature 13865.
  18716. o Minor features (logging):
  18717. - Add a count of unique clients to the bridge heartbeat message.
  18718. Resolves ticket 6852.
  18719. - Suppress "router info incompatible with extra info" message when
  18720. reading extrainfo documents from cache. (This message got loud
  18721. around when we closed bug 9812 in 0.2.6.2-alpha.) Closes
  18722. ticket 13762.
  18723. - Elevate hidden service authorized-client message from DEBUG to
  18724. INFO. Closes ticket 14015.
  18725. o Minor features (stability):
  18726. - Add assertions in our hash-table iteration code to check for
  18727. corrupted values that could cause infinite loops. Closes
  18728. ticket 11737.
  18729. o Minor features (systemd):
  18730. - Various improvements and modernizations in systemd hardening
  18731. support. Closes ticket 13805. Patch from Craig Andrews.
  18732. o Minor features (testing networks):
  18733. - Drop the minimum RendPostPeriod on a testing network to 5 seconds,
  18734. and the default on a testing network to 2 minutes. Drop the
  18735. MIN_REND_INITIAL_POST_DELAY on a testing network to 5 seconds, but
  18736. keep the default on a testing network at 30 seconds. This reduces
  18737. HS bootstrap time to around 25 seconds. Also, change the default
  18738. time in test-network.sh to match. Closes ticket 13401. Patch
  18739. by "teor".
  18740. - Create TestingDirAuthVoteHSDir to correspond to
  18741. TestingDirAuthVoteExit/Guard. Ensures that authorities vote the
  18742. HSDir flag for the listed relays regardless of uptime or ORPort
  18743. connectivity. Respects the value of VoteOnHidServDirectoriesV2.
  18744. Partial implementation for ticket 14067. Patch by "teor".
  18745. o Minor features (tor2web mode):
  18746. - Introduce the config option Tor2webRendezvousPoints, which allows
  18747. clients in Tor2webMode to select a specific Rendezvous Point to be
  18748. used in HS circuits. This might allow better performance for
  18749. Tor2Web nodes. Implements ticket 12844.
  18750. o Minor bugfixes (client DNS):
  18751. - Report the correct cached DNS expiration times on SOCKS port or in
  18752. DNS replies. Previously, we would report everything as "never
  18753. expires." Fixes bug 14193; bugfix on 0.2.3.17-beta.
  18754. - Avoid a small memory leak when we find a cached answer for a
  18755. reverse DNS lookup in a client-side DNS cache. (Remember, client-
  18756. side DNS caching is off by default, and is not recommended.) Fixes
  18757. bug 14259; bugfix on 0.2.0.1-alpha.
  18758. o Minor bugfixes (client, automapping):
  18759. - Avoid crashing on torrc lines for VirtualAddrNetworkIPv[4|6] when
  18760. no value follows the option. Fixes bug 14142; bugfix on
  18761. 0.2.4.7-alpha. Patch by "teor".
  18762. - Fix a memory leak when using AutomapHostsOnResolve. Fixes bug
  18763. 14195; bugfix on 0.1.0.1-rc.
  18764. - Prevent changes to other options from removing the wildcard value
  18765. "." from "AutomapHostsSuffixes". Fixes bug 12509; bugfix
  18766. on 0.2.0.1-alpha.
  18767. - Allow MapAddress and AutomapHostsOnResolve to work together when
  18768. an address is mapped into another address type (like .onion) that
  18769. must be automapped at resolve time. Fixes bug 7555; bugfix
  18770. on 0.2.0.1-alpha.
  18771. o Minor bugfixes (client, bridges):
  18772. - When we are using bridges and we had a network connectivity
  18773. problem, only retry connecting to our currently configured
  18774. bridges, not all bridges we know about and remember using. Fixes
  18775. bug 14216; bugfix on 0.2.2.17-alpha.
  18776. o Minor bugfixes (client, IPv6):
  18777. - Reject socks requests to literal IPv6 addresses when IPv6Traffic
  18778. flag is not set; and not because the NoIPv4Traffic flag was set.
  18779. Previously we'd looked at the NoIPv4Traffic flag for both types of
  18780. literal addresses. Fixes bug 14280; bugfix on 0.2.4.7-alpha.
  18781. o Minor bugfixes (compilation):
  18782. - The address of an array in the middle of a structure will always
  18783. be non-NULL. clang recognises this and complains. Disable the
  18784. tautologous and redundant check to silence this warning. Fixes bug
  18785. 14001; bugfix on 0.2.1.2-alpha.
  18786. - Avoid warnings when building with systemd 209 or later. Fixes bug
  18787. 14072; bugfix on 0.2.6.2-alpha. Patch from "h.venev".
  18788. - Compile correctly with (unreleased) OpenSSL 1.1.0 headers.
  18789. Addresses ticket 14188.
  18790. - Build without warnings with the stock OpenSSL srtp.h header, which
  18791. has a duplicate declaration of SSL_get_selected_srtp_profile().
  18792. Fixes bug 14220; this is OpenSSL's bug, not ours.
  18793. - Do not compile any code related to Tor2Web mode when Tor2Web mode
  18794. is not enabled at compile time. Previously, this code was included
  18795. in a disabled state. See discussion on ticket 12844.
  18796. - Remove the --disable-threads configure option again. It was
  18797. accidentally partially reintroduced in 29ac883606d6d. Fixes bug
  18798. 14819; bugfix on 0.2.6.2-alpha.
  18799. o Minor bugfixes (controller):
  18800. - Report "down" in response to the "GETINFO entry-guards" command
  18801. when relays are down with an unreachable_since value. Previously,
  18802. we would report "up". Fixes bug 14184; bugfix on 0.1.2.2-alpha.
  18803. - Avoid crashing on a malformed EXTENDCIRCUIT command. Fixes bug
  18804. 14116; bugfix on 0.2.2.9-alpha.
  18805. - Add a code for the END_CIRC_REASON_IP_NOW_REDUNDANT circuit close
  18806. reason. Fixes bug 14207; bugfix on 0.2.6.2-alpha.
  18807. o Minor bugfixes (directory authority):
  18808. - Allow directory authorities to fetch more data from one another if
  18809. they find themselves missing lots of votes. Previously, they had
  18810. been bumping against the 10 MB queued data limit. Fixes bug 14261;
  18811. bugfix on 0.1.2.5-alpha.
  18812. - Do not attempt to download extrainfo documents which we will be
  18813. unable to validate with a matching server descriptor. Fixes bug
  18814. 13762; bugfix on 0.2.0.1-alpha.
  18815. - Fix a bug that was truncating AUTHDIR_NEWDESC events sent to the
  18816. control port. Fixes bug 14953; bugfix on 0.2.0.1-alpha.
  18817. - Enlarge the buffer to read bwauth generated files to avoid an
  18818. issue when parsing the file in dirserv_read_measured_bandwidths().
  18819. Fixes bug 14125; bugfix on 0.2.2.1-alpha.
  18820. o Minor bugfixes (file handling):
  18821. - Stop failing when key files are zero-length. Instead, generate new
  18822. keys, and overwrite the empty key files. Fixes bug 13111; bugfix
  18823. on all versions of Tor. Patch by "teor".
  18824. - Stop generating a fresh .old RSA onion key file when the .old file
  18825. is missing. Fixes part of 13111; bugfix on 0.0.6rc1.
  18826. - Avoid overwriting .old key files with empty key files.
  18827. - Skip loading zero-length extrainfo store, router store, stats,
  18828. state, and key files.
  18829. - Avoid crashing when trying to reload a torrc specified as a
  18830. relative path with RunAsDaemon turned on. Fixes bug 13397; bugfix
  18831. on 0.2.3.11-alpha.
  18832. o Minor bugfixes (hidden services):
  18833. - Close the introduction circuit when we have no more usable intro
  18834. points, instead of waiting for it to time out. This also ensures
  18835. that no follow-up HS descriptor fetch is triggered when the
  18836. circuit eventually times out. Fixes bug 14224; bugfix on 0.0.6.
  18837. - When fetching a hidden service descriptor for a down service that
  18838. was recently up, do not keep refetching until we try the same
  18839. replica twice in a row. Fixes bug 14219; bugfix on 0.2.0.10-alpha.
  18840. - Successfully launch Tor with a nonexistent hidden service
  18841. directory. Our fix for bug 13942 didn't catch this case. Fixes bug
  18842. 14106; bugfix on 0.2.6.2-alpha.
  18843. o Minor bugfixes (logging):
  18844. - Avoid crashing when there are more log domains than entries in
  18845. domain_list. Bugfix on 0.2.3.1-alpha.
  18846. - Add a string representation for LD_SCHED. Fixes bug 14740; bugfix
  18847. on 0.2.6.1-alpha.
  18848. - Don't log messages to stdout twice when starting up. Fixes bug
  18849. 13993; bugfix on 0.2.6.1-alpha.
  18850. o Minor bugfixes (parsing):
  18851. - Stop accepting milliseconds (or other junk) at the end of
  18852. descriptor publication times. Fixes bug 9286; bugfix on 0.0.2pre25.
  18853. - Support two-number and three-number version numbers correctly, in
  18854. case we change the Tor versioning system in the future. Fixes bug
  18855. 13661; bugfix on 0.0.8pre1.
  18856. o Minor bugfixes (path counting):
  18857. - When deciding whether the consensus lists any exit nodes, count
  18858. the number listed in the consensus, not the number we have
  18859. descriptors for. Fixes part of bug 14918; bugfix on 0.2.6.2-alpha.
  18860. - When deciding whether we have any exit nodes, only examine
  18861. ExitNodes when the ExitNodes option is actually set. Fixes part of
  18862. bug 14918; bugfix on 0.2.6.2-alpha.
  18863. - Get rid of redundant and possibly scary warnings that we are
  18864. missing directory information while we bootstrap. Fixes part of
  18865. bug 14918; bugfix on 0.2.6.2-alpha.
  18866. o Minor bugfixes (portability):
  18867. - Fix the ioctl()-based network interface lookup code so that it
  18868. will work on systems that have variable-length struct ifreq, for
  18869. example Mac OS X.
  18870. - Fix scheduler compilation on targets where char is unsigned. Fixes
  18871. bug 14764; bugfix on 0.2.6.2-alpha. Reported by Christian Kujau.
  18872. o Minor bugfixes (sandbox):
  18873. - Allow glibc fatal errors to be sent to stderr before Tor exits.
  18874. Previously, glibc would try to write them to /dev/tty, and the
  18875. sandbox would trap the call and make Tor exit prematurely. Fixes
  18876. bug 14759; bugfix on 0.2.5.1-alpha.
  18877. o Minor bugfixes (shutdown):
  18878. - When shutting down, always call event_del() on lingering read or
  18879. write events before freeing them. Otherwise, we risk double-frees
  18880. or read-after-frees in event_base_free(). Fixes bug 12985; bugfix
  18881. on 0.1.0.2-rc.
  18882. o Minor bugfixes (small memory leaks):
  18883. - Avoid leaking memory when using IPv6 virtual address mappings.
  18884. Fixes bug 14123; bugfix on 0.2.4.7-alpha. Patch by Tom van
  18885. der Woerdt.
  18886. o Minor bugfixes (statistics):
  18887. - Increase period over which bandwidth observations are aggregated
  18888. from 15 minutes to 4 hours. Fixes bug 13988; bugfix on 0.0.8pre1.
  18889. o Minor bugfixes (systemd support):
  18890. - Fix detection and operation of systemd watchdog. Fixes part of bug
  18891. 14141; bugfix on 0.2.6.2-alpha. Patch from Tomasz Torcz.
  18892. - Run correctly under systemd with the RunAsDaemon option set. Fixes
  18893. part of bug 14141; bugfix on 0.2.5.7-rc. Patch from Tomasz Torcz.
  18894. - Inform the systemd supervisor about more changes in the Tor
  18895. process status. Implements part of ticket 14141. Patch from
  18896. Tomasz Torcz.
  18897. - Cause the "--disable-systemd" option to actually disable systemd
  18898. support. Fixes bug 14350; bugfix on 0.2.6.2-alpha. Patch
  18899. from "blueness".
  18900. o Minor bugfixes (TLS):
  18901. - Check more thoroughly throughout the TLS code for possible
  18902. unlogged TLS errors. Possible diagnostic or fix for bug 13319.
  18903. o Minor bugfixes (transparent proxy):
  18904. - Use getsockname, not getsockopt, to retrieve the address for a
  18905. TPROXY-redirected connection. Fixes bug 13796; bugfix
  18906. on 0.2.5.2-alpha.
  18907. o Code simplification and refactoring:
  18908. - Move fields related to isolating and configuring client ports into
  18909. a shared structure. Previously, they were duplicated across
  18910. port_cfg_t, listener_connection_t, and edge_connection_t. Failure
  18911. to copy them correctly had been the cause of at least one bug in
  18912. the past. Closes ticket 8546.
  18913. - Refactor the get_interface_addresses_raw() doom-function into
  18914. multiple smaller and simpler subfunctions. Cover the resulting
  18915. subfunctions with unit-tests. Fixes a significant portion of
  18916. issue 12376.
  18917. - Remove workaround in dirserv_thinks_router_is_hs_dir() that was
  18918. only for version <= 0.2.2.24 which is now deprecated. Closes
  18919. ticket 14202.
  18920. - Remove a test for a long-defunct broken version-one
  18921. directory server.
  18922. o Documentation:
  18923. - Adding section on OpenBSD to our TUNING document. Thanks to mmcc
  18924. for writing the OpenBSD-specific tips. Resolves ticket 13702.
  18925. - Make the tor-resolve documentation match its help string and its
  18926. options. Resolves part of ticket 14325.
  18927. - Log a more useful error message from tor-resolve when failing to
  18928. look up a hidden service address. Resolves part of ticket 14325.
  18929. o Downgraded warnings:
  18930. - Don't warn when we've attempted to contact a relay using the wrong
  18931. ntor onion key. Closes ticket 9635.
  18932. o Removed features:
  18933. - To avoid confusion with the "ExitRelay" option, "ExitNode" is no
  18934. longer silently accepted as an alias for "ExitNodes".
  18935. - The --enable-mempool and --enable-buf-freelists options, which
  18936. were originally created to work around bad malloc implementations,
  18937. no longer exist. They were off-by-default in 0.2.5. Closes
  18938. ticket 14848.
  18939. o Testing:
  18940. - Make the checkdir/perms test complete successfully even if the
  18941. global umask is not 022. Fixes bug 14215; bugfix on 0.2.6.2-alpha.
  18942. - Test that tor does not fail when key files are zero-length. Check
  18943. that tor generates new keys, and overwrites the empty key files.
  18944. - Test that tor generates new keys when keys are missing
  18945. (existing behavior).
  18946. - Test that tor does not overwrite key files that already contain
  18947. data (existing behavior). Tests bug 13111. Patch by "teor".
  18948. - New "make test-stem" target to run stem integration tests.
  18949. Requires that the "STEM_SOURCE_DIR" environment variable be set.
  18950. Closes ticket 14107.
  18951. - Make the test_cmdline_args.py script work correctly on Windows.
  18952. Patch from Gisle Vanem.
  18953. - Move the slower unit tests into a new "./src/test/test-slow"
  18954. binary that can be run independently of the other tests. Closes
  18955. ticket 13243.
  18956. - Avoid undefined behavior when sampling huge values from the
  18957. Laplace distribution. This made unittests fail on Raspberry Pi.
  18958. Bug found by Device. Fixes bug 14090; bugfix on 0.2.6.2-alpha.
  18959. Changes in version 0.2.6.2-alpha - 2014-12-31
  18960. Tor 0.2.6.2-alpha is the second alpha release in the 0.2.6.x series.
  18961. It introduces a major new backend for deciding when to send cells on
  18962. channels, which should lead down the road to big performance
  18963. increases. It contains security and statistics features for better
  18964. work on hidden services, and numerous bugfixes.
  18965. This release contains many new unit tests, along with major
  18966. performance improvements for running testing networks using Chutney.
  18967. Thanks to a series of patches contributed by "teor", testing networks
  18968. should now bootstrap in seconds, rather than minutes.
  18969. o Major features (relay, infrastructure):
  18970. - Complete revision of the code that relays use to decide which cell
  18971. to send next. Formerly, we selected the best circuit to write on
  18972. each channel, but we didn't select among channels in any
  18973. sophisticated way. Now, we choose the best circuits globally from
  18974. among those whose channels are ready to deliver traffic.
  18975. This patch implements a new inter-cmux comparison API, a global
  18976. high/low watermark mechanism and a global scheduler loop for
  18977. transmission prioritization across all channels as well as among
  18978. circuits on one channel. This schedule is currently tuned to
  18979. (tolerantly) avoid making changes in network performance, but it
  18980. should form the basis for major circuit performance increases in
  18981. the future. Code by Andrea; tuning by Rob Jansen; implements
  18982. ticket 9262.
  18983. o Major features (hidden services):
  18984. - Make HS port scanning more difficult by immediately closing the
  18985. circuit when a user attempts to connect to a nonexistent port.
  18986. Closes ticket 13667.
  18987. - Add a HiddenServiceStatistics option that allows Tor relays to
  18988. gather and publish statistics about the overall size and volume of
  18989. hidden service usage. Specifically, when this option is turned on,
  18990. an HSDir will publish an approximate number of hidden services
  18991. that have published descriptors to it the past 24 hours. Also, if
  18992. a relay has acted as a hidden service rendezvous point, it will
  18993. publish the approximate amount of rendezvous cells it has relayed
  18994. the past 24 hours. The statistics themselves are obfuscated so
  18995. that the exact values cannot be derived. For more details see
  18996. proposal 238, "Better hidden service stats from Tor relays". This
  18997. feature is currently disabled by default. Implements feature 13192.
  18998. o Major bugfixes (client, automap):
  18999. - Repair automapping with IPv6 addresses. This automapping should
  19000. have worked previously, but one piece of debugging code that we
  19001. inserted to detect a regression actually caused the regression to
  19002. manifest itself again. Fixes bug 13811 and bug 12831; bugfix on
  19003. 0.2.4.7-alpha. Diagnosed and fixed by Francisco Blas
  19004. Izquierdo Riera.
  19005. o Major bugfixes (hidden services):
  19006. - When closing an introduction circuit that was opened in parallel
  19007. with others, don't mark the introduction point as unreachable.
  19008. Previously, the first successful connection to an introduction
  19009. point would make the other introduction points get marked as
  19010. having timed out. Fixes bug 13698; bugfix on 0.0.6rc2.
  19011. o Directory authority changes:
  19012. - Remove turtles as a directory authority.
  19013. - Add longclaw as a new (v3) directory authority. This implements
  19014. ticket 13296. This keeps the directory authority count at 9.
  19015. o Major removed features:
  19016. - Tor clients no longer support connecting to hidden services
  19017. running on Tor 0.2.2.x and earlier; the Support022HiddenServices
  19018. option has been removed. (There shouldn't be any hidden services
  19019. running these versions on the network.) Closes ticket 7803.
  19020. o Minor features (client):
  19021. - Validate hostnames in SOCKS5 requests more strictly. If SafeSocks
  19022. is enabled, reject requests with IP addresses as hostnames.
  19023. Resolves ticket 13315.
  19024. o Minor features (controller):
  19025. - Add a "SIGNAL HEARTBEAT" controller command that tells Tor to
  19026. write an unscheduled heartbeat message to the log. Implements
  19027. feature 9503.
  19028. o Minor features (geoip):
  19029. - Update geoip and geoip6 to the November 15 2014 Maxmind GeoLite2
  19030. Country database.
  19031. o Minor features (hidden services):
  19032. - When re-enabling the network, don't try to build introduction
  19033. circuits until we have successfully built a circuit. This makes
  19034. hidden services come up faster when the network is re-enabled.
  19035. Patch from "akwizgran". Closes ticket 13447.
  19036. - When we fail to retrieve a hidden service descriptor, send the
  19037. controller an "HS_DESC FAILED" controller event. Implements
  19038. feature 13212.
  19039. - New HiddenServiceDirGroupReadable option to cause hidden service
  19040. directories and hostname files to be created group-readable. Patch
  19041. from "anon", David Stainton, and "meejah". Closes ticket 11291.
  19042. o Minor features (systemd):
  19043. - Where supported, when running with systemd, report successful
  19044. startup to systemd. Part of ticket 11016. Patch by Michael Scherer.
  19045. - When running with systemd, support systemd watchdog messages. Part
  19046. of ticket 11016. Patch by Michael Scherer.
  19047. o Minor features (transparent proxy):
  19048. - Update the transparent proxy option checks to allow for both ipfw
  19049. and pf on OS X. Closes ticket 14002.
  19050. - Use the correct option when using IPv6 with transparent proxy
  19051. support on Linux. Resolves 13808. Patch by Francisco Blas
  19052. Izquierdo Riera.
  19053. o Minor bugfixes (preventative security, C safety):
  19054. - When reading a hexadecimal, base-32, or base-64 encoded value from
  19055. a string, always overwrite the whole output buffer. This prevents
  19056. some bugs where we would look at (but fortunately, not reveal)
  19057. uninitialized memory on the stack. Fixes bug 14013; bugfix on all
  19058. versions of Tor.
  19059. - Clear all memory targeted by tor_addr_{to,from}_sockaddr(), not
  19060. just the part that's used. This makes it harder for data leak bugs
  19061. to occur in the event of other programming failures. Resolves
  19062. ticket 14041.
  19063. o Minor bugfixes (client, microdescriptors):
  19064. - Use a full 256 bits of the SHA256 digest of a microdescriptor when
  19065. computing which microdescriptors to download. This keeps us from
  19066. erroneous download behavior if two microdescriptor digests ever
  19067. have the same first 160 bits. Fixes part of bug 13399; bugfix
  19068. on 0.2.3.1-alpha.
  19069. - Reset a router's status if its microdescriptor digest changes,
  19070. even if the first 160 bits remain the same. Fixes part of bug
  19071. 13399; bugfix on 0.2.3.1-alpha.
  19072. o Minor bugfixes (compilation):
  19073. - Silence clang warnings under --enable-expensive-hardening,
  19074. including implicit truncation of 64 bit values to 32 bit, const
  19075. char assignment to self, tautological compare, and additional
  19076. parentheses around equality tests. Fixes bug 13577; bugfix
  19077. on 0.2.5.4-alpha.
  19078. - Fix a clang warning about checking whether an address in the
  19079. middle of a structure is NULL. Fixes bug 14001; bugfix
  19080. on 0.2.1.2-alpha.
  19081. o Minor bugfixes (hidden services):
  19082. - Correctly send a controller event when we find that a rendezvous
  19083. circuit has finished. Fixes bug 13936; bugfix on 0.1.1.5-alpha.
  19084. - Pre-check directory permissions for new hidden-services to avoid
  19085. at least one case of "Bug: Acting on config options left us in a
  19086. broken state. Dying." Fixes bug 13942; bugfix on 0.0.6pre1.
  19087. - When adding a new hidden service (for example, via SETCONF), Tor
  19088. no longer congratulates the user for running a relay. Fixes bug
  19089. 13941; bugfix on 0.2.6.1-alpha.
  19090. - When fetching hidden service descriptors, we now check not only
  19091. for whether we got the hidden service we had in mind, but also
  19092. whether we got the particular descriptors we wanted. This prevents
  19093. a class of inefficient but annoying DoS attacks by hidden service
  19094. directories. Fixes bug 13214; bugfix on 0.2.1.6-alpha. Reported
  19095. by "special".
  19096. o Minor bugfixes (Linux seccomp2 sandbox):
  19097. - Make transparent proxy support work along with the seccomp2
  19098. sandbox. Fixes part of bug 13808; bugfix on 0.2.5.1-alpha. Patch
  19099. by Francisco Blas Izquierdo Riera.
  19100. - Fix a memory leak in tor-resolve when running with the sandbox
  19101. enabled. Fixes bug 14050; bugfix on 0.2.5.9-rc.
  19102. o Minor bugfixes (logging):
  19103. - Downgrade warnings about RSA signature failures to info log level.
  19104. Emit a warning when an extra info document is found incompatible
  19105. with a corresponding router descriptor. Fixes bug 9812; bugfix
  19106. on 0.0.6rc3.
  19107. - Make connection_ap_handshake_attach_circuit() log the circuit ID
  19108. correctly. Fixes bug 13701; bugfix on 0.0.6.
  19109. o Minor bugfixes (misc):
  19110. - Stop allowing invalid address patterns like "*/24" that contain
  19111. both a wildcard address and a bit prefix length. This affects all
  19112. our address-range parsing code. Fixes bug 7484; bugfix
  19113. on 0.0.2pre14.
  19114. o Minor bugfixes (testing networks, fast startup):
  19115. - Allow Tor to build circuits using a consensus with no exits. If
  19116. the consensus has no exits (typical of a bootstrapping test
  19117. network), allow Tor to build circuits once enough descriptors have
  19118. been downloaded. This assists in bootstrapping a testing Tor
  19119. network. Fixes bug 13718; bugfix on 0.2.4.10-alpha. Patch
  19120. by "teor".
  19121. - When V3AuthVotingInterval is low, give a lower If-Modified-Since
  19122. header to directory servers. This allows us to obtain consensuses
  19123. promptly when the consensus interval is very short. This assists
  19124. in bootstrapping a testing Tor network. Fixes parts of bugs 13718
  19125. and 13963; bugfix on 0.2.0.3-alpha. Patch by "teor".
  19126. - Stop assuming that private addresses are local when checking
  19127. reachability in a TestingTorNetwork. Instead, when testing, assume
  19128. all OR connections are remote. (This is necessary due to many test
  19129. scenarios running all relays on localhost.) This assists in
  19130. bootstrapping a testing Tor network. Fixes bug 13924; bugfix on
  19131. 0.1.0.1-rc. Patch by "teor".
  19132. - Avoid building exit circuits from a consensus with no exits. Now
  19133. thanks to our fix for 13718, we accept a no-exit network as not
  19134. wholly lost, but we need to remember not to try to build exit
  19135. circuits on it. Closes ticket 13814; patch by "teor".
  19136. - Stop requiring exits to have non-zero bandwithcapacity in a
  19137. TestingTorNetwork. Instead, when TestingMinExitFlagThreshold is 0,
  19138. ignore exit bandwidthcapacity. This assists in bootstrapping a
  19139. testing Tor network. Fixes parts of bugs 13718 and 13839; bugfix
  19140. on 0.2.0.3-alpha. Patch by "teor".
  19141. - Add "internal" to some bootstrap statuses when no exits are
  19142. available. If the consensus does not contain Exits, Tor will only
  19143. build internal circuits. In this case, relevant statuses will
  19144. contain the word "internal" as indicated in the Tor control-
  19145. spec.txt. When bootstrap completes, Tor will be ready to build
  19146. internal circuits. If a future consensus contains Exits, exit
  19147. circuits may become available. Fixes part of bug 13718; bugfix on
  19148. 0.2.4.10-alpha. Patch by "teor".
  19149. - Decrease minimum consensus interval to 10 seconds when
  19150. TestingTorNetwork is set, or 5 seconds for the first consensus.
  19151. Fix assumptions throughout the code that assume larger intervals.
  19152. Fixes bugs 13718 and 13823; bugfix on 0.2.0.3-alpha. Patch
  19153. by "teor".
  19154. - Avoid excluding guards from path building in minimal test
  19155. networks, when we're in a test network and excluding guards would
  19156. exclude all relays. This typically occurs in incredibly small tor
  19157. networks, and those using "TestingAuthVoteGuard *". Fixes part of
  19158. bug 13718; bugfix on 0.1.1.11-alpha. Patch by "teor".
  19159. o Code simplification and refactoring:
  19160. - Stop using can_complete_circuits as a global variable; access it
  19161. with a function instead.
  19162. - Avoid using operators directly as macro arguments: this lets us
  19163. apply coccinelle transformations to our codebase more directly.
  19164. Closes ticket 13172.
  19165. - Combine the functions used to parse ClientTransportPlugin and
  19166. ServerTransportPlugin into a single function. Closes ticket 6456.
  19167. - Add inline functions and convenience macros for inspecting channel
  19168. state. Refactor the code to use convenience macros instead of
  19169. checking channel state directly. Fixes issue 7356.
  19170. - Document all members of was_router_added_t and rename
  19171. ROUTER_WAS_NOT_NEW to ROUTER_IS_ALREADY_KNOWN to make it less
  19172. confusable with ROUTER_WAS_TOO_OLD. Fixes issue 13644.
  19173. - In connection_exit_begin_conn(), use END_CIRC_REASON_TORPROTOCOL
  19174. constant instead of hardcoded value. Fixes issue 13840.
  19175. - Refactor our generic strmap and digestmap types into a single
  19176. implementation, so that we can add a new digest256map
  19177. type trivially.
  19178. o Documentation:
  19179. - Document the bridge-authority-only 'networkstatus-bridges' file.
  19180. Closes ticket 13713; patch from "tom".
  19181. - Fix typo in PredictedPortsRelevanceTime option description in
  19182. manpage. Resolves issue 13707.
  19183. - Stop suggesting that users specify relays by nickname: it isn't a
  19184. good idea. Also, properly cross-reference how to specify relays in
  19185. all parts of manual documenting options that take a list of
  19186. relays. Closes ticket 13381.
  19187. - Clarify the HiddenServiceDir option description in manpage to make
  19188. it clear that relative paths are taken with respect to the current
  19189. working directory. Also clarify that this behavior is not
  19190. guaranteed to remain indefinitely. Fixes issue 13913.
  19191. o Testing:
  19192. - New tests for many parts of channel, relay, and circuitmux
  19193. functionality. Code by Andrea; part of 9262.
  19194. - New tests for parse_transport_line(). Part of ticket 6456.
  19195. - In the unit tests, use chgrp() to change the group of the unit
  19196. test temporary directory to the current user, so that the sticky
  19197. bit doesn't interfere with tests that check directory groups.
  19198. Closes 13678.
  19199. - Add unit tests for resolve_my_addr(). Part of ticket 12376; patch
  19200. by 'rl1987'.
  19201. Changes in version 0.2.6.1-alpha - 2014-10-30
  19202. Tor 0.2.6.1-alpha is the first release in the Tor 0.2.6.x series. It
  19203. includes numerous code cleanups and new tests, and fixes a large
  19204. number of annoying bugs. Out-of-memory conditions are handled better
  19205. than in 0.2.5, pluggable transports have improved proxy support, and
  19206. clients now use optimistic data for contacting hidden services. Also,
  19207. we are now more robust to changes in what we consider a parseable
  19208. directory object, so that tightening restrictions does not have a risk
  19209. of introducing infinite download loops.
  19210. This is the first alpha release in a new series, so expect there to be
  19211. bugs. Users who would rather test out a more stable branch should stay
  19212. with 0.2.5.x for now.
  19213. o New compiler and system requirements:
  19214. - Tor 0.2.6.x requires that your compiler support more of the C99
  19215. language standard than before. The 'configure' script now detects
  19216. whether your compiler supports C99 mid-block declarations and
  19217. designated initializers. If it does not, Tor will not compile.
  19218. We may revisit this requirement if it turns out that a significant
  19219. number of people need to build Tor with compilers that don't
  19220. bother implementing a 15-year-old standard. Closes ticket 13233.
  19221. - Tor no longer supports systems without threading support. When we
  19222. began working on Tor, there were several systems that didn't have
  19223. threads, or where the thread support wasn't able to run the
  19224. threads of a single process on multiple CPUs. That no longer
  19225. holds: every system where Tor needs to run well now has threading
  19226. support. Resolves ticket 12439.
  19227. o Removed platform support:
  19228. - We no longer include special code to build on Windows CE; as far
  19229. as we know, nobody has used Tor on Windows CE in a very long time.
  19230. Closes ticket 11446.
  19231. o Major features (bridges):
  19232. - Expose the outgoing upstream HTTP/SOCKS proxy to pluggable
  19233. transports if they are configured via the "TOR_PT_PROXY"
  19234. environment variable. Implements proposal 232. Resolves
  19235. ticket 8402.
  19236. o Major features (client performance, hidden services):
  19237. - Allow clients to use optimistic data when connecting to a hidden
  19238. service, which should remove a round-trip from hidden service
  19239. initialization. See proposal 181 for details. Implements
  19240. ticket 13211.
  19241. o Major features (directory system):
  19242. - Upon receiving an unparseable directory object, if its digest
  19243. matches what we expected, then don't try to download it again.
  19244. Previously, when we got a descriptor we didn't like, we would keep
  19245. trying to download it over and over. Closes ticket 11243.
  19246. o Major features (sample torrc):
  19247. - Add a new, infrequently-changed "torrc.minimal". This file is
  19248. similar to torrc.sample, but it will change as infrequently as
  19249. possible, for the benefit of users whose systems prompt them for
  19250. intervention whenever a default configuration file is changed.
  19251. Making this change allows us to update torrc.sample to be a more
  19252. generally useful "sample torrc".
  19253. o Major bugfixes (directory authorities):
  19254. - Do not assign the HSDir flag to relays if they are not Valid, or
  19255. currently hibernating. Fixes 12573; bugfix on 0.2.0.10-alpha.
  19256. o Major bugfixes (directory bandwidth performance):
  19257. - Don't flush the zlib buffer aggressively when compressing
  19258. directory information for clients. This should save about 7% of
  19259. the bandwidth currently used for compressed descriptors and
  19260. microdescriptors. Fixes bug 11787; bugfix on 0.1.1.23.
  19261. o Minor features (security, memory wiping):
  19262. - Ensure we securely wipe keys from memory after
  19263. crypto_digest_get_digest and init_curve25519_keypair_from_file
  19264. have finished using them. Resolves ticket 13477.
  19265. o Minor features (security, out-of-memory handling):
  19266. - When handling an out-of-memory condition, allocate less memory for
  19267. temporary data structures. Fixes issue 10115.
  19268. - When handling an out-of-memory condition, consider more types of
  19269. buffers, including those on directory connections, and zlib
  19270. buffers. Resolves ticket 11792.
  19271. o Minor features:
  19272. - When identity keypair is generated for first time, log a
  19273. congratulatory message that links to the new relay lifecycle
  19274. document. Implements feature 10427.
  19275. o Minor features (client):
  19276. - Clients are now willing to send optimistic data (before they
  19277. receive a 'connected' cell) to relays of any version. (Relays
  19278. without support for optimistic data are no longer supported on the
  19279. Tor network.) Resolves ticket 13153.
  19280. o Minor features (directory authorities):
  19281. - Don't list relays with a bandwidth estimate of 0 in the consensus.
  19282. Implements a feature proposed during discussion of bug 13000.
  19283. - In tor-gencert, report an error if the user provides the same
  19284. argument more than once.
  19285. - If a directory authority can't find a best consensus method in the
  19286. votes that it holds, it now falls back to its favorite consensus
  19287. method. Previously, it fell back to method 1. Neither of these is
  19288. likely to get enough signatures, but "fall back to favorite"
  19289. doesn't require us to maintain support an obsolete consensus
  19290. method. Implements part of proposal 215.
  19291. o Minor features (logging):
  19292. - On Unix-like systems, you can now use named pipes as the target of
  19293. the Log option, and other options that try to append to files.
  19294. Closes ticket 12061. Patch from "carlo von lynX".
  19295. - When opening a log file at startup, send it every log message that
  19296. we generated between startup and opening it. Previously, log
  19297. messages that were generated before opening the log file were only
  19298. logged to stdout. Closes ticket 6938.
  19299. - Add a TruncateLogFile option to overwrite logs instead of
  19300. appending to them. Closes ticket 5583.
  19301. o Minor features (portability, Solaris):
  19302. - Threads are no longer disabled by default on Solaris; we believe
  19303. that the versions of Solaris with broken threading support are all
  19304. obsolete by now. Resolves ticket 9495.
  19305. o Minor features (relay):
  19306. - Re-check our address after we detect a changed IP address from
  19307. getsockname(). This ensures that the controller command "GETINFO
  19308. address" will report the correct value. Resolves ticket 11582.
  19309. Patch from "ra".
  19310. - A new AccountingRule option lets Relays set whether they'd like
  19311. AccountingMax to be applied separately to inbound and outbound
  19312. traffic, or applied to the sum of inbound and outbound traffic.
  19313. Resolves ticket 961. Patch by "chobe".
  19314. o Minor features (testing networks):
  19315. - Add the TestingDirAuthVoteExit option, which lists nodes to assign
  19316. the "Exit" flag regardless of their uptime, bandwidth, or exit
  19317. policy. TestingTorNetwork must be set for this option to have any
  19318. effect. Previously, authorities would take up to 35 minutes to
  19319. give nodes the Exit flag in a test network. Partially implements
  19320. ticket 13161.
  19321. o Minor features (validation):
  19322. - Check all date/time values passed to tor_timegm and
  19323. parse_rfc1123_time for validity, taking leap years into account.
  19324. Improves HTTP header validation. Implemented with bug 13476.
  19325. - In correct_tm(), limit the range of values returned by system
  19326. localtime(_r) and gmtime(_r) to be between the years 1 and 8099.
  19327. This means we don't have to deal with negative or too large dates,
  19328. even if a clock is wrong. Otherwise we might fail to read a file
  19329. written by us which includes such a date. Fixes bug 13476.
  19330. o Minor bugfixes (bridge clients):
  19331. - When configured to use a bridge without an identity digest (not
  19332. recommended), avoid launching an extra channel to it when
  19333. bootstrapping. Fixes bug 7733; bugfix on 0.2.4.4-alpha.
  19334. o Minor bugfixes (bridges):
  19335. - When DisableNetwork is set, do not launch pluggable transport
  19336. plugins, and if any are running, terminate them. Fixes bug 13213;
  19337. bugfix on 0.2.3.6-alpha.
  19338. o Minor bugfixes (C correctness):
  19339. - Fix several instances of possible integer overflow/underflow/NaN.
  19340. Fixes bug 13104; bugfix on 0.2.3.1-alpha and later. Patches
  19341. from "teor".
  19342. - In circuit_build_times_calculate_timeout() in circuitstats.c,
  19343. avoid dividing by zero in the pareto calculations. This traps
  19344. under clang's "undefined-trap" sanitizer. Fixes bug 13290; bugfix
  19345. on 0.2.2.2-alpha.
  19346. - Fix an integer overflow in format_time_interval(). Fixes bug
  19347. 13393; bugfix on 0.2.0.10-alpha.
  19348. - Set the correct day of year value when the system's localtime(_r)
  19349. or gmtime(_r) functions fail to set struct tm. Not externally
  19350. visible. Fixes bug 13476; bugfix on 0.0.2pre14.
  19351. - Avoid unlikely signed integer overflow in tor_timegm on systems
  19352. with 32-bit time_t. Fixes bug 13476; bugfix on 0.0.2pre14.
  19353. o Minor bugfixes (client):
  19354. - Fix smartlist_choose_node_by_bandwidth() so that relays with the
  19355. BadExit flag are not considered worthy candidates. Fixes bug
  19356. 13066; bugfix on 0.1.2.3-alpha.
  19357. - Use the consensus schedule for downloading consensuses, and not
  19358. the generic schedule. Fixes bug 11679; bugfix on 0.2.2.6-alpha.
  19359. - Handle unsupported or malformed SOCKS5 requests properly by
  19360. responding with the appropriate error message before closing the
  19361. connection. Fixes bugs 12971 and 13314; bugfix on 0.0.2pre13.
  19362. o Minor bugfixes (client, torrc):
  19363. - Stop modifying the value of our DirReqStatistics torrc option just
  19364. because we're not a bridge or relay. This bug was causing Tor
  19365. Browser users to write "DirReqStatistics 0" in their torrc files
  19366. as if they had chosen to change the config. Fixes bug 4244; bugfix
  19367. on 0.2.3.1-alpha.
  19368. - When GeoIPExcludeUnknown is enabled, do not incorrectly decide
  19369. that our options have changed every time we SIGHUP. Fixes bug
  19370. 9801; bugfix on 0.2.4.10-alpha. Patch from "qwerty1".
  19371. o Minor bugfixes (controller):
  19372. - Return an error when the second or later arguments of the
  19373. "setevents" controller command are invalid events. Previously we
  19374. would return success while silently skipping invalid events. Fixes
  19375. bug 13205; bugfix on 0.2.3.2-alpha. Reported by "fpxnns".
  19376. o Minor bugfixes (directory system):
  19377. - Always believe that v3 directory authorities serve extra-info
  19378. documents, whether they advertise "caches-extra-info" or not.
  19379. Fixes part of bug 11683; bugfix on 0.2.0.1-alpha.
  19380. - When running as a v3 directory authority, advertise that you serve
  19381. extra-info documents so that clients who want them can find them
  19382. from you too. Fixes part of bug 11683; bugfix on 0.2.0.1-alpha.
  19383. - Check the BRIDGE_DIRINFO flag bitwise rather than using equality.
  19384. Previously, directories offering BRIDGE_DIRINFO and some other
  19385. flag (i.e. microdescriptors or extrainfo) would be ignored when
  19386. looking for bridges. Partially fixes bug 13163; bugfix
  19387. on 0.2.0.7-alpha.
  19388. o Minor bugfixes (networking):
  19389. - Check for orconns and use connection_or_close_for_error() rather
  19390. than connection_mark_for_close() directly in the getsockopt()
  19391. failure case of connection_handle_write_impl(). Fixes bug 11302;
  19392. bugfix on 0.2.4.4-alpha.
  19393. o Minor bugfixes (relay):
  19394. - When generating our family list, remove spaces from around the
  19395. entries. Fixes bug 12728; bugfix on 0.2.1.7-alpha.
  19396. - If our previous bandwidth estimate was 0 bytes, allow publishing a
  19397. new relay descriptor immediately. Fixes bug 13000; bugfix
  19398. on 0.1.1.6-alpha.
  19399. o Minor bugfixes (testing networks):
  19400. - Fix TestingDirAuthVoteGuard to properly give out Guard flags in a
  19401. testing network. Fixes bug 13064; bugfix on 0.2.5.2-alpha.
  19402. - Stop using the default authorities in networks which provide both
  19403. AlternateDirAuthority and AlternateBridgeAuthority. Partially
  19404. fixes bug 13163; bugfix on 0.2.0.13-alpha.
  19405. o Minor bugfixes (testing):
  19406. - Stop spawn test failures due to a race condition between the
  19407. SIGCHLD handler updating the process status, and the test reading
  19408. it. Fixes bug 13291; bugfix on 0.2.3.3-alpha.
  19409. o Minor bugfixes (testing, Windows):
  19410. - Avoid passing an extra backslash when creating a temporary
  19411. directory for running the unit tests on Windows. Fixes bug 12392;
  19412. bugfix on 0.2.2.25-alpha. Patch from Gisle Vanem.
  19413. o Minor bugfixes (windows):
  19414. - Remove code to special-case handling of NTE_BAD_KEYSET when
  19415. acquiring windows CryptoAPI context. This error can't actually
  19416. occur for the parameters we're providing. Fixes bug 10816; bugfix
  19417. on 0.0.2pre26.
  19418. o Minor bugfixes (zlib):
  19419. - Avoid truncating a zlib stream when trying to finalize it with an
  19420. empty output buffer. Fixes bug 11824; bugfix on 0.1.1.23.
  19421. o Build fixes:
  19422. - Allow our configure script to build correctly with autoconf 2.62
  19423. again. Fixes bug 12693; bugfix on 0.2.5.2-alpha.
  19424. - Improve the error message from ./configure to make it clear that
  19425. when asciidoc has not been found, the user will have to either add
  19426. --disable-asciidoc argument or install asciidoc. Resolves
  19427. ticket 13228.
  19428. o Code simplification and refactoring:
  19429. - Change the entry_is_live() function to take named bitfield
  19430. elements instead of an unnamed list of booleans. Closes
  19431. ticket 12202.
  19432. - Refactor and unit-test entry_is_time_to_retry() in entrynodes.c.
  19433. Resolves ticket 12205.
  19434. - Use calloc and reallocarray functions instead of multiply-
  19435. then-malloc. This makes it less likely for us to fall victim to an
  19436. integer overflow attack when allocating. Resolves ticket 12855.
  19437. - Use the standard macro name SIZE_MAX, instead of our
  19438. own SIZE_T_MAX.
  19439. - Document usage of the NO_DIRINFO and ALL_DIRINFO flags clearly in
  19440. functions which take them as arguments. Replace 0 with NO_DIRINFO
  19441. in a function call for clarity. Seeks to prevent future issues
  19442. like 13163.
  19443. - Avoid 4 null pointer errors under clang static analysis by using
  19444. tor_assert() to prove that the pointers aren't null. Fixes
  19445. bug 13284.
  19446. - Rework the API of policies_parse_exit_policy() to use a bitmask to
  19447. represent parsing options, instead of a confusing mess of
  19448. booleans. Resolves ticket 8197.
  19449. - Introduce a helper function to parse ExitPolicy in
  19450. or_options_t structure.
  19451. o Documentation:
  19452. - Add a doc/TUNING document with tips for handling large numbers of
  19453. TCP connections when running busy Tor relay. Update the warning
  19454. message to point to this file when running out of sockets
  19455. operating system is allowing to use simultaneously. Resolves
  19456. ticket 9708.
  19457. o Removed features:
  19458. - We no longer remind the user about configuration options that have
  19459. been obsolete since 0.2.3.x or earlier. Patch by Adrien Bak.
  19460. - Remove our old, non-weighted bandwidth-based node selection code.
  19461. Previously, we used it as a fallback when we couldn't perform
  19462. weighted bandwidth-based node selection. But that would only
  19463. happen in the cases where we had no consensus, or when we had a
  19464. consensus generated by buggy or ancient directory authorities. In
  19465. either case, it's better to use the more modern, better maintained
  19466. algorithm, with reasonable defaults for the weights. Closes
  19467. ticket 13126.
  19468. - Remove the --disable-curve25519 configure option. Relays and
  19469. clients now are required to support curve25519 and the
  19470. ntor handshake.
  19471. - The old "StrictEntryNodes" and "StrictExitNodes" options, which
  19472. used to be deprecated synonyms for "StrictNodes", are now marked
  19473. obsolete. Resolves ticket 12226.
  19474. - Clients don't understand the BadDirectory flag in the consensus
  19475. anymore, and ignore it.
  19476. o Testing:
  19477. - Refactor the function that chooses guard nodes so that it can more
  19478. easily be tested; write some tests for it.
  19479. - Fix and re-enable the fgets_eagain unit test. Fixes bug 12503;
  19480. bugfix on 0.2.3.1-alpha. Patch from "cypherpunks."
  19481. - Create unit tests for format_time_interval(). With bug 13393.
  19482. - Add unit tests for tor_timegm signed overflow, tor_timegm and
  19483. parse_rfc1123_time validity checks, correct_tm year clamping. Unit
  19484. tests (visible) fixes in bug 13476.
  19485. - Add a "coverage-html" make target to generate HTML-visualized
  19486. coverage results when building with --enable-coverage. (Requires
  19487. lcov.) Patch from Kevin Murray.
  19488. - Enable the backtrace handler (where supported) when running the
  19489. unit tests.
  19490. - Revise all unit tests that used the legacy test_* macros to
  19491. instead use the recommended tt_* macros. This patch was generated
  19492. with coccinelle, to avoid manual errors. Closes ticket 13119.
  19493. o Distribution (systemd):
  19494. - systemd unit file: only allow tor to write to /var/lib/tor and
  19495. /var/log/tor. The rest of the filesystem is accessible for reading
  19496. only. Patch by intrigeri; resolves ticket 12751.
  19497. - systemd unit file: ensure that the process and all its children
  19498. can never gain new privileges. Patch by intrigeri; resolves
  19499. ticket 12939.
  19500. - systemd unit file: set up /var/run/tor as writable for the Tor
  19501. service. Patch by intrigeri; resolves ticket 13196.
  19502. o Removed features (directory authorities):
  19503. - Remove code that prevented authorities from listing Tor relays
  19504. affected by CVE-2011-2769 as guards. These relays are already
  19505. rejected altogether due to the minimum version requirement of
  19506. 0.2.3.16-alpha. Closes ticket 13152.
  19507. - The "AuthDirRejectUnlisted" option no longer has any effect, as
  19508. the fingerprints file (approved-routers) has been deprecated.
  19509. - Directory authorities do not support being Naming dirauths anymore.
  19510. The "NamingAuthoritativeDir" config option is now obsolete.
  19511. - Directory authorities do not support giving out the BadDirectory
  19512. flag anymore.
  19513. - Directory authorities no longer advertise or support consensus
  19514. methods 1 through 12 inclusive. These consensus methods were
  19515. obsolete and/or insecure: maintaining the ability to support them
  19516. served no good purpose. Implements part of proposal 215; closes
  19517. ticket 10163.
  19518. o Testing (test-network.sh):
  19519. - Stop using "echo -n", as some shells' built-in echo doesn't
  19520. support "-n". Instead, use "/bin/echo -n". Partially fixes
  19521. bug 13161.
  19522. - Stop an apparent test-network hang when used with make -j2. Fixes
  19523. bug 13331.
  19524. - Add a --delay option to test-network.sh, which configures the
  19525. delay before the chutney network tests for data transmission.
  19526. Partially implements ticket 13161.
  19527. Changes in version 0.2.5.10 - 2014-10-24
  19528. Tor 0.2.5.10 is the first stable release in the 0.2.5 series.
  19529. It adds several new security features, including improved
  19530. denial-of-service resistance for relays, new compiler hardening
  19531. options, and a system-call sandbox for hardened installations on Linux
  19532. (requires seccomp2). The controller protocol has several new features,
  19533. resolving IPv6 addresses should work better than before, and relays
  19534. should be a little more CPU-efficient. We've added support for more
  19535. OpenBSD and FreeBSD transparent proxy types. We've improved the build
  19536. system and testing infrastructure to allow unit testing of more parts
  19537. of the Tor codebase. Finally, we've addressed several nagging pluggable
  19538. transport usability issues, and included numerous other small bugfixes
  19539. and features mentioned below.
  19540. This release marks end-of-life for Tor 0.2.3.x; those Tor versions
  19541. have accumulated many known flaws; everyone should upgrade.
  19542. o Deprecated versions:
  19543. - Tor 0.2.3.x has reached end-of-life; it has received no patches or
  19544. attention for some while.
  19545. Changes in version 0.2.5.9-rc - 2014-10-20
  19546. Tor 0.2.5.9-rc is the third release candidate for the Tor 0.2.5.x
  19547. series. It disables SSL3 in response to the recent "POODLE" attack
  19548. (even though POODLE does not affect Tor). It also works around a crash
  19549. bug caused by some operating systems' response to the "POODLE" attack
  19550. (which does affect Tor). It also contains a few miscellaneous fixes.
  19551. o Major security fixes:
  19552. - Disable support for SSLv3. All versions of OpenSSL in use with Tor
  19553. today support TLS 1.0 or later, so we can safely turn off support
  19554. for this old (and insecure) protocol. Fixes bug 13426.
  19555. o Major bugfixes (openssl bug workaround):
  19556. - Avoid crashing when using OpenSSL version 0.9.8zc, 1.0.0o, or
  19557. 1.0.1j, built with the 'no-ssl3' configuration option. Fixes bug
  19558. 13471. This is a workaround for an OpenSSL bug.
  19559. o Minor bugfixes:
  19560. - Disable the sandbox name resolver cache when running tor-resolve:
  19561. tor-resolve doesn't use the sandbox code, and turning it on was
  19562. breaking attempts to do tor-resolve on a non-default server on
  19563. Linux. Fixes bug 13295; bugfix on 0.2.5.3-alpha.
  19564. o Compilation fixes:
  19565. - Build and run correctly on systems like OpenBSD-current that have
  19566. patched OpenSSL to remove get_cipher_by_char and/or its
  19567. implementations. Fixes issue 13325.
  19568. o Downgraded warnings:
  19569. - Downgrade the severity of the 'unexpected sendme cell from client'
  19570. from 'warn' to 'protocol warning'. Closes ticket 8093.
  19571. Changes in version 0.2.4.25 - 2014-10-20
  19572. Tor 0.2.4.25 disables SSL3 in response to the recent "POODLE" attack
  19573. (even though POODLE does not affect Tor). It also works around a crash
  19574. bug caused by some operating systems' response to the "POODLE" attack
  19575. (which does affect Tor).
  19576. o Major security fixes (also in 0.2.5.9-rc):
  19577. - Disable support for SSLv3. All versions of OpenSSL in use with Tor
  19578. today support TLS 1.0 or later, so we can safely turn off support
  19579. for this old (and insecure) protocol. Fixes bug 13426.
  19580. o Major bugfixes (openssl bug workaround, also in 0.2.5.9-rc):
  19581. - Avoid crashing when using OpenSSL version 0.9.8zc, 1.0.0o, or
  19582. 1.0.1j, built with the 'no-ssl3' configuration option. Fixes bug
  19583. 13471. This is a workaround for an OpenSSL bug.
  19584. Changes in version 0.2.5.8-rc - 2014-09-22
  19585. Tor 0.2.5.8-rc is the second release candidate for the Tor 0.2.5.x
  19586. series. It fixes a bug that affects consistency and speed when
  19587. connecting to hidden services, and it updates the location of one of
  19588. the directory authorities.
  19589. o Major bugfixes:
  19590. - Clients now send the correct address for their chosen rendezvous
  19591. point when trying to access a hidden service. They used to send
  19592. the wrong address, which would still work some of the time because
  19593. they also sent the identity digest of the rendezvous point, and if
  19594. the hidden service happened to try connecting to the rendezvous
  19595. point from a relay that already had a connection open to it,
  19596. the relay would reuse that connection. Now connections to hidden
  19597. services should be more robust and faster. Also, this bug meant
  19598. that clients were leaking to the hidden service whether they were
  19599. on a little-endian (common) or big-endian (rare) system, which for
  19600. some users might have reduced their anonymity. Fixes bug 13151;
  19601. bugfix on 0.2.1.5-alpha.
  19602. o Directory authority changes:
  19603. - Change IP address for gabelmoo (v3 directory authority).
  19604. Changes in version 0.2.4.24 - 2014-09-22
  19605. Tor 0.2.4.24 fixes a bug that affects consistency and speed when
  19606. connecting to hidden services, and it updates the location of one of
  19607. the directory authorities.
  19608. o Major bugfixes:
  19609. - Clients now send the correct address for their chosen rendezvous
  19610. point when trying to access a hidden service. They used to send
  19611. the wrong address, which would still work some of the time because
  19612. they also sent the identity digest of the rendezvous point, and if
  19613. the hidden service happened to try connecting to the rendezvous
  19614. point from a relay that already had a connection open to it,
  19615. the relay would reuse that connection. Now connections to hidden
  19616. services should be more robust and faster. Also, this bug meant
  19617. that clients were leaking to the hidden service whether they were
  19618. on a little-endian (common) or big-endian (rare) system, which for
  19619. some users might have reduced their anonymity. Fixes bug 13151;
  19620. bugfix on 0.2.1.5-alpha.
  19621. o Directory authority changes:
  19622. - Change IP address for gabelmoo (v3 directory authority).
  19623. o Minor features (geoip):
  19624. - Update geoip and geoip6 to the August 7 2014 Maxmind GeoLite2
  19625. Country database.
  19626. Changes in version 0.2.5.7-rc - 2014-09-11
  19627. Tor 0.2.5.7-rc fixes several regressions from earlier in the 0.2.5.x
  19628. release series, and some long-standing bugs related to ORPort reachability
  19629. testing and failure to send CREATE cells. It is the first release
  19630. candidate for the Tor 0.2.5.x series.
  19631. o Major bugfixes (client, startup):
  19632. - Start making circuits as soon as DisabledNetwork is turned off.
  19633. When Tor started with DisabledNetwork set, it would correctly
  19634. conclude that it shouldn't build circuits, but it would mistakenly
  19635. cache this conclusion, and continue believing it even when
  19636. DisableNetwork is set to 0. Fixes the bug introduced by the fix
  19637. for bug 11200; bugfix on 0.2.5.4-alpha.
  19638. - Resume expanding abbreviations for command-line options. The fix
  19639. for bug 4647 accidentally removed our hack from bug 586 that
  19640. rewrote HashedControlPassword to __HashedControlSessionPassword
  19641. when it appears on the commandline (which allowed the user to set
  19642. her own HashedControlPassword in the torrc file while the
  19643. controller generates a fresh session password for each run). Fixes
  19644. bug 12948; bugfix on 0.2.5.1-alpha.
  19645. - Warn about attempts to run hidden services and relays in the same
  19646. process: that's probably not a good idea. Closes ticket 12908.
  19647. o Major bugfixes (relay):
  19648. - Avoid queuing or sending destroy cells for circuit ID zero when we
  19649. fail to send a CREATE cell. Fixes bug 12848; bugfix on 0.0.8pre1.
  19650. Found and fixed by "cypherpunks".
  19651. - Fix ORPort reachability detection on relays running behind a
  19652. proxy, by correctly updating the "local" mark on the controlling
  19653. channel when changing the address of an or_connection_t after the
  19654. handshake. Fixes bug 12160; bugfix on 0.2.4.4-alpha.
  19655. o Minor features (bridge):
  19656. - Add an ExtORPortCookieAuthFileGroupReadable option to make the
  19657. cookie file for the ExtORPort g+r by default.
  19658. o Minor features (geoip):
  19659. - Update geoip and geoip6 to the August 7 2014 Maxmind GeoLite2
  19660. Country database.
  19661. o Minor bugfixes (logging):
  19662. - Reduce the log severity of the "Pluggable transport proxy does not
  19663. provide any needed transports and will not be launched." message,
  19664. since Tor Browser includes several ClientTransportPlugin lines in
  19665. its torrc-defaults file, leading every Tor Browser user who looks
  19666. at her logs to see these notices and wonder if they're dangerous.
  19667. Resolves bug 13124; bugfix on 0.2.5.3-alpha.
  19668. - Downgrade "Unexpected onionskin length after decryption" warning
  19669. to a protocol-warn, since there's nothing relay operators can do
  19670. about a client that sends them a malformed create cell. Resolves
  19671. bug 12996; bugfix on 0.0.6rc1.
  19672. - Log more specific warnings when we get an ESTABLISH_RENDEZVOUS
  19673. cell on a cannibalized or non-OR circuit. Resolves ticket 12997.
  19674. - When logging information about an EXTEND2 or EXTENDED2 cell, log
  19675. their names correctly. Fixes part of bug 12700; bugfix
  19676. on 0.2.4.8-alpha.
  19677. - When logging information about a relay cell whose command we don't
  19678. recognize, log its command as an integer. Fixes part of bug 12700;
  19679. bugfix on 0.2.1.10-alpha.
  19680. - Escape all strings from the directory connection before logging
  19681. them. Fixes bug 13071; bugfix on 0.1.1.15. Patch from "teor".
  19682. o Minor bugfixes (controller):
  19683. - Restore the functionality of CookieAuthFileGroupReadable. Fixes
  19684. bug 12864; bugfix on 0.2.5.1-alpha.
  19685. - Actually send TRANSPORT_LAUNCHED and HS_DESC events to
  19686. controllers. Fixes bug 13085; bugfix on 0.2.5.1-alpha. Patch
  19687. by "teor".
  19688. o Minor bugfixes (compilation):
  19689. - Fix compilation of test.h with MSVC. Patch from Gisle Vanem;
  19690. bugfix on 0.2.5.5-alpha.
  19691. - Make the nmake make files work again. Fixes bug 13081. Bugfix on
  19692. 0.2.5.1-alpha. Patch from "NewEraCracker".
  19693. - In routerlist_assert_ok(), don't take the address of a
  19694. routerinfo's cache_info member unless that routerinfo is non-NULL.
  19695. Fixes bug 13096; bugfix on 0.1.1.9-alpha. Patch by "teor".
  19696. - Fix a large number of false positive warnings from the clang
  19697. analyzer static analysis tool. This should make real warnings
  19698. easier for clang analyzer to find. Patch from "teor". Closes
  19699. ticket 13036.
  19700. o Distribution (systemd):
  19701. - Verify configuration file via ExecStartPre in the systemd unit
  19702. file. Patch from intrigeri; resolves ticket 12730.
  19703. - Explicitly disable RunAsDaemon in the systemd unit file. Our
  19704. current systemd unit uses "Type = simple", so systemd does not
  19705. expect tor to fork. If the user has "RunAsDaemon 1" in their
  19706. torrc, then things won't work as expected. This is e.g. the case
  19707. on Debian (and derivatives), since there we pass "--defaults-torrc
  19708. /usr/share/tor/tor-service-defaults-torrc" (that contains
  19709. "RunAsDaemon 1") by default. Patch by intrigeri; resolves
  19710. ticket 12731.
  19711. o Documentation:
  19712. - Adjust the URLs in the README to refer to the new locations of
  19713. several documents on the website. Fixes bug 12830. Patch from
  19714. Matt Pagan.
  19715. - Document 'reject6' and 'accept6' ExitPolicy entries. Resolves
  19716. ticket 12878.
  19717. Changes in version 0.2.5.6-alpha - 2014-07-28
  19718. Tor 0.2.5.6-alpha brings us a big step closer to slowing down the
  19719. risk from guard rotation, and fixes a variety of other issues to get
  19720. us closer to a release candidate.
  19721. o Major features (also in 0.2.4.23):
  19722. - Make the number of entry guards configurable via a new
  19723. NumEntryGuards consensus parameter, and the number of directory
  19724. guards configurable via a new NumDirectoryGuards consensus
  19725. parameter. Implements ticket 12688.
  19726. o Major bugfixes (also in 0.2.4.23):
  19727. - Fix a bug in the bounds-checking in the 32-bit curve25519-donna
  19728. implementation that caused incorrect results on 32-bit
  19729. implementations when certain malformed inputs were used along with
  19730. a small class of private ntor keys. This bug does not currently
  19731. appear to allow an attacker to learn private keys or impersonate a
  19732. Tor server, but it could provide a means to distinguish 32-bit Tor
  19733. implementations from 64-bit Tor implementations. Fixes bug 12694;
  19734. bugfix on 0.2.4.8-alpha. Bug found by Robert Ransom; fix from
  19735. Adam Langley.
  19736. o Major bugfixes:
  19737. - Perform circuit cleanup operations even when circuit
  19738. construction operations are disabled (because the network is
  19739. disabled, or because there isn't enough directory information).
  19740. Previously, when we were not building predictive circuits, we
  19741. were not closing expired circuits either. Fixes bug 8387; bugfix on
  19742. 0.1.1.11-alpha. This bug became visible in 0.2.4.10-alpha when we
  19743. became more strict about when we have "enough directory information
  19744. to build circuits".
  19745. o Minor features:
  19746. - Authorities now assign the Guard flag to the fastest 25% of the
  19747. network (it used to be the fastest 50%). Also raise the consensus
  19748. weight that guarantees the Guard flag from 250 to 2000. For the
  19749. current network, this results in about 1100 guards, down from 2500.
  19750. This step paves the way for moving the number of entry guards
  19751. down to 1 (proposal 236) while still providing reasonable expected
  19752. performance for most users. Implements ticket 12690.
  19753. - Update geoip and geoip6 to the July 10 2014 Maxmind GeoLite2
  19754. Country database.
  19755. - Slightly enhance the diagnostic message for bug 12184.
  19756. o Minor bugfixes (also in 0.2.4.23):
  19757. - Warn and drop the circuit if we receive an inbound 'relay early'
  19758. cell. Those used to be normal to receive on hidden service circuits
  19759. due to bug 1038, but the buggy Tor versions are long gone from
  19760. the network so we can afford to resume watching for them. Resolves
  19761. the rest of bug 1038; bugfix on 0.2.1.19.
  19762. - Correct a confusing error message when trying to extend a circuit
  19763. via the control protocol but we don't know a descriptor or
  19764. microdescriptor for one of the specified relays. Fixes bug 12718;
  19765. bugfix on 0.2.3.1-alpha.
  19766. o Minor bugfixes:
  19767. - Fix compilation when building with bufferevents enabled. (This
  19768. configuration is still not expected to work, however.)
  19769. Fixes bugs 12438, 12474, 11578; bugfixes on 0.2.5.1-alpha and
  19770. 0.2.5.3-alpha. Patches from Anthony G. Basile and Sathyanarayanan
  19771. Gunasekaran.
  19772. - Compile correctly with builds and forks of OpenSSL (such as
  19773. LibreSSL) that disable compression. Fixes bug 12602; bugfix on
  19774. 0.2.1.1-alpha. Patch from "dhill".
  19775. Changes in version 0.2.4.23 - 2014-07-28
  19776. Tor 0.2.4.23 brings us a big step closer to slowing down the risk from
  19777. guard rotation, and also backports several important fixes from the
  19778. Tor 0.2.5 alpha release series.
  19779. o Major features:
  19780. - Clients now look at the "usecreatefast" consensus parameter to
  19781. decide whether to use CREATE_FAST or CREATE cells for the first hop
  19782. of their circuit. This approach can improve security on connections
  19783. where Tor's circuit handshake is stronger than the available TLS
  19784. connection security levels, but the tradeoff is more computational
  19785. load on guard relays. Implements proposal 221. Resolves ticket 9386.
  19786. - Make the number of entry guards configurable via a new
  19787. NumEntryGuards consensus parameter, and the number of directory
  19788. guards configurable via a new NumDirectoryGuards consensus
  19789. parameter. Implements ticket 12688.
  19790. o Major bugfixes:
  19791. - Fix a bug in the bounds-checking in the 32-bit curve25519-donna
  19792. implementation that caused incorrect results on 32-bit
  19793. implementations when certain malformed inputs were used along with
  19794. a small class of private ntor keys. This bug does not currently
  19795. appear to allow an attacker to learn private keys or impersonate a
  19796. Tor server, but it could provide a means to distinguish 32-bit Tor
  19797. implementations from 64-bit Tor implementations. Fixes bug 12694;
  19798. bugfix on 0.2.4.8-alpha. Bug found by Robert Ransom; fix from
  19799. Adam Langley.
  19800. o Minor bugfixes:
  19801. - Warn and drop the circuit if we receive an inbound 'relay early'
  19802. cell. Those used to be normal to receive on hidden service circuits
  19803. due to bug 1038, but the buggy Tor versions are long gone from
  19804. the network so we can afford to resume watching for them. Resolves
  19805. the rest of bug 1038; bugfix on 0.2.1.19.
  19806. - Correct a confusing error message when trying to extend a circuit
  19807. via the control protocol but we don't know a descriptor or
  19808. microdescriptor for one of the specified relays. Fixes bug 12718;
  19809. bugfix on 0.2.3.1-alpha.
  19810. - Avoid an illegal read from stack when initializing the TLS
  19811. module using a version of OpenSSL without all of the ciphers
  19812. used by the v2 link handshake. Fixes bug 12227; bugfix on
  19813. 0.2.4.8-alpha. Found by "starlight".
  19814. o Minor features:
  19815. - Update geoip and geoip6 to the July 10 2014 Maxmind GeoLite2
  19816. Country database.
  19817. Changes in version 0.2.5.5-alpha - 2014-06-18
  19818. Tor 0.2.5.5-alpha fixes a wide variety of remaining issues in the Tor
  19819. 0.2.5.x release series, including a couple of DoS issues, some
  19820. performance regressions, a large number of bugs affecting the Linux
  19821. seccomp2 sandbox code, and various other bugfixes. It also adds
  19822. diagnostic bugfixes for a few tricky issues that we're trying to
  19823. track down.
  19824. o Major features (security, traffic analysis resistance):
  19825. - Several major improvements to the algorithm used to decide when to
  19826. close TLS connections. Previous versions of Tor closed connections
  19827. at a fixed interval after the last time a non-padding cell was
  19828. sent over the connection, regardless of the target of the
  19829. connection. Now, we randomize the intervals by adding up to 50% of
  19830. their base value, we measure the length of time since connection
  19831. last had at least one circuit, and we allow connections to known
  19832. ORs to remain open a little longer (15 minutes instead of 3
  19833. minutes minimum). These changes should improve Tor's resistance
  19834. against some kinds of traffic analysis, and lower some overhead
  19835. from needlessly closed connections. Fixes ticket 6799.
  19836. Incidentally fixes ticket 12023; bugfix on 0.2.5.1-alpha.
  19837. o Major bugfixes (security, OOM, new since 0.2.5.4-alpha, also in 0.2.4.22):
  19838. - Fix a memory leak that could occur if a microdescriptor parse
  19839. fails during the tokenizing step. This bug could enable a memory
  19840. exhaustion attack by directory servers. Fixes bug 11649; bugfix
  19841. on 0.2.2.6-alpha.
  19842. o Major bugfixes (security, directory authorities):
  19843. - Directory authorities now include a digest of each relay's
  19844. identity key as a part of its microdescriptor.
  19845. This is a workaround for bug 11743 (reported by "cypherpunks"),
  19846. where Tor clients do not support receiving multiple
  19847. microdescriptors with the same SHA256 digest in the same
  19848. consensus. When clients receive a consensus like this, they only
  19849. use one of the relays. Without this fix, a hostile relay could
  19850. selectively disable some client use of target relays by
  19851. constructing a router descriptor with a different identity and the
  19852. same microdescriptor parameters and getting the authorities to
  19853. list it in a microdescriptor consensus. This fix prevents an
  19854. attacker from causing a microdescriptor collision, because the
  19855. router's identity is not forgeable.
  19856. o Major bugfixes (relay):
  19857. - Use a direct dirport connection when uploading non-anonymous
  19858. descriptors to the directory authorities. Previously, relays would
  19859. incorrectly use tunnel connections under a fairly wide variety of
  19860. circumstances. Fixes bug 11469; bugfix on 0.2.4.3-alpha.
  19861. - When a circuit accidentally has the same circuit ID for its
  19862. forward and reverse direction, correctly detect the direction of
  19863. cells using that circuit. Previously, this bug made roughly one
  19864. circuit in a million non-functional. Fixes bug 12195; this is a
  19865. bugfix on every version of Tor.
  19866. o Major bugfixes (client, pluggable transports):
  19867. - When managing pluggable transports, use OS notification facilities
  19868. to learn if they have crashed, and don't attempt to kill any
  19869. process that has already exited. Fixes bug 8746; bugfix
  19870. on 0.2.3.6-alpha.
  19871. o Minor features (diagnostic):
  19872. - When logging a warning because of bug 7164, additionally check the
  19873. hash table for consistency (as proposed on ticket 11737). This may
  19874. help diagnose bug 7164.
  19875. - When we log a heartbeat, log how many one-hop circuits we have
  19876. that are at least 30 minutes old, and log status information about
  19877. a few of them. This is an attempt to track down bug 8387.
  19878. - When encountering an unexpected CR while writing text to a file on
  19879. Windows, log the name of the file. Should help diagnosing
  19880. bug 11233.
  19881. - Give more specific warnings when a client notices that an onion
  19882. handshake has failed. Fixes ticket 9635.
  19883. - Add significant new logging code to attempt to diagnose bug 12184,
  19884. where relays seem to run out of available circuit IDs.
  19885. - Improve the diagnostic log message for bug 8387 even further to
  19886. try to improve our odds of figuring out why one-hop directory
  19887. circuits sometimes do not get closed.
  19888. o Minor features (security, memory management):
  19889. - Memory allocation tricks (mempools and buffer freelists) are now
  19890. disabled by default. You can turn them back on with
  19891. --enable-mempools and --enable-buf-freelists respectively. We're
  19892. disabling these features because malloc performance is good enough
  19893. on most platforms, and a similar feature in OpenSSL exacerbated
  19894. exploitation of the Heartbleed attack. Resolves ticket 11476.
  19895. o Minor features (security):
  19896. - Apply the secure SipHash-2-4 function to the hash table mapping
  19897. circuit IDs and channels to circuits. We missed this one when we
  19898. were converting all the other hash functions to use SipHash back
  19899. in 0.2.5.3-alpha. Resolves ticket 11750.
  19900. o Minor features (build):
  19901. - The configure script has a --disable-seccomp option to turn off
  19902. support for libseccomp on systems that have it, in case it (or
  19903. Tor's use of it) is broken. Resolves ticket 11628.
  19904. o Minor features (other):
  19905. - Update geoip and geoip6 to the June 4 2014 Maxmind GeoLite2
  19906. Country database.
  19907. o Minor bugfixes (security, new since 0.2.5.4-alpha, also in 0.2.4.22):
  19908. - When running a hidden service, do not allow TunneledDirConns 0;
  19909. this will keep the hidden service from running, and also
  19910. make it publish its descriptors directly over HTTP. Fixes bug 10849;
  19911. bugfix on 0.2.1.1-alpha.
  19912. o Minor bugfixes (performance):
  19913. - Avoid a bug where every successful connection made us recompute
  19914. the flag telling us whether we have sufficient information to
  19915. build circuits. Previously, we would forget our cached value
  19916. whenever we successfully opened a channel (or marked a router as
  19917. running or not running for any other reason), regardless of
  19918. whether we had previously believed the router to be running. This
  19919. forced us to run an expensive update operation far too often.
  19920. Fixes bug 12170; bugfix on 0.1.2.1-alpha.
  19921. - Avoid using tor_memeq() for checking relay cell integrity. This
  19922. removes a possible performance bottleneck. Fixes part of bug
  19923. 12169; bugfix on 0.2.1.31.
  19924. o Minor bugfixes (compilation):
  19925. - Fix compilation of test_status.c when building with MVSC. Bugfix
  19926. on 0.2.5.4-alpha. Patch from Gisle Vanem.
  19927. - Resolve GCC complaints on OpenBSD about discarding constness in
  19928. TO_{ORIGIN,OR}_CIRCUIT functions. Fixes part of bug 11633; bugfix
  19929. on 0.1.1.23. Patch from Dana Koch.
  19930. - Resolve clang complaints on OpenBSD with -Wshorten-64-to-32 due to
  19931. treatment of long and time_t as comparable types. Fixes part of
  19932. bug 11633. Patch from Dana Koch.
  19933. - Make Tor compile correctly with --disable-buf-freelists. Fixes bug
  19934. 11623; bugfix on 0.2.5.3-alpha.
  19935. - When deciding whether to build the 64-bit curve25519
  19936. implementation, detect platforms where we can compile 128-bit
  19937. arithmetic but cannot link it. Fixes bug 11729; bugfix on
  19938. 0.2.4.8-alpha. Patch from "conradev".
  19939. - Fix compilation when DNS_CACHE_DEBUG is enabled. Fixes bug 11761;
  19940. bugfix on 0.2.3.13-alpha. Found by "cypherpunks".
  19941. - Fix compilation with dmalloc. Fixes bug 11605; bugfix
  19942. on 0.2.4.10-alpha.
  19943. o Minor bugfixes (Directory server):
  19944. - When sending a compressed set of descriptors or microdescriptors,
  19945. make sure to finalize the zlib stream. Previously, we would write
  19946. all the compressed data, but if the last descriptor we wanted to
  19947. send was missing or too old, we would not mark the stream as
  19948. finished. This caused problems for decompression tools. Fixes bug
  19949. 11648; bugfix on 0.1.1.23.
  19950. o Minor bugfixes (Linux seccomp sandbox):
  19951. - Make the seccomp sandbox code compile under ARM Linux. Fixes bug
  19952. 11622; bugfix on 0.2.5.1-alpha.
  19953. - Avoid crashing when re-opening listener ports with the seccomp
  19954. sandbox active. Fixes bug 12115; bugfix on 0.2.5.1-alpha.
  19955. - Avoid crashing with the seccomp sandbox enabled along with
  19956. ConstrainedSockets. Fixes bug 12139; bugfix on 0.2.5.1-alpha.
  19957. - When we receive a SIGHUP with the sandbox enabled, correctly
  19958. support rotating our log files. Fixes bug 12032; bugfix
  19959. on 0.2.5.1-alpha.
  19960. - Avoid crash when running with sandboxing enabled and
  19961. DirReqStatistics not disabled. Fixes bug 12035; bugfix
  19962. on 0.2.5.1-alpha.
  19963. - Fix a "BUG" warning when trying to write bridge-stats files with
  19964. the Linux syscall sandbox filter enabled. Fixes bug 12041; bugfix
  19965. on 0.2.5.1-alpha.
  19966. - Prevent the sandbox from crashing on startup when run with the
  19967. --enable-expensive-hardening configuration option. Fixes bug
  19968. 11477; bugfix on 0.2.5.4-alpha.
  19969. - When running with DirPortFrontPage and sandboxing both enabled,
  19970. reload the DirPortFrontPage correctly when restarting. Fixes bug
  19971. 12028; bugfix on 0.2.5.1-alpha.
  19972. - Don't try to enable the sandbox when using the Tor binary to check
  19973. its configuration, hash a passphrase, or so on. Doing so was
  19974. crashing on startup for some users. Fixes bug 11609; bugfix
  19975. on 0.2.5.1-alpha.
  19976. - Avoid warnings when running with sandboxing and node statistics
  19977. enabled at the same time. Fixes part of 12064; bugfix on
  19978. 0.2.5.1-alpha. Patch from Michael Wolf.
  19979. - Avoid warnings when running with sandboxing enabled at the same
  19980. time as cookie authentication, hidden services, or directory
  19981. authority voting. Fixes part of 12064; bugfix on 0.2.5.1-alpha.
  19982. - Do not allow options that require calls to exec to be enabled
  19983. alongside the seccomp2 sandbox: they will inevitably crash. Fixes
  19984. bug 12043; bugfix on 0.2.5.1-alpha.
  19985. - Handle failures in getpwnam()/getpwuid() when running with the
  19986. User option set and the Linux syscall sandbox enabled. Fixes bug
  19987. 11946; bugfix on 0.2.5.1-alpha.
  19988. - Refactor the getaddrinfo workaround that the seccomp sandbox uses
  19989. to avoid calling getaddrinfo() after installing the sandbox
  19990. filters. Previously, it preloaded a cache with the IPv4 address
  19991. for our hostname, and nothing else. Now, it loads the cache with
  19992. every address that it used to initialize the Tor process. Fixes
  19993. bug 11970; bugfix on 0.2.5.1-alpha.
  19994. o Minor bugfixes (pluggable transports):
  19995. - Enable the ExtORPortCookieAuthFile option, to allow changing the
  19996. default location of the authentication token for the extended OR
  19997. Port as used by sever-side pluggable transports. We had
  19998. implemented this option before, but the code to make it settable
  19999. had been omitted. Fixes bug 11635; bugfix on 0.2.5.1-alpha.
  20000. - Avoid another 60-second delay when starting Tor in a pluggable-
  20001. transport-using configuration when we already have cached
  20002. descriptors for our bridges. Fixes bug 11965; bugfix
  20003. on 0.2.3.6-alpha.
  20004. o Minor bugfixes (client):
  20005. - Avoid "Tried to open a socket with DisableNetwork set" warnings
  20006. when starting a client with bridges configured and DisableNetwork
  20007. set. (Tor launcher starts Tor with DisableNetwork set the first
  20008. time it runs.) Fixes bug 10405; bugfix on 0.2.3.9-alpha.
  20009. o Minor bugfixes (testing):
  20010. - The Python parts of the test scripts now work on Python 3 as well
  20011. as Python 2, so systems where '/usr/bin/python' is Python 3 will
  20012. no longer have the tests break. Fixes bug 11608; bugfix
  20013. on 0.2.5.2-alpha.
  20014. - When looking for versions of python that we could run the tests
  20015. with, check for "python2.7" and "python3.3"; previously we were
  20016. only looking for "python", "python2", and "python3". Patch from
  20017. Dana Koch. Fixes bug 11632; bugfix on 0.2.5.2-alpha.
  20018. - Fix all valgrind warnings produced by the unit tests. There were
  20019. over a thousand memory leak warnings previously, mostly produced
  20020. by forgetting to free things in the unit test code. Fixes bug
  20021. 11618, bugfixes on many versions of Tor.
  20022. o Minor bugfixes (tor-fw-helper):
  20023. - Give a correct log message when tor-fw-helper fails to launch.
  20024. (Previously, we would say something like "tor-fw-helper sent us a
  20025. string we could not parse".) Fixes bug 9781; bugfix
  20026. on 0.2.4.2-alpha.
  20027. o Minor bugfixes (relay, threading):
  20028. - Check return code on spawn_func() in cpuworker code, so that we
  20029. don't think we've spawned a nonworking cpuworker and write junk to
  20030. it forever. Fix related to bug 4345; bugfix on all released Tor
  20031. versions. Found by "skruffy".
  20032. - Use a pthread_attr to make sure that spawn_func() cannot return an
  20033. error while at the same time launching a thread. Fix related to
  20034. bug 4345; bugfix on all released Tor versions. Reported
  20035. by "cypherpunks".
  20036. o Minor bugfixes (relay, oom prevention):
  20037. - Correctly detect the total available system memory. We tried to do
  20038. this in 0.2.5.4-alpha, but the code was set up to always return an
  20039. error value, even on success. Fixes bug 11805; bugfix
  20040. on 0.2.5.4-alpha.
  20041. o Minor bugfixes (relay, other):
  20042. - We now drop CREATE cells for already-existent circuit IDs and for
  20043. zero-valued circuit IDs, regardless of other factors that might
  20044. otherwise have called for DESTROY cells. Fixes bug 12191; bugfix
  20045. on 0.0.8pre1.
  20046. - Avoid an illegal read from stack when initializing the TLS module
  20047. using a version of OpenSSL without all of the ciphers used by the
  20048. v2 link handshake. Fixes bug 12227; bugfix on 0.2.4.8-alpha. Found
  20049. by "starlight".
  20050. - When rejecting DATA cells for stream_id zero, still count them
  20051. against the circuit's deliver window so that we don't fail to send
  20052. a SENDME. Fixes bug 11246; bugfix on 0.2.4.10-alpha.
  20053. o Minor bugfixes (logging):
  20054. - Fix a misformatted log message about delayed directory fetches.
  20055. Fixes bug 11654; bugfix on 0.2.5.3-alpha.
  20056. - Squelch a spurious LD_BUG message "No origin circuit for
  20057. successful SOCKS stream" in certain hidden service failure cases;
  20058. fixes bug 10616.
  20059. o Distribution:
  20060. - Include a tor.service file in contrib/dist for use with systemd.
  20061. Some distributions will be able to use this file unmodified;
  20062. others will need to tweak it, or write their own. Patch from Jamie
  20063. Nguyen; resolves ticket 8368.
  20064. o Documentation:
  20065. - Clean up several option names in the manpage to match their real
  20066. names, add the missing documentation for a couple of testing and
  20067. directory authority options, remove the documentation for a
  20068. V2-directory fetching option that no longer exists. Resolves
  20069. ticket 11634.
  20070. - Correct the documentation so that it lists the correct directory
  20071. for the stats files. (They are in a subdirectory called "stats",
  20072. not "status".)
  20073. - In the manpage, move more authority-only options into the
  20074. directory authority section so that operators of regular directory
  20075. caches don't get confused.
  20076. o Package cleanup:
  20077. - The contrib directory has been sorted and tidied. Before, it was
  20078. an unsorted dumping ground for useful and not-so-useful things.
  20079. Now, it is divided based on functionality, and the items which
  20080. seemed to be nonfunctional or useless have been removed. Resolves
  20081. ticket 8966; based on patches from "rl1987".
  20082. o Removed code:
  20083. - Remove /tor/dbg-stability.txt URL that was meant to help debug WFU
  20084. and MTBF calculations, but that nobody was using. Fixes ticket 11742.
  20085. - The TunnelDirConns and PreferTunnelledDirConns options no longer
  20086. exist; tunneled directory connections have been available since
  20087. 0.1.2.5-alpha, and turning them off is not a good idea. This is a
  20088. brute-force fix for 10849, where "TunnelDirConns 0" would break
  20089. hidden services.
  20090. Changes in version 0.2.4.22 - 2014-05-16
  20091. Tor 0.2.4.22 backports numerous high-priority fixes from the Tor 0.2.5
  20092. alpha release series. These include blocking all authority signing
  20093. keys that may have been affected by the OpenSSL "heartbleed" bug,
  20094. choosing a far more secure set of TLS ciphersuites by default, closing
  20095. a couple of memory leaks that could be used to run a target relay out
  20096. of RAM, and several others.
  20097. o Major features (security, backport from 0.2.5.4-alpha):
  20098. - Block authority signing keys that were used on authorities
  20099. vulnerable to the "heartbleed" bug in OpenSSL (CVE-2014-0160). (We
  20100. don't have any evidence that these keys _were_ compromised; we're
  20101. doing this to be prudent.) Resolves ticket 11464.
  20102. o Major bugfixes (security, OOM):
  20103. - Fix a memory leak that could occur if a microdescriptor parse
  20104. fails during the tokenizing step. This bug could enable a memory
  20105. exhaustion attack by directory servers. Fixes bug 11649; bugfix
  20106. on 0.2.2.6-alpha.
  20107. o Major bugfixes (TLS cipher selection, backport from 0.2.5.4-alpha):
  20108. - The relay ciphersuite list is now generated automatically based on
  20109. uniform criteria, and includes all OpenSSL ciphersuites with
  20110. acceptable strength and forward secrecy. Previously, we had left
  20111. some perfectly fine ciphersuites unsupported due to omission or
  20112. typo. Resolves bugs 11513, 11492, 11498, 11499. Bugs reported by
  20113. 'cypherpunks'. Bugfix on 0.2.4.8-alpha.
  20114. - Relays now trust themselves to have a better view than clients of
  20115. which TLS ciphersuites are better than others. (Thanks to bug
  20116. 11513, the relay list is now well-considered, whereas the client
  20117. list has been chosen mainly for anti-fingerprinting purposes.)
  20118. Relays prefer: AES over 3DES; then ECDHE over DHE; then GCM over
  20119. CBC; then SHA384 over SHA256 over SHA1; and last, AES256 over
  20120. AES128. Resolves ticket 11528.
  20121. - Clients now try to advertise the same list of ciphersuites as
  20122. Firefox 28. This change enables selection of (fast) GCM
  20123. ciphersuites, disables some strange old ciphers, and stops
  20124. advertising the ECDH (not to be confused with ECDHE) ciphersuites.
  20125. Resolves ticket 11438.
  20126. o Minor bugfixes (configuration, security):
  20127. - When running a hidden service, do not allow TunneledDirConns 0:
  20128. trying to set that option together with a hidden service would
  20129. otherwise prevent the hidden service from running, and also make
  20130. it publish its descriptors directly over HTTP. Fixes bug 10849;
  20131. bugfix on 0.2.1.1-alpha.
  20132. o Minor bugfixes (controller, backport from 0.2.5.4-alpha):
  20133. - Avoid sending a garbage value to the controller when a circuit is
  20134. cannibalized. Fixes bug 11519; bugfix on 0.2.3.11-alpha.
  20135. o Minor bugfixes (exit relay, backport from 0.2.5.4-alpha):
  20136. - Stop leaking memory when we successfully resolve a PTR record.
  20137. Fixes bug 11437; bugfix on 0.2.4.7-alpha.
  20138. o Minor bugfixes (bridge client, backport from 0.2.5.4-alpha):
  20139. - Avoid 60-second delays in the bootstrapping process when Tor is
  20140. launching for a second time while using bridges. Fixes bug 9229;
  20141. bugfix on 0.2.0.3-alpha.
  20142. o Minor bugfixes (relays and bridges, backport from 0.2.5.4-alpha):
  20143. - Give the correct URL in the warning message when trying to run a
  20144. relay on an ancient version of Windows. Fixes bug 9393.
  20145. o Minor bugfixes (compilation):
  20146. - Fix a compilation error when compiling with --disable-curve25519.
  20147. Fixes bug 9700; bugfix on 0.2.4.17-rc.
  20148. o Minor bugfixes:
  20149. - Downgrade the warning severity for the the "md was still
  20150. referenced 1 node(s)" warning. Tor 0.2.5.4-alpha has better code
  20151. for trying to diagnose this bug, and the current warning in
  20152. earlier versions of tor achieves nothing useful. Addresses warning
  20153. from bug 7164.
  20154. o Minor features (log verbosity, backport from 0.2.5.4-alpha):
  20155. - When we run out of usable circuit IDs on a channel, log only one
  20156. warning for the whole channel, and describe how many circuits
  20157. there were on the channel. Fixes part of ticket 11553.
  20158. o Minor features (security, backport from 0.2.5.4-alpha):
  20159. - Decrease the lower limit of MaxMemInCellQueues to 256 MBytes (but
  20160. leave the default at 8GBytes), to better support Raspberry Pi
  20161. users. Fixes bug 9686; bugfix on 0.2.4.14-alpha.
  20162. o Documentation (backport from 0.2.5.4-alpha):
  20163. - Correctly document that we search for a system torrc file before
  20164. looking in ~/.torrc. Fixes documentation side of 9213; bugfix on
  20165. 0.2.3.18-rc.
  20166. Changes in version 0.2.5.4-alpha - 2014-04-25
  20167. Tor 0.2.5.4-alpha includes several security and performance
  20168. improvements for clients and relays, including blacklisting authority
  20169. signing keys that were used while susceptible to the OpenSSL
  20170. "heartbleed" bug, fixing two expensive functions on busy relays,
  20171. improved TLS ciphersuite preference lists, support for run-time
  20172. hardening on compilers that support AddressSanitizer, and more work on
  20173. the Linux sandbox code.
  20174. There are also several usability fixes for clients (especially clients
  20175. that use bridges), two new TransPort protocols supported (one on
  20176. OpenBSD, one on FreeBSD), and various other bugfixes.
  20177. This release marks end-of-life for Tor 0.2.2.x; those Tor versions
  20178. have accumulated many known flaws; everyone should upgrade.
  20179. o Major features (security):
  20180. - If you don't specify MaxMemInQueues yourself, Tor now tries to
  20181. pick a good value based on your total system memory. Previously,
  20182. the default was always 8 GB. You can still override the default by
  20183. setting MaxMemInQueues yourself. Resolves ticket 11396.
  20184. - Block authority signing keys that were used on authorities
  20185. vulnerable to the "heartbleed" bug in OpenSSL (CVE-2014-0160). (We
  20186. don't have any evidence that these keys _were_ compromised; we're
  20187. doing this to be prudent.) Resolves ticket 11464.
  20188. o Major features (relay performance):
  20189. - Speed up server-side lookups of rendezvous and introduction point
  20190. circuits by using hashtables instead of linear searches. These
  20191. functions previously accounted between 3 and 7% of CPU usage on
  20192. some busy relays. Resolves ticket 9841.
  20193. - Avoid wasting CPU when extending a circuit over a channel that is
  20194. nearly out of circuit IDs. Previously, we would do a linear scan
  20195. over possible circuit IDs before finding one or deciding that we
  20196. had exhausted our possibilities. Now, we try at most 64 random
  20197. circuit IDs before deciding that we probably won't succeed. Fixes
  20198. a possible root cause of ticket 11553.
  20199. o Major features (seccomp2 sandbox, Linux only):
  20200. - The seccomp2 sandbox can now run a test network for multiple hours
  20201. without crashing. The sandbox is still experimental, and more bugs
  20202. will probably turn up. To try it, enable "Sandbox 1" on a Linux
  20203. host. Resolves ticket 11351.
  20204. - Strengthen sandbox code: the sandbox can now test the arguments
  20205. for rename(), and blocks _sysctl() entirely. Resolves another part
  20206. of ticket 11351.
  20207. - When the sandbox blocks a system call, it now tries to log a stack
  20208. trace before exiting. Resolves ticket 11465.
  20209. o Major bugfixes (TLS cipher selection):
  20210. - The relay ciphersuite list is now generated automatically based on
  20211. uniform criteria, and includes all OpenSSL ciphersuites with
  20212. acceptable strength and forward secrecy. Previously, we had left
  20213. some perfectly fine ciphersuites unsupported due to omission or
  20214. typo. Resolves bugs 11513, 11492, 11498, 11499. Bugs reported by
  20215. 'cypherpunks'. Bugfix on 0.2.4.8-alpha.
  20216. - Relays now trust themselves to have a better view than clients of
  20217. which TLS ciphersuites are better than others. (Thanks to bug
  20218. 11513, the relay list is now well-considered, whereas the client
  20219. list has been chosen mainly for anti-fingerprinting purposes.)
  20220. Relays prefer: AES over 3DES; then ECDHE over DHE; then GCM over
  20221. CBC; then SHA384 over SHA256 over SHA1; and last, AES256 over
  20222. AES128. Resolves ticket 11528.
  20223. - Clients now try to advertise the same list of ciphersuites as
  20224. Firefox 28. This change enables selection of (fast) GCM
  20225. ciphersuites, disables some strange old ciphers, and stops
  20226. advertising the ECDH (not to be confused with ECDHE) ciphersuites.
  20227. Resolves ticket 11438.
  20228. o Major bugfixes (bridge client):
  20229. - Avoid 60-second delays in the bootstrapping process when Tor is
  20230. launching for a second time while using bridges. Fixes bug 9229;
  20231. bugfix on 0.2.0.3-alpha.
  20232. o Minor features (transparent proxy, *BSD):
  20233. - Support FreeBSD's ipfw firewall interface for TransPort ports on
  20234. FreeBSD. To enable it, set "TransProxyType ipfw". Resolves ticket
  20235. 10267; patch from "yurivict".
  20236. - Support OpenBSD's divert-to rules with the pf firewall for
  20237. transparent proxy ports. To enable it, set "TransProxyType
  20238. pf-divert". This allows Tor to run a TransPort transparent proxy
  20239. port on OpenBSD 4.4 or later without root privileges. See the
  20240. pf.conf(5) manual page for information on configuring pf to use
  20241. divert-to rules. Closes ticket 10896; patch from Dana Koch.
  20242. o Minor features (security):
  20243. - New --enable-expensive-hardening option to enable security
  20244. hardening options that consume nontrivial amounts of CPU and
  20245. memory. Right now, this includes AddressSanitizer and UbSan, which
  20246. are supported in newer versions of GCC and Clang. Closes ticket
  20247. 11477.
  20248. o Minor features (log verbosity):
  20249. - Demote the message that we give when a flushing connection times
  20250. out for too long from NOTICE to INFO. It was usually meaningless.
  20251. Resolves ticket 5286.
  20252. - Don't log so many notice-level bootstrapping messages at startup
  20253. about downloading descriptors. Previously, we'd log a notice
  20254. whenever we learned about more routers. Now, we only log a notice
  20255. at every 5% of progress. Fixes bug 9963.
  20256. - Warn less verbosely when receiving a malformed
  20257. ESTABLISH_RENDEZVOUS cell. Fixes ticket 11279.
  20258. - When we run out of usable circuit IDs on a channel, log only one
  20259. warning for the whole channel, and describe how many circuits
  20260. there were on the channel. Fixes part of ticket 11553.
  20261. o Minor features (relay):
  20262. - If a circuit timed out for at least 3 minutes, check if we have a
  20263. new external IP address, and publish a new descriptor with the new
  20264. IP address if it changed. Resolves ticket 2454.
  20265. o Minor features (controller):
  20266. - Make the entire exit policy available from the control port via
  20267. GETINFO exit-policy/*. Implements enhancement 7952. Patch from
  20268. "rl1987".
  20269. - Because of the fix for ticket 11396, the real limit for memory
  20270. usage may no longer match the configured MaxMemInQueues value. The
  20271. real limit is now exposed via GETINFO limits/max-mem-in-queues.
  20272. o Minor features (bridge client):
  20273. - Report a more useful failure message when we can't connect to a
  20274. bridge because we don't have the right pluggable transport
  20275. configured. Resolves ticket 9665. Patch from Fábio J. Bertinatto.
  20276. o Minor features (diagnostic):
  20277. - Add more log messages to diagnose bug 7164, which causes
  20278. intermittent "microdesc_free() called but md was still referenced"
  20279. warnings. We now include more information, to figure out why we
  20280. might be cleaning a microdescriptor for being too old if it's
  20281. still referenced by a live node_t object.
  20282. o Minor bugfixes (client, DNSPort):
  20283. - When using DNSPort, try to respond to AAAA requests with AAAA
  20284. answers. Previously, we hadn't looked at the request type when
  20285. deciding which answer type to prefer. Fixes bug 10468; bugfix on
  20286. 0.2.4.7-alpha.
  20287. - When receiving a DNS query for an unsupported record type, reply
  20288. with no answer rather than with a NOTIMPL error. This behavior
  20289. isn't correct either, but it will break fewer client programs, we
  20290. hope. Fixes bug 10268; bugfix on 0.2.0.1-alpha. Original patch
  20291. from "epoch".
  20292. o Minor bugfixes (exit relay):
  20293. - Stop leaking memory when we successfully resolve a PTR record.
  20294. Fixes bug 11437; bugfix on 0.2.4.7-alpha.
  20295. o Minor bugfixes (bridge client):
  20296. - Stop accepting bridge lines containing hostnames. Doing so would
  20297. cause clients to perform DNS requests on the hostnames, which was
  20298. not sensible behavior. Fixes bug 10801; bugfix on 0.2.0.1-alpha.
  20299. - Avoid a 60-second delay in the bootstrapping process when a Tor
  20300. client with pluggable transports re-reads its configuration at
  20301. just the wrong time. Re-fixes bug 11156; bugfix on 0.2.5.3-alpha.
  20302. o Minor bugfixes (client, logging during bootstrap):
  20303. - Warn only once if we start logging in an unsafe way. Previously,
  20304. we complain as many times as we had problems. Fixes bug 9870;
  20305. bugfix on 0.2.5.1-alpha.
  20306. - Only report the first fatal bootstrap error on a given OR
  20307. connection. This stops us from telling the controller bogus error
  20308. messages like "DONE". Fixes bug 10431; bugfix on 0.2.1.1-alpha.
  20309. - Be more helpful when trying to run sandboxed on Linux without
  20310. libseccomp. Instead of saying "Sandbox is not implemented on this
  20311. platform", we now explain that we need to be built with
  20312. libseccomp. Fixes bug 11543; bugfix on 0.2.5.1-alpha.
  20313. - Avoid generating spurious warnings when starting with
  20314. DisableNetwork enabled. Fixes bug 11200 and bug 10405; bugfix on
  20315. 0.2.3.9-alpha.
  20316. o Minor bugfixes (closing OR connections):
  20317. - If write_to_buf() in connection_write_to_buf_impl_() ever fails,
  20318. check if it's an or_connection_t and correctly call
  20319. connection_or_close_for_error() rather than
  20320. connection_mark_for_close() directly. Fixes bug 11304; bugfix on
  20321. 0.2.4.4-alpha.
  20322. - When closing all connections on setting DisableNetwork to 1, use
  20323. connection_or_close_normally() rather than closing OR connections
  20324. out from under the channel layer. Fixes bug 11306; bugfix on
  20325. 0.2.4.4-alpha.
  20326. o Minor bugfixes (controller):
  20327. - Avoid sending a garbage value to the controller when a circuit is
  20328. cannibalized. Fixes bug 11519; bugfix on 0.2.3.11-alpha.
  20329. o Minor bugfixes (tor-fw-helper):
  20330. - Allow tor-fw-helper to build again by adding src/ext to its
  20331. CPPFLAGS. Fixes bug 11296; bugfix on 0.2.5.3-alpha.
  20332. o Minor bugfixes (bridges):
  20333. - Avoid potential crashes or bad behavior when launching a
  20334. server-side managed proxy with ORPort or ExtORPort temporarily
  20335. disabled. Fixes bug 9650; bugfix on 0.2.3.16-alpha.
  20336. o Minor bugfixes (platform-specific):
  20337. - Fix compilation on Solaris, which does not have <endian.h>. Fixes
  20338. bug 11426; bugfix on 0.2.5.3-alpha.
  20339. - When dumping a malformed directory object to disk, save it in
  20340. binary mode on Windows, not text mode. Fixes bug 11342; bugfix on
  20341. 0.2.2.1-alpha.
  20342. - Don't report failures from make_socket_reuseable() on incoming
  20343. sockets on OSX: this can happen when incoming connections close
  20344. early. Fixes bug 10081.
  20345. o Minor bugfixes (trivial memory leaks):
  20346. - Fix a small memory leak when signing a directory object. Fixes bug
  20347. 11275; bugfix on 0.2.4.13-alpha.
  20348. - Free placeholder entries in our circuit table at exit; fixes a
  20349. harmless memory leak. Fixes bug 11278; bugfix on 0.2.5.1-alpha.
  20350. - Don't re-initialize a second set of OpenSSL mutexes when starting
  20351. up. Previously, we'd make one set of mutexes, and then immediately
  20352. replace them with another. Fixes bug 11726; bugfix on
  20353. 0.2.5.3-alpha.
  20354. - Resolve some memory leaks found by coverity in the unit tests, on
  20355. exit in tor-gencert, and on a failure to compute digests for our
  20356. own keys when generating a v3 networkstatus vote. These leaks
  20357. should never have affected anyone in practice.
  20358. o Minor bugfixes (hidden service):
  20359. - Only retry attempts to connect to a chosen rendezvous point 8
  20360. times, not 30. Fixes bug 4241; bugfix on 0.1.0.1-rc.
  20361. o Minor bugfixes (misc code correctness):
  20362. - Fix various instances of undefined behavior in channeltls.c,
  20363. tor_memmem(), and eventdns.c that would cause us to construct
  20364. pointers to memory outside an allocated object. (These invalid
  20365. pointers were not accessed, but C does not even allow them to
  20366. exist.) Fixes bug 10363; bugfixes on 0.1.1.1-alpha, 0.1.2.1-alpha,
  20367. 0.2.0.10-alpha, and 0.2.3.6-alpha. Reported by "bobnomnom".
  20368. - Use the AddressSanitizer and Ubsan sanitizers (in clang-3.4) to
  20369. fix some miscellaneous errors in our tests and codebase. Fixes bug
  20370. 11232. Bugfixes on versions back as far as 0.2.1.11-alpha.
  20371. - Always check return values for unlink, munmap, UnmapViewOfFile;
  20372. check strftime return values more often. In some cases all we can
  20373. do is report a warning, but this may help prevent deeper bugs from
  20374. going unnoticed. Closes ticket 8787; bugfixes on many, many tor
  20375. versions.
  20376. - Fix numerous warnings from the clang "scan-build" static analyzer.
  20377. Some of these are programming style issues; some of them are false
  20378. positives that indicated awkward code; some are undefined behavior
  20379. cases related to constructing (but not using) invalid pointers;
  20380. some are assumptions about API behavior; some are (harmlessly)
  20381. logging sizeof(ptr) bytes from a token when sizeof(*ptr) would be
  20382. correct; and one or two are genuine bugs that weren't reachable
  20383. from the rest of the program. Fixes bug 8793; bugfixes on many,
  20384. many tor versions.
  20385. o Documentation:
  20386. - Build the torify.1 manpage again. Previously, we were only trying
  20387. to build it when also building tor-fw-helper. That's why we didn't
  20388. notice that we'd broken the ability to build it. Fixes bug 11321;
  20389. bugfix on 0.2.5.1-alpha.
  20390. - Fix the layout of the SOCKSPort flags in the manpage. Fixes bug
  20391. 11061; bugfix on 0.2.4.7-alpha.
  20392. - Correctly document that we search for a system torrc file before
  20393. looking in ~/.torrc. Fixes documentation side of 9213; bugfix on
  20394. 0.2.3.18-rc.
  20395. - Resolve warnings from Doxygen.
  20396. o Code simplifications and refactoring:
  20397. - Remove is_internal_IP() function. Resolves ticket 4645.
  20398. - Remove unused function circuit_dump_by_chan from circuitlist.c.
  20399. Closes issue 9107; patch from "marek".
  20400. - Change our use of the ENUM_BF macro to avoid declarations that
  20401. confuse Doxygen.
  20402. o Deprecated versions:
  20403. - Tor 0.2.2.x has reached end-of-life; it has received no patches or
  20404. attention for some while. Directory authorities no longer accept
  20405. descriptors from relays running any version of Tor prior to Tor
  20406. 0.2.3.16-alpha. Resolves ticket 11149.
  20407. o Testing:
  20408. - New macros in test.h to simplify writing mock-functions for unit
  20409. tests. Part of ticket 11507. Patch from Dana Koch.
  20410. - Complete tests for the status.c module. Resolves ticket 11507.
  20411. Patch from Dana Koch.
  20412. o Removed code:
  20413. - Remove all code for the long unused v1 directory protocol.
  20414. Resolves ticket 11070.
  20415. Changes in version 0.2.5.3-alpha - 2014-03-22
  20416. Tor 0.2.5.3-alpha includes all the fixes from 0.2.4.21. It contains
  20417. two new anti-DoS features for Tor relays, resolves a bug that kept
  20418. SOCKS5 support for IPv6 from working, fixes several annoying usability
  20419. issues for bridge users, and removes more old code for unused
  20420. directory formats.
  20421. The Tor 0.2.5.x release series is now in patch-freeze: no feature
  20422. patches not already written will be considered for inclusion in 0.2.5.x.
  20423. o Major features (relay security, DoS-resistance):
  20424. - When deciding whether we have run out of memory and we need to
  20425. close circuits, also consider memory allocated in buffers for
  20426. streams attached to each circuit.
  20427. This change, which extends an anti-DoS feature introduced in
  20428. 0.2.4.13-alpha and improved in 0.2.4.14-alpha, lets Tor exit relays
  20429. better resist more memory-based DoS attacks than before. Since the
  20430. MaxMemInCellQueues option now applies to all queues, it is renamed
  20431. to MaxMemInQueues. This feature fixes bug 10169.
  20432. - Avoid hash-flooding denial-of-service attacks by using the secure
  20433. SipHash-2-4 hash function for our hashtables. Without this
  20434. feature, an attacker could degrade performance of a targeted
  20435. client or server by flooding their data structures with a large
  20436. number of entries to be stored at the same hash table position,
  20437. thereby slowing down the Tor instance. With this feature, hash
  20438. table positions are derived from a randomized cryptographic key,
  20439. and an attacker cannot predict which entries will collide. Closes
  20440. ticket 4900.
  20441. - Decrease the lower limit of MaxMemInQueues to 256 MBytes (but leave
  20442. the default at 8GBytes), to better support Raspberry Pi users. Fixes
  20443. bug 9686; bugfix on 0.2.4.14-alpha.
  20444. o Minor features (bridges, pluggable transports):
  20445. - Bridges now write the SHA1 digest of their identity key
  20446. fingerprint (that is, a hash of a hash of their public key) to
  20447. notice-level logs, and to a new hashed-fingerprint file. This
  20448. information will help bridge operators look up their bridge in
  20449. Globe and similar tools. Resolves ticket 10884.
  20450. - Improve the message that Tor displays when running as a bridge
  20451. using pluggable transports without an Extended ORPort listener.
  20452. Also, log the message in the log file too. Resolves ticket 11043.
  20453. o Minor features (other):
  20454. - Add a new option, PredictedPortsRelevanceTime, to control how long
  20455. after having received a request to connect to a given port Tor
  20456. will try to keep circuits ready in anticipation of future requests
  20457. for that port. Patch from "unixninja92"; implements ticket 9176.
  20458. - Generate a warning if any ports are listed in the SocksPolicy,
  20459. DirPolicy, AuthDirReject, AuthDirInvalid, AuthDirBadDir, or
  20460. AuthDirBadExit options. (These options only support address
  20461. ranges.) Fixes part of ticket 11108.
  20462. - Update geoip and geoip6 to the February 7 2014 Maxmind GeoLite2
  20463. Country database.
  20464. o Minor bugfixes (new since 0.2.5.2-alpha, also in 0.2.4.21):
  20465. - Build without warnings under clang 3.4. (We have some macros that
  20466. define static functions only some of which will get used later in
  20467. the module. Starting with clang 3.4, these give a warning unless the
  20468. unused attribute is set on them.) Resolves ticket 10904.
  20469. - Fix build warnings about missing "a2x" comment when building the
  20470. manpages from scratch on OpenBSD; OpenBSD calls it "a2x.py".
  20471. Fixes bug 10929; bugfix on 0.2.2.9-alpha. Patch from Dana Koch.
  20472. o Minor bugfixes (client):
  20473. - Improve the log message when we can't connect to a hidden service
  20474. because all of the hidden service directory nodes hosting its
  20475. descriptor are excluded. Improves on our fix for bug 10722, which
  20476. was a bugfix on 0.2.0.10-alpha.
  20477. - Raise a control port warning when we fail to connect to all of
  20478. our bridges. Previously, we didn't inform the controller, and
  20479. the bootstrap process would stall. Fixes bug 11069; bugfix on
  20480. 0.2.1.2-alpha.
  20481. - Exit immediately when a process-owning controller exits.
  20482. Previously, tor relays would wait for a little while after their
  20483. controller exited, as if they had gotten an INT signal -- but this
  20484. was problematic, since there was no feedback for the user. To do a
  20485. clean shutdown, controllers should send an INT signal and give Tor
  20486. a chance to clean up. Fixes bug 10449; bugfix on 0.2.2.28-beta.
  20487. - Stop attempting to connect to bridges before our pluggable
  20488. transports are configured (harmless but resulted in some erroneous
  20489. log messages). Fixes bug 11156; bugfix on 0.2.3.2-alpha.
  20490. - Fix connections to IPv6 addresses over SOCKS5. Previously, we were
  20491. generating incorrect SOCKS5 responses, and confusing client
  20492. applications. Fixes bug 10987; bugfix on 0.2.4.7-alpha.
  20493. o Minor bugfixes (relays and bridges):
  20494. - Avoid crashing on a malformed resolv.conf file when running a
  20495. relay using Libevent 1. Fixes bug 8788; bugfix on 0.1.1.23.
  20496. - Non-exit relays no longer launch mock DNS requests to check for
  20497. DNS hijacking. This has been unnecessary since 0.2.1.7-alpha, when
  20498. non-exit relays stopped servicing DNS requests. Fixes bug 965;
  20499. bugfix on 0.2.1.7-alpha. Patch from Matt Pagan.
  20500. - Bridges now report complete directory request statistics. Related
  20501. to bug 5824; bugfix on 0.2.2.1-alpha.
  20502. - Bridges now never collect statistics that were designed for
  20503. relays. Fixes bug 5824; bugfix on 0.2.3.8-alpha.
  20504. - Stop giving annoying warning messages when we decide not to launch
  20505. a pluggable transport proxy that we don't need (because there are
  20506. no bridges configured to use it). Resolves ticket 5018; bugfix
  20507. on 0.2.5.2-alpha.
  20508. - Give the correct URL in the warning message when trying to run a
  20509. relay on an ancient version of Windows. Fixes bug 9393.
  20510. o Minor bugfixes (backtrace support):
  20511. - Support automatic backtraces on more platforms by using the
  20512. "-fasynchronous-unwind-tables" compiler option. This option is
  20513. needed for platforms like 32-bit Intel where "-fomit-frame-pointer"
  20514. is on by default and table generation is not. This doesn't yet
  20515. add Windows support; only Linux, OSX, and some BSDs are affected.
  20516. Reported by 'cypherpunks'; fixes bug 11047; bugfix on 0.2.5.2-alpha.
  20517. - Avoid strange behavior if two threads hit failed assertions at the
  20518. same time and both try to log backtraces at once. (Previously, if
  20519. this had happened, both threads would have stored their intermediate
  20520. results in the same buffer, and generated junk outputs.) Reported by
  20521. "cypherpunks". Fixes bug 11048; bugfix on 0.2.5.2-alpha.
  20522. - Fix a compiler warning in format_number_sigsafe(). Bugfix on
  20523. 0.2.5.2-alpha; patch from Nick Hopper.
  20524. o Minor bugfixes (unit tests):
  20525. - Fix a small bug in the unit tests that might have made the tests
  20526. call 'chmod' with an uninitialized bitmask. Fixes bug 10928;
  20527. bugfix on 0.2.5.1-alpha. Patch from Dana Koch.
  20528. o Removed code:
  20529. - Remove all remaining code related to version-0 hidden service
  20530. descriptors: they have not been in use since 0.2.2.1-alpha. Fixes
  20531. the rest of bug 10841.
  20532. o Documentation:
  20533. - Document in the manpage that "KBytes" may also be written as
  20534. "kilobytes" or "KB", that "Kbits" may also be written as
  20535. "kilobits", and so forth. Closes ticket 9222.
  20536. - Document that the ClientOnly config option overrides ORPort.
  20537. Our old explanation made ClientOnly sound as though it did
  20538. nothing at all. Resolves bug 9059.
  20539. - Explain that SocksPolicy, DirPolicy, and similar options don't
  20540. take port arguments. Fixes the other part of ticket 11108.
  20541. - Fix a comment about the rend_server_descriptor_t.protocols field
  20542. to more accurately describe its range. Also, make that field
  20543. unsigned, to more accurately reflect its usage. Fixes bug 9099;
  20544. bugfix on 0.2.1.5-alpha.
  20545. - Fix the manpage's description of HiddenServiceAuthorizeClient:
  20546. the maximum client name length is 16, not 19. Fixes bug 11118;
  20547. bugfix on 0.2.1.6-alpha.
  20548. o Code simplifications and refactoring:
  20549. - Get rid of router->address, since in all cases it was just the
  20550. string representation of router->addr. Resolves ticket 5528.
  20551. o Test infrastructure:
  20552. - Update to the latest version of tinytest.
  20553. - Improve the tinytest implementation of string operation tests so
  20554. that comparisons with NULL strings no longer crash the tests; they
  20555. now just fail, normally. Fixes bug 9004; bugfix on 0.2.2.4-alpha.
  20556. Changes in version 0.2.4.21 - 2014-02-28
  20557. Tor 0.2.4.21 further improves security against potential adversaries who
  20558. find breaking 1024-bit crypto doable, and backports several stability
  20559. and robustness patches from the 0.2.5 branch.
  20560. o Major features (client security):
  20561. - When we choose a path for a 3-hop circuit, make sure it contains
  20562. at least one relay that supports the NTor circuit extension
  20563. handshake. Otherwise, there is a chance that we're building
  20564. a circuit that's worth attacking by an adversary who finds
  20565. breaking 1024-bit crypto doable, and that chance changes the game
  20566. theory. Implements ticket 9777.
  20567. o Major bugfixes:
  20568. - Do not treat streams that fail with reason
  20569. END_STREAM_REASON_INTERNAL as indicating a definite circuit failure,
  20570. since it could also indicate an ENETUNREACH connection error. Fixes
  20571. part of bug 10777; bugfix on 0.2.4.8-alpha.
  20572. o Code simplification and refactoring:
  20573. - Remove data structures which were introduced to implement the
  20574. CellStatistics option: they are now redundant with the new timestamp
  20575. field in the regular packed_cell_t data structure, which we did
  20576. in 0.2.4.18-rc in order to resolve bug 9093. Resolves ticket 10870.
  20577. o Minor features:
  20578. - Always clear OpenSSL bignums before freeing them -- even bignums
  20579. that don't contain secrets. Resolves ticket 10793. Patch by
  20580. Florent Daigniere.
  20581. - Build without warnings under clang 3.4. (We have some macros that
  20582. define static functions only some of which will get used later in
  20583. the module. Starting with clang 3.4, these give a warning unless the
  20584. unused attribute is set on them.) Resolves ticket 10904.
  20585. - Update geoip and geoip6 files to the February 7 2014 Maxmind
  20586. GeoLite2 Country database.
  20587. o Minor bugfixes:
  20588. - Set the listen() backlog limit to the largest actually supported
  20589. on the system, not to the value in a header file. Fixes bug 9716;
  20590. bugfix on every released Tor.
  20591. - Treat ENETUNREACH, EACCES, and EPERM connection failures at an
  20592. exit node as a NOROUTE error, not an INTERNAL error, since they
  20593. can apparently happen when trying to connect to the wrong sort
  20594. of netblocks. Fixes part of bug 10777; bugfix on 0.1.0.1-rc.
  20595. - Fix build warnings about missing "a2x" comment when building the
  20596. manpages from scratch on OpenBSD; OpenBSD calls it "a2x.py".
  20597. Fixes bug 10929; bugfix on 0.2.2.9-alpha. Patch from Dana Koch.
  20598. - Avoid a segfault on SIGUSR1, where we had freed a connection but did
  20599. not entirely remove it from the connection lists. Fixes bug 9602;
  20600. bugfix on 0.2.4.4-alpha.
  20601. - Fix a segmentation fault in our benchmark code when running with
  20602. Fedora's OpenSSL package, or any other OpenSSL that provides
  20603. ECDH but not P224. Fixes bug 10835; bugfix on 0.2.4.8-alpha.
  20604. - Turn "circuit handshake stats since last time" log messages into a
  20605. heartbeat message. Fixes bug 10485; bugfix on 0.2.4.17-rc.
  20606. o Documentation fixes:
  20607. - Document that all but one DirPort entry must have the NoAdvertise
  20608. flag set. Fixes bug 10470; bugfix on 0.2.3.3-alpha / 0.2.3.16-alpha.
  20609. Changes in version 0.2.5.2-alpha - 2014-02-13
  20610. Tor 0.2.5.2-alpha includes all the fixes from 0.2.4.18-rc and 0.2.4.20,
  20611. like the "poor random number generation" fix and the "building too many
  20612. circuits" fix. It also further improves security against potential
  20613. adversaries who find breaking 1024-bit crypto doable, and launches
  20614. pluggable transports on demand (which gets us closer to integrating
  20615. pluggable transport support by default -- not to be confused with Tor
  20616. bundles enabling pluggable transports and bridges by default).
  20617. o Major features (client security):
  20618. - When we choose a path for a 3-hop circuit, make sure it contains
  20619. at least one relay that supports the NTor circuit extension
  20620. handshake. Otherwise, there is a chance that we're building
  20621. a circuit that's worth attacking by an adversary who finds
  20622. breaking 1024-bit crypto doable, and that chance changes the game
  20623. theory. Implements ticket 9777.
  20624. - Clients now look at the "usecreatefast" consensus parameter to
  20625. decide whether to use CREATE_FAST or CREATE cells for the first hop
  20626. of their circuit. This approach can improve security on connections
  20627. where Tor's circuit handshake is stronger than the available TLS
  20628. connection security levels, but the tradeoff is more computational
  20629. load on guard relays. Implements proposal 221. Resolves ticket 9386.
  20630. o Major features (bridges):
  20631. - Don't launch pluggable transport proxies if we don't have any
  20632. bridges configured that would use them. Now we can list many
  20633. pluggable transports, and Tor will dynamically start one when it
  20634. hears a bridge address that needs it. Resolves ticket 5018.
  20635. - The bridge directory authority now assigns status flags (Stable,
  20636. Guard, etc) to bridges based on thresholds calculated over all
  20637. Running bridges. Now bridgedb can finally make use of its features
  20638. to e.g. include at least one Stable bridge in its answers. Fixes
  20639. bug 9859.
  20640. o Major features (other):
  20641. - Extend ORCONN controller event to include an "ID" parameter,
  20642. and add four new controller event types CONN_BW, CIRC_BW,
  20643. CELL_STATS, and TB_EMPTY that show connection and circuit usage.
  20644. The new events are emitted in private Tor networks only, with the
  20645. goal of being able to better track performance and load during
  20646. full-network simulations. Implements proposal 218 and ticket 7359.
  20647. - On some platforms (currently: recent OSX versions, glibc-based
  20648. platforms that support the ELF format, and a few other
  20649. Unix-like operating systems), Tor can now dump stack traces
  20650. when a crash occurs or an assertion fails. By default, traces
  20651. are dumped to stderr (if possible) and to any logs that are
  20652. reporting errors. Implements ticket 9299.
  20653. o Major bugfixes:
  20654. - Avoid a segfault on SIGUSR1, where we had freed a connection but did
  20655. not entirely remove it from the connection lists. Fixes bug 9602;
  20656. bugfix on 0.2.4.4-alpha.
  20657. - Do not treat streams that fail with reason
  20658. END_STREAM_REASON_INTERNAL as indicating a definite circuit failure,
  20659. since it could also indicate an ENETUNREACH connection error. Fixes
  20660. part of bug 10777; bugfix on 0.2.4.8-alpha.
  20661. o Major bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.20):
  20662. - Do not allow OpenSSL engines to replace the PRNG, even when
  20663. HardwareAccel is set. The only default builtin PRNG engine uses
  20664. the Intel RDRAND instruction to replace the entire PRNG, and
  20665. ignores all attempts to seed it with more entropy. That's
  20666. cryptographically stupid: the right response to a new alleged
  20667. entropy source is never to discard all previously used entropy
  20668. sources. Fixes bug 10402; works around behavior introduced in
  20669. OpenSSL 1.0.0. Diagnosis and investigation thanks to "coderman"
  20670. and "rl1987".
  20671. - Fix assertion failure when AutomapHostsOnResolve yields an IPv6
  20672. address. Fixes bug 10465; bugfix on 0.2.4.7-alpha.
  20673. - Avoid launching spurious extra circuits when a stream is pending.
  20674. This fixes a bug where any circuit that _wasn't_ unusable for new
  20675. streams would be treated as if it were, causing extra circuits to
  20676. be launched. Fixes bug 10456; bugfix on 0.2.4.12-alpha.
  20677. o Major bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
  20678. - No longer stop reading or writing on cpuworker connections when
  20679. our rate limiting buckets go empty. Now we should handle circuit
  20680. handshake requests more promptly. Resolves bug 9731.
  20681. - Stop trying to bootstrap all our directory information from
  20682. only our first guard. Discovered while fixing bug 9946; bugfix
  20683. on 0.2.4.8-alpha.
  20684. o Minor features (bridges, pluggable transports):
  20685. - Add threshold cutoffs to the networkstatus document created by
  20686. the Bridge Authority. Fixes bug 1117.
  20687. - On Windows, spawn background processes using the CREATE_NO_WINDOW
  20688. flag. Now Tor Browser Bundle 3.5 with pluggable transports enabled
  20689. doesn't pop up a blank console window. (In Tor Browser Bundle 2.x,
  20690. Vidalia set this option for us.) Implements ticket 10297.
  20691. o Minor features (security):
  20692. - Always clear OpenSSL bignums before freeing them -- even bignums
  20693. that don't contain secrets. Resolves ticket 10793. Patch by
  20694. Florent Daignière.
  20695. o Minor features (config options and command line):
  20696. - Add an --allow-missing-torrc commandline option that tells Tor to
  20697. run even if the configuration file specified by -f is not available.
  20698. Implements ticket 10060.
  20699. - Add support for the TPROXY transparent proxying facility on Linux.
  20700. See documentation for the new TransProxyType option for more
  20701. details. Implementation by "thomo". Closes ticket 10582.
  20702. o Minor features (controller):
  20703. - Add a new "HS_DESC" controller event that reports activities
  20704. related to hidden service descriptors. Resolves ticket 8510.
  20705. - New "DROPGUARDS" controller command to forget all current entry
  20706. guards. Not recommended for ordinary use, since replacing guards
  20707. too frequently makes several attacks easier. Resolves ticket 9934;
  20708. patch from "ra".
  20709. o Minor features (build):
  20710. - Assume that a user using ./configure --host wants to cross-compile,
  20711. and give an error if we cannot find a properly named
  20712. tool-chain. Add a --disable-tool-name-check option to proceed
  20713. nevertheless. Addresses ticket 9869. Patch by Benedikt Gollatz.
  20714. - If we run ./configure and the compiler recognizes -fstack-protector
  20715. but the linker rejects it, warn the user about a potentially missing
  20716. libssp package. Addresses ticket 9948. Patch from Benedikt Gollatz.
  20717. o Minor features (testing):
  20718. - If Python is installed, "make check" now runs extra tests beyond
  20719. the unit test scripts.
  20720. - When bootstrapping a test network, sometimes very few relays get
  20721. the Guard flag. Now a new option "TestingDirAuthVoteGuard" can
  20722. specify a set of relays which should be voted Guard regardless of
  20723. their uptime or bandwidth. Addresses ticket 9206.
  20724. o Minor features (log messages):
  20725. - When ServerTransportPlugin is set on a bridge, Tor can write more
  20726. useful statistics about bridge use in its extrainfo descriptors,
  20727. but only if the Extended ORPort ("ExtORPort") is set too. Add a
  20728. log message to inform the user in this case. Resolves ticket 9651.
  20729. - When receiving a new controller connection, log the origin address.
  20730. Resolves ticket 9698; patch from "sigpipe".
  20731. - When logging OpenSSL engine status at startup, log the status of
  20732. more engines. Fixes ticket 10043; patch from Joshua Datko.
  20733. - Turn "circuit handshake stats since last time" log messages into a
  20734. heartbeat message. Fixes bug 10485; bugfix on 0.2.4.17-rc.
  20735. o Minor features (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
  20736. - Improve the circuit queue out-of-memory handler. Previously, when
  20737. we ran low on memory, we'd close whichever circuits had the most
  20738. queued cells. Now, we close those that have the *oldest* queued
  20739. cells, on the theory that those are most responsible for us
  20740. running low on memory. Based on analysis from a forthcoming paper
  20741. by Jansen, Tschorsch, Johnson, and Scheuermann. Fixes bug 9093.
  20742. - Generate bootstrapping status update events correctly when fetching
  20743. microdescriptors. Fixes bug 9927.
  20744. - Update to the October 2 2013 Maxmind GeoLite Country database.
  20745. o Minor bugfixes (clients):
  20746. - When closing a channel that has already been open, do not close
  20747. pending circuits that were waiting to connect to the same relay.
  20748. Fixes bug 9880; bugfix on 0.2.5.1-alpha. Thanks to skruffy for
  20749. finding this bug.
  20750. o Minor bugfixes (relays):
  20751. - Treat ENETUNREACH, EACCES, and EPERM connection failures at an
  20752. exit node as a NOROUTE error, not an INTERNAL error, since they
  20753. can apparently happen when trying to connect to the wrong sort
  20754. of netblocks. Fixes part of bug 10777; bugfix on 0.1.0.1-rc.
  20755. o Minor bugfixes (bridges):
  20756. - Fix a bug where the first connection works to a bridge that uses a
  20757. pluggable transport with client-side parameters, but we don't send
  20758. the client-side parameters on subsequent connections. (We don't
  20759. use any pluggable transports with client-side parameters yet,
  20760. but ScrambleSuit will soon become the first one.) Fixes bug 9162;
  20761. bugfix on 0.2.0.3-alpha. Based on a patch from "rl1987".
  20762. o Minor bugfixes (node selection):
  20763. - If ExcludeNodes is set, consider non-excluded hidden service
  20764. directory servers before excluded ones. Do not consider excluded
  20765. hidden service directory servers at all if StrictNodes is
  20766. set. (Previously, we would sometimes decide to connect to those
  20767. servers, and then realize before we initiated a connection that
  20768. we had excluded them.) Fixes bug 10722; bugfix on 0.2.0.10-alpha.
  20769. Reported by "mr-4".
  20770. - If we set the ExitNodes option but it doesn't include any nodes
  20771. that have the Exit flag, we would choose not to bootstrap. Now we
  20772. bootstrap so long as ExitNodes includes nodes which can exit to
  20773. some port. Fixes bug 10543; bugfix on 0.2.4.10-alpha.
  20774. o Minor bugfixes (controller and command-line):
  20775. - If changing a config option via "setconf" fails in a recoverable
  20776. way, we used to nonetheless write our new control ports to the
  20777. file described by the "ControlPortWriteToFile" option. Now we only
  20778. write out that file if we successfully switch to the new config
  20779. option. Fixes bug 5605; bugfix on 0.2.2.26-beta. Patch from "Ryman".
  20780. - When a command-line option such as --version or --help that
  20781. ordinarily implies --hush appears on the command line along with
  20782. --quiet, then actually obey --quiet. Previously, we obeyed --quiet
  20783. only if it appeared later on the command line. Fixes bug 9578;
  20784. bugfix on 0.2.5.1-alpha.
  20785. o Minor bugfixes (code correctness):
  20786. - Previously we used two temporary files when writing descriptors to
  20787. disk; now we only use one. Fixes bug 1376.
  20788. - Remove an erroneous (but impossible and thus harmless) pointer
  20789. comparison that would have allowed compilers to skip a bounds
  20790. check in channeltls.c. Fixes bugs 10313 and 9980; bugfix on
  20791. 0.2.0.10-alpha. Noticed by Jared L Wong and David Fifield.
  20792. - Fix an always-true assertion in pluggable transports code so it
  20793. actually checks what it was trying to check. Fixes bug 10046;
  20794. bugfix on 0.2.3.9-alpha. Found by "dcb".
  20795. o Minor bugfixes (protocol correctness):
  20796. - When receiving a VERSIONS cell with an odd number of bytes, close
  20797. the connection immediately since the cell is malformed. Fixes bug
  20798. 10365; bugfix on 0.2.0.10-alpha. Spotted by "bobnomnom"; fix by
  20799. "rl1987".
  20800. o Minor bugfixes (build):
  20801. - Restore the ability to compile Tor with V2_HANDSHAKE_SERVER
  20802. turned off (that is, without support for v2 link handshakes). Fixes
  20803. bug 4677; bugfix on 0.2.3.2-alpha. Patch from "piet".
  20804. - Fix compilation warnings and startup issues when running with
  20805. "Sandbox 1" and libseccomp-2.1.0. Fixes bug 10563; bugfix on
  20806. 0.2.5.1-alpha.
  20807. - Fix compilation on Solaris 9, which didn't like us having an
  20808. identifier named "sun". Fixes bug 10565; bugfix in 0.2.5.1-alpha.
  20809. o Minor bugfixes (testing):
  20810. - Fix a segmentation fault in our benchmark code when running with
  20811. Fedora's OpenSSL package, or any other OpenSSL that provides
  20812. ECDH but not P224. Fixes bug 10835; bugfix on 0.2.4.8-alpha.
  20813. o Minor bugfixes (log messages):
  20814. - Fix a bug where clients using bridges would report themselves
  20815. as 50% bootstrapped even without a live consensus document.
  20816. Fixes bug 9922; bugfix on 0.2.1.1-alpha.
  20817. - Suppress a warning where, if there's only one directory authority
  20818. in the network, we would complain that votes and signatures cannot
  20819. be uploaded to other directory authorities. Fixes bug 10842;
  20820. bugfix on 0.2.2.26-beta.
  20821. - Report bootstrapping progress correctly when we're downloading
  20822. microdescriptors. We had updated our "do we have enough microdescs
  20823. to begin building circuits?" logic most recently in 0.2.4.10-alpha
  20824. (see bug 5956), but we left the bootstrap status event logic at
  20825. "how far through getting 1/4 of them are we?" Fixes bug 9958;
  20826. bugfix on 0.2.2.36, which is where they diverged (see bug 5343).
  20827. o Minor bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.20):
  20828. - Avoid a crash bug when starting with a corrupted microdescriptor
  20829. cache file. Fixes bug 10406; bugfix on 0.2.2.6-alpha.
  20830. - If we fail to dump a previously cached microdescriptor to disk, avoid
  20831. freeing duplicate data later on. Fixes bug 10423; bugfix on
  20832. 0.2.4.13-alpha. Spotted by "bobnomnom".
  20833. o Minor bugfixes on 0.2.4.x (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
  20834. - Correctly log long IPv6 exit policies, instead of truncating them
  20835. or reporting an error. Fixes bug 9596; bugfix on 0.2.4.7-alpha.
  20836. - Our default TLS ecdhe groups were backwards: we meant to be using
  20837. P224 for relays (for performance win) and P256 for bridges (since
  20838. it is more common in the wild). Instead we had it backwards. After
  20839. reconsideration, we decided that the default should be P256 on all
  20840. hosts, since its security is probably better, and since P224 is
  20841. reportedly used quite little in the wild. Found by "skruffy" on
  20842. IRC. Fix for bug 9780; bugfix on 0.2.4.8-alpha.
  20843. - Free directory authority certificate download statuses on exit
  20844. rather than leaking them. Fixes bug 9644; bugfix on 0.2.4.13-alpha.
  20845. o Minor bugfixes on 0.2.3.x (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
  20846. - If the guard we choose first doesn't answer, we would try the
  20847. second guard, but once we connected to the second guard we would
  20848. abandon it and retry the first one, slowing down bootstrapping.
  20849. The fix is to treat all our initially chosen guards as acceptable
  20850. to use. Fixes bug 9946; bugfix on 0.1.1.11-alpha.
  20851. - Fix an assertion failure that would occur when disabling the
  20852. ORPort setting on a running Tor process while accounting was
  20853. enabled. Fixes bug 6979; bugfix on 0.2.2.18-alpha.
  20854. - When examining the list of network interfaces to find our address,
  20855. do not consider non-running or disabled network interfaces. Fixes
  20856. bug 9904; bugfix on 0.2.3.11-alpha. Patch from "hantwister".
  20857. - Avoid an off-by-one error when checking buffer boundaries when
  20858. formatting the exit status of a pluggable transport helper.
  20859. This is probably not an exploitable bug, but better safe than
  20860. sorry. Fixes bug 9928; bugfix on 0.2.3.18-rc. Bug found by
  20861. Pedro Ribeiro.
  20862. o Removed code and features:
  20863. - Clients now reject any directory authority certificates lacking
  20864. a dir-key-crosscert element. These have been included since
  20865. 0.2.1.9-alpha, so there's no real reason for them to be optional
  20866. any longer. Completes proposal 157. Resolves ticket 10162.
  20867. - Remove all code that existed to support the v2 directory system,
  20868. since there are no longer any v2 directory authorities. Resolves
  20869. ticket 10758.
  20870. - Remove the HSAuthoritativeDir and AlternateHSAuthority torrc
  20871. options, which were used for designating authorities as "Hidden
  20872. service authorities". There has been no use of hidden service
  20873. authorities since 0.2.2.1-alpha, when we stopped uploading or
  20874. downloading v0 hidden service descriptors. Fixes bug 10881; also
  20875. part of a fix for bug 10841.
  20876. o Code simplification and refactoring:
  20877. - Remove some old fallback code designed to keep Tor clients working
  20878. in a network with only two working relays. Elsewhere in the code we
  20879. have long since stopped supporting such networks, so there wasn't
  20880. much point in keeping it around. Addresses ticket 9926.
  20881. - Reject 0-length EXTEND2 cells more explicitly. Fixes bug 10536;
  20882. bugfix on 0.2.4.8-alpha. Reported by "cypherpunks".
  20883. - Remove data structures which were introduced to implement the
  20884. CellStatistics option: they are now redundant with the addition
  20885. of a timestamp to the regular packed_cell_t data structure, which
  20886. we did in 0.2.4.18-rc in order to resolve ticket 9093. Implements
  20887. ticket 10870.
  20888. o Documentation (man page) fixes:
  20889. - Update manpage to describe some of the files you can expect to
  20890. find in Tor's DataDirectory. Addresses ticket 9839.
  20891. - Document that all but one DirPort entry must have the NoAdvertise
  20892. flag set. Fixes bug 10470; bugfix on 0.2.3.3-alpha / 0.2.3.16-alpha.
  20893. o Documentation fixes (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
  20894. - Clarify the usage and risks of setting the ContactInfo torrc line
  20895. for your relay or bridge. Resolves ticket 9854.
  20896. - Add anchors to the manpage so we can link to the html version of
  20897. the documentation for specific options. Resolves ticket 9866.
  20898. - Replace remaining references to DirServer in man page and
  20899. log entries. Resolves ticket 10124.
  20900. o Tool changes:
  20901. - Make the "tor-gencert" tool used by directory authority operators
  20902. create 2048-bit signing keys by default (rather than 1024-bit, since
  20903. 1024-bit is uncomfortably small these days). Addresses ticket 10324.
  20904. Changes in version 0.2.4.20 - 2013-12-22
  20905. Tor 0.2.4.20 fixes potentially poor random number generation for users
  20906. who 1) use OpenSSL 1.0.0 or later, 2) set "HardwareAccel 1" in their
  20907. torrc file, 3) have "Sandy Bridge" or "Ivy Bridge" Intel processors,
  20908. and 4) have no state file in their DataDirectory (as would happen on
  20909. first start). Users who generated relay or hidden service identity
  20910. keys in such a situation should discard them and generate new ones.
  20911. This release also fixes a logic error that caused Tor clients to build
  20912. many more preemptive circuits than they actually need.
  20913. o Major bugfixes:
  20914. - Do not allow OpenSSL engines to replace the PRNG, even when
  20915. HardwareAccel is set. The only default builtin PRNG engine uses
  20916. the Intel RDRAND instruction to replace the entire PRNG, and
  20917. ignores all attempts to seed it with more entropy. That's
  20918. cryptographically stupid: the right response to a new alleged
  20919. entropy source is never to discard all previously used entropy
  20920. sources. Fixes bug 10402; works around behavior introduced in
  20921. OpenSSL 1.0.0. Diagnosis and investigation thanks to "coderman"
  20922. and "rl1987".
  20923. - Fix assertion failure when AutomapHostsOnResolve yields an IPv6
  20924. address. Fixes bug 10465; bugfix on 0.2.4.7-alpha.
  20925. - Avoid launching spurious extra circuits when a stream is pending.
  20926. This fixes a bug where any circuit that _wasn't_ unusable for new
  20927. streams would be treated as if it were, causing extra circuits to
  20928. be launched. Fixes bug 10456; bugfix on 0.2.4.12-alpha.
  20929. o Minor bugfixes:
  20930. - Avoid a crash bug when starting with a corrupted microdescriptor
  20931. cache file. Fixes bug 10406; bugfix on 0.2.2.6-alpha.
  20932. - If we fail to dump a previously cached microdescriptor to disk, avoid
  20933. freeing duplicate data later on. Fixes bug 10423; bugfix on
  20934. 0.2.4.13-alpha. Spotted by "bobnomnom".
  20935. Changes in version 0.2.4.19 - 2013-12-11
  20936. The Tor 0.2.4 release series is dedicated to the memory of Aaron Swartz
  20937. (1986-2013). Aaron worked on diverse projects including helping to guide
  20938. Creative Commons, playing a key role in stopping SOPA/PIPA, bringing
  20939. transparency to the U.S government's PACER documents, and contributing
  20940. design and development for Tor and Tor2Web. Aaron was one of the latest
  20941. martyrs in our collective fight for civil liberties and human rights,
  20942. and his death is all the more painful because he was one of us.
  20943. Tor 0.2.4.19, the first stable release in the 0.2.4 branch, features
  20944. a new circuit handshake and link encryption that use ECC to provide
  20945. better security and efficiency; makes relays better manage circuit
  20946. creation requests; uses "directory guards" to reduce client enumeration
  20947. risks; makes bridges collect and report statistics about the pluggable
  20948. transports they support; cleans up and improves our geoip database;
  20949. gets much closer to IPv6 support for clients, bridges, and relays; makes
  20950. directory authorities use measured bandwidths rather than advertised
  20951. ones when computing flags and thresholds; disables client-side DNS
  20952. caching to reduce tracking risks; and fixes a big bug in bridge
  20953. reachability testing. This release introduces two new design
  20954. abstractions in the code: a new "channel" abstraction between circuits
  20955. and or_connections to allow for implementing alternate relay-to-relay
  20956. transports, and a new "circuitmux" abstraction storing the queue of
  20957. circuits for a channel. The release also includes many stability,
  20958. security, and privacy fixes.
  20959. Changes in version 0.2.4.18-rc - 2013-11-16
  20960. Tor 0.2.4.18-rc is the fourth release candidate for the Tor 0.2.4.x
  20961. series. It takes a variety of fixes from the 0.2.5.x branch to improve
  20962. stability, performance, and better handling of edge cases.
  20963. o Major features:
  20964. - Re-enable TLS 1.1 and 1.2 when built with OpenSSL 1.0.1e or later.
  20965. Resolves ticket 6055. (OpenSSL before 1.0.1 didn't have TLS 1.1 or
  20966. 1.2, and OpenSSL from 1.0.1 through 1.0.1d had bugs that prevented
  20967. renegotiation from working with TLS 1.1 or 1.2, so we had disabled
  20968. them to solve bug 6033.)
  20969. o Major bugfixes:
  20970. - No longer stop reading or writing on cpuworker connections when
  20971. our rate limiting buckets go empty. Now we should handle circuit
  20972. handshake requests more promptly. Resolves bug 9731.
  20973. - If we are unable to save a microdescriptor to the journal, do not
  20974. drop it from memory and then reattempt downloading it. Fixes bug
  20975. 9645; bugfix on 0.2.2.6-alpha.
  20976. - Stop trying to bootstrap all our directory information from
  20977. only our first guard. Discovered while fixing bug 9946; bugfix
  20978. on 0.2.4.8-alpha.
  20979. - The new channel code sometimes lost track of in-progress circuits,
  20980. causing long-running clients to stop building new circuits. The
  20981. fix is to always call circuit_n_chan_done(chan, 0) from
  20982. channel_closed(). Fixes bug 9776; bugfix on 0.2.4.17-rc.
  20983. o Minor bugfixes (on 0.2.4.x):
  20984. - Correctly log long IPv6 exit policies, instead of truncating them
  20985. or reporting an error. Fixes bug 9596; bugfix on 0.2.4.7-alpha.
  20986. - Our default TLS ecdhe groups were backwards: we meant to be using
  20987. P224 for relays (for performance win) and P256 for bridges (since
  20988. it is more common in the wild). Instead we had it backwards. After
  20989. reconsideration, we decided that the default should be P256 on all
  20990. hosts, since its security is probably better, and since P224 is
  20991. reportedly used quite little in the wild. Found by "skruffy" on
  20992. IRC. Fix for bug 9780; bugfix on 0.2.4.8-alpha.
  20993. - Free directory authority certificate download statuses on exit
  20994. rather than leaking them. Fixes bug 9644; bugfix on 0.2.4.13-alpha.
  20995. o Minor bugfixes (on 0.2.3.x and earlier):
  20996. - If the guard we choose first doesn't answer, we would try the
  20997. second guard, but once we connected to the second guard we would
  20998. abandon it and retry the first one, slowing down bootstrapping.
  20999. The fix is to treat all our initially chosen guards as acceptable
  21000. to use. Fixes bug 9946; bugfix on 0.1.1.11-alpha.
  21001. - Fix an assertion failure that would occur when disabling the
  21002. ORPort setting on a running Tor process while accounting was
  21003. enabled. Fixes bug 6979; bugfix on 0.2.2.18-alpha.
  21004. - When examining the list of network interfaces to find our address,
  21005. do not consider non-running or disabled network interfaces. Fixes
  21006. bug 9904; bugfix on 0.2.3.11-alpha. Patch from "hantwister".
  21007. - Avoid an off-by-one error when checking buffer boundaries when
  21008. formatting the exit status of a pluggable transport helper.
  21009. This is probably not an exploitable bug, but better safe than
  21010. sorry. Fixes bug 9928; bugfix on 0.2.3.18-rc. Bug found by
  21011. Pedro Ribeiro.
  21012. o Minor features (protecting client timestamps):
  21013. - Clients no longer send timestamps in their NETINFO cells. These were
  21014. not used for anything, and they provided one small way for clients
  21015. to be distinguished from each other as they moved from network to
  21016. network or behind NAT. Implements part of proposal 222.
  21017. - Clients now round timestamps in INTRODUCE cells down to the nearest
  21018. 10 minutes. If a new Support022HiddenServices option is set to 0, or
  21019. if it's set to "auto" and the feature is disabled in the consensus,
  21020. the timestamp is sent as 0 instead. Implements part of proposal 222.
  21021. - Stop sending timestamps in AUTHENTICATE cells. This is not such
  21022. a big deal from a security point of view, but it achieves no actual
  21023. good purpose, and isn't needed. Implements part of proposal 222.
  21024. - Reduce down accuracy of timestamps in hidden service descriptors.
  21025. Implements part of proposal 222.
  21026. o Minor features (other):
  21027. - Improve the circuit queue out-of-memory handler. Previously, when
  21028. we ran low on memory, we'd close whichever circuits had the most
  21029. queued cells. Now, we close those that have the *oldest* queued
  21030. cells, on the theory that those are most responsible for us
  21031. running low on memory. Based on analysis from a forthcoming paper
  21032. by Jansen, Tschorsch, Johnson, and Scheuermann. Fixes bug 9093.
  21033. - Generate bootstrapping status update events correctly when fetching
  21034. microdescriptors. Fixes bug 9927.
  21035. - Update to the October 2 2013 Maxmind GeoLite Country database.
  21036. o Documentation fixes:
  21037. - Clarify the usage and risks of setting the ContactInfo torrc line
  21038. for your relay or bridge. Resolves ticket 9854.
  21039. - Add anchors to the manpage so we can link to the html version of
  21040. the documentation for specific options. Resolves ticket 9866.
  21041. - Replace remaining references to DirServer in man page and
  21042. log entries. Resolves ticket 10124.
  21043. Changes in version 0.2.5.1-alpha - 2013-10-02
  21044. Tor 0.2.5.1-alpha introduces experimental support for syscall sandboxing
  21045. on Linux, allows bridges that offer pluggable transports to report usage
  21046. statistics, fixes many issues to make testing easier, and provides
  21047. a pile of minor features and bugfixes that have been waiting for a
  21048. release of the new branch.
  21049. This is the first alpha release in a new series, so expect there to
  21050. be bugs. Users who would rather test out a more stable branch should
  21051. stay with 0.2.4.x for now.
  21052. o Major features (security):
  21053. - Use the seccomp2 syscall filtering facility on Linux to limit
  21054. which system calls Tor can invoke. This is an experimental,
  21055. Linux-only feature to provide defense-in-depth against unknown
  21056. attacks. To try turning it on, set "Sandbox 1" in your torrc
  21057. file. Please be ready to report bugs. We hope to add support
  21058. for better sandboxing in the future, including more fine-grained
  21059. filters, better division of responsibility, and support for more
  21060. platforms. This work has been done by Cristian-Matei Toader for
  21061. Google Summer of Code.
  21062. - Re-enable TLS 1.1 and 1.2 when built with OpenSSL 1.0.1e or later.
  21063. Resolves ticket 6055. (OpenSSL before 1.0.1 didn't have TLS 1.1 or
  21064. 1.2, and OpenSSL from 1.0.1 through 1.0.1d had bugs that prevented
  21065. renegotiation from working with TLS 1.1 or 1.2, so we had disabled
  21066. them to solve bug 6033.)
  21067. o Major features (other):
  21068. - Add support for passing arguments to managed pluggable transport
  21069. proxies. Implements ticket 3594.
  21070. - Bridges now track GeoIP information and the number of their users
  21071. even when pluggable transports are in use, and report usage
  21072. statistics in their extra-info descriptors. Resolves tickets 4773
  21073. and 5040.
  21074. - Make testing Tor networks bootstrap better: lower directory fetch
  21075. retry schedules and maximum interval without directory requests,
  21076. and raise maximum download tries. Implements ticket 6752.
  21077. - Add make target 'test-network' to run tests on a Chutney network.
  21078. Implements ticket 8530.
  21079. - The ntor handshake is now on-by-default, no matter what the
  21080. directory authorities recommend. Implements ticket 8561.
  21081. o Major bugfixes:
  21082. - Instead of writing destroy cells directly to outgoing connection
  21083. buffers, queue them and intersperse them with other outgoing cells.
  21084. This can prevent a set of resource starvation conditions where too
  21085. many pending destroy cells prevent data cells from actually getting
  21086. delivered. Reported by "oftc_must_be_destroyed". Fixes bug 7912;
  21087. bugfix on 0.2.0.1-alpha.
  21088. - If we are unable to save a microdescriptor to the journal, do not
  21089. drop it from memory and then reattempt downloading it. Fixes bug
  21090. 9645; bugfix on 0.2.2.6-alpha.
  21091. - The new channel code sometimes lost track of in-progress circuits,
  21092. causing long-running clients to stop building new circuits. The
  21093. fix is to always call circuit_n_chan_done(chan, 0) from
  21094. channel_closed(). Fixes bug 9776; bugfix on 0.2.4.17-rc.
  21095. o Build features:
  21096. - Tor now builds each source file in two modes: a mode that avoids
  21097. exposing identifiers needlessly, and another mode that exposes
  21098. more identifiers for testing. This lets the compiler do better at
  21099. optimizing the production code, while enabling us to take more
  21100. radical measures to let the unit tests test things.
  21101. - The production builds no longer include functions used only in
  21102. the unit tests; all functions exposed from a module only for
  21103. unit-testing are now static in production builds.
  21104. - Add an --enable-coverage configuration option to make the unit
  21105. tests (and a new src/or/tor-cov target) to build with gcov test
  21106. coverage support.
  21107. o Testing:
  21108. - We now have rudimentary function mocking support that our unit
  21109. tests can use to test functions in isolation. Function mocking
  21110. lets the tests temporarily replace a function's dependencies with
  21111. stub functions, so that the tests can check the function without
  21112. invoking the other functions it calls.
  21113. - Add more unit tests for the <circid,channel>->circuit map, and
  21114. the destroy-cell-tracking code to fix bug 7912.
  21115. - Unit tests for failing cases of the TAP onion handshake.
  21116. - More unit tests for address-manipulation functions.
  21117. o Minor features (protecting client timestamps):
  21118. - Clients no longer send timestamps in their NETINFO cells. These were
  21119. not used for anything, and they provided one small way for clients
  21120. to be distinguished from each other as they moved from network to
  21121. network or behind NAT. Implements part of proposal 222.
  21122. - Clients now round timestamps in INTRODUCE cells down to the nearest
  21123. 10 minutes. If a new Support022HiddenServices option is set to 0, or
  21124. if it's set to "auto" and the feature is disabled in the consensus,
  21125. the timestamp is sent as 0 instead. Implements part of proposal 222.
  21126. - Stop sending timestamps in AUTHENTICATE cells. This is not such
  21127. a big deal from a security point of view, but it achieves no actual
  21128. good purpose, and isn't needed. Implements part of proposal 222.
  21129. - Reduce down accuracy of timestamps in hidden service descriptors.
  21130. Implements part of proposal 222.
  21131. o Minor features (config options):
  21132. - Config (torrc) lines now handle fingerprints which are missing
  21133. their initial '$'. Resolves ticket 4341; improvement over 0.0.9pre5.
  21134. - Support a --dump-config option to print some or all of the
  21135. configured options. Mainly useful for debugging the command-line
  21136. option parsing code. Helps resolve ticket 4647.
  21137. - Raise awareness of safer logging: notify user of potentially
  21138. unsafe config options, like logging more verbosely than severity
  21139. "notice" or setting SafeLogging to 0. Resolves ticket 5584.
  21140. - Add a new configuration option TestingV3AuthVotingStartOffset
  21141. that bootstraps a network faster by changing the timing for
  21142. consensus votes. Addresses ticket 8532.
  21143. - Add a new torrc option "ServerTransportOptions" that allows
  21144. bridge operators to pass configuration parameters to their
  21145. pluggable transports. Resolves ticket 8929.
  21146. - The config (torrc) file now accepts bandwidth and space limits in
  21147. bits as well as bytes. (Anywhere that you can say "2 Kilobytes",
  21148. you can now say "16 kilobits", and so on.) Resolves ticket 9214.
  21149. Patch by CharlieB.
  21150. o Minor features (build):
  21151. - Add support for `--library-versions` flag. Implements ticket 6384.
  21152. - Return the "unexpected sendme" warnings to a warn severity, but make
  21153. them rate limited, to help diagnose ticket 8093.
  21154. - Detect a missing asciidoc, and warn the user about it, during
  21155. configure rather than at build time. Fixes issue 6506. Patch from
  21156. Arlo Breault.
  21157. o Minor features (other):
  21158. - Use the SOCK_NONBLOCK socket type, if supported, to open nonblocking
  21159. sockets in a single system call. Implements ticket 5129.
  21160. - Log current accounting state (bytes sent and received + remaining
  21161. time for the current accounting period) in the relay's heartbeat
  21162. message. Implements ticket 5526; patch from Peter Retzlaff.
  21163. - Implement the TRANSPORT_LAUNCHED control port event that
  21164. notifies controllers about new launched pluggable
  21165. transports. Resolves ticket 5609.
  21166. - If we're using the pure-C 32-bit curve25519_donna implementation
  21167. of curve25519, build it with the -fomit-frame-pointer option to
  21168. make it go faster on register-starved hosts. This improves our
  21169. handshake performance by about 6% on i386 hosts without nacl.
  21170. Closes ticket 8109.
  21171. - Update to the September 4 2013 Maxmind GeoLite Country database.
  21172. o Minor bugfixes:
  21173. - Set the listen() backlog limit to the largest actually supported
  21174. on the system, not to the value in a header file. Fixes bug 9716;
  21175. bugfix on every released Tor.
  21176. - No longer accept malformed http headers when parsing urls from
  21177. headers. Now we reply with Bad Request ("400"). Fixes bug 2767;
  21178. bugfix on 0.0.6pre1.
  21179. - In munge_extrainfo_into_routerinfo(), check the return value of
  21180. memchr(). This would have been a serious issue if we ever passed
  21181. it a non-extrainfo. Fixes bug 8791; bugfix on 0.2.0.6-alpha. Patch
  21182. from Arlo Breault.
  21183. - On the chance that somebody manages to build Tor on a
  21184. platform where time_t is unsigned, correct the way that
  21185. microdesc_add_to_cache() handles negative time arguments.
  21186. Fixes bug 8042; bugfix on 0.2.3.1-alpha.
  21187. - Reject relative control socket paths and emit a warning. Previously,
  21188. single-component control socket paths would be rejected, but Tor
  21189. would not log why it could not validate the config. Fixes bug 9258;
  21190. bugfix on 0.2.3.16-alpha.
  21191. o Minor bugfixes (command line):
  21192. - Use a single command-line parser for parsing torrc options on the
  21193. command line and for finding special command-line options to avoid
  21194. inconsistent behavior for torrc option arguments that have the same
  21195. names as command-line options. Fixes bugs 4647 and 9578; bugfix on
  21196. 0.0.9pre5.
  21197. - No longer allow 'tor --hash-password' with no arguments. Fixes bug
  21198. 9573; bugfix on 0.0.9pre5.
  21199. o Minor fixes (build, auxiliary programs):
  21200. - Stop preprocessing the "torify" script with autoconf, since
  21201. it no longer refers to LOCALSTATEDIR. Fixes bug 5505; patch
  21202. from Guilhem.
  21203. - The tor-fw-helper program now follows the standard convention and
  21204. exits with status code "0" on success. Fixes bug 9030; bugfix on
  21205. 0.2.3.1-alpha. Patch by Arlo Breault.
  21206. - Corrected ./configure advice for what openssl dev package you should
  21207. install on Debian. Fixes bug 9207; bugfix on 0.2.0.1-alpha.
  21208. o Minor code improvements:
  21209. - Remove constants and tests for PKCS1 padding; it's insecure and
  21210. shouldn't be used for anything new. Fixes bug 8792; patch
  21211. from Arlo Breault.
  21212. - Remove instances of strcpy() from the unit tests. They weren't
  21213. hurting anything, since they were only in the unit tests, but it's
  21214. embarrassing to have strcpy() in the code at all, and some analysis
  21215. tools don't like it. Fixes bug 8790; bugfix on 0.2.3.6-alpha and
  21216. 0.2.3.8-alpha. Patch from Arlo Breault.
  21217. o Removed features:
  21218. - Remove migration code from when we renamed the "cached-routers"
  21219. file to "cached-descriptors" back in 0.2.0.8-alpha. This
  21220. incidentally resolves ticket 6502 by cleaning up the related code
  21221. a bit. Patch from Akshay Hebbar.
  21222. o Code simplification and refactoring:
  21223. - Extract the common duplicated code for creating a subdirectory
  21224. of the data directory and writing to a file in it. Fixes ticket
  21225. 4282; patch from Peter Retzlaff.
  21226. - Since OpenSSL 0.9.7, the i2d_*() functions support allocating output
  21227. buffer. Avoid calling twice: i2d_RSAPublicKey(), i2d_DHparams(),
  21228. i2d_X509(), and i2d_PublicKey(). Resolves ticket 5170.
  21229. - Add a set of accessor functions for the circuit timeout data
  21230. structure. Fixes ticket 6153; patch from "piet".
  21231. - Clean up exit paths from connection_listener_new(). Closes ticket
  21232. 8789. Patch from Arlo Breault.
  21233. - Since we rely on OpenSSL 0.9.8 now, we can use EVP_PKEY_cmp()
  21234. and drop our own custom pkey_eq() implementation. Fixes bug 9043.
  21235. - Use a doubly-linked list to implement the global circuit list.
  21236. Resolves ticket 9108. Patch from Marek Majkowski.
  21237. - Remove contrib/id_to_fp.c since it wasn't used anywhere.
  21238. Changes in version 0.2.4.17-rc - 2013-09-05
  21239. Tor 0.2.4.17-rc is the third release candidate for the Tor 0.2.4.x
  21240. series. It adds an emergency step to help us tolerate the massive
  21241. influx of users: 0.2.4 clients using the new (faster and safer) "NTor"
  21242. circuit-level handshakes now effectively jump the queue compared to
  21243. the 0.2.3 clients using "TAP" handshakes. This release also fixes a
  21244. big bug hindering bridge reachability tests.
  21245. o Major features:
  21246. - Relays now process the new "NTor" circuit-level handshake requests
  21247. with higher priority than the old "TAP" circuit-level handshake
  21248. requests. We still process some TAP requests to not totally starve
  21249. 0.2.3 clients when NTor becomes popular. A new consensus parameter
  21250. "NumNTorsPerTAP" lets us tune the balance later if we need to.
  21251. Implements ticket 9574.
  21252. o Major bugfixes:
  21253. - If the circuit build timeout logic is disabled (via the consensus,
  21254. or because we are an authority), then don't build testing circuits.
  21255. Fixes bug 9657; bugfix on 0.2.2.14-alpha.
  21256. - Bridges now send AUTH_CHALLENGE cells during their v3 handshakes;
  21257. previously they did not, which prevented them from receiving
  21258. successful connections from relays for self-test or bandwidth
  21259. testing. Also, when a relay is extending a circuit to a bridge,
  21260. it needs to send a NETINFO cell, even when the bridge hasn't sent
  21261. an AUTH_CHALLENGE cell. Fixes bug 9546; bugfix on 0.2.3.6-alpha.
  21262. - If the time to download the next old-style networkstatus is in
  21263. the future, do not decline to consider whether to download the
  21264. next microdescriptor networkstatus. Fixes bug 9564; bugfix on
  21265. 0.2.3.14-alpha.
  21266. o Minor bugfixes:
  21267. - Avoid double-closing the listener socket in our socketpair()
  21268. replacement (used on Windows) in the case where the addresses on
  21269. our opened sockets don't match what we expected. Fixes bug 9400;
  21270. bugfix on 0.0.2pre7. Found by Coverity.
  21271. o Minor fixes (config options):
  21272. - Avoid overflows when the user sets MaxCircuitDirtiness to a
  21273. ridiculously high value, by imposing a (ridiculously high) 30-day
  21274. maximum on MaxCircuitDirtiness.
  21275. - Fix the documentation of HeartbeatPeriod to say that the heartbeat
  21276. message is logged at notice, not at info.
  21277. - Warn and fail if a server is configured not to advertise any
  21278. ORPorts at all. (We need *something* to put in our descriptor,
  21279. or we just won't work.)
  21280. o Minor features:
  21281. - Track how many "TAP" and "NTor" circuit handshake requests we get,
  21282. and how many we complete, and log it every hour to help relay
  21283. operators follow trends in network load. Addresses ticket 9658.
  21284. - Update to the August 7 2013 Maxmind GeoLite Country database.
  21285. Changes in version 0.2.4.16-rc - 2013-08-10
  21286. Tor 0.2.4.16-rc is the second release candidate for the Tor 0.2.4.x
  21287. series. It fixes several crash bugs in the 0.2.4 branch.
  21288. o Major bugfixes:
  21289. - Fix a bug in the voting algorithm that could yield incorrect results
  21290. when a non-naming authority declared too many flags. Fixes bug 9200;
  21291. bugfix on 0.2.0.3-alpha.
  21292. - Fix an uninitialized read that could in some cases lead to a remote
  21293. crash while parsing INTRODUCE2 cells. Bugfix on 0.2.4.1-alpha.
  21294. Anybody running a hidden service on the experimental 0.2.4.x
  21295. branch should upgrade. (This is, so far as we know, unrelated to
  21296. the recent news.)
  21297. - Avoid an assertion failure when processing DNS replies without the
  21298. answer types we expected. Fixes bug 9337; bugfix on 0.2.4.7-alpha.
  21299. - Avoid a crash when using --hash-password. Fixes bug 9295; bugfix on
  21300. 0.2.4.15-rc. Found by stem integration tests.
  21301. o Minor bugfixes:
  21302. - Fix an invalid memory read that occurred when a pluggable
  21303. transport proxy failed its configuration protocol.
  21304. Fixes bug 9288; bugfix on 0.2.4.1-alpha.
  21305. - When evaluating whether to use a connection that we haven't
  21306. decided is canonical using a recent link protocol version,
  21307. decide that it's canonical only if it used address _does_
  21308. match the desired address. Fixes bug 9309; bugfix on
  21309. 0.2.4.4-alpha. Reported by skruffy.
  21310. - Make the default behavior of NumDirectoryGuards be to track
  21311. NumEntryGuards. Now a user who changes only NumEntryGuards will get
  21312. the behavior she expects. Fixes bug 9354; bugfix on 0.2.4.8-alpha.
  21313. - Fix a spurious compilation warning with some older versions of
  21314. GCC on FreeBSD. Fixes bug 9254; bugfix on 0.2.4.14-alpha.
  21315. o Minor features:
  21316. - Update to the July 3 2013 Maxmind GeoLite Country database.
  21317. Changes in version 0.2.4.15-rc - 2013-07-01
  21318. Tor 0.2.4.15-rc is the first release candidate for the Tor 0.2.4.x
  21319. series. It fixes a few smaller bugs, but generally appears stable.
  21320. Please test it and let us know whether it is!
  21321. o Major bugfixes:
  21322. - When receiving a new configuration file via the control port's
  21323. LOADCONF command, do not treat the defaults file as absent.
  21324. Fixes bug 9122; bugfix on 0.2.3.9-alpha.
  21325. o Minor features:
  21326. - Issue a warning when running with the bufferevents backend enabled.
  21327. It's still not stable, and people should know that they're likely
  21328. to hit unexpected problems. Closes ticket 9147.
  21329. Changes in version 0.2.4.14-alpha - 2013-06-18
  21330. Tor 0.2.4.14-alpha fixes a pair of client guard enumeration problems
  21331. present in 0.2.4.13-alpha.
  21332. o Major bugfixes:
  21333. - When we have too much memory queued in circuits (according to a new
  21334. MaxMemInCellQueues option), close the circuits consuming the most
  21335. memory. This prevents us from running out of memory as a relay if
  21336. circuits fill up faster than they can be drained. Fixes bug 9063;
  21337. bugfix on the 54th commit of Tor. This bug is a further fix beyond
  21338. bug 6252, whose fix was merged into 0.2.3.21-rc.
  21339. This change also fixes an earlier approach taken in 0.2.4.13-alpha,
  21340. where we tried to solve this issue simply by imposing an upper limit
  21341. on the number of queued cells for a single circuit. That approach
  21342. proved to be problematic, since there are ways to provoke clients to
  21343. send a number of cells in excess of any such reasonable limit. Fixes
  21344. bug 9072; bugfix on 0.2.4.13-alpha.
  21345. - Limit hidden service descriptors to at most ten introduction
  21346. points, to slow one kind of guard enumeration. Fixes bug 9002;
  21347. bugfix on 0.1.1.11-alpha.
  21348. Changes in version 0.2.4.13-alpha - 2013-06-14
  21349. Tor 0.2.4.13-alpha fixes a variety of potential remote crash
  21350. vulnerabilities, makes socks5 username/password circuit isolation
  21351. actually actually work (this time for sure!), and cleans up a bunch
  21352. of other issues in preparation for a release candidate.
  21353. o Major bugfixes (robustness):
  21354. - Close any circuit that has too many cells queued on it. Fixes
  21355. bug 9063; bugfix on the 54th commit of Tor. This bug is a further
  21356. fix beyond bug 6252, whose fix was merged into 0.2.3.21-rc.
  21357. - Prevent the get_freelists() function from running off the end of
  21358. the list of freelists if it somehow gets an unrecognized
  21359. allocation. Fixes bug 8844; bugfix on 0.2.0.16-alpha. Reported by
  21360. eugenis.
  21361. - Avoid an assertion failure on OpenBSD (and perhaps other BSDs)
  21362. when an exit connection with optimistic data succeeds immediately
  21363. rather than returning EINPROGRESS. Fixes bug 9017; bugfix on
  21364. 0.2.3.1-alpha.
  21365. - Fix a directory authority crash bug when building a consensus
  21366. using an older consensus as its basis. Fixes bug 8833. Bugfix
  21367. on 0.2.4.12-alpha.
  21368. o Major bugfixes:
  21369. - Avoid a memory leak where we would leak a consensus body when we
  21370. find that a consensus which we couldn't previously verify due to
  21371. missing certificates is now verifiable. Fixes bug 8719; bugfix
  21372. on 0.2.0.10-alpha.
  21373. - We used to always request authority certificates by identity digest,
  21374. meaning we'd get the newest one even when we wanted one with a
  21375. different signing key. Then we would complain about being given
  21376. a certificate we already had, and never get the one we really
  21377. wanted. Now we use the "fp-sk/" resource as well as the "fp/"
  21378. resource to request the one we want. Fixes bug 5595; bugfix on
  21379. 0.2.0.8-alpha.
  21380. - Follow the socks5 protocol when offering username/password
  21381. authentication. The fix for bug 8117 exposed this bug, and it
  21382. turns out real-world applications like Pidgin do care. Bugfix on
  21383. 0.2.3.2-alpha; fixes bug 8879.
  21384. - Prevent failures on Windows Vista and later when rebuilding the
  21385. microdescriptor cache. Diagnosed by Robert Ransom. Fixes bug 8822;
  21386. bugfix on 0.2.4.12-alpha.
  21387. o Minor bugfixes:
  21388. - Fix an impossible buffer overrun in the AES unit tests. Fixes
  21389. bug 8845; bugfix on 0.2.0.7-alpha. Found by eugenis.
  21390. - If for some reason we fail to write a microdescriptor while
  21391. rebuilding the cache, do not let the annotations from that
  21392. microdescriptor linger in the cache file, and do not let the
  21393. microdescriptor stay recorded as present in its old location.
  21394. Fixes bug 9047; bugfix on 0.2.2.6-alpha.
  21395. - Fix a memory leak that would occur whenever a configuration
  21396. option changed. Fixes bug 8718; bugfix on 0.2.3.3-alpha.
  21397. - Paste the description for PathBias parameters from the man
  21398. page into or.h, so the code documents them too. Fixes bug 7982;
  21399. bugfix on 0.2.3.17-beta and 0.2.4.8-alpha.
  21400. - Relays now treat a changed IPv6 ORPort as sufficient reason to
  21401. publish an updated descriptor. Fixes bug 6026; bugfix on
  21402. 0.2.4.1-alpha.
  21403. - When launching a resolve request on behalf of an AF_UNIX control
  21404. socket, omit the address field of the new entry connection, used in
  21405. subsequent controller events, rather than letting tor_dup_addr()
  21406. set it to "<unknown address type>". Fixes bug 8639; bugfix on
  21407. 0.2.4.12-alpha.
  21408. o Minor bugfixes (log messages):
  21409. - Fix a scaling issue in the path bias accounting code that
  21410. resulted in "Bug:" log messages from either
  21411. pathbias_scale_close_rates() or pathbias_count_build_success().
  21412. This represents a bugfix on a previous bugfix: the original fix
  21413. attempted in 0.2.4.10-alpha was incomplete. Fixes bug 8235; bugfix
  21414. on 0.2.4.1-alpha.
  21415. - Give a less useless error message when the user asks for an IPv4
  21416. address on an IPv6-only port, or vice versa. Fixes bug 8846; bugfix
  21417. on 0.2.4.7-alpha.
  21418. o Minor features:
  21419. - Downgrade "unexpected SENDME" warnings to protocol-warn for 0.2.4.x,
  21420. to tolerate bug 8093 for now.
  21421. - Add an "ignoring-advertised-bws" boolean to the flag-threshold lines
  21422. in directory authority votes to describe whether they have enough
  21423. measured bandwidths to ignore advertised (relay descriptor)
  21424. bandwidth claims. Resolves ticket 8711.
  21425. - Update to the June 5 2013 Maxmind GeoLite Country database.
  21426. o Removed documentation:
  21427. - Remove some of the older contents of doc/ as obsolete; move others
  21428. to torspec.git. Fixes bug 8965.
  21429. o Code simplification and refactoring:
  21430. - Avoid using character buffers when constructing most directory
  21431. objects: this approach was unwieldy and error-prone. Instead,
  21432. build smartlists of strings, and concatenate them when done.
  21433. Changes in version 0.2.4.12-alpha - 2013-04-18
  21434. Tor 0.2.4.12-alpha moves Tor forward on several fronts: it starts the
  21435. process for lengthening the guard rotation period, makes directory
  21436. authority opinions in the consensus a bit less gameable, makes socks5
  21437. username/password circuit isolation actually work, and fixes a wide
  21438. variety of other issues.
  21439. o Major features:
  21440. - Raise the default time that a client keeps an entry guard from
  21441. "1-2 months" to "2-3 months", as suggested by Tariq Elahi's WPES
  21442. 2012 paper. (We would make it even longer, but we need better client
  21443. load balancing first.) Also, make the guard lifetime controllable
  21444. via a new GuardLifetime torrc option and a GuardLifetime consensus
  21445. parameter. Start of a fix for bug 8240; bugfix on 0.1.1.11-alpha.
  21446. - Directory authorities now prefer using measured bandwidths to
  21447. advertised ones when computing flags and thresholds. Resolves
  21448. ticket 8273.
  21449. - Directory authorities that have more than a threshold number
  21450. of relays with measured bandwidths now treat relays with unmeasured
  21451. bandwidths as having bandwidth 0. Resolves ticket 8435.
  21452. o Major bugfixes (assert / resource use):
  21453. - Avoid a bug where our response to TLS renegotiation under certain
  21454. network conditions could lead to a busy-loop, with 100% CPU
  21455. consumption. Fixes bug 5650; bugfix on 0.2.0.16-alpha.
  21456. - Avoid an assertion when we discover that we'd like to write a cell
  21457. onto a closing connection: just discard the cell. Fixes another
  21458. case of bug 7350; bugfix on 0.2.4.4-alpha.
  21459. o Major bugfixes (client-side privacy):
  21460. - When we mark a circuit as unusable for new circuits, have it
  21461. continue to be unusable for new circuits even if MaxCircuitDirtiness
  21462. is increased too much at the wrong time, or the system clock jumps
  21463. backwards. Fixes bug 6174; bugfix on 0.0.2pre26.
  21464. - If ClientDNSRejectInternalAddresses ("do not believe DNS queries
  21465. which have resolved to internal addresses") is set, apply that
  21466. rule to IPv6 as well. Fixes bug 8475; bugfix on 0.2.0.7-alpha.
  21467. - When an exit relay rejects a stream with reason "exit policy", but
  21468. we only know an exit policy summary (e.g. from the microdesc
  21469. consensus) for it, do not mark the relay as useless for all exiting.
  21470. Instead, mark just the circuit as unsuitable for that particular
  21471. address. Fixes part of bug 7582; bugfix on 0.2.3.2-alpha.
  21472. - Allow applications to get proper stream isolation with
  21473. IsolateSOCKSAuth. Many SOCKS5 clients that want to offer
  21474. username/password authentication also offer "no authentication". Tor
  21475. had previously preferred "no authentication", so the applications
  21476. never actually sent Tor their auth details. Now Tor selects
  21477. username/password authentication if it's offered. You can disable
  21478. this behavior on a per-SOCKSPort basis via PreferSOCKSNoAuth. Fixes
  21479. bug 8117; bugfix on 0.2.3.3-alpha.
  21480. o Major bugfixes (other):
  21481. - When unable to find any working directory nodes to use as a
  21482. directory guard, give up rather than adding the same non-working
  21483. nodes to the directory guard list over and over. Fixes bug 8231;
  21484. bugfix on 0.2.4.8-alpha.
  21485. o Minor features:
  21486. - Reject as invalid most directory objects containing a NUL.
  21487. Belt-and-suspender fix for bug 8037.
  21488. - In our testsuite, create temporary directories with a bit more
  21489. entropy in their name to make name collisions less likely. Fixes
  21490. bug 8638.
  21491. - Add CACHED keyword to ADDRMAP events in the control protocol
  21492. to indicate whether a DNS result will be cached or not. Resolves
  21493. ticket 8596.
  21494. - Update to the April 3 2013 Maxmind GeoLite Country database.
  21495. o Minor features (build):
  21496. - Detect and reject attempts to build Tor with threading support
  21497. when OpenSSL has been compiled without threading support.
  21498. Fixes bug 6673.
  21499. - Clarify that when autoconf is checking for nacl, it is checking
  21500. specifically for nacl with a fast curve25519 implementation.
  21501. Fixes bug 8014.
  21502. - Warn if building on a platform with an unsigned time_t: there
  21503. are too many places where Tor currently assumes that time_t can
  21504. hold negative values. We'd like to fix them all, but probably
  21505. some will remain.
  21506. o Minor bugfixes (build):
  21507. - Fix some bugs in tor-fw-helper-natpmp when trying to build and
  21508. run it on Windows. More bugs likely remain. Patch from Gisle Vanem.
  21509. Fixes bug 7280; bugfix on 0.2.3.1-alpha.
  21510. - Add the old src/or/micro-revision.i filename to CLEANFILES.
  21511. On the off chance that somebody has one, it will go away as soon
  21512. as they run "make clean". Fix for bug 7143; bugfix on 0.2.4.1-alpha.
  21513. - Build Tor correctly on 32-bit platforms where the compiler can build
  21514. but not run code using the "uint128_t" construction. Fixes bug 8587;
  21515. bugfix on 0.2.4.8-alpha.
  21516. - Fix compilation warning with some versions of clang that would
  21517. prefer the -Wswitch-enum compiler flag to warn about switch
  21518. statements with missing enum values, even if those switch
  21519. statements have a "default:" statement. Fixes bug 8598; bugfix
  21520. on 0.2.4.10-alpha.
  21521. o Minor bugfixes (protocol):
  21522. - Fix the handling of a TRUNCATE cell when it arrives while the
  21523. circuit extension is in progress. Fixes bug 7947; bugfix on 0.0.7.1.
  21524. - Fix a misframing issue when reading the version numbers in a
  21525. VERSIONS cell. Previously we would recognize [00 01 00 02] as
  21526. 'version 1, version 2, and version 0x100', when it should have
  21527. only included versions 1 and 2. Fixes bug 8059; bugfix on
  21528. 0.2.0.10-alpha. Reported pseudonymously.
  21529. - Make the format and order of STREAM events for DNS lookups
  21530. consistent among the various ways to launch DNS lookups. Fixes
  21531. bug 8203; bugfix on 0.2.0.24-rc. Patch by "Desoxy".
  21532. - Correct our check for which versions of Tor support the EXTEND2
  21533. cell. We had been willing to send it to Tor 0.2.4.7-alpha and
  21534. later, when support was really added in version 0.2.4.8-alpha.
  21535. Fixes bug 8464; bugfix on 0.2.4.8-alpha.
  21536. o Minor bugfixes (other):
  21537. - Correctly store microdescriptors and extrainfo descriptors with
  21538. an internal NUL byte. Fixes bug 8037; bugfix on 0.2.0.1-alpha.
  21539. Bug reported by "cypherpunks".
  21540. - Increase the width of the field used to remember a connection's
  21541. link protocol version to two bytes. Harmless for now, since the
  21542. only currently recognized versions are one byte long. Reported
  21543. pseudonymously. Fixes bug 8062; bugfix on 0.2.0.10-alpha.
  21544. - If the state file's path bias counts are invalid (presumably from a
  21545. buggy Tor prior to 0.2.4.10-alpha), make them correct. Also add
  21546. additional checks and log messages to the scaling of Path Bias
  21547. counts, in case there still are remaining issues with scaling.
  21548. Should help resolve bug 8235.
  21549. - Eliminate several instances where we use "Nickname=ID" to refer to
  21550. nodes in logs. Use "Nickname (ID)" instead. (Elsewhere, we still use
  21551. "$ID=Nickname", which is also acceptable.) Fixes bug 7065. Bugfix
  21552. on 0.2.3.21-rc, 0.2.4.5-alpha, 0.2.4.8-alpha, and 0.2.4.10-alpha.
  21553. o Minor bugfixes (syscalls):
  21554. - Always check the return values of functions fcntl() and
  21555. setsockopt(). We don't believe these are ever actually failing in
  21556. practice, but better safe than sorry. Also, checking these return
  21557. values should please analysis tools like Coverity. Patch from
  21558. 'flupzor'. Fixes bug 8206; bugfix on all versions of Tor.
  21559. - Use direct writes rather than stdio when building microdescriptor
  21560. caches, in an attempt to mitigate bug 8031, or at least make it
  21561. less common.
  21562. o Minor bugfixes (config):
  21563. - When rejecting a configuration because we were unable to parse a
  21564. quoted string, log an actual error message. Fixes bug 7950; bugfix
  21565. on 0.2.0.16-alpha.
  21566. - Behave correctly when the user disables LearnCircuitBuildTimeout
  21567. but doesn't tell us what they would like the timeout to be. Fixes
  21568. bug 6304; bugfix on 0.2.2.14-alpha.
  21569. - When autodetecting the number of CPUs, use the number of available
  21570. CPUs in preference to the number of configured CPUs. Inform the
  21571. user if this reduces the number of available CPUs. Fixes bug 8002;
  21572. bugfix on 0.2.3.1-alpha.
  21573. - Make it an error when you set EntryNodes but disable UseGuardNodes,
  21574. since it will (surprisingly to some users) ignore EntryNodes. Fixes
  21575. bug 8180; bugfix on 0.2.3.11-alpha.
  21576. - Allow TestingTorNetworks to override the 4096-byte minimum for
  21577. the Fast threshold. Otherwise they can't bootstrap until they've
  21578. observed more traffic. Fixes bug 8508; bugfix on 0.2.4.10-alpha.
  21579. - Fix some logic errors when the user manually overrides the
  21580. PathsNeededToBuildCircuits option in torrc. Fixes bug 8599; bugfix
  21581. on 0.2.4.10-alpha.
  21582. o Minor bugfixes (log messages to help diagnose bugs):
  21583. - If we fail to free a microdescriptor because of bug 7164, log
  21584. the filename and line number from which we tried to free it.
  21585. - Add another diagnostic to the heartbeat message: track and log
  21586. overhead that TLS is adding to the data we write. If this is
  21587. high, we are sending too little data to SSL_write at a time.
  21588. Diagnostic for bug 7707.
  21589. - Add more detail to a log message about relaxed timeouts, to help
  21590. track bug 7799.
  21591. - Warn more aggressively when flushing microdescriptors to a
  21592. microdescriptor cache fails, in an attempt to mitigate bug 8031,
  21593. or at least make it more diagnosable.
  21594. - Improve debugging output to help track down bug 8185 ("Bug:
  21595. outgoing relay cell has n_chan==NULL. Dropping.")
  21596. - Log the purpose of a path-bias testing circuit correctly.
  21597. Improves a log message from bug 8477; bugfix on 0.2.4.8-alpha.
  21598. o Minor bugfixes (0.2.4.x log messages that were too noisy):
  21599. - Don't attempt to relax the timeout of already opened 1-hop circuits.
  21600. They might never timeout. This should eliminate some/all cases of
  21601. the relaxed timeout log message.
  21602. - Use circuit creation time for network liveness evaluation. This
  21603. should eliminate warning log messages about liveness caused
  21604. by changes in timeout evaluation. Fixes bug 6572; bugfix on
  21605. 0.2.4.8-alpha.
  21606. - Reduce a path bias length check from notice to info. The message
  21607. is triggered when creating controller circuits. Fixes bug 8196;
  21608. bugfix on 0.2.4.8-alpha.
  21609. - Fix a path state issue that triggered a notice during relay startup.
  21610. Fixes bug 8320; bugfix on 0.2.4.10-alpha.
  21611. - Reduce occurrences of warns about circuit purpose in
  21612. connection_ap_expire_building(). Fixes bug 8477; bugfix on
  21613. 0.2.4.11-alpha.
  21614. o Minor bugfixes (pre-0.2.4.x log messages that were too noisy):
  21615. - If we encounter a write failure on a SOCKS connection before we
  21616. finish our SOCKS handshake, don't warn that we closed the
  21617. connection before we could send a SOCKS reply. Fixes bug 8427;
  21618. bugfix on 0.1.0.1-rc.
  21619. - Correctly recognize that [::1] is a loopback address. Fixes
  21620. bug 8377; bugfix on 0.2.1.3-alpha.
  21621. - Fix a directory authority warn caused when we have a large amount
  21622. of badexit bandwidth. Fixes bug 8419; bugfix on 0.2.2.10-alpha.
  21623. - Don't log inappropriate heartbeat messages when hibernating: a
  21624. hibernating node is _expected_ to drop out of the consensus,
  21625. decide it isn't bootstrapped, and so forth. Fixes bug 7302;
  21626. bugfix on 0.2.3.1-alpha.
  21627. - Don't complain about bootstrapping problems while hibernating.
  21628. These complaints reflect a general code problem, but not one
  21629. with any problematic effects (no connections are actually
  21630. opened). Fixes part of bug 7302; bugfix on 0.2.3.2-alpha.
  21631. o Documentation fixes:
  21632. - Update tor-fw-helper.1.txt and tor-fw-helper.c to make option
  21633. names match. Fixes bug 7768.
  21634. - Make the torify manpage no longer refer to tsocks; torify hasn't
  21635. supported tsocks since 0.2.3.14-alpha.
  21636. - Make the tor manpage no longer reference tsocks.
  21637. - Fix the GeoIPExcludeUnknown documentation to refer to
  21638. ExcludeExitNodes rather than the currently nonexistent
  21639. ExcludeEntryNodes. Spotted by "hamahangi" on tor-talk.
  21640. o Removed files:
  21641. - The tor-tsocks.conf is no longer distributed or installed. We
  21642. recommend that tsocks users use torsocks instead. Resolves
  21643. ticket 8290.
  21644. Changes in version 0.2.4.11-alpha - 2013-03-11
  21645. Tor 0.2.4.11-alpha makes relay measurement by directory authorities
  21646. more robust, makes hidden service authentication work again, and
  21647. resolves a DPI fingerprint for Tor's SSL transport.
  21648. o Major features (directory authorities):
  21649. - Directory authorities now support a new consensus method (17)
  21650. where they cap the published bandwidth of servers for which
  21651. insufficient bandwidth measurements exist. Fixes part of bug 2286.
  21652. - Directory authorities that set "DisableV2DirectoryInfo_ 1" no longer
  21653. serve any v2 directory information. Now we can test disabling the
  21654. old deprecated v2 directory format, and see whether doing so has
  21655. any effect on network load. Begins to fix bug 6783.
  21656. - Directory authorities now include inside each vote a statement of
  21657. the performance thresholds they used when assigning flags.
  21658. Implements ticket 8151.
  21659. o Major bugfixes (directory authorities):
  21660. - Stop marking every relay as having been down for one hour every
  21661. time we restart a directory authority. These artificial downtimes
  21662. were messing with our Stable and Guard flag calculations. Fixes
  21663. bug 8218 (introduced by the fix for 1035). Bugfix on 0.2.2.23-alpha.
  21664. o Major bugfixes (hidden services):
  21665. - Allow hidden service authentication to succeed again. When we
  21666. refactored the hidden service introduction code back
  21667. in 0.2.4.1-alpha, we didn't update the code that checks
  21668. whether authentication information is present, causing all
  21669. authentication checks to return "false". Fix for bug 8207; bugfix
  21670. on 0.2.4.1-alpha. Found by Coverity; this is CID 718615.
  21671. o Minor features (relays, bridges):
  21672. - Make bridge relays check once a minute for whether their IP
  21673. address has changed, rather than only every 15 minutes. Resolves
  21674. bugs 1913 and 1992.
  21675. - Refactor resolve_my_address() so it returns the method by which we
  21676. decided our public IP address (explicitly configured, resolved from
  21677. explicit hostname, guessed from interfaces, learned by gethostname).
  21678. Now we can provide more helpful log messages when a relay guesses
  21679. its IP address incorrectly (e.g. due to unexpected lines in
  21680. /etc/hosts). Resolves ticket 2267.
  21681. - Teach bridge-using clients to avoid 0.2.2 bridges when making
  21682. microdescriptor-related dir requests, and only fall back to normal
  21683. descriptors if none of their bridges can handle microdescriptors
  21684. (as opposed to the fix in ticket 4013, which caused them to fall
  21685. back to normal descriptors if *any* of their bridges preferred
  21686. them). Resolves ticket 4994.
  21687. - Randomize the lifetime of our SSL link certificate, so censors can't
  21688. use the static value for filtering Tor flows. Resolves ticket 8443;
  21689. related to ticket 4014 which was included in 0.2.2.33.
  21690. - Support a new version of the link protocol that allows 4-byte circuit
  21691. IDs. Previously, circuit IDs were limited to 2 bytes, which presented
  21692. a possible resource exhaustion issue. Closes ticket 7351; implements
  21693. proposal 214.
  21694. o Minor features (portability):
  21695. - Tweak the curve25519-donna*.c implementations to tolerate systems
  21696. that lack stdint.h. Fixes bug 3894; bugfix on 0.2.4.8-alpha.
  21697. - Use Ville Laurikari's implementation of AX_CHECK_SIGN() to determine
  21698. the signs of types during autoconf. This is better than our old
  21699. approach, which didn't work when cross-compiling.
  21700. - Detect the sign of enum values, rather than assuming that MSC is the
  21701. only compiler where enum types are all signed. Fixes bug 7727;
  21702. bugfix on 0.2.4.10-alpha.
  21703. o Minor features (other):
  21704. - Say "KBytes" rather than "KB" in the man page (for various values
  21705. of K), to further reduce confusion about whether Tor counts in
  21706. units of memory or fractions of units of memory. Resolves ticket 7054.
  21707. - Clear the high bit on curve25519 public keys before passing them to
  21708. our backend, in case we ever wind up using a backend that doesn't do
  21709. so itself. If we used such a backend, and *didn't* clear the high bit,
  21710. we could wind up in a situation where users with such backends would
  21711. be distinguishable from users without. Fixes bug 8121; bugfix on
  21712. 0.2.4.8-alpha.
  21713. - Update to the March 6 2013 Maxmind GeoLite Country database.
  21714. o Minor bugfixes (clients):
  21715. - When we receive a RELAY_END cell with the reason DONE, or with no
  21716. reason, before receiving a RELAY_CONNECTED cell, report the SOCKS
  21717. status as "connection refused". Previously we reported these cases
  21718. as success but then immediately closed the connection. Fixes bug
  21719. 7902; bugfix on 0.1.0.1-rc. Reported by "oftc_must_be_destroyed".
  21720. - Downgrade an assertion in connection_ap_expire_beginning to an
  21721. LD_BUG message. The fix for bug 8024 should prevent this message
  21722. from displaying, but just in case, a warn that we can diagnose
  21723. is better than more assert crashes. Fixes bug 8065; bugfix on
  21724. 0.2.4.8-alpha.
  21725. - Lower path use bias thresholds to .80 for notice and .60 for warn.
  21726. Also make the rate limiting flags for the path use bias log messages
  21727. independent from the original path bias flags. Fixes bug 8161;
  21728. bugfix on 0.2.4.10-alpha.
  21729. o Minor bugfixes (relays):
  21730. - Stop trying to resolve our hostname so often (e.g. every time we
  21731. think about doing a directory fetch). Now we reuse the cached
  21732. answer in some cases. Fixes bugs 1992 (bugfix on 0.2.0.20-rc)
  21733. and 2410 (bugfix on 0.1.2.2-alpha).
  21734. - Stop sending a stray "(null)" in some cases for the server status
  21735. "EXTERNAL_ADDRESS" controller event. Resolves bug 8200; bugfix
  21736. on 0.1.2.6-alpha.
  21737. - When choosing which stream on a formerly stalled circuit to wake
  21738. first, make better use of the platform's weak RNG. Previously,
  21739. we had been using the % ("modulo") operator to try to generate a
  21740. 1/N chance of picking each stream, but this behaves badly with
  21741. many platforms' choice of weak RNG. Fixes bug 7801; bugfix on
  21742. 0.2.2.20-alpha.
  21743. - Use our own weak RNG when we need a weak RNG. Windows's rand() and
  21744. Irix's random() only return 15 bits; Solaris's random() returns more
  21745. bits but its RAND_MAX says it only returns 15, and so on. Motivated
  21746. by the fix for bug 7801; bugfix on 0.2.2.20-alpha.
  21747. o Minor bugfixes (directory authorities):
  21748. - Directory authorities now use less space when formatting identical
  21749. microdescriptor lines in directory votes. Fixes bug 8158; bugfix
  21750. on 0.2.4.1-alpha.
  21751. o Minor bugfixes (memory leaks spotted by Coverity -- bug 7816):
  21752. - Avoid leaking memory if we fail to compute a consensus signature
  21753. or we generate a consensus we can't parse. Bugfix on 0.2.0.5-alpha.
  21754. - Fix a memory leak when receiving headers from an HTTPS proxy. Bugfix
  21755. on 0.2.1.1-alpha.
  21756. - Fix a memory leak during safe-cookie controller authentication.
  21757. Bugfix on 0.2.3.13-alpha.
  21758. - Avoid memory leak of IPv6 policy content if we fail to format it into
  21759. a router descriptor. Bugfix on 0.2.4.7-alpha.
  21760. o Minor bugfixes (other code correctness issues):
  21761. - Avoid a crash if we fail to generate an extrainfo descriptor.
  21762. Fixes bug 8208; bugfix on 0.2.3.16-alpha. Found by Coverity;
  21763. this is CID 718634.
  21764. - When detecting the largest possible file descriptor (in order to
  21765. close all file descriptors when launching a new program), actually
  21766. use _SC_OPEN_MAX. The old code for doing this was very, very broken.
  21767. Fixes bug 8209; bugfix on 0.2.3.1-alpha. Found by Coverity; this
  21768. is CID 743383.
  21769. - Fix a copy-and-paste error when adding a missing A1 to a routerset
  21770. because of GeoIPExcludeUnknown. Fix for Coverity CID 980650.
  21771. Bugfix on 0.2.4.10-alpha.
  21772. - Fix an impossible-to-trigger integer overflow when estimating how
  21773. long our onionskin queue would take. (This overflow would require us
  21774. to accept 4 million onionskins before processing 100 of them.) Fixes
  21775. bug 8210; bugfix on 0.2.4.10-alpha.
  21776. o Code simplification and refactoring:
  21777. - Add a wrapper function for the common "log a message with a
  21778. rate-limit" case.
  21779. Changes in version 0.2.4.10-alpha - 2013-02-04
  21780. Tor 0.2.4.10-alpha adds defenses at the directory authority level from
  21781. certain attacks that flood the network with relays; changes the queue
  21782. for circuit create requests from a sized-based limit to a time-based
  21783. limit; resumes building with MSVC on Windows; and fixes a wide variety
  21784. of other issues.
  21785. o Major bugfixes (directory authority):
  21786. - When computing directory thresholds, ignore any rejected-as-sybil
  21787. nodes during the computation so that they can't influence Fast,
  21788. Guard, etc. (We should have done this for proposal 109.) Fixes
  21789. bug 8146.
  21790. - When marking a node as a likely sybil, reset its uptime metrics
  21791. to zero, so that it cannot time towards getting marked as Guard,
  21792. Stable, or HSDir. (We should have done this for proposal 109.) Fixes
  21793. bug 8147.
  21794. o Major bugfixes:
  21795. - When a TLS write is partially successful but incomplete, remember
  21796. that the flushed part has been flushed, and notice that bytes were
  21797. actually written. Reported and fixed pseudonymously. Fixes bug
  21798. 7708; bugfix on Tor 0.1.0.5-rc.
  21799. - Reject bogus create and relay cells with 0 circuit ID or 0 stream
  21800. ID: these could be used to create unexpected streams and circuits
  21801. which would count as "present" to some parts of Tor but "absent"
  21802. to others, leading to zombie circuits and streams or to a bandwidth
  21803. denial-of-service. Fixes bug 7889; bugfix on every released version
  21804. of Tor. Reported by "oftc_must_be_destroyed".
  21805. - Rename all macros in our local copy of queue.h to begin with "TOR_".
  21806. This change seems the only good way to permanently prevent conflicts
  21807. with queue.h on various operating systems. Fixes bug 8107; bugfix
  21808. on 0.2.4.6-alpha.
  21809. o Major features (relay):
  21810. - Instead of limiting the number of queued onionskins (aka circuit
  21811. create requests) to a fixed, hard-to-configure number, we limit
  21812. the size of the queue based on how many we expect to be able to
  21813. process in a given amount of time. We estimate the time it will
  21814. take to process an onionskin based on average processing time
  21815. of previous onionskins. Closes ticket 7291. You'll never have to
  21816. configure MaxOnionsPending again.
  21817. o Major features (portability):
  21818. - Resume building correctly with MSVC and Makefile.nmake. This patch
  21819. resolves numerous bugs and fixes reported by ultramage, including
  21820. 7305, 7308, 7309, 7310, 7312, 7313, 7315, 7316, and 7669.
  21821. - Make the ntor and curve25519 code build correctly with MSVC.
  21822. Fix on 0.2.4.8-alpha.
  21823. o Minor features:
  21824. - When directory authorities are computing thresholds for flags,
  21825. never let the threshold for the Fast flag fall below 4096
  21826. bytes. Also, do not consider nodes with extremely low bandwidths
  21827. when deciding thresholds for various directory flags. This change
  21828. should raise our threshold for Fast relays, possibly in turn
  21829. improving overall network performance; see ticket 1854. Resolves
  21830. ticket 8145.
  21831. - The Tor client now ignores sub-domain components of a .onion
  21832. address. This change makes HTTP "virtual" hosting
  21833. possible: http://foo.aaaaaaaaaaaaaaaa.onion/ and
  21834. http://bar.aaaaaaaaaaaaaaaa.onion/ can be two different websites
  21835. hosted on the same hidden service. Implements proposal 204.
  21836. - We compute the overhead from passing onionskins back and forth to
  21837. cpuworkers, and report it when dumping statistics in response to
  21838. SIGUSR1. Supports ticket 7291.
  21839. o Minor features (path selection):
  21840. - When deciding whether we have enough descriptors to build circuits,
  21841. instead of looking at raw relay counts, look at which fraction
  21842. of (bandwidth-weighted) paths we're able to build. This approach
  21843. keeps clients from building circuits if their paths are likely to
  21844. stand out statistically. The default fraction of paths needed is
  21845. taken from the consensus directory; you can override it with the
  21846. new PathsNeededToBuildCircuits option. Fixes ticket 5956.
  21847. - When any country code is listed in ExcludeNodes or ExcludeExitNodes,
  21848. and we have GeoIP information, also exclude all nodes with unknown
  21849. countries "??" and "A1". This behavior is controlled by the
  21850. new GeoIPExcludeUnknown option: you can make such nodes always
  21851. excluded with "GeoIPExcludeUnknown 1", and disable the feature
  21852. with "GeoIPExcludeUnknown 0". Setting "GeoIPExcludeUnknown auto"
  21853. gets you the default behavior. Implements feature 7706.
  21854. - Path Use Bias: Perform separate accounting for successful circuit
  21855. use. Keep separate statistics on stream attempt rates versus stream
  21856. success rates for each guard. Provide configurable thresholds to
  21857. determine when to emit log messages or disable use of guards that
  21858. fail too many stream attempts. Resolves ticket 7802.
  21859. o Minor features (log messages):
  21860. - When learning a fingerprint for a bridge, log its corresponding
  21861. transport type. Implements ticket 7896.
  21862. - Improve the log message when "Bug/attack: unexpected sendme cell
  21863. from client" occurs, to help us track bug 8093.
  21864. o Minor bugfixes:
  21865. - Remove a couple of extraneous semicolons that were upsetting the
  21866. cparser library. Patch by Christian Grothoff. Fixes bug 7115;
  21867. bugfix on 0.2.2.1-alpha.
  21868. - Remove a source of rounding error during path bias count scaling;
  21869. don't count cannibalized circuits as used for path bias until we
  21870. actually try to use them; and fix a circuit_package_relay_cell()
  21871. warning message about n_chan==NULL. Fixes bug 7802.
  21872. - Detect nacl when its headers are in a nacl/ subdirectory. Also,
  21873. actually link against nacl when we're configured to use it. Fixes
  21874. bug 7972; bugfix on 0.2.4.8-alpha.
  21875. - Compile correctly with the --disable-curve25519 option. Fixes
  21876. bug 8153; bugfix on 0.2.4.8-alpha.
  21877. o Build improvements:
  21878. - Do not report status verbosely from autogen.sh unless the -v flag
  21879. is specified. Fixes issue 4664. Patch from Onizuka.
  21880. - Replace all calls to snprintf() outside of src/ext with
  21881. tor_snprintf(). Also remove the #define to replace snprintf with
  21882. _snprintf on Windows; they have different semantics, and all of
  21883. our callers should be using tor_snprintf() anyway. Fixes bug 7304.
  21884. - Try to detect if we are ever building on a platform where
  21885. memset(...,0,...) does not set the value of a double to 0.0. Such
  21886. platforms are permitted by the C standard, though in practice
  21887. they're pretty rare (since IEEE 754 is nigh-ubiquitous). We don't
  21888. currently support them, but it's better to detect them and fail
  21889. than to perform erroneously.
  21890. o Removed features:
  21891. - Stop exporting estimates of v2 and v3 directory traffic shares
  21892. in extrainfo documents. They were unneeded and sometimes inaccurate.
  21893. Also stop exporting any v2 directory request statistics. Resolves
  21894. ticket 5823.
  21895. - Drop support for detecting and warning about versions of Libevent
  21896. before 1.3e. Nothing reasonable ships with them any longer;
  21897. warning the user about them shouldn't be needed. Resolves ticket
  21898. 6826.
  21899. o Code simplifications and refactoring:
  21900. - Rename "isin" functions to "contains", for grammar. Resolves
  21901. ticket 5285.
  21902. - Rename Tor's logging function log() to tor_log(), to avoid conflicts
  21903. with the natural logarithm function from the system libm. Resolves
  21904. ticket 7599.
  21905. Changes in version 0.2.4.9-alpha - 2013-01-15
  21906. Tor 0.2.4.9-alpha provides a quick fix to make the new ntor handshake
  21907. work more robustly.
  21908. o Major bugfixes:
  21909. - Fix backward compatibility logic when receiving an embedded ntor
  21910. handshake tunneled in a CREATE cell. This clears up the "Bug:
  21911. couldn't format CREATED cell" warning. Fixes bug 7959; bugfix
  21912. on 0.2.4.8-alpha.
  21913. Changes in version 0.2.4.8-alpha - 2013-01-14
  21914. Tor 0.2.4.8-alpha introduces directory guards to reduce user enumeration
  21915. risks, adds a new stronger and faster circuit handshake, and offers
  21916. stronger and faster link encryption when both sides support it.
  21917. o Major features:
  21918. - Preliminary support for directory guards (proposal 207): when
  21919. possible, clients now use their entry guards for non-anonymous
  21920. directory requests. This can help prevent client enumeration. Note
  21921. that this behavior only works when we have a usable consensus
  21922. directory, and when options about what to download are more or less
  21923. standard. In the future we should re-bootstrap from our guards,
  21924. rather than re-bootstrapping from the preconfigured list of
  21925. directory sources that ships with Tor. Resolves ticket 6526.
  21926. - Tor relays and clients now support a better CREATE/EXTEND cell
  21927. format, allowing the sender to specify multiple address, identity,
  21928. and handshake types. Implements Robert Ransom's proposal 200;
  21929. closes ticket 7199.
  21930. o Major features (new circuit handshake):
  21931. - Tor now supports a new circuit extension handshake designed by Ian
  21932. Goldberg, Douglas Stebila, and Berkant Ustaoglu. Our original
  21933. circuit extension handshake, later called "TAP", was a bit slow
  21934. (especially on the relay side), had a fragile security proof, and
  21935. used weaker keys than we'd now prefer. The new circuit handshake
  21936. uses Dan Bernstein's "curve25519" elliptic-curve Diffie-Hellman
  21937. function, making it significantly more secure than the older
  21938. handshake, and significantly faster. Tor can use one of two built-in
  21939. pure-C curve25519-donna implementations by Adam Langley, or it
  21940. can link against the "nacl" library for a tuned version if present.
  21941. The built-in version is very fast for 64-bit systems when building
  21942. with GCC. The built-in 32-bit version is still faster than the
  21943. old TAP protocol, but using libnacl is better on most such hosts.
  21944. Clients don't currently use this protocol by default, since
  21945. comparatively few clients support it so far. To try it, set
  21946. UseNTorHandshake to 1.
  21947. Implements proposal 216; closes ticket 7202.
  21948. o Major features (better link encryption):
  21949. - Relays can now enable the ECDHE TLS ciphersuites when available
  21950. and appropriate. These ciphersuites let us negotiate forward-secure
  21951. TLS secret keys more safely and more efficiently than with our
  21952. previous use of Diffie-Hellman modulo a 1024-bit prime. By default,
  21953. public relays prefer the (faster) P224 group, and bridges prefer
  21954. the (more common) P256 group; you can override this with the
  21955. TLSECGroup option.
  21956. Enabling these ciphers was a little tricky, since for a long time,
  21957. clients had been claiming to support them without actually doing
  21958. so, in order to foil fingerprinting. But with the client-side
  21959. implementation of proposal 198 in 0.2.3.17-beta, clients can now
  21960. match the ciphers from recent Firefox versions *and* list the
  21961. ciphers they actually mean, so relays can believe such clients
  21962. when they advertise ECDHE support in their TLS ClientHello messages.
  21963. This feature requires clients running 0.2.3.17-beta or later,
  21964. and requires both sides to be running OpenSSL 1.0.0 or later
  21965. with ECC support. OpenSSL 1.0.1, with the compile-time option
  21966. "enable-ec_nistp_64_gcc_128", is highly recommended.
  21967. Implements the relay side of proposal 198; closes ticket 7200.
  21968. o Major bugfixes:
  21969. - Avoid crashing when, as a relay without IPv6-exit support, a
  21970. client insists on getting an IPv6 address or nothing. Fixes bug
  21971. 7814; bugfix on 0.2.4.7-alpha.
  21972. o Minor features:
  21973. - Improve circuit build timeout handling for hidden services.
  21974. In particular: adjust build timeouts more accurately depending
  21975. upon the number of hop-RTTs that a particular circuit type
  21976. undergoes. Additionally, launch intro circuits in parallel
  21977. if they timeout, and take the first one to reply as valid.
  21978. - Work correctly on Unix systems where EAGAIN and EWOULDBLOCK are
  21979. separate error codes; or at least, don't break for that reason.
  21980. Fixes bug 7935. Reported by "oftc_must_be_destroyed".
  21981. - Update to the January 2 2013 Maxmind GeoLite Country database.
  21982. o Minor features (testing):
  21983. - Add benchmarks for DH (1024-bit multiplicative group) and ECDH
  21984. (P-256) Diffie-Hellman handshakes to src/or/bench.
  21985. - Add benchmark functions to test onion handshake performance.
  21986. o Minor features (path bias detection):
  21987. - Alter the Path Bias log messages to be more descriptive in terms
  21988. of reporting timeouts and other statistics.
  21989. - Create three levels of Path Bias log messages, as opposed to just
  21990. two. These are configurable via consensus as well as via the torrc
  21991. options PathBiasNoticeRate, PathBiasWarnRate, PathBiasExtremeRate.
  21992. The default values are 0.70, 0.50, and 0.30 respectively.
  21993. - Separate the log message levels from the decision to drop guards,
  21994. which also is available via torrc option PathBiasDropGuards.
  21995. PathBiasDropGuards still defaults to 0 (off).
  21996. - Deprecate PathBiasDisableRate in favor of PathBiasDropGuards
  21997. in combination with PathBiasExtremeRate.
  21998. - Increase the default values for PathBiasScaleThreshold and
  21999. PathBiasCircThreshold from (200, 20) to (300, 150).
  22000. - Add in circuit usage accounting to path bias. If we try to use a
  22001. built circuit but fail for any reason, it counts as path bias.
  22002. Certain classes of circuits where the adversary gets to pick your
  22003. destination node are exempt from this accounting. Usage accounting
  22004. can be specifically disabled via consensus parameter or torrc.
  22005. - Convert all internal path bias state to double-precision floating
  22006. point, to avoid roundoff error and other issues.
  22007. - Only record path bias information for circuits that have completed
  22008. *two* hops. Assuming end-to-end tagging is the attack vector, this
  22009. makes us more resilient to ambient circuit failure without any
  22010. detection capability loss.
  22011. o Minor bugfixes (log messages):
  22012. - Rate-limit the "No circuits are opened. Relaxed timeout for a
  22013. circuit with channel state open..." message to once per hour to
  22014. keep it from filling the notice logs. Mitigates bug 7799 but does
  22015. not fix the underlying cause. Bugfix on 0.2.4.7-alpha.
  22016. - Avoid spurious warnings when configuring multiple client ports of
  22017. which only some are nonlocal. Previously, we had claimed that some
  22018. were nonlocal when in fact they weren't. Fixes bug 7836; bugfix on
  22019. 0.2.3.3-alpha.
  22020. o Code simplifications and refactoring:
  22021. - Get rid of a couple of harmless clang warnings, where we compared
  22022. enums to ints. These warnings are newly introduced in clang 3.2.
  22023. - Split the onion.c file into separate modules for the onion queue
  22024. and the different handshakes it supports.
  22025. - Remove the marshalling/unmarshalling code for sending requests to
  22026. cpuworkers over a socket, and instead just send structs. The
  22027. recipient will always be the same Tor binary as the sender, so
  22028. any encoding is overkill.
  22029. Changes in version 0.2.4.7-alpha - 2012-12-24
  22030. Tor 0.2.4.7-alpha introduces a new approach to providing fallback
  22031. directory mirrors for more robust bootstrapping; fixes more issues where
  22032. clients with changing network conditions refuse to make any circuits;
  22033. adds initial support for exiting to IPv6 addresses; resumes being able
  22034. to update our GeoIP database, and includes the geoip6 file this time;
  22035. turns off the client-side DNS cache by default due to privacy risks;
  22036. and fixes a variety of other issues.
  22037. o Major features (client resilience):
  22038. - Add a new "FallbackDir" torrc option to use when we can't use
  22039. a directory mirror from the consensus (either because we lack a
  22040. consensus, or because they're all down). Currently, all authorities
  22041. are fallbacks by default, and there are no other default fallbacks,
  22042. but that will change. This option will allow us to give clients a
  22043. longer list of servers to try to get a consensus from when first
  22044. connecting to the Tor network, and thereby reduce load on the
  22045. directory authorities. Implements proposal 206, "Preconfigured
  22046. directory sources for bootstrapping". We also removed the old
  22047. "FallbackNetworkstatus" option, since we never got it working well
  22048. enough to use it. Closes bug 572.
  22049. - If we have no circuits open, use a relaxed timeout (the
  22050. 95-percentile cutoff) until a circuit succeeds. This heuristic
  22051. should allow Tor to succeed at building circuits even when the
  22052. network connection drastically changes. Should help with bug 3443.
  22053. o Major features (IPv6):
  22054. - Relays can now exit to IPv6 addresses: make sure that you have IPv6
  22055. connectivity, then set the IPv6Exit flag to 1. Also make sure your
  22056. exit policy reads as you would like: the address * applies to all
  22057. address families, whereas *4 is IPv4 address only, and *6 is IPv6
  22058. addresses only. On the client side, you'll need to wait until the
  22059. authorities have upgraded, wait for enough exits to support IPv6,
  22060. apply the "IPv6Traffic" flag to a SocksPort, and use Socks5. Closes
  22061. ticket 5547, implements proposal 117 as revised in proposal 208.
  22062. We DO NOT recommend that clients with actual anonymity needs start
  22063. using IPv6 over Tor yet, since not enough exits support it yet.
  22064. o Major features (geoip database):
  22065. - Maxmind began labelling Tor relays as being in country "A1",
  22066. which breaks by-country node selection inside Tor. Now we use a
  22067. script to replace "A1" ("Anonymous Proxy") entries in our geoip
  22068. file with real country codes. This script fixes about 90% of "A1"
  22069. entries automatically and uses manual country code assignments to
  22070. fix the remaining 10%. See src/config/README.geoip for details.
  22071. Fixes bug 6266. Also update to the December 5 2012 Maxmind GeoLite
  22072. Country database, as modified above.
  22073. o Major bugfixes (client-side DNS):
  22074. - Turn off the client-side DNS cache by default. Updating and using
  22075. the DNS cache is now configurable on a per-client-port
  22076. level. SOCKSPort, DNSPort, etc lines may now contain
  22077. {No,}Cache{IPv4,IPv6,}DNS lines to indicate that we shouldn't
  22078. cache these types of DNS answers when we receive them from an
  22079. exit node in response to an application request on this port, and
  22080. {No,}UseCached{IPv4,IPv6,DNS} lines to indicate that if we have
  22081. cached DNS answers of these types, we shouldn't use them. It's
  22082. potentially risky to use cached DNS answers at the client, since
  22083. doing so can indicate to one exit what answers we've gotten
  22084. for DNS lookups in the past. With IPv6, this becomes especially
  22085. problematic. Using cached DNS answers for requests on the same
  22086. circuit would present less linkability risk, since all traffic
  22087. on a circuit is already linkable, but it would also provide
  22088. little performance benefit: the exit node caches DNS replies
  22089. too. Implements a simplified version of Proposal 205. Implements
  22090. ticket 7570.
  22091. o Major bugfixes (other):
  22092. - Alter circuit build timeout measurement to start at the point
  22093. where we begin the CREATE/CREATE_FAST step (as opposed to circuit
  22094. initialization). This should make our timeout measurements more
  22095. uniform. Previously, we were sometimes including ORconn setup time
  22096. in our circuit build time measurements. Should resolve bug 3443.
  22097. - Fix an assertion that could trigger in hibernate_go_dormant() when
  22098. closing an or_connection_t: call channel_mark_for_close() rather
  22099. than connection_mark_for_close(). Fixes bug 7267. Bugfix on
  22100. 0.2.4.4-alpha.
  22101. - Include the geoip6 IPv6 GeoIP database in the tarball. Fixes bug
  22102. 7655; bugfix on 0.2.4.6-alpha.
  22103. o Minor features:
  22104. - Add a new torrc option "ServerTransportListenAddr" to let bridge
  22105. operators select the address where their pluggable transports will
  22106. listen for connections. Resolves ticket 7013.
  22107. - Allow an optional $ before the node identity digest in the
  22108. controller command GETINFO ns/id/<identity>, for consistency with
  22109. md/id/<identity> and desc/id/<identity>. Resolves ticket 7059.
  22110. - Log packaged cell fullness as part of the heartbeat message.
  22111. Diagnosis to try to determine the extent of bug 7743.
  22112. o Minor features (IPv6):
  22113. - AutomapHostsOnResolve now supports IPv6 addresses. By default, we
  22114. prefer to hand out virtual IPv6 addresses, since there are more of
  22115. them and we can't run out. To override this behavior and make IPv4
  22116. addresses preferred, set NoPreferIPv6Automap on whatever SOCKSPort
  22117. or DNSPort you're using for resolving. Implements ticket 7571.
  22118. - AutomapHostsOnResolve responses are now randomized, to avoid
  22119. annoying situations where Tor is restarted and applications
  22120. connect to the wrong addresses.
  22121. - Never try more than 1000 times to pick a new virtual address when
  22122. AutomapHostsOnResolve is set. That's good enough so long as we
  22123. aren't close to handing out our entire virtual address space;
  22124. if you're getting there, it's best to switch to IPv6 virtual
  22125. addresses anyway.
  22126. o Minor bugfixes:
  22127. - The ADDRMAP command can no longer generate an ill-formed error
  22128. code on a failed MAPADDRESS. It now says "internal" rather than
  22129. an English sentence fragment with spaces in the middle. Bugfix on
  22130. Tor 0.2.0.19-alpha.
  22131. - Fix log messages and comments to avoid saying "GMT" when we mean
  22132. "UTC". Fixes bug 6113.
  22133. - Compile on win64 using mingw64. Fixes bug 7260; patches from
  22134. "yayooo".
  22135. - Fix a crash when debugging unit tests on Windows: deallocate a
  22136. shared library with FreeLibrary, not CloseHandle. Fixes bug 7306;
  22137. bugfix on 0.2.2.17-alpha. Reported by "ultramage".
  22138. o Renamed options:
  22139. - The DirServer option is now DirAuthority, for consistency with
  22140. current naming patterns. You can still use the old DirServer form.
  22141. o Code simplification and refactoring:
  22142. - Move the client-side address-map/virtual-address/DNS-cache code
  22143. out of connection_edge.c into a new addressmap.c module.
  22144. - Remove unused code for parsing v1 directories and "running routers"
  22145. documents. Fixes bug 6887.
  22146. Changes in version 0.2.3.25 - 2012-11-19
  22147. The Tor 0.2.3 release series is dedicated to the memory of Len "rabbi"
  22148. Sassaman (1980-2011), a long-time cypherpunk, anonymity researcher,
  22149. Mixmaster maintainer, Pynchon Gate co-designer, CodeCon organizer,
  22150. programmer, and friend. Unstinting in his dedication to the cause of
  22151. freedom, he inspired and helped many of us as we began our work on
  22152. anonymity, and inspires us still. Please honor his memory by writing
  22153. software to protect people's freedoms, and by helping others to do so.
  22154. Tor 0.2.3.25, the first stable release in the 0.2.3 branch, features
  22155. significantly reduced directory overhead (via microdescriptors),
  22156. enormous crypto performance improvements for fast relays on new
  22157. enough hardware, a new v3 TLS handshake protocol that can better
  22158. resist fingerprinting, support for protocol obfuscation plugins (aka
  22159. pluggable transports), better scalability for hidden services, IPv6
  22160. support for bridges, performance improvements like allowing clients
  22161. to skip the first round-trip on the circuit ("optimistic data") and
  22162. refilling token buckets more often, a new "stream isolation" design
  22163. to isolate different applications on different circuits, and many
  22164. stability, security, and privacy fixes.
  22165. o Major bugfixes:
  22166. - Tor tries to wipe potentially sensitive data after using it, so
  22167. that if some subsequent security failure exposes Tor's memory,
  22168. the damage will be limited. But we had a bug where the compiler
  22169. was eliminating these wipe operations when it decided that the
  22170. memory was no longer visible to a (correctly running) program,
  22171. hence defeating our attempt at defense in depth. We fix that
  22172. by using OpenSSL's OPENSSL_cleanse() operation, which a compiler
  22173. is unlikely to optimize away. Future versions of Tor may use
  22174. a less ridiculously heavy approach for this. Fixes bug 7352.
  22175. Reported in an article by Andrey Karpov.
  22176. o Minor bugfixes:
  22177. - Fix a harmless bug when opting against publishing a relay descriptor
  22178. because DisableNetwork is set. Fixes bug 7464; bugfix on
  22179. 0.2.3.9-alpha.
  22180. Changes in version 0.2.4.6-alpha - 2012-11-13
  22181. Tor 0.2.4.6-alpha fixes an assert bug that has been plaguing relays,
  22182. makes our defense-in-depth memory wiping more reliable, and begins to
  22183. count IPv6 addresses in bridge statistics,
  22184. o Major bugfixes:
  22185. - Fix an assertion failure that could occur when closing a connection
  22186. with a spliced rendezvous circuit. Fix for bug 7212; bugfix on
  22187. Tor 0.2.4.4-alpha.
  22188. - Tor tries to wipe potentially sensitive data after using it, so
  22189. that if some subsequent security failure exposes Tor's memory,
  22190. the damage will be limited. But we had a bug where the compiler
  22191. was eliminating these wipe operations when it decided that the
  22192. memory was no longer visible to a (correctly running) program,
  22193. hence defeating our attempt at defense in depth. We fix that
  22194. by using OpenSSL's OPENSSL_cleanse() operation, which a compiler
  22195. is unlikely to optimize away. Future versions of Tor may use
  22196. a less ridiculously heavy approach for this. Fixes bug 7352.
  22197. Reported in an article by Andrey Karpov.
  22198. o Minor features:
  22199. - Add GeoIP database for IPv6 addresses. The new config option
  22200. is GeoIPv6File.
  22201. - Bridge statistics now count bridge clients connecting over IPv6:
  22202. bridge statistics files now list "bridge-ip-versions" and
  22203. extra-info documents list "geoip6-db-digest". The control protocol
  22204. "CLIENTS_SEEN" and "ip-to-country" queries now support IPv6. Initial
  22205. implementation by "shkoo", addressing ticket 5055.
  22206. o Minor bugfixes:
  22207. - Warn when we are binding low ports when hibernation is enabled;
  22208. previously we had warned when we were _advertising_ low ports with
  22209. hibernation enabled. Fixes bug 7285; bugfix on 0.2.3.9-alpha.
  22210. - Fix a harmless bug when opting against publishing a relay descriptor
  22211. because DisableNetwork is set. Fixes bug 7464; bugfix on
  22212. 0.2.3.9-alpha.
  22213. - Add warning message when a managed proxy dies during configuration.
  22214. Fixes bug 7195; bugfix on 0.2.4.2-alpha.
  22215. - Fix a linking error when building tor-fw-helper without miniupnp.
  22216. Fixes bug 7235; bugfix on 0.2.4.2-alpha. Fix by Anthony G. Basile.
  22217. - Check for closing an or_connection_t without going through correct
  22218. channel functions; emit a warning and then call
  22219. connection_or_close_for_error() so we don't assert as in bugs 7212
  22220. and 7267.
  22221. - Compile correctly on compilers without C99 designated initializer
  22222. support. Fixes bug 7286; bugfix on 0.2.4.4-alpha.
  22223. - Avoid a possible assert that can occur when channel_send_destroy() is
  22224. called on a channel in CHANNEL_STATE_CLOSING, CHANNEL_STATE_CLOSED,
  22225. or CHANNEL_STATE_ERROR when the Tor process is resumed after being
  22226. blocked for a long interval. Fixes bug 7350; bugfix on 0.2.4.4-alpha.
  22227. - Fix a memory leak on failing cases of channel_tls_process_certs_cell.
  22228. Fixes bug 7422; bugfix on 0.2.4.4-alpha.
  22229. o Code simplification and refactoring:
  22230. - Start using OpenBSD's implementation of queue.h, so that we don't
  22231. need to hand-roll our own pointer and list structures whenever we
  22232. need them. (We can't rely on a sys/queue.h, since some operating
  22233. systems don't have them, and the ones that do have them don't all
  22234. present the same extensions.)
  22235. Changes in version 0.2.4.5-alpha - 2012-10-25
  22236. Tor 0.2.4.5-alpha comes hard at the heels of 0.2.4.4-alpha, to fix
  22237. two important security vulnerabilities that could lead to remotely
  22238. triggerable relay crashes, fix a major bug that was preventing clients
  22239. from choosing suitable exit nodes, and refactor some of our code.
  22240. o Major bugfixes (security, also in 0.2.3.24-rc):
  22241. - Fix a group of remotely triggerable assertion failures related to
  22242. incorrect link protocol negotiation. Found, diagnosed, and fixed
  22243. by "some guy from France". Fix for CVE-2012-2250; bugfix on
  22244. 0.2.3.6-alpha.
  22245. - Fix a denial of service attack by which any directory authority
  22246. could crash all the others, or by which a single v2 directory
  22247. authority could crash everybody downloading v2 directory
  22248. information. Fixes bug 7191; bugfix on 0.2.0.10-alpha.
  22249. o Major bugfixes (also in 0.2.3.24-rc):
  22250. - When parsing exit policy summaries from microdescriptors, we had
  22251. previously been ignoring the last character in each one, so that
  22252. "accept 80,443,8080" would be treated by clients as indicating
  22253. a node that allows access to ports 80, 443, and 808. That would
  22254. lead to clients attempting connections that could never work,
  22255. and ignoring exit nodes that would support their connections. Now
  22256. clients parse these exit policy summaries correctly. Fixes bug 7192;
  22257. bugfix on 0.2.3.1-alpha.
  22258. o Minor bugfixes (also in 0.2.3.24-rc):
  22259. - Clients now consider the ClientRejectInternalAddresses config option
  22260. when using a microdescriptor consensus stanza to decide whether
  22261. an exit relay would allow exiting to an internal address. Fixes
  22262. bug 7190; bugfix on 0.2.3.1-alpha.
  22263. o Minor bugfixes:
  22264. - Only disable TLS session ticket support when running as a TLS
  22265. server. Now clients will blend better with regular Firefox
  22266. connections. Fixes bug 7189; bugfix on Tor 0.2.3.23-rc.
  22267. o Code simplification and refactoring:
  22268. - Start using OpenBSD's implementation of queue.h (originally by
  22269. Niels Provos).
  22270. - Move the entry node code from circuitbuild.c to its own file.
  22271. - Move the circuit build timeout tracking code from circuitbuild.c
  22272. to its own file.
  22273. Changes in version 0.2.3.24-rc - 2012-10-25
  22274. Tor 0.2.3.24-rc fixes two important security vulnerabilities that
  22275. could lead to remotely triggerable relay crashes, and fixes
  22276. a major bug that was preventing clients from choosing suitable exit
  22277. nodes.
  22278. o Major bugfixes (security):
  22279. - Fix a group of remotely triggerable assertion failures related to
  22280. incorrect link protocol negotiation. Found, diagnosed, and fixed
  22281. by "some guy from France". Fix for CVE-2012-2250; bugfix on
  22282. 0.2.3.6-alpha.
  22283. - Fix a denial of service attack by which any directory authority
  22284. could crash all the others, or by which a single v2 directory
  22285. authority could crash everybody downloading v2 directory
  22286. information. Fixes bug 7191; bugfix on 0.2.0.10-alpha.
  22287. o Major bugfixes:
  22288. - When parsing exit policy summaries from microdescriptors, we had
  22289. previously been ignoring the last character in each one, so that
  22290. "accept 80,443,8080" would be treated by clients as indicating
  22291. a node that allows access to ports 80, 443, and 808. That would
  22292. lead to clients attempting connections that could never work,
  22293. and ignoring exit nodes that would support their connections. Now
  22294. clients parse these exit policy summaries correctly. Fixes bug 7192;
  22295. bugfix on 0.2.3.1-alpha.
  22296. o Minor bugfixes:
  22297. - Clients now consider the ClientRejectInternalAddresses config option
  22298. when using a microdescriptor consensus stanza to decide whether
  22299. an exit relay would allow exiting to an internal address. Fixes
  22300. bug 7190; bugfix on 0.2.3.1-alpha.
  22301. Changes in version 0.2.4.4-alpha - 2012-10-20
  22302. Tor 0.2.4.4-alpha adds a new v3 directory authority, fixes a privacy
  22303. vulnerability introduced by a change in OpenSSL, fixes a remotely
  22304. triggerable assert, and adds new channel_t and circuitmux_t abstractions
  22305. that will make it easier to test new connection transport and cell
  22306. scheduling algorithms.
  22307. o New directory authorities (also in 0.2.3.23-rc):
  22308. - Add Faravahar (run by Sina Rabbani) as the ninth v3 directory
  22309. authority. Closes ticket 5749.
  22310. o Major bugfixes (security/privacy, also in 0.2.3.23-rc):
  22311. - Disable TLS session tickets. OpenSSL's implementation was giving
  22312. our TLS session keys the lifetime of our TLS context objects, when
  22313. perfect forward secrecy would want us to discard anything that
  22314. could decrypt a link connection as soon as the link connection
  22315. was closed. Fixes bug 7139; bugfix on all versions of Tor linked
  22316. against OpenSSL 1.0.0 or later. Found by Florent Daignière.
  22317. - Discard extraneous renegotiation attempts once the V3 link
  22318. protocol has been initiated. Failure to do so left us open to
  22319. a remotely triggerable assertion failure. Fixes CVE-2012-2249;
  22320. bugfix on 0.2.3.6-alpha. Reported by "some guy from France".
  22321. o Internal abstraction features:
  22322. - Introduce new channel_t abstraction between circuits and
  22323. or_connection_t to allow for implementing alternate OR-to-OR
  22324. transports. A channel_t is an abstract object which can either be a
  22325. cell-bearing channel, which is responsible for authenticating and
  22326. handshaking with the remote OR and transmitting cells to and from
  22327. it, or a listening channel, which spawns new cell-bearing channels
  22328. at the request of remote ORs. Implements part of ticket 6465.
  22329. - Also new is the channel_tls_t subclass of channel_t, adapting it
  22330. to the existing or_connection_t code. The V2/V3 protocol handshaking
  22331. code which formerly resided in command.c has been moved below the
  22332. channel_t abstraction layer and may be found in channeltls.c now.
  22333. Implements the rest of ticket 6465.
  22334. - Introduce new circuitmux_t storing the queue of circuits for
  22335. a channel; this encapsulates and abstracts the queue logic and
  22336. circuit selection policy, and allows the latter to be overridden
  22337. easily by switching out a policy object. The existing EWMA behavior
  22338. is now implemented as a circuitmux_policy_t. Resolves ticket 6816.
  22339. o Required libraries:
  22340. - Tor now requires OpenSSL 0.9.8 or later. OpenSSL 1.0.0 or later is
  22341. strongly recommended.
  22342. o Minor features:
  22343. - Warn users who run hidden services on a Tor client with
  22344. UseEntryGuards disabled that their hidden services will be
  22345. vulnerable to http://freehaven.net/anonbib/#hs-attack06 (the
  22346. attack which motivated Tor to support entry guards in the first
  22347. place). Resolves ticket 6889.
  22348. - Tor now builds correctly on Bitrig, an OpenBSD fork. Patch from
  22349. dhill. Resolves ticket 6982.
  22350. - Option OutboundBindAddress can be specified multiple times and
  22351. accepts IPv6 addresses. Resolves ticket 6876.
  22352. o Minor bugfixes (also in 0.2.3.23-rc):
  22353. - Don't serve or accept v2 hidden service descriptors over a
  22354. relay's DirPort. It's never correct to do so, and disabling it
  22355. might make it more annoying to exploit any bugs that turn up in the
  22356. descriptor-parsing code. Fixes bug 7149.
  22357. - Fix two cases in src/or/transports.c where we were calling
  22358. fmt_addr() twice in a parameter list. Bug found by David
  22359. Fifield. Fixes bug 7014; bugfix on 0.2.3.9-alpha.
  22360. - Fix memory leaks whenever we logged any message about the "path
  22361. bias" detection. Fixes bug 7022; bugfix on 0.2.3.21-rc.
  22362. - When relays refuse a "create" cell because their queue of pending
  22363. create cells is too big (typically because their cpu can't keep up
  22364. with the arrival rate), send back reason "resource limit" rather
  22365. than reason "internal", so network measurement scripts can get a
  22366. more accurate picture. Fixes bug 7037; bugfix on 0.1.1.11-alpha.
  22367. o Minor bugfixes:
  22368. - Command-line option "--version" implies "--quiet". Fixes bug 6997.
  22369. - Free some more still-in-use memory at exit, to make hunting for
  22370. memory leaks easier. Resolves bug 7029.
  22371. - When a Tor client gets a "truncated" relay cell, the first byte of
  22372. its payload specifies why the circuit was truncated. We were
  22373. ignoring this 'reason' byte when tearing down the circuit, resulting
  22374. in the controller not being told why the circuit closed. Now we
  22375. pass the reason from the truncated cell to the controller. Bugfix
  22376. on 0.1.2.3-alpha; fixes bug 7039.
  22377. - Downgrade "Failed to hand off onionskin" messages to "debug"
  22378. severity, since they're typically redundant with the "Your computer
  22379. is too slow" messages. Fixes bug 7038; bugfix on 0.2.2.16-alpha.
  22380. - Make clients running with IPv6 bridges connect over IPv6 again,
  22381. even without setting new config options ClientUseIPv6 and
  22382. ClientPreferIPv6ORPort. Fixes bug 6757; bugfix on 0.2.4.1-alpha.
  22383. - Use square brackets around IPv6 addresses in numerous places
  22384. that needed them, including log messages, HTTPS CONNECT proxy
  22385. requests, TransportProxy statefile entries, and pluggable transport
  22386. extra-info lines. Fixes bug 7011; patch by David Fifield.
  22387. o Code refactoring and cleanup:
  22388. - Source files taken from other packages now reside in src/ext;
  22389. previously they were scattered around the rest of Tor.
  22390. - Avoid use of reserved identifiers in our C code. The C standard
  22391. doesn't like us declaring anything that starts with an
  22392. underscore, so let's knock it off before we get in trouble. Fix
  22393. for bug 1031; bugfix on the first Tor commit.
  22394. Changes in version 0.2.3.23-rc - 2012-10-20
  22395. Tor 0.2.3.23-rc adds a new v3 directory authority, fixes a privacy
  22396. vulnerability introduced by a change in OpenSSL, and fixes a variety
  22397. of smaller bugs in preparation for the release.
  22398. o New directory authorities:
  22399. - Add Faravahar (run by Sina Rabbani) as the ninth v3 directory
  22400. authority. Closes ticket 5749.
  22401. o Major bugfixes (security/privacy):
  22402. - Disable TLS session tickets. OpenSSL's implementation was giving
  22403. our TLS session keys the lifetime of our TLS context objects, when
  22404. perfect forward secrecy would want us to discard anything that
  22405. could decrypt a link connection as soon as the link connection
  22406. was closed. Fixes bug 7139; bugfix on all versions of Tor linked
  22407. against OpenSSL 1.0.0 or later. Found by Florent Daignière.
  22408. - Discard extraneous renegotiation attempts once the V3 link
  22409. protocol has been initiated. Failure to do so left us open to
  22410. a remotely triggerable assertion failure. Fixes CVE-2012-2249;
  22411. bugfix on 0.2.3.6-alpha. Reported by "some guy from France".
  22412. o Major bugfixes:
  22413. - Fix a possible crash bug when checking for deactivated circuits
  22414. in connection_or_flush_from_first_active_circuit(). Fixes bug 6341;
  22415. bugfix on 0.2.2.7-alpha. Bug report and fix received pseudonymously.
  22416. o Minor bugfixes (on 0.2.3.x):
  22417. - Fix two cases in src/or/transports.c where we were calling
  22418. fmt_addr() twice in a parameter list. Bug found by David
  22419. Fifield. Fixes bug 7014; bugfix on 0.2.3.9-alpha.
  22420. - Convert an assert in the pathbias code to a log message. The assert
  22421. appears to only be triggerable by Tor2Web mode. Fixes bug 6866;
  22422. bugfix on 0.2.3.17-beta.
  22423. - Fix memory leaks whenever we logged any message about the "path
  22424. bias" detection. Fixes bug 7022; bugfix on 0.2.3.21-rc.
  22425. o Minor bugfixes (on 0.2.2.x and earlier):
  22426. - Don't serve or accept v2 hidden service descriptors over a relay's
  22427. DirPort. It's never correct to do so, and disabling it might
  22428. make it more annoying to exploit any bugs that turn up in the
  22429. descriptor-parsing code. Fixes bug 7149.
  22430. - When relays refuse a "create" cell because their queue of pending
  22431. create cells is too big (typically because their cpu can't keep up
  22432. with the arrival rate), send back reason "resource limit" rather
  22433. than reason "internal", so network measurement scripts can get a
  22434. more accurate picture. Bugfix on 0.1.1.11-alpha; fixes bug 7037.
  22435. - Correct file sizes when reading binary files on Cygwin, to avoid
  22436. a bug where Tor would fail to read its state file. Fixes bug 6844;
  22437. bugfix on 0.1.2.7-alpha.
  22438. - Avoid undefined behavior when parsing the list of supported
  22439. rendezvous/introduction protocols in a hidden service descriptor.
  22440. Previously, Tor would have confused (as-yet-unused) protocol version
  22441. numbers greater than 32 with lower ones on many platforms. Fixes
  22442. bug 6827; bugfix on 0.2.0.10-alpha. Found by George Kadianakis.
  22443. o Documentation fixes:
  22444. - Clarify that hidden services are TCP only. Fixes bug 6024.
  22445. Changes in version 0.2.4.3-alpha - 2012-09-22
  22446. Tor 0.2.4.3-alpha fixes another opportunity for a remotely triggerable
  22447. assertion, resumes letting relays test reachability of their DirPort,
  22448. and cleans up a bunch of smaller bugs.
  22449. o Security fixes:
  22450. - Fix an assertion failure in tor_timegm() that could be triggered
  22451. by a badly formatted directory object. Bug found by fuzzing with
  22452. Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
  22453. o Major bugfixes:
  22454. - Fix a possible crash bug when checking for deactivated circuits
  22455. in connection_or_flush_from_first_active_circuit(). Fixes bug 6341;
  22456. bugfix on 0.2.2.7-alpha. Bug report and fix received pseudonymously.
  22457. - Allow routers to detect that their own DirPorts are running. When
  22458. we removed support for versions_supports_begindir, we also
  22459. accidentally removed the mechanism we used to self-test our
  22460. DirPort. Diagnosed with help from kargig. Fixes bugs 6814 and 6815;
  22461. bugfix on 0.2.4.2-alpha.
  22462. o Security features:
  22463. - Switch to a completely time-invariant approach for picking nodes
  22464. weighted by bandwidth. Our old approach would run through the
  22465. part of the loop after it had made its choice slightly slower
  22466. than it ran through the part of the loop before it had made its
  22467. choice. Addresses ticket 6538.
  22468. - Disable the use of Guard nodes when in Tor2WebMode. Guard usage
  22469. by tor2web clients allows hidden services to identify tor2web
  22470. clients through their repeated selection of the same rendezvous
  22471. and introduction point circuit endpoints (their guards). Resolves
  22472. ticket 6888.
  22473. o Minor features:
  22474. - Enable Tor to read configuration, state, and key information from
  22475. a FIFO. Previously Tor would only read from files with a positive
  22476. stat.st_size. Code from meejah; fixes bug 6044.
  22477. o Minor bugfixes:
  22478. - Correct file sizes when reading binary files on Cygwin, to avoid
  22479. a bug where Tor would fail to read its state file. Fixes bug 6844;
  22480. bugfix on 0.1.2.7-alpha.
  22481. - Correctly handle votes with more than 31 flags. Fixes bug 6853;
  22482. bugfix on 0.2.0.3-alpha.
  22483. - When complaining about a client port on a public address, log
  22484. which address we're complaining about. Fixes bug 4020; bugfix on
  22485. 0.2.3.3-alpha. Patch by Tom Fitzhenry.
  22486. - Convert an assert in the pathbias code to a log message. The assert
  22487. appears to only be triggerable by Tor2Web mode. Fixes bug 6866;
  22488. bugfix on 0.2.3.17-beta.
  22489. - Our new buildsystem was overzealous about rebuilding manpages: it
  22490. would rebuild them all whenever any one of them changed. Now our
  22491. dependency checking should be correct. Fixes bug 6843; bugfix on
  22492. 0.2.4.1-alpha.
  22493. - Don't do reachability testing over IPv6 unless AuthDirPublishIPv6
  22494. is set. Fixes bug 6880. Bugfix on 0.2.4.1-alpha.
  22495. - Correct log printout about which address family is preferred
  22496. when connecting to a bridge with both an IPv4 and IPv6 OR port.
  22497. Fixes bug 6884; bugfix on 0.2.4.1-alpha.
  22498. o Minor bugfixes (code cleanliness):
  22499. - Fix round_to_power_of_2() so it doesn't invoke undefined behavior
  22500. with large values. This situation was untriggered, but nevertheless
  22501. incorrect. Fixes bug 6831; bugfix on 0.2.0.1-alpha.
  22502. - Reject consensus votes with more than 64 known-flags. We aren't even
  22503. close to that limit yet, and our code doesn't handle it correctly.
  22504. Fixes bug 6833; bugfix on 0.2.0.1-alpha.
  22505. - Avoid undefined behavior when parsing the list of supported
  22506. rendezvous/introduction protocols in a hidden service descriptor.
  22507. Previously, Tor would have confused (as-yet-unused) protocol version
  22508. numbers greater than 32 with lower ones on many platforms. Fixes
  22509. bug 6827; bugfix on 0.2.0.10-alpha. Found by George Kadianakis.
  22510. - Fix handling of rendezvous client authorization types over 8.
  22511. Fixes bug 6861; bugfix on 0.2.1.5-alpha.
  22512. - Fix building with older versions of GCC (2.95, for one) that don't
  22513. like preprocessor directives inside macro arguments. Found by
  22514. grarpamp. Fixes bug 6842; bugfix on 0.2.4.2-alpha.
  22515. - Switch weighted node selection rule from using a list of doubles
  22516. to using a list of int64_t. This change should make the process
  22517. slightly easier to debug and maintain. Needed to finish ticket 6538.
  22518. o Code simplification and refactoring:
  22519. - Move the generic "config" code into a new file, and have "config.c"
  22520. hold only torrc- and state-related code. Resolves ticket 6823.
  22521. - Move the core of our "choose a weighted element at random" logic
  22522. into its own function, and give it unit tests. Now the logic is
  22523. testable, and a little less fragile too.
  22524. - Removed the testing_since field of node_t, which hasn't been used
  22525. for anything since 0.2.0.9-alpha.
  22526. o Documentation fixes:
  22527. - Clarify that hidden services are TCP only. Fixes bug 6024.
  22528. - Resolve a typo in torrc.sample.in. Fixes bug 6819; bugfix on
  22529. 0.2.3.14-alpha.
  22530. Changes in version 0.2.3.22-rc - 2012-09-11
  22531. Tor 0.2.3.22-rc fixes another opportunity for a remotely triggerable
  22532. assertion.
  22533. o Security fixes:
  22534. - Fix an assertion failure in tor_timegm() that could be triggered
  22535. by a badly formatted directory object. Bug found by fuzzing with
  22536. Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
  22537. o Minor bugfixes:
  22538. - Avoid segfault when starting up having run with an extremely old
  22539. version of Tor and parsing its state file. Fixes bug 6801; bugfix
  22540. on 0.2.2.23-alpha.
  22541. Changes in version 0.2.2.39 - 2012-09-11
  22542. Tor 0.2.2.39 fixes two more opportunities for remotely triggerable
  22543. assertions.
  22544. o Security fixes:
  22545. - Fix an assertion failure in tor_timegm() that could be triggered
  22546. by a badly formatted directory object. Bug found by fuzzing with
  22547. Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
  22548. - Do not crash when comparing an address with port value 0 to an
  22549. address policy. This bug could have been used to cause a remote
  22550. assertion failure by or against directory authorities, or to
  22551. allow some applications to crash clients. Fixes bug 6690; bugfix
  22552. on 0.2.1.10-alpha.
  22553. Changes in version 0.2.4.2-alpha - 2012-09-10
  22554. Tor 0.2.4.2-alpha enables port forwarding for pluggable transports,
  22555. raises the default rate limiting even more, and makes the bootstrapping
  22556. log messages less noisy.
  22557. o Major features:
  22558. - Automatically forward the TCP ports of pluggable transport
  22559. proxies using tor-fw-helper if PortForwarding is enabled. Implements
  22560. ticket 4567.
  22561. o Major bugfixes:
  22562. - Raise the default BandwidthRate/BandwidthBurst values from 5MB/10MB
  22563. to 1GB/1GB. The previous defaults were intended to be "basically
  22564. infinite", but it turns out they're now limiting our 100mbit+
  22565. relays and bridges. Fixes bug 6605; bugfix on 0.2.0.10-alpha (the
  22566. last time we raised it).
  22567. o Minor features:
  22568. - Detect when we're running with a version of OpenSSL other than the
  22569. one we compiled with. This has occasionally given people hard-to-
  22570. track-down errors.
  22571. - Log fewer lines at level "notice" about our OpenSSL and Libevent
  22572. versions and capabilities when everything is going right. Resolves
  22573. part of ticket 6736.
  22574. - Directory authorities no long accept descriptors for any version of
  22575. Tor before 0.2.2.35, or for any 0.2.3 release before 0.2.3.10-alpha.
  22576. These versions are insecure, unsupported, or both. Implements
  22577. ticket 6789.
  22578. o Minor bugfixes:
  22579. - Rename the (internal-use-only) UsingTestingNetworkDefaults option
  22580. to start with a triple-underscore so the controller won't touch it.
  22581. Patch by Meejah. Fixes bug 3155. Bugfix on 0.2.2.23-alpha.
  22582. - Avoid segfault when starting up having run with an extremely old
  22583. version of Tor and parsing its state file. Fixes bug 6801; bugfix
  22584. on 0.2.2.23-alpha.
  22585. - Rename the (testing-use-only) _UseFilteringSSLBufferevents option
  22586. so it doesn't start with _. Fixes bug 3155. Bugfix on 0.2.3.1-alpha.
  22587. - Don't follow the NULL pointer if microdescriptor generation fails.
  22588. (This does not appear to be triggerable, but it's best to be safe.)
  22589. Found by "f. tp.". Fixes bug 6797; bugfix on 0.2.4.1-alpha.
  22590. - Fix mis-declared dependencies on src/common/crypto.c and
  22591. src/or/tor_main.c that could break out-of-tree builds under some
  22592. circumstances. Fixes bug 6778; bugfix on 0.2.4.1-alpha.
  22593. - Avoid a warning when building common_sha1.i out of tree. Fixes bug
  22594. 6778; bugfix on 0.2.4.1-alpha.
  22595. - Fix a harmless (in this case) build warning for implicitly
  22596. converting a strlen() to an int. Bugfix on 0.2.4.1-alpha.
  22597. o Removed features:
  22598. - Now that all versions before 0.2.2.x are disallowed, we no longer
  22599. need to work around their missing features. Thus we can remove a
  22600. bunch of compatibility code.
  22601. o Code refactoring:
  22602. - Tweak tor-fw-helper to accept an arbitrary amount of arbitrary
  22603. TCP ports to forward. In the past it only accepted two ports:
  22604. the ORPort and the DirPort.
  22605. Changes in version 0.2.4.1-alpha - 2012-09-05
  22606. Tor 0.2.4.1-alpha lets bridges publish their pluggable transports to
  22607. bridgedb; lets relays use IPv6 addresses and directory authorities
  22608. advertise them; and switches to a cleaner build interface.
  22609. This is the first alpha release in a new series, so expect there to
  22610. be bugs. Users who would rather test out a more stable branch should
  22611. stay with 0.2.3.x for now.
  22612. o Major features (bridges):
  22613. - Bridges now report the pluggable transports they support to the
  22614. bridge authority, so it can pass the supported transports on to
  22615. bridgedb and/or eventually do reachability testing. Implements
  22616. ticket 3589.
  22617. o Major features (IPv6):
  22618. - Bridge authorities now accept IPv6 bridge addresses and include
  22619. them in network status documents. Implements ticket 5534.
  22620. - Clients who set "ClientUseIPv6 1" may connect to entry nodes over
  22621. IPv6. Set "ClientPreferIPv6ORPort 1" to make this even more likely
  22622. to happen. Implements ticket 5535.
  22623. - All kind of relays, not just bridges, can now advertise an IPv6
  22624. OR port. Implements ticket 6362.
  22625. - Directory authorities vote on IPv6 OR ports using the new consensus
  22626. method 14. Implements ticket 6363.
  22627. o Major features (build):
  22628. - Switch to a nonrecursive Makefile structure. Now instead of each
  22629. Makefile.am invoking other Makefile.am's, there is a master
  22630. Makefile.am that includes the others. This change makes our build
  22631. process slightly more maintainable, and improves parallelism for
  22632. building with make -j. Original patch by Stewart Smith; various
  22633. fixes by Jim Meyering.
  22634. - Where available, we now use automake's "silent" make rules by
  22635. default, so that warnings are easier to spot. You can get the old
  22636. behavior with "make V=1". Patch by Stewart Smith for ticket 6522.
  22637. o Minor features (code security and spec conformance):
  22638. - Clear keys and key-derived material left on the stack in
  22639. rendservice.c and rendclient.c. Check return value of
  22640. crypto_pk_write_private_key_to_string() in rend_service_load_keys().
  22641. These fixes should make us more forward-secure against cold-boot
  22642. attacks and the like. Fixes bug 2385.
  22643. - Reject EXTEND cells sent to nonexistent streams. According to the
  22644. spec, an EXTEND cell sent to _any_ nonzero stream ID is invalid, but
  22645. we were only checking for stream IDs that were currently in use.
  22646. Found while hunting for more instances of bug 6271. Bugfix on
  22647. 0.0.2pre8, which introduced incremental circuit construction.
  22648. o Minor features (streamlining);
  22649. - No longer include the "opt" prefix when generating routerinfos
  22650. or v2 directories: it has been needless since Tor 0.1.2. Closes
  22651. ticket 5124.
  22652. - Remove some now-needless code that tried to aggressively flush
  22653. OR connections as data was added to them. Since 0.2.0.1-alpha, our
  22654. cell queue logic has saved us from the failure mode that this code
  22655. was supposed to prevent. Removing this code will limit the number
  22656. of baroque control flow paths through Tor's network logic. Reported
  22657. pseudonymously on IRC. Fixes bug 6468; bugfix on 0.2.0.1-alpha.
  22658. o Minor features (controller):
  22659. - Add a "GETINFO signal/names" control port command. Implements
  22660. ticket 3842.
  22661. - Provide default values for all options via "GETINFO config/defaults".
  22662. Implements ticket 4971.
  22663. o Minor features (IPv6):
  22664. - New config option "AuthDirHasIPv6Connectivity 1" that directory
  22665. authorities should set if they have IPv6 connectivity and want to
  22666. do reachability tests for IPv6 relays. Implements feature 5974.
  22667. - A relay with an IPv6 OR port now sends that address in NETINFO
  22668. cells (in addition to its other address). Implements ticket 6364.
  22669. o Minor features (log messages):
  22670. - Omit the first heartbeat log message, because it never has anything
  22671. useful to say, and it clutters up the bootstrapping messages.
  22672. Resolves ticket 6758.
  22673. - Don't log about reloading the microdescriptor cache at startup. Our
  22674. bootstrap warnings are supposed to tell the user when there's a
  22675. problem, and our bootstrap notices say when there isn't. Resolves
  22676. ticket 6759; bugfix on 0.2.2.6-alpha.
  22677. - Don't log "I learned some more directory information" when we're
  22678. reading cached directory information. Reserve it for when new
  22679. directory information arrives in response to a fetch. Resolves
  22680. ticket 6760.
  22681. - Prevent rounding error in path bias counts when scaling
  22682. them down, and use the correct scale factor default. Also demote
  22683. some path bias related log messages down a level and make others
  22684. less scary sounding. Fixes bug 6647. Bugfix against 0.2.3.17-beta.
  22685. - We no longer warn so much when generating manpages from their
  22686. asciidoc source.
  22687. o Code simplifications and refactoring:
  22688. - Enhance our internal sscanf replacement so that we can eliminate
  22689. the last remaining uses of the system sscanf. (Though those uses
  22690. of sscanf were safe, sscanf itself is generally error prone, so
  22691. we want to eliminate when we can.) Fixes ticket 4195 and Coverity
  22692. CID 448.
  22693. - Move ipv6_preferred from routerinfo_t to node_t. Addresses bug 4620.
  22694. - Move last_reachable and testing_since from routerinfo_t to node_t.
  22695. Implements ticket 5529.
  22696. - Add replaycache_t structure, functions and unit tests, then refactor
  22697. rend_service_introduce() to be more clear to read, improve, debug,
  22698. and test. Resolves bug 6177.
  22699. - Finally remove support for malloc_good_size and malloc_usable_size.
  22700. We had hoped that these functions would let us eke a little more
  22701. memory out of our malloc implementation. Unfortunately, the only
  22702. implementations that provided these functions are also ones that
  22703. are already efficient about not overallocation: they never got us
  22704. more than 7 or so bytes per allocation. Removing them saves us a
  22705. little code complexity and a nontrivial amount of build complexity.
  22706. o New requirements:
  22707. - Tor maintainers now require Automake version 1.9 or later to build
  22708. Tor from the Git repository. (Automake is not required when building
  22709. from a source distribution.)
  22710. Changes in version 0.2.3.21-rc - 2012-09-05
  22711. Tor 0.2.3.21-rc is the fourth release candidate for the Tor 0.2.3.x
  22712. series. It fixes a trio of potential security bugs, fixes a bug where
  22713. we were leaving some of the fast relays out of the microdescriptor
  22714. consensus, resumes interpreting "ORPort 0" and "DirPort 0" correctly,
  22715. and cleans up other smaller issues.
  22716. o Major bugfixes (security):
  22717. - Tear down the circuit if we get an unexpected SENDME cell. Clients
  22718. could use this trick to make their circuits receive cells faster
  22719. than our flow control would have allowed, or to gum up the network,
  22720. or possibly to do targeted memory denial-of-service attacks on
  22721. entry nodes. Fixes bug 6252. Bugfix on the 54th commit on Tor --
  22722. from July 2002, before the release of Tor 0.0.0. We had committed
  22723. this patch previously, but we had to revert it because of bug 6271.
  22724. Now that 6271 is fixed, this patch appears to work.
  22725. - Reject any attempt to extend to an internal address. Without
  22726. this fix, a router could be used to probe addresses on an internal
  22727. network to see whether they were accepting connections. Fixes bug
  22728. 6710; bugfix on 0.0.8pre1.
  22729. - Do not crash when comparing an address with port value 0 to an
  22730. address policy. This bug could have been used to cause a remote
  22731. assertion failure by or against directory authorities, or to
  22732. allow some applications to crash clients. Fixes bug 6690; bugfix
  22733. on 0.2.1.10-alpha.
  22734. o Major bugfixes:
  22735. - Remove the upper bound on microdescriptor length. We were hitting
  22736. the limit for routers with complex exit policies or family
  22737. declarations, causing clients to not use them. Fixes the first
  22738. piece of bug 6404; fix on 0.2.2.6-alpha.
  22739. - Detect "ORPort 0" as meaning, uniformly, that we're not running
  22740. as a relay. Previously, some of our code would treat the presence
  22741. of any ORPort line as meaning that we should act like a relay,
  22742. even though our new listener code would correctly not open any
  22743. ORPorts for ORPort 0. Similar bugs in other Port options are also
  22744. fixed. Fixes the first half of bug 6507; bugfix on 0.2.3.3-alpha.
  22745. o Minor bugfixes:
  22746. - Avoid a pair of double-free and use-after-mark bugs that can
  22747. occur with certain timings in canceled and re-received DNS
  22748. requests. Fixes bug 6472; bugfix on 0.0.7rc1.
  22749. - Fix build and 64-bit compile warnings from --enable-openbsd-malloc.
  22750. Fixes bug 6379. Bugfix on 0.2.0.20-rc.
  22751. - Allow one-hop directory fetching circuits the full "circuit build
  22752. timeout" period, rather than just half of it, before failing them
  22753. and marking the relay down. This fix should help reduce cases where
  22754. clients declare relays (or worse, bridges) unreachable because
  22755. the TLS handshake takes a few seconds to complete. Fixes bug 6743;
  22756. bugfix on 0.2.2.2-alpha, where we changed the timeout from a static
  22757. 30 seconds.
  22758. - Authorities no longer include any router in their microdescriptor
  22759. consensuses for which they couldn't generate or agree on a
  22760. microdescriptor. Fixes the second piece of bug 6404; fix on
  22761. 0.2.2.6-alpha.
  22762. - Detect and reject attempts to specify both "FooPort" and
  22763. "FooPort 0" in the same configuration domain. (It's still okay
  22764. to have a FooPort in your configuration file, and use "FooPort 0"
  22765. on the command line to disable it.) Fixes the second half of bug
  22766. 6507; bugfix on 0.2.3.3-alpha.
  22767. - Make wildcarded addresses (that is, ones beginning with "*.") work
  22768. when provided via the controller's MapAddress command. Previously,
  22769. they were accepted, but we never actually noticed that they were
  22770. wildcards. Fixes bug 6244; bugfix on 0.2.3.9-alpha.
  22771. - Avoid crashing on a malformed state file where EntryGuardPathBias
  22772. precedes EntryGuard. Fix for bug 6774; bugfix on 0.2.3.17-beta.
  22773. - Add a (probably redundant) memory clear between iterations of
  22774. the router status voting loop, to prevent future coding errors
  22775. where data might leak between iterations of the loop. Resolves
  22776. ticket 6514.
  22777. o Minor bugfixes (log messages):
  22778. - Downgrade "set buildtimeout to low value" messages to "info"
  22779. severity; they were never an actual problem, there was never
  22780. anything reasonable to do about them, and they tended to spam logs
  22781. from time to time. Fixes bug 6251; bugfix on 0.2.2.2-alpha.
  22782. - Downgrade path-bias warning messages to "info". We'll try to get
  22783. them working better in 0.2.4. Add internal circuit construction
  22784. state to protect against the noisy warn message "Unexpectedly high
  22785. circuit_successes". Also add some additional rate-limited notice
  22786. messages to help determine the root cause of the warn. Fixes bug
  22787. 6475. Bugfix against 0.2.3.17-beta.
  22788. - Move log message when unable to find a microdesc in a routerstatus
  22789. entry to parse time. Previously we'd spam this warning every time
  22790. we tried to figure out which microdescriptors to download. Fixes
  22791. the third piece of bug 6404; fix on 0.2.3.18-rc.
  22792. o Minor features:
  22793. - Consider new, removed or changed IPv6 OR ports a non-cosmetic
  22794. change when the authority is deciding whether to accept a newly
  22795. uploaded descriptor. Implements ticket 6423.
  22796. - Add missing documentation for consensus and microdesc files.
  22797. Resolves ticket 6732.
  22798. Changes in version 0.2.2.38 - 2012-08-12
  22799. Tor 0.2.2.38 fixes a remotely triggerable crash bug, and fixes a timing
  22800. attack that could in theory leak path information.
  22801. o Security fixes:
  22802. - Avoid an uninitialized memory read when reading a vote or consensus
  22803. document that has an unrecognized flavor name. This read could
  22804. lead to a remote crash bug. Fixes bug 6530; bugfix on 0.2.2.6-alpha.
  22805. - Try to leak less information about what relays a client is
  22806. choosing to a side-channel attacker. Previously, a Tor client would
  22807. stop iterating through the list of available relays as soon as it
  22808. had chosen one, thus finishing a little earlier when it picked
  22809. a router earlier in the list. If an attacker can recover this
  22810. timing information (nontrivial but not proven to be impossible),
  22811. they could learn some coarse-grained information about which relays
  22812. a client was picking (middle nodes in particular are likelier to
  22813. be affected than exits). The timing attack might be mitigated by
  22814. other factors (see bug 6537 for some discussion), but it's best
  22815. not to take chances. Fixes bug 6537; bugfix on 0.0.8rc1.
  22816. Changes in version 0.2.3.20-rc - 2012-08-05
  22817. Tor 0.2.3.20-rc is the third release candidate for the Tor 0.2.3.x
  22818. series. It fixes a pair of code security bugs and a potential anonymity
  22819. issue, updates our RPM spec files, and cleans up other smaller issues.
  22820. o Security fixes:
  22821. - Avoid read-from-freed-memory and double-free bugs that could occur
  22822. when a DNS request fails while launching it. Fixes bug 6480;
  22823. bugfix on 0.2.0.1-alpha.
  22824. - Avoid an uninitialized memory read when reading a vote or consensus
  22825. document that has an unrecognized flavor name. This read could
  22826. lead to a remote crash bug. Fixes bug 6530; bugfix on 0.2.2.6-alpha.
  22827. - Try to leak less information about what relays a client is
  22828. choosing to a side-channel attacker. Previously, a Tor client would
  22829. stop iterating through the list of available relays as soon as it
  22830. had chosen one, thus finishing a little earlier when it picked
  22831. a router earlier in the list. If an attacker can recover this
  22832. timing information (nontrivial but not proven to be impossible),
  22833. they could learn some coarse-grained information about which relays
  22834. a client was picking (middle nodes in particular are likelier to
  22835. be affected than exits). The timing attack might be mitigated by
  22836. other factors (see bug 6537 for some discussion), but it's best
  22837. not to take chances. Fixes bug 6537; bugfix on 0.0.8rc1.
  22838. o Minor features:
  22839. - Try to make the warning when giving an obsolete SOCKSListenAddress
  22840. a little more useful.
  22841. - Terminate active server managed proxies if Tor stops being a
  22842. relay. Addresses parts of bug 6274; bugfix on 0.2.3.6-alpha.
  22843. - Provide a better error message about possible OSX Asciidoc failure
  22844. reasons. Fixes bug 6436.
  22845. - Warn when Tor is configured to use accounting in a way that can
  22846. link a hidden service to some other hidden service or public
  22847. address. Resolves ticket 6490.
  22848. o Minor bugfixes:
  22849. - Check return value of fputs() when writing authority certificate
  22850. file. Fixes Coverity issue 709056; bugfix on 0.2.0.1-alpha.
  22851. - Ignore ServerTransportPlugin lines when Tor is not configured as
  22852. a relay. Fixes bug 6274; bugfix on 0.2.3.6-alpha.
  22853. - When disabling guards for having too high a proportion of failed
  22854. circuits, make sure to look at each guard. Fixes bug 6397; bugfix
  22855. on 0.2.3.17-beta.
  22856. o Packaging (RPM):
  22857. - Update our default RPM spec files to work with mock and rpmbuild
  22858. on RHEL/Fedora. They have an updated set of dependencies and
  22859. conflicts, a fix for an ancient typo when creating the "_tor"
  22860. user, and better instructions. Thanks to Ondrej Mikle for the
  22861. patch series. Fixes bug 6043.
  22862. o Testing:
  22863. - Make it possible to set the TestingTorNetwork configuration
  22864. option using AlternateDirAuthority and AlternateBridgeAuthority
  22865. as an alternative to setting DirServer. Addresses ticket 6377.
  22866. o Documentation:
  22867. - Clarify the documentation for the Alternate*Authority options.
  22868. Fixes bug 6387.
  22869. - Fix some typos in the manpages. Patch from A. Costa. Fixes bug 6500.
  22870. o Code simplification and refactoring:
  22871. - Do not use SMARTLIST_FOREACH for any loop whose body exceeds
  22872. 10 lines. Also, don't nest them. Doing so in the past has
  22873. led to hard-to-debug code. The new style is to use the
  22874. SMARTLIST_FOREACH_{BEGIN,END} pair. Addresses issue 6400.
  22875. Changes in version 0.2.3.19-rc - 2012-07-06
  22876. Tor 0.2.3.19-rc is the second release candidate for the Tor 0.2.3.x
  22877. series. It fixes the compile on Windows, reverts to a GeoIP database
  22878. that isn't as broken, and fixes a flow control bug that has been around
  22879. since the beginning of Tor.
  22880. o Major bugfixes:
  22881. - Fix a bug handling SENDME cells on nonexistent streams that could
  22882. result in bizarre window values. Report and patch contributed
  22883. pseudonymously. Fixes part of bug 6271. This bug was introduced
  22884. before the first Tor release, in svn commit r152.
  22885. - Revert to the May 1 2012 Maxmind GeoLite Country database. In the
  22886. June 2012 database, Maxmind marked many Tor relays as country "A1",
  22887. which will cause risky behavior for clients that set EntryNodes
  22888. or ExitNodes. Addresses bug 6334; bugfix on 0.2.3.17-beta.
  22889. - Instead of ENOBUFS on Windows, say WSAENOBUFS. Fixes compilation
  22890. on Windows. Fixes bug 6296; bugfix on 0.2.3.18-rc.
  22891. o Minor bugfixes:
  22892. - Fix wrong TCP port range in parse_port_range(). Fixes bug 6218;
  22893. bugfix on 0.2.1.10-alpha.
  22894. Changes in version 0.2.3.18-rc - 2012-06-28
  22895. Tor 0.2.3.18-rc is the first release candidate for the Tor 0.2.3.x
  22896. series. It fixes a few smaller bugs, but generally appears stable.
  22897. Please test it and let us know whether it is!
  22898. o Major bugfixes:
  22899. - Allow wildcarded mapaddress targets to be specified on the
  22900. controlport. Partially fixes bug 6244; bugfix on 0.2.3.9-alpha.
  22901. - Make our linker option detection code more robust against linkers
  22902. such as on FreeBSD 8, where a bad combination of options completes
  22903. successfully but makes an unrunnable binary. Fixes bug 6173;
  22904. bugfix on 0.2.3.17-beta.
  22905. o Minor bugfixes (on 0.2.2.x and earlier):
  22906. - Avoid a false positive in the util/threads unit test by increasing
  22907. the maximum timeout time. Fixes bug 6227; bugfix on 0.2.0.4-alpha.
  22908. - Replace "Sending publish request" log messages with "Launching
  22909. upload", so that they no longer confusingly imply that we're
  22910. sending something to a directory we might not even be connected
  22911. to yet. Fixes bug 3311; bugfix on 0.2.0.10-alpha.
  22912. - Make sure to set *socket_error in all error cases in
  22913. connection_connect(), so it can't produce a warning about
  22914. errno being zero from errno_to_orconn_end_reason(). Bugfix on
  22915. 0.2.1.1-alpha; resolves ticket 6028.
  22916. - Downgrade "Got a certificate, but we already have it" log messages
  22917. from warning to info, except when we're a dirauth. Fixes bug 5238;
  22918. bugfix on 0.2.1.7-alpha.
  22919. - When checking for requested signatures on the latest consensus
  22920. before serving it to a client, make sure to check the right
  22921. consensus flavor. Bugfix on 0.2.2.6-alpha.
  22922. - Downgrade "eventdns rejected address" message to LOG_PROTOCOL_WARN.
  22923. Fixes bug 5932; bugfix on 0.2.2.7-alpha.
  22924. o Minor bugfixes (on 0.2.3.x):
  22925. - Make format_helper_exit_status() avoid unnecessary space padding
  22926. and stop confusing log_from_pipe(). Fixes ticket 5557; bugfix
  22927. on 0.2.3.1-alpha.
  22928. - Downgrade a message about cleaning the microdescriptor cache to
  22929. "info" from "notice". Fixes bug 6238; bugfix on 0.2.3.1-alpha.
  22930. - Log a BUG message at severity INFO if we have a networkstatus with
  22931. a missing entry for some microdescriptor. Continues on a patch
  22932. to 0.2.3.2-alpha.
  22933. - Improve the log message when a managed proxy fails to launch. Fixes
  22934. bug 5099; bugfix on 0.2.3.6-alpha.
  22935. - Don't do DNS lookups when parsing corrupted managed proxy protocol
  22936. messages. Fixes bug 6226; bugfix on 0.2.3.6-alpha.
  22937. - When formatting wildcarded address mappings for the controller,
  22938. be sure to include "*." as appropriate. Partially fixes bug 6244;
  22939. bugfix on 0.2.3.9-alpha.
  22940. - Avoid a warning caused by using strcspn() from glibc with clang 3.0.
  22941. Bugfix on 0.2.3.13-alpha.
  22942. - Stop logging messages about running with circuit timeout learning
  22943. enabled at severity LD_BUG. Fixes bug 6169; bugfix on 0.2.3.17-beta.
  22944. - Disable a spurious warning about reading on a marked and flushing
  22945. connection. We shouldn't be doing that, but apparently we
  22946. sometimes do. Fixes bug 6203; bugfix on 0.2.3.17-beta.
  22947. - Fix a bug that stopped AllowDotExit from working on addresses
  22948. that had an entry in the DNS cache. Fixes bug 6211; bugfix on
  22949. 0.2.3.17-beta.
  22950. o Code simplification, refactoring, unit tests:
  22951. - Move tor_gettimeofday_cached() into compat_libevent.c, and use
  22952. Libevent's notion of cached time when possible.
  22953. - Remove duplicate code for invoking getrlimit() from control.c.
  22954. - Add a unit test for the environment_variable_names_equal function.
  22955. o Documentation:
  22956. - Document the --defaults-torrc option, and the new (in 0.2.3)
  22957. semantics for overriding, extending, and clearing lists of
  22958. options. Closes bug 4748.
  22959. Changes in version 0.2.3.17-beta - 2012-06-15
  22960. Tor 0.2.3.17-beta enables compiler and linker hardening by default,
  22961. gets our TLS handshake back on track for being able to blend in with
  22962. Firefox, fixes a big bug in 0.2.3.16-alpha that broke Tor's interaction
  22963. with Vidalia, and otherwise continues to get us closer to a release
  22964. candidate.
  22965. o Major features:
  22966. - Enable gcc and ld hardening by default. Resolves ticket 5210.
  22967. - Update TLS cipher list to match Firefox 8 and later. Resolves
  22968. ticket 4744.
  22969. - Implement the client side of proposal 198: remove support for
  22970. clients falsely claiming to support standard ciphersuites that
  22971. they can actually provide. As of modern OpenSSL versions, it's not
  22972. necessary to fake any standard ciphersuite, and doing so prevents
  22973. us from using better ciphersuites in the future, since servers
  22974. can't know whether an advertised ciphersuite is really supported or
  22975. not. Some hosts -- notably, ones with very old versions of OpenSSL
  22976. or where OpenSSL has been built with ECC disabled -- will stand
  22977. out because of this change; TBB users should not be affected.
  22978. o Major bugfixes:
  22979. - Change the default value for DynamicDHGroups (introduced in
  22980. 0.2.3.9-alpha) to 0. This feature can make Tor relays less
  22981. identifiable by their use of the mod_ssl DH group, but at
  22982. the cost of some usability (#4721) and bridge tracing (#6087)
  22983. regressions. Resolves ticket 5598.
  22984. - Send a CRLF at the end of each STATUS_* control protocol event. This
  22985. bug tickled a bug in Vidalia which would make it freeze. Fixes
  22986. bug 6094; bugfix on 0.2.3.16-alpha.
  22987. o Minor bugfixes:
  22988. - Disable writing on marked-for-close connections when they are
  22989. blocked on bandwidth, to prevent busy-looping in Libevent. Fixes
  22990. bug 5263; bugfix on 0.0.2pre13, where we first added a special
  22991. case for flushing marked connections.
  22992. - Detect SSL handshake even when the initial attempt to write the
  22993. server hello fails. Fixes bug 4592; bugfix on 0.2.0.13-alpha.
  22994. - Change the AllowDotExit rules so they should actually work.
  22995. We now enforce AllowDotExit only immediately after receiving an
  22996. address via SOCKS or DNSPort: other sources are free to provide
  22997. .exit addresses after the resolution occurs. Fixes bug 3940;
  22998. bugfix on 0.2.2.1-alpha.
  22999. - Fix a (harmless) integer overflow in cell statistics reported by
  23000. some fast relays. Fixes bug 5849; bugfix on 0.2.2.1-alpha.
  23001. - Make sure circuitbuild.c checks LearnCircuitBuildTimeout in all the
  23002. right places and never depends on the consensus parameters or
  23003. computes adaptive timeouts when it is disabled. Fixes bug 5049;
  23004. bugfix on 0.2.2.14-alpha.
  23005. - When building Tor on Windows with -DUNICODE (not default), ensure
  23006. that error messages, filenames, and DNS server names are always
  23007. NUL-terminated when we convert them to a single-byte encoding.
  23008. Fixes bug 5909; bugfix on 0.2.2.16-alpha.
  23009. - Make Tor build correctly again with -DUNICODE -D_UNICODE defined.
  23010. Fixes bug 6097; bugfix on 0.2.2.16-alpha.
  23011. - Fix an edge case where TestingTorNetwork is set but the authorities
  23012. and relays all have an uptime of zero, where the private Tor network
  23013. could briefly lack support for hidden services. Fixes bug 3886;
  23014. bugfix on 0.2.2.18-alpha.
  23015. - Correct the manpage's descriptions for the default values of
  23016. DirReqStatistics and ExtraInfoStatistics. Fixes bug 2865; bugfix
  23017. on 0.2.3.1-alpha.
  23018. - Fix the documentation for the --hush and --quiet command line
  23019. options, which changed their behavior back in 0.2.3.3-alpha.
  23020. - Fix compilation warning with clang 3.1. Fixes bug 6141; bugfix on
  23021. 0.2.3.11-alpha.
  23022. o Minor features:
  23023. - Rate-limit the "Weighted bandwidth is 0.000000" message, and add
  23024. more information to it, so that we can track it down in case it
  23025. returns again. Mitigates bug 5235.
  23026. - Check CircuitBuildTimeout and LearnCircuitBuildTimeout in
  23027. options_validate(); warn if LearnCircuitBuildTimeout is disabled and
  23028. CircuitBuildTimeout is set unreasonably low. Resolves ticket 5452.
  23029. - Warn the user when HTTPProxy, but no other proxy type, is
  23030. configured. This can cause surprising behavior: it doesn't send
  23031. all of Tor's traffic over the HTTPProxy -- it sends unencrypted
  23032. directory traffic only. Resolves ticket 4663.
  23033. - Issue a notice if a guard completes less than 40% of your circuits.
  23034. Threshold is configurable by torrc option PathBiasNoticeRate and
  23035. consensus parameter pb_noticepct. There is additional, off-by-
  23036. default code to disable guards which fail too many circuits.
  23037. Addresses ticket 5458.
  23038. - Update to the June 6 2012 Maxmind GeoLite Country database.
  23039. o Code simplifications and refactoring:
  23040. - Remove validate_pluggable_transports_config(): its warning
  23041. message is now handled by connection_or_connect().
  23042. Changes in version 0.2.2.37 - 2012-06-06
  23043. Tor 0.2.2.37 introduces a workaround for a critical renegotiation
  23044. bug in OpenSSL 1.0.1 (where 20% of the Tor network can't talk to itself
  23045. currently).
  23046. o Major bugfixes:
  23047. - Work around a bug in OpenSSL that broke renegotiation with TLS
  23048. 1.1 and TLS 1.2. Without this workaround, all attempts to speak
  23049. the v2 Tor connection protocol when both sides were using OpenSSL
  23050. 1.0.1 would fail. Resolves ticket 6033.
  23051. - When waiting for a client to renegotiate, don't allow it to add
  23052. any bytes to the input buffer. This fixes a potential DoS issue.
  23053. Fixes bugs 5934 and 6007; bugfix on 0.2.0.20-rc.
  23054. - Fix an edge case where if we fetch or publish a hidden service
  23055. descriptor, we might build a 4-hop circuit and then use that circuit
  23056. for exiting afterwards -- even if the new last hop doesn't obey our
  23057. ExitNodes config option. Fixes bug 5283; bugfix on 0.2.0.10-alpha.
  23058. o Minor bugfixes:
  23059. - Fix a build warning with Clang 3.1 related to our use of vasprintf.
  23060. Fixes bug 5969. Bugfix on 0.2.2.11-alpha.
  23061. o Minor features:
  23062. - Tell GCC and Clang to check for any errors in format strings passed
  23063. to the tor_v*(print|scan)f functions.
  23064. Changes in version 0.2.3.16-alpha - 2012-06-05
  23065. Tor 0.2.3.16-alpha introduces a workaround for a critical renegotiation
  23066. bug in OpenSSL 1.0.1 (where 20% of the Tor network can't talk to itself
  23067. currently). It also fixes a variety of smaller bugs and other cleanups
  23068. that get us closer to a release candidate.
  23069. o Major bugfixes (general):
  23070. - Work around a bug in OpenSSL that broke renegotiation with TLS
  23071. 1.1 and TLS 1.2. Without this workaround, all attempts to speak
  23072. the v2 Tor connection protocol when both sides were using OpenSSL
  23073. 1.0.1 would fail. Resolves ticket 6033.
  23074. - When waiting for a client to renegotiate, don't allow it to add
  23075. any bytes to the input buffer. This fixes a potential DoS issue.
  23076. Fixes bugs 5934 and 6007; bugfix on 0.2.0.20-rc.
  23077. - Pass correct OR address to managed proxies (like obfsproxy),
  23078. even when ORListenAddress is used. Fixes bug 4865; bugfix on
  23079. 0.2.3.9-alpha.
  23080. - The advertised platform of a router now includes only its operating
  23081. system's name (e.g., "Linux", "Darwin", "Windows 7"), and not its
  23082. service pack level (for Windows) or its CPU architecture (for Unix).
  23083. We also no longer include the "git-XYZ" tag in the version. Resolves
  23084. part of bug 2988.
  23085. o Major bugfixes (clients):
  23086. - If we are unable to find any exit that supports our predicted ports,
  23087. stop calling them predicted, so that we don't loop and build
  23088. hopeless circuits indefinitely. Fixes bug 3296; bugfix on 0.0.9pre6,
  23089. which introduced predicted ports.
  23090. - Fix an edge case where if we fetch or publish a hidden service
  23091. descriptor, we might build a 4-hop circuit and then use that circuit
  23092. for exiting afterwards -- even if the new last hop doesn't obey our
  23093. ExitNodes config option. Fixes bug 5283; bugfix on 0.2.0.10-alpha.
  23094. - Check at each new consensus whether our entry guards were picked
  23095. long enough ago that we should rotate them. Previously, we only
  23096. did this check at startup, which could lead to us holding a guard
  23097. indefinitely. Fixes bug 5380; bugfix on 0.2.1.14-rc.
  23098. - When fetching a bridge descriptor from a bridge authority,
  23099. always do so anonymously, whether we have been able to open
  23100. circuits or not. Partial fix for bug 1938; bugfix on 0.2.0.7-alpha.
  23101. This behavior makes it *safer* to use UpdateBridgesFromAuthority,
  23102. but we'll need to wait for bug 6010 before it's actually usable.
  23103. o Major bugfixes (directory authorities):
  23104. - When computing weight parameters, behave more robustly in the
  23105. presence of a bad bwweightscale value. Previously, the authorities
  23106. would crash if they agreed on a sufficiently broken weight_scale
  23107. value: now, they use a reasonable default and carry on. Partial
  23108. fix for 5786; bugfix on 0.2.2.17-alpha.
  23109. - Check more thoroughly to prevent a rogue authority from
  23110. double-voting on any consensus directory parameter. Previously,
  23111. authorities would crash in this case if the total number of
  23112. votes for any parameter exceeded the number of active voters,
  23113. but would let it pass otherwise. Partial fix for bug 5786; bugfix
  23114. on 0.2.2.2-alpha.
  23115. o Minor features:
  23116. - Rate-limit log messages when asked to connect anonymously to
  23117. a private address. When these hit, they tended to hit fast and
  23118. often. Also, don't bother trying to connect to addresses that we
  23119. are sure will resolve to 127.0.0.1: getting 127.0.0.1 in a directory
  23120. reply makes us think we have been lied to, even when the address the
  23121. client tried to connect to was "localhost." Resolves ticket 2822.
  23122. - Allow packagers to insert an extra string in server descriptor
  23123. platform lines by setting the preprocessor variable TOR_BUILD_TAG.
  23124. Resolves the rest of ticket 2988.
  23125. - Raise the threshold of server descriptors needed (75%) and exit
  23126. server descriptors needed (50%) before we will declare ourselves
  23127. bootstrapped. This will make clients start building circuits a
  23128. little later, but makes the initially constructed circuits less
  23129. skewed and less in conflict with further directory fetches. Fixes
  23130. ticket 3196.
  23131. - Close any connection that sends unrecognized junk before the
  23132. handshake. Solves an issue noted in bug 4369.
  23133. - Improve log messages about managed transports. Resolves ticket 5070.
  23134. - Tag a bridge's descriptor as "never to be sent unencrypted".
  23135. This shouldn't matter, since bridges don't open non-anonymous
  23136. connections to the bridge authority and don't allow unencrypted
  23137. directory connections from clients, but we might as well make
  23138. sure. Closes bug 5139.
  23139. - Expose our view of whether we have gone dormant to the controller,
  23140. via a new "GETINFO dormant" value. Torbutton and other controllers
  23141. can use this to avoid doing periodic requests through Tor while
  23142. it's dormant (bug 4718). Fixes bug 5954.
  23143. - Tell GCC and Clang to check for any errors in format strings passed
  23144. to the tor_v*(print|scan)f functions.
  23145. - Update to the May 1 2012 Maxmind GeoLite Country database.
  23146. o Minor bugfixes (already included in 0.2.2.36):
  23147. - Reject out-of-range times like 23:59:61 in parse_rfc1123_time().
  23148. Fixes bug 5346; bugfix on 0.0.8pre3.
  23149. - Correct parsing of certain date types in parse_http_time().
  23150. Without this patch, If-Modified-Since would behave
  23151. incorrectly. Fixes bug 5346; bugfix on 0.2.0.2-alpha. Patch from
  23152. Esteban Manchado Velázques.
  23153. - Make our number-parsing functions always treat too-large values
  23154. as an error, even when those values exceed the width of the
  23155. underlying type. Previously, if the caller provided these
  23156. functions with minima or maxima set to the extreme values of the
  23157. underlying integer type, these functions would return those
  23158. values on overflow rather than treating overflow as an error.
  23159. Fixes part of bug 5786; bugfix on 0.0.9.
  23160. - If we hit the error case where routerlist_insert() replaces an
  23161. existing (old) server descriptor, make sure to remove that
  23162. server descriptor from the old_routers list. Fix related to bug
  23163. 1776. Bugfix on 0.2.2.18-alpha.
  23164. - Clarify the behavior of MaxCircuitDirtiness with hidden service
  23165. circuits. Fixes issue 5259.
  23166. o Minor bugfixes (coding cleanup, on 0.2.2.x and earlier):
  23167. - Prevent a null-pointer dereference when receiving a data cell
  23168. for a nonexistent stream when the circuit in question has an
  23169. empty deliver window. We don't believe this is triggerable,
  23170. since we don't currently allow deliver windows to become empty,
  23171. but the logic is tricky enough that it's better to make the code
  23172. robust. Fixes bug 5541; bugfix on 0.0.2pre14.
  23173. - Fix a memory leak when trying to launch a DNS request when the
  23174. network is disabled or the nameservers are unconfigurable. Fixes
  23175. bug 5916; bugfix on Tor 0.1.2.1-alpha (for the unconfigurable
  23176. nameserver case) and on 0.2.3.9-alpha (for the DisableNetwork case).
  23177. - Don't hold a Windows file handle open for every file mapping;
  23178. the file mapping handle is sufficient. Fixes bug 5951; bugfix on
  23179. 0.1.2.1-alpha.
  23180. - Avoid O(n^2) performance characteristics when parsing a large
  23181. extrainfo cache. Fixes bug 5828; bugfix on 0.2.0.1-alpha.
  23182. - Format more doubles with %f, not %lf. Patch from grarpamp to make
  23183. Tor build correctly on older BSDs again. Fixes bug 3894; bugfix on
  23184. Tor 0.2.0.8-alpha.
  23185. - Make our replacement implementation of strtok_r() compatible with
  23186. the standard behavior of strtok_r(). Patch by nils. Fixes bug 5091;
  23187. bugfix on 0.2.2.1-alpha.
  23188. - Fix a NULL-pointer dereference on a badly formed
  23189. SETCIRCUITPURPOSE command. Found by mikeyc. Fixes bug 5796;
  23190. bugfix on 0.2.2.9-alpha.
  23191. - Fix a build warning with Clang 3.1 related to our use of vasprintf.
  23192. Fixes bug 5969. Bugfix on 0.2.2.11-alpha.
  23193. - Defensively refactor rend_mid_rendezvous() so that protocol
  23194. violations and length checks happen in the beginning. Fixes
  23195. bug 5645.
  23196. - Set _WIN32_WINNT to 0x0501 consistently throughout the code, so
  23197. that IPv6 stuff will compile on MSVC, and compilation issues
  23198. will be easier to track down. Fixes bug 5861.
  23199. o Minor bugfixes (correctness, on 0.2.2.x and earlier):
  23200. - Exit nodes now correctly report EADDRINUSE and EADDRNOTAVAIL as
  23201. resource exhaustion, so that clients can adjust their load to
  23202. try other exits. Fixes bug 4710; bugfix on 0.1.0.1-rc, which
  23203. started using END_STREAM_REASON_RESOURCELIMIT.
  23204. - Don't check for whether the address we're using for outbound
  23205. connections has changed until after the outbound connection has
  23206. completed. On Windows, getsockname() doesn't succeed until the
  23207. connection is finished. Fixes bug 5374; bugfix on 0.1.1.14-alpha.
  23208. - If the configuration tries to set MyFamily on a bridge, refuse to
  23209. do so, and warn about the security implications. Fixes bug 4657;
  23210. bugfix on 0.2.0.3-alpha.
  23211. - If the client fails to set a reasonable set of ciphersuites
  23212. during its v2 handshake renegotiation, allow the renegotiation to
  23213. continue nevertheless (i.e. send all the required certificates).
  23214. Fixes bug 4591; bugfix on 0.2.0.20-rc.
  23215. - When we receive a SIGHUP and the controller __ReloadTorrcOnSIGHUP
  23216. option is set to 0 (which Vidalia version 0.2.16 now does when
  23217. a SAVECONF attempt fails), perform other actions that SIGHUP
  23218. usually causes (like reopening the logs). Fixes bug 5095; bugfix
  23219. on 0.2.1.9-alpha.
  23220. - If we fail to write a microdescriptor to the disk cache, do not
  23221. continue replacing the old microdescriptor file. Fixes bug 2954;
  23222. bugfix on 0.2.2.6-alpha.
  23223. - Exit nodes don't need to fetch certificates for authorities that
  23224. they don't recognize; only directory authorities, bridges,
  23225. and caches need to do that. Fixes part of bug 2297; bugfix on
  23226. 0.2.2.11-alpha.
  23227. - Correctly handle checking the permissions on the parent
  23228. directory of a control socket in the root directory. Bug found
  23229. by Esteban Manchado Velázquez. Fixes bug 5089; bugfix on Tor
  23230. 0.2.2.26-beta.
  23231. - When told to add a bridge with the same digest as a preexisting
  23232. bridge but a different addr:port, change the addr:port as
  23233. requested. Previously we would not notice the change. Fixes half
  23234. of bug 5603; fix on 0.2.2.26-beta.
  23235. - End AUTHCHALLENGE error messages (in the control protocol) with
  23236. a CRLF. Fixes bug 5760; bugfix on 0.2.2.36 and 0.2.3.13-alpha.
  23237. o Minor bugfixes (on 0.2.3.x):
  23238. - Turn an assertion (that the number of handshakes received as a
  23239. server is not < 1) into a warning. Fixes bug 4873; bugfix on
  23240. 0.2.3.1-alpha.
  23241. - Format IPv4 addresses correctly in ADDRMAP events. (Previously,
  23242. we had reversed them when the answer was cached.) Fixes bug
  23243. 5723; bugfix on 0.2.3.1-alpha.
  23244. - Work correctly on Linux systems with accept4 support advertised in
  23245. their headers, but without accept4 support in the kernel. Fix
  23246. by murb. Fixes bug 5762; bugfix on 0.2.3.1-alpha.
  23247. - When told to add a bridge with the same addr:port as a preexisting
  23248. bridge but a different transport, change the transport as
  23249. requested. Previously we would not notice the change. Fixes half
  23250. of bug 5603; fix on 0.2.3.2-alpha.
  23251. - Avoid a "double-reply" warning when replying to a SOCKS request
  23252. with a parse error. Patch from Fabian Keil. Fixes bug 4108;
  23253. bugfix on 0.2.3.4-alpha.
  23254. - Fix a bug where a bridge authority crashes if it has seen no
  23255. directory requests when it's time to write statistics to disk.
  23256. Fixes bug 5891; bugfix on 0.2.3.6-alpha. Also fixes bug 5508 in
  23257. a better way.
  23258. - Don't try to open non-control listeners when DisableNetwork is set.
  23259. Previously, we'd open all listeners, then immediately close them.
  23260. Fixes bug 5604; bugfix on 0.2.3.9-alpha.
  23261. - Don't abort the managed proxy protocol if the managed proxy
  23262. sends us an unrecognized line; ignore it instead. Fixes bug
  23263. 5910; bugfix on 0.2.3.9-alpha.
  23264. - Fix a compile warning in crypto.c when compiling with clang 3.1.
  23265. Fixes bug 5969, bugfix on 0.2.3.9-alpha.
  23266. - Fix a compilation issue on GNU Hurd, which doesn't have PATH_MAX.
  23267. Fixes bug 5355; bugfix on 0.2.3.11-alpha.
  23268. - Remove bogus definition of "_WIN32" from src/win32/orconfig.h, to
  23269. unbreak the MSVC build. Fixes bug 5858; bugfix on 0.2.3.12-alpha.
  23270. - Resolve numerous small warnings and build issues with MSVC. Resolves
  23271. bug 5859.
  23272. o Documentation fixes:
  23273. - Improve the manual's documentation for the NT Service command-line
  23274. options. Addresses ticket 3964.
  23275. - Clarify SessionGroup documentation slightly; resolves ticket 5437.
  23276. - Document the changes to the ORPort and DirPort options, and the
  23277. fact that {OR/Dir}ListenAddress is now unnecessary (and
  23278. therefore deprecated). Resolves ticket 5597.
  23279. o Removed files:
  23280. - Remove the torrc.bridge file: we don't use it for anything, and
  23281. it had become badly desynchronized from torrc.sample. Resolves
  23282. bug 5622.
  23283. Changes in version 0.2.2.36 - 2012-05-24
  23284. Tor 0.2.2.36 updates the addresses for two of the eight directory
  23285. authorities, fixes some potential anonymity and security issues,
  23286. and fixes several crash bugs.
  23287. Tor 0.2.1.x has reached its end-of-life. Those Tor versions have many
  23288. known flaws, and nobody should be using them. You should upgrade. If
  23289. you're using a Linux or BSD and its packages are obsolete, stop using
  23290. those packages and upgrade anyway.
  23291. o Directory authority changes:
  23292. - Change IP address for maatuska (v3 directory authority).
  23293. - Change IP address for ides (v3 directory authority), and rename
  23294. it to turtles.
  23295. o Security fixes:
  23296. - When building or running with any version of OpenSSL earlier
  23297. than 0.9.8s or 1.0.0f, disable SSLv3 support. These OpenSSL
  23298. versions have a bug (CVE-2011-4576) in which their block cipher
  23299. padding includes uninitialized data, potentially leaking sensitive
  23300. information to any peer with whom they make a SSLv3 connection. Tor
  23301. does not use SSL v3 by default, but a hostile client or server
  23302. could force an SSLv3 connection in order to gain information that
  23303. they shouldn't have been able to get. The best solution here is to
  23304. upgrade to OpenSSL 0.9.8s or 1.0.0f (or later). But when building
  23305. or running with a non-upgraded OpenSSL, we disable SSLv3 entirely
  23306. to make sure that the bug can't happen.
  23307. - Never use a bridge or a controller-supplied node as an exit, even
  23308. if its exit policy allows it. Found by wanoskarnet. Fixes bug
  23309. 5342. Bugfix on 0.1.1.15-rc (for controller-purpose descriptors)
  23310. and 0.2.0.3-alpha (for bridge-purpose descriptors).
  23311. - Only build circuits if we have a sufficient threshold of the total
  23312. descriptors that are marked in the consensus with the "Exit"
  23313. flag. This mitigates an attack proposed by wanoskarnet, in which
  23314. all of a client's bridges collude to restrict the exit nodes that
  23315. the client knows about. Fixes bug 5343.
  23316. - Provide controllers with a safer way to implement the cookie
  23317. authentication mechanism. With the old method, if another locally
  23318. running program could convince a controller that it was the Tor
  23319. process, then that program could trick the controller into telling
  23320. it the contents of an arbitrary 32-byte file. The new "SAFECOOKIE"
  23321. authentication method uses a challenge-response approach to prevent
  23322. this attack. Fixes bug 5185; implements proposal 193.
  23323. o Major bugfixes:
  23324. - Avoid logging uninitialized data when unable to decode a hidden
  23325. service descriptor cookie. Fixes bug 5647; bugfix on 0.2.1.5-alpha.
  23326. - Avoid a client-side assertion failure when receiving an INTRODUCE2
  23327. cell on a general purpose circuit. Fixes bug 5644; bugfix on
  23328. 0.2.1.6-alpha.
  23329. - Fix builds when the path to sed, openssl, or sha1sum contains
  23330. spaces, which is pretty common on Windows. Fixes bug 5065; bugfix
  23331. on 0.2.2.1-alpha.
  23332. - Correct our replacements for the timeradd() and timersub() functions
  23333. on platforms that lack them (for example, Windows). The timersub()
  23334. function is used when expiring circuits, while timeradd() is
  23335. currently unused. Bug report and patch by Vektor. Fixes bug 4778;
  23336. bugfix on 0.2.2.24-alpha.
  23337. - Fix the SOCKET_OK test that we use to tell when socket
  23338. creation fails so that it works on Win64. Fixes part of bug 4533;
  23339. bugfix on 0.2.2.29-beta. Bug found by wanoskarnet.
  23340. o Minor bugfixes:
  23341. - Reject out-of-range times like 23:59:61 in parse_rfc1123_time().
  23342. Fixes bug 5346; bugfix on 0.0.8pre3.
  23343. - Make our number-parsing functions always treat too-large values
  23344. as an error, even when those values exceed the width of the
  23345. underlying type. Previously, if the caller provided these
  23346. functions with minima or maxima set to the extreme values of the
  23347. underlying integer type, these functions would return those
  23348. values on overflow rather than treating overflow as an error.
  23349. Fixes part of bug 5786; bugfix on 0.0.9.
  23350. - Older Linux kernels erroneously respond to strange nmap behavior
  23351. by having accept() return successfully with a zero-length
  23352. socket. When this happens, just close the connection. Previously,
  23353. we would try harder to learn the remote address: but there was
  23354. no such remote address to learn, and our method for trying to
  23355. learn it was incorrect. Fixes bugs 1240, 4745, and 4747. Bugfix
  23356. on 0.1.0.3-rc. Reported and diagnosed by "r1eo".
  23357. - Correct parsing of certain date types in parse_http_time().
  23358. Without this patch, If-Modified-Since would behave
  23359. incorrectly. Fixes bug 5346; bugfix on 0.2.0.2-alpha. Patch from
  23360. Esteban Manchado Velázques.
  23361. - Change the BridgePassword feature (part of the "bridge community"
  23362. design, which is not yet implemented) to use a time-independent
  23363. comparison. The old behavior might have allowed an adversary
  23364. to use timing to guess the BridgePassword value. Fixes bug 5543;
  23365. bugfix on 0.2.0.14-alpha.
  23366. - Detect and reject certain misformed escape sequences in
  23367. configuration values. Previously, these values would cause us
  23368. to crash if received in a torrc file or over an authenticated
  23369. control port. Bug found by Esteban Manchado Velázquez, and
  23370. independently by Robert Connolly from Matta Consulting who further
  23371. noted that it allows a post-authentication heap overflow. Patch
  23372. by Alexander Schrijver. Fixes bugs 5090 and 5402 (CVE 2012-1668);
  23373. bugfix on 0.2.0.16-alpha.
  23374. - Fix a compile warning when using the --enable-openbsd-malloc
  23375. configure option. Fixes bug 5340; bugfix on 0.2.0.20-rc.
  23376. - During configure, detect when we're building with clang version
  23377. 3.0 or lower and disable the -Wnormalized=id and -Woverride-init
  23378. CFLAGS. clang doesn't support them yet.
  23379. - When sending an HTTP/1.1 proxy request, include a Host header.
  23380. Fixes bug 5593; bugfix on 0.2.2.1-alpha.
  23381. - Fix a NULL-pointer dereference on a badly formed SETCIRCUITPURPOSE
  23382. command. Found by mikeyc. Fixes bug 5796; bugfix on 0.2.2.9-alpha.
  23383. - If we hit the error case where routerlist_insert() replaces an
  23384. existing (old) server descriptor, make sure to remove that
  23385. server descriptor from the old_routers list. Fix related to bug
  23386. 1776. Bugfix on 0.2.2.18-alpha.
  23387. o Minor bugfixes (documentation and log messages):
  23388. - Fix a typo in a log message in rend_service_rendezvous_has_opened().
  23389. Fixes bug 4856; bugfix on Tor 0.0.6.
  23390. - Update "ClientOnly" man page entry to explain that there isn't
  23391. really any point to messing with it. Resolves ticket 5005.
  23392. - Document the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays
  23393. directory authority option (introduced in Tor 0.2.2.34).
  23394. - Downgrade the "We're missing a certificate" message from notice
  23395. to info: people kept mistaking it for a real problem, whereas it
  23396. is seldom the problem even when we are failing to bootstrap. Fixes
  23397. bug 5067; bugfix on 0.2.0.10-alpha.
  23398. - Correctly spell "connect" in a log message on failure to create a
  23399. controlsocket. Fixes bug 4803; bugfix on 0.2.2.26-beta.
  23400. - Clarify the behavior of MaxCircuitDirtiness with hidden service
  23401. circuits. Fixes issue 5259.
  23402. o Minor features:
  23403. - Directory authorities now reject versions of Tor older than
  23404. 0.2.1.30, and Tor versions between 0.2.2.1-alpha and 0.2.2.20-alpha
  23405. inclusive. These versions accounted for only a small fraction of
  23406. the Tor network, and have numerous known security issues. Resolves
  23407. issue 4788.
  23408. - Update to the May 1 2012 Maxmind GeoLite Country database.
  23409. o Feature removal:
  23410. - When sending or relaying a RELAY_EARLY cell, we used to convert
  23411. it to a RELAY cell if the connection was using the v1 link
  23412. protocol. This was a workaround for older versions of Tor, which
  23413. didn't handle RELAY_EARLY cells properly. Now that all supported
  23414. versions can handle RELAY_EARLY cells, and now that we're enforcing
  23415. the "no RELAY_EXTEND commands except in RELAY_EARLY cells" rule,
  23416. remove this workaround. Addresses bug 4786.
  23417. Changes in version 0.2.3.15-alpha - 2012-04-30
  23418. Tor 0.2.3.15-alpha fixes a variety of smaller bugs, including making
  23419. the development branch build on Windows again.
  23420. o Minor bugfixes (on 0.2.2.x and earlier):
  23421. - Make sure that there are no unhandled pending TLS errors before
  23422. reading from a TLS stream. We had checks in 0.1.0.3-rc, but
  23423. lost them in 0.1.0.5-rc when we refactored read_to_buf_tls().
  23424. Bugfix on 0.1.0.5-rc; fixes bug 4528.
  23425. - Fix an assert that directory authorities could trigger on sighup
  23426. during some configuration state transitions. We now don't treat
  23427. it as a fatal error when the new descriptor we just generated in
  23428. init_keys() isn't accepted. Fixes bug 4438; bugfix on 0.2.1.9-alpha.
  23429. - After we pick a directory mirror, we would refuse to use it if
  23430. it's in our ExcludeExitNodes list, resulting in mysterious failures
  23431. to bootstrap for people who just wanted to avoid exiting from
  23432. certain locations. Fixes bug 5623; bugfix on 0.2.2.25-alpha.
  23433. - When building with --enable-static-tor on OpenBSD, do not
  23434. erroneously attempt to link -lrt. Fixes bug 5103.
  23435. o Minor bugfixes (on 0.2.3.x):
  23436. - When Tor is built with kernel headers from a recent (last few
  23437. years) Linux kernel, do not fail to run on older (pre-2.6.28
  23438. Linux kernels). Fixes bug 5112; bugfix on 0.2.3.1-alpha.
  23439. - Fix cross-compilation issues with mingw. Bugfixes on 0.2.3.6-alpha
  23440. and 0.2.3.12-alpha.
  23441. - Fix compilation with miniupnpc version 1.6; patch from
  23442. Anthony G. Basile. Fixes bug 5434; bugfix on 0.2.3.12-alpha.
  23443. - Fix compilation with MSVC, which had defined MS_WINDOWS. Bugfix
  23444. on 0.2.3.13-alpha; found and fixed by Gisle Vanem.
  23445. - Fix compilation on platforms without unistd.h, or where environ
  23446. is defined in stdlib.h. Fixes bug 5704; bugfix on 0.2.3.13-alpha.
  23447. o Minor features:
  23448. - Directory authorities are now a little more lenient at accepting
  23449. older router descriptors, or newer router descriptors that don't
  23450. make big changes. This should help ameliorate past and future
  23451. issues where routers think they have uploaded valid descriptors,
  23452. but the authorities don't think so. Fix for ticket 2479.
  23453. - Make the code that clients use to detect an address change be
  23454. IPv6-aware, so that it won't fill clients' logs with error
  23455. messages when trying to get the IPv4 address of an IPv6
  23456. connection. Implements ticket 5537.
  23457. o Removed features:
  23458. - Remove the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays option;
  23459. authorities needed to use it for a while to keep the network working
  23460. as people upgraded to 0.2.1.31, 0.2.2.34, or 0.2.3.6-alpha, but
  23461. that was six months ago. As of now, it should no longer be needed
  23462. or used.
  23463. Changes in version 0.2.3.14-alpha - 2012-04-23
  23464. Tor 0.2.3.14-alpha fixes yet more bugs to get us closer to a release
  23465. candidate. It also dramatically speeds up AES: fast relays should
  23466. consider switching to the newer OpenSSL library.
  23467. o Directory authority changes:
  23468. - Change IP address for ides (v3 directory authority), and rename
  23469. it to turtles.
  23470. o Major bugfixes:
  23471. - Avoid logging uninitialized data when unable to decode a hidden
  23472. service descriptor cookie. Fixes bug 5647; bugfix on 0.2.1.5-alpha.
  23473. - Avoid a client-side assertion failure when receiving an INTRODUCE2
  23474. cell on a general purpose circuit. Fixes bug 5644; bugfix on
  23475. 0.2.1.6-alpha.
  23476. - If authorities are unable to get a v2 consensus document from other
  23477. directory authorities, they no longer fall back to fetching
  23478. them from regular directory caches. Fixes bug 5635; bugfix on
  23479. 0.2.2.26-beta, where routers stopped downloading v2 consensus
  23480. documents entirely.
  23481. - When we start a Tor client with a normal consensus already cached,
  23482. be willing to download a microdescriptor consensus. Fixes bug 4011;
  23483. fix on 0.2.3.1-alpha.
  23484. o Major features (performance):
  23485. - When built to use OpenSSL 1.0.1, and built for an x86 or x86_64
  23486. instruction set, take advantage of OpenSSL's AESNI, bitsliced, or
  23487. vectorized AES implementations as appropriate. These can be much,
  23488. much faster than other AES implementations.
  23489. o Minor bugfixes (0.2.2.x and earlier):
  23490. - Don't launch more than 10 service-side introduction-point circuits
  23491. for a hidden service in five minutes. Previously, we would consider
  23492. launching more introduction-point circuits if at least one second
  23493. had passed without any introduction-point circuits failing. Fixes
  23494. bug 4607; bugfix on 0.0.7pre1.
  23495. - Change the BridgePassword feature (part of the "bridge community"
  23496. design, which is not yet implemented) to use a time-independent
  23497. comparison. The old behavior might have allowed an adversary
  23498. to use timing to guess the BridgePassword value. Fixes bug 5543;
  23499. bugfix on 0.2.0.14-alpha.
  23500. - Enforce correct return behavior of tor_vsscanf() when the '%%'
  23501. pattern is used. Fixes bug 5558. Bugfix on 0.2.1.13.
  23502. - When sending an HTTP/1.1 proxy request, include a Host header.
  23503. Fixes bug 5593; bugfix on 0.2.2.1-alpha.
  23504. - Don't log that we have "decided to publish new relay descriptor"
  23505. unless we are actually publishing a descriptor. Fixes bug 3942;
  23506. bugfix on 0.2.2.28-beta.
  23507. o Minor bugfixes (0.2.3.x):
  23508. - Fix a bug where a bridge authority crashes (on a failed assert)
  23509. if it has seen no directory requests when it's time to write
  23510. statistics to disk. Fixes bug 5508. Bugfix on 0.2.3.6-alpha.
  23511. - Fix bug stomping on ORPort option NoListen and ignoring option
  23512. NoAdvertise. Fixes bug 5151; bugfix on 0.2.3.9-alpha.
  23513. - In the testsuite, provide a large enough buffer in the tor_sscanf
  23514. unit test. Otherwise we'd overrun that buffer and crash during
  23515. the unit tests. Found by weasel. Fixes bug 5449; bugfix on
  23516. 0.2.3.12-alpha.
  23517. - Make sure we create the keys directory if it doesn't exist and we're
  23518. about to store the dynamic Diffie-Hellman parameters. Fixes bug
  23519. 5572; bugfix on 0.2.3.13-alpha.
  23520. - Fix a small memory leak when trying to decode incorrect base16
  23521. authenticator during SAFECOOKIE authentication. Found by
  23522. Coverity Scan. Fixes CID 507. Bugfix on 0.2.3.13-alpha.
  23523. o Minor features:
  23524. - Add more information to a log statement that might help track down
  23525. bug 4091. If you're seeing "Bug: tor_addr_is_internal() called with a
  23526. non-IP address" messages (or any Bug messages, for that matter!),
  23527. please let us know about it.
  23528. - Relays now understand an IPv6 address when they get one from a
  23529. directory server. Resolves ticket 4875.
  23530. - Resolve IPv6 addresses in bridge and entry statistics to country
  23531. code "??" which means we at least count them. Resolves ticket 5053;
  23532. improves on 0.2.3.9-alpha.
  23533. - Update to the April 3 2012 Maxmind GeoLite Country database.
  23534. - Begin a doc/state-contents.txt file to explain the contents of
  23535. the Tor state file. Fixes bug 2987.
  23536. o Default torrc changes:
  23537. - Stop listing "socksport 9050" in torrc.sample. We open a socks
  23538. port on 9050 by default anyway, so this should not change anything
  23539. in practice.
  23540. - Stop mentioning the deprecated *ListenAddress options in
  23541. torrc.sample. Fixes bug 5438.
  23542. - Document unit of bandwidth related options in sample torrc.
  23543. Fixes bug 5621.
  23544. o Removed features:
  23545. - The "torify" script no longer supports the "tsocks" socksifier
  23546. tool, since tsocks doesn't support DNS and UDP right for Tor.
  23547. Everyone should be using torsocks instead. Fixes bugs 3530 and
  23548. 5180. Based on a patch by "ugh".
  23549. o Code refactoring:
  23550. - Change the symmetric cipher interface so that creating and
  23551. initializing a stream cipher are no longer separate functions.
  23552. - Remove all internal support for unpadded RSA. We never used it, and
  23553. it would be a bad idea to start.
  23554. Changes in version 0.2.3.13-alpha - 2012-03-26
  23555. Tor 0.2.3.13-alpha fixes a variety of stability and correctness bugs
  23556. in managed pluggable transports, as well as providing other cleanups
  23557. that get us closer to a release candidate.
  23558. o Directory authority changes:
  23559. - Change IP address for maatuska (v3 directory authority).
  23560. o Security fixes:
  23561. - Provide controllers with a safer way to implement the cookie
  23562. authentication mechanism. With the old method, if another locally
  23563. running program could convince a controller that it was the Tor
  23564. process, then that program could trick the controller into telling
  23565. it the contents of an arbitrary 32-byte file. The new "SAFECOOKIE"
  23566. authentication method uses a challenge-response approach to prevent
  23567. this attack. Fixes bug 5185, implements proposal 193.
  23568. - Never use a bridge or a controller-supplied node as an exit, even
  23569. if its exit policy allows it. Found by wanoskarnet. Fixes bug
  23570. 5342. Bugfix on 0.1.1.15-rc (for controller-purpose descriptors)
  23571. and 0.2.0.3-alpha (for bridge-purpose descriptors).
  23572. - Only build circuits if we have a sufficient threshold of the total
  23573. descriptors that are marked in the consensus with the "Exit"
  23574. flag. This mitigates an attack proposed by wanoskarnet, in which
  23575. all of a client's bridges collude to restrict the exit nodes that
  23576. the client knows about. Fixes bug 5343.
  23577. o Major bugfixes (on Tor 0.2.3.x):
  23578. - Avoid an assert when managed proxies like obfsproxy are configured,
  23579. and we receive HUP signals or setconf attempts too rapidly. This
  23580. situation happens most commonly when Vidalia tries to attach to
  23581. Tor or tries to configure the Tor it's attached to. Fixes bug 5084;
  23582. bugfix on 0.2.3.6-alpha.
  23583. - Fix a relay-side pluggable transports bug where managed proxies were
  23584. unreachable from the Internet, because Tor asked them to bind on
  23585. localhost. Fixes bug 4725; bugfix on 0.2.3.9-alpha.
  23586. - Stop discarding command-line arguments when TestingTorNetwork
  23587. is set. Discovered by Kevin Bauer. Fixes bug 5373; bugfix on
  23588. 0.2.3.9-alpha, where task 4552 added support for two layers of
  23589. torrc files.
  23590. - Resume allowing the unit tests to run in gdb. This was accidentally
  23591. made impossible when the DisableDebuggerAttachment option was
  23592. introduced. Fixes bug 5448; bugfix on 0.2.3.9-alpha.
  23593. - Resume building with nat-pmp support. Fixes bug 4955; bugfix on
  23594. 0.2.3.11-alpha. Reported by Anthony G. Basile.
  23595. o Minor bugfixes (on 0.2.2.x and earlier):
  23596. - Ensure we don't cannibalize circuits that are longer than three hops
  23597. already, so we don't end up making circuits with 5 or more
  23598. hops. Patch contributed by wanoskarnet. Fixes bug 5231; bugfix on
  23599. 0.1.0.1-rc which introduced cannibalization.
  23600. - Detect and reject certain misformed escape sequences in
  23601. configuration values. Previously, these values would cause us
  23602. to crash if received in a torrc file or over an authenticated
  23603. control port. Bug found by Esteban Manchado Velázquez, and
  23604. independently by Robert Connolly from Matta Consulting who further
  23605. noted that it allows a post-authentication heap overflow. Patch
  23606. by Alexander Schrijver. Fixes bugs 5090 and 5402 (CVE 2012-1668);
  23607. bugfix on 0.2.0.16-alpha.
  23608. - Fix a compile warning when using the --enable-openbsd-malloc
  23609. configure option. Fixes bug 5340; bugfix on 0.2.0.20-rc.
  23610. - Directory caches no longer refuse to clean out descriptors because
  23611. of missing v2 networkstatus documents, unless they're configured
  23612. to retrieve v2 networkstatus documents. Fixes bug 4838; bugfix on
  23613. 0.2.2.26-beta. Patch by Daniel Bryg.
  23614. - Update to the latest version of the tinytest unit testing framework.
  23615. This includes a couple of bugfixes that can be relevant for
  23616. running forked unit tests on Windows, and removes all reserved
  23617. identifiers.
  23618. o Minor bugfixes (on 0.2.3.x):
  23619. - On a failed pipe() call, don't leak file descriptors. Fixes bug
  23620. 4296; bugfix on 0.2.3.1-alpha.
  23621. - Spec conformance: on a v3 handshake, do not send a NETINFO cell
  23622. until after we have received a CERTS cell. Fixes bug 4361; bugfix
  23623. on 0.2.3.6-alpha. Patch by "frosty".
  23624. - When binding to an IPv6 address, set the IPV6_V6ONLY socket
  23625. option, so that the IP stack doesn't decide to use it for IPv4
  23626. too. Fixes bug 4760; bugfix on 0.2.3.9-alpha.
  23627. - Ensure that variables set in Tor's environment cannot override
  23628. environment variables that Tor passes to a managed
  23629. pluggable-transport proxy. Previously, Tor would pass every
  23630. variable in its environment to managed proxies along with the new
  23631. ones, in such a way that on many operating systems, the inherited
  23632. environment variables would override those which Tor tried to
  23633. explicitly set. Bugfix on 0.2.3.12-alpha for most Unixoid systems;
  23634. bugfix on 0.2.3.9-alpha for Windows.
  23635. o Minor features:
  23636. - A wide variety of new unit tests by Esteban Manchado Velázquez.
  23637. - Shorten links in the tor-exit-notice file. Patch by Christian Kujau.
  23638. - Update to the March 6 2012 Maxmind GeoLite Country database.
  23639. Changes in version 0.2.3.12-alpha - 2012-02-13
  23640. Tor 0.2.3.12-alpha lets fast exit relays scale better, allows clients
  23641. to use bridges that run Tor 0.2.2.x, and resolves several big bugs
  23642. when Tor is configured to use a pluggable transport like obfsproxy.
  23643. o Major bugfixes:
  23644. - Fix builds when the path to sed, openssl, or sha1sum contains
  23645. spaces, which is pretty common on Windows. Fixes bug 5065; bugfix
  23646. on 0.2.2.1-alpha.
  23647. - Set the SO_REUSEADDR socket option before we call bind() on outgoing
  23648. connections. This change should allow busy exit relays to stop
  23649. running out of available sockets as quickly. Fixes bug 4950;
  23650. bugfix on 0.2.2.26-beta.
  23651. - Allow 0.2.3.x clients to use 0.2.2.x bridges. Previously the client
  23652. would ask the bridge for microdescriptors, which are only supported
  23653. in 0.2.3.x, and then fail to bootstrap when it didn't get the
  23654. answers it wanted. Fixes bug 4013; bugfix on 0.2.3.2-alpha.
  23655. - Properly set up obfsproxy's environment when in managed mode. The
  23656. Tor Browser Bundle needs LD_LIBRARY_PATH to be passed to obfsproxy,
  23657. and when you run your Tor as a daemon, there's no HOME. Fixes bugs
  23658. 5076 and 5082; bugfix on 0.2.3.6-alpha.
  23659. o Minor features:
  23660. - Use the dead_strip option when building Tor on OS X. This reduces
  23661. binary size by almost 19% when linking openssl and libevent
  23662. statically, which we do for Tor Browser Bundle.
  23663. - Fix broken URLs in the sample torrc file, and tell readers about
  23664. the OutboundBindAddress, ExitPolicyRejectPrivate, and
  23665. PublishServerDescriptor options. Addresses bug 4652.
  23666. - Update to the February 7 2012 Maxmind GeoLite Country database.
  23667. o Minor bugfixes:
  23668. - Downgrade the "We're missing a certificate" message from notice
  23669. to info: people kept mistaking it for a real problem, whereas it
  23670. is seldom the problem even when we are failing to bootstrap. Fixes
  23671. bug 5067; bugfix on 0.2.0.10-alpha.
  23672. - Don't put "TOR_PT_EXTENDED_SERVER_PORT=127.0.0.1:4200" in a
  23673. managed pluggable transport server proxy's environment.
  23674. Previously, we would put it there, even though Tor doesn't
  23675. implement an 'extended server port' yet, and even though Tor
  23676. almost certainly isn't listening at that address. For now, we set
  23677. it to an empty string to avoid crashing older obfsproxies. Bugfix
  23678. on 0.2.3.6-alpha.
  23679. - Log the heartbeat message every HeartbeatPeriod seconds, not every
  23680. HeartbeatPeriod + 1 seconds. Fixes bug 4942; bugfix on
  23681. 0.2.3.1-alpha. Bug reported by Scott Bennett.
  23682. - Calculate absolute paths correctly on Windows. Fixes bug 4973;
  23683. bugfix on 0.2.3.11-alpha.
  23684. - Update "ClientOnly" man page entry to explain that there isn't
  23685. really any point to messing with it. Resolves ticket 5005.
  23686. - Use the correct CVE number for CVE-2011-4576 in our comments and
  23687. log messages. Found by "fermenthor". Resolves bug 5066; bugfix on
  23688. 0.2.3.11-alpha.
  23689. o Code simplifications and refactoring:
  23690. - Use the _WIN32 macro throughout our code to detect Windows.
  23691. (Previously we had used the obsolete 'WIN32' and the idiosyncratic
  23692. 'MS_WINDOWS'.)
  23693. Changes in version 0.2.3.11-alpha - 2012-01-22
  23694. Tor 0.2.3.11-alpha marks feature-freeze for the 0.2.3 tree. It deploys
  23695. the last step of the plan to limit maximum circuit length, includes
  23696. a wide variety of hidden service performance and correctness fixes,
  23697. works around an OpenSSL security flaw if your distro is too stubborn
  23698. to upgrade, and fixes a bunch of smaller issues.
  23699. o Major features:
  23700. - Now that Tor 0.2.0.x is completely deprecated, enable the final
  23701. part of "Proposal 110: Avoiding infinite length circuits" by
  23702. refusing all circuit-extend requests that do not use a relay_early
  23703. cell. This change helps Tor resist a class of denial-of-service
  23704. attacks by limiting the maximum circuit length.
  23705. - Adjust the number of introduction points that a hidden service
  23706. will try to maintain based on how long its introduction points
  23707. remain in use and how many introductions they handle. Fixes
  23708. part of bug 3825.
  23709. - Try to use system facilities for enumerating local interface
  23710. addresses, before falling back to our old approach (which was
  23711. binding a UDP socket, and calling getsockname() on it). That
  23712. approach was scaring OS X users whose draconian firewall
  23713. software warned about binding to UDP sockets, regardless of
  23714. whether packets were sent. Now we try to use getifaddrs(),
  23715. SIOCGIFCONF, or GetAdaptersAddresses(), depending on what the
  23716. system supports. Resolves ticket 1827.
  23717. o Major security workaround:
  23718. - When building or running with any version of OpenSSL earlier
  23719. than 0.9.8s or 1.0.0f, disable SSLv3 support. These OpenSSL
  23720. versions have a bug (CVE-2011-4576) in which their block cipher
  23721. padding includes uninitialized data, potentially leaking sensitive
  23722. information to any peer with whom they make a SSLv3 connection. Tor
  23723. does not use SSL v3 by default, but a hostile client or server
  23724. could force an SSLv3 connection in order to gain information that
  23725. they shouldn't have been able to get. The best solution here is to
  23726. upgrade to OpenSSL 0.9.8s or 1.0.0f (or later). But when building
  23727. or running with a non-upgraded OpenSSL, we disable SSLv3 entirely
  23728. to make sure that the bug can't happen.
  23729. o Major bugfixes:
  23730. - Fix the SOCKET_OK test that we use to tell when socket
  23731. creation fails so that it works on Win64. Fixes part of bug 4533;
  23732. bugfix on 0.2.2.29-beta. Bug found by wanoskarnet.
  23733. - Correct our replacements for the timeradd() and timersub() functions
  23734. on platforms that lack them (for example, Windows). The timersub()
  23735. function is used when expiring circuits, while timeradd() is
  23736. currently unused. Bug report and patch by Vektor. Fixes bug 4778;
  23737. bugfix on 0.2.2.24-alpha and 0.2.3.1-alpha.
  23738. - Do not use OpenSSL 1.0.0's counter mode: it has a critical bug
  23739. that was fixed in OpenSSL 1.0.0a. We test for the counter mode
  23740. bug at runtime, not compile time, because some distributions hack
  23741. their OpenSSL to mis-report its version. Fixes bug 4779; bugfix
  23742. on 0.2.3.9-alpha. Found by Pascal.
  23743. o Minor features (controller):
  23744. - Use absolute path names when reporting the torrc filename in the
  23745. control protocol, so a controller can more easily find the torrc
  23746. file. Resolves bug 1101.
  23747. - Extend the control protocol to report flags that control a circuit's
  23748. path selection in CIRC events and in replies to 'GETINFO
  23749. circuit-status'. Implements part of ticket 2411.
  23750. - Extend the control protocol to report the hidden service address
  23751. and current state of a hidden-service-related circuit in CIRC
  23752. events and in replies to 'GETINFO circuit-status'. Implements part
  23753. of ticket 2411.
  23754. - When reporting the path to the cookie file to the controller,
  23755. give an absolute path. Resolves ticket 4881.
  23756. - Allow controllers to request an event notification whenever a
  23757. circuit is cannibalized or its purpose is changed. Implements
  23758. part of ticket 3457.
  23759. - Include the creation time of a circuit in CIRC and CIRC2
  23760. control-port events and the list produced by the 'GETINFO
  23761. circuit-status' control-port command.
  23762. o Minor features (directory authorities):
  23763. - Directory authorities now reject versions of Tor older than
  23764. 0.2.1.30, and Tor versions between 0.2.2.1-alpha and 0.2.2.20-alpha
  23765. inclusive. These versions accounted for only a small fraction of
  23766. the Tor network, and have numerous known security issues. Resolves
  23767. issue 4788.
  23768. - Authority operators can now vote for all relays in a given
  23769. set of countries to be BadDir/BadExit/Invalid/Rejected.
  23770. - Provide two consensus parameters (FastFlagMinThreshold and
  23771. FastFlagMaxThreshold) to control the range of allowable bandwidths
  23772. for the Fast directory flag. These allow authorities to run
  23773. experiments on appropriate requirements for being a "Fast" node.
  23774. The AuthDirFastGuarantee config value still applies. Implements
  23775. ticket 3946.
  23776. - Document the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays
  23777. directory authority option (introduced in Tor 0.2.2.34).
  23778. o Minor features (other):
  23779. - Don't disable the DirPort when we cannot exceed our AccountingMax
  23780. limit during this interval because the effective bandwidthrate is
  23781. low enough. This is useful in a situation where AccountMax is only
  23782. used as an additional safeguard or to provide statistics.
  23783. - Prepend an informative header to generated dynamic_dh_params files.
  23784. - If EntryNodes are given, but UseEntryGuards is set to 0, warn that
  23785. EntryNodes will have no effect. Resolves issue 2571.
  23786. - Log more useful messages when we fail to disable debugger
  23787. attachment.
  23788. - Log which authority we're missing votes from when we go to fetch
  23789. them from the other auths.
  23790. - Log (at debug level) whenever a circuit's purpose is changed.
  23791. - Add missing documentation for the MaxClientCircuitsPending,
  23792. UseMicrodescriptors, UserspaceIOCPBuffers, and
  23793. _UseFilteringSSLBufferevents options, all introduced during
  23794. the 0.2.3.x series.
  23795. - Update to the January 3 2012 Maxmind GeoLite Country database.
  23796. o Minor bugfixes (hidden services):
  23797. - Don't close hidden service client circuits which have almost
  23798. finished connecting to their destination when they reach
  23799. the normal circuit-build timeout. Previously, we would close
  23800. introduction circuits which are waiting for an acknowledgement
  23801. from the introduction point, and rendezvous circuits which have
  23802. been specified in an INTRODUCE1 cell sent to a hidden service,
  23803. after the normal CBT. Now, we mark them as 'timed out', and launch
  23804. another rendezvous attempt in parallel. This behavior change can
  23805. be disabled using the new CloseHSClientCircuitsImmediatelyOnTimeout
  23806. option. Fixes part of bug 1297; bugfix on 0.2.2.2-alpha.
  23807. - Don't close hidden-service-side rendezvous circuits when they
  23808. reach the normal circuit-build timeout. This behavior change can
  23809. be disabled using the new
  23810. CloseHSServiceRendCircuitsImmediatelyOnTimeout option. Fixes the
  23811. remaining part of bug 1297; bugfix on 0.2.2.2-alpha.
  23812. - Make sure we never mark the wrong rendezvous circuit as having
  23813. had its introduction cell acknowledged by the introduction-point
  23814. relay. Previously, when we received an INTRODUCE_ACK cell on a
  23815. client-side hidden-service introduction circuit, we might have
  23816. marked a rendezvous circuit other than the one we specified in
  23817. the INTRODUCE1 cell as INTRO_ACKED, which would have produced
  23818. a warning message and interfered with the hidden service
  23819. connection-establishment process. Fixes bug 4759; bugfix on
  23820. 0.2.3.3-alpha, when we added the stream-isolation feature which
  23821. might cause Tor to open multiple rendezvous circuits for the same
  23822. hidden service.
  23823. - Don't trigger an assertion failure when we mark a new client-side
  23824. hidden-service introduction circuit for close during the process
  23825. of creating it. Fixes bug 4796; bugfix on 0.2.3.6-alpha. Reported
  23826. by murb.
  23827. o Minor bugfixes (log messages):
  23828. - Correctly spell "connect" in a log message on failure to create a
  23829. controlsocket. Fixes bug 4803; bugfix on 0.2.2.26-beta and
  23830. 0.2.3.2-alpha.
  23831. - Fix a typo in a log message in rend_service_rendezvous_has_opened().
  23832. Fixes bug 4856; bugfix on Tor 0.0.6.
  23833. - Fix the log message describing how we work around discovering
  23834. that our version is the ill-fated OpenSSL 0.9.8l. Fixes bug
  23835. 4837; bugfix on 0.2.2.9-alpha.
  23836. - When logging about a disallowed .exit name, do not also call it
  23837. an "invalid onion address". Fixes bug 3325; bugfix on 0.2.2.9-alpha.
  23838. o Minor bugfixes (build fixes):
  23839. - During configure, detect when we're building with clang version
  23840. 3.0 or lower and disable the -Wnormalized=id and -Woverride-init
  23841. CFLAGS. clang doesn't support them yet.
  23842. - During configure, search for library containing cos function as
  23843. libm lives in libcore on some platforms (BeOS/Haiku). Linking
  23844. against libm was hard-coded before. Fixes the first part of bug
  23845. 4727; bugfix on 0.2.2.2-alpha. Patch and analysis by Martin Hebnes
  23846. Pedersen.
  23847. - Detect attempts to build Tor on (as yet hypothetical) versions
  23848. of Windows where sizeof(intptr_t) != sizeof(SOCKET). Partial
  23849. fix for bug 4533. Bugfix on 0.2.2.28-beta.
  23850. - Preprocessor directives should not be put inside the arguments
  23851. of a macro. This would break compilation with GCC releases prior
  23852. to version 3.3. We would never recommend such an old GCC version,
  23853. but it is apparently required for binary compatibility on some
  23854. platforms (namely, certain builds of Haiku). Fixes the other part
  23855. of bug 4727; bugfix on 0.2.3.3-alpha. Patch and analysis by Martin
  23856. Hebnes Pedersen.
  23857. o Minor bugfixes (other):
  23858. - Older Linux kernels erroneously respond to strange nmap behavior
  23859. by having accept() return successfully with a zero-length
  23860. socket. When this happens, just close the connection. Previously,
  23861. we would try harder to learn the remote address: but there was
  23862. no such remote address to learn, and our method for trying to
  23863. learn it was incorrect. Fixes bugs 1240, 4745, and 4747. Bugfix
  23864. on 0.1.0.3-rc. Reported and diagnosed by "r1eo".
  23865. - Fix null-pointer access that could occur if TLS allocation failed.
  23866. Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un". This was
  23867. erroneously listed as fixed in 0.2.3.9-alpha, but the fix had
  23868. accidentally been reverted.
  23869. - Fix our implementation of crypto_random_hostname() so it can't
  23870. overflow on ridiculously large inputs. (No Tor version has ever
  23871. provided this kind of bad inputs, but let's be correct in depth.)
  23872. Fixes bug 4413; bugfix on 0.2.2.9-alpha. Fix by Stephen Palmateer.
  23873. - Find more places in the code that should have been testing for
  23874. invalid sockets using the SOCKET_OK macro. Required for a fix
  23875. for bug 4533. Bugfix on 0.2.2.28-beta.
  23876. - Fix an assertion failure when, while running with bufferevents, a
  23877. connection finishes connecting after it is marked for close, but
  23878. before it is closed. Fixes bug 4697; bugfix on 0.2.3.1-alpha.
  23879. - test_util_spawn_background_ok() hardcoded the expected value
  23880. for ENOENT to 2. This isn't portable as error numbers are
  23881. platform specific, and particularly the hurd has ENOENT at
  23882. 0x40000002. Construct expected string at runtime, using the correct
  23883. value for ENOENT. Fixes bug 4733; bugfix on 0.2.3.1-alpha.
  23884. - Reject attempts to disable DisableDebuggerAttachment while Tor is
  23885. running. Fixes bug 4650; bugfix on 0.2.3.9-alpha.
  23886. - Use an appropriate-width type for sockets in tor-fw-helper on
  23887. win64. Fixes bug 1983 at last. Bugfix on 0.2.3.9-alpha.
  23888. o Feature removal:
  23889. - When sending or relaying a RELAY_EARLY cell, we used to convert
  23890. it to a RELAY cell if the connection was using the v1 link
  23891. protocol. This was a workaround for older versions of Tor, which
  23892. didn't handle RELAY_EARLY cells properly. Now that all supported
  23893. versions can handle RELAY_EARLY cells, and now that we're enforcing
  23894. the "no RELAY_EXTEND commands except in RELAY_EARLY cells" rule,
  23895. remove this workaround. Addresses bug 4786.
  23896. o Code simplifications and refactoring:
  23897. - Use OpenSSL's built-in SSL_state_string_long() instead of our
  23898. own homebrewed ssl_state_to_string() replacement. Patch from
  23899. Emile Snyder. Fixes bug 4653.
  23900. - Use macros to indicate OpenSSL versions, so we don't need to worry
  23901. about accidental hexadecimal bit shifts.
  23902. - Remove some workaround code for OpenSSL 0.9.6 (which is no longer
  23903. supported).
  23904. - Convert more instances of tor_snprintf+tor_strdup into tor_asprintf.
  23905. - Use the smartlist_add_asprintf() alias more consistently.
  23906. - Use a TOR_INVALID_SOCKET macro when initializing a socket to an
  23907. invalid value, rather than just -1.
  23908. - Rename a handful of old identifiers, mostly related to crypto
  23909. structures and crypto functions. By convention, our "create an
  23910. object" functions are called "type_new()", our "free an object"
  23911. functions are called "type_free()", and our types indicate that
  23912. they are types only with a final "_t". But a handful of older
  23913. types and functions broke these rules, with function names like
  23914. "type_create" or "subsystem_op_type", or with type names like
  23915. type_env_t.
  23916. Changes in version 0.2.3.10-alpha - 2011-12-16
  23917. Tor 0.2.3.10-alpha fixes a critical heap-overflow security issue in
  23918. Tor's buffers code. Absolutely everybody should upgrade.
  23919. The bug relied on an incorrect calculation when making data continuous
  23920. in one of our IO buffers, if the first chunk of the buffer was
  23921. misaligned by just the wrong amount. The miscalculation would allow an
  23922. attacker to overflow a piece of heap-allocated memory. To mount this
  23923. attack, the attacker would need to either open a SOCKS connection to
  23924. Tor's SocksPort (usually restricted to localhost), or target a Tor
  23925. instance configured to make its connections through a SOCKS proxy
  23926. (which Tor does not do by default).
  23927. Good security practice requires that all heap-overflow bugs should be
  23928. presumed to be exploitable until proven otherwise, so we are treating
  23929. this as a potential code execution attack. Please upgrade immediately!
  23930. This bug does not affect bufferevents-based builds of Tor. Special
  23931. thanks to "Vektor" for reporting this issue to us!
  23932. This release also contains a few minor bugfixes for issues discovered
  23933. in 0.2.3.9-alpha.
  23934. o Major bugfixes:
  23935. - Fix a heap overflow bug that could occur when trying to pull
  23936. data into the first chunk of a buffer, when that chunk had
  23937. already had some data drained from it. Fixes CVE-2011-2778;
  23938. bugfix on 0.2.0.16-alpha. Reported by "Vektor".
  23939. o Minor bugfixes:
  23940. - If we can't attach streams to a rendezvous circuit when we
  23941. finish connecting to a hidden service, clear the rendezvous
  23942. circuit's stream-isolation state and try to attach streams
  23943. again. Previously, we cleared rendezvous circuits' isolation
  23944. state either too early (if they were freshly built) or not at all
  23945. (if they had been built earlier and were cannibalized). Bugfix on
  23946. 0.2.3.3-alpha; fixes bug 4655.
  23947. - Fix compilation of the libnatpmp helper on non-Windows. Bugfix on
  23948. 0.2.3.9-alpha; fixes bug 4691. Reported by Anthony G. Basile.
  23949. - Fix an assertion failure when a relay with accounting enabled
  23950. starts up while dormant. Fixes bug 4702; bugfix on 0.2.3.9-alpha.
  23951. o Minor features:
  23952. - Update to the December 6 2011 Maxmind GeoLite Country database.
  23953. Changes in version 0.2.2.35 - 2011-12-16
  23954. Tor 0.2.2.35 fixes a critical heap-overflow security issue in Tor's
  23955. buffers code. Absolutely everybody should upgrade.
  23956. The bug relied on an incorrect calculation when making data continuous
  23957. in one of our IO buffers, if the first chunk of the buffer was
  23958. misaligned by just the wrong amount. The miscalculation would allow an
  23959. attacker to overflow a piece of heap-allocated memory. To mount this
  23960. attack, the attacker would need to either open a SOCKS connection to
  23961. Tor's SocksPort (usually restricted to localhost), or target a Tor
  23962. instance configured to make its connections through a SOCKS proxy
  23963. (which Tor does not do by default).
  23964. Good security practice requires that all heap-overflow bugs should be
  23965. presumed to be exploitable until proven otherwise, so we are treating
  23966. this as a potential code execution attack. Please upgrade immediately!
  23967. This bug does not affect bufferevents-based builds of Tor. Special
  23968. thanks to "Vektor" for reporting this issue to us!
  23969. Tor 0.2.2.35 also fixes several bugs in previous versions, including
  23970. crash bugs for unusual configurations, and a long-term bug that
  23971. would prevent Tor from starting on Windows machines with draconian
  23972. AV software.
  23973. With this release, we remind everyone that 0.2.0.x has reached its
  23974. formal end-of-life. Those Tor versions have many known flaws, and
  23975. nobody should be using them. You should upgrade -- ideally to the
  23976. 0.2.2.x series. If you're using a Linux or BSD and its packages are
  23977. obsolete, stop using those packages and upgrade anyway.
  23978. The Tor 0.2.1.x series is also approaching its end-of-life: it will no
  23979. longer receive support after some time in early 2012.
  23980. o Major bugfixes:
  23981. - Fix a heap overflow bug that could occur when trying to pull
  23982. data into the first chunk of a buffer, when that chunk had
  23983. already had some data drained from it. Fixes CVE-2011-2778;
  23984. bugfix on 0.2.0.16-alpha. Reported by "Vektor".
  23985. - Initialize Libevent with the EVENT_BASE_FLAG_NOLOCK flag enabled, so
  23986. that it doesn't attempt to allocate a socketpair. This could cause
  23987. some problems on Windows systems with overzealous firewalls. Fix for
  23988. bug 4457; workaround for Libevent versions 2.0.1-alpha through
  23989. 2.0.15-stable.
  23990. - If we mark an OR connection for close based on a cell we process,
  23991. don't process any further cells on it. We already avoid further
  23992. reads on marked-for-close connections, but now we also discard the
  23993. cells we'd already read. Fixes bug 4299; bugfix on 0.2.0.10-alpha,
  23994. which was the first version where we might mark a connection for
  23995. close based on processing a cell on it.
  23996. - Correctly sanity-check that we don't underflow on a memory
  23997. allocation (and then assert) for hidden service introduction
  23998. point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
  23999. bugfix on 0.2.1.5-alpha.
  24000. - Fix a memory leak when we check whether a hidden service
  24001. descriptor has any usable introduction points left. Fixes bug
  24002. 4424. Bugfix on 0.2.2.25-alpha.
  24003. - Don't crash when we're running as a relay and don't have a GeoIP
  24004. file. Bugfix on 0.2.2.34; fixes bug 4340. This backports a fix
  24005. we've had in the 0.2.3.x branch already.
  24006. - When running as a client, do not print a misleading (and plain
  24007. wrong) log message that we're collecting "directory request"
  24008. statistics: clients don't collect statistics. Also don't create a
  24009. useless (because empty) stats file in the stats/ directory. Fixes
  24010. bug 4353; bugfix on 0.2.2.34.
  24011. o Minor bugfixes:
  24012. - Detect failure to initialize Libevent. This fix provides better
  24013. detection for future instances of bug 4457.
  24014. - Avoid frequent calls to the fairly expensive cull_wedged_cpuworkers
  24015. function. This was eating up hideously large amounts of time on some
  24016. busy servers. Fixes bug 4518; bugfix on 0.0.9.8.
  24017. - Resolve an integer overflow bug in smartlist_ensure_capacity().
  24018. Fixes bug 4230; bugfix on Tor 0.1.0.1-rc. Based on a patch by
  24019. Mansour Moufid.
  24020. - Don't warn about unused log_mutex in log.c when building with
  24021. --disable-threads using a recent GCC. Fixes bug 4437; bugfix on
  24022. 0.1.0.6-rc which introduced --disable-threads.
  24023. - When configuring, starting, or stopping an NT service, stop
  24024. immediately after the service configuration attempt has succeeded
  24025. or failed. Fixes bug 3963; bugfix on 0.2.0.7-alpha.
  24026. - When sending a NETINFO cell, include the original address
  24027. received for the other side, not its canonical address. Found
  24028. by "troll_un"; fixes bug 4349; bugfix on 0.2.0.10-alpha.
  24029. - Fix a typo in a hibernation-related log message. Fixes bug 4331;
  24030. bugfix on 0.2.2.23-alpha; found by "tmpname0901".
  24031. - Fix a memory leak in launch_direct_bridge_descriptor_fetch() that
  24032. occurred when a client tried to fetch a descriptor for a bridge
  24033. in ExcludeNodes. Fixes bug 4383; bugfix on 0.2.2.25-alpha.
  24034. - Backport fixes for a pair of compilation warnings on Windows.
  24035. Fixes bug 4521; bugfix on 0.2.2.28-beta and on 0.2.2.29-beta.
  24036. - If we had ever tried to call tor_addr_to_str on an address of
  24037. unknown type, we would have done a strdup on an uninitialized
  24038. buffer. Now we won't. Fixes bug 4529; bugfix on 0.2.1.3-alpha.
  24039. Reported by "troll_un".
  24040. - Correctly detect and handle transient lookup failures from
  24041. tor_addr_lookup. Fixes bug 4530; bugfix on 0.2.1.5-alpha.
  24042. Reported by "troll_un".
  24043. - Fix null-pointer access that could occur if TLS allocation failed.
  24044. Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un".
  24045. - Use tor_socket_t type for listener argument to accept(). Fixes bug
  24046. 4535; bugfix on 0.2.2.28-beta. Found by "troll_un".
  24047. o Minor features:
  24048. - Add two new config options for directory authorities:
  24049. AuthDirFastGuarantee sets a bandwidth threshold for guaranteeing the
  24050. Fast flag, and AuthDirGuardBWGuarantee sets a bandwidth threshold
  24051. that is always sufficient to satisfy the bandwidth requirement for
  24052. the Guard flag. Now it will be easier for researchers to simulate
  24053. Tor networks with different values. Resolves ticket 4484.
  24054. - When Tor ignores a hidden service specified in its configuration,
  24055. include the hidden service's directory in the warning message.
  24056. Previously, we would only tell the user that some hidden service
  24057. was ignored. Bugfix on 0.0.6; fixes bug 4426.
  24058. - Update to the December 6 2011 Maxmind GeoLite Country database.
  24059. o Packaging changes:
  24060. - Make it easier to automate expert package builds on Windows,
  24061. by removing an absolute path from makensis.exe command.
  24062. Changes in version 0.2.1.32 - 2011-12-16
  24063. Tor 0.2.1.32 backports important security and privacy fixes for
  24064. oldstable. This release is intended only for package maintainers and
  24065. others who cannot use the 0.2.2 stable series. All others should be
  24066. using Tor 0.2.2.x or newer.
  24067. The Tor 0.2.1.x series will reach formal end-of-life some time in
  24068. early 2012; we will stop releasing patches for it then.
  24069. o Major bugfixes (also included in 0.2.2.x):
  24070. - Correctly sanity-check that we don't underflow on a memory
  24071. allocation (and then assert) for hidden service introduction
  24072. point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
  24073. bugfix on 0.2.1.5-alpha.
  24074. - Fix a heap overflow bug that could occur when trying to pull
  24075. data into the first chunk of a buffer, when that chunk had
  24076. already had some data drained from it. Fixes CVE-2011-2778;
  24077. bugfix on 0.2.0.16-alpha. Reported by "Vektor".
  24078. o Minor features:
  24079. - Update to the December 6 2011 Maxmind GeoLite Country database.
  24080. Changes in version 0.2.3.9-alpha - 2011-12-08
  24081. Tor 0.2.3.9-alpha introduces initial IPv6 support for bridges, adds
  24082. a "DisableNetwork" security feature that bundles can use to avoid
  24083. touching the network until bridges are configured, moves forward on
  24084. the pluggable transport design, fixes a flaw in the hidden service
  24085. design that unnecessarily prevented clients with wrong clocks from
  24086. reaching hidden services, and fixes a wide variety of other issues.
  24087. o Major features:
  24088. - Clients can now connect to private bridges over IPv6. Bridges
  24089. still need at least one IPv4 address in order to connect to
  24090. other relays. Note that we don't yet handle the case where the
  24091. user has two bridge lines for the same bridge (one IPv4, one
  24092. IPv6). Implements parts of proposal 186.
  24093. - New "DisableNetwork" config option to prevent Tor from launching any
  24094. connections or accepting any connections except on a control port.
  24095. Bundles and controllers can set this option before letting Tor talk
  24096. to the rest of the network, for example to prevent any connections
  24097. to a non-bridge address. Packages like Orbot can also use this
  24098. option to instruct Tor to save power when the network is off.
  24099. - Clients and bridges can now be configured to use a separate
  24100. "transport" proxy. This approach makes the censorship arms race
  24101. easier by allowing bridges to use protocol obfuscation plugins. It
  24102. implements the "managed proxy" part of proposal 180 (ticket 3472).
  24103. - When using OpenSSL 1.0.0 or later, use OpenSSL's counter mode
  24104. implementation. It makes AES_CTR about 7% faster than our old one
  24105. (which was about 10% faster than the one OpenSSL used to provide).
  24106. Resolves ticket 4526.
  24107. - Add a "tor2web mode" for clients that want to connect to hidden
  24108. services non-anonymously (and possibly more quickly). As a safety
  24109. measure to try to keep users from turning this on without knowing
  24110. what they are doing, tor2web mode must be explicitly enabled at
  24111. compile time, and a copy of Tor compiled to run in tor2web mode
  24112. cannot be used as a normal Tor client. Implements feature 2553.
  24113. - Add experimental support for running on Windows with IOCP and no
  24114. kernel-space socket buffers. This feature is controlled by a new
  24115. "UserspaceIOCPBuffers" config option (off by default), which has
  24116. no effect unless Tor has been built with support for bufferevents,
  24117. is running on Windows, and has enabled IOCP. This may, in the long
  24118. run, help solve or mitigate bug 98.
  24119. - Use a more secure consensus parameter voting algorithm. Now at
  24120. least three directory authorities or a majority of them must
  24121. vote on a given parameter before it will be included in the
  24122. consensus. Implements proposal 178.
  24123. o Major bugfixes:
  24124. - Hidden services now ignore the timestamps on INTRODUCE2 cells.
  24125. They used to check that the timestamp was within 30 minutes
  24126. of their system clock, so they could cap the size of their
  24127. replay-detection cache, but that approach unnecessarily refused
  24128. service to clients with wrong clocks. Bugfix on 0.2.1.6-alpha, when
  24129. the v3 intro-point protocol (the first one which sent a timestamp
  24130. field in the INTRODUCE2 cell) was introduced; fixes bug 3460.
  24131. - Only use the EVP interface when AES acceleration is enabled,
  24132. to avoid a 5-7% performance regression. Resolves issue 4525;
  24133. bugfix on 0.2.3.8-alpha.
  24134. o Privacy/anonymity features (bridge detection):
  24135. - Make bridge SSL certificates a bit more stealthy by using random
  24136. serial numbers, in the same fashion as OpenSSL when generating
  24137. self-signed certificates. Implements ticket 4584.
  24138. - Introduce a new config option "DynamicDHGroups", enabled by
  24139. default, which provides each bridge with a unique prime DH modulus
  24140. to be used during SSL handshakes. This option attempts to help
  24141. against censors who might use the Apache DH modulus as a static
  24142. identifier for bridges. Addresses ticket 4548.
  24143. o Minor features (new/different config options):
  24144. - New configuration option "DisableDebuggerAttachment" (on by default)
  24145. to prevent basic debugging attachment attempts by other processes.
  24146. Supports Mac OS X and Gnu/Linux. Resolves ticket 3313.
  24147. - Allow MapAddress directives to specify matches against super-domains,
  24148. as in "MapAddress *.torproject.org *.torproject.org.torserver.exit".
  24149. Implements issue 933.
  24150. - Slightly change behavior of "list" options (that is, config
  24151. options that can appear more than once) when they appear both in
  24152. torrc and on the command line. Previously, the command-line options
  24153. would be appended to the ones from torrc. Now, the command-line
  24154. options override the torrc options entirely. This new behavior
  24155. allows the user to override list options (like exit policies and
  24156. ports to listen on) from the command line, rather than simply
  24157. appending to the list.
  24158. - You can get the old (appending) command-line behavior for "list"
  24159. options by prefixing the option name with a "+".
  24160. - You can remove all the values for a "list" option from the command
  24161. line without adding any new ones by prefixing the option name
  24162. with a "/".
  24163. - Add experimental support for a "defaults" torrc file to be parsed
  24164. before the regular torrc. Torrc options override the defaults file's
  24165. options in the same way that the command line overrides the torrc.
  24166. The SAVECONF controller command saves only those options which
  24167. differ between the current configuration and the defaults file. HUP
  24168. reloads both files. (Note: This is an experimental feature; its
  24169. behavior will probably be refined in future 0.2.3.x-alpha versions
  24170. to better meet packagers' needs.) Implements task 4552.
  24171. o Minor features:
  24172. - Try to make the introductory warning message that Tor prints on
  24173. startup more useful for actually finding help and information.
  24174. Resolves ticket 2474.
  24175. - Running "make version" now displays the version of Tor that
  24176. we're about to build. Idea from katmagic; resolves issue 4400.
  24177. - Expire old or over-used hidden service introduction points.
  24178. Required by fix for bug 3460.
  24179. - Move the replay-detection cache for the RSA-encrypted parts of
  24180. INTRODUCE2 cells to the introduction point data structures.
  24181. Previously, we would use one replay-detection cache per hidden
  24182. service. Required by fix for bug 3460.
  24183. - Reduce the lifetime of elements of hidden services' Diffie-Hellman
  24184. public key replay-detection cache from 60 minutes to 5 minutes. This
  24185. replay-detection cache is now used only to detect multiple
  24186. INTRODUCE2 cells specifying the same rendezvous point, so we can
  24187. avoid launching multiple simultaneous attempts to connect to it.
  24188. o Minor bugfixes (on Tor 0.2.2.x and earlier):
  24189. - Resolve an integer overflow bug in smartlist_ensure_capacity().
  24190. Fixes bug 4230; bugfix on Tor 0.1.0.1-rc. Based on a patch by
  24191. Mansour Moufid.
  24192. - Fix a minor formatting issue in one of tor-gencert's error messages.
  24193. Fixes bug 4574.
  24194. - Prevent a false positive from the check-spaces script, by disabling
  24195. the "whitespace between function name and (" check for functions
  24196. named 'op()'.
  24197. - Fix a log message suggesting that people contact a non-existent
  24198. email address. Fixes bug 3448.
  24199. - Fix null-pointer access that could occur if TLS allocation failed.
  24200. Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un".
  24201. - Report a real bootstrap problem to the controller on router
  24202. identity mismatch. Previously we just said "foo", which probably
  24203. made a lot of sense at the time. Fixes bug 4169; bugfix on
  24204. 0.2.1.1-alpha.
  24205. - If we had ever tried to call tor_addr_to_str() on an address of
  24206. unknown type, we would have done a strdup() on an uninitialized
  24207. buffer. Now we won't. Fixes bug 4529; bugfix on 0.2.1.3-alpha.
  24208. Reported by "troll_un".
  24209. - Correctly detect and handle transient lookup failures from
  24210. tor_addr_lookup(). Fixes bug 4530; bugfix on 0.2.1.5-alpha.
  24211. Reported by "troll_un".
  24212. - Use tor_socket_t type for listener argument to accept(). Fixes bug
  24213. 4535; bugfix on 0.2.2.28-beta. Found by "troll_un".
  24214. - Initialize conn->addr to a valid state in spawn_cpuworker(). Fixes
  24215. bug 4532; found by "troll_un".
  24216. o Minor bugfixes (on Tor 0.2.3.x):
  24217. - Fix a compile warning in tor_inet_pton(). Bugfix on 0.2.3.8-alpha;
  24218. fixes bug 4554.
  24219. - Don't send two ESTABLISH_RENDEZVOUS cells when opening a new
  24220. circuit for use as a hidden service client's rendezvous point.
  24221. Fixes bugs 4641 and 4171; bugfix on 0.2.3.3-alpha. Diagnosed
  24222. with help from wanoskarnet.
  24223. - Restore behavior of overriding SocksPort, ORPort, and similar
  24224. options from the command line. Bugfix on 0.2.3.3-alpha.
  24225. o Build fixes:
  24226. - Properly handle the case where the build-tree is not the same
  24227. as the source tree when generating src/common/common_sha1.i,
  24228. src/or/micro-revision.i, and src/or/or_sha1.i. Fixes bug 3953;
  24229. bugfix on 0.2.0.1-alpha.
  24230. o Code simplifications, cleanups, and refactorings:
  24231. - Remove the pure attribute from all functions that used it
  24232. previously. In many cases we assigned it incorrectly, because the
  24233. functions might assert or call impure functions, and we don't have
  24234. evidence that keeping the pure attribute is worthwhile. Implements
  24235. changes suggested in ticket 4421.
  24236. - Remove some dead code spotted by coverity. Fixes cid 432.
  24237. Bugfix on 0.2.3.1-alpha, closes bug 4637.
  24238. Changes in version 0.2.3.8-alpha - 2011-11-22
  24239. Tor 0.2.3.8-alpha fixes some crash and assert bugs, including a
  24240. socketpair-related bug that has been bothering Windows users. It adds
  24241. support to serve microdescriptors to controllers, so Vidalia's network
  24242. map can resume listing relays (once Vidalia implements its side),
  24243. and adds better support for hardware AES acceleration. Finally, it
  24244. starts the process of adjusting the bandwidth cutoff for getting the
  24245. "Fast" flag from 20KB to (currently) 32KB -- preliminary results show
  24246. that tiny relays harm performance more than they help network capacity.
  24247. o Major bugfixes:
  24248. - Initialize Libevent with the EVENT_BASE_FLAG_NOLOCK flag enabled, so
  24249. that it doesn't attempt to allocate a socketpair. This could cause
  24250. some problems on Windows systems with overzealous firewalls. Fix for
  24251. bug 4457; workaround for Libevent versions 2.0.1-alpha through
  24252. 2.0.15-stable.
  24253. - Correctly sanity-check that we don't underflow on a memory
  24254. allocation (and then assert) for hidden service introduction
  24255. point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
  24256. bugfix on 0.2.1.5-alpha.
  24257. - Remove the artificially low cutoff of 20KB to guarantee the Fast
  24258. flag. In the past few years the average relay speed has picked
  24259. up, and while the "top 7/8 of the network get the Fast flag" and
  24260. "all relays with 20KB or more of capacity get the Fast flag" rules
  24261. used to have the same result, now the top 7/8 of the network has
  24262. a capacity more like 32KB. Bugfix on 0.2.1.14-rc. Fixes bug 4489.
  24263. - Fix a rare assertion failure when checking whether a v0 hidden
  24264. service descriptor has any usable introduction points left, and
  24265. we don't have enough information to build a circuit to the first
  24266. intro point named in the descriptor. The HS client code in
  24267. 0.2.3.x no longer uses v0 HS descriptors, but this assertion can
  24268. trigger on (and crash) v0 HS authorities. Fixes bug 4411.
  24269. Bugfix on 0.2.3.1-alpha; diagnosed by frosty_un.
  24270. - Make bridge authorities not crash when they are asked for their own
  24271. descriptor. Bugfix on 0.2.3.7-alpha, reported by Lucky Green.
  24272. - When running as a client, do not print a misleading (and plain
  24273. wrong) log message that we're collecting "directory request"
  24274. statistics: clients don't collect statistics. Also don't create a
  24275. useless (because empty) stats file in the stats/ directory. Fixes
  24276. bug 4353; bugfix on 0.2.2.34 and 0.2.3.7-alpha.
  24277. o Major features:
  24278. - Allow Tor controllers like Vidalia to obtain the microdescriptor
  24279. for a relay by identity digest or nickname. Previously,
  24280. microdescriptors were only available by their own digests, so a
  24281. controller would have to ask for and parse the whole microdescriptor
  24282. consensus in order to look up a single relay's microdesc. Fixes
  24283. bug 3832; bugfix on 0.2.3.1-alpha.
  24284. - Use OpenSSL's EVP interface for AES encryption, so that all AES
  24285. operations can use hardware acceleration (if present). Resolves
  24286. ticket 4442.
  24287. o Minor bugfixes (on 0.2.2.x and earlier):
  24288. - Detect failure to initialize Libevent. This fix provides better
  24289. detection for future instances of bug 4457.
  24290. - Avoid frequent calls to the fairly expensive cull_wedged_cpuworkers
  24291. function. This was eating up hideously large amounts of time on some
  24292. busy servers. Fixes bug 4518; bugfix on 0.0.9.8.
  24293. - Don't warn about unused log_mutex in log.c when building with
  24294. --disable-threads using a recent GCC. Fixes bug 4437; bugfix on
  24295. 0.1.0.6-rc which introduced --disable-threads.
  24296. - Allow manual 'authenticate' commands to the controller interface
  24297. from netcat (nc) as well as telnet. We were rejecting them because
  24298. they didn't come with the expected whitespace at the end of the
  24299. command. Bugfix on 0.1.1.1-alpha; fixes bug 2893.
  24300. - Fix some (not actually triggerable) buffer size checks in usage of
  24301. tor_inet_ntop. Fixes bug 4434; bugfix on Tor 0.2.0.1-alpha. Patch
  24302. by Anders Sundman.
  24303. - Fix parsing of some corner-cases with tor_inet_pton(). Fixes
  24304. bug 4515; bugfix on 0.2.0.1-alpha; fix by Anders Sundman.
  24305. - When configuring, starting, or stopping an NT service, stop
  24306. immediately after the service configuration attempt has succeeded
  24307. or failed. Fixes bug 3963; bugfix on 0.2.0.7-alpha.
  24308. - When sending a NETINFO cell, include the original address
  24309. received for the other side, not its canonical address. Found
  24310. by "troll_un"; fixes bug 4349; bugfix on 0.2.0.10-alpha.
  24311. - Rename the bench_{aes,dmap} functions to test_*, so that tinytest
  24312. can pick them up when the tests aren't disabled. Bugfix on
  24313. 0.2.2.4-alpha which introduced tinytest.
  24314. - Fix a memory leak when we check whether a hidden service
  24315. descriptor has any usable introduction points left. Fixes bug
  24316. 4424. Bugfix on 0.2.2.25-alpha.
  24317. - Fix a memory leak in launch_direct_bridge_descriptor_fetch() that
  24318. occurred when a client tried to fetch a descriptor for a bridge
  24319. in ExcludeNodes. Fixes bug 4383; bugfix on 0.2.2.25-alpha.
  24320. o Minor bugfixes (on 0.2.3.x):
  24321. - Make util unit tests build correctly with MSVC. Bugfix on
  24322. 0.2.3.3-alpha. Patch by Gisle Vanem.
  24323. - Successfully detect AUTH_CHALLENGE cells with no recognized
  24324. authentication type listed. Fixes bug 4367; bugfix on 0.2.3.6-alpha.
  24325. Found by frosty_un.
  24326. - If a relay receives an AUTH_CHALLENGE cell it can't answer,
  24327. it should still send a NETINFO cell to allow the connection to
  24328. become open. Fixes bug 4368; fix on 0.2.3.6-alpha; bug found by
  24329. "frosty".
  24330. - Log less loudly when we get an invalid authentication certificate
  24331. from a source other than a directory authority: it's not unusual
  24332. to see invalid certs because of clock skew. Fixes bug 4370; bugfix
  24333. on 0.2.3.6-alpha.
  24334. - Tolerate servers with more clock skew in their authentication
  24335. certificates than previously. Fixes bug 4371; bugfix on
  24336. 0.2.3.6-alpha.
  24337. - Fix a couple of compile warnings on Windows. Fixes bug 4469; bugfix
  24338. on 0.2.3.4-alpha and 0.2.3.6-alpha.
  24339. o Minor features:
  24340. - Add two new config options for directory authorities:
  24341. AuthDirFastGuarantee sets a bandwidth threshold for guaranteeing the
  24342. Fast flag, and AuthDirGuardBWGuarantee sets a bandwidth threshold
  24343. that is always sufficient to satisfy the bandwidth requirement for
  24344. the Guard flag. Now it will be easier for researchers to simulate
  24345. Tor networks with different values. Resolves ticket 4484.
  24346. - When Tor ignores a hidden service specified in its configuration,
  24347. include the hidden service's directory in the warning message.
  24348. Previously, we would only tell the user that some hidden service
  24349. was ignored. Bugfix on 0.0.6; fixes bug 4426.
  24350. - When we fail to initialize Libevent, retry with IOCP disabled so we
  24351. don't need to turn on multi-threading support in Libevent, which in
  24352. turn requires a working socketpair(). This is a workaround for bug
  24353. 4457, which affects Libevent versions from 2.0.1-alpha through
  24354. 2.0.15-stable.
  24355. - Detect when we try to build on a platform that doesn't define
  24356. AF_UNSPEC to 0. We don't work there, so refuse to compile.
  24357. - Update to the November 1 2011 Maxmind GeoLite Country database.
  24358. o Packaging changes:
  24359. - Make it easier to automate expert package builds on Windows,
  24360. by removing an absolute path from makensis.exe command.
  24361. o Code simplifications and refactoring:
  24362. - Remove some redundant #include directives throughout the code.
  24363. Patch from Andrea Gelmini.
  24364. - Unconditionally use OpenSSL's AES implementation instead of our
  24365. old built-in one. OpenSSL's AES has been better for a while, and
  24366. relatively few servers should still be on any version of OpenSSL
  24367. that doesn't have good optimized assembly AES.
  24368. - Use the name "CERTS" consistently to refer to the new cell type;
  24369. we were calling it CERT in some places and CERTS in others.
  24370. o Testing:
  24371. - Numerous new unit tests for functions in util.c and address.c by
  24372. Anders Sundman.
  24373. - The long-disabled benchmark tests are now split into their own
  24374. ./src/test/bench binary.
  24375. - The benchmark tests can now use more accurate timers than
  24376. gettimeofday() when such timers are available.
  24377. Changes in version 0.2.3.7-alpha - 2011-10-30
  24378. Tor 0.2.3.7-alpha fixes a crash bug in 0.2.3.6-alpha introduced by
  24379. the new v3 handshake. It also resolves yet another bridge address
  24380. enumeration issue.
  24381. o Major bugfixes:
  24382. - If we mark an OR connection for close based on a cell we process,
  24383. don't process any further cells on it. We already avoid further
  24384. reads on marked-for-close connections, but now we also discard the
  24385. cells we'd already read. Fixes bug 4299; bugfix on 0.2.0.10-alpha,
  24386. which was the first version where we might mark a connection for
  24387. close based on processing a cell on it.
  24388. - Fix a double-free bug that would occur when we received an invalid
  24389. certificate in a CERT cell in the new v3 handshake. Fixes bug 4343;
  24390. bugfix on 0.2.3.6-alpha.
  24391. - Bridges no longer include their address in NETINFO cells on outgoing
  24392. OR connections, to allow them to blend in better with clients.
  24393. Removes another avenue for enumerating bridges. Reported by
  24394. "troll_un". Fixes bug 4348; bugfix on 0.2.0.10-alpha, when NETINFO
  24395. cells were introduced.
  24396. o Trivial fixes:
  24397. - Fixed a typo in a hibernation-related log message. Fixes bug 4331;
  24398. bugfix on 0.2.2.23-alpha; found by "tmpname0901".
  24399. Changes in version 0.2.3.6-alpha - 2011-10-26
  24400. Tor 0.2.3.6-alpha includes the fix from 0.2.2.34 for a critical
  24401. anonymity vulnerability where an attacker can deanonymize Tor
  24402. users. Everybody should upgrade.
  24403. This release also features support for a new v3 connection handshake
  24404. protocol, and fixes to make hidden service connections more robust.
  24405. o Major features:
  24406. - Implement a new handshake protocol (v3) for authenticating Tors to
  24407. each other over TLS. It should be more resistant to fingerprinting
  24408. than previous protocols, and should require less TLS hacking for
  24409. future Tor implementations. Implements proposal 176.
  24410. - Allow variable-length padding cells to disguise the length of
  24411. Tor's TLS records. Implements part of proposal 184.
  24412. o Privacy/anonymity fixes (clients):
  24413. - Clients and bridges no longer send TLS certificate chains on
  24414. outgoing OR connections. Previously, each client or bridge would
  24415. use the same cert chain for all outgoing OR connections until
  24416. its IP address changes, which allowed any relay that the client
  24417. or bridge contacted to determine which entry guards it is using.
  24418. Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
  24419. - If a relay receives a CREATE_FAST cell on a TLS connection, it
  24420. no longer considers that connection as suitable for satisfying a
  24421. circuit EXTEND request. Now relays can protect clients from the
  24422. CVE-2011-2768 issue even if the clients haven't upgraded yet.
  24423. - Directory authorities no longer assign the Guard flag to relays
  24424. that haven't upgraded to the above "refuse EXTEND requests
  24425. to client connections" fix. Now directory authorities can
  24426. protect clients from the CVE-2011-2768 issue even if neither
  24427. the clients nor the relays have upgraded yet. There's a new
  24428. "GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays" config option
  24429. to let us transition smoothly, else tomorrow there would be no
  24430. guard relays.
  24431. o Major bugfixes (hidden services):
  24432. - Improve hidden service robustness: when an attempt to connect to
  24433. a hidden service ends, be willing to refetch its hidden service
  24434. descriptors from each of the HSDir relays responsible for them
  24435. immediately. Previously, we would not consider refetching the
  24436. service's descriptors from each HSDir for 15 minutes after the last
  24437. fetch, which was inconvenient if the hidden service was not running
  24438. during the first attempt. Bugfix on 0.2.0.18-alpha; fixes bug 3335.
  24439. - When one of a hidden service's introduction points appears to be
  24440. unreachable, stop trying it. Previously, we would keep trying
  24441. to build circuits to the introduction point until we lost the
  24442. descriptor, usually because the user gave up and restarted Tor.
  24443. Partly fixes bug 3825.
  24444. - Don't launch a useless circuit after failing to use one of a
  24445. hidden service's introduction points. Previously, we would
  24446. launch a new introduction circuit, but not set the hidden service
  24447. which that circuit was intended to connect to, so it would never
  24448. actually be used. A different piece of code would then create a
  24449. new introduction circuit correctly. Bug reported by katmagic and
  24450. found by Sebastian Hahn. Bugfix on 0.2.1.13-alpha; fixes bug 4212.
  24451. o Major bugfixes (other):
  24452. - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
  24453. that they initiated. Relays could distinguish incoming bridge
  24454. connections from client connections, creating another avenue for
  24455. enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
  24456. Found by "frosty_un".
  24457. - Don't update the AccountingSoftLimitHitAt state file entry whenever
  24458. tor gets started. This prevents a wrong average bandwidth
  24459. estimate, which would cause relays to always start a new accounting
  24460. interval at the earliest possible moment. Fixes bug 2003; bugfix
  24461. on 0.2.2.7-alpha. Reported by BryonEldridge, who also helped
  24462. immensely in tracking this bug down.
  24463. - Fix a crash bug when changing node restrictions while a DNS lookup
  24464. is in-progress. Fixes bug 4259; bugfix on 0.2.2.25-alpha. Bugfix
  24465. by "Tey'".
  24466. o Minor bugfixes (on 0.2.2.x and earlier):
  24467. - When a hidden service turns an extra service-side introduction
  24468. circuit into a general-purpose circuit, free the rend_data and
  24469. intro_key fields first, so we won't leak memory if the circuit
  24470. is cannibalized for use as another service-side introduction
  24471. circuit. Bugfix on 0.2.1.7-alpha; fixes bug 4251.
  24472. - Rephrase the log message emitted if the TestSocks check is
  24473. successful. Patch from Fabian Keil; fixes bug 4094.
  24474. - Bridges now skip DNS self-tests, to act a little more stealthily.
  24475. Fixes bug 4201; bugfix on 0.2.0.3-alpha, which first introduced
  24476. bridges. Patch by "warms0x".
  24477. - Remove a confusing dollar sign from the example fingerprint in the
  24478. man page, and also make the example fingerprint a valid one. Fixes
  24479. bug 4309; bugfix on 0.2.1.3-alpha.
  24480. - Fix internal bug-checking logic that was supposed to catch
  24481. failures in digest generation so that it will fail more robustly
  24482. if we ask for a nonexistent algorithm. Found by Coverity Scan.
  24483. Bugfix on 0.2.2.1-alpha; fixes Coverity CID 479.
  24484. - Report any failure in init_keys() calls launched because our
  24485. IP address has changed. Spotted by Coverity Scan. Bugfix on
  24486. 0.1.1.4-alpha; fixes CID 484.
  24487. o Minor bugfixes (on 0.2.3.x):
  24488. - Fix a bug in configure.in that kept it from building a configure
  24489. script with autoconf versions earlier than 2.61. Fixes bug 2430;
  24490. bugfix on 0.2.3.1-alpha.
  24491. - Don't warn users that they are exposing a client port to the
  24492. Internet if they have specified an RFC1918 address. Previously,
  24493. we would warn if the user had specified any non-loopback
  24494. address. Bugfix on 0.2.3.3-alpha. Fixes bug 4018; reported by Tas.
  24495. - Fix memory leaks in the failing cases of the new SocksPort and
  24496. ControlPort code. Found by Coverity Scan. Bugfix on 0.2.3.3-alpha;
  24497. fixes coverity CIDs 485, 486, and 487.
  24498. o Minor features:
  24499. - When a hidden service's introduction point times out, consider
  24500. trying it again during the next attempt to connect to the
  24501. HS. Previously, we would not try it again unless a newly fetched
  24502. descriptor contained it. Required by fixes for bugs 1297 and 3825.
  24503. - The next version of Windows will be called Windows 8, and it has
  24504. a major version of 6, minor version of 2. Correctly identify that
  24505. version instead of calling it "Very recent version". Resolves
  24506. ticket 4153; reported by funkstar.
  24507. - The Bridge Authority now writes statistics on how many bridge
  24508. descriptors it gave out in total, and how many unique descriptors
  24509. it gave out. It also lists how often the most and least commonly
  24510. fetched descriptors were given out, as well as the median and
  24511. 25th/75th percentile. Implements tickets 4200 and 4294.
  24512. - Update to the October 4 2011 Maxmind GeoLite Country database.
  24513. o Code simplifications and refactoring:
  24514. - Remove some old code to remember statistics about which descriptors
  24515. we've served as a directory mirror. The feature wasn't used and
  24516. is outdated now that microdescriptors are around.
  24517. - Rename Tor functions that turn strings into addresses, so that
  24518. "parse" indicates that no hostname resolution occurs, and
  24519. "lookup" indicates that hostname resolution may occur. This
  24520. should help prevent mistakes in the future. Fixes bug 3512.
  24521. Changes in version 0.2.2.34 - 2011-10-26
  24522. Tor 0.2.2.34 fixes a critical anonymity vulnerability where an attacker
  24523. can deanonymize Tor users. Everybody should upgrade.
  24524. The attack relies on four components: 1) Clients reuse their TLS cert
  24525. when talking to different relays, so relays can recognize a user by
  24526. the identity key in her cert. 2) An attacker who knows the client's
  24527. identity key can probe each guard relay to see if that identity key
  24528. is connected to that guard relay right now. 3) A variety of active
  24529. attacks in the literature (starting from "Low-Cost Traffic Analysis
  24530. of Tor" by Murdoch and Danezis in 2005) allow a malicious website to
  24531. discover the guard relays that a Tor user visiting the website is using.
  24532. 4) Clients typically pick three guards at random, so the set of guards
  24533. for a given user could well be a unique fingerprint for her. This
  24534. release fixes components #1 and #2, which is enough to block the attack;
  24535. the other two remain as open research problems. Special thanks to
  24536. "frosty_un" for reporting the issue to us!
  24537. Clients should upgrade so they are no longer recognizable by the TLS
  24538. certs they present. Relays should upgrade so they no longer allow a
  24539. remote attacker to probe them to test whether unpatched clients are
  24540. currently connected to them.
  24541. This release also fixes several vulnerabilities that allow an attacker
  24542. to enumerate bridge relays. Some bridge enumeration attacks still
  24543. remain; see for example proposal 188.
  24544. o Privacy/anonymity fixes (clients):
  24545. - Clients and bridges no longer send TLS certificate chains on
  24546. outgoing OR connections. Previously, each client or bridge would
  24547. use the same cert chain for all outgoing OR connections until
  24548. its IP address changes, which allowed any relay that the client
  24549. or bridge contacted to determine which entry guards it is using.
  24550. Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
  24551. - If a relay receives a CREATE_FAST cell on a TLS connection, it
  24552. no longer considers that connection as suitable for satisfying a
  24553. circuit EXTEND request. Now relays can protect clients from the
  24554. CVE-2011-2768 issue even if the clients haven't upgraded yet.
  24555. - Directory authorities no longer assign the Guard flag to relays
  24556. that haven't upgraded to the above "refuse EXTEND requests
  24557. to client connections" fix. Now directory authorities can
  24558. protect clients from the CVE-2011-2768 issue even if neither
  24559. the clients nor the relays have upgraded yet. There's a new
  24560. "GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays" config option
  24561. to let us transition smoothly, else tomorrow there would be no
  24562. guard relays.
  24563. o Privacy/anonymity fixes (bridge enumeration):
  24564. - Bridge relays now do their directory fetches inside Tor TLS
  24565. connections, like all the other clients do, rather than connecting
  24566. directly to the DirPort like public relays do. Removes another
  24567. avenue for enumerating bridges. Fixes bug 4115; bugfix on 0.2.0.35.
  24568. - Bridges relays now build circuits for themselves in a more similar
  24569. way to how clients build them. Removes another avenue for
  24570. enumerating bridges. Fixes bug 4124; bugfix on 0.2.0.3-alpha,
  24571. when bridges were introduced.
  24572. - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
  24573. that they initiated. Relays could distinguish incoming bridge
  24574. connections from client connections, creating another avenue for
  24575. enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
  24576. Found by "frosty_un".
  24577. o Major bugfixes:
  24578. - Fix a crash bug when changing node restrictions while a DNS lookup
  24579. is in-progress. Fixes bug 4259; bugfix on 0.2.2.25-alpha. Bugfix
  24580. by "Tey'".
  24581. - Don't launch a useless circuit after failing to use one of a
  24582. hidden service's introduction points. Previously, we would
  24583. launch a new introduction circuit, but not set the hidden service
  24584. which that circuit was intended to connect to, so it would never
  24585. actually be used. A different piece of code would then create a
  24586. new introduction circuit correctly. Bug reported by katmagic and
  24587. found by Sebastian Hahn. Bugfix on 0.2.1.13-alpha; fixes bug 4212.
  24588. o Minor bugfixes:
  24589. - Change an integer overflow check in the OpenBSD_Malloc code so
  24590. that GCC is less likely to eliminate it as impossible. Patch
  24591. from Mansour Moufid. Fixes bug 4059.
  24592. - When a hidden service turns an extra service-side introduction
  24593. circuit into a general-purpose circuit, free the rend_data and
  24594. intro_key fields first, so we won't leak memory if the circuit
  24595. is cannibalized for use as another service-side introduction
  24596. circuit. Bugfix on 0.2.1.7-alpha; fixes bug 4251.
  24597. - Bridges now skip DNS self-tests, to act a little more stealthily.
  24598. Fixes bug 4201; bugfix on 0.2.0.3-alpha, which first introduced
  24599. bridges. Patch by "warms0x".
  24600. - Fix internal bug-checking logic that was supposed to catch
  24601. failures in digest generation so that it will fail more robustly
  24602. if we ask for a nonexistent algorithm. Found by Coverity Scan.
  24603. Bugfix on 0.2.2.1-alpha; fixes Coverity CID 479.
  24604. - Report any failure in init_keys() calls launched because our
  24605. IP address has changed. Spotted by Coverity Scan. Bugfix on
  24606. 0.1.1.4-alpha; fixes CID 484.
  24607. o Minor bugfixes (log messages and documentation):
  24608. - Remove a confusing dollar sign from the example fingerprint in the
  24609. man page, and also make the example fingerprint a valid one. Fixes
  24610. bug 4309; bugfix on 0.2.1.3-alpha.
  24611. - The next version of Windows will be called Windows 8, and it has
  24612. a major version of 6, minor version of 2. Correctly identify that
  24613. version instead of calling it "Very recent version". Resolves
  24614. ticket 4153; reported by funkstar.
  24615. - Downgrade log messages about circuit timeout calibration from
  24616. "notice" to "info": they don't require or suggest any human
  24617. intervention. Patch from Tom Lowenthal. Fixes bug 4063;
  24618. bugfix on 0.2.2.14-alpha.
  24619. o Minor features:
  24620. - Turn on directory request statistics by default and include them in
  24621. extra-info descriptors. Don't break if we have no GeoIP database.
  24622. Backported from 0.2.3.1-alpha; implements ticket 3951.
  24623. - Update to the October 4 2011 Maxmind GeoLite Country database.
  24624. Changes in version 0.2.1.31 - 2011-10-26
  24625. Tor 0.2.1.31 backports important security and privacy fixes for
  24626. oldstable. This release is intended only for package maintainers and
  24627. others who cannot use the 0.2.2 stable series. All others should be
  24628. using Tor 0.2.2.x or newer.
  24629. o Security fixes (also included in 0.2.2.x):
  24630. - Replace all potentially sensitive memory comparison operations
  24631. with versions whose runtime does not depend on the data being
  24632. compared. This will help resist a class of attacks where an
  24633. adversary can use variations in timing information to learn
  24634. sensitive data. Fix for one case of bug 3122. (Safe memcmp
  24635. implementation by Robert Ransom based partially on code by DJB.)
  24636. - Fix an assert in parsing router descriptors containing IPv6
  24637. addresses. This one took down the directory authorities when
  24638. somebody tried some experimental code. Bugfix on 0.2.1.3-alpha.
  24639. o Privacy/anonymity fixes (also included in 0.2.2.x):
  24640. - Clients and bridges no longer send TLS certificate chains on
  24641. outgoing OR connections. Previously, each client or bridge would
  24642. use the same cert chain for all outgoing OR connections until
  24643. its IP address changes, which allowed any relay that the client
  24644. or bridge contacted to determine which entry guards it is using.
  24645. Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
  24646. - If a relay receives a CREATE_FAST cell on a TLS connection, it
  24647. no longer considers that connection as suitable for satisfying a
  24648. circuit EXTEND request. Now relays can protect clients from the
  24649. CVE-2011-2768 issue even if the clients haven't upgraded yet.
  24650. - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
  24651. that they initiated. Relays could distinguish incoming bridge
  24652. connections from client connections, creating another avenue for
  24653. enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
  24654. Found by "frosty_un".
  24655. - When receiving a hidden service descriptor, check that it is for
  24656. the hidden service we wanted. Previously, Tor would store any
  24657. hidden service descriptors that a directory gave it, whether it
  24658. wanted them or not. This wouldn't have let an attacker impersonate
  24659. a hidden service, but it did let directories pre-seed a client
  24660. with descriptors that it didn't want. Bugfix on 0.0.6.
  24661. - Avoid linkability based on cached hidden service descriptors: forget
  24662. all hidden service descriptors cached as a client when processing a
  24663. SIGNAL NEWNYM command. Fixes bug 3000; bugfix on 0.0.6.
  24664. - Make the bridge directory authority refuse to answer directory
  24665. requests for "all" descriptors. It used to include bridge
  24666. descriptors in its answer, which was a major information leak.
  24667. Found by "piebeer". Bugfix on 0.2.0.3-alpha.
  24668. - Don't attach new streams to old rendezvous circuits after SIGNAL
  24669. NEWNYM. Previously, we would keep using an existing rendezvous
  24670. circuit if it remained open (i.e. if it were kept open by a
  24671. long-lived stream, or if a new stream were attached to it before
  24672. Tor could notice that it was old and no longer in use). Bugfix on
  24673. 0.1.1.15-rc; fixes bug 3375.
  24674. o Minor bugfixes (also included in 0.2.2.x):
  24675. - When we restart our relay, we might get a successful connection
  24676. from the outside before we've started our reachability tests,
  24677. triggering a warning: "ORPort found reachable, but I have no
  24678. routerinfo yet. Failing to inform controller of success." This
  24679. bug was harmless unless Tor is running under a controller
  24680. like Vidalia, in which case the controller would never get a
  24681. REACHABILITY_SUCCEEDED status event. Bugfix on 0.1.2.6-alpha;
  24682. fixes bug 1172.
  24683. - Build correctly on OSX with zlib 1.2.4 and higher with all warnings
  24684. enabled. Fixes bug 1526.
  24685. - Remove undocumented option "-F" from tor-resolve: it hasn't done
  24686. anything since 0.2.1.16-rc.
  24687. - Avoid signed/unsigned comparisons by making SIZE_T_CEILING unsigned.
  24688. None of the cases where we did this before were wrong, but by making
  24689. this change we avoid warnings. Fixes bug 2475; bugfix on 0.2.1.28.
  24690. - Fix a rare crash bug that could occur when a client was configured
  24691. with a large number of bridges. Fixes bug 2629; bugfix on
  24692. 0.2.1.2-alpha. Bugfix by trac user "shitlei".
  24693. - Correct the warning displayed when a rendezvous descriptor exceeds
  24694. the maximum size. Fixes bug 2750; bugfix on 0.2.1.5-alpha. Found by
  24695. John Brooks.
  24696. - Fix an uncommon assertion failure when running with DNSPort under
  24697. heavy load. Fixes bug 2933; bugfix on 0.2.0.1-alpha.
  24698. - When warning about missing zlib development packages during compile,
  24699. give the correct package names. Bugfix on 0.2.0.1-alpha.
  24700. - Require that introduction point keys and onion keys have public
  24701. exponent 65537. Bugfix on 0.2.0.10-alpha.
  24702. - Do not crash when our configuration file becomes unreadable, for
  24703. example due to a permissions change, between when we start up
  24704. and when a controller calls SAVECONF. Fixes bug 3135; bugfix
  24705. on 0.0.9pre6.
  24706. - Fix warnings from GCC 4.6's "-Wunused-but-set-variable" option.
  24707. Fixes bug 3208.
  24708. - Always NUL-terminate the sun_path field of a sockaddr_un before
  24709. passing it to the kernel. (Not a security issue: kernels are
  24710. smart enough to reject bad sockaddr_uns.) Found by Coverity;
  24711. CID #428. Bugfix on Tor 0.2.0.3-alpha.
  24712. - Don't stack-allocate the list of supplementary GIDs when we're
  24713. about to log them. Stack-allocating NGROUPS_MAX gid_t elements
  24714. could take up to 256K, which is way too much stack. Found by
  24715. Coverity; CID #450. Bugfix on 0.2.1.7-alpha.
  24716. o Minor bugfixes (only in 0.2.1.x):
  24717. - Resume using micro-version numbers in 0.2.1.x: our Debian packages
  24718. rely on them. Bugfix on 0.2.1.30.
  24719. - Use git revisions instead of svn revisions when generating our
  24720. micro-version numbers. Bugfix on 0.2.1.15-rc; fixes bug 2402.
  24721. o Minor features (also included in 0.2.2.x):
  24722. - Adjust the expiration time on our SSL session certificates to
  24723. better match SSL certs seen in the wild. Resolves ticket 4014.
  24724. - Allow nameservers with IPv6 address. Resolves bug 2574.
  24725. - Update to the October 4 2011 Maxmind GeoLite Country database.
  24726. Changes in version 0.2.3.5-alpha - 2011-09-28
  24727. Tor 0.2.3.5-alpha fixes two bugs that make it possible to enumerate
  24728. bridge relays; fixes an assertion error that many users started hitting
  24729. today; and adds the ability to refill token buckets more often than
  24730. once per second, allowing significant performance improvements.
  24731. o Security fixes:
  24732. - Bridge relays now do their directory fetches inside Tor TLS
  24733. connections, like all the other clients do, rather than connecting
  24734. directly to the DirPort like public relays do. Removes another
  24735. avenue for enumerating bridges. Fixes bug 4115; bugfix on 0.2.0.35.
  24736. - Bridges relays now build circuits for themselves in a more similar
  24737. way to how clients build them. Removes another avenue for
  24738. enumerating bridges. Fixes bug 4124; bugfix on 0.2.0.3-alpha,
  24739. when bridges were introduced.
  24740. o Major bugfixes:
  24741. - Fix an "Assertion md->held_by_node == 1 failed" error that could
  24742. occur when the same microdescriptor was referenced by two node_t
  24743. objects at once. Fix for bug 4118; bugfix on Tor 0.2.3.1-alpha.
  24744. o Major features (networking):
  24745. - Add a new TokenBucketRefillInterval option to refill token buckets
  24746. more frequently than once per second. This should improve network
  24747. performance, alleviate queueing problems, and make traffic less
  24748. bursty. Implements proposal 183; closes ticket 3630. Design by
  24749. Florian Tschorsch and Björn Scheuermann; implementation by
  24750. Florian Tschorsch.
  24751. o Minor bugfixes:
  24752. - Change an integer overflow check in the OpenBSD_Malloc code so
  24753. that GCC is less likely to eliminate it as impossible. Patch
  24754. from Mansour Moufid. Fixes bug 4059.
  24755. o Minor bugfixes (usability):
  24756. - Downgrade log messages about circuit timeout calibration from
  24757. "notice" to "info": they don't require or suggest any human
  24758. intervention. Patch from Tom Lowenthal. Fixes bug 4063;
  24759. bugfix on 0.2.2.14-alpha.
  24760. o Minor features (diagnostics):
  24761. - When the system call to create a listener socket fails, log the
  24762. error message explaining why. This may help diagnose bug 4027.
  24763. Changes in version 0.2.3.4-alpha - 2011-09-13
  24764. Tor 0.2.3.4-alpha includes the fixes from 0.2.2.33, including a slight
  24765. tweak to Tor's TLS handshake that makes relays and bridges that run
  24766. this new version reachable from Iran again. It also fixes a few new
  24767. bugs in 0.2.3.x, and teaches relays to recognize when they're not
  24768. listed in the network consensus and republish.
  24769. o Major bugfixes (also part of 0.2.2.33):
  24770. - Avoid an assertion failure when reloading a configuration with
  24771. TrackExitHosts changes. Found and fixed by 'laruldan'. Fixes bug
  24772. 3923; bugfix on 0.2.2.25-alpha.
  24773. o Minor features (security, also part of 0.2.2.33):
  24774. - Check for replays of the public-key encrypted portion of an
  24775. INTRODUCE1 cell, in addition to the current check for replays of
  24776. the g^x value. This prevents a possible class of active attacks
  24777. by an attacker who controls both an introduction point and a
  24778. rendezvous point, and who uses the malleability of AES-CTR to
  24779. alter the encrypted g^x portion of the INTRODUCE1 cell. We think
  24780. that these attacks are infeasible (requiring the attacker to send
  24781. on the order of zettabytes of altered cells in a short interval),
  24782. but we'd rather block them off in case there are any classes of
  24783. this attack that we missed. Reported by Willem Pinckaers.
  24784. o Minor features (also part of 0.2.2.33):
  24785. - Adjust the expiration time on our SSL session certificates to
  24786. better match SSL certs seen in the wild. Resolves ticket 4014.
  24787. - Change the default required uptime for a relay to be accepted as
  24788. a HSDir (hidden service directory) from 24 hours to 25 hours.
  24789. Improves on 0.2.0.10-alpha; resolves ticket 2649.
  24790. - Add a VoteOnHidServDirectoriesV2 config option to allow directory
  24791. authorities to abstain from voting on assignment of the HSDir
  24792. consensus flag. Related to bug 2649.
  24793. - Update to the September 6 2011 Maxmind GeoLite Country database.
  24794. o Minor bugfixes (also part of 0.2.2.33):
  24795. - Demote the 'replay detected' log message emitted when a hidden
  24796. service receives the same Diffie-Hellman public key in two different
  24797. INTRODUCE2 cells to info level. A normal Tor client can cause that
  24798. log message during its normal operation. Bugfix on 0.2.1.6-alpha;
  24799. fixes part of bug 2442.
  24800. - Demote the 'INTRODUCE2 cell is too {old,new}' log message to info
  24801. level. There is nothing that a hidden service's operator can do
  24802. to fix its clients' clocks. Bugfix on 0.2.1.6-alpha; fixes part
  24803. of bug 2442.
  24804. - Clarify a log message specifying the characters permitted in
  24805. HiddenServiceAuthorizeClient client names. Previously, the log
  24806. message said that "[A-Za-z0-9+-_]" were permitted; that could have
  24807. given the impression that every ASCII character between "+" and "_"
  24808. was permitted. Now we say "[A-Za-z0-9+_-]". Bugfix on 0.2.1.5-alpha.
  24809. o Build fixes (also part of 0.2.2.33):
  24810. - Clean up some code issues that prevented Tor from building on older
  24811. BSDs. Fixes bug 3894; reported by "grarpamp".
  24812. - Search for a platform-specific version of "ar" when cross-compiling.
  24813. Should fix builds on iOS. Resolves bug 3909, found by Marco Bonetti.
  24814. o Major bugfixes:
  24815. - Fix a bug where the SocksPort option (for example) would get
  24816. ignored and replaced by the default if a SocksListenAddress
  24817. option was set. Bugfix on 0.2.3.3-alpha; fixes bug 3936. Fix by
  24818. Fabian Keil.
  24819. o Major features:
  24820. - Relays now try regenerating and uploading their descriptor more
  24821. frequently if they are not listed in the consensus, or if the
  24822. version of their descriptor listed in the consensus is too
  24823. old. This fix should prevent situations where a server declines
  24824. to re-publish itself because it has done so too recently, even
  24825. though the authorities decided not to list its recent-enough
  24826. descriptor. Fix for bug 3327.
  24827. o Minor features:
  24828. - Relays now include a reason for regenerating their descriptors
  24829. in an HTTP header when uploading to the authorities. This will
  24830. make it easier to debug descriptor-upload issues in the future.
  24831. - When starting as root and then changing our UID via the User
  24832. control option, and we have a ControlSocket configured, make sure
  24833. that the ControlSocket is owned by the same account that Tor will
  24834. run under. Implements ticket 3421; fix by Jérémy Bobbio.
  24835. o Minor bugfixes:
  24836. - Abort if tor_vasprintf fails in connection_printf_to_buf (a
  24837. utility function used in the control-port code). This shouldn't
  24838. ever happen unless Tor is completely out of memory, but if it did
  24839. happen and Tor somehow recovered from it, Tor could have sent a log
  24840. message to a control port in the middle of a reply to a controller
  24841. command. Fixes part of bug 3428; bugfix on 0.1.2.3-alpha.
  24842. - Make 'FetchUselessDescriptors' cause all descriptor types and
  24843. all consensus types (including microdescriptors) to get fetched.
  24844. Fixes bug 3851; bugfix on 0.2.3.1-alpha.
  24845. o Code refactoring:
  24846. - Make a new "entry connection" struct as an internal subtype of "edge
  24847. connection", to simplify the code and make exit connections smaller.
  24848. Changes in version 0.2.2.33 - 2011-09-13
  24849. Tor 0.2.2.33 fixes several bugs, and includes a slight tweak to Tor's
  24850. TLS handshake that makes relays and bridges that run this new version
  24851. reachable from Iran again.
  24852. o Major bugfixes:
  24853. - Avoid an assertion failure when reloading a configuration with
  24854. TrackExitHosts changes. Found and fixed by 'laruldan'. Fixes bug
  24855. 3923; bugfix on 0.2.2.25-alpha.
  24856. o Minor features (security):
  24857. - Check for replays of the public-key encrypted portion of an
  24858. INTRODUCE1 cell, in addition to the current check for replays of
  24859. the g^x value. This prevents a possible class of active attacks
  24860. by an attacker who controls both an introduction point and a
  24861. rendezvous point, and who uses the malleability of AES-CTR to
  24862. alter the encrypted g^x portion of the INTRODUCE1 cell. We think
  24863. that these attacks are infeasible (requiring the attacker to send
  24864. on the order of zettabytes of altered cells in a short interval),
  24865. but we'd rather block them off in case there are any classes of
  24866. this attack that we missed. Reported by Willem Pinckaers.
  24867. o Minor features:
  24868. - Adjust the expiration time on our SSL session certificates to
  24869. better match SSL certs seen in the wild. Resolves ticket 4014.
  24870. - Change the default required uptime for a relay to be accepted as
  24871. a HSDir (hidden service directory) from 24 hours to 25 hours.
  24872. Improves on 0.2.0.10-alpha; resolves ticket 2649.
  24873. - Add a VoteOnHidServDirectoriesV2 config option to allow directory
  24874. authorities to abstain from voting on assignment of the HSDir
  24875. consensus flag. Related to bug 2649.
  24876. - Update to the September 6 2011 Maxmind GeoLite Country database.
  24877. o Minor bugfixes (documentation and log messages):
  24878. - Correct the man page to explain that HashedControlPassword and
  24879. CookieAuthentication can both be set, in which case either method
  24880. is sufficient to authenticate to Tor. Bugfix on 0.2.0.7-alpha,
  24881. when we decided to allow these config options to both be set. Issue
  24882. raised by bug 3898.
  24883. - Demote the 'replay detected' log message emitted when a hidden
  24884. service receives the same Diffie-Hellman public key in two different
  24885. INTRODUCE2 cells to info level. A normal Tor client can cause that
  24886. log message during its normal operation. Bugfix on 0.2.1.6-alpha;
  24887. fixes part of bug 2442.
  24888. - Demote the 'INTRODUCE2 cell is too {old,new}' log message to info
  24889. level. There is nothing that a hidden service's operator can do
  24890. to fix its clients' clocks. Bugfix on 0.2.1.6-alpha; fixes part
  24891. of bug 2442.
  24892. - Clarify a log message specifying the characters permitted in
  24893. HiddenServiceAuthorizeClient client names. Previously, the log
  24894. message said that "[A-Za-z0-9+-_]" were permitted; that could have
  24895. given the impression that every ASCII character between "+" and "_"
  24896. was permitted. Now we say "[A-Za-z0-9+_-]". Bugfix on 0.2.1.5-alpha.
  24897. o Build fixes:
  24898. - Provide a substitute implementation of lround() for MSVC, which
  24899. apparently lacks it. Patch from Gisle Vanem.
  24900. - Clean up some code issues that prevented Tor from building on older
  24901. BSDs. Fixes bug 3894; reported by "grarpamp".
  24902. - Search for a platform-specific version of "ar" when cross-compiling.
  24903. Should fix builds on iOS. Resolves bug 3909, found by Marco Bonetti.
  24904. Changes in version 0.2.3.3-alpha - 2011-09-01
  24905. Tor 0.2.3.3-alpha adds a new "stream isolation" feature to improve Tor's
  24906. security, and provides client-side support for the microdescriptor
  24907. and optimistic data features introduced earlier in the 0.2.3.x
  24908. series. It also includes numerous critical bugfixes in the (optional)
  24909. bufferevent-based networking backend.
  24910. o Major features (stream isolation):
  24911. - You can now configure Tor so that streams from different
  24912. applications are isolated on different circuits, to prevent an
  24913. attacker who sees your streams as they leave an exit node from
  24914. linking your sessions to one another. To do this, choose some way
  24915. to distinguish the applications: have them connect to different
  24916. SocksPorts, or have one of them use SOCKS4 while the other uses
  24917. SOCKS5, or have them pass different authentication strings to the
  24918. SOCKS proxy. Then, use the new SocksPort syntax to configure the
  24919. degree of isolation you need. This implements Proposal 171.
  24920. - There's a new syntax for specifying multiple client ports (such as
  24921. SOCKSPort, TransPort, DNSPort, NATDPort): you can now just declare
  24922. multiple *Port entries with full addr:port syntax on each.
  24923. The old *ListenAddress format is still supported, but you can't
  24924. mix it with the new *Port syntax.
  24925. o Major features (other):
  24926. - Enable microdescriptor fetching by default for clients. This allows
  24927. clients to download a much smaller amount of directory information.
  24928. To disable it (and go back to the old-style consensus and
  24929. descriptors), set "UseMicrodescriptors 0" in your torrc file.
  24930. - Tor's firewall-helper feature, introduced in 0.2.3.1-alpha (see the
  24931. "PortForwarding" config option), now supports Windows.
  24932. - When using an exit relay running 0.2.3.x, clients can now
  24933. "optimistically" send data before the exit relay reports that
  24934. the stream has opened. This saves a round trip when starting
  24935. connections where the client speaks first (such as web browsing).
  24936. This behavior is controlled by a consensus parameter (currently
  24937. disabled). To turn it on or off manually, use the "OptimisticData"
  24938. torrc option. Implements proposal 181; code by Ian Goldberg.
  24939. o Major bugfixes (bufferevents, fixes on 0.2.3.1-alpha):
  24940. - When using IOCP on Windows, we need to enable Libevent windows
  24941. threading support.
  24942. - The IOCP backend now works even when the user has not specified
  24943. the (internal, debugging-only) _UseFilteringSSLBufferevents option.
  24944. Fixes part of bug 3752.
  24945. - Correctly record the bytes we've read and written when using
  24946. bufferevents, so that we can include them in our bandwidth history
  24947. and advertised bandwidth. Fixes bug 3803.
  24948. - Apply rate-limiting only at the bottom of a chain of filtering
  24949. bufferevents. This prevents us from filling up internal read
  24950. buffers and violating rate-limits when filtering bufferevents
  24951. are enabled. Fixes part of bug 3804.
  24952. - Add high-watermarks to the output buffers for filtered
  24953. bufferevents. This prevents us from filling up internal write
  24954. buffers and wasting CPU cycles when filtering bufferevents are
  24955. enabled. Fixes part of bug 3804.
  24956. - Correctly notice when data has been written from a bufferevent
  24957. without flushing it completely. Fixes bug 3805.
  24958. - Fix a bug where server-side tunneled bufferevent-based directory
  24959. streams would get closed prematurely. Fixes bug 3814.
  24960. - Fix a use-after-free error with per-connection rate-limiting
  24961. buckets. Fixes bug 3888.
  24962. o Major bugfixes (also part of 0.2.2.31-rc):
  24963. - If we're configured to write our ControlPorts to disk, only write
  24964. them after switching UID and creating the data directory. This way,
  24965. we don't fail when starting up with a nonexistent DataDirectory
  24966. and a ControlPortWriteToFile setting based on that directory. Fixes
  24967. bug 3747; bugfix on Tor 0.2.2.26-beta.
  24968. o Minor features:
  24969. - Added a new CONF_CHANGED event so that controllers can be notified
  24970. of any configuration changes made by other controllers, or by the
  24971. user. Implements ticket 1692.
  24972. - Use evbuffer_copyout() in inspect_evbuffer(). This fixes a memory
  24973. leak when using bufferevents, and lets Libevent worry about how to
  24974. best copy data out of a buffer.
  24975. - Replace files in stats/ rather than appending to them. Now that we
  24976. include statistics in extra-info descriptors, it makes no sense to
  24977. keep old statistics forever. Implements ticket 2930.
  24978. o Minor features (build compatibility):
  24979. - Limited, experimental support for building with nmake and MSVC.
  24980. - Provide a substitute implementation of lround() for MSVC, which
  24981. apparently lacks it. Patch from Gisle Vanem.
  24982. o Minor features (also part of 0.2.2.31-rc):
  24983. - Update to the August 2 2011 Maxmind GeoLite Country database.
  24984. o Minor bugfixes (on 0.2.3.x-alpha):
  24985. - Fix a spurious warning when parsing SOCKS requests with
  24986. bufferevents enabled. Fixes bug 3615; bugfix on 0.2.3.2-alpha.
  24987. - Get rid of a harmless warning that could happen on relays running
  24988. with bufferevents. The warning was caused by someone doing an http
  24989. request to a relay's orport. Also don't warn for a few related
  24990. non-errors. Fixes bug 3700; bugfix on 0.2.3.1-alpha.
  24991. o Minor bugfixes (on 2.2.x and earlier):
  24992. - Correct the man page to explain that HashedControlPassword and
  24993. CookieAuthentication can both be set, in which case either method
  24994. is sufficient to authenticate to Tor. Bugfix on 0.2.0.7-alpha,
  24995. when we decided to allow these config options to both be set. Issue
  24996. raised by bug 3898.
  24997. - The "--quiet" and "--hush" options now apply not only to Tor's
  24998. behavior before logs are configured, but also to Tor's behavior in
  24999. the absence of configured logs. Fixes bug 3550; bugfix on
  25000. 0.2.0.10-alpha.
  25001. o Minor bugfixes (also part of 0.2.2.31-rc):
  25002. - Write several files in text mode, on OSes that distinguish text
  25003. mode from binary mode (namely, Windows). These files are:
  25004. 'buffer-stats', 'dirreq-stats', and 'entry-stats' on relays
  25005. that collect those statistics; 'client_keys' and 'hostname' for
  25006. hidden services that use authentication; and (in the tor-gencert
  25007. utility) newly generated identity and signing keys. Previously,
  25008. we wouldn't specify text mode or binary mode, leading to an
  25009. assertion failure. Fixes bug 3607. Bugfix on 0.2.1.1-alpha (when
  25010. the DirRecordUsageByCountry option which would have triggered
  25011. the assertion failure was added), although this assertion failure
  25012. would have occurred in tor-gencert on Windows in 0.2.0.1-alpha.
  25013. - Selectively disable deprecation warnings on OS X because Lion
  25014. started deprecating the shipped copy of openssl. Fixes bug 3643.
  25015. - Remove an extra pair of quotation marks around the error
  25016. message in control-port STATUS_GENERAL BUG events. Bugfix on
  25017. 0.1.2.6-alpha; fixes bug 3732.
  25018. - When unable to format an address as a string, report its value
  25019. as "???" rather than reusing the last formatted address. Bugfix
  25020. on 0.2.1.5-alpha.
  25021. o Code simplifications and refactoring:
  25022. - Rewrite the listener-selection logic so that parsing which ports
  25023. we want to listen on is now separate from binding to the ports
  25024. we want.
  25025. o Build changes:
  25026. - Building Tor with bufferevent support now requires Libevent
  25027. 2.0.13-stable or later. Previous versions of Libevent had bugs in
  25028. SSL-related bufferevents and related issues that would make Tor
  25029. work badly with bufferevents. Requiring 2.0.13-stable also allows
  25030. Tor with bufferevents to take advantage of Libevent APIs
  25031. introduced after 2.0.8-rc.
  25032. Changes in version 0.2.2.32 - 2011-08-27
  25033. The Tor 0.2.2 release series is dedicated to the memory of Andreas
  25034. Pfitzmann (1958-2010), a pioneer in anonymity and privacy research,
  25035. a founder of the PETS community, a leader in our field, a mentor,
  25036. and a friend. He left us with these words: "I had the possibility
  25037. to contribute to this world that is not as it should be. I hope I
  25038. could help in some areas to make the world a better place, and that
  25039. I could also encourage other people to be engaged in improving the
  25040. world. Please, stay engaged. This world needs you, your love, your
  25041. initiative -- now I cannot be part of that anymore."
  25042. Tor 0.2.2.32, the first stable release in the 0.2.2 branch, is finally
  25043. ready. More than two years in the making, this release features improved
  25044. client performance and hidden service reliability, better compatibility
  25045. for Android, correct behavior for bridges that listen on more than
  25046. one address, more extensible and flexible directory object handling,
  25047. better reporting of network statistics, improved code security, and
  25048. many many other features and bugfixes.
  25049. Changes in version 0.2.2.31-rc - 2011-08-17
  25050. Tor 0.2.2.31-rc is the second and hopefully final release candidate
  25051. for the Tor 0.2.2.x series.
  25052. o Major bugfixes:
  25053. - Remove an extra pair of quotation marks around the error
  25054. message in control-port STATUS_GENERAL BUG events. Bugfix on
  25055. 0.1.2.6-alpha; fixes bug 3732.
  25056. - If we're configured to write our ControlPorts to disk, only write
  25057. them after switching UID and creating the data directory. This way,
  25058. we don't fail when starting up with a nonexistent DataDirectory
  25059. and a ControlPortWriteToFile setting based on that directory. Fixes
  25060. bug 3747; bugfix on Tor 0.2.2.26-beta.
  25061. o Minor features:
  25062. - Update to the August 2 2011 Maxmind GeoLite Country database.
  25063. o Minor bugfixes:
  25064. - Allow GETINFO fingerprint to return a fingerprint even when
  25065. we have not yet built a router descriptor. Fixes bug 3577;
  25066. bugfix on 0.2.0.1-alpha.
  25067. - Write several files in text mode, on OSes that distinguish text
  25068. mode from binary mode (namely, Windows). These files are:
  25069. 'buffer-stats', 'dirreq-stats', and 'entry-stats' on relays
  25070. that collect those statistics; 'client_keys' and 'hostname' for
  25071. hidden services that use authentication; and (in the tor-gencert
  25072. utility) newly generated identity and signing keys. Previously,
  25073. we wouldn't specify text mode or binary mode, leading to an
  25074. assertion failure. Fixes bug 3607. Bugfix on 0.2.1.1-alpha (when
  25075. the DirRecordUsageByCountry option which would have triggered
  25076. the assertion failure was added), although this assertion failure
  25077. would have occurred in tor-gencert on Windows in 0.2.0.1-alpha.
  25078. - Selectively disable deprecation warnings on OS X because Lion
  25079. started deprecating the shipped copy of openssl. Fixes bug 3643.
  25080. - When unable to format an address as a string, report its value
  25081. as "???" rather than reusing the last formatted address. Bugfix
  25082. on 0.2.1.5-alpha.
  25083. Changes in version 0.2.3.2-alpha - 2011-07-18
  25084. Tor 0.2.3.2-alpha introduces two new experimental features:
  25085. microdescriptors and pluggable transports. It also continues cleaning
  25086. up a variety of recently introduced features.
  25087. o Major features:
  25088. - Clients can now use microdescriptors instead of regular descriptors
  25089. to build circuits. Microdescriptors are authority-generated
  25090. summaries of regular descriptors' contents, designed to change
  25091. very rarely (see proposal 158 for details). This feature is
  25092. designed to save bandwidth, especially for clients on slow internet
  25093. connections. It's off by default for now, since nearly no caches
  25094. support it, but it will be on-by-default for clients in a future
  25095. version. You can use the UseMicrodescriptors option to turn it on.
  25096. - Tor clients using bridges can now be configured to use a separate
  25097. 'transport' proxy for each bridge. This approach helps to resist
  25098. censorship by allowing bridges to use protocol obfuscation
  25099. plugins. It implements part of proposal 180. Implements ticket 2841.
  25100. - While we're trying to bootstrap, record how many TLS connections
  25101. fail in each state, and report which states saw the most failures
  25102. in response to any bootstrap failures. This feature may speed up
  25103. diagnosis of censorship events. Implements ticket 3116.
  25104. o Major bugfixes (on 0.2.3.1-alpha):
  25105. - When configuring a large set of nodes in EntryNodes (as with
  25106. 'EntryNodes {cc}' or 'EntryNodes 1.1.1.1/16'), choose only a
  25107. random subset to be guards, and choose them in random
  25108. order. Fixes bug 2798.
  25109. - Tor could crash when remembering a consensus in a non-used consensus
  25110. flavor without having a current consensus set. Fixes bug 3361.
  25111. - Comparing an unknown address to a microdescriptor's shortened exit
  25112. policy would always give a "rejected" result. Fixes bug 3599.
  25113. - Using microdescriptors as a client no longer prevents Tor from
  25114. uploading and downloading hidden service descriptors. Fixes
  25115. bug 3601.
  25116. o Minor features:
  25117. - Allow nameservers with IPv6 address. Resolves bug 2574.
  25118. - Accept attempts to include a password authenticator in the
  25119. handshake, as supported by SOCKS5. This handles SOCKS clients that
  25120. don't know how to omit a password when authenticating. Resolves
  25121. bug 1666.
  25122. - When configuring a large set of nodes in EntryNodes, and there are
  25123. enough of them listed as Guard so that we don't need to consider
  25124. the non-guard entries, prefer the ones listed with the Guard flag.
  25125. - Check for and recover from inconsistency in the microdescriptor
  25126. cache. This will make it harder for us to accidentally free a
  25127. microdescriptor without removing it from the appropriate data
  25128. structures. Fixes issue 3135; issue noted by "wanoskarnet".
  25129. - Log SSL state transitions at log level DEBUG, log domain
  25130. HANDSHAKE. This can be useful for debugging censorship events.
  25131. Implements ticket 3264.
  25132. - Add port 6523 (Gobby) to LongLivedPorts. Patch by intrigeri;
  25133. implements ticket 3439.
  25134. o Minor bugfixes (on 0.2.3.1-alpha):
  25135. - Do not free all general-purpose regular descriptors just
  25136. because microdescriptor use is enabled. Fixes bug 3113.
  25137. - Correctly link libevent_openssl when --enable-static-libevent
  25138. is passed to configure. Fixes bug 3118.
  25139. - Bridges should not complain during their heartbeat log messages that
  25140. they are unlisted in the consensus: that's more or less the point
  25141. of being a bridge. Fixes bug 3183.
  25142. - Report a SIGNAL event to controllers when acting on a delayed
  25143. SIGNAL NEWNYM command. Previously, we would report a SIGNAL
  25144. event to the controller if we acted on a SIGNAL NEWNYM command
  25145. immediately, and otherwise not report a SIGNAL event for the
  25146. command at all. Fixes bug 3349.
  25147. - Fix a crash when handling the SIGNAL controller command or
  25148. reporting ERR-level status events with bufferevents enabled. Found
  25149. by Robert Ransom. Fixes bug 3367.
  25150. - Always ship the tor-fw-helper manpage in our release tarballs.
  25151. Fixes bug 3389. Reported by Stephen Walker.
  25152. - Fix a class of double-mark-for-close bugs when bufferevents
  25153. are enabled. Fixes bug 3403.
  25154. - Update tor-fw-helper to support libnatpmp-20110618. Fixes bug 3434.
  25155. - Add SIGNAL to the list returned by the 'GETINFO events/names'
  25156. control-port command. Fixes part of bug 3465.
  25157. - Prevent using negative indices during unit test runs when read_all()
  25158. fails. Spotted by coverity.
  25159. - Fix a rare memory leak when checking the nodelist without it being
  25160. present. Found by coverity.
  25161. - Only try to download a microdescriptor-flavored consensus from
  25162. a directory cache that provides them.
  25163. o Minor bugfixes (on 0.2.2.x and earlier):
  25164. - Assert that hidden-service-related operations are not performed
  25165. using single-hop circuits. Previously, Tor would assert that
  25166. client-side streams are not attached to single-hop circuits,
  25167. but not that other sensitive operations on the client and service
  25168. side are not performed using single-hop circuits. Fixes bug 3332;
  25169. bugfix on 0.0.6.
  25170. - Don't publish a new relay descriptor when we reload our onion key,
  25171. unless the onion key has actually changed. Fixes bug 3263 and
  25172. resolves another cause of bug 1810. Bugfix on 0.1.1.11-alpha.
  25173. - Allow GETINFO fingerprint to return a fingerprint even when
  25174. we have not yet built a router descriptor. Fixes bug 3577;
  25175. bugfix on 0.2.0.1-alpha.
  25176. - Make 'tor --digests' list hashes of all Tor source files. Bugfix
  25177. on 0.2.2.4-alpha; fixes bug 3427.
  25178. o Code simplification and refactoring:
  25179. - Use tor_sscanf() in place of scanf() in more places through the
  25180. code. This makes us a little more locale-independent, and
  25181. should help shut up code-analysis tools that can't tell
  25182. a safe sscanf string from a dangerous one.
  25183. - Use tt_assert(), not tor_assert(), for checking for test failures.
  25184. This makes the unit tests more able to go on in the event that
  25185. one of them fails.
  25186. - Split connection_about_to_close() into separate functions for each
  25187. connection type.
  25188. o Build changes:
  25189. - On Windows, we now define the _WIN32_WINNT macros only if they
  25190. are not already defined. This lets the person building Tor decide,
  25191. if they want, to require a later version of Windows.
  25192. Changes in version 0.2.2.30-rc - 2011-07-07
  25193. Tor 0.2.2.30-rc is the first release candidate for the Tor 0.2.2.x
  25194. series. It fixes a few smaller bugs, but generally appears stable.
  25195. Please test it and let us know whether it is!
  25196. o Minor bugfixes:
  25197. - Send a SUCCEEDED stream event to the controller when a reverse
  25198. resolve succeeded. Fixes bug 3536; bugfix on 0.0.8pre1. Issue
  25199. discovered by katmagic.
  25200. - Always NUL-terminate the sun_path field of a sockaddr_un before
  25201. passing it to the kernel. (Not a security issue: kernels are
  25202. smart enough to reject bad sockaddr_uns.) Found by Coverity;
  25203. CID #428. Bugfix on Tor 0.2.0.3-alpha.
  25204. - Don't stack-allocate the list of supplementary GIDs when we're
  25205. about to log them. Stack-allocating NGROUPS_MAX gid_t elements
  25206. could take up to 256K, which is way too much stack. Found by
  25207. Coverity; CID #450. Bugfix on 0.2.1.7-alpha.
  25208. - Add BUILDTIMEOUT_SET to the list returned by the 'GETINFO
  25209. events/names' control-port command. Bugfix on 0.2.2.9-alpha;
  25210. fixes part of bug 3465.
  25211. - Fix a memory leak when receiving a descriptor for a hidden
  25212. service we didn't ask for. Found by Coverity; CID #30. Bugfix
  25213. on 0.2.2.26-beta.
  25214. o Minor features:
  25215. - Update to the July 1 2011 Maxmind GeoLite Country database.
  25216. Changes in version 0.2.2.29-beta - 2011-06-20
  25217. Tor 0.2.2.29-beta reverts an accidental behavior change for users who
  25218. have bridge lines in their torrc but don't want to use them; gets
  25219. us closer to having the control socket feature working on Debian;
  25220. and fixes a variety of smaller bugs.
  25221. o Major bugfixes:
  25222. - Revert the UseBridges option to its behavior before 0.2.2.28-beta.
  25223. When we changed the default behavior to "use bridges if any
  25224. are listed in the torrc", we surprised users who had bridges
  25225. in their torrc files but who didn't actually want to use them.
  25226. Partial resolution for bug 3354.
  25227. o Privacy fixes:
  25228. - Don't attach new streams to old rendezvous circuits after SIGNAL
  25229. NEWNYM. Previously, we would keep using an existing rendezvous
  25230. circuit if it remained open (i.e. if it were kept open by a
  25231. long-lived stream, or if a new stream were attached to it before
  25232. Tor could notice that it was old and no longer in use). Bugfix on
  25233. 0.1.1.15-rc; fixes bug 3375.
  25234. o Minor bugfixes:
  25235. - Fix a bug when using ControlSocketsGroupWritable with User. The
  25236. directory's group would be checked against the current group, not
  25237. the configured group. Patch by Jérémy Bobbio. Fixes bug 3393;
  25238. bugfix on 0.2.2.26-beta.
  25239. - Make connection_printf_to_buf()'s behavior sane. Its callers
  25240. expect it to emit a CRLF iff the format string ends with CRLF;
  25241. it actually emitted a CRLF iff (a) the format string ended with
  25242. CRLF or (b) the resulting string was over 1023 characters long or
  25243. (c) the format string did not end with CRLF *and* the resulting
  25244. string was 1021 characters long or longer. Bugfix on 0.1.1.9-alpha;
  25245. fixes part of bug 3407.
  25246. - Make send_control_event_impl()'s behavior sane. Its callers
  25247. expect it to always emit a CRLF at the end of the string; it
  25248. might have emitted extra control characters as well. Bugfix on
  25249. 0.1.1.9-alpha; fixes another part of bug 3407.
  25250. - Make crypto_rand_int() check the value of its input correctly.
  25251. Previously, it accepted values up to UINT_MAX, but could return a
  25252. negative number if given a value above INT_MAX+1. Found by George
  25253. Kadianakis. Fixes bug 3306; bugfix on 0.2.2pre14.
  25254. - Avoid a segfault when reading a malformed circuit build state
  25255. with more than INT_MAX entries. Found by wanoskarnet. Bugfix on
  25256. 0.2.2.4-alpha.
  25257. - When asked about a DNS record type we don't support via a
  25258. client DNSPort, reply with NOTIMPL rather than an empty
  25259. reply. Patch by intrigeri. Fixes bug 3369; bugfix on 2.0.1-alpha.
  25260. - Fix a rare memory leak during stats writing. Found by coverity.
  25261. o Minor features:
  25262. - Update to the June 1 2011 Maxmind GeoLite Country database.
  25263. o Code simplifications and refactoring:
  25264. - Remove some dead code as indicated by coverity.
  25265. - Remove a few dead assignments during router parsing. Found by
  25266. coverity.
  25267. - Add some forgotten return value checks during unit tests. Found
  25268. by coverity.
  25269. - Don't use 1-bit wide signed bit fields. Found by coverity.
  25270. Changes in version 0.2.2.28-beta - 2011-06-04
  25271. Tor 0.2.2.28-beta makes great progress towards a new stable release: we
  25272. fixed a big bug in whether relays stay in the consensus consistently,
  25273. we moved closer to handling bridges and hidden services correctly,
  25274. and we started the process of better handling the dreaded "my Vidalia
  25275. died, and now my Tor demands a password when I try to reconnect to it"
  25276. usability issue.
  25277. o Major bugfixes:
  25278. - Don't decide to make a new descriptor when receiving a HUP signal.
  25279. This bug has caused a lot of 0.2.2.x relays to disappear from the
  25280. consensus periodically. Fixes the most common case of triggering
  25281. bug 1810; bugfix on 0.2.2.7-alpha.
  25282. - Actually allow nameservers with IPv6 addresses. Fixes bug 2574.
  25283. - Don't try to build descriptors if "ORPort auto" is set and we
  25284. don't know our actual ORPort yet. Fix for bug 3216; bugfix on
  25285. 0.2.2.26-beta.
  25286. - Resolve a crash that occurred when setting BridgeRelay to 1 with
  25287. accounting enabled. Fixes bug 3228; bugfix on 0.2.2.18-alpha.
  25288. - Apply circuit timeouts to opened hidden-service-related circuits
  25289. based on the correct start time. Previously, we would apply the
  25290. circuit build timeout based on time since the circuit's creation;
  25291. it was supposed to be applied based on time since the circuit
  25292. entered its current state. Bugfix on 0.0.6; fixes part of bug 1297.
  25293. - Use the same circuit timeout for client-side introduction
  25294. circuits as for other four-hop circuits, rather than the timeout
  25295. for single-hop directory-fetch circuits; the shorter timeout may
  25296. have been appropriate with the static circuit build timeout in
  25297. 0.2.1.x and earlier, but caused many hidden service access attempts
  25298. to fail with the adaptive CBT introduced in 0.2.2.2-alpha. Bugfix
  25299. on 0.2.2.2-alpha; fixes another part of bug 1297.
  25300. - In ticket 2511 we fixed a case where you could use an unconfigured
  25301. bridge if you had configured it as a bridge the last time you ran
  25302. Tor. Now fix another edge case: if you had configured it as a bridge
  25303. but then switched to a different bridge via the controller, you
  25304. would still be willing to use the old one. Bugfix on 0.2.0.1-alpha;
  25305. fixes bug 3321.
  25306. o Major features:
  25307. - Add an __OwningControllerProcess configuration option and a
  25308. TAKEOWNERSHIP control-port command. Now a Tor controller can ensure
  25309. that when it exits, Tor will shut down. Implements feature 3049.
  25310. - If "UseBridges 1" is set and no bridges are configured, Tor will
  25311. now refuse to build any circuits until some bridges are set.
  25312. If "UseBridges auto" is set, Tor will use bridges if they are
  25313. configured and we are not running as a server, but otherwise will
  25314. make circuits as usual. The new default is "auto". Patch by anonym,
  25315. so the Tails LiveCD can stop automatically revealing you as a Tor
  25316. user on startup.
  25317. o Minor bugfixes:
  25318. - Fix warnings from GCC 4.6's "-Wunused-but-set-variable" option.
  25319. - Remove a trailing asterisk from "exit-policy/default" in the
  25320. output of the control port command "GETINFO info/names". Bugfix
  25321. on 0.1.2.5-alpha.
  25322. - Use a wide type to hold sockets when built for 64-bit Windows builds.
  25323. Fixes bug 3270.
  25324. - Warn when the user configures two HiddenServiceDir lines that point
  25325. to the same directory. Bugfix on 0.0.6 (the version introducing
  25326. HiddenServiceDir); fixes bug 3289.
  25327. - Remove dead code from rend_cache_lookup_v2_desc_as_dir. Fixes
  25328. part of bug 2748; bugfix on 0.2.0.10-alpha.
  25329. - Log malformed requests for rendezvous descriptors as protocol
  25330. warnings, not warnings. Also, use a more informative log message
  25331. in case someone sees it at log level warning without prior
  25332. info-level messages. Fixes the other part of bug 2748; bugfix
  25333. on 0.2.0.10-alpha.
  25334. - Clear the table recording the time of the last request for each
  25335. hidden service descriptor from each HS directory on SIGNAL NEWNYM.
  25336. Previously, we would clear our HS descriptor cache on SIGNAL
  25337. NEWNYM, but if we had previously retrieved a descriptor (or tried
  25338. to) from every directory responsible for it, we would refuse to
  25339. fetch it again for up to 15 minutes. Bugfix on 0.2.2.25-alpha;
  25340. fixes bug 3309.
  25341. - Fix a log message that said "bits" while displaying a value in
  25342. bytes. Found by wanoskarnet. Fixes bug 3318; bugfix on
  25343. 0.2.0.1-alpha.
  25344. - When checking for 1024-bit keys, check for 1024 bits, not 128
  25345. bytes. This allows Tor to correctly discard keys of length 1017
  25346. through 1023. Bugfix on 0.0.9pre5.
  25347. o Minor features:
  25348. - Relays now log the reason for publishing a new relay descriptor,
  25349. so we have a better chance of hunting down instances of bug 1810.
  25350. Resolves ticket 3252.
  25351. - Revise most log messages that refer to nodes by nickname to
  25352. instead use the "$key=nickname at address" format. This should be
  25353. more useful, especially since nicknames are less and less likely
  25354. to be unique. Resolves ticket 3045.
  25355. - Log (at info level) when purging pieces of hidden-service-client
  25356. state because of SIGNAL NEWNYM.
  25357. o Removed options:
  25358. - Remove undocumented option "-F" from tor-resolve: it hasn't done
  25359. anything since 0.2.1.16-rc.
  25360. Changes in version 0.2.2.27-beta - 2011-05-18
  25361. Tor 0.2.2.27-beta fixes a bridge-related stability bug in the previous
  25362. release, and also adds a few more general bugfixes.
  25363. o Major bugfixes:
  25364. - Fix a crash bug when changing bridges in a running Tor process.
  25365. Fixes bug 3213; bugfix on 0.2.2.26-beta.
  25366. - When the controller configures a new bridge, don't wait 10 to 60
  25367. seconds before trying to fetch its descriptor. Bugfix on
  25368. 0.2.0.3-alpha; fixes bug 3198 (suggested by 2355).
  25369. o Minor bugfixes:
  25370. - Require that onion keys have exponent 65537 in microdescriptors too.
  25371. Fixes more of bug 3207; bugfix on 0.2.2.26-beta.
  25372. - Tor used to limit HttpProxyAuthenticator values to 48 characters.
  25373. Changed the limit to 512 characters by removing base64 newlines.
  25374. Fixes bug 2752. Fix by Michael Yakubovich.
  25375. - When a client starts or stops using bridges, never use a circuit
  25376. that was built before the configuration change. This behavior could
  25377. put at risk a user who uses bridges to ensure that her traffic
  25378. only goes to the chosen addresses. Bugfix on 0.2.0.3-alpha; fixes
  25379. bug 3200.
  25380. Changes in version 0.2.2.26-beta - 2011-05-17
  25381. Tor 0.2.2.26-beta fixes a variety of potential privacy problems. It
  25382. also introduces a new "socksport auto" approach that should make it
  25383. easier to run multiple Tors on the same system, and does a lot of
  25384. cleanup to get us closer to a release candidate.
  25385. o Security/privacy fixes:
  25386. - Replace all potentially sensitive memory comparison operations
  25387. with versions whose runtime does not depend on the data being
  25388. compared. This will help resist a class of attacks where an
  25389. adversary can use variations in timing information to learn
  25390. sensitive data. Fix for one case of bug 3122. (Safe memcmp
  25391. implementation by Robert Ransom based partially on code by DJB.)
  25392. - When receiving a hidden service descriptor, check that it is for
  25393. the hidden service we wanted. Previously, Tor would store any
  25394. hidden service descriptors that a directory gave it, whether it
  25395. wanted them or not. This wouldn't have let an attacker impersonate
  25396. a hidden service, but it did let directories pre-seed a client
  25397. with descriptors that it didn't want. Bugfix on 0.0.6.
  25398. - On SIGHUP, do not clear out all TrackHostExits mappings, client
  25399. DNS cache entries, and virtual address mappings: that's what
  25400. NEWNYM is for. Fixes bug 1345; bugfix on 0.1.0.1-rc.
  25401. o Major features:
  25402. - The options SocksPort, ControlPort, and so on now all accept a
  25403. value "auto" that opens a socket on an OS-selected port. A
  25404. new ControlPortWriteToFile option tells Tor to write its
  25405. actual control port or ports to a chosen file. If the option
  25406. ControlPortFileGroupReadable is set, the file is created as
  25407. group-readable. Now users can run two Tor clients on the same
  25408. system without needing to manually mess with parameters. Resolves
  25409. part of ticket 3076.
  25410. - Set SO_REUSEADDR on all sockets, not just listeners. This should
  25411. help busy exit nodes avoid running out of useable ports just
  25412. because all the ports have been used in the near past. Resolves
  25413. issue 2850.
  25414. o Minor features:
  25415. - New "GETINFO net/listeners/(type)" controller command to return
  25416. a list of addresses and ports that are bound for listeners for a
  25417. given connection type. This is useful when the user has configured
  25418. "SocksPort auto" and the controller needs to know which port got
  25419. chosen. Resolves another part of ticket 3076.
  25420. - Add a new ControlSocketsGroupWritable configuration option: when
  25421. it is turned on, ControlSockets are group-writeable by the default
  25422. group of the current user. Patch by Jérémy Bobbio; implements
  25423. ticket 2972.
  25424. - Tor now refuses to create a ControlSocket in a directory that is
  25425. world-readable (or group-readable if ControlSocketsGroupWritable
  25426. is 0). This is necessary because some operating systems do not
  25427. enforce permissions on an AF_UNIX sockets. Permissions on the
  25428. directory holding the socket, however, seems to work everywhere.
  25429. - Rate-limit a warning about failures to download v2 networkstatus
  25430. documents. Resolves part of bug 1352.
  25431. - Backport code from 0.2.3.x that allows directory authorities to
  25432. clean their microdescriptor caches. Needed to resolve bug 2230.
  25433. - When an HTTPS proxy reports "403 Forbidden", we now explain
  25434. what it means rather than calling it an unexpected status code.
  25435. Closes bug 2503. Patch from Michael Yakubovich.
  25436. - Update to the May 1 2011 Maxmind GeoLite Country database.
  25437. o Minor bugfixes:
  25438. - Authorities now clean their microdesc cache periodically and when
  25439. reading from disk initially, not only when adding new descriptors.
  25440. This prevents a bug where we could lose microdescriptors. Bugfix
  25441. on 0.2.2.6-alpha. Fixes bug 2230.
  25442. - Do not crash when our configuration file becomes unreadable, for
  25443. example due to a permissions change, between when we start up
  25444. and when a controller calls SAVECONF. Fixes bug 3135; bugfix
  25445. on 0.0.9pre6.
  25446. - Avoid a bug that would keep us from replacing a microdescriptor
  25447. cache on Windows. (We would try to replace the file while still
  25448. holding it open. That's fine on Unix, but Windows doesn't let us
  25449. do that.) Bugfix on 0.2.2.6-alpha; bug found by wanoskarnet.
  25450. - Add missing explanations for the authority-related torrc options
  25451. RephistTrackTime, BridgePassword, and V3AuthUseLegacyKey in the
  25452. man page. Resolves issue 2379.
  25453. - As an authority, do not upload our own vote or signature set to
  25454. ourself. It would tell us nothing new, and as of 0.2.2.24-alpha,
  25455. it would get flagged as a duplicate. Resolves bug 3026.
  25456. - Accept hidden service descriptors if we think we might be a hidden
  25457. service directory, regardless of what our consensus says. This
  25458. helps robustness, since clients and hidden services can sometimes
  25459. have a more up-to-date view of the network consensus than we do,
  25460. and if they think that the directory authorities list us a HSDir,
  25461. we might actually be one. Related to bug 2732; bugfix on
  25462. 0.2.0.10-alpha.
  25463. - When a controller changes TrackHostExits, remove mappings for
  25464. hosts that should no longer have their exits tracked. Bugfix on
  25465. 0.1.0.1-rc.
  25466. - When a controller changes VirtualAddrNetwork, remove any mappings
  25467. for hosts that were automapped to the old network. Bugfix on
  25468. 0.1.1.19-rc.
  25469. - When a controller changes one of the AutomapHosts* options, remove
  25470. any mappings for hosts that should no longer be automapped. Bugfix
  25471. on 0.2.0.1-alpha.
  25472. - Do not reset the bridge descriptor download status every time we
  25473. re-parse our configuration or get a configuration change. Fixes
  25474. bug 3019; bugfix on 0.2.0.3-alpha.
  25475. o Minor bugfixes (code cleanup):
  25476. - When loading the microdesc journal, remember its current size.
  25477. In 0.2.2, this helps prevent the microdesc journal from growing
  25478. without limit on authorities (who are the only ones to use it in
  25479. 0.2.2). Fixes a part of bug 2230; bugfix on 0.2.2.6-alpha.
  25480. Fix posted by "cypherpunks."
  25481. - The microdesc journal is supposed to get rebuilt only if it is
  25482. at least _half_ the length of the store, not _twice_ the length
  25483. of the store. Bugfix on 0.2.2.6-alpha; fixes part of bug 2230.
  25484. - Fix a potential null-pointer dereference while computing a
  25485. consensus. Bugfix on 0.2.0.3-alpha, found with the help of
  25486. clang's analyzer.
  25487. - Avoid a possible null-pointer dereference when rebuilding the mdesc
  25488. cache without actually having any descriptors to cache. Bugfix on
  25489. 0.2.2.6-alpha. Issue discovered using clang's static analyzer.
  25490. - If we fail to compute the identity digest of a v3 legacy keypair,
  25491. warn, and don't use a buffer-full of junk instead. Bugfix on
  25492. 0.2.1.1-alpha; fixes bug 3106.
  25493. - Resolve an untriggerable issue in smartlist_string_num_isin(),
  25494. where if the function had ever in the future been used to check
  25495. for the presence of a too-large number, it would have given an
  25496. incorrect result. (Fortunately, we only used it for 16-bit
  25497. values.) Fixes bug 3175; bugfix on 0.1.0.1-rc.
  25498. - Require that introduction point keys and onion handshake keys
  25499. have a public exponent of 65537. Starts to fix bug 3207; bugfix
  25500. on 0.2.0.10-alpha.
  25501. o Removed features:
  25502. - Caches no longer download and serve v2 networkstatus documents
  25503. unless FetchV2Networkstatus flag is set: these documents haven't
  25504. haven't been used by clients or relays since 0.2.0.x. Resolves
  25505. bug 3022.
  25506. Changes in version 0.2.3.1-alpha - 2011-05-05
  25507. Tor 0.2.3.1-alpha adds some new experimental features, including support
  25508. for an improved network IO backend, IOCP networking on Windows,
  25509. microdescriptor caching, "fast-start" support for streams, and automatic
  25510. home router configuration. There are also numerous internal improvements
  25511. to try to make the code easier for developers to work with.
  25512. This is the first alpha release in a new series, so expect there to be
  25513. bugs. Users who would rather test out a more stable branch should
  25514. stay with 0.2.2.x for now.
  25515. o Major features:
  25516. - Tor can now optionally build with the "bufferevents" buffered IO
  25517. backend provided by Libevent 2. To use this feature, make sure you
  25518. have the latest possible version of Libevent, and pass the
  25519. --enable-bufferevents flag to configure when building Tor from
  25520. source. This feature will make our networking code more flexible,
  25521. let us stack layers on each other, and let us use more efficient
  25522. zero-copy transports where available.
  25523. - As an experimental feature, Tor can use IOCP for networking on Windows.
  25524. Once this code is tuned and optimized, it promises much better
  25525. performance than the select-based backend we've used in the past. To
  25526. try this feature, you must build Tor with Libevent 2, configure Tor
  25527. with the "bufferevents" buffered IO backend, and add "DisableIOCP 0" to
  25528. your torrc. There are known bugs here: only try this if you can help
  25529. debug it as it breaks.
  25530. - The EntryNodes option can now include country codes like {de} or IP
  25531. addresses or network masks. Previously we had disallowed these options
  25532. because we didn't have an efficient way to keep the list up to
  25533. date. Fixes bug 1982, but see bug 2798 for an unresolved issue here.
  25534. - Exit nodes now accept and queue data on not-yet-connected streams.
  25535. Previously, the client wasn't allowed to send data until the stream was
  25536. connected, which slowed down all connections. This change will enable
  25537. clients to perform a "fast-start" on streams and send data without
  25538. having to wait for a confirmation that the stream has opened. (Patch
  25539. from Ian Goldberg; implements the server side of Proposal 174.)
  25540. - Tor now has initial support for automatic port mapping on the many
  25541. home routers that support NAT-PMP or UPnP. (Not yet supported on
  25542. Windows). To build the support code, you'll need to have libnatpnp
  25543. library and/or the libminiupnpc library, and you'll need to enable the
  25544. feature specifically by passing "--enable-upnp" and/or
  25545. "--enable-natpnp" to configure. To turn it on, use the new
  25546. PortForwarding option.
  25547. - Caches now download, cache, and serve multiple "flavors" of the
  25548. consensus, including a flavor that describes microdescriptors.
  25549. - Caches now download, cache, and serve microdescriptors -- small
  25550. summaries of router descriptors that are authenticated by all of the
  25551. directory authorities. Once enough caches are running this code,
  25552. clients will be able to save significant amounts of directory bandwidth
  25553. by downloading microdescriptors instead of router descriptors.
  25554. o Minor features:
  25555. - Make logging resolution configurable with a new LogTimeGranularity
  25556. option, and change the default from 1 millisecond to 1 second.
  25557. Implements enhancement 1668.
  25558. - We log which torrc file we're using on startup. Implements ticket
  25559. 2444.
  25560. - Ordinarily, Tor does not count traffic from private addresses (like
  25561. 127.0.0.1 or 10.0.0.1) when calculating rate limits or accounting.
  25562. There is now a new option, CountPrivateBandwidth, to disable this
  25563. behavior. Patch from Daniel Cagara.
  25564. - New --enable-static-tor configure option for building Tor as
  25565. statically as possible. Idea, general hackery and thoughts from
  25566. Alexei Czeskis, John Gilmore, Jacob Appelbaum. Implements ticket
  25567. 2702.
  25568. - If you set the NumCPUs option to 0, Tor will now try to detect how
  25569. many CPUs you have. This is the new default behavior.
  25570. - Turn on directory request statistics by default and include them in
  25571. extra-info descriptors. Don't break if we have no GeoIP database.
  25572. - Relays that set "ConnDirectionStatistics 1" write statistics on the
  25573. bidirectional use of connections to disk every 24 hours.
  25574. - Add a GeoIP file digest to the extra-info descriptor. Implements
  25575. enhancement 1883.
  25576. - The NodeFamily option -- which let you declare that you want to
  25577. consider nodes to be part of a family whether they list themselves
  25578. that way or not -- now allows IP address ranges and country codes.
  25579. - Add a new 'Heartbeat' log message type to periodically log a message
  25580. describing Tor's status at level Notice. This feature is meant for
  25581. operators who log at notice, and want to make sure that their Tor
  25582. server is still working. Implementation by George Kadianakis.
  25583. o Minor bugfixes (on 0.2.2.25-alpha):
  25584. - When loading the microdesc journal, remember its current size.
  25585. In 0.2.2, this helps prevent the microdesc journal from growing
  25586. without limit on authorities (who are the only ones to use it in
  25587. 0.2.2). Fixes a part of bug 2230; bugfix on 0.2.2.6-alpha.
  25588. Fix posted by "cypherpunks."
  25589. - The microdesc journal is supposed to get rebuilt only if it is
  25590. at least _half_ the length of the store, not _twice_ the length
  25591. of the store. Bugfix on 0.2.2.6-alpha; fixes part of bug 2230.
  25592. - If as an authority we fail to compute the identity digest of a v3
  25593. legacy keypair, warn, and don't use a buffer-full of junk instead.
  25594. Bugfix on 0.2.1.1-alpha; fixes bug 3106.
  25595. - Authorities now clean their microdesc cache periodically and when
  25596. reading from disk initially, not only when adding new descriptors.
  25597. This prevents a bug where we could lose microdescriptors. Bugfix
  25598. on 0.2.2.6-alpha.
  25599. o Minor features (controller):
  25600. - Add a new SIGNAL event to the controller interface so that
  25601. controllers can be notified when Tor handles a signal. Resolves
  25602. issue 1955. Patch by John Brooks.
  25603. - Add a new GETINFO option to get total bytes read and written. Patch
  25604. from pipe, revised by atagar. Resolves ticket 2345.
  25605. - Implement some GETINFO controller fields to provide information about
  25606. the Tor process's pid, euid, username, and resource limits.
  25607. o Build changes:
  25608. - Our build system requires automake 1.6 or later to create the
  25609. Makefile.in files. Previously, you could have used 1.4.
  25610. This only affects developers and people building Tor from git;
  25611. people who build Tor from the source distribution without changing
  25612. the Makefile.am files should be fine.
  25613. - Our autogen.sh script uses autoreconf to launch autoconf, automake, and
  25614. so on. This is more robust against some of the failure modes
  25615. associated with running the autotools pieces on their own.
  25616. o Minor packaging issues:
  25617. - On OpenSUSE, create the /var/run/tor directory on startup if it is not
  25618. already created. Patch from Andreas Stieger. Fixes bug 2573.
  25619. o Code simplifications and refactoring:
  25620. - A major revision to our internal node-selecting and listing logic.
  25621. Tor already had at least two major ways to look at the question of
  25622. "which Tor servers do we know about": a list of router descriptors,
  25623. and a list of entries in the current consensus. With
  25624. microdescriptors, we're adding a third. Having so many systems
  25625. without an abstraction layer over them was hurting the codebase.
  25626. Now, we have a new "node_t" abstraction that presents a consistent
  25627. interface to a client's view of a Tor node, and holds (nearly) all
  25628. of the mutable state formerly in routerinfo_t and routerstatus_t.
  25629. - The helper programs tor-gencert, tor-resolve, and tor-checkkey
  25630. no longer link against Libevent: they never used it, but
  25631. our library structure used to force them to link it.
  25632. o Removed features:
  25633. - Remove some old code to work around even older versions of Tor that
  25634. used forked processes to handle DNS requests. Such versions of Tor
  25635. are no longer in use as servers.
  25636. o Documentation fixes:
  25637. - Correct a broken faq link in the INSTALL file. Fixes bug 2307.
  25638. - Add missing documentation for the authority-related torrc options
  25639. RephistTrackTime, BridgePassword, and V3AuthUseLegacyKey. Resolves
  25640. issue 2379.
  25641. Changes in version 0.2.2.25-alpha - 2011-04-29
  25642. Tor 0.2.2.25-alpha fixes many bugs: hidden service clients are more
  25643. robust, routers no longer overreport their bandwidth, Win7 should crash
  25644. a little less, and NEWNYM (as used by Vidalia's "new identity" button)
  25645. now prevents hidden service-related activity from being linkable. It
  25646. provides more information to Vidalia so you can see if your bridge is
  25647. working. Also, 0.2.2.25-alpha revamps the Entry/Exit/ExcludeNodes and
  25648. StrictNodes configuration options to make them more reliable, more
  25649. understandable, and more regularly applied. If you use those options,
  25650. please see the revised documentation for them in the manual page.
  25651. o Major bugfixes:
  25652. - Relays were publishing grossly inflated bandwidth values because
  25653. they were writing their state files wrong--now they write the
  25654. correct value. Also, resume reading bandwidth history from the
  25655. state file correctly. Fixes bug 2704; bugfix on 0.2.2.23-alpha.
  25656. - Improve hidden service robustness: When we find that we have
  25657. extended a hidden service's introduction circuit to a relay not
  25658. listed as an introduction point in the HS descriptor we currently
  25659. have, retry with an introduction point from the current
  25660. descriptor. Previously we would just give up. Fixes bugs 1024 and
  25661. 1930; bugfix on 0.2.0.10-alpha.
  25662. - Clients now stop trying to use an exit node associated with a given
  25663. destination by TrackHostExits if they fail to reach that exit node.
  25664. Fixes bug 2999. Bugfix on 0.2.0.20-rc.
  25665. - Fix crash bug on platforms where gmtime and localtime can return
  25666. NULL. Windows 7 users were running into this one. Fixes part of bug
  25667. 2077. Bugfix on all versions of Tor. Found by boboper.
  25668. o Security and stability fixes:
  25669. - Don't double-free a parsable, but invalid, microdescriptor, even if
  25670. it is followed in the blob we're parsing by an unparsable
  25671. microdescriptor. Fixes an issue reported in a comment on bug 2954.
  25672. Bugfix on 0.2.2.6-alpha; fix by "cypherpunks".
  25673. - If the Nickname configuration option isn't given, Tor would pick a
  25674. nickname based on the local hostname as the nickname for a relay.
  25675. Because nicknames are not very important in today's Tor and the
  25676. "Unnamed" nickname has been implemented, this is now problematic
  25677. behavior: It leaks information about the hostname without being
  25678. useful at all. Fixes bug 2979; bugfix on 0.1.2.2-alpha, which
  25679. introduced the Unnamed nickname. Reported by tagnaq.
  25680. - Fix an uncommon assertion failure when running with DNSPort under
  25681. heavy load. Fixes bug 2933; bugfix on 0.2.0.1-alpha.
  25682. - Avoid linkability based on cached hidden service descriptors: forget
  25683. all hidden service descriptors cached as a client when processing a
  25684. SIGNAL NEWNYM command. Fixes bug 3000; bugfix on 0.0.6.
  25685. o Major features:
  25686. - Export GeoIP information on bridge usage to controllers even if we
  25687. have not yet been running for 24 hours. Now Vidalia bridge operators
  25688. can get more accurate and immediate feedback about their
  25689. contributions to the network.
  25690. o Major features and bugfixes (node selection):
  25691. - Revise and reconcile the meaning of the ExitNodes, EntryNodes,
  25692. ExcludeEntryNodes, ExcludeExitNodes, ExcludeNodes, and StrictNodes
  25693. options. Previously, we had been ambiguous in describing what
  25694. counted as an "exit" node, and what operations exactly "StrictNodes
  25695. 0" would permit. This created confusion when people saw nodes built
  25696. through unexpected circuits, and made it hard to tell real bugs from
  25697. surprises. Now the intended behavior is:
  25698. . "Exit", in the context of ExitNodes and ExcludeExitNodes, means
  25699. a node that delivers user traffic outside the Tor network.
  25700. . "Entry", in the context of EntryNodes, means a node used as the
  25701. first hop of a multihop circuit. It doesn't include direct
  25702. connections to directory servers.
  25703. . "ExcludeNodes" applies to all nodes.
  25704. . "StrictNodes" changes the behavior of ExcludeNodes only. When
  25705. StrictNodes is set, Tor should avoid all nodes listed in
  25706. ExcludeNodes, even when it will make user requests fail. When
  25707. StrictNodes is *not* set, then Tor should follow ExcludeNodes
  25708. whenever it can, except when it must use an excluded node to
  25709. perform self-tests, connect to a hidden service, provide a
  25710. hidden service, fulfill a .exit request, upload directory
  25711. information, or fetch directory information.
  25712. Collectively, the changes to implement the behavior fix bug 1090.
  25713. - ExcludeNodes now takes precedence over EntryNodes and ExitNodes: if
  25714. a node is listed in both, it's treated as excluded.
  25715. - ExcludeNodes now applies to directory nodes -- as a preference if
  25716. StrictNodes is 0, or an absolute requirement if StrictNodes is 1.
  25717. Don't exclude all the directory authorities and set StrictNodes to 1
  25718. unless you really want your Tor to break.
  25719. - ExcludeNodes and ExcludeExitNodes now override exit enclaving.
  25720. - ExcludeExitNodes now overrides .exit requests.
  25721. - We don't use bridges listed in ExcludeNodes.
  25722. - When StrictNodes is 1:
  25723. . We now apply ExcludeNodes to hidden service introduction points
  25724. and to rendezvous points selected by hidden service users. This
  25725. can make your hidden service less reliable: use it with caution!
  25726. . If we have used ExcludeNodes on ourself, do not try relay
  25727. reachability self-tests.
  25728. . If we have excluded all the directory authorities, we will not
  25729. even try to upload our descriptor if we're a relay.
  25730. . Do not honor .exit requests to an excluded node.
  25731. - Remove a misfeature that caused us to ignore the Fast/Stable flags
  25732. when ExitNodes is set. Bugfix on 0.2.2.7-alpha.
  25733. - When the set of permitted nodes changes, we now remove any mappings
  25734. introduced via TrackExitHosts to now-excluded nodes. Bugfix on
  25735. 0.1.0.1-rc.
  25736. - We never cannibalize a circuit that had excluded nodes on it, even
  25737. if StrictNodes is 0. Bugfix on 0.1.0.1-rc.
  25738. - Revert a change where we would be laxer about attaching streams to
  25739. circuits than when building the circuits. This was meant to prevent
  25740. a set of bugs where streams were never attachable, but our improved
  25741. code here should make this unnecessary. Bugfix on 0.2.2.7-alpha.
  25742. - Keep track of how many times we launch a new circuit to handle a
  25743. given stream. Too many launches could indicate an inconsistency
  25744. between our "launch a circuit to handle this stream" logic and our
  25745. "attach this stream to one of the available circuits" logic.
  25746. - Improve log messages related to excluded nodes.
  25747. o Minor bugfixes:
  25748. - Fix a spurious warning when moving from a short month to a long
  25749. month on relays with month-based BandwidthAccounting. Bugfix on
  25750. 0.2.2.17-alpha; fixes bug 3020.
  25751. - When a client finds that an origin circuit has run out of 16-bit
  25752. stream IDs, we now mark it as unusable for new streams. Previously,
  25753. we would try to close the entire circuit. Bugfix on 0.0.6.
  25754. - Add a forgotten cast that caused a compile warning on OS X 10.6.
  25755. Bugfix on 0.2.2.24-alpha.
  25756. - Be more careful about reporting the correct error from a failed
  25757. connect() system call. Under some circumstances, it was possible to
  25758. look at an incorrect value for errno when sending the end reason.
  25759. Bugfix on 0.1.0.1-rc.
  25760. - Correctly handle an "impossible" overflow cases in connection byte
  25761. counting, where we write or read more than 4GB on an edge connection
  25762. in a single second. Bugfix on 0.1.2.8-beta.
  25763. - Correct the warning displayed when a rendezvous descriptor exceeds
  25764. the maximum size. Fixes bug 2750; bugfix on 0.2.1.5-alpha. Found by
  25765. John Brooks.
  25766. - Clients and hidden services now use HSDir-flagged relays for hidden
  25767. service descriptor downloads and uploads even if the relays have no
  25768. DirPort set and the client has disabled TunnelDirConns. This will
  25769. eventually allow us to give the HSDir flag to relays with no
  25770. DirPort. Fixes bug 2722; bugfix on 0.2.1.6-alpha.
  25771. - Downgrade "no current certificates known for authority" message from
  25772. Notice to Info. Fixes bug 2899; bugfix on 0.2.0.10-alpha.
  25773. - Make the SIGNAL DUMP control-port command work on FreeBSD. Fixes bug
  25774. 2917. Bugfix on 0.1.1.1-alpha.
  25775. - Only limit the lengths of single HS descriptors, even when multiple
  25776. HS descriptors are published to an HSDir relay in a single POST
  25777. operation. Fixes bug 2948; bugfix on 0.2.1.5-alpha. Found by hsdir.
  25778. - Write the current time into the LastWritten line in our state file,
  25779. rather than the time from the previous write attempt. Also, stop
  25780. trying to use a time of -1 in our log statements. Fixes bug 3039;
  25781. bugfix on 0.2.2.14-alpha.
  25782. - Be more consistent in our treatment of file system paths. "~" should
  25783. get expanded to the user's home directory in the Log config option.
  25784. Fixes bug 2971; bugfix on 0.2.0.1-alpha, which introduced the
  25785. feature for the -f and --DataDirectory options.
  25786. o Minor features:
  25787. - Make sure every relay writes a state file at least every 12 hours.
  25788. Previously, a relay could go for weeks without writing its state
  25789. file, and on a crash could lose its bandwidth history, capacity
  25790. estimates, client country statistics, and so on. Addresses bug 3012.
  25791. - Send END_STREAM_REASON_NOROUTE in response to EHOSTUNREACH errors.
  25792. Clients before 0.2.1.27 didn't handle NOROUTE correctly, but such
  25793. clients are already deprecated because of security bugs.
  25794. - Don't allow v0 hidden service authorities to act as clients.
  25795. Required by fix for bug 3000.
  25796. - Ignore SIGNAL NEWNYM commands on relay-only Tor instances. Required
  25797. by fix for bug 3000.
  25798. - Ensure that no empty [dirreq-](read|write)-history lines are added
  25799. to an extrainfo document. Implements ticket 2497.
  25800. o Code simplification and refactoring:
  25801. - Remove workaround code to handle directory responses from servers
  25802. that had bug 539 (they would send HTTP status 503 responses _and_
  25803. send a body too). Since only server versions before
  25804. 0.2.0.16-alpha/0.1.2.19 were affected, there is no longer reason to
  25805. keep the workaround in place.
  25806. - Remove the old 'fuzzy time' logic. It was supposed to be used for
  25807. handling calculations where we have a known amount of clock skew and
  25808. an allowed amount of unknown skew. But we only used it in three
  25809. places, and we never adjusted the known/unknown skew values. This is
  25810. still something we might want to do someday, but if we do, we'll
  25811. want to do it differently.
  25812. - Avoid signed/unsigned comparisons by making SIZE_T_CEILING unsigned.
  25813. None of the cases where we did this before were wrong, but by making
  25814. this change we avoid warnings. Fixes bug 2475; bugfix on 0.2.1.28.
  25815. - Use GetTempDir to find the proper temporary directory location on
  25816. Windows when generating temporary files for the unit tests. Patch by
  25817. Gisle Vanem.
  25818. Changes in version 0.2.2.24-alpha - 2011-04-08
  25819. Tor 0.2.2.24-alpha fixes a variety of bugs, including a big bug that
  25820. prevented Tor clients from effectively using "multihomed" bridges,
  25821. that is, bridges that listen on multiple ports or IP addresses so users
  25822. can continue to use some of their addresses even if others get blocked.
  25823. o Major bugfixes:
  25824. - Fix a bug where bridge users who configure the non-canonical
  25825. address of a bridge automatically switch to its canonical
  25826. address. If a bridge listens at more than one address, it should be
  25827. able to advertise those addresses independently and any non-blocked
  25828. addresses should continue to work. Bugfix on Tor 0.2.0.x. Fixes
  25829. bug 2510.
  25830. - If you configured Tor to use bridge A, and then quit and
  25831. configured Tor to use bridge B instead, it would happily continue
  25832. to use bridge A if it's still reachable. While this behavior is
  25833. a feature if your goal is connectivity, in some scenarios it's a
  25834. dangerous bug. Bugfix on Tor 0.2.0.1-alpha; fixes bug 2511.
  25835. - Directory authorities now use data collected from their own
  25836. uptime observations when choosing whether to assign the HSDir flag
  25837. to relays, instead of trusting the uptime value the relay reports in
  25838. its descriptor. This change helps prevent an attack where a small
  25839. set of nodes with frequently-changing identity keys can blackhole
  25840. a hidden service. (Only authorities need upgrade; others will be
  25841. fine once they do.) Bugfix on 0.2.0.10-alpha; fixes bug 2709.
  25842. o Minor bugfixes:
  25843. - When we restart our relay, we might get a successful connection
  25844. from the outside before we've started our reachability tests,
  25845. triggering a warning: "ORPort found reachable, but I have no
  25846. routerinfo yet. Failing to inform controller of success." This
  25847. bug was harmless unless Tor is running under a controller
  25848. like Vidalia, in which case the controller would never get a
  25849. REACHABILITY_SUCCEEDED status event. Bugfix on 0.1.2.6-alpha;
  25850. fixes bug 1172.
  25851. - Make directory authorities more accurate at recording when
  25852. relays that have failed several reachability tests became
  25853. unreachable, so we can provide more accuracy at assigning Stable,
  25854. Guard, HSDir, etc flags. Bugfix on 0.2.0.6-alpha. Resolves bug 2716.
  25855. - Fix an issue that prevented static linking of libevent on
  25856. some platforms (notably Linux). Fixes bug 2698; bugfix on
  25857. versions 0.2.1.23/0.2.2.8-alpha (the versions introducing
  25858. the --with-static-libevent configure option).
  25859. - We now ask the other side of a stream (the client or the exit)
  25860. for more data on that stream when the amount of queued data on
  25861. that stream dips low enough. Previously, we wouldn't ask the
  25862. other side for more data until either it sent us more data (which
  25863. it wasn't supposed to do if it had exhausted its window!) or we
  25864. had completely flushed all our queued data. This flow control fix
  25865. should improve throughput. Fixes bug 2756; bugfix on the earliest
  25866. released versions of Tor (svn commit r152).
  25867. - Avoid a double-mark-for-free warning when failing to attach a
  25868. transparent proxy connection. (We thought we had fixed this in
  25869. 0.2.2.23-alpha, but it turns out our fix was checking the wrong
  25870. connection.) Fixes bug 2757; bugfix on 0.1.2.1-alpha (the original
  25871. bug) and 0.2.2.23-alpha (the incorrect fix).
  25872. - When warning about missing zlib development packages during compile,
  25873. give the correct package names. Bugfix on 0.2.0.1-alpha.
  25874. o Minor features:
  25875. - Directory authorities now log the source of a rejected POSTed v3
  25876. networkstatus vote.
  25877. - Make compilation with clang possible when using
  25878. --enable-gcc-warnings by removing two warning options that clang
  25879. hasn't implemented yet and by fixing a few warnings. Implements
  25880. ticket 2696.
  25881. - When expiring circuits, use microsecond timers rather than
  25882. one-second timers. This can avoid an unpleasant situation where a
  25883. circuit is launched near the end of one second and expired right
  25884. near the beginning of the next, and prevent fluctuations in circuit
  25885. timeout values.
  25886. - Use computed circuit-build timeouts to decide when to launch
  25887. parallel introduction circuits for hidden services. (Previously,
  25888. we would retry after 15 seconds.)
  25889. - Update to the April 1 2011 Maxmind GeoLite Country database.
  25890. o Packaging fixes:
  25891. - Create the /var/run/tor directory on startup on OpenSUSE if it is
  25892. not already created. Patch from Andreas Stieger. Fixes bug 2573.
  25893. o Documentation changes:
  25894. - Modernize the doxygen configuration file slightly. Fixes bug 2707.
  25895. - Resolve all doxygen warnings except those for missing documentation.
  25896. Fixes bug 2705.
  25897. - Add doxygen documentation for more functions, fields, and types.
  25898. Changes in version 0.2.2.23-alpha - 2011-03-08
  25899. Tor 0.2.2.23-alpha lets relays record their bandwidth history so when
  25900. they restart they don't lose their bandwidth capacity estimate. This
  25901. release also fixes a diverse set of user-facing bugs, ranging from
  25902. relays overrunning their rate limiting to clients falsely warning about
  25903. clock skew to bridge descriptor leaks by our bridge directory authority.
  25904. o Major bugfixes:
  25905. - Stop sending a CLOCK_SKEW controller status event whenever
  25906. we fetch directory information from a relay that has a wrong clock.
  25907. Instead, only inform the controller when it's a trusted authority
  25908. that claims our clock is wrong. Bugfix on 0.1.2.6-alpha; fixes
  25909. the rest of bug 1074.
  25910. - Fix an assert in parsing router descriptors containing IPv6
  25911. addresses. This one took down the directory authorities when
  25912. somebody tried some experimental code. Bugfix on 0.2.1.3-alpha.
  25913. - Make the bridge directory authority refuse to answer directory
  25914. requests for "all" descriptors. It used to include bridge
  25915. descriptors in its answer, which was a major information leak.
  25916. Found by "piebeer". Bugfix on 0.2.0.3-alpha.
  25917. - If relays set RelayBandwidthBurst but not RelayBandwidthRate,
  25918. Tor would ignore their RelayBandwidthBurst setting,
  25919. potentially using more bandwidth than expected. Bugfix on
  25920. 0.2.0.1-alpha. Reported by Paul Wouters. Fixes bug 2470.
  25921. - Ignore and warn if the user mistakenly sets "PublishServerDescriptor
  25922. hidserv" in her torrc. The 'hidserv' argument never controlled
  25923. publication of hidden service descriptors. Bugfix on 0.2.0.1-alpha.
  25924. o Major features:
  25925. - Relays now save observed peak bandwidth throughput rates to their
  25926. state file (along with total usage, which was already saved)
  25927. so that they can determine their correct estimated bandwidth on
  25928. restart. Resolves bug 1863, where Tor relays would reset their
  25929. estimated bandwidth to 0 after restarting.
  25930. - Directory authorities now take changes in router IP address and
  25931. ORPort into account when determining router stability. Previously,
  25932. if a router changed its IP or ORPort, the authorities would not
  25933. treat it as having any downtime for the purposes of stability
  25934. calculation, whereas clients would experience downtime since the
  25935. change could take a while to propagate to them. Resolves issue 1035.
  25936. - Enable Address Space Layout Randomization (ASLR) and Data Execution
  25937. Prevention (DEP) by default on Windows to make it harder for
  25938. attackers to exploit vulnerabilities. Patch from John Brooks.
  25939. o Minor bugfixes (on 0.2.1.x and earlier):
  25940. - Fix a rare crash bug that could occur when a client was configured
  25941. with a large number of bridges. Fixes bug 2629; bugfix on
  25942. 0.2.1.2-alpha. Bugfix by trac user "shitlei".
  25943. - Avoid a double mark-for-free warning when failing to attach a
  25944. transparent proxy connection. Bugfix on 0.1.2.1-alpha. Fixes
  25945. bug 2279.
  25946. - Correctly detect failure to allocate an OpenSSL BIO. Fixes bug 2378;
  25947. found by "cypherpunks". This bug was introduced before the first
  25948. Tor release, in svn commit r110.
  25949. - Country codes aren't supported in EntryNodes until 0.2.3.x, so
  25950. don't mention them in the manpage. Fixes bug 2450; issue
  25951. spotted by keb and G-Lo.
  25952. - Fix a bug in bandwidth history state parsing that could have been
  25953. triggered if a future version of Tor ever changed the timing
  25954. granularity at which bandwidth history is measured. Bugfix on
  25955. Tor 0.1.1.11-alpha.
  25956. - When a relay decides that its DNS is too broken for it to serve
  25957. as an exit server, it advertised itself as a non-exit, but
  25958. continued to act as an exit. This could create accidental
  25959. partitioning opportunities for users. Instead, if a relay is
  25960. going to advertise reject *:* as its exit policy, it should
  25961. really act with exit policy "reject *:*". Fixes bug 2366.
  25962. Bugfix on Tor 0.1.2.5-alpha. Bugfix by user "postman" on trac.
  25963. - In the special case where you configure a public exit relay as your
  25964. bridge, Tor would be willing to use that exit relay as the last
  25965. hop in your circuit as well. Now we fail that circuit instead.
  25966. Bugfix on 0.2.0.12-alpha. Fixes bug 2403. Reported by "piebeer".
  25967. - Fix a bug with our locking implementation on Windows that couldn't
  25968. correctly detect when a file was already locked. Fixes bug 2504,
  25969. bugfix on 0.2.1.6-alpha.
  25970. - Fix IPv6-related connect() failures on some platforms (BSD, OS X).
  25971. Bugfix on 0.2.0.3-alpha; fixes first part of bug 2660. Patch by
  25972. "piebeer".
  25973. - Set target port in get_interface_address6() correctly. Bugfix
  25974. on 0.1.1.4-alpha and 0.2.0.3-alpha; fixes second part of bug 2660.
  25975. - Directory authorities are now more robust to hops back in time
  25976. when calculating router stability. Previously, if a run of uptime
  25977. or downtime appeared to be negative, the calculation could give
  25978. incorrect results. Bugfix on 0.2.0.6-alpha; noticed when fixing
  25979. bug 1035.
  25980. - Fix an assert that got triggered when using the TestingTorNetwork
  25981. configuration option and then issuing a GETINFO config-text control
  25982. command. Fixes bug 2250; bugfix on 0.2.1.2-alpha.
  25983. o Minor bugfixes (on 0.2.2.x):
  25984. - Clients should not weight BadExit nodes as Exits in their node
  25985. selection. Similarly, directory authorities should not count BadExit
  25986. bandwidth as Exit bandwidth when computing bandwidth-weights.
  25987. Bugfix on 0.2.2.10-alpha; fixes bug 2203.
  25988. - Correctly clear our dir_read/dir_write history when there is an
  25989. error parsing any bw history value from the state file. Bugfix on
  25990. Tor 0.2.2.15-alpha.
  25991. - Resolve a bug in verifying signatures of directory objects
  25992. with digests longer than SHA1. Bugfix on 0.2.2.20-alpha.
  25993. Fixes bug 2409. Found by "piebeer".
  25994. - Bridge authorities no longer crash on SIGHUP when they try to
  25995. publish their relay descriptor to themselves. Fixes bug 2572. Bugfix
  25996. on 0.2.2.22-alpha.
  25997. o Minor features:
  25998. - Log less aggressively about circuit timeout changes, and improve
  25999. some other circuit timeout messages. Resolves bug 2004.
  26000. - Log a little more clearly about the times at which we're no longer
  26001. accepting new connections. Resolves bug 2181.
  26002. - Reject attempts at the client side to open connections to private
  26003. IP addresses (like 127.0.0.1, 10.0.0.1, and so on) with
  26004. a randomly chosen exit node. Attempts to do so are always
  26005. ill-defined, generally prevented by exit policies, and usually
  26006. in error. This will also help to detect loops in transparent
  26007. proxy configurations. You can disable this feature by setting
  26008. "ClientRejectInternalAddresses 0" in your torrc.
  26009. - Always treat failure to allocate an RSA key as an unrecoverable
  26010. allocation error.
  26011. - Update to the March 1 2011 Maxmind GeoLite Country database.
  26012. o Minor features (log subsystem):
  26013. - Add documentation for configuring logging at different severities in
  26014. different log domains. We've had this feature since 0.2.1.1-alpha,
  26015. but for some reason it never made it into the manpage. Fixes
  26016. bug 2215.
  26017. - Make it simpler to specify "All log domains except for A and B".
  26018. Previously you needed to say "[*,~A,~B]". Now you can just say
  26019. "[~A,~B]".
  26020. - Add a "LogMessageDomains 1" option to include the domains of log
  26021. messages along with the messages. Without this, there's no way
  26022. to use log domains without reading the source or doing a lot
  26023. of guessing.
  26024. o Packaging changes:
  26025. - Stop shipping the Tor specs files and development proposal documents
  26026. in the tarball. They are now in a separate git repository at
  26027. git://git.torproject.org/torspec.git
  26028. Changes in version 0.2.1.30 - 2011-02-23
  26029. Tor 0.2.1.30 fixes a variety of less critical bugs. The main other
  26030. change is a slight tweak to Tor's TLS handshake that makes relays
  26031. and bridges that run this new version reachable from Iran again.
  26032. We don't expect this tweak will win the arms race long-term, but it
  26033. buys us time until we roll out a better solution.
  26034. o Major bugfixes:
  26035. - Stop sending a CLOCK_SKEW controller status event whenever
  26036. we fetch directory information from a relay that has a wrong clock.
  26037. Instead, only inform the controller when it's a trusted authority
  26038. that claims our clock is wrong. Bugfix on 0.1.2.6-alpha; fixes
  26039. the rest of bug 1074.
  26040. - Fix a bounds-checking error that could allow an attacker to
  26041. remotely crash a directory authority. Bugfix on 0.2.1.5-alpha.
  26042. Found by "piebeer".
  26043. - If relays set RelayBandwidthBurst but not RelayBandwidthRate,
  26044. Tor would ignore their RelayBandwidthBurst setting,
  26045. potentially using more bandwidth than expected. Bugfix on
  26046. 0.2.0.1-alpha. Reported by Paul Wouters. Fixes bug 2470.
  26047. - Ignore and warn if the user mistakenly sets "PublishServerDescriptor
  26048. hidserv" in her torrc. The 'hidserv' argument never controlled
  26049. publication of hidden service descriptors. Bugfix on 0.2.0.1-alpha.
  26050. o Minor features:
  26051. - Adjust our TLS Diffie-Hellman parameters to match those used by
  26052. Apache's mod_ssl.
  26053. - Update to the February 1 2011 Maxmind GeoLite Country database.
  26054. o Minor bugfixes:
  26055. - Check for and reject overly long directory certificates and
  26056. directory tokens before they have a chance to hit any assertions.
  26057. Bugfix on 0.2.1.28. Found by "doorss".
  26058. - Bring the logic that gathers routerinfos and assesses the
  26059. acceptability of circuits into line. This prevents a Tor OP from
  26060. getting locked in a cycle of choosing its local OR as an exit for a
  26061. path (due to a .exit request) and then rejecting the circuit because
  26062. its OR is not listed yet. It also prevents Tor clients from using an
  26063. OR running in the same instance as an exit (due to a .exit request)
  26064. if the OR does not meet the same requirements expected of an OR
  26065. running elsewhere. Fixes bug 1859; bugfix on 0.1.0.1-rc.
  26066. o Packaging changes:
  26067. - Stop shipping the Tor specs files and development proposal documents
  26068. in the tarball. They are now in a separate git repository at
  26069. git://git.torproject.org/torspec.git
  26070. - Do not include Git version tags as though they are SVN tags when
  26071. generating a tarball from inside a repository that has switched
  26072. between branches. Bugfix on 0.2.1.15-rc; fixes bug 2402.
  26073. Changes in version 0.2.2.22-alpha - 2011-01-25
  26074. Tor 0.2.2.22-alpha fixes a few more less-critical security issues. The
  26075. main other change is a slight tweak to Tor's TLS handshake that makes
  26076. relays and bridges that run this new version reachable from Iran again.
  26077. We don't expect this tweak will win the arms race long-term, but it
  26078. will buy us a bit more time until we roll out a better solution.
  26079. o Major bugfixes:
  26080. - Fix a bounds-checking error that could allow an attacker to
  26081. remotely crash a directory authority. Bugfix on 0.2.1.5-alpha.
  26082. Found by "piebeer".
  26083. - Don't assert when changing from bridge to relay or vice versa
  26084. via the controller. The assert happened because we didn't properly
  26085. initialize our keys in this case. Bugfix on 0.2.2.18-alpha; fixes
  26086. bug 2433. Reported by bastik.
  26087. o Minor features:
  26088. - Adjust our TLS Diffie-Hellman parameters to match those used by
  26089. Apache's mod_ssl.
  26090. - Provide a log message stating which geoip file we're parsing
  26091. instead of just stating that we're parsing the geoip file.
  26092. Implements ticket 2432.
  26093. o Minor bugfixes:
  26094. - Check for and reject overly long directory certificates and
  26095. directory tokens before they have a chance to hit any assertions.
  26096. Bugfix on 0.2.1.28 / 0.2.2.20-alpha. Found by "doorss".
  26097. Changes in version 0.2.2.21-alpha - 2011-01-15
  26098. Tor 0.2.2.21-alpha includes all the patches from Tor 0.2.1.29, which
  26099. continues our recent code security audit work. The main fix resolves
  26100. a remote heap overflow vulnerability that can allow remote code
  26101. execution (CVE-2011-0427). Other fixes address a variety of assert
  26102. and crash bugs, most of which we think are hard to exploit remotely.
  26103. o Major bugfixes (security), also included in 0.2.1.29:
  26104. - Fix a heap overflow bug where an adversary could cause heap
  26105. corruption. This bug probably allows remote code execution
  26106. attacks. Reported by "debuger". Fixes CVE-2011-0427. Bugfix on
  26107. 0.1.2.10-rc.
  26108. - Prevent a denial-of-service attack by disallowing any
  26109. zlib-compressed data whose compression factor is implausibly
  26110. high. Fixes part of bug 2324; reported by "doorss".
  26111. - Zero out a few more keys in memory before freeing them. Fixes
  26112. bug 2384 and part of bug 2385. These key instances found by
  26113. "cypherpunks", based on Andrew Case's report about being able
  26114. to find sensitive data in Tor's memory space if you have enough
  26115. permissions. Bugfix on 0.0.2pre9.
  26116. o Major bugfixes (crashes), also included in 0.2.1.29:
  26117. - Prevent calls to Libevent from inside Libevent log handlers.
  26118. This had potential to cause a nasty set of crashes, especially
  26119. if running Libevent with debug logging enabled, and running
  26120. Tor with a controller watching for low-severity log messages.
  26121. Bugfix on 0.1.0.2-rc. Fixes bug 2190.
  26122. - Add a check for SIZE_T_MAX to tor_realloc() to try to avoid
  26123. underflow errors there too. Fixes the other part of bug 2324.
  26124. - Fix a bug where we would assert if we ever had a
  26125. cached-descriptors.new file (or another file read directly into
  26126. memory) of exactly SIZE_T_CEILING bytes. Fixes bug 2326; bugfix
  26127. on 0.2.1.25. Found by doorss.
  26128. - Fix some potential asserts and parsing issues with grossly
  26129. malformed router caches. Fixes bug 2352; bugfix on Tor 0.2.1.27.
  26130. Found by doorss.
  26131. o Minor bugfixes (other), also included in 0.2.1.29:
  26132. - Fix a bug with handling misformed replies to reverse DNS lookup
  26133. requests in DNSPort. Bugfix on Tor 0.2.0.1-alpha. Related to a
  26134. bug reported by doorss.
  26135. - Fix compilation on mingw when a pthreads compatibility library
  26136. has been installed. (We don't want to use it, so we shouldn't
  26137. be including pthread.h.) Fixes bug 2313; bugfix on 0.1.0.1-rc.
  26138. - Fix a bug where we would declare that we had run out of virtual
  26139. addresses when the address space was only half-exhausted. Bugfix
  26140. on 0.1.2.1-alpha.
  26141. - Correctly handle the case where AutomapHostsOnResolve is set but
  26142. no virtual addresses are available. Fixes bug 2328; bugfix on
  26143. 0.1.2.1-alpha. Bug found by doorss.
  26144. - Correctly handle wrapping around when we run out of virtual
  26145. address space. Found by cypherpunks; bugfix on 0.2.0.5-alpha.
  26146. o Minor features, also included in 0.2.1.29:
  26147. - Update to the January 1 2011 Maxmind GeoLite Country database.
  26148. - Introduce output size checks on all of our decryption functions.
  26149. o Build changes, also included in 0.2.1.29:
  26150. - Tor does not build packages correctly with Automake 1.6 and earlier;
  26151. added a check to Makefile.am to make sure that we're building with
  26152. Automake 1.7 or later.
  26153. - The 0.2.1.28 tarball was missing src/common/OpenBSD_malloc_Linux.c
  26154. because we built it with a too-old version of automake. Thus that
  26155. release broke ./configure --enable-openbsd-malloc, which is popular
  26156. among really fast exit relays on Linux.
  26157. o Major bugfixes, new in 0.2.2.21-alpha:
  26158. - Prevent crash/heap corruption when the cbtnummodes consensus
  26159. parameter is set to 0 or large values. Fixes bug 2317; bugfix
  26160. on 0.2.2.14-alpha.
  26161. o Major features, new in 0.2.2.21-alpha:
  26162. - Introduce minimum/maximum values that clients will believe
  26163. from the consensus. Now we'll have a better chance to avoid crashes
  26164. or worse when a consensus param has a weird value.
  26165. o Minor features, new in 0.2.2.21-alpha:
  26166. - Make sure to disable DirPort if running as a bridge. DirPorts aren't
  26167. used on bridges, and it makes bridge scanning somewhat easier.
  26168. - If writing the state file to disk fails, wait up to an hour before
  26169. retrying again, rather than trying again each second. Fixes bug
  26170. 2346; bugfix on Tor 0.1.1.3-alpha.
  26171. - Make Libevent log messages get delivered to controllers later,
  26172. and not from inside the Libevent log handler. This prevents unsafe
  26173. reentrant Libevent calls while still letting the log messages
  26174. get through.
  26175. - Detect platforms that brokenly use a signed size_t, and refuse to
  26176. build there. Found and analyzed by doorss and rransom.
  26177. - Fix a bunch of compile warnings revealed by mingw with gcc 4.5.
  26178. Resolves bug 2314.
  26179. o Minor bugfixes, new in 0.2.2.21-alpha:
  26180. - Handle SOCKS messages longer than 128 bytes long correctly, rather
  26181. than waiting forever for them to finish. Fixes bug 2330; bugfix
  26182. on 0.2.0.16-alpha. Found by doorss.
  26183. - Add assertions to check for overflow in arguments to
  26184. base32_encode() and base32_decode(); fix a signed-unsigned
  26185. comparison there too. These bugs are not actually reachable in Tor,
  26186. but it's good to prevent future errors too. Found by doorss.
  26187. - Correctly detect failures to create DNS requests when using Libevent
  26188. versions before v2. (Before Libevent 2, we used our own evdns
  26189. implementation. Its return values for Libevent's evdns_resolve_*()
  26190. functions are not consistent with those from Libevent.) Fixes bug
  26191. 2363; bugfix on 0.2.2.6-alpha. Found by "lodger".
  26192. o Documentation, new in 0.2.2.21-alpha:
  26193. - Document the default socks host and port (127.0.0.1:9050) for
  26194. tor-resolve.
  26195. Changes in version 0.2.1.29 - 2011-01-15
  26196. Tor 0.2.1.29 continues our recent code security audit work. The main
  26197. fix resolves a remote heap overflow vulnerability that can allow remote
  26198. code execution. Other fixes address a variety of assert and crash bugs,
  26199. most of which we think are hard to exploit remotely.
  26200. o Major bugfixes (security):
  26201. - Fix a heap overflow bug where an adversary could cause heap
  26202. corruption. This bug probably allows remote code execution
  26203. attacks. Reported by "debuger". Fixes CVE-2011-0427. Bugfix on
  26204. 0.1.2.10-rc.
  26205. - Prevent a denial-of-service attack by disallowing any
  26206. zlib-compressed data whose compression factor is implausibly
  26207. high. Fixes part of bug 2324; reported by "doorss".
  26208. - Zero out a few more keys in memory before freeing them. Fixes
  26209. bug 2384 and part of bug 2385. These key instances found by
  26210. "cypherpunks", based on Andrew Case's report about being able
  26211. to find sensitive data in Tor's memory space if you have enough
  26212. permissions. Bugfix on 0.0.2pre9.
  26213. o Major bugfixes (crashes):
  26214. - Prevent calls to Libevent from inside Libevent log handlers.
  26215. This had potential to cause a nasty set of crashes, especially
  26216. if running Libevent with debug logging enabled, and running
  26217. Tor with a controller watching for low-severity log messages.
  26218. Bugfix on 0.1.0.2-rc. Fixes bug 2190.
  26219. - Add a check for SIZE_T_MAX to tor_realloc() to try to avoid
  26220. underflow errors there too. Fixes the other part of bug 2324.
  26221. - Fix a bug where we would assert if we ever had a
  26222. cached-descriptors.new file (or another file read directly into
  26223. memory) of exactly SIZE_T_CEILING bytes. Fixes bug 2326; bugfix
  26224. on 0.2.1.25. Found by doorss.
  26225. - Fix some potential asserts and parsing issues with grossly
  26226. malformed router caches. Fixes bug 2352; bugfix on Tor 0.2.1.27.
  26227. Found by doorss.
  26228. o Minor bugfixes (other):
  26229. - Fix a bug with handling misformed replies to reverse DNS lookup
  26230. requests in DNSPort. Bugfix on Tor 0.2.0.1-alpha. Related to a
  26231. bug reported by doorss.
  26232. - Fix compilation on mingw when a pthreads compatibility library
  26233. has been installed. (We don't want to use it, so we shouldn't
  26234. be including pthread.h.) Fixes bug 2313; bugfix on 0.1.0.1-rc.
  26235. - Fix a bug where we would declare that we had run out of virtual
  26236. addresses when the address space was only half-exhausted. Bugfix
  26237. on 0.1.2.1-alpha.
  26238. - Correctly handle the case where AutomapHostsOnResolve is set but
  26239. no virtual addresses are available. Fixes bug 2328; bugfix on
  26240. 0.1.2.1-alpha. Bug found by doorss.
  26241. - Correctly handle wrapping around to when we run out of virtual
  26242. address space. Found by cypherpunks, bugfix on 0.2.0.5-alpha.
  26243. - The 0.2.1.28 tarball was missing src/common/OpenBSD_malloc_Linux.c
  26244. because we built it with a too-old version of automake. Thus that
  26245. release broke ./configure --enable-openbsd-malloc, which is popular
  26246. among really fast exit relays on Linux.
  26247. o Minor features:
  26248. - Update to the January 1 2011 Maxmind GeoLite Country database.
  26249. - Introduce output size checks on all of our decryption functions.
  26250. o Build changes:
  26251. - Tor does not build packages correctly with Automake 1.6 and earlier;
  26252. added a check to Makefile.am to make sure that we're building with
  26253. Automake 1.7 or later.
  26254. Changes in version 0.2.2.20-alpha - 2010-12-17
  26255. Tor 0.2.2.20-alpha does some code cleanup to reduce the risk of remotely
  26256. exploitable bugs. We also fix a variety of other significant bugs,
  26257. change the IP address for one of our directory authorities, and update
  26258. the minimum version that Tor relays must run to join the network.
  26259. o Major bugfixes:
  26260. - Fix a remotely exploitable bug that could be used to crash instances
  26261. of Tor remotely by overflowing on the heap. Remote-code execution
  26262. hasn't been confirmed, but can't be ruled out. Everyone should
  26263. upgrade. Bugfix on the 0.1.1 series and later.
  26264. - Fix a bug that could break accounting on 64-bit systems with large
  26265. time_t values, making them hibernate for impossibly long intervals.
  26266. Fixes bug 2146. Bugfix on 0.0.9pre6; fix by boboper.
  26267. - Fix a logic error in directory_fetches_from_authorities() that
  26268. would cause all _non_-exits refusing single-hop-like circuits
  26269. to fetch from authorities, when we wanted to have _exits_ fetch
  26270. from authorities. Fixes more of 2097. Bugfix on 0.2.2.16-alpha;
  26271. fix by boboper.
  26272. - Fix a stream fairness bug that would cause newer streams on a given
  26273. circuit to get preference when reading bytes from the origin or
  26274. destination. Fixes bug 2210. Fix by Mashael AlSabah. This bug was
  26275. introduced before the first Tor release, in svn revision r152.
  26276. o Directory authority changes:
  26277. - Change IP address and ports for gabelmoo (v3 directory authority).
  26278. o Minor bugfixes:
  26279. - Avoid crashes when AccountingMax is set on clients. Fixes bug 2235.
  26280. Bugfix on 0.2.2.18-alpha. Diagnosed by boboper.
  26281. - Fix an off-by-one error in calculating some controller command
  26282. argument lengths. Fortunately, this mistake is harmless since
  26283. the controller code does redundant NUL termination too. Found by
  26284. boboper. Bugfix on 0.1.1.1-alpha.
  26285. - Do not dereference NULL if a bridge fails to build its
  26286. extra-info descriptor. Found by an anonymous commenter on
  26287. Trac. Bugfix on 0.2.2.19-alpha.
  26288. o Minor features:
  26289. - Update to the December 1 2010 Maxmind GeoLite Country database.
  26290. - Directory authorities now reject relays running any versions of
  26291. Tor between 0.2.1.3-alpha and 0.2.1.18 inclusive; they have
  26292. known bugs that keep RELAY_EARLY cells from working on rendezvous
  26293. circuits. Followup to fix for bug 2081.
  26294. - Directory authorities now reject relays running any version of Tor
  26295. older than 0.2.0.26-rc. That version is the earliest that fetches
  26296. current directory information correctly. Fixes bug 2156.
  26297. - Report only the top 10 ports in exit-port stats in order not to
  26298. exceed the maximum extra-info descriptor length of 50 KB. Implements
  26299. task 2196.
  26300. Changes in version 0.2.1.28 - 2010-12-17
  26301. Tor 0.2.1.28 does some code cleanup to reduce the risk of remotely
  26302. exploitable bugs. We also took this opportunity to change the IP address
  26303. for one of our directory authorities, and to update the geoip database
  26304. we ship.
  26305. o Major bugfixes:
  26306. - Fix a remotely exploitable bug that could be used to crash instances
  26307. of Tor remotely by overflowing on the heap. Remote-code execution
  26308. hasn't been confirmed, but can't be ruled out. Everyone should
  26309. upgrade. Bugfix on the 0.1.1 series and later.
  26310. o Directory authority changes:
  26311. - Change IP address and ports for gabelmoo (v3 directory authority).
  26312. o Minor features:
  26313. - Update to the December 1 2010 Maxmind GeoLite Country database.
  26314. Changes in version 0.2.1.27 - 2010-11-23
  26315. Yet another OpenSSL security patch broke its compatibility with Tor:
  26316. Tor 0.2.1.27 makes relays work with openssl 0.9.8p and 1.0.0.b. We
  26317. also took this opportunity to fix several crash bugs, integrate a new
  26318. directory authority, and update the bundled GeoIP database.
  26319. o Major bugfixes:
  26320. - Resolve an incompatibility with OpenSSL 0.9.8p and OpenSSL 1.0.0b:
  26321. No longer set the tlsext_host_name extension on server SSL objects;
  26322. but continue to set it on client SSL objects. Our goal in setting
  26323. it was to imitate a browser, not a vhosting server. Fixes bug 2204;
  26324. bugfix on 0.2.1.1-alpha.
  26325. - Do not log messages to the controller while shrinking buffer
  26326. freelists. Doing so would sometimes make the controller connection
  26327. try to allocate a buffer chunk, which would mess up the internals
  26328. of the freelist and cause an assertion failure. Fixes bug 1125;
  26329. fixed by Robert Ransom. Bugfix on 0.2.0.16-alpha.
  26330. - Learn our external IP address when we're a relay or bridge, even if
  26331. we set PublishServerDescriptor to 0. Bugfix on 0.2.0.3-alpha,
  26332. where we introduced bridge relays that don't need to publish to
  26333. be useful. Fixes bug 2050.
  26334. - Do even more to reject (and not just ignore) annotations on
  26335. router descriptors received anywhere but from the cache. Previously
  26336. we would ignore such annotations at first, but cache them to disk
  26337. anyway. Bugfix on 0.2.0.8-alpha. Found by piebeer.
  26338. - When you're using bridges and your network goes away and your
  26339. bridges get marked as down, recover when you attempt a new socks
  26340. connection (if the network is back), rather than waiting up to an
  26341. hour to try fetching new descriptors for your bridges. Bugfix on
  26342. 0.2.0.3-alpha; fixes bug 1981.
  26343. o Major features:
  26344. - Move to the November 2010 Maxmind GeoLite country db (rather
  26345. than the June 2009 ip-to-country GeoIP db) for our statistics that
  26346. count how many users relays are seeing from each country. Now we'll
  26347. have more accurate data, especially for many African countries.
  26348. o New directory authorities:
  26349. - Set up maatuska (run by Linus Nordberg) as the eighth v3 directory
  26350. authority.
  26351. o Minor bugfixes:
  26352. - Fix an assertion failure that could occur in directory caches or
  26353. bridge users when using a very short voting interval on a testing
  26354. network. Diagnosed by Robert Hogan. Fixes bug 1141; bugfix on
  26355. 0.2.0.8-alpha.
  26356. - Enforce multiplicity rules when parsing annotations. Bugfix on
  26357. 0.2.0.8-alpha. Found by piebeer.
  26358. - Allow handshaking OR connections to take a full KeepalivePeriod
  26359. seconds to handshake. Previously, we would close them after
  26360. IDLE_OR_CONN_TIMEOUT (180) seconds, the same timeout as if they
  26361. were open. Bugfix on 0.2.1.26; fixes bug 1840. Thanks to mingw-san
  26362. for analysis help.
  26363. - When building with --enable-gcc-warnings on OpenBSD, disable
  26364. warnings in system headers. This makes --enable-gcc-warnings
  26365. pass on OpenBSD 4.8.
  26366. o Minor features:
  26367. - Exit nodes didn't recognize EHOSTUNREACH as a plausible error code,
  26368. and so sent back END_STREAM_REASON_MISC. Clients now recognize a new
  26369. stream ending reason for this case: END_STREAM_REASON_NOROUTE.
  26370. Servers can start sending this code when enough clients recognize
  26371. it. Bugfix on 0.1.0.1-rc; fixes part of bug 1793.
  26372. - Build correctly on mingw with more recent versions of OpenSSL 0.9.8.
  26373. Patch from mingw-san.
  26374. o Removed files:
  26375. - Remove the old debian/ directory from the main Tor distribution.
  26376. The official Tor-for-debian git repository lives at the URL
  26377. https://git.torproject.org/debian/tor.git
  26378. - Stop shipping the old doc/website/ directory in the tarball. We
  26379. changed the website format in late 2010, and what we shipped in
  26380. 0.2.1.26 really wasn't that useful anyway.
  26381. Changes in version 0.2.2.19-alpha - 2010-11-22
  26382. Yet another OpenSSL security patch broke its compatibility with Tor:
  26383. Tor 0.2.2.19-alpha makes relays work with OpenSSL 0.9.8p and 1.0.0.b.
  26384. o Major bugfixes:
  26385. - Resolve an incompatibility with OpenSSL 0.9.8p and OpenSSL 1.0.0b:
  26386. No longer set the tlsext_host_name extension on server SSL objects;
  26387. but continue to set it on client SSL objects. Our goal in setting
  26388. it was to imitate a browser, not a vhosting server. Fixes bug 2204;
  26389. bugfix on 0.2.1.1-alpha.
  26390. o Minor bugfixes:
  26391. - Try harder not to exceed the maximum length of 50 KB when writing
  26392. statistics to extra-info descriptors. This bug was triggered by very
  26393. fast relays reporting exit-port, entry, and dirreq statistics.
  26394. Reported by Olaf Selke. Bugfix on 0.2.2.1-alpha. Fixes bug 2183.
  26395. - Publish a router descriptor even if generating an extra-info
  26396. descriptor fails. Previously we would not publish a router
  26397. descriptor without an extra-info descriptor; this can cause fast
  26398. exit relays collecting exit-port statistics to drop from the
  26399. consensus. Bugfix on 0.1.2.9-rc; fixes bug 2195.
  26400. Changes in version 0.2.2.18-alpha - 2010-11-16
  26401. Tor 0.2.2.18-alpha fixes several crash bugs that have been nagging
  26402. us lately, makes unpublished bridge relays able to detect their IP
  26403. address, and fixes a wide variety of other bugs to get us much closer
  26404. to a stable release.
  26405. o Major bugfixes:
  26406. - Do even more to reject (and not just ignore) annotations on
  26407. router descriptors received anywhere but from the cache. Previously
  26408. we would ignore such annotations at first, but cache them to disk
  26409. anyway. Bugfix on 0.2.0.8-alpha. Found by piebeer.
  26410. - Do not log messages to the controller while shrinking buffer
  26411. freelists. Doing so would sometimes make the controller connection
  26412. try to allocate a buffer chunk, which would mess up the internals
  26413. of the freelist and cause an assertion failure. Fixes bug 1125;
  26414. fixed by Robert Ransom. Bugfix on 0.2.0.16-alpha.
  26415. - Learn our external IP address when we're a relay or bridge, even if
  26416. we set PublishServerDescriptor to 0. Bugfix on 0.2.0.3-alpha,
  26417. where we introduced bridge relays that don't need to publish to
  26418. be useful. Fixes bug 2050.
  26419. - Maintain separate TLS contexts and certificates for incoming and
  26420. outgoing connections in bridge relays. Previously we would use the
  26421. same TLS contexts and certs for incoming and outgoing connections.
  26422. Bugfix on 0.2.0.3-alpha; addresses bug 988.
  26423. - Maintain separate identity keys for incoming and outgoing TLS
  26424. contexts in bridge relays. Previously we would use the same
  26425. identity keys for incoming and outgoing TLS contexts. Bugfix on
  26426. 0.2.0.3-alpha; addresses the other half of bug 988.
  26427. - Avoid an assertion failure when we as an authority receive a
  26428. duplicate upload of a router descriptor that we already have,
  26429. but which we previously considered an obsolete descriptor.
  26430. Fixes another case of bug 1776. Bugfix on 0.2.2.16-alpha.
  26431. - Avoid a crash bug triggered by looking at a dangling pointer while
  26432. setting the network status consensus. Found by Robert Ransom.
  26433. Bugfix on 0.2.2.17-alpha. Fixes bug 2097.
  26434. - Fix a logic error where servers that _didn't_ act as exits would
  26435. try to keep their server lists more aggressively up to date than
  26436. exits, when it was supposed to be the other way around. Bugfix
  26437. on 0.2.2.17-alpha.
  26438. o Minor bugfixes (on Tor 0.2.1.x and earlier):
  26439. - When we're trying to guess whether we know our IP address as
  26440. a relay, we would log various ways that we failed to guess
  26441. our address, but never log that we ended up guessing it
  26442. successfully. Now add a log line to help confused and anxious
  26443. relay operators. Bugfix on 0.1.2.1-alpha; fixes bug 1534.
  26444. - Bring the logic that gathers routerinfos and assesses the
  26445. acceptability of circuits into line. This prevents a Tor OP from
  26446. getting locked in a cycle of choosing its local OR as an exit for a
  26447. path (due to a .exit request) and then rejecting the circuit because
  26448. its OR is not listed yet. It also prevents Tor clients from using an
  26449. OR running in the same instance as an exit (due to a .exit request)
  26450. if the OR does not meet the same requirements expected of an OR
  26451. running elsewhere. Fixes bug 1859; bugfix on 0.1.0.1-rc.
  26452. - Correctly describe errors that occur when generating a TLS object.
  26453. Previously we would attribute them to a failure while generating a
  26454. TLS context. Patch by Robert Ransom. Bugfix on 0.1.0.4-rc; fixes
  26455. bug 1994.
  26456. - Enforce multiplicity rules when parsing annotations. Bugfix on
  26457. 0.2.0.8-alpha. Found by piebeer.
  26458. - Fix warnings that newer versions of autoconf produced during
  26459. ./autogen.sh. These warnings appear to be harmless in our case,
  26460. but they were extremely verbose. Fixes bug 2020.
  26461. o Minor bugfixes (on Tor 0.2.2.x):
  26462. - Enable protection of small arrays whenever we build with gcc
  26463. hardening features, not only when also building with warnings
  26464. enabled. Fixes bug 2031; bugfix on 0.2.2.14-alpha. Reported by keb.
  26465. o Minor features:
  26466. - Make hidden services work better in private Tor networks by not
  26467. requiring any uptime to join the hidden service descriptor
  26468. DHT. Implements ticket 2088.
  26469. - Rate-limit the "your application is giving Tor only an IP address"
  26470. warning. Addresses bug 2000; bugfix on 0.0.8pre2.
  26471. - When AllowSingleHopExits is set, print a warning to explain to the
  26472. relay operator why most clients are avoiding her relay.
  26473. - Update to the November 1 2010 Maxmind GeoLite Country database.
  26474. o Code simplifications and refactoring:
  26475. - When we fixed bug 1038 we had to put in a restriction not to send
  26476. RELAY_EARLY cells on rend circuits. This was necessary as long
  26477. as relays using Tor 0.2.1.3-alpha through 0.2.1.18-alpha were
  26478. active. Now remove this obsolete check. Resolves bug 2081.
  26479. - Some options used different conventions for uppercasing of acronyms
  26480. when comparing manpage and source. Fix those in favor of the
  26481. manpage, as it makes sense to capitalize acronyms.
  26482. - Remove the torrc.complete file. It hasn't been kept up to date
  26483. and users will have better luck checking out the manpage.
  26484. - Remove the obsolete "NoPublish" option; it has been flagged
  26485. as obsolete and has produced a warning since 0.1.1.18-rc.
  26486. - Remove everything related to building the expert bundle for OS X.
  26487. It has confused many users, doesn't work right on OS X 10.6,
  26488. and is hard to get rid of once installed. Resolves bug 1274.
  26489. Changes in version 0.2.2.17-alpha - 2010-09-30
  26490. Tor 0.2.2.17-alpha introduces a feature to make it harder for clients
  26491. to use one-hop circuits (which can put the exit relays at higher risk,
  26492. plus unbalance the network); fixes a big bug in bandwidth accounting
  26493. for relays that want to limit their monthly bandwidth use; fixes a
  26494. big pile of bugs in how clients tolerate temporary network failure;
  26495. and makes our adaptive circuit build timeout feature (which improves
  26496. client performance if your network is fast while not breaking things
  26497. if your network is slow) better handle bad networks.
  26498. o Major features:
  26499. - Exit relays now try harder to block exit attempts from unknown
  26500. relays, to make it harder for people to use them as one-hop proxies
  26501. a la tortunnel. Controlled by the refuseunknownexits consensus
  26502. parameter (currently enabled), or you can override it on your
  26503. relay with the RefuseUnknownExits torrc option. Resolves bug 1751.
  26504. o Major bugfixes (0.2.1.x and earlier):
  26505. - Fix a bug in bandwidth accounting that could make us use twice
  26506. the intended bandwidth when our interval start changes due to
  26507. daylight saving time. Now we tolerate skew in stored vs computed
  26508. interval starts: if the start of the period changes by no more than
  26509. 50% of the period's duration, we remember bytes that we transferred
  26510. in the old period. Fixes bug 1511; bugfix on 0.0.9pre5.
  26511. - Always search the Windows system directory for system DLLs, and
  26512. nowhere else. Bugfix on 0.1.1.23; fixes bug 1954.
  26513. - When you're using bridges and your network goes away and your
  26514. bridges get marked as down, recover when you attempt a new socks
  26515. connection (if the network is back), rather than waiting up to an
  26516. hour to try fetching new descriptors for your bridges. Bugfix on
  26517. 0.2.0.3-alpha; fixes bug 1981.
  26518. o Major bugfixes (on 0.2.2.x):
  26519. - Fix compilation on Windows. Bugfix on 0.2.2.16-alpha; related to
  26520. bug 1797.
  26521. - Fix a segfault that could happen when operating a bridge relay with
  26522. no GeoIP database set. Fixes bug 1964; bugfix on 0.2.2.15-alpha.
  26523. - The consensus bandwidth-weights (used by clients to choose fast
  26524. relays) entered an unexpected edge case in September where
  26525. Exits were much scarcer than Guards, resulting in bad weight
  26526. recommendations. Now we compute them using new constraints that
  26527. should succeed in all cases. Also alter directory authorities to
  26528. not include the bandwidth-weights line if they fail to produce
  26529. valid values. Fixes bug 1952; bugfix on 0.2.2.10-alpha.
  26530. - When weighting bridges during path selection, we used to trust
  26531. the bandwidths they provided in their descriptor, only capping them
  26532. at 10MB/s. This turned out to be problematic for two reasons:
  26533. Bridges could claim to handle a lot more traffic then they
  26534. actually would, thus making more clients pick them and have a
  26535. pretty effective DoS attack. The other issue is that new bridges
  26536. that might not have a good estimate for their bw capacity yet
  26537. would not get used at all unless no other bridges are available
  26538. to a client. Fixes bug 1912; bugfix on 0.2.2.7-alpha.
  26539. o Major bugfixes (on the circuit build timeout feature, 0.2.2.x):
  26540. - Ignore cannibalized circuits when recording circuit build times.
  26541. This should provide for a minor performance improvement for hidden
  26542. service users using 0.2.2.14-alpha, and should remove two spurious
  26543. notice log messages. Bugfix on 0.2.2.14-alpha; fixes bug 1740.
  26544. - Simplify the logic that causes us to decide if the network is
  26545. unavailable for purposes of recording circuit build times. If we
  26546. receive no cells whatsoever for the entire duration of a circuit's
  26547. full measured lifetime, the network is probably down. Also ignore
  26548. one-hop directory fetching circuit timeouts when calculating our
  26549. circuit build times. These changes should hopefully reduce the
  26550. cases where we see ridiculous circuit build timeouts for people
  26551. with spotty wireless connections. Fixes part of bug 1772; bugfix
  26552. on 0.2.2.2-alpha.
  26553. - Prevent the circuit build timeout from becoming larger than
  26554. the maximum build time we have ever seen. Also, prevent the time
  26555. period for measurement circuits from becoming larger than twice that
  26556. value. Fixes the other part of bug 1772; bugfix on 0.2.2.2-alpha.
  26557. o Minor features:
  26558. - When we run out of directory information such that we can't build
  26559. circuits, but then get enough that we can build circuits, log when
  26560. we actually construct a circuit, so the user has a better chance of
  26561. knowing what's going on. Fixes bug 1362.
  26562. - Be more generous with how much bandwidth we'd use up (with
  26563. accounting enabled) before entering "soft hibernation". Previously,
  26564. we'd refuse new connections and circuits once we'd used up 95% of
  26565. our allotment. Now, we use up 95% of our allotment, AND make sure
  26566. that we have no more than 500MB (or 3 hours of expected traffic,
  26567. whichever is lower) remaining before we enter soft hibernation.
  26568. - If we've configured EntryNodes and our network goes away and/or all
  26569. our entrynodes get marked down, optimistically retry them all when
  26570. a new socks application request appears. Fixes bug 1882.
  26571. - Add some more defensive programming for architectures that can't
  26572. handle unaligned integer accesses. We don't know of any actual bugs
  26573. right now, but that's the best time to fix them. Fixes bug 1943.
  26574. - Support line continuations in the torrc config file. If a line
  26575. ends with a single backslash character, the newline is ignored, and
  26576. the configuration value is treated as continuing on the next line.
  26577. Resolves bug 1929.
  26578. o Minor bugfixes (on 0.2.1.x and earlier):
  26579. - For bandwidth accounting, calculate our expected bandwidth rate
  26580. based on the time during which we were active and not in
  26581. soft-hibernation during the last interval. Previously, we were
  26582. also considering the time spent in soft-hibernation. If this
  26583. was a long time, we would wind up underestimating our bandwidth
  26584. by a lot, and skewing our wakeup time towards the start of the
  26585. accounting interval. Fixes bug 1789. Bugfix on 0.0.9pre5.
  26586. o Minor bugfixes (on 0.2.2.x):
  26587. - Resume generating CIRC FAILED REASON=TIMEOUT control port messages,
  26588. which were disabled by the circuit build timeout changes in
  26589. 0.2.2.14-alpha. Bugfix on 0.2.2.14-alpha; fixes bug 1739.
  26590. - Make sure we don't warn about missing bandwidth weights when
  26591. choosing bridges or other relays not in the consensus. Bugfix on
  26592. 0.2.2.10-alpha; fixes bug 1805.
  26593. - In our logs, do not double-report signatures from unrecognized
  26594. authorities both as "from unknown authority" and "not
  26595. present". Fixes bug 1956, bugfix on 0.2.2.16-alpha.
  26596. Changes in version 0.2.2.16-alpha - 2010-09-17
  26597. Tor 0.2.2.16-alpha fixes a variety of old stream fairness bugs (most
  26598. evident at exit relays), and also continues to resolve all the little
  26599. bugs that have been filling up trac lately.
  26600. o Major bugfixes (stream-level fairness):
  26601. - When receiving a circuit-level SENDME for a blocked circuit, try
  26602. to package cells fairly from all the streams that had previously
  26603. been blocked on that circuit. Previously, we had started with the
  26604. oldest stream, and allowed each stream to potentially exhaust
  26605. the circuit's package window. This gave older streams on any
  26606. given circuit priority over newer ones. Fixes bug 1937. Detected
  26607. originally by Camilo Viecco. This bug was introduced before the
  26608. first Tor release, in svn commit r152: it is the new winner of
  26609. the longest-lived bug prize.
  26610. - When the exit relay got a circuit-level sendme cell, it started
  26611. reading on the exit streams, even if had 500 cells queued in the
  26612. circuit queue already, so the circuit queue just grew and grew in
  26613. some cases. We fix this by not re-enabling reading on receipt of a
  26614. sendme cell when the cell queue is blocked. Fixes bug 1653. Bugfix
  26615. on 0.2.0.1-alpha. Detected by Mashael AlSabah. Original patch by
  26616. "yetonetime".
  26617. - Newly created streams were allowed to read cells onto circuits,
  26618. even if the circuit's cell queue was blocked and waiting to drain.
  26619. This created potential unfairness, as older streams would be
  26620. blocked, but newer streams would gladly fill the queue completely.
  26621. We add code to detect this situation and prevent any stream from
  26622. getting more than one free cell. Bugfix on 0.2.0.1-alpha. Partially
  26623. fixes bug 1298.
  26624. o Minor features:
  26625. - Update to the September 1 2010 Maxmind GeoLite Country database.
  26626. - Warn when CookieAuthFileGroupReadable is set but CookieAuthFile is
  26627. not. This would lead to a cookie that is still not group readable.
  26628. Closes bug 1843. Suggested by katmagic.
  26629. - When logging a rate-limited warning, we now mention how many messages
  26630. got suppressed since the last warning.
  26631. - Add new "perconnbwrate" and "perconnbwburst" consensus params to
  26632. do individual connection-level rate limiting of clients. The torrc
  26633. config options with the same names trump the consensus params, if
  26634. both are present. Replaces the old "bwconnrate" and "bwconnburst"
  26635. consensus params which were broken from 0.2.2.7-alpha through
  26636. 0.2.2.14-alpha. Closes bug 1947.
  26637. - When a router changes IP address or port, authorities now launch
  26638. a new reachability test for it. Implements ticket 1899.
  26639. - Make the formerly ugly "2 unknown, 7 missing key, 0 good, 0 bad,
  26640. 2 no signature, 4 required" messages about consensus signatures
  26641. easier to read, and make sure they get logged at the same severity
  26642. as the messages explaining which keys are which. Fixes bug 1290.
  26643. - Don't warn when we have a consensus that we can't verify because
  26644. of missing certificates, unless those certificates are ones
  26645. that we have been trying and failing to download. Fixes bug 1145.
  26646. - If you configure your bridge with a known identity fingerprint,
  26647. and the bridge authority is unreachable (as it is in at least
  26648. one country now), fall back to directly requesting the descriptor
  26649. from the bridge. Finishes the feature started in 0.2.0.10-alpha;
  26650. closes bug 1138.
  26651. - When building with --enable-gcc-warnings on OpenBSD, disable
  26652. warnings in system headers. This makes --enable-gcc-warnings
  26653. pass on OpenBSD 4.8.
  26654. o Minor bugfixes (on 0.2.1.x and earlier):
  26655. - Authorities will now attempt to download consensuses if their
  26656. own efforts to make a live consensus have failed. This change
  26657. means authorities that restart will fetch a valid consensus, and
  26658. it means authorities that didn't agree with the current consensus
  26659. will still fetch and serve it if it has enough signatures. Bugfix
  26660. on 0.2.0.9-alpha; fixes bug 1300.
  26661. - Ensure DNS requests launched by "RESOLVE" commands from the
  26662. controller respect the __LeaveStreamsUnattached setconf options. The
  26663. same goes for requests launched via DNSPort or transparent
  26664. proxying. Bugfix on 0.2.0.1-alpha; fixes bug 1525.
  26665. - Allow handshaking OR connections to take a full KeepalivePeriod
  26666. seconds to handshake. Previously, we would close them after
  26667. IDLE_OR_CONN_TIMEOUT (180) seconds, the same timeout as if they
  26668. were open. Bugfix on 0.2.1.26; fixes bug 1840. Thanks to mingw-san
  26669. for analysis help.
  26670. - Rate-limit "Failed to hand off onionskin" warnings.
  26671. - Never relay a cell for a circuit we have already destroyed.
  26672. Between marking a circuit as closeable and finally closing it,
  26673. it may have been possible for a few queued cells to get relayed,
  26674. even though they would have been immediately dropped by the next
  26675. OR in the circuit. Fixes bug 1184; bugfix on 0.2.0.1-alpha.
  26676. - Never queue a cell for a circuit that's already been marked
  26677. for close.
  26678. - Never vote for a server as "Running" if we have a descriptor for
  26679. it claiming to be hibernating, and that descriptor was published
  26680. more recently than our last contact with the server. Bugfix on
  26681. 0.2.0.3-alpha; fixes bug 911.
  26682. - Squash a compile warning on OpenBSD. Reported by Tas; fixes
  26683. bug 1848.
  26684. o Minor bugfixes (on 0.2.2.x):
  26685. - Fix a regression introduced in 0.2.2.7-alpha that marked relays
  26686. down if a directory fetch fails and you've configured either
  26687. bridges or EntryNodes. The intent was to mark the relay as down
  26688. _unless_ you're using bridges or EntryNodes, since if you are
  26689. then you could quickly run out of entry points.
  26690. - Fix the Windows directory-listing code. A bug introduced in
  26691. 0.2.2.14-alpha could make Windows directory servers forget to load
  26692. some of their cached v2 networkstatus files.
  26693. - Really allow clients to use relays as bridges. Fixes bug 1776;
  26694. bugfix on 0.2.2.15-alpha.
  26695. - Demote a warn to info that happens when the CellStatistics option
  26696. was just enabled. Bugfix on 0.2.2.15-alpha; fixes bug 1921.
  26697. Reported by Moritz Bartl.
  26698. - On Windows, build correctly either with or without Unicode support.
  26699. This is necessary so that Tor can support fringe platforms like
  26700. Windows 98 (which has no Unicode), or Windows CE (which has no
  26701. non-Unicode). Bugfix on 0.2.2.14-alpha; fixes bug 1797.
  26702. o Testing
  26703. - Add a unit test for cross-platform directory-listing code.
  26704. Changes in version 0.2.2.15-alpha - 2010-08-18
  26705. Tor 0.2.2.15-alpha fixes a big bug in hidden service availability,
  26706. fixes a variety of other bugs that were preventing performance
  26707. experiments from moving forward, fixes several bothersome memory leaks,
  26708. and generally closes a lot of smaller bugs that have been filling up
  26709. trac lately.
  26710. o Major bugfixes:
  26711. - Stop assigning the HSDir flag to relays that disable their
  26712. DirPort (and thus will refuse to answer directory requests). This
  26713. fix should dramatically improve the reachability of hidden services:
  26714. hidden services and hidden service clients pick six HSDir relays
  26715. to store and retrieve the hidden service descriptor, and currently
  26716. about half of the HSDir relays will refuse to work. Bugfix on
  26717. 0.2.0.10-alpha; fixes part of bug 1693.
  26718. - The PerConnBWRate and Burst config options, along with the
  26719. bwconnrate and bwconnburst consensus params, initialized each conn's
  26720. token bucket values only when the connection is established. Now we
  26721. update them if the config options change, and update them every time
  26722. we get a new consensus. Otherwise we can encounter an ugly edge
  26723. case where we initialize an OR conn to client-level bandwidth,
  26724. but then later the relay joins the consensus and we leave it
  26725. throttled. Bugfix on 0.2.2.7-alpha; fixes bug 1830.
  26726. - Fix a regression that caused Tor to rebind its ports if it receives
  26727. SIGHUP while hibernating. Bugfix in 0.1.1.6-alpha; closes bug 919.
  26728. o Major features:
  26729. - Lower the maximum weighted-fractional-uptime cutoff to 98%. This
  26730. should give us approximately 40-50% more Guard-flagged nodes,
  26731. improving the anonymity the Tor network can provide and also
  26732. decreasing the dropoff in throughput that relays experience when
  26733. they first get the Guard flag.
  26734. - Allow enabling or disabling the *Statistics config options while
  26735. Tor is running.
  26736. o Minor features:
  26737. - Update to the August 1 2010 Maxmind GeoLite Country database.
  26738. - Have the controller interface give a more useful message than
  26739. "Internal Error" in response to failed GETINFO requests.
  26740. - Warn when the same option is provided more than once in a torrc
  26741. file, on the command line, or in a single SETCONF statement, and
  26742. the option is one that only accepts a single line. Closes bug 1384.
  26743. - Build correctly on mingw with more recent versions of OpenSSL 0.9.8.
  26744. Patch from mingw-san.
  26745. - Add support for the country code "{??}" in torrc options like
  26746. ExcludeNodes, to indicate all routers of unknown country. Closes
  26747. bug 1094.
  26748. - Relays report the number of bytes spent on answering directory
  26749. requests in extra-info descriptors similar to {read,write}-history.
  26750. Implements enhancement 1790.
  26751. o Minor bugfixes (on 0.2.1.x and earlier):
  26752. - Complain if PublishServerDescriptor is given multiple arguments that
  26753. include 0 or 1. This configuration will be rejected in the future.
  26754. Bugfix on 0.2.0.1-alpha; closes bug 1107.
  26755. - Disallow BridgeRelay 1 and ORPort 0 at once in the configuration.
  26756. Bugfix on 0.2.0.13-alpha; closes bug 928.
  26757. - Change "Application request when we're believed to be offline."
  26758. notice to "Application request when we haven't used client
  26759. functionality lately.", to clarify that it's not an error. Bugfix
  26760. on 0.0.9.3; fixes bug 1222.
  26761. - Fix a bug in the controller interface where "GETINFO ns/asdaskljkl"
  26762. would return "551 Internal error" rather than "552 Unrecognized key
  26763. ns/asdaskljkl". Bugfix on 0.1.2.3-alpha.
  26764. - Users can't configure a regular relay to be their bridge. It didn't
  26765. work because when Tor fetched the bridge descriptor, it found
  26766. that it already had it, and didn't realize that the purpose of the
  26767. descriptor had changed. Now we replace routers with a purpose other
  26768. than bridge with bridge descriptors when fetching them. Bugfix on
  26769. 0.1.1.9-alpha. Bug 1776 not yet fixed because now we immediately
  26770. refetch the descriptor with router purpose 'general', disabling
  26771. it as a bridge.
  26772. - Fix a rare bug in rend_fn unit tests: we would fail a test when
  26773. a randomly generated port is 0. Diagnosed by Matt Edman. Bugfix
  26774. on 0.2.0.10-alpha; fixes bug 1808.
  26775. - Exit nodes didn't recognize EHOSTUNREACH as a plausible error code,
  26776. and so sent back END_STREAM_REASON_MISC. Clients now recognize a new
  26777. stream ending reason for this case: END_STREAM_REASON_NOROUTE.
  26778. Servers can start sending this code when enough clients recognize
  26779. it. Also update the spec to reflect this new reason. Bugfix on
  26780. 0.1.0.1-rc; fixes part of bug 1793.
  26781. - Delay geoip stats collection by bridges for 6 hours, not 2 hours,
  26782. when we switch from being a public relay to a bridge. Otherwise
  26783. there will still be clients that see the relay in their consensus,
  26784. and the stats will end up wrong. Bugfix on 0.2.1.15-rc; fixes bug
  26785. 932 even more.
  26786. - Instead of giving an assertion failure on an internal mismatch
  26787. on estimated freelist size, just log a BUG warning and try later.
  26788. Mitigates but does not fix bug 1125.
  26789. - Fix an assertion failure that could occur in caches or bridge users
  26790. when using a very short voting interval on a testing network.
  26791. Diagnosed by Robert Hogan. Fixes bug 1141; bugfix on 0.2.0.8-alpha.
  26792. o Minor bugfixes (on 0.2.2.x):
  26793. - Alter directory authorities to always consider Exit-flagged nodes
  26794. as potential Guard nodes in their votes. The actual decision to
  26795. use Exits as Guards is done in the consensus bandwidth weights.
  26796. Fixes bug 1294; bugfix on 0.2.2.10-alpha.
  26797. - When the controller is reporting the purpose of circuits that
  26798. didn't finish building before the circuit build timeout, it was
  26799. printing UNKNOWN_13. Now print EXPIRED. Bugfix on 0.2.2.14-alpha.
  26800. - Our libevent version parsing code couldn't handle versions like
  26801. 1.4.14b-stable and incorrectly warned the user about using an
  26802. old and broken version of libevent. Treat 1.4.14b-stable like
  26803. 1.4.14-stable when parsing the version. Fixes bug 1731; bugfix
  26804. on 0.2.2.1-alpha.
  26805. - Don't use substitution references like $(VAR:MOD) when
  26806. $(asciidoc_files) is empty -- make(1) on NetBSD transforms
  26807. '$(:x)' to 'x' rather than the empty string. This bites us in
  26808. doc/ when configured with --disable-asciidoc. Bugfix on
  26809. 0.2.2.9-alpha; fixes bug 1773.
  26810. - Remove a spurious hidden service server-side log notice about
  26811. "Ancient non-dirty circuits". Bugfix on 0.2.2.14-alpha; fixes
  26812. bug 1741.
  26813. - Fix compilation with --with-dmalloc set. Bugfix on 0.2.2.6-alpha;
  26814. fixes bug 1832.
  26815. - Correctly report written bytes on linked connections. Found while
  26816. implementing 1790. Bugfix on 0.2.2.4-alpha.
  26817. - Fix three memory leaks: one in circuit_build_times_parse_state(),
  26818. one in dirvote_add_signatures_to_pending_consensus(), and one every
  26819. time we parse a v3 network consensus. Bugfixes on 0.2.2.14-alpha,
  26820. 0.2.2.6-alpha, and 0.2.2.10-alpha respectively; fixes bug 1831.
  26821. o Code simplifications and refactoring:
  26822. - Take a first step towards making or.h smaller by splitting out
  26823. function definitions for all source files in src/or/. Leave
  26824. structures and defines in or.h for now.
  26825. - Remove a bunch of unused function declarations as well as a block of
  26826. #if 0'd code from the unit tests. Closes bug 1824.
  26827. - New unit tests for exit-port history statistics; refactored exit
  26828. statistics code to be more easily tested.
  26829. - Remove the old debian/ directory from the main Tor distribution.
  26830. The official Tor-for-debian git repository lives at the URL
  26831. https://git.torproject.org/debian/tor.git
  26832. Changes in version 0.2.2.14-alpha - 2010-07-12
  26833. Tor 0.2.2.14-alpha greatly improves client-side handling of
  26834. circuit build timeouts, which are used to estimate speed and improve
  26835. performance. We also move to a much better GeoIP database, port Tor to
  26836. Windows CE, introduce new compile flags that improve code security,
  26837. add an eighth v3 directory authority, and address a lot of more
  26838. minor issues.
  26839. o Major bugfixes:
  26840. - Tor directory authorities no longer crash when started with a
  26841. cached-microdesc-consensus file in their data directory. Bugfix
  26842. on 0.2.2.6-alpha; fixes bug 1532.
  26843. - Treat an unset $HOME like an empty $HOME rather than triggering an
  26844. assert. Bugfix on 0.0.8pre1; fixes bug 1522.
  26845. - Ignore negative and large circuit build timeout values that can
  26846. happen during a suspend or hibernate. These values caused various
  26847. asserts to fire. Bugfix on 0.2.2.2-alpha; fixes bug 1245.
  26848. - Alter calculation of Pareto distribution parameter 'Xm' for
  26849. Circuit Build Timeout learning to use the weighted average of the
  26850. top N=3 modes (because we have three entry guards). Considering
  26851. multiple modes should improve the timeout calculation in some cases,
  26852. and prevent extremely high timeout values. Bugfix on 0.2.2.2-alpha;
  26853. fixes bug 1335.
  26854. - Alter calculation of Pareto distribution parameter 'Alpha' to use a
  26855. right censored distribution model. This approach improves over the
  26856. synthetic timeout generation approach that was producing insanely
  26857. high timeout values. Now we calculate build timeouts using truncated
  26858. times. Bugfix on 0.2.2.2-alpha; fixes bugs 1245 and 1335.
  26859. - Do not close circuits that are under construction when they reach
  26860. the circuit build timeout. Instead, leave them building (but do not
  26861. use them) for up until the time corresponding to the 95th percentile
  26862. on the Pareto CDF or 60 seconds, whichever is greater. This is done
  26863. to provide better data for the new Pareto model. This percentile
  26864. can be controlled by the consensus.
  26865. o Major features:
  26866. - Move to the June 2010 Maxmind GeoLite country db (rather than the
  26867. June 2009 ip-to-country GeoIP db) for our statistics that count
  26868. how many users relays are seeing from each country. Now we have
  26869. more accurate data for many African countries.
  26870. - Port Tor to build and run correctly on Windows CE systems, using
  26871. the wcecompat library. Contributed by Valerio Lupi.
  26872. - New "--enable-gcc-hardening" ./configure flag (off by default)
  26873. to turn on gcc compile time hardening options. It ensures
  26874. that signed ints have defined behavior (-fwrapv), enables
  26875. -D_FORTIFY_SOURCE=2 (requiring -O2), adds stack smashing protection
  26876. with canaries (-fstack-protector-all), turns on ASLR protection if
  26877. supported by the kernel (-fPIE, -pie), and adds additional security
  26878. related warnings. Verified to work on Mac OS X and Debian Lenny.
  26879. - New "--enable-linker-hardening" ./configure flag (off by default)
  26880. to turn on ELF specific hardening features (relro, now). This does
  26881. not work with Mac OS X or any other non-ELF binary format.
  26882. o New directory authorities:
  26883. - Set up maatuska (run by Linus Nordberg) as the eighth v3 directory
  26884. authority.
  26885. o Minor features:
  26886. - New config option "WarnUnsafeSocks 0" disables the warning that
  26887. occurs whenever Tor receives a socks handshake using a version of
  26888. the socks protocol that can only provide an IP address (rather
  26889. than a hostname). Setups that do DNS locally over Tor are fine,
  26890. and we shouldn't spam the logs in that case.
  26891. - Convert the HACKING file to asciidoc, and add a few new sections
  26892. to it, explaining how we use Git, how we make changelogs, and
  26893. what should go in a patch.
  26894. - Add a TIMEOUT_RATE keyword to the BUILDTIMEOUT_SET control port
  26895. event, to give information on the current rate of circuit timeouts
  26896. over our stored history.
  26897. - Add ability to disable circuit build time learning via consensus
  26898. parameter and via a LearnCircuitBuildTimeout config option. Also
  26899. automatically disable circuit build time calculation if we are
  26900. either a AuthoritativeDirectory, or if we fail to write our state
  26901. file. Fixes bug 1296.
  26902. - More gracefully handle corrupt state files, removing asserts
  26903. in favor of saving a backup and resetting state.
  26904. - Rename the "log.h" header to "torlog.h" so as to conflict with fewer
  26905. system headers.
  26906. o Minor bugfixes:
  26907. - Build correctly on OSX with zlib 1.2.4 and higher with all warnings
  26908. enabled.
  26909. - When a2x fails, mention that the user could disable manpages instead
  26910. of trying to fix their asciidoc installation.
  26911. - Where available, use Libevent 2.0's periodic timers so that our
  26912. once-per-second cleanup code gets called even more closely to
  26913. once per second than it would otherwise. Fixes bug 943.
  26914. - If you run a bridge that listens on multiple IP addresses, and
  26915. some user configures a bridge address that uses a different IP
  26916. address than your bridge writes in its router descriptor, and the
  26917. user doesn't specify an identity key, their Tor would discard the
  26918. descriptor because "it isn't one of our configured bridges", and
  26919. fail to bootstrap. Now believe the descriptor and bootstrap anyway.
  26920. Bugfix on 0.2.0.3-alpha.
  26921. - If OpenSSL fails to make a duplicate of a private or public key, log
  26922. an error message and try to exit cleanly. May help with debugging
  26923. if bug 1209 ever remanifests.
  26924. - Save a couple bytes in memory allocation every time we escape
  26925. certain characters in a string. Patch from Florian Zumbiehl.
  26926. - Make it explicit that we don't cannibalize one-hop circuits. This
  26927. happens in the wild, but doesn't turn out to be a problem because
  26928. we fortunately don't use those circuits. Many thanks to outofwords
  26929. for the initial analysis and to swissknife who confirmed that
  26930. two-hop circuits are actually created.
  26931. - Make directory mirrors report non-zero dirreq-v[23]-shares again.
  26932. Fixes bug 1564; bugfix on 0.2.2.9-alpha.
  26933. - Eliminate a case where a circuit build time warning was displayed
  26934. after network connectivity resumed. Bugfix on 0.2.2.2-alpha.
  26935. Changes in version 0.2.1.26 - 2010-05-02
  26936. Tor 0.2.1.26 addresses the recent connection and memory overload
  26937. problems we've been seeing on relays, especially relays with their
  26938. DirPort open. If your relay has been crashing, or you turned it off
  26939. because it used too many resources, give this release a try.
  26940. This release also fixes yet another instance of broken OpenSSL libraries
  26941. that was causing some relays to drop out of the consensus.
  26942. o Major bugfixes:
  26943. - Teach relays to defend themselves from connection overload. Relays
  26944. now close idle circuits early if it looks like they were intended
  26945. for directory fetches. Relays are also more aggressive about closing
  26946. TLS connections that have no circuits on them. Such circuits are
  26947. unlikely to be re-used, and tens of thousands of them were piling
  26948. up at the fast relays, causing the relays to run out of sockets
  26949. and memory. Bugfix on 0.2.0.22-rc (where clients started tunneling
  26950. their directory fetches over TLS).
  26951. - Fix SSL renegotiation behavior on OpenSSL versions like on Centos
  26952. that claim to be earlier than 0.9.8m, but which have in reality
  26953. backported huge swaths of 0.9.8m or 0.9.8n renegotiation
  26954. behavior. Possible fix for some cases of bug 1346.
  26955. - Directory mirrors were fetching relay descriptors only from v2
  26956. directory authorities, rather than v3 authorities like they should.
  26957. Only 2 v2 authorities remain (compared to 7 v3 authorities), leading
  26958. to a serious bottleneck. Bugfix on 0.2.0.9-alpha. Fixes bug 1324.
  26959. o Minor bugfixes:
  26960. - Finally get rid of the deprecated and now harmful notion of "clique
  26961. mode", where directory authorities maintain TLS connections to
  26962. every other relay.
  26963. o Testsuite fixes:
  26964. - In the util/threads test, no longer free the test_mutex before all
  26965. worker threads have finished. Bugfix on 0.2.1.6-alpha.
  26966. - The master thread could starve the worker threads quite badly on
  26967. certain systems, causing them to run only partially in the allowed
  26968. window. This resulted in test failures. Now the master thread sleeps
  26969. occasionally for a few microseconds while the two worker-threads
  26970. compete for the mutex. Bugfix on 0.2.0.1-alpha.
  26971. Changes in version 0.2.2.13-alpha - 2010-04-24
  26972. Tor 0.2.2.13-alpha addresses the recent connection and memory overload
  26973. problems we've been seeing on relays, especially relays with their
  26974. DirPort open. If your relay has been crashing, or you turned it off
  26975. because it used too many resources, give this release a try.
  26976. o Major bugfixes:
  26977. - Teach relays to defend themselves from connection overload. Relays
  26978. now close idle circuits early if it looks like they were intended
  26979. for directory fetches. Relays are also more aggressive about closing
  26980. TLS connections that have no circuits on them. Such circuits are
  26981. unlikely to be re-used, and tens of thousands of them were piling
  26982. up at the fast relays, causing the relays to run out of sockets
  26983. and memory. Bugfix on 0.2.0.22-rc (where clients started tunneling
  26984. their directory fetches over TLS).
  26985. o Minor features:
  26986. - Finally get rid of the deprecated and now harmful notion of "clique
  26987. mode", where directory authorities maintain TLS connections to
  26988. every other relay.
  26989. - Directory authorities now do an immediate reachability check as soon
  26990. as they hear about a new relay. This change should slightly reduce
  26991. the time between setting up a relay and getting listed as running
  26992. in the consensus. It should also improve the time between setting
  26993. up a bridge and seeing use by bridge users.
  26994. - Directory authorities no longer launch a TLS connection to every
  26995. relay as they startup. Now that we have 2k+ descriptors cached,
  26996. the resulting network hiccup is becoming a burden. Besides,
  26997. authorities already avoid voting about Running for the first half
  26998. hour of their uptime.
  26999. Changes in version 0.2.2.12-alpha - 2010-04-20
  27000. Tor 0.2.2.12-alpha fixes a critical bug in how directory authorities
  27001. handle and vote on descriptors. It was causing relays to drop out of
  27002. the consensus.
  27003. o Major bugfixes:
  27004. - Many relays have been falling out of the consensus lately because
  27005. not enough authorities know about their descriptor for them to get
  27006. a majority of votes. When we deprecated the v2 directory protocol,
  27007. we got rid of the only way that v3 authorities can hear from each
  27008. other about other descriptors. Now authorities examine every v3
  27009. vote for new descriptors, and fetch them from that authority. Bugfix
  27010. on 0.2.1.23.
  27011. - Fix two typos in tor_vasprintf() that broke the compile on Windows,
  27012. and a warning in or.h related to bandwidth_weight_rule_t that
  27013. prevented clean compile on OS X. Fixes bug 1363; bugfix on
  27014. 0.2.2.11-alpha.
  27015. - Fix a segfault on relays when DirReqStatistics is enabled
  27016. and 24 hours pass. Bug found by keb. Fixes bug 1365; bugfix on
  27017. 0.2.2.11-alpha.
  27018. o Minor bugfixes:
  27019. - Demote a confusing TLS warning that relay operators might get when
  27020. someone tries to talk to their OrPort. It is neither the operator's
  27021. fault nor can they do anything about it. Fixes bug 1364; bugfix
  27022. on 0.2.0.14-alpha.
  27023. Changes in version 0.2.2.11-alpha - 2010-04-15
  27024. Tor 0.2.2.11-alpha fixes yet another instance of broken OpenSSL
  27025. libraries that was causing some relays to drop out of the consensus.
  27026. o Major bugfixes:
  27027. - Directory mirrors were fetching relay descriptors only from v2
  27028. directory authorities, rather than v3 authorities like they should.
  27029. Only 2 v2 authorities remain (compared to 7 v3 authorities), leading
  27030. to a serious bottleneck. Bugfix on 0.2.0.9-alpha. Fixes bug 1324.
  27031. - Fix a parsing error that made every possible value of
  27032. CircPriorityHalflifeMsec get treated as "1 msec". Bugfix
  27033. on 0.2.2.7-alpha. Rename CircPriorityHalflifeMsec to
  27034. CircuitPriorityHalflifeMsec, so authorities can tell newer relays
  27035. about the option without breaking older ones.
  27036. - Fix SSL renegotiation behavior on OpenSSL versions like on Centos
  27037. that claim to be earlier than 0.9.8m, but which have in reality
  27038. backported huge swaths of 0.9.8m or 0.9.8n renegotiation
  27039. behavior. Possible fix for some cases of bug 1346.
  27040. o Minor features:
  27041. - Experiment with a more aggressive approach to preventing clients
  27042. from making one-hop exit streams. Exit relays who want to try it
  27043. out can set "RefuseUnknownExits 1" in their torrc, and then look
  27044. for "Attempt by %s to open a stream" log messages. Let us know
  27045. how it goes!
  27046. - Add support for statically linking zlib by specifying
  27047. --enable-static-zlib, to go with our support for statically linking
  27048. openssl and libevent. Resolves bug 1358.
  27049. o Minor bugfixes:
  27050. - Fix a segfault that happens whenever a Tor client that is using
  27051. libevent2's bufferevents gets a hup signal. Bugfix on 0.2.2.5-alpha;
  27052. fixes bug 1341.
  27053. - When we cleaned up the contrib/tor-exit-notice.html file, we left
  27054. out the first line. Fixes bug 1295.
  27055. - When building the manpage from a tarball, we required asciidoc, but
  27056. the asciidoc -> roff/html conversion was already done for the
  27057. tarball. Make 'make' complain only when we need asciidoc (either
  27058. because we're compiling directly from git, or because we altered
  27059. the asciidoc manpage in the tarball). Bugfix on 0.2.2.9-alpha.
  27060. - When none of the directory authorities vote on any params, Tor
  27061. segfaulted when trying to make the consensus from the votes. We
  27062. didn't trigger the bug in practice, because authorities do include
  27063. params in their votes. Bugfix on 0.2.2.10-alpha; fixes bug 1322.
  27064. o Testsuite fixes:
  27065. - In the util/threads test, no longer free the test_mutex before all
  27066. worker threads have finished. Bugfix on 0.2.1.6-alpha.
  27067. - The master thread could starve the worker threads quite badly on
  27068. certain systems, causing them to run only partially in the allowed
  27069. window. This resulted in test failures. Now the master thread sleeps
  27070. occasionally for a few microseconds while the two worker-threads
  27071. compete for the mutex. Bugfix on 0.2.0.1-alpha.
  27072. Changes in version 0.2.2.10-alpha - 2010-03-07
  27073. Tor 0.2.2.10-alpha fixes a regression introduced in 0.2.2.9-alpha that
  27074. could prevent relays from guessing their IP address correctly. It also
  27075. starts the groundwork for another client-side performance boost, since
  27076. currently we're not making efficient use of relays that have both the
  27077. Guard flag and the Exit flag.
  27078. o Major bugfixes:
  27079. - Fix a regression from our patch for bug 1244 that caused relays
  27080. to guess their IP address incorrectly if they didn't set Address
  27081. in their torrc and/or their address fails to resolve. Bugfix on
  27082. 0.2.2.9-alpha; fixes bug 1269.
  27083. o Major features (performance):
  27084. - Directory authorities now compute consensus weightings that instruct
  27085. clients how to weight relays flagged as Guard, Exit, Guard+Exit,
  27086. and no flag. Clients that use these weightings will distribute
  27087. network load more evenly across these different relay types. The
  27088. weightings are in the consensus so we can change them globally in
  27089. the future. Extra thanks to "outofwords" for finding some nasty
  27090. security bugs in the first implementation of this feature.
  27091. o Minor features (performance):
  27092. - Always perform router selections using weighted relay bandwidth,
  27093. even if we don't need a high capacity circuit at the time. Non-fast
  27094. circuits now only differ from fast ones in that they can use relays
  27095. not marked with the Fast flag. This "feature" could turn out to
  27096. be a horrible bug; we should investigate more before it goes into
  27097. a stable release.
  27098. o Minor features:
  27099. - Allow disabling building of the manpages. Skipping the manpage
  27100. speeds up the build considerably.
  27101. o Minor bugfixes (on 0.2.2.x):
  27102. - Fix a memleak in the EXTENDCIRCUIT logic. Spotted by coverity.
  27103. Bugfix on 0.2.2.9-alpha.
  27104. - Disallow values larger than INT32_MAX for PerConnBWRate|Burst
  27105. config option. Bugfix on 0.2.2.7-alpha.
  27106. - Ship the asciidoc-helper file in the tarball, so that people can
  27107. build from source if they want to, and touching the .1.txt files
  27108. doesn't break the build. Bugfix on 0.2.2.9-alpha.
  27109. o Minor bugfixes (on 0.2.1.x or earlier):
  27110. - Fix a dereference-then-NULL-check sequence when publishing
  27111. descriptors. Bugfix on 0.2.1.5-alpha. Discovered by ekir; fixes
  27112. bug 1255.
  27113. - Fix another dereference-then-NULL-check sequence. Bugfix on
  27114. 0.2.1.14-rc. Discovered by ekir; fixes bug 1256.
  27115. - Make sure we treat potentially not NUL-terminated strings correctly.
  27116. Bugfix on 0.1.1.13-alpha. Discovered by rieo; fixes bug 1257.
  27117. o Code simplifications and refactoring:
  27118. - Fix some urls in the exit notice file and make it XHTML1.1 strict
  27119. compliant. Based on a patch from Christian Kujau.
  27120. - Don't use sed in asciidoc-helper anymore.
  27121. - Make the build process fail if asciidoc cannot be found and
  27122. building with asciidoc isn't disabled.
  27123. Changes in version 0.2.2.9-alpha - 2010-02-22
  27124. Tor 0.2.2.9-alpha makes Tor work again on the latest OS X, updates the
  27125. location of a directory authority, and cleans up a bunch of small bugs.
  27126. o Directory authority changes:
  27127. - Change IP address for dannenberg (v3 directory authority), and
  27128. remove moria2 (obsolete v1, v2 directory authority and v0 hidden
  27129. service directory authority) from the list.
  27130. o Major bugfixes:
  27131. - Make Tor work again on the latest OS X: when deciding whether to
  27132. use strange flags to turn TLS renegotiation on, detect the OpenSSL
  27133. version at run-time, not compile time. We need to do this because
  27134. Apple doesn't update its dev-tools headers when it updates its
  27135. libraries in a security patch.
  27136. - Fix a potential buffer overflow in lookup_last_hid_serv_request()
  27137. that could happen on 32-bit platforms with 64-bit time_t. Also fix
  27138. a memory leak when requesting a hidden service descriptor we've
  27139. requested before. Fixes bug 1242, bugfix on 0.2.0.18-alpha. Found
  27140. by aakova.
  27141. - Authorities could be tricked into giving out the Exit flag to relays
  27142. that didn't allow exiting to any ports. This bug could screw
  27143. with load balancing and stats. Bugfix on 0.1.1.6-alpha; fixes bug
  27144. 1238. Bug discovered by Martin Kowalczyk.
  27145. - When freeing a session key, zero it out completely. We only zeroed
  27146. the first ptrsize bytes. Bugfix on 0.0.2pre8. Discovered and
  27147. patched by ekir. Fixes bug 1254.
  27148. o Minor bugfixes:
  27149. - Fix static compilation by listing the openssl libraries in the right
  27150. order. Bugfix on Tor 0.2.2.8-alpha; fixes bug 1237.
  27151. - Resume handling .exit hostnames in a special way: originally we
  27152. stripped the .exit part and used the requested exit relay. In
  27153. 0.2.2.1-alpha we stopped treating them in any special way, meaning
  27154. if you use a .exit address then Tor will pass it on to the exit
  27155. relay. Now we reject the .exit stream outright, since that behavior
  27156. might be more expected by the user. Found and diagnosed by Scott
  27157. Bennett and Downie on or-talk.
  27158. - Don't spam the controller with events when we have no file
  27159. descriptors available. Bugfix on 0.2.1.5-alpha. (Rate-limiting
  27160. for log messages was already solved from bug 748.)
  27161. - Avoid a bogus overlapped memcpy in tor_addr_copy(). Reported by
  27162. "memcpyfail".
  27163. - Make the DNSPort option work with libevent 2.x. Don't alter the
  27164. behavior for libevent 1.x. Fixes bug 1143. Found by SwissTorExit.
  27165. - Emit a GUARD DROPPED controller event for a case we missed.
  27166. - Make more fields in the controller protocol case-insensitive, since
  27167. control-spec.txt said they were.
  27168. - Refactor resolve_my_address() to not use gethostbyname() anymore.
  27169. Fixes bug 1244; bugfix on 0.0.2pre25. Reported by Mike Mestnik.
  27170. - Fix a spec conformance issue: the network-status-version token
  27171. must be the first token in a v3 consensus or vote. Discovered by
  27172. parakeep. Bugfix on 0.2.0.3-alpha.
  27173. o Code simplifications and refactoring:
  27174. - Generate our manpage and HTML documentation using Asciidoc. This
  27175. change should make it easier to maintain the documentation, and
  27176. produce nicer HTML.
  27177. - Remove the --enable-iphone option. According to reports from Marco
  27178. Bonetti, Tor builds fine without any special tweaking on recent
  27179. iPhone SDK versions.
  27180. - Removed some unnecessary files from the source distribution. The
  27181. AUTHORS file has now been merged into the people page on the
  27182. website. The roadmaps and design doc can now be found in the
  27183. projects directory in svn.
  27184. - Enabled various circuit build timeout constants to be controlled
  27185. by consensus parameters. Also set better defaults for these
  27186. parameters based on experimentation on broadband and simulated
  27187. high latency links.
  27188. o Minor features:
  27189. - The 'EXTENDCIRCUIT' control port command can now be used with
  27190. a circ id of 0 and no path. This feature will cause Tor to build
  27191. a new 'fast' general purpose circuit using its own path selection
  27192. algorithms.
  27193. - Added a BUILDTIMEOUT_SET controller event to describe changes
  27194. to the circuit build timeout.
  27195. - Future-proof the controller protocol a bit by ignoring keyword
  27196. arguments we do not recognize.
  27197. - Expand homedirs passed to tor-checkkey. This should silence a
  27198. coverity complaint about passing a user-supplied string into
  27199. open() without checking it.
  27200. Changes in version 0.2.1.25 - 2010-03-16
  27201. Tor 0.2.1.25 fixes a regression introduced in 0.2.1.23 that could
  27202. prevent relays from guessing their IP address correctly. It also fixes
  27203. several minor potential security bugs.
  27204. o Major bugfixes:
  27205. - Fix a regression from our patch for bug 1244 that caused relays
  27206. to guess their IP address incorrectly if they didn't set Address
  27207. in their torrc and/or their address fails to resolve. Bugfix on
  27208. 0.2.1.23; fixes bug 1269.
  27209. - When freeing a session key, zero it out completely. We only zeroed
  27210. the first ptrsize bytes. Bugfix on 0.0.2pre8. Discovered and
  27211. patched by ekir. Fixes bug 1254.
  27212. o Minor bugfixes:
  27213. - Fix a dereference-then-NULL-check sequence when publishing
  27214. descriptors. Bugfix on 0.2.1.5-alpha. Discovered by ekir; fixes
  27215. bug 1255.
  27216. - Fix another dereference-then-NULL-check sequence. Bugfix on
  27217. 0.2.1.14-rc. Discovered by ekir; fixes bug 1256.
  27218. - Make sure we treat potentially not NUL-terminated strings correctly.
  27219. Bugfix on 0.1.1.13-alpha. Discovered by rieo; fixes bug 1257.
  27220. Changes in version 0.2.1.24 - 2010-02-21
  27221. Tor 0.2.1.24 makes Tor work again on the latest OS X -- this time
  27222. for sure!
  27223. o Minor bugfixes:
  27224. - Work correctly out-of-the-box with even more vendor-patched versions
  27225. of OpenSSL. In particular, make it so Debian and OS X don't need
  27226. customized patches to run/build.
  27227. Changes in version 0.2.1.23 - 2010-02-13
  27228. Tor 0.2.1.23 fixes a huge client-side performance bug, makes Tor work
  27229. again on the latest OS X, and updates the location of a directory
  27230. authority.
  27231. o Major bugfixes (performance):
  27232. - We were selecting our guards uniformly at random, and then weighting
  27233. which of our guards we'd use uniformly at random. This imbalance
  27234. meant that Tor clients were severely limited on throughput (and
  27235. probably latency too) by the first hop in their circuit. Now we
  27236. select guards weighted by currently advertised bandwidth. We also
  27237. automatically discard guards picked using the old algorithm. Fixes
  27238. bug 1217; bugfix on 0.2.1.3-alpha. Found by Mike Perry.
  27239. o Major bugfixes:
  27240. - Make Tor work again on the latest OS X: when deciding whether to
  27241. use strange flags to turn TLS renegotiation on, detect the OpenSSL
  27242. version at run-time, not compile time. We need to do this because
  27243. Apple doesn't update its dev-tools headers when it updates its
  27244. libraries in a security patch.
  27245. - Fix a potential buffer overflow in lookup_last_hid_serv_request()
  27246. that could happen on 32-bit platforms with 64-bit time_t. Also fix
  27247. a memory leak when requesting a hidden service descriptor we've
  27248. requested before. Fixes bug 1242, bugfix on 0.2.0.18-alpha. Found
  27249. by aakova.
  27250. o Directory authority changes:
  27251. - Change IP address for dannenberg (v3 directory authority), and
  27252. remove moria2 (obsolete v1, v2 directory authority and v0 hidden
  27253. service directory authority) from the list.
  27254. o Minor bugfixes:
  27255. - Refactor resolve_my_address() to not use gethostbyname() anymore.
  27256. Fixes bug 1244; bugfix on 0.0.2pre25. Reported by Mike Mestnik.
  27257. o Minor features:
  27258. - Avoid a mad rush at the beginning of each month when each client
  27259. rotates half of its guards. Instead we spread the rotation out
  27260. throughout the month, but we still avoid leaving a precise timestamp
  27261. in the state file about when we first picked the guard. Improves
  27262. over the behavior introduced in 0.1.2.17.
  27263. Changes in version 0.2.2.8-alpha - 2010-01-26
  27264. Tor 0.2.2.8-alpha fixes a crash bug in 0.2.2.7-alpha that has been
  27265. causing bridge relays to disappear. If you're running a bridge,
  27266. please upgrade.
  27267. o Major bugfixes:
  27268. - Fix a memory corruption bug on bridges that occurred during the
  27269. inclusion of stats data in extra-info descriptors. Also fix the
  27270. interface for geoip_get_bridge_stats* to prevent similar bugs in
  27271. the future. Diagnosis by Tas, patch by Karsten and Sebastian.
  27272. Fixes bug 1208; bugfix on 0.2.2.7-alpha.
  27273. o Minor bugfixes:
  27274. - Ignore OutboundBindAddress when connecting to localhost.
  27275. Connections to localhost need to come _from_ localhost, or else
  27276. local servers (like DNS and outgoing HTTP/SOCKS proxies) will often
  27277. refuse to listen.
  27278. Changes in version 0.2.2.7-alpha - 2010-01-19
  27279. Tor 0.2.2.7-alpha fixes a huge client-side performance bug, as well
  27280. as laying the groundwork for further relay-side performance fixes. It
  27281. also starts cleaning up client behavior with respect to the EntryNodes,
  27282. ExitNodes, and StrictNodes config options.
  27283. This release also rotates two directory authority keys, due to a
  27284. security breach of some of the Torproject servers.
  27285. o Directory authority changes:
  27286. - Rotate keys (both v3 identity and relay identity) for moria1
  27287. and gabelmoo.
  27288. o Major features (performance):
  27289. - We were selecting our guards uniformly at random, and then weighting
  27290. which of our guards we'd use uniformly at random. This imbalance
  27291. meant that Tor clients were severely limited on throughput (and
  27292. probably latency too) by the first hop in their circuit. Now we
  27293. select guards weighted by currently advertised bandwidth. We also
  27294. automatically discard guards picked using the old algorithm. Fixes
  27295. bug 1217; bugfix on 0.2.1.3-alpha. Found by Mike Perry.
  27296. - When choosing which cells to relay first, relays can now favor
  27297. circuits that have been quiet recently, to provide lower latency
  27298. for low-volume circuits. By default, relays enable or disable this
  27299. feature based on a setting in the consensus. You can override
  27300. this default by using the new "CircuitPriorityHalflife" config
  27301. option. Design and code by Ian Goldberg, Can Tang, and Chris
  27302. Alexander.
  27303. - Add separate per-conn write limiting to go with the per-conn read
  27304. limiting. We added a global write limit in Tor 0.1.2.5-alpha,
  27305. but never per-conn write limits.
  27306. - New consensus params "bwconnrate" and "bwconnburst" to let us
  27307. rate-limit client connections as they enter the network. It's
  27308. controlled in the consensus so we can turn it on and off for
  27309. experiments. It's starting out off. Based on proposal 163.
  27310. o Major features (relay selection options):
  27311. - Switch to a StrictNodes config option, rather than the previous
  27312. "StrictEntryNodes" / "StrictExitNodes" separation that was missing a
  27313. "StrictExcludeNodes" option.
  27314. - If EntryNodes, ExitNodes, ExcludeNodes, or ExcludeExitNodes
  27315. change during a config reload, mark and discard all our origin
  27316. circuits. This fix should address edge cases where we change the
  27317. config options and but then choose a circuit that we created before
  27318. the change.
  27319. - If EntryNodes or ExitNodes are set, be more willing to use an
  27320. unsuitable (e.g. slow or unstable) circuit. The user asked for it,
  27321. they get it.
  27322. - Make EntryNodes config option much more aggressive even when
  27323. StrictNodes is not set. Before it would prepend your requested
  27324. entrynodes to your list of guard nodes, but feel free to use others
  27325. after that. Now it chooses only from your EntryNodes if any of
  27326. those are available, and only falls back to others if a) they're
  27327. all down and b) StrictNodes is not set.
  27328. - Now we refresh your entry guards from EntryNodes at each consensus
  27329. fetch -- rather than just at startup and then they slowly rot as
  27330. the network changes.
  27331. o Major bugfixes:
  27332. - Stop bridge directory authorities from answering dbg-stability.txt
  27333. directory queries, which would let people fetch a list of all
  27334. bridge identities they track. Bugfix on 0.2.1.6-alpha.
  27335. o Minor features:
  27336. - Log a notice when we get a new control connection. Now it's easier
  27337. for security-conscious users to recognize when a local application
  27338. is knocking on their controller door. Suggested by bug 1196.
  27339. - New config option "CircuitStreamTimeout" to override our internal
  27340. timeout schedule for how many seconds until we detach a stream from
  27341. a circuit and try a new circuit. If your network is particularly
  27342. slow, you might want to set this to a number like 60.
  27343. - New controller command "getinfo config-text". It returns the
  27344. contents that Tor would write if you send it a SAVECONF command,
  27345. so the controller can write the file to disk itself.
  27346. - New options for SafeLogging to allow scrubbing only log messages
  27347. generated while acting as a relay.
  27348. - Ship the bridges spec file in the tarball too.
  27349. - Avoid a mad rush at the beginning of each month when each client
  27350. rotates half of its guards. Instead we spread the rotation out
  27351. throughout the month, but we still avoid leaving a precise timestamp
  27352. in the state file about when we first picked the guard. Improves
  27353. over the behavior introduced in 0.1.2.17.
  27354. o Minor bugfixes (compiling):
  27355. - Fix compilation on OS X 10.3, which has a stub mlockall() but
  27356. hides it. Bugfix on 0.2.2.6-alpha.
  27357. - Fix compilation on Solaris by removing support for the
  27358. DisableAllSwap config option. Solaris doesn't have an rlimit for
  27359. mlockall, so we cannot use it safely. Fixes bug 1198; bugfix on
  27360. 0.2.2.6-alpha.
  27361. o Minor bugfixes (crashes):
  27362. - Do not segfault when writing buffer stats when we haven't observed
  27363. a single circuit to report about. Found by Fabian Lanze. Bugfix on
  27364. 0.2.2.1-alpha.
  27365. - If we're in the pathological case where there's no exit bandwidth
  27366. but there is non-exit bandwidth, or no guard bandwidth but there
  27367. is non-guard bandwidth, don't crash during path selection. Bugfix
  27368. on 0.2.0.3-alpha.
  27369. - Fix an impossible-to-actually-trigger buffer overflow in relay
  27370. descriptor generation. Bugfix on 0.1.0.15.
  27371. o Minor bugfixes (privacy):
  27372. - Fix an instance where a Tor directory mirror might accidentally
  27373. log the IP address of a misbehaving Tor client. Bugfix on
  27374. 0.1.0.1-rc.
  27375. - Don't list Windows capabilities in relay descriptors. We never made
  27376. use of them, and maybe it's a bad idea to publish them. Bugfix
  27377. on 0.1.1.8-alpha.
  27378. o Minor bugfixes (other):
  27379. - Resolve an edge case in path weighting that could make us misweight
  27380. our relay selection. Fixes bug 1203; bugfix on 0.0.8rc1.
  27381. - Fix statistics on client numbers by country as seen by bridges that
  27382. were broken in 0.2.2.1-alpha. Also switch to reporting full 24-hour
  27383. intervals instead of variable 12-to-48-hour intervals.
  27384. - After we free an internal connection structure, overwrite it
  27385. with a different memory value than we use for overwriting a freed
  27386. internal circuit structure. Should help with debugging. Suggested
  27387. by bug 1055.
  27388. - Update our OpenSSL 0.9.8l fix so that it works with OpenSSL 0.9.8m
  27389. too.
  27390. o Removed features:
  27391. - Remove the HSAuthorityRecordStats option that version 0 hidden
  27392. service authorities could have used to track statistics of overall
  27393. hidden service usage.
  27394. Changes in version 0.2.1.22 - 2010-01-19
  27395. Tor 0.2.1.22 fixes a critical privacy problem in bridge directory
  27396. authorities -- it would tell you its whole history of bridge descriptors
  27397. if you make the right directory request. This stable update also
  27398. rotates two of the seven v3 directory authority keys and locations.
  27399. o Directory authority changes:
  27400. - Rotate keys (both v3 identity and relay identity) for moria1
  27401. and gabelmoo.
  27402. o Major bugfixes:
  27403. - Stop bridge directory authorities from answering dbg-stability.txt
  27404. directory queries, which would let people fetch a list of all
  27405. bridge identities they track. Bugfix on 0.2.1.6-alpha.
  27406. Changes in version 0.2.1.21 - 2009-12-21
  27407. Tor 0.2.1.21 fixes an incompatibility with the most recent OpenSSL
  27408. library. If you use Tor on Linux / Unix and you're getting SSL
  27409. renegotiation errors, upgrading should help. We also recommend an
  27410. upgrade if you're an exit relay.
  27411. o Major bugfixes:
  27412. - Work around a security feature in OpenSSL 0.9.8l that prevents our
  27413. handshake from working unless we explicitly tell OpenSSL that we
  27414. are using SSL renegotiation safely. We are, of course, but OpenSSL
  27415. 0.9.8l won't work unless we say we are.
  27416. - Avoid crashing if the client is trying to upload many bytes and the
  27417. circuit gets torn down at the same time, or if the flip side
  27418. happens on the exit relay. Bugfix on 0.2.0.1-alpha; fixes bug 1150.
  27419. o Minor bugfixes:
  27420. - Do not refuse to learn about authority certs and v2 networkstatus
  27421. documents that are older than the latest consensus. This bug might
  27422. have degraded client bootstrapping. Bugfix on 0.2.0.10-alpha.
  27423. Spotted and fixed by xmux.
  27424. - Fix a couple of very-hard-to-trigger memory leaks, and one hard-to-
  27425. trigger platform-specific option misparsing case found by Coverity
  27426. Scan.
  27427. - Fix a compilation warning on Fedora 12 by removing an impossible-to-
  27428. trigger assert. Fixes bug 1173.
  27429. Changes in version 0.2.2.6-alpha - 2009-11-19
  27430. Tor 0.2.2.6-alpha lays the groundwork for many upcoming features:
  27431. support for the new lower-footprint "microdescriptor" directory design,
  27432. future-proofing our consensus format against new hash functions or
  27433. other changes, and an Android port. It also makes Tor compatible with
  27434. the upcoming OpenSSL 0.9.8l release, and fixes a variety of bugs.
  27435. o Major features:
  27436. - Directory authorities can now create, vote on, and serve multiple
  27437. parallel formats of directory data as part of their voting process.
  27438. Partially implements Proposal 162: "Publish the consensus in
  27439. multiple flavors".
  27440. - Directory authorities can now agree on and publish small summaries
  27441. of router information that clients can use in place of regular
  27442. server descriptors. This transition will eventually allow clients
  27443. to use far less bandwidth for downloading information about the
  27444. network. Begins the implementation of Proposal 158: "Clients
  27445. download consensus + microdescriptors".
  27446. - The directory voting system is now extensible to use multiple hash
  27447. algorithms for signatures and resource selection. Newer formats
  27448. are signed with SHA256, with a possibility for moving to a better
  27449. hash algorithm in the future.
  27450. - New DisableAllSwap option. If set to 1, Tor will attempt to lock all
  27451. current and future memory pages via mlockall(). On supported
  27452. platforms (modern Linux and probably BSD but not Windows or OS X),
  27453. this should effectively disable any and all attempts to page out
  27454. memory. This option requires that you start your Tor as root --
  27455. if you use DisableAllSwap, please consider using the User option
  27456. to properly reduce the privileges of your Tor.
  27457. - Numerous changes, bugfixes, and workarounds from Nathan Freitas
  27458. to help Tor build correctly for Android phones.
  27459. o Major bugfixes:
  27460. - Work around a security feature in OpenSSL 0.9.8l that prevents our
  27461. handshake from working unless we explicitly tell OpenSSL that we
  27462. are using SSL renegotiation safely. We are, but OpenSSL 0.9.8l
  27463. won't work unless we say we are.
  27464. o Minor bugfixes:
  27465. - Fix a crash bug when trying to initialize the evdns module in
  27466. Libevent 2. Bugfix on 0.2.1.16-rc.
  27467. - Stop logging at severity 'warn' when some other Tor client tries
  27468. to establish a circuit with us using weak DH keys. It's a protocol
  27469. violation, but that doesn't mean ordinary users need to hear about
  27470. it. Fixes the bug part of bug 1114. Bugfix on 0.1.0.13.
  27471. - Do not refuse to learn about authority certs and v2 networkstatus
  27472. documents that are older than the latest consensus. This bug might
  27473. have degraded client bootstrapping. Bugfix on 0.2.0.10-alpha.
  27474. Spotted and fixed by xmux.
  27475. - Fix numerous small code-flaws found by Coverity Scan Rung 3.
  27476. - If all authorities restart at once right before a consensus vote,
  27477. nobody will vote about "Running", and clients will get a consensus
  27478. with no usable relays. Instead, authorities refuse to build a
  27479. consensus if this happens. Bugfix on 0.2.0.10-alpha; fixes bug 1066.
  27480. - If your relay can't keep up with the number of incoming create
  27481. cells, it would log one warning per failure into your logs. Limit
  27482. warnings to 1 per minute. Bugfix on 0.0.2pre10; fixes bug 1042.
  27483. - Bridges now use "reject *:*" as their default exit policy. Bugfix
  27484. on 0.2.0.3-alpha; fixes bug 1113.
  27485. - Fix a memory leak on directory authorities during voting that was
  27486. introduced in 0.2.2.1-alpha. Found via valgrind.
  27487. Changes in version 0.2.1.20 - 2009-10-15
  27488. Tor 0.2.1.20 fixes a crash bug when you're accessing many hidden
  27489. services at once, prepares for more performance improvements, and
  27490. fixes a bunch of smaller bugs.
  27491. The Windows and OS X bundles also include a more recent Vidalia,
  27492. and switch from Privoxy to Polipo.
  27493. The OS X installers are now drag and drop. It's best to un-install
  27494. Tor/Vidalia and then install this new bundle, rather than upgrade. If
  27495. you want to upgrade, you'll need to update the paths for Tor and Polipo
  27496. in the Vidalia Settings window.
  27497. o Major bugfixes:
  27498. - Send circuit or stream sendme cells when our window has decreased
  27499. by 100 cells, not when it has decreased by 101 cells. Bug uncovered
  27500. by Karsten when testing the "reduce circuit window" performance
  27501. patch. Bugfix on the 54th commit on Tor -- from July 2002,
  27502. before the release of Tor 0.0.0. This is the new winner of the
  27503. oldest-bug prize.
  27504. - Fix a remotely triggerable memory leak when a consensus document
  27505. contains more than one signature from the same voter. Bugfix on
  27506. 0.2.0.3-alpha.
  27507. - Avoid segfault in rare cases when finishing an introduction circuit
  27508. as a client and finding out that we don't have an introduction key
  27509. for it. Fixes bug 1073. Reported by Aaron Swartz.
  27510. o Major features:
  27511. - Tor now reads the "circwindow" parameter out of the consensus,
  27512. and uses that value for its circuit package window rather than the
  27513. default of 1000 cells. Begins the implementation of proposal 168.
  27514. o New directory authorities:
  27515. - Set up urras (run by Jacob Appelbaum) as the seventh v3 directory
  27516. authority.
  27517. - Move moria1 and tonga to alternate IP addresses.
  27518. o Minor bugfixes:
  27519. - Fix a signed/unsigned compile warning in 0.2.1.19.
  27520. - Fix possible segmentation fault on directory authorities. Bugfix on
  27521. 0.2.1.14-rc.
  27522. - Fix an extremely rare infinite recursion bug that could occur if
  27523. we tried to log a message after shutting down the log subsystem.
  27524. Found by Matt Edman. Bugfix on 0.2.0.16-alpha.
  27525. - Fix an obscure bug where hidden services on 64-bit big-endian
  27526. systems might mis-read the timestamp in v3 introduce cells, and
  27527. refuse to connect back to the client. Discovered by "rotor".
  27528. Bugfix on 0.2.1.6-alpha.
  27529. - We were triggering a CLOCK_SKEW controller status event whenever
  27530. we connect via the v2 connection protocol to any relay that has
  27531. a wrong clock. Instead, we should only inform the controller when
  27532. it's a trusted authority that claims our clock is wrong. Bugfix
  27533. on 0.2.0.20-rc; starts to fix bug 1074. Reported by SwissTorExit.
  27534. - We were telling the controller about CHECKING_REACHABILITY and
  27535. REACHABILITY_FAILED status events whenever we launch a testing
  27536. circuit or notice that one has failed. Instead, only tell the
  27537. controller when we want to inform the user of overall success or
  27538. overall failure. Bugfix on 0.1.2.6-alpha. Fixes bug 1075. Reported
  27539. by SwissTorExit.
  27540. - Don't warn when we're using a circuit that ends with a node
  27541. excluded in ExcludeExitNodes, but the circuit is not used to access
  27542. the outside world. This should help fix bug 1090. Bugfix on
  27543. 0.2.1.6-alpha.
  27544. - Work around a small memory leak in some versions of OpenSSL that
  27545. stopped the memory used by the hostname TLS extension from being
  27546. freed.
  27547. o Minor features:
  27548. - Add a "getinfo status/accepted-server-descriptor" controller
  27549. command, which is the recommended way for controllers to learn
  27550. whether our server descriptor has been successfully received by at
  27551. least on directory authority. Un-recommend good-server-descriptor
  27552. getinfo and status events until we have a better design for them.
  27553. Changes in version 0.2.2.5-alpha - 2009-10-11
  27554. Tor 0.2.2.5-alpha fixes a few compile problems in 0.2.2.4-alpha.
  27555. o Major bugfixes:
  27556. - Make the tarball compile again. Oops. Bugfix on 0.2.2.4-alpha.
  27557. o Directory authorities:
  27558. - Temporarily (just for this release) move dizum to an alternate
  27559. IP address.
  27560. Changes in version 0.2.2.4-alpha - 2009-10-10
  27561. Tor 0.2.2.4-alpha fixes more crash bugs in 0.2.2.2-alpha. It also
  27562. introduces a new unit test framework, shifts directry authority
  27563. addresses around to reduce the impact from recent blocking events,
  27564. and fixes a few smaller bugs.
  27565. o Major bugfixes:
  27566. - Fix several more asserts in the circuit_build_times code, for
  27567. example one that causes Tor to fail to start once we have
  27568. accumulated 5000 build times in the state file. Bugfixes on
  27569. 0.2.2.2-alpha; fixes bug 1108.
  27570. o New directory authorities:
  27571. - Move moria1 and Tonga to alternate IP addresses.
  27572. o Minor features:
  27573. - Log SSL state transitions at debug level during handshake, and
  27574. include SSL states in error messages. This may help debug future
  27575. SSL handshake issues.
  27576. - Add a new "Handshake" log domain for activities that happen
  27577. during the TLS handshake.
  27578. - Revert to the "June 3 2009" ip-to-country file. The September one
  27579. seems to have removed most US IP addresses.
  27580. - Directory authorities now reject Tor relays with versions less than
  27581. 0.1.2.14. This step cuts out four relays from the current network,
  27582. none of which are very big.
  27583. o Minor bugfixes:
  27584. - Fix a couple of smaller issues with gathering statistics. Bugfixes
  27585. on 0.2.2.1-alpha.
  27586. - Fix two memory leaks in the error case of
  27587. circuit_build_times_parse_state(). Bugfix on 0.2.2.2-alpha.
  27588. - Don't count one-hop circuits when we're estimating how long it
  27589. takes circuits to build on average. Otherwise we'll set our circuit
  27590. build timeout lower than we should. Bugfix on 0.2.2.2-alpha.
  27591. - Directory authorities no longer change their opinion of, or vote on,
  27592. whether a router is Running, unless they have themselves been
  27593. online long enough to have some idea. Bugfix on 0.2.0.6-alpha.
  27594. Fixes bug 1023.
  27595. o Code simplifications and refactoring:
  27596. - Revise our unit tests to use the "tinytest" framework, so we
  27597. can run tests in their own processes, have smarter setup/teardown
  27598. code, and so on. The unit test code has moved to its own
  27599. subdirectory, and has been split into multiple modules.
  27600. Changes in version 0.2.2.3-alpha - 2009-09-23
  27601. Tor 0.2.2.3-alpha fixes a few crash bugs in 0.2.2.2-alpha.
  27602. o Major bugfixes:
  27603. - Fix an overzealous assert in our new circuit build timeout code.
  27604. Bugfix on 0.2.2.2-alpha; fixes bug 1103.
  27605. o Minor bugfixes:
  27606. - If the networkstatus consensus tells us that we should use a
  27607. negative circuit package window, ignore it. Otherwise we'll
  27608. believe it and then trigger an assert. Bugfix on 0.2.2.2-alpha.
  27609. Changes in version 0.2.2.2-alpha - 2009-09-21
  27610. Tor 0.2.2.2-alpha introduces our latest performance improvement for
  27611. clients: Tor tracks the average time it takes to build a circuit, and
  27612. avoids using circuits that take too long to build. For fast connections,
  27613. this feature can cut your expected latency in half. For slow or flaky
  27614. connections, it could ruin your Tor experience. Let us know if it does!
  27615. o Major features:
  27616. - Tor now tracks how long it takes to build client-side circuits
  27617. over time, and adapts its timeout to local network performance.
  27618. Since a circuit that takes a long time to build will also provide
  27619. bad performance, we get significant latency improvements by
  27620. discarding the slowest 20% of circuits. Specifically, Tor creates
  27621. circuits more aggressively than usual until it has enough data
  27622. points for a good timeout estimate. Implements proposal 151.
  27623. We are especially looking for reports (good and bad) from users with
  27624. both EDGE and broadband connections that can move from broadband
  27625. to EDGE and find out if the build-time data in the .tor/state gets
  27626. reset without loss of Tor usability. You should also see a notice
  27627. log message telling you that Tor has reset its timeout.
  27628. - Directory authorities can now vote on arbitrary integer values as
  27629. part of the consensus process. This is designed to help set
  27630. network-wide parameters. Implements proposal 167.
  27631. - Tor now reads the "circwindow" parameter out of the consensus,
  27632. and uses that value for its circuit package window rather than the
  27633. default of 1000 cells. Begins the implementation of proposal 168.
  27634. o Major bugfixes:
  27635. - Fix a remotely triggerable memory leak when a consensus document
  27636. contains more than one signature from the same voter. Bugfix on
  27637. 0.2.0.3-alpha.
  27638. o Minor bugfixes:
  27639. - Fix an extremely rare infinite recursion bug that could occur if
  27640. we tried to log a message after shutting down the log subsystem.
  27641. Found by Matt Edman. Bugfix on 0.2.0.16-alpha.
  27642. - Fix parsing for memory or time units given without a space between
  27643. the number and the unit. Bugfix on 0.2.2.1-alpha; fixes bug 1076.
  27644. - A networkstatus vote must contain exactly one signature. Spec
  27645. conformance issue. Bugfix on 0.2.0.3-alpha.
  27646. - Fix an obscure bug where hidden services on 64-bit big-endian
  27647. systems might mis-read the timestamp in v3 introduce cells, and
  27648. refuse to connect back to the client. Discovered by "rotor".
  27649. Bugfix on 0.2.1.6-alpha.
  27650. - We were triggering a CLOCK_SKEW controller status event whenever
  27651. we connect via the v2 connection protocol to any relay that has
  27652. a wrong clock. Instead, we should only inform the controller when
  27653. it's a trusted authority that claims our clock is wrong. Bugfix
  27654. on 0.2.0.20-rc; starts to fix bug 1074. Reported by SwissTorExit.
  27655. - We were telling the controller about CHECKING_REACHABILITY and
  27656. REACHABILITY_FAILED status events whenever we launch a testing
  27657. circuit or notice that one has failed. Instead, only tell the
  27658. controller when we want to inform the user of overall success or
  27659. overall failure. Bugfix on 0.1.2.6-alpha. Fixes bug 1075. Reported
  27660. by SwissTorExit.
  27661. - Don't warn when we're using a circuit that ends with a node
  27662. excluded in ExcludeExitNodes, but the circuit is not used to access
  27663. the outside world. This should help fix bug 1090, but more problems
  27664. remain. Bugfix on 0.2.1.6-alpha.
  27665. - Work around a small memory leak in some versions of OpenSSL that
  27666. stopped the memory used by the hostname TLS extension from being
  27667. freed.
  27668. - Make our 'torify' script more portable; if we have only one of
  27669. 'torsocks' or 'tsocks' installed, don't complain to the user;
  27670. and explain our warning about tsocks better.
  27671. o Minor features:
  27672. - Add a "getinfo status/accepted-server-descriptor" controller
  27673. command, which is the recommended way for controllers to learn
  27674. whether our server descriptor has been successfully received by at
  27675. least on directory authority. Un-recommend good-server-descriptor
  27676. getinfo and status events until we have a better design for them.
  27677. - Update to the "September 4 2009" ip-to-country file.
  27678. Changes in version 0.2.2.1-alpha - 2009-08-26
  27679. Tor 0.2.2.1-alpha disables ".exit" address notation by default, allows
  27680. Tor clients to bootstrap on networks where only port 80 is reachable,
  27681. makes it more straightforward to support hardware crypto accelerators,
  27682. and starts the groundwork for gathering stats safely at relays.
  27683. o Security fixes:
  27684. - Start the process of disabling ".exit" address notation, since it
  27685. can be used for a variety of esoteric application-level attacks
  27686. on users. To reenable it, set "AllowDotExit 1" in your torrc. Fix
  27687. on 0.0.9rc5.
  27688. o New directory authorities:
  27689. - Set up urras (run by Jacob Appelbaum) as the seventh v3 directory
  27690. authority.
  27691. o Major features:
  27692. - New AccelName and AccelDir options add support for dynamic OpenSSL
  27693. hardware crypto acceleration engines.
  27694. - Tor now supports tunneling all of its outgoing connections over
  27695. a SOCKS proxy, using the SOCKS4Proxy and/or SOCKS5Proxy
  27696. configuration options. Code by Christopher Davis.
  27697. o Major bugfixes:
  27698. - Send circuit or stream sendme cells when our window has decreased
  27699. by 100 cells, not when it has decreased by 101 cells. Bug uncovered
  27700. by Karsten when testing the "reduce circuit window" performance
  27701. patch. Bugfix on the 54th commit on Tor -- from July 2002,
  27702. before the release of Tor 0.0.0. This is the new winner of the
  27703. oldest-bug prize.
  27704. o New options for gathering stats safely:
  27705. - Directory mirrors that set "DirReqStatistics 1" write statistics
  27706. about directory requests to disk every 24 hours. As compared to the
  27707. --enable-geoip-stats flag in 0.2.1.x, there are a few improvements:
  27708. 1) stats are written to disk exactly every 24 hours; 2) estimated
  27709. shares of v2 and v3 requests are determined as mean values, not at
  27710. the end of a measurement period; 3) unresolved requests are listed
  27711. with country code '??'; 4) directories also measure download times.
  27712. - Exit nodes that set "ExitPortStatistics 1" write statistics on the
  27713. number of exit streams and transferred bytes per port to disk every
  27714. 24 hours.
  27715. - Relays that set "CellStatistics 1" write statistics on how long
  27716. cells spend in their circuit queues to disk every 24 hours.
  27717. - Entry nodes that set "EntryStatistics 1" write statistics on the
  27718. rough number and origins of connecting clients to disk every 24
  27719. hours.
  27720. - Relays that write any of the above statistics to disk and set
  27721. "ExtraInfoStatistics 1" include the past 24 hours of statistics in
  27722. their extra-info documents.
  27723. o Minor features:
  27724. - New --digests command-line switch to output the digests of the
  27725. source files Tor was built with.
  27726. - The "torify" script now uses torsocks where available.
  27727. - The memarea code now uses a sentinel value at the end of each area
  27728. to make sure nothing writes beyond the end of an area. This might
  27729. help debug some conceivable causes of bug 930.
  27730. - Time and memory units in the configuration file can now be set to
  27731. fractional units. For example, "2.5 GB" is now a valid value for
  27732. AccountingMax.
  27733. - Certain Tor clients (such as those behind check.torproject.org) may
  27734. want to fetch the consensus in an extra early manner. To enable this
  27735. a user may now set FetchDirInfoExtraEarly to 1. This also depends on
  27736. setting FetchDirInfoEarly to 1. Previous behavior will stay the same
  27737. as only certain clients who must have this information sooner should
  27738. set this option.
  27739. - Instead of adding the svn revision to the Tor version string, report
  27740. the git commit (when we're building from a git checkout).
  27741. o Minor bugfixes:
  27742. - If any of the v3 certs we download are unparseable, we should
  27743. actually notice the failure so we don't retry indefinitely. Bugfix
  27744. on 0.2.0.x; reported by "rotator".
  27745. - If the cached cert file is unparseable, warn but don't exit.
  27746. - Fix possible segmentation fault on directory authorities. Bugfix on
  27747. 0.2.1.14-rc.
  27748. - When Tor fails to parse a descriptor of any kind, dump it to disk.
  27749. Might help diagnosing bug 1051.
  27750. o Deprecated and removed features:
  27751. - The controller no longer accepts the old obsolete "addr-mappings/"
  27752. or "unregistered-servers-" GETINFO values.
  27753. - Hidden services no longer publish version 0 descriptors, and clients
  27754. do not request or use version 0 descriptors. However, the old hidden
  27755. service authorities still accept and serve version 0 descriptors
  27756. when contacted by older hidden services/clients.
  27757. - The EXTENDED_EVENTS and VERBOSE_NAMES controller features are now
  27758. always on; using them is necessary for correct forward-compatible
  27759. controllers.
  27760. - Remove support for .noconnect style addresses. Nobody was using
  27761. them, and they provided another avenue for detecting Tor users
  27762. via application-level web tricks.
  27763. o Packaging changes:
  27764. - Upgrade Vidalia from 0.1.15 to 0.2.3 in the Windows and OS X
  27765. installer bundles. See
  27766. https://trac.vidalia-project.net/browser/vidalia/tags/vidalia-0.2.3/CHANGELOG
  27767. for details of what's new in Vidalia 0.2.3.
  27768. - Windows Vidalia Bundle: update Privoxy from 3.0.6 to 3.0.14-beta.
  27769. - OS X Vidalia Bundle: move to Polipo 1.0.4 with Tor specific
  27770. configuration file, rather than the old Privoxy.
  27771. - OS X Vidalia Bundle: Vidalia, Tor, and Polipo are compiled as
  27772. x86-only for better compatibility with OS X 10.6, aka Snow Leopard.
  27773. - OS X Tor Expert Bundle: Tor is compiled as x86-only for
  27774. better compatibility with OS X 10.6, aka Snow Leopard.
  27775. - OS X Vidalia Bundle: The multi-package installer is now replaced
  27776. by a simple drag and drop to the /Applications folder. This change
  27777. occurred with the upgrade to Vidalia 0.2.3.
  27778. Changes in version 0.2.1.19 - 2009-07-28
  27779. Tor 0.2.1.19 fixes a major bug with accessing and providing hidden
  27780. services on Tor 0.2.1.3-alpha through 0.2.1.18.
  27781. o Major bugfixes:
  27782. - Make accessing hidden services on 0.2.1.x work right again.
  27783. Bugfix on 0.2.1.3-alpha; workaround for bug 1038. Diagnosis and
  27784. part of patch provided by "optimist".
  27785. o Minor features:
  27786. - When a relay/bridge is writing out its identity key fingerprint to
  27787. the "fingerprint" file and to its logs, write it without spaces. Now
  27788. it will look like the fingerprints in our bridges documentation,
  27789. and confuse fewer users.
  27790. o Minor bugfixes:
  27791. - Relays no longer publish a new server descriptor if they change
  27792. their MaxAdvertisedBandwidth config option but it doesn't end up
  27793. changing their advertised bandwidth numbers. Bugfix on 0.2.0.28-rc;
  27794. fixes bug 1026. Patch from Sebastian.
  27795. - Avoid leaking memory every time we get a create cell but we have
  27796. so many already queued that we refuse it. Bugfix on 0.2.0.19-alpha;
  27797. fixes bug 1034. Reported by BarkerJr.
  27798. Changes in version 0.2.1.18 - 2009-07-24
  27799. Tor 0.2.1.18 lays the foundations for performance improvements,
  27800. adds status events to help users diagnose bootstrap problems, adds
  27801. optional authentication/authorization for hidden services, fixes a
  27802. variety of potential anonymity problems, and includes a huge pile of
  27803. other features and bug fixes.
  27804. o Build fixes:
  27805. - Add LIBS=-lrt to Makefile.am so the Tor RPMs use a static libevent.
  27806. Changes in version 0.2.1.17-rc - 2009-07-07
  27807. Tor 0.2.1.17-rc marks the fourth -- and hopefully last -- release
  27808. candidate for the 0.2.1.x series. It lays the groundwork for further
  27809. client performance improvements, and also fixes a big bug with directory
  27810. authorities that were causing them to assign Guard and Stable flags
  27811. poorly.
  27812. The Windows bundles also finally include the geoip database that we
  27813. thought we'd been shipping since 0.2.0.x (oops), and the OS X bundles
  27814. should actually install Torbutton rather than giving you a cryptic
  27815. failure message (oops).
  27816. o Major features:
  27817. - Clients now use the bandwidth values in the consensus, rather than
  27818. the bandwidth values in each relay descriptor. This approach opens
  27819. the door to more accurate bandwidth estimates once the directory
  27820. authorities start doing active measurements. Implements more of
  27821. proposal 141.
  27822. o Major bugfixes:
  27823. - When Tor clients restart after 1-5 days, they discard all their
  27824. cached descriptors as too old, but they still use the cached
  27825. consensus document. This approach is good for robustness, but
  27826. bad for performance: since they don't know any bandwidths, they
  27827. end up choosing at random rather than weighting their choice by
  27828. speed. Fixed by the above feature of putting bandwidths in the
  27829. consensus. Bugfix on 0.2.0.x.
  27830. - Directory authorities were neglecting to mark relays down in their
  27831. internal histories if the relays fall off the routerlist without
  27832. ever being found unreachable. So there were relays in the histories
  27833. that haven't been seen for eight months, and are listed as being
  27834. up for eight months. This wreaked havoc on the "median wfu"
  27835. and "median mtbf" calculations, in turn making Guard and Stable
  27836. flags very wrong, hurting network performance. Fixes bugs 696 and
  27837. 969. Bugfix on 0.2.0.6-alpha.
  27838. o Minor bugfixes:
  27839. - Serve the DirPortFrontPage page even when we have been approaching
  27840. our quotas recently. Fixes bug 1013; bugfix on 0.2.1.8-alpha.
  27841. - The control port would close the connection before flushing long
  27842. replies, such as the network consensus, if a QUIT command was issued
  27843. before the reply had completed. Now, the control port flushes all
  27844. pending replies before closing the connection. Also fixed a spurious
  27845. warning when a QUIT command is issued after a malformed or rejected
  27846. AUTHENTICATE command, but before the connection was closed. Patch
  27847. by Marcus Griep. Bugfix on 0.2.0.x; fixes bugs 1015 and 1016.
  27848. - When we can't find an intro key for a v2 hidden service descriptor,
  27849. fall back to the v0 hidden service descriptor and log a bug message.
  27850. Workaround for bug 1024.
  27851. - Fix a log message that did not respect the SafeLogging option.
  27852. Resolves bug 1027.
  27853. o Minor features:
  27854. - If we're a relay and we change our IP address, be more verbose
  27855. about the reason that made us change. Should help track down
  27856. further bugs for relays on dynamic IP addresses.
  27857. Changes in version 0.2.0.35 - 2009-06-24
  27858. o Security fix:
  27859. - Avoid crashing in the presence of certain malformed descriptors.
  27860. Found by lark, and by automated fuzzing.
  27861. - Fix an edge case where a malicious exit relay could convince a
  27862. controller that the client's DNS question resolves to an internal IP
  27863. address. Bug found and fixed by "optimist"; bugfix on 0.1.2.8-beta.
  27864. o Major bugfixes:
  27865. - Finally fix the bug where dynamic-IP relays disappear when their
  27866. IP address changes: directory mirrors were mistakenly telling
  27867. them their old address if they asked via begin_dir, so they
  27868. never got an accurate answer about their new address, so they
  27869. just vanished after a day. For belt-and-suspenders, relays that
  27870. don't set Address in their config now avoid using begin_dir for
  27871. all direct connections. Should fix bugs 827, 883, and 900.
  27872. - Fix a timing-dependent, allocator-dependent, DNS-related crash bug
  27873. that would occur on some exit nodes when DNS failures and timeouts
  27874. occurred in certain patterns. Fix for bug 957.
  27875. o Minor bugfixes:
  27876. - When starting with a cache over a few days old, do not leak
  27877. memory for the obsolete router descriptors in it. Bugfix on
  27878. 0.2.0.33; fixes bug 672.
  27879. - Hidden service clients didn't use a cached service descriptor that
  27880. was older than 15 minutes, but wouldn't fetch a new one either,
  27881. because there was already one in the cache. Now, fetch a v2
  27882. descriptor unless the same descriptor was added to the cache within
  27883. the last 15 minutes. Fixes bug 997; reported by Marcus Griep.
  27884. Changes in version 0.2.1.16-rc - 2009-06-20
  27885. Tor 0.2.1.16-rc speeds up performance for fast exit relays, and fixes
  27886. a bunch of minor bugs.
  27887. o Security fixes:
  27888. - Fix an edge case where a malicious exit relay could convince a
  27889. controller that the client's DNS question resolves to an internal IP
  27890. address. Bug found and fixed by "optimist"; bugfix on 0.1.2.8-beta.
  27891. o Major performance improvements (on 0.2.0.x):
  27892. - Disable and refactor some debugging checks that forced a linear scan
  27893. over the whole server-side DNS cache. These accounted for over 50%
  27894. of CPU time on a relatively busy exit node's gprof profile. Found
  27895. by Jacob.
  27896. - Disable some debugging checks that appeared in exit node profile
  27897. data.
  27898. o Minor features:
  27899. - Update to the "June 3 2009" ip-to-country file.
  27900. - Do not have tor-resolve automatically refuse all .onion addresses;
  27901. if AutomapHostsOnResolve is set in your torrc, this will work fine.
  27902. o Minor bugfixes (on 0.2.0.x):
  27903. - Log correct error messages for DNS-related network errors on
  27904. Windows.
  27905. - Fix a race condition that could cause crashes or memory corruption
  27906. when running as a server with a controller listening for log
  27907. messages.
  27908. - Avoid crashing when we have a policy specified in a DirPolicy or
  27909. SocksPolicy or ReachableAddresses option with ports set on it,
  27910. and we re-load the policy. May fix bug 996.
  27911. - Hidden service clients didn't use a cached service descriptor that
  27912. was older than 15 minutes, but wouldn't fetch a new one either,
  27913. because there was already one in the cache. Now, fetch a v2
  27914. descriptor unless the same descriptor was added to the cache within
  27915. the last 15 minutes. Fixes bug 997; reported by Marcus Griep.
  27916. o Minor bugfixes (on 0.2.1.x):
  27917. - Don't warn users about low port and hibernation mix when they
  27918. provide a *ListenAddress directive to fix that. Bugfix on
  27919. 0.2.1.15-rc.
  27920. - When switching back and forth between bridge mode, do not start
  27921. gathering GeoIP data until two hours have passed.
  27922. - Do not complain that the user has requested an excluded node as
  27923. an exit when the node is not really an exit. This could happen
  27924. because the circuit was for testing, or an introduction point.
  27925. Fix for bug 984.
  27926. Changes in version 0.2.1.15-rc - 2009-05-25
  27927. Tor 0.2.1.15-rc marks the second release candidate for the 0.2.1.x
  27928. series. It fixes a major bug on fast exit relays, as well as a variety
  27929. of more minor bugs.
  27930. o Major bugfixes (on 0.2.0.x):
  27931. - Fix a timing-dependent, allocator-dependent, DNS-related crash bug
  27932. that would occur on some exit nodes when DNS failures and timeouts
  27933. occurred in certain patterns. Fix for bug 957.
  27934. o Minor bugfixes (on 0.2.0.x):
  27935. - Actually return -1 in the error case for read_bandwidth_usage().
  27936. Harmless bug, since we currently don't care about the return value
  27937. anywhere. Bugfix on 0.2.0.9-alpha.
  27938. - Provide a more useful log message if bug 977 (related to buffer
  27939. freelists) ever reappears, and do not crash right away.
  27940. - Fix an assertion failure on 64-bit platforms when we allocated
  27941. memory right up to the end of a memarea, then realigned the memory
  27942. one step beyond the end. Fixes a possible cause of bug 930.
  27943. - Protect the count of open sockets with a mutex, so we can't
  27944. corrupt it when two threads are closing or opening sockets at once.
  27945. Fix for bug 939. Bugfix on 0.2.0.1-alpha.
  27946. - Don't allow a bridge to publish its router descriptor to a
  27947. non-bridge directory authority. Fixes part of bug 932.
  27948. - When we change to or from being a bridge, reset our counts of
  27949. client usage by country. Fixes bug 932.
  27950. - Fix a bug that made stream bandwidth get misreported to the
  27951. controller.
  27952. - Stop using malloc_usable_size() to use more area than we had
  27953. actually allocated: it was safe, but made valgrind really unhappy.
  27954. - Fix a memory leak when v3 directory authorities load their keys
  27955. and cert from disk. Bugfix on 0.2.0.1-alpha.
  27956. o Minor bugfixes (on 0.2.1.x):
  27957. - Fix use of freed memory when deciding to mark a non-addable
  27958. descriptor as never-downloadable. Bugfix on 0.2.1.9-alpha.
  27959. Changes in version 0.2.1.14-rc - 2009-04-12
  27960. Tor 0.2.1.14-rc marks the first release candidate for the 0.2.1.x
  27961. series. It begins fixing some major performance problems, and also
  27962. finally addresses the bug that was causing relays on dynamic IP
  27963. addresses to fall out of the directory.
  27964. o Major features:
  27965. - Clients replace entry guards that were chosen more than a few months
  27966. ago. This change should significantly improve client performance,
  27967. especially once more people upgrade, since relays that have been
  27968. a guard for a long time are currently overloaded.
  27969. o Major bugfixes (on 0.2.0):
  27970. - Finally fix the bug where dynamic-IP relays disappear when their
  27971. IP address changes: directory mirrors were mistakenly telling
  27972. them their old address if they asked via begin_dir, so they
  27973. never got an accurate answer about their new address, so they
  27974. just vanished after a day. For belt-and-suspenders, relays that
  27975. don't set Address in their config now avoid using begin_dir for
  27976. all direct connections. Should fix bugs 827, 883, and 900.
  27977. - Relays were falling out of the networkstatus consensus for
  27978. part of a day if they changed their local config but the
  27979. authorities discarded their new descriptor as "not sufficiently
  27980. different". Now directory authorities accept a descriptor as changed
  27981. if bandwidthrate or bandwidthburst changed. Partial fix for bug 962;
  27982. patch by Sebastian.
  27983. - Avoid crashing in the presence of certain malformed descriptors.
  27984. Found by lark, and by automated fuzzing.
  27985. o Minor features:
  27986. - When generating circuit events with verbose nicknames for
  27987. controllers, try harder to look up nicknames for routers on a
  27988. circuit. (Previously, we would look in the router descriptors we had
  27989. for nicknames, but not in the consensus.) Partial fix for bug 941.
  27990. - If the bridge config line doesn't specify a port, assume 443.
  27991. This makes bridge lines a bit smaller and easier for users to
  27992. understand.
  27993. - Raise the minimum bandwidth to be a relay from 20000 bytes to 20480
  27994. bytes (aka 20KB/s), to match our documentation. Also update
  27995. directory authorities so they always assign the Fast flag to relays
  27996. with 20KB/s of capacity. Now people running relays won't suddenly
  27997. find themselves not seeing any use, if the network gets faster
  27998. on average.
  27999. - Update to the "April 3 2009" ip-to-country file.
  28000. o Minor bugfixes:
  28001. - Avoid trying to print raw memory to the logs when we decide to
  28002. give up on downloading a given relay descriptor. Bugfix on
  28003. 0.2.1.9-alpha.
  28004. - In tor-resolve, when the Tor client to use is specified by
  28005. <hostname>:<port>, actually use the specified port rather than
  28006. defaulting to 9050. Bugfix on 0.2.1.6-alpha.
  28007. - Make directory usage recording work again. Bugfix on 0.2.1.6-alpha.
  28008. - When starting with a cache over a few days old, do not leak
  28009. memory for the obsolete router descriptors in it. Bugfix on
  28010. 0.2.0.33.
  28011. - Avoid double-free on list of successfully uploaded hidden
  28012. service discriptors. Fix for bug 948. Bugfix on 0.2.1.6-alpha.
  28013. - Change memarea_strndup() implementation to work even when
  28014. duplicating a string at the end of a page. This bug was
  28015. harmless for now, but could have meant crashes later. Fix by
  28016. lark. Bugfix on 0.2.1.1-alpha.
  28017. - Limit uploaded directory documents to be 16M rather than 500K.
  28018. The directory authorities were refusing v3 consensus votes from
  28019. other authorities, since the votes are now 504K. Fixes bug 959;
  28020. bugfix on 0.0.2pre17 (where we raised it from 50K to 500K ;).
  28021. - Directory authorities should never send a 503 "busy" response to
  28022. requests for votes or keys. Bugfix on 0.2.0.8-alpha; exposed by
  28023. bug 959.
  28024. Changes in version 0.2.1.13-alpha - 2009-03-09
  28025. Tor 0.2.1.13-alpha includes another big pile of minor bugfixes and
  28026. cleanups. We're finally getting close to a release candidate.
  28027. o Major bugfixes:
  28028. - Correctly update the list of which countries we exclude as
  28029. exits, when the GeoIP file is loaded or reloaded. Diagnosed by
  28030. lark. Bugfix on 0.2.1.6-alpha.
  28031. o Minor bugfixes (on 0.2.0.x and earlier):
  28032. - Automatically detect MacOSX versions earlier than 10.4.0, and
  28033. disable kqueue from inside Tor when running with these versions.
  28034. We previously did this from the startup script, but that was no
  28035. help to people who didn't use the startup script. Resolves bug 863.
  28036. - When we had picked an exit node for a connection, but marked it as
  28037. "optional", and it turned out we had no onion key for the exit,
  28038. stop wanting that exit and try again. This situation may not
  28039. be possible now, but will probably become feasible with proposal
  28040. 158. Spotted by rovv. Fixes another case of bug 752.
  28041. - Clients no longer cache certificates for authorities they do not
  28042. recognize. Bugfix on 0.2.0.9-alpha.
  28043. - When we can't transmit a DNS request due to a network error, retry
  28044. it after a while, and eventually transmit a failing response to
  28045. the RESOLVED cell. Bugfix on 0.1.2.5-alpha.
  28046. - If the controller claimed responsibility for a stream, but that
  28047. stream never finished making its connection, it would live
  28048. forever in circuit_wait state. Now we close it after SocksTimeout
  28049. seconds. Bugfix on 0.1.2.7-alpha; reported by Mike Perry.
  28050. - Drop begin cells to a hidden service if they come from the middle
  28051. of a circuit. Patch from lark.
  28052. - When we erroneously receive two EXTEND cells for the same circuit
  28053. ID on the same connection, drop the second. Patch from lark.
  28054. - Fix a crash that occurs on exit nodes when a nameserver request
  28055. timed out. Bugfix on 0.1.2.1-alpha; our CLEAR debugging code had
  28056. been suppressing the bug since 0.1.2.10-alpha. Partial fix for
  28057. bug 929.
  28058. - Do not assume that a stack-allocated character array will be
  28059. 64-bit aligned on platforms that demand that uint64_t access is
  28060. aligned. Possible fix for bug 604.
  28061. - Parse dates and IPv4 addresses in a locale- and libc-independent
  28062. manner, to avoid platform-dependent behavior on malformed input.
  28063. - Build correctly when configured to build outside the main source
  28064. path. Patch from Michael Gold.
  28065. - We were already rejecting relay begin cells with destination port
  28066. of 0. Now also reject extend cells with destination port or address
  28067. of 0. Suggested by lark.
  28068. o Minor bugfixes (on 0.2.1.x):
  28069. - Don't re-extend introduction circuits if we ran out of RELAY_EARLY
  28070. cells. Bugfix on 0.2.1.3-alpha. Fixes more of bug 878.
  28071. - If we're an exit node, scrub the IP address to which we are exiting
  28072. in the logs. Bugfix on 0.2.1.8-alpha.
  28073. o Minor features:
  28074. - On Linux, use the prctl call to re-enable core dumps when the user
  28075. is option is set.
  28076. - New controller event NEWCONSENSUS that lists the networkstatus
  28077. lines for every recommended relay. Now controllers like Torflow
  28078. can keep up-to-date on which relays they should be using.
  28079. - Update to the "February 26 2009" ip-to-country file.
  28080. Changes in version 0.2.0.34 - 2009-02-08
  28081. Tor 0.2.0.34 features several more security-related fixes. You should
  28082. upgrade, especially if you run an exit relay (remote crash) or a
  28083. directory authority (remote infinite loop), or you're on an older
  28084. (pre-XP) or not-recently-patched Windows (remote exploit).
  28085. This release marks end-of-life for Tor 0.1.2.x. Those Tor versions
  28086. have many known flaws, and nobody should be using them. You should
  28087. upgrade. If you're using a Linux or BSD and its packages are obsolete,
  28088. stop using those packages and upgrade anyway.
  28089. o Security fixes:
  28090. - Fix an infinite-loop bug on handling corrupt votes under certain
  28091. circumstances. Bugfix on 0.2.0.8-alpha.
  28092. - Fix a temporary DoS vulnerability that could be performed by
  28093. a directory mirror. Bugfix on 0.2.0.9-alpha; reported by lark.
  28094. - Avoid a potential crash on exit nodes when processing malformed
  28095. input. Remote DoS opportunity. Bugfix on 0.2.0.33.
  28096. - Do not accept incomplete ipv4 addresses (like 192.168.0) as valid.
  28097. Spec conformance issue. Bugfix on Tor 0.0.2pre27.
  28098. o Minor bugfixes:
  28099. - Fix compilation on systems where time_t is a 64-bit integer.
  28100. Patch from Matthias Drochner.
  28101. - Don't consider expiring already-closed client connections. Fixes
  28102. bug 893. Bugfix on 0.0.2pre20.
  28103. Changes in version 0.2.1.12-alpha - 2009-02-08
  28104. Tor 0.2.1.12-alpha features several more security-related fixes. You
  28105. should upgrade, especially if you run an exit relay (remote crash) or
  28106. a directory authority (remote infinite loop), or you're on an older
  28107. (pre-XP) or not-recently-patched Windows (remote exploit). It also
  28108. includes a big pile of minor bugfixes and cleanups.
  28109. o Security fixes:
  28110. - Fix an infinite-loop bug on handling corrupt votes under certain
  28111. circumstances. Bugfix on 0.2.0.8-alpha.
  28112. - Fix a temporary DoS vulnerability that could be performed by
  28113. a directory mirror. Bugfix on 0.2.0.9-alpha; reported by lark.
  28114. - Avoid a potential crash on exit nodes when processing malformed
  28115. input. Remote DoS opportunity. Bugfix on 0.2.1.7-alpha.
  28116. o Minor bugfixes:
  28117. - Let controllers actually ask for the "clients_seen" event for
  28118. getting usage summaries on bridge relays. Bugfix on 0.2.1.10-alpha;
  28119. reported by Matt Edman.
  28120. - Fix a compile warning on OSX Panther. Fixes bug 913; bugfix against
  28121. 0.2.1.11-alpha.
  28122. - Fix a bug in address parsing that was preventing bridges or hidden
  28123. service targets from being at IPv6 addresses.
  28124. - Solve a bug that kept hardware crypto acceleration from getting
  28125. enabled when accounting was turned on. Fixes bug 907. Bugfix on
  28126. 0.0.9pre6.
  28127. - Remove a bash-ism from configure.in to build properly on non-Linux
  28128. platforms. Bugfix on 0.2.1.1-alpha.
  28129. - Fix code so authorities _actually_ send back X-Descriptor-Not-New
  28130. headers. Bugfix on 0.2.0.10-alpha.
  28131. - Don't consider expiring already-closed client connections. Fixes
  28132. bug 893. Bugfix on 0.0.2pre20.
  28133. - Fix another interesting corner-case of bug 891 spotted by rovv:
  28134. Previously, if two hosts had different amounts of clock drift, and
  28135. one of them created a new connection with just the wrong timing,
  28136. the other might decide to deprecate the new connection erroneously.
  28137. Bugfix on 0.1.1.13-alpha.
  28138. - Resolve a very rare crash bug that could occur when the user forced
  28139. a nameserver reconfiguration during the middle of a nameserver
  28140. probe. Fixes bug 526. Bugfix on 0.1.2.1-alpha.
  28141. - Support changing value of ServerDNSRandomizeCase during SIGHUP.
  28142. Bugfix on 0.2.1.7-alpha.
  28143. - If we're using bridges and our network goes away, be more willing
  28144. to forgive our bridges and try again when we get an application
  28145. request. Bugfix on 0.2.0.x.
  28146. o Minor features:
  28147. - Support platforms where time_t is 64 bits long. (Congratulations,
  28148. NetBSD!) Patch from Matthias Drochner.
  28149. - Add a 'getinfo status/clients-seen' controller command, in case
  28150. controllers want to hear clients_seen events but connect late.
  28151. o Build changes:
  28152. - Disable GCC's strict alias optimization by default, to avoid the
  28153. likelihood of its introducing subtle bugs whenever our code violates
  28154. the letter of C99's alias rules.
  28155. Changes in version 0.2.0.33 - 2009-01-21
  28156. Tor 0.2.0.33 fixes a variety of bugs that were making relays less
  28157. useful to users. It also finally fixes a bug where a relay or client
  28158. that's been off for many days would take a long time to bootstrap.
  28159. This update also fixes an important security-related bug reported by
  28160. Ilja van Sprundel. You should upgrade. (We'll send out more details
  28161. about the bug once people have had some time to upgrade.)
  28162. o Security fixes:
  28163. - Fix a heap-corruption bug that may be remotely triggerable on
  28164. some platforms. Reported by Ilja van Sprundel.
  28165. o Major bugfixes:
  28166. - When a stream at an exit relay is in state "resolving" or
  28167. "connecting" and it receives an "end" relay cell, the exit relay
  28168. would silently ignore the end cell and not close the stream. If
  28169. the client never closes the circuit, then the exit relay never
  28170. closes the TCP connection. Bug introduced in Tor 0.1.2.1-alpha;
  28171. reported by "wood".
  28172. - When sending CREATED cells back for a given circuit, use a 64-bit
  28173. connection ID to find the right connection, rather than an addr:port
  28174. combination. Now that we can have multiple OR connections between
  28175. the same ORs, it is no longer possible to use addr:port to uniquely
  28176. identify a connection.
  28177. - Bridge relays that had DirPort set to 0 would stop fetching
  28178. descriptors shortly after startup, and then briefly resume
  28179. after a new bandwidth test and/or after publishing a new bridge
  28180. descriptor. Bridge users that try to bootstrap from them would
  28181. get a recent networkstatus but would get descriptors from up to
  28182. 18 hours earlier, meaning most of the descriptors were obsolete
  28183. already. Reported by Tas; bugfix on 0.2.0.13-alpha.
  28184. - Prevent bridge relays from serving their 'extrainfo' document
  28185. to anybody who asks, now that extrainfo docs include potentially
  28186. sensitive aggregated client geoip summaries. Bugfix on
  28187. 0.2.0.13-alpha.
  28188. - If the cached networkstatus consensus is more than five days old,
  28189. discard it rather than trying to use it. In theory it could be
  28190. useful because it lists alternate directory mirrors, but in practice
  28191. it just means we spend many minutes trying directory mirrors that
  28192. are long gone from the network. Also discard router descriptors as
  28193. we load them if they are more than five days old, since the onion
  28194. key is probably wrong by now. Bugfix on 0.2.0.x. Fixes bug 887.
  28195. o Minor bugfixes:
  28196. - Do not mark smartlist_bsearch_idx() function as ATTR_PURE. This bug
  28197. could make gcc generate non-functional binary search code. Bugfix
  28198. on 0.2.0.10-alpha.
  28199. - Build correctly on platforms without socklen_t.
  28200. - Compile without warnings on solaris.
  28201. - Avoid potential crash on internal error during signature collection.
  28202. Fixes bug 864. Patch from rovv.
  28203. - Correct handling of possible malformed authority signing key
  28204. certificates with internal signature types. Fixes bug 880.
  28205. Bugfix on 0.2.0.3-alpha.
  28206. - Fix a hard-to-trigger resource leak when logging credential status.
  28207. CID 349.
  28208. - When we can't initialize DNS because the network is down, do not
  28209. automatically stop Tor from starting. Instead, we retry failed
  28210. dns_init() every 10 minutes, and change the exit policy to reject
  28211. *:* until one succeeds. Fixes bug 691.
  28212. - Use 64 bits instead of 32 bits for connection identifiers used with
  28213. the controller protocol, to greatly reduce risk of identifier reuse.
  28214. - When we're choosing an exit node for a circuit, and we have
  28215. no pending streams, choose a good general exit rather than one that
  28216. supports "all the pending streams". Bugfix on 0.1.1.x. Fix by rovv.
  28217. - Fix another case of assuming, when a specific exit is requested,
  28218. that we know more than the user about what hosts it allows.
  28219. Fixes one case of bug 752. Patch from rovv.
  28220. - Clip the MaxCircuitDirtiness config option to a minimum of 10
  28221. seconds. Warn the user if lower values are given in the
  28222. configuration. Bugfix on 0.1.0.1-rc. Patch by Sebastian.
  28223. - Clip the CircuitBuildTimeout to a minimum of 30 seconds. Warn the
  28224. user if lower values are given in the configuration. Bugfix on
  28225. 0.1.1.17-rc. Patch by Sebastian.
  28226. - Fix a memory leak when we decline to add a v2 rendezvous descriptor to
  28227. the cache because we already had a v0 descriptor with the same ID.
  28228. Bugfix on 0.2.0.18-alpha.
  28229. - Fix a race condition when freeing keys shared between main thread
  28230. and CPU workers that could result in a memory leak. Bugfix on
  28231. 0.1.0.1-rc. Fixes bug 889.
  28232. - Send a valid END cell back when a client tries to connect to a
  28233. nonexistent hidden service port. Bugfix on 0.1.2.15. Fixes bug
  28234. 840. Patch from rovv.
  28235. - Check which hops rendezvous stream cells are associated with to
  28236. prevent possible guess-the-streamid injection attacks from
  28237. intermediate hops. Fixes another case of bug 446. Based on patch
  28238. from rovv.
  28239. - If a broken client asks a non-exit router to connect somewhere,
  28240. do not even do the DNS lookup before rejecting the connection.
  28241. Fixes another case of bug 619. Patch from rovv.
  28242. - When a relay gets a create cell it can't decrypt (e.g. because it's
  28243. using the wrong onion key), we were dropping it and letting the
  28244. client time out. Now actually answer with a destroy cell. Fixes
  28245. bug 904. Bugfix on 0.0.2pre8.
  28246. o Minor bugfixes (hidden services):
  28247. - Do not throw away existing introduction points on SIGHUP. Bugfix on
  28248. 0.0.6pre1. Patch by Karsten. Fixes bug 874.
  28249. o Minor features:
  28250. - Report the case where all signatures in a detached set are rejected
  28251. differently than the case where there is an error handling the
  28252. detached set.
  28253. - When we realize that another process has modified our cached
  28254. descriptors, print out a more useful error message rather than
  28255. triggering an assertion. Fixes bug 885. Patch from Karsten.
  28256. - Implement the 0x20 hack to better resist DNS poisoning: set the
  28257. case on outgoing DNS requests randomly, and reject responses that do
  28258. not match the case correctly. This logic can be disabled with the
  28259. ServerDNSRandomizeCase setting, if you are using one of the 0.3%
  28260. of servers that do not reliably preserve case in replies. See
  28261. "Increased DNS Forgery Resistance through 0x20-Bit Encoding"
  28262. for more info.
  28263. - Check DNS replies for more matching fields to better resist DNS
  28264. poisoning.
  28265. - Never use OpenSSL compression: it wastes RAM and CPU trying to
  28266. compress cells, which are basically all encrypted, compressed, or
  28267. both.
  28268. Changes in version 0.2.1.11-alpha - 2009-01-20
  28269. Tor 0.2.1.11-alpha finishes fixing the "if your Tor is off for a
  28270. week it will take a long time to bootstrap again" bug. It also fixes
  28271. an important security-related bug reported by Ilja van Sprundel. You
  28272. should upgrade. (We'll send out more details about the bug once people
  28273. have had some time to upgrade.)
  28274. o Security fixes:
  28275. - Fix a heap-corruption bug that may be remotely triggerable on
  28276. some platforms. Reported by Ilja van Sprundel.
  28277. o Major bugfixes:
  28278. - Discard router descriptors as we load them if they are more than
  28279. five days old. Otherwise if Tor is off for a long time and then
  28280. starts with cached descriptors, it will try to use the onion
  28281. keys in those obsolete descriptors when building circuits. Bugfix
  28282. on 0.2.0.x. Fixes bug 887.
  28283. o Minor features:
  28284. - Try to make sure that the version of Libevent we're running with
  28285. is binary-compatible with the one we built with. May address bug
  28286. 897 and others.
  28287. - Make setting ServerDNSRandomizeCase to 0 actually work. Bugfix
  28288. for bug 905. Bugfix on 0.2.1.7-alpha.
  28289. - Add a new --enable-local-appdata configuration switch to change
  28290. the default location of the datadir on win32 from APPDATA to
  28291. LOCAL_APPDATA. In the future, we should migrate to LOCAL_APPDATA
  28292. entirely. Patch from coderman.
  28293. o Minor bugfixes:
  28294. - Make outbound DNS packets respect the OutboundBindAddress setting.
  28295. Fixes the bug part of bug 798. Bugfix on 0.1.2.2-alpha.
  28296. - When our circuit fails at the first hop (e.g. we get a destroy
  28297. cell back), avoid using that OR connection anymore, and also
  28298. tell all the one-hop directory requests waiting for it that they
  28299. should fail. Bugfix on 0.2.1.3-alpha.
  28300. - In the torify(1) manpage, mention that tsocks will leak your
  28301. DNS requests.
  28302. Changes in version 0.2.1.10-alpha - 2009-01-06
  28303. Tor 0.2.1.10-alpha fixes two major bugs in bridge relays (one that
  28304. would make the bridge relay not so useful if it had DirPort set to 0,
  28305. and one that could let an attacker learn a little bit of information
  28306. about the bridge's users), and a bug that would cause your Tor relay
  28307. to ignore a circuit create request it can't decrypt (rather than reply
  28308. with an error). It also fixes a wide variety of other bugs.
  28309. o Major bugfixes:
  28310. - If the cached networkstatus consensus is more than five days old,
  28311. discard it rather than trying to use it. In theory it could
  28312. be useful because it lists alternate directory mirrors, but in
  28313. practice it just means we spend many minutes trying directory
  28314. mirrors that are long gone from the network. Helps bug 887 a bit;
  28315. bugfix on 0.2.0.x.
  28316. - Bridge relays that had DirPort set to 0 would stop fetching
  28317. descriptors shortly after startup, and then briefly resume
  28318. after a new bandwidth test and/or after publishing a new bridge
  28319. descriptor. Bridge users that try to bootstrap from them would
  28320. get a recent networkstatus but would get descriptors from up to
  28321. 18 hours earlier, meaning most of the descriptors were obsolete
  28322. already. Reported by Tas; bugfix on 0.2.0.13-alpha.
  28323. - Prevent bridge relays from serving their 'extrainfo' document
  28324. to anybody who asks, now that extrainfo docs include potentially
  28325. sensitive aggregated client geoip summaries. Bugfix on
  28326. 0.2.0.13-alpha.
  28327. o Minor features:
  28328. - New controller event "clients_seen" to report a geoip-based summary
  28329. of which countries we've seen clients from recently. Now controllers
  28330. like Vidalia can show bridge operators that they're actually making
  28331. a difference.
  28332. - Build correctly against versions of OpenSSL 0.9.8 or later built
  28333. without support for deprecated functions.
  28334. - Update to the "December 19 2008" ip-to-country file.
  28335. o Minor bugfixes (on 0.2.0.x):
  28336. - Authorities now vote for the Stable flag for any router whose
  28337. weighted MTBF is at least 5 days, regardless of the mean MTBF.
  28338. - Do not remove routers as too old if we do not have any consensus
  28339. document. Bugfix on 0.2.0.7-alpha.
  28340. - Do not accept incomplete ipv4 addresses (like 192.168.0) as valid.
  28341. Spec conformance issue. Bugfix on Tor 0.0.2pre27.
  28342. - When an exit relay resolves a stream address to a local IP address,
  28343. do not just keep retrying that same exit relay over and
  28344. over. Instead, just close the stream. Addresses bug 872. Bugfix
  28345. on 0.2.0.32. Patch from rovv.
  28346. - If a hidden service sends us an END cell, do not consider
  28347. retrying the connection; just close it. Patch from rovv.
  28348. - When we made bridge authorities stop serving bridge descriptors over
  28349. unencrypted links, we also broke DirPort reachability testing for
  28350. bridges. So bridges with a non-zero DirPort were printing spurious
  28351. warns to their logs. Bugfix on 0.2.0.16-alpha. Fixes bug 709.
  28352. - When a relay gets a create cell it can't decrypt (e.g. because it's
  28353. using the wrong onion key), we were dropping it and letting the
  28354. client time out. Now actually answer with a destroy cell. Fixes
  28355. bug 904. Bugfix on 0.0.2pre8.
  28356. - Squeeze 2-5% out of client performance (according to oprofile) by
  28357. improving the implementation of some policy-manipulation functions.
  28358. o Minor bugfixes (on 0.2.1.x):
  28359. - Make get_interface_address() function work properly again; stop
  28360. guessing the wrong parts of our address as our address.
  28361. - Do not cannibalize a circuit if we're out of RELAY_EARLY cells to
  28362. send on that circuit. Otherwise we might violate the proposal-110
  28363. limit. Bugfix on 0.2.1.3-alpha. Partial fix for bug 878. Diagnosis
  28364. thanks to Karsten.
  28365. - When we're sending non-EXTEND cells to the first hop in a circuit,
  28366. for example to use an encrypted directory connection, we don't need
  28367. to use RELAY_EARLY cells: the first hop knows what kind of cell
  28368. it is, and nobody else can even see the cell type. Conserving
  28369. RELAY_EARLY cells makes it easier to cannibalize circuits like
  28370. this later.
  28371. - Stop logging nameserver addresses in reverse order.
  28372. - If we are retrying a directory download slowly over and over, do
  28373. not automatically give up after the 254th failure. Bugfix on
  28374. 0.2.1.9-alpha.
  28375. - Resume reporting accurate "stream end" reasons to the local control
  28376. port. They were lost in the changes for Proposal 148. Bugfix on
  28377. 0.2.1.9-alpha.
  28378. o Deprecated and removed features:
  28379. - The old "tor --version --version" command, which would print out
  28380. the subversion "Id" of most of the source files, is now removed. It
  28381. turned out to be less useful than we'd expected, and harder to
  28382. maintain.
  28383. o Code simplifications and refactoring:
  28384. - Change our header file guard macros to be less likely to conflict
  28385. with system headers. Adam Langley noticed that we were conflicting
  28386. with log.h on Android.
  28387. - Tool-assisted documentation cleanup. Nearly every function or
  28388. static variable in Tor should have its own documentation now.
  28389. Changes in version 0.2.1.9-alpha - 2008-12-25
  28390. Tor 0.2.1.9-alpha fixes many more bugs, some of them security-related.
  28391. o New directory authorities:
  28392. - gabelmoo (the authority run by Karsten Loesing) now has a new
  28393. IP address.
  28394. o Security fixes:
  28395. - Never use a connection with a mismatched address to extend a
  28396. circuit, unless that connection is canonical. A canonical
  28397. connection is one whose address is authenticated by the router's
  28398. identity key, either in a NETINFO cell or in a router descriptor.
  28399. - Avoid a possible memory corruption bug when receiving hidden service
  28400. descriptors. Bugfix on 0.2.1.6-alpha.
  28401. o Major bugfixes:
  28402. - Fix a logic error that would automatically reject all but the first
  28403. configured DNS server. Bugfix on 0.2.1.5-alpha. Possible fix for
  28404. part of bug 813/868. Bug spotted by coderman.
  28405. - When a stream at an exit relay is in state "resolving" or
  28406. "connecting" and it receives an "end" relay cell, the exit relay
  28407. would silently ignore the end cell and not close the stream. If
  28408. the client never closes the circuit, then the exit relay never
  28409. closes the TCP connection. Bug introduced in 0.1.2.1-alpha;
  28410. reported by "wood".
  28411. - When we can't initialize DNS because the network is down, do not
  28412. automatically stop Tor from starting. Instead, retry failed
  28413. dns_init() every 10 minutes, and change the exit policy to reject
  28414. *:* until one succeeds. Fixes bug 691.
  28415. o Minor features:
  28416. - Give a better error message when an overzealous init script says
  28417. "sudo -u username tor --user username". Makes Bug 882 easier for
  28418. users to diagnose.
  28419. - When a directory authority gives us a new guess for our IP address,
  28420. log which authority we used. Hopefully this will help us debug
  28421. the recent complaints about bad IP address guesses.
  28422. - Detect svn revision properly when we're using git-svn.
  28423. - Try not to open more than one descriptor-downloading connection
  28424. to an authority at once. This should reduce load on directory
  28425. authorities. Fixes bug 366.
  28426. - Add cross-certification to newly generated certificates, so that
  28427. a signing key is enough information to look up a certificate.
  28428. Partial implementation of proposal 157.
  28429. - Start serving certificates by <identity digest, signing key digest>
  28430. pairs. Partial implementation of proposal 157.
  28431. - Clients now never report any stream end reason except 'MISC'.
  28432. Implements proposal 148.
  28433. - On platforms with a maximum syslog string length, truncate syslog
  28434. messages to that length ourselves, rather than relying on the
  28435. system to do it for us.
  28436. - Optimize out calls to time(NULL) that occur for every IO operation,
  28437. or for every cell. On systems where time() is a slow syscall,
  28438. this fix will be slightly helpful.
  28439. - Exit servers can now answer resolve requests for ip6.arpa addresses.
  28440. - When we download a descriptor that we then immediately (as
  28441. a directory authority) reject, do not retry downloading it right
  28442. away. Should save some bandwidth on authorities. Fix for bug
  28443. 888. Patch by Sebastian Hahn.
  28444. - When a download gets us zero good descriptors, do not notify
  28445. Tor that new directory information has arrived.
  28446. - Avoid some nasty corner cases in the logic for marking connections
  28447. as too old or obsolete or noncanonical for circuits. Partial
  28448. bugfix on bug 891.
  28449. o Minor features (controller):
  28450. - New CONSENSUS_ARRIVED event to note when a new consensus has
  28451. been fetched and validated.
  28452. - When we realize that another process has modified our cached
  28453. descriptors file, print out a more useful error message rather
  28454. than triggering an assertion. Fixes bug 885. Patch from Karsten.
  28455. - Add an internal-use-only __ReloadTorrcOnSIGHUP option for
  28456. controllers to prevent SIGHUP from reloading the
  28457. configuration. Fixes bug 856.
  28458. o Minor bugfixes:
  28459. - Resume using the correct "REASON=" stream when telling the
  28460. controller why we closed a stream. Bugfix in 0.2.1.1-alpha.
  28461. - When a canonical connection appears later in our internal list
  28462. than a noncanonical one for a given OR ID, always use the
  28463. canonical one. Bugfix on 0.2.0.12-alpha. Fixes bug 805.
  28464. Spotted by rovv.
  28465. - Clip the MaxCircuitDirtiness config option to a minimum of 10
  28466. seconds. Warn the user if lower values are given in the
  28467. configuration. Bugfix on 0.1.0.1-rc. Patch by Sebastian.
  28468. - Clip the CircuitBuildTimeout to a minimum of 30 seconds. Warn the
  28469. user if lower values are given in the configuration. Bugfix on
  28470. 0.1.1.17-rc. Patch by Sebastian.
  28471. - Fix a race condition when freeing keys shared between main thread
  28472. and CPU workers that could result in a memory leak. Bugfix on
  28473. 0.1.0.1-rc. Fixes bug 889.
  28474. o Minor bugfixes (hidden services):
  28475. - Do not throw away existing introduction points on SIGHUP (bugfix on
  28476. 0.0.6pre1); also, do not stall hidden services because we're
  28477. throwing away introduction points; bugfix on 0.2.1.7-alpha. Spotted
  28478. by John Brooks. Patch by Karsten. Fixes bug 874.
  28479. - Fix a memory leak when we decline to add a v2 rendezvous
  28480. descriptor to the cache because we already had a v0 descriptor
  28481. with the same ID. Bugfix on 0.2.0.18-alpha.
  28482. o Deprecated and removed features:
  28483. - RedirectExits has been removed. It was deprecated since
  28484. 0.2.0.3-alpha.
  28485. - Finally remove deprecated "EXTENDED_FORMAT" controller feature. It
  28486. has been called EXTENDED_EVENTS since 0.1.2.4-alpha.
  28487. - Cell pools are now always enabled; --disable-cell-pools is ignored.
  28488. o Code simplifications and refactoring:
  28489. - Rename the confusing or_is_obsolete field to the more appropriate
  28490. is_bad_for_new_circs, and move it to or_connection_t where it
  28491. belongs.
  28492. - Move edge-only flags from connection_t to edge_connection_t: not
  28493. only is this better coding, but on machines of plausible alignment,
  28494. it should save 4-8 bytes per connection_t. "Every little bit helps."
  28495. - Rename ServerDNSAllowBrokenResolvConf to ServerDNSAllowBrokenConfig
  28496. for consistency; keep old option working for backward compatibility.
  28497. - Simplify the code for finding connections to use for a circuit.
  28498. Changes in version 0.2.1.8-alpha - 2008-12-08
  28499. Tor 0.2.1.8-alpha fixes some crash bugs in earlier alpha releases,
  28500. builds better on unusual platforms like Solaris and old OS X, and
  28501. fixes a variety of other issues.
  28502. o Major features:
  28503. - New DirPortFrontPage option that takes an html file and publishes
  28504. it as "/" on the DirPort. Now relay operators can provide a
  28505. disclaimer without needing to set up a separate webserver. There's
  28506. a sample disclaimer in contrib/tor-exit-notice.html.
  28507. o Security fixes:
  28508. - When the client is choosing entry guards, now it selects at most
  28509. one guard from a given relay family. Otherwise we could end up with
  28510. all of our entry points into the network run by the same operator.
  28511. Suggested by Camilo Viecco. Fix on 0.1.1.11-alpha.
  28512. o Major bugfixes:
  28513. - Fix a DOS opportunity during the voting signature collection process
  28514. at directory authorities. Spotted by rovv. Bugfix on 0.2.0.x.
  28515. - Fix a possible segfault when establishing an exit connection. Bugfix
  28516. on 0.2.1.5-alpha.
  28517. o Minor bugfixes:
  28518. - Get file locking working on win32. Bugfix on 0.2.1.6-alpha. Fixes
  28519. bug 859.
  28520. - Made Tor a little less aggressive about deleting expired
  28521. certificates. Partial fix for bug 854.
  28522. - Stop doing unaligned memory access that generated bus errors on
  28523. sparc64. Bugfix on 0.2.0.10-alpha. Fix for bug 862.
  28524. - Fix a crash bug when changing EntryNodes from the controller. Bugfix
  28525. on 0.2.1.6-alpha. Fix for bug 867. Patched by Sebastian.
  28526. - Make USR2 log-level switch take effect immediately. Bugfix on
  28527. 0.1.2.8-beta.
  28528. - If one win32 nameserver fails to get added, continue adding the
  28529. rest, and don't automatically fail.
  28530. - Use fcntl() for locking when flock() is not available. Should fix
  28531. compilation on Solaris. Should fix Bug 873. Bugfix on 0.2.1.6-alpha.
  28532. - Do not mark smartlist_bsearch_idx() function as ATTR_PURE. This bug
  28533. could make gcc generate non-functional binary search code. Bugfix
  28534. on 0.2.0.10-alpha.
  28535. - Build correctly on platforms without socklen_t.
  28536. - Avoid potential crash on internal error during signature collection.
  28537. Fixes bug 864. Patch from rovv.
  28538. - Do not use C's stdio library for writing to log files. This will
  28539. improve logging performance by a minute amount, and will stop
  28540. leaking fds when our disk is full. Fixes bug 861.
  28541. - Stop erroneous use of O_APPEND in cases where we did not in fact
  28542. want to re-seek to the end of a file before every last write().
  28543. - Correct handling of possible malformed authority signing key
  28544. certificates with internal signature types. Fixes bug 880. Bugfix
  28545. on 0.2.0.3-alpha.
  28546. - Fix a hard-to-trigger resource leak when logging credential status.
  28547. CID 349.
  28548. o Minor features:
  28549. - Directory mirrors no longer fetch the v1 directory or
  28550. running-routers files. They are obsolete, and nobody asks for them
  28551. anymore. This is the first step to making v1 authorities obsolete.
  28552. o Minor features (controller):
  28553. - Return circuit purposes in response to GETINFO circuit-status. Fixes
  28554. bug 858.
  28555. Changes in version 0.2.0.32 - 2008-11-20
  28556. Tor 0.2.0.32 fixes a major security problem in Debian and Ubuntu
  28557. packages (and maybe other packages) noticed by Theo de Raadt, fixes
  28558. a smaller security flaw that might allow an attacker to access local
  28559. services, further improves hidden service performance, and fixes a
  28560. variety of other issues.
  28561. o Security fixes:
  28562. - The "User" and "Group" config options did not clear the
  28563. supplementary group entries for the Tor process. The "User" option
  28564. is now more robust, and we now set the groups to the specified
  28565. user's primary group. The "Group" option is now ignored. For more
  28566. detailed logging on credential switching, set CREDENTIAL_LOG_LEVEL
  28567. in common/compat.c to LOG_NOTICE or higher. Patch by Jacob Appelbaum
  28568. and Steven Murdoch. Bugfix on 0.0.2pre14. Fixes bug 848 and 857.
  28569. - The "ClientDNSRejectInternalAddresses" config option wasn't being
  28570. consistently obeyed: if an exit relay refuses a stream because its
  28571. exit policy doesn't allow it, we would remember what IP address
  28572. the relay said the destination address resolves to, even if it's
  28573. an internal IP address. Bugfix on 0.2.0.7-alpha; patch by rovv.
  28574. o Major bugfixes:
  28575. - Fix a DOS opportunity during the voting signature collection process
  28576. at directory authorities. Spotted by rovv. Bugfix on 0.2.0.x.
  28577. o Major bugfixes (hidden services):
  28578. - When fetching v0 and v2 rendezvous service descriptors in parallel,
  28579. we were failing the whole hidden service request when the v0
  28580. descriptor fetch fails, even if the v2 fetch is still pending and
  28581. might succeed. Similarly, if the last v2 fetch fails, we were
  28582. failing the whole hidden service request even if a v0 fetch is
  28583. still pending. Fixes bug 814. Bugfix on 0.2.0.10-alpha.
  28584. - When extending a circuit to a hidden service directory to upload a
  28585. rendezvous descriptor using a BEGIN_DIR cell, almost 1/6 of all
  28586. requests failed, because the router descriptor has not been
  28587. downloaded yet. In these cases, do not attempt to upload the
  28588. rendezvous descriptor, but wait until the router descriptor is
  28589. downloaded and retry. Likewise, do not attempt to fetch a rendezvous
  28590. descriptor from a hidden service directory for which the router
  28591. descriptor has not yet been downloaded. Fixes bug 767. Bugfix
  28592. on 0.2.0.10-alpha.
  28593. o Minor bugfixes:
  28594. - Fix several infrequent memory leaks spotted by Coverity.
  28595. - When testing for libevent functions, set the LDFLAGS variable
  28596. correctly. Found by Riastradh.
  28597. - Avoid a bug where the FastFirstHopPK 0 option would keep Tor from
  28598. bootstrapping with tunneled directory connections. Bugfix on
  28599. 0.1.2.5-alpha. Fixes bug 797. Found by Erwin Lam.
  28600. - When asked to connect to A.B.exit:80, if we don't know the IP for A
  28601. and we know that server B rejects most-but-not all connections to
  28602. port 80, we would previously reject the connection. Now, we assume
  28603. the user knows what they were asking for. Fixes bug 752. Bugfix
  28604. on 0.0.9rc5. Diagnosed by BarkerJr.
  28605. - If we overrun our per-second write limits a little, count this as
  28606. having used up our write allocation for the second, and choke
  28607. outgoing directory writes. Previously, we had only counted this when
  28608. we had met our limits precisely. Fixes bug 824. Patch from by rovv.
  28609. Bugfix on 0.2.0.x (??).
  28610. - Remove the old v2 directory authority 'lefkada' from the default
  28611. list. It has been gone for many months.
  28612. - Stop doing unaligned memory access that generated bus errors on
  28613. sparc64. Bugfix on 0.2.0.10-alpha. Fixes bug 862.
  28614. - Make USR2 log-level switch take effect immediately. Bugfix on
  28615. 0.1.2.8-beta.
  28616. o Minor bugfixes (controller):
  28617. - Make DNS resolved events into "CLOSED", not "FAILED". Bugfix on
  28618. 0.1.2.5-alpha. Fix by Robert Hogan. Resolves bug 807.
  28619. Changes in version 0.2.1.7-alpha - 2008-11-08
  28620. Tor 0.2.1.7-alpha fixes a major security problem in Debian and Ubuntu
  28621. packages (and maybe other packages) noticed by Theo de Raadt, fixes
  28622. a smaller security flaw that might allow an attacker to access local
  28623. services, adds better defense against DNS poisoning attacks on exit
  28624. relays, further improves hidden service performance, and fixes a
  28625. variety of other issues.
  28626. o Security fixes:
  28627. - The "ClientDNSRejectInternalAddresses" config option wasn't being
  28628. consistently obeyed: if an exit relay refuses a stream because its
  28629. exit policy doesn't allow it, we would remember what IP address
  28630. the relay said the destination address resolves to, even if it's
  28631. an internal IP address. Bugfix on 0.2.0.7-alpha; patch by rovv.
  28632. - The "User" and "Group" config options did not clear the
  28633. supplementary group entries for the Tor process. The "User" option
  28634. is now more robust, and we now set the groups to the specified
  28635. user's primary group. The "Group" option is now ignored. For more
  28636. detailed logging on credential switching, set CREDENTIAL_LOG_LEVEL
  28637. in common/compat.c to LOG_NOTICE or higher. Patch by Jacob Appelbaum
  28638. and Steven Murdoch. Bugfix on 0.0.2pre14. Fixes bug 848.
  28639. - Do not use or believe expired v3 authority certificates. Patch
  28640. from Karsten. Bugfix in 0.2.0.x. Fixes bug 851.
  28641. o Minor features:
  28642. - Now NodeFamily and MyFamily config options allow spaces in
  28643. identity fingerprints, so it's easier to paste them in.
  28644. Suggested by Lucky Green.
  28645. - Implement the 0x20 hack to better resist DNS poisoning: set the
  28646. case on outgoing DNS requests randomly, and reject responses that do
  28647. not match the case correctly. This logic can be disabled with the
  28648. ServerDNSRandomizeCase setting, if you are using one of the 0.3%
  28649. of servers that do not reliably preserve case in replies. See
  28650. "Increased DNS Forgery Resistance through 0x20-Bit Encoding"
  28651. for more info.
  28652. - Preserve case in replies to DNSPort requests in order to support
  28653. the 0x20 hack for resisting DNS poisoning attacks.
  28654. o Hidden service performance improvements:
  28655. - When the client launches an introduction circuit, retry with a
  28656. new circuit after 30 seconds rather than 60 seconds.
  28657. - Launch a second client-side introduction circuit in parallel
  28658. after a delay of 15 seconds (based on work by Christian Wilms).
  28659. - Hidden services start out building five intro circuits rather
  28660. than three, and when the first three finish they publish a service
  28661. descriptor using those. Now we publish our service descriptor much
  28662. faster after restart.
  28663. o Minor bugfixes:
  28664. - Minor fix in the warning messages when you're having problems
  28665. bootstrapping; also, be more forgiving of bootstrap problems when
  28666. we're still making incremental progress on a given bootstrap phase.
  28667. - When we're choosing an exit node for a circuit, and we have
  28668. no pending streams, choose a good general exit rather than one that
  28669. supports "all the pending streams". Bugfix on 0.1.1.x. Fix by rovv.
  28670. - Send a valid END cell back when a client tries to connect to a
  28671. nonexistent hidden service port. Bugfix on 0.1.2.15. Fixes bug
  28672. 840. Patch from rovv.
  28673. - If a broken client asks a non-exit router to connect somewhere,
  28674. do not even do the DNS lookup before rejecting the connection.
  28675. Fixes another case of bug 619. Patch from rovv.
  28676. - Fix another case of assuming, when a specific exit is requested,
  28677. that we know more than the user about what hosts it allows.
  28678. Fixes another case of bug 752. Patch from rovv.
  28679. - Check which hops rendezvous stream cells are associated with to
  28680. prevent possible guess-the-streamid injection attacks from
  28681. intermediate hops. Fixes another case of bug 446. Based on patch
  28682. from rovv.
  28683. - Avoid using a negative right-shift when comparing 32-bit
  28684. addresses. Possible fix for bug 845 and bug 811.
  28685. - Make the assert_circuit_ok() function work correctly on circuits that
  28686. have already been marked for close.
  28687. - Fix read-off-the-end-of-string error in unit tests when decoding
  28688. introduction points.
  28689. - Fix uninitialized size field for memory area allocation: may improve
  28690. memory performance during directory parsing.
  28691. - Treat duplicate certificate fetches as failures, so that we do
  28692. not try to re-fetch an expired certificate over and over and over.
  28693. - Do not say we're fetching a certificate when we'll in fact skip it
  28694. because of a pending download.
  28695. Changes in version 0.2.1.6-alpha - 2008-09-30
  28696. Tor 0.2.1.6-alpha further improves performance and robustness of
  28697. hidden services, starts work on supporting per-country relay selection,
  28698. and fixes a variety of smaller issues.
  28699. o Major features:
  28700. - Implement proposal 121: make it possible to build hidden services
  28701. that only certain clients are allowed to connect to. This is
  28702. enforced at several points, so that unauthorized clients are unable
  28703. to send INTRODUCE cells to the service, or even (depending on the
  28704. type of authentication) to learn introduction points. This feature
  28705. raises the bar for certain kinds of active attacks against hidden
  28706. services. Code by Karsten Loesing.
  28707. - Relays now store and serve v2 hidden service descriptors by default,
  28708. i.e., the new default value for HidServDirectoryV2 is 1. This is
  28709. the last step in proposal 114, which aims to make hidden service
  28710. lookups more reliable.
  28711. - Start work to allow node restrictions to include country codes. The
  28712. syntax to exclude nodes in a country with country code XX is
  28713. "ExcludeNodes {XX}". Patch from Robert Hogan. It still needs some
  28714. refinement to decide what config options should take priority if
  28715. you ask to both use a particular node and exclude it.
  28716. - Allow ExitNodes list to include IP ranges and country codes, just
  28717. like the Exclude*Nodes lists. Patch from Robert Hogan.
  28718. o Major bugfixes:
  28719. - Fix a bug when parsing ports in tor_addr_port_parse() that caused
  28720. Tor to fail to start if you had it configured to use a bridge
  28721. relay. Fixes bug 809. Bugfix on 0.2.1.5-alpha.
  28722. - When extending a circuit to a hidden service directory to upload a
  28723. rendezvous descriptor using a BEGIN_DIR cell, almost 1/6 of all
  28724. requests failed, because the router descriptor had not been
  28725. downloaded yet. In these cases, we now wait until the router
  28726. descriptor is downloaded, and then retry. Likewise, clients
  28727. now skip over a hidden service directory if they don't yet have
  28728. its router descriptor, rather than futilely requesting it and
  28729. putting mysterious complaints in the logs. Fixes bug 767. Bugfix
  28730. on 0.2.0.10-alpha.
  28731. - When fetching v0 and v2 rendezvous service descriptors in parallel,
  28732. we were failing the whole hidden service request when the v0
  28733. descriptor fetch fails, even if the v2 fetch is still pending and
  28734. might succeed. Similarly, if the last v2 fetch fails, we were
  28735. failing the whole hidden service request even if a v0 fetch is
  28736. still pending. Fixes bug 814. Bugfix on 0.2.0.10-alpha.
  28737. - DNS replies need to have names matching their requests, but
  28738. these names should be in the questions section, not necessarily
  28739. in the answers section. Fixes bug 823. Bugfix on 0.2.1.5-alpha.
  28740. o Minor features:
  28741. - Update to the "September 1 2008" ip-to-country file.
  28742. - Allow ports 465 and 587 in the default exit policy again. We had
  28743. rejected them in 0.1.0.15, because back in 2005 they were commonly
  28744. misconfigured and ended up as spam targets. We hear they are better
  28745. locked down these days.
  28746. - Use a lockfile to make sure that two Tor processes are not
  28747. simultaneously running with the same datadir.
  28748. - Serve the latest v3 networkstatus consensus via the control
  28749. port. Use "getinfo dir/status-vote/current/consensus" to fetch it.
  28750. - Better logging about stability/reliability calculations on directory
  28751. servers.
  28752. - Drop the requirement to have an open dir port for storing and
  28753. serving v2 hidden service descriptors.
  28754. - Directory authorities now serve a /tor/dbg-stability.txt URL to
  28755. help debug WFU and MTBF calculations.
  28756. - Implement most of Proposal 152: allow specialized servers to permit
  28757. single-hop circuits, and clients to use those servers to build
  28758. single-hop circuits when using a specialized controller. Patch
  28759. from Josh Albrecht. Resolves feature request 768.
  28760. - Add a -p option to tor-resolve for specifying the SOCKS port: some
  28761. people find host:port too confusing.
  28762. - Make TrackHostExit mappings expire a while after their last use, not
  28763. after their creation. Patch from Robert Hogan.
  28764. - Provide circuit purposes along with circuit events to the controller.
  28765. o Minor bugfixes:
  28766. - Fix compile on OpenBSD 4.4-current. Bugfix on 0.2.1.5-alpha.
  28767. Reported by Tas.
  28768. - Fixed some memory leaks -- some quite frequent, some almost
  28769. impossible to trigger -- based on results from Coverity.
  28770. - When testing for libevent functions, set the LDFLAGS variable
  28771. correctly. Found by Riastradh.
  28772. - Fix an assertion bug in parsing policy-related options; possible fix
  28773. for bug 811.
  28774. - Catch and report a few more bootstrapping failure cases when Tor
  28775. fails to establish a TCP connection. Cleanup on 0.2.1.x.
  28776. - Avoid a bug where the FastFirstHopPK 0 option would keep Tor from
  28777. bootstrapping with tunneled directory connections. Bugfix on
  28778. 0.1.2.5-alpha. Fixes bug 797. Found by Erwin Lam.
  28779. - When asked to connect to A.B.exit:80, if we don't know the IP for A
  28780. and we know that server B rejects most-but-not all connections to
  28781. port 80, we would previously reject the connection. Now, we assume
  28782. the user knows what they were asking for. Fixes bug 752. Bugfix
  28783. on 0.0.9rc5. Diagnosed by BarkerJr.
  28784. - If we are not using BEGIN_DIR cells, don't attempt to contact hidden
  28785. service directories if they have no advertised dir port. Bugfix
  28786. on 0.2.0.10-alpha.
  28787. - If we overrun our per-second write limits a little, count this as
  28788. having used up our write allocation for the second, and choke
  28789. outgoing directory writes. Previously, we had only counted this when
  28790. we had met our limits precisely. Fixes bug 824. Patch by rovv.
  28791. Bugfix on 0.2.0.x (??).
  28792. - Avoid a "0 divided by 0" calculation when calculating router uptime
  28793. at directory authorities. Bugfix on 0.2.0.8-alpha.
  28794. - Make DNS resolved controller events into "CLOSED", not
  28795. "FAILED". Bugfix on 0.1.2.5-alpha. Fix by Robert Hogan. Resolves
  28796. bug 807.
  28797. - Fix a bug where an unreachable relay would establish enough
  28798. reachability testing circuits to do a bandwidth test -- if
  28799. we already have a connection to the middle hop of the testing
  28800. circuit, then it could establish the last hop by using the existing
  28801. connection. Bugfix on 0.1.2.2-alpha, exposed when we made testing
  28802. circuits no longer use entry guards in 0.2.1.3-alpha.
  28803. - If we have correct permissions on $datadir, we complain to stdout
  28804. and fail to start. But dangerous permissions on
  28805. $datadir/cached-status/ would cause us to open a log and complain
  28806. there. Now complain to stdout and fail to start in both cases. Fixes
  28807. bug 820, reported by seeess.
  28808. - Remove the old v2 directory authority 'lefkada' from the default
  28809. list. It has been gone for many months.
  28810. o Code simplifications and refactoring:
  28811. - Revise the connection_new functions so that a more typesafe variant
  28812. exists. This will work better with Coverity, and let us find any
  28813. actual mistakes we're making here.
  28814. - Refactor unit testing logic so that dmalloc can be used sensibly
  28815. with unit tests to check for memory leaks.
  28816. - Move all hidden-service related fields from connection and circuit
  28817. structure to substructures: this way they won't eat so much memory.
  28818. Changes in version 0.2.0.31 - 2008-09-03
  28819. Tor 0.2.0.31 addresses two potential anonymity issues, starts to fix
  28820. a big bug we're seeing where in rare cases traffic from one Tor stream
  28821. gets mixed into another stream, and fixes a variety of smaller issues.
  28822. o Major bugfixes:
  28823. - Make sure that two circuits can never exist on the same connection
  28824. with the same circuit ID, even if one is marked for close. This
  28825. is conceivably a bugfix for bug 779. Bugfix on 0.1.0.4-rc.
  28826. - Relays now reject risky extend cells: if the extend cell includes
  28827. a digest of all zeroes, or asks to extend back to the relay that
  28828. sent the extend cell, tear down the circuit. Ideas suggested
  28829. by rovv.
  28830. - If not enough of our entry guards are available so we add a new
  28831. one, we might use the new one even if it overlapped with the
  28832. current circuit's exit relay (or its family). Anonymity bugfix
  28833. pointed out by rovv.
  28834. o Minor bugfixes:
  28835. - Recover 3-7 bytes that were wasted per memory chunk. Fixes bug
  28836. 794; bug spotted by rovv. Bugfix on 0.2.0.1-alpha.
  28837. - Correctly detect the presence of the linux/netfilter_ipv4.h header
  28838. when building against recent kernels. Bugfix on 0.1.2.1-alpha.
  28839. - Pick size of default geoip filename string correctly on windows.
  28840. Fixes bug 806. Bugfix on 0.2.0.30.
  28841. - Make the autoconf script accept the obsolete --with-ssl-dir
  28842. option as an alias for the actually-working --with-openssl-dir
  28843. option. Fix the help documentation to recommend --with-openssl-dir.
  28844. Based on a patch by "Dave". Bugfix on 0.2.0.1-alpha.
  28845. - When using the TransPort option on OpenBSD, and using the User
  28846. option to change UID and drop privileges, make sure to open
  28847. /dev/pf before dropping privileges. Fixes bug 782. Patch from
  28848. Christopher Davis. Bugfix on 0.1.2.1-alpha.
  28849. - Try to attach connections immediately upon receiving a RENDEZVOUS2
  28850. or RENDEZVOUS_ESTABLISHED cell. This can save a second or two
  28851. on the client side when connecting to a hidden service. Bugfix
  28852. on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743.
  28853. - When closing an application-side connection because its circuit is
  28854. getting torn down, generate the stream event correctly. Bugfix on
  28855. 0.1.2.x. Anonymous patch.
  28856. Changes in version 0.2.1.5-alpha - 2008-08-31
  28857. Tor 0.2.1.5-alpha moves us closer to handling IPv6 destinations, puts
  28858. in a lot of the infrastructure for adding authorization to hidden
  28859. services, lays the groundwork for having clients read their load
  28860. balancing information out of the networkstatus consensus rather than
  28861. the individual router descriptors, addresses two potential anonymity
  28862. issues, and fixes a variety of smaller issues.
  28863. o Major features:
  28864. - Convert many internal address representations to optionally hold
  28865. IPv6 addresses.
  28866. - Generate and accept IPv6 addresses in many protocol elements.
  28867. - Make resolver code handle nameservers located at ipv6 addresses.
  28868. - Begin implementation of proposal 121 ("Client authorization for
  28869. hidden services"): configure hidden services with client
  28870. authorization, publish descriptors for them, and configure
  28871. authorization data for hidden services at clients. The next
  28872. step is to actually access hidden services that perform client
  28873. authorization.
  28874. - More progress toward proposal 141: Network status consensus
  28875. documents and votes now contain bandwidth information for each
  28876. router and a summary of that router's exit policy. Eventually this
  28877. will be used by clients so that they do not have to download every
  28878. known descriptor before building circuits.
  28879. o Major bugfixes (on 0.2.0.x and before):
  28880. - When sending CREATED cells back for a given circuit, use a 64-bit
  28881. connection ID to find the right connection, rather than an addr:port
  28882. combination. Now that we can have multiple OR connections between
  28883. the same ORs, it is no longer possible to use addr:port to uniquely
  28884. identify a connection.
  28885. - Relays now reject risky extend cells: if the extend cell includes
  28886. a digest of all zeroes, or asks to extend back to the relay that
  28887. sent the extend cell, tear down the circuit. Ideas suggested
  28888. by rovv.
  28889. - If not enough of our entry guards are available so we add a new
  28890. one, we might use the new one even if it overlapped with the
  28891. current circuit's exit relay (or its family). Anonymity bugfix
  28892. pointed out by rovv.
  28893. o Minor bugfixes:
  28894. - Recover 3-7 bytes that were wasted per memory chunk. Fixes bug
  28895. 794; bug spotted by rovv. Bugfix on 0.2.0.1-alpha.
  28896. - When using the TransPort option on OpenBSD, and using the User
  28897. option to change UID and drop privileges, make sure to open /dev/pf
  28898. before dropping privileges. Fixes bug 782. Patch from Christopher
  28899. Davis. Bugfix on 0.1.2.1-alpha.
  28900. - Correctly detect the presence of the linux/netfilter_ipv4.h header
  28901. when building against recent kernels. Bugfix on 0.1.2.1-alpha.
  28902. - Add a missing safe_str() call for a debug log message.
  28903. - Use 64 bits instead of 32 bits for connection identifiers used with
  28904. the controller protocol, to greatly reduce risk of identifier reuse.
  28905. - Make the autoconf script accept the obsolete --with-ssl-dir
  28906. option as an alias for the actually-working --with-openssl-dir
  28907. option. Fix the help documentation to recommend --with-openssl-dir.
  28908. Based on a patch by "Dave". Bugfix on 0.2.0.1-alpha.
  28909. o Minor features:
  28910. - Rate-limit too-many-sockets messages: when they happen, they happen
  28911. a lot. Resolves bug 748.
  28912. - Resist DNS poisoning a little better by making sure that names in
  28913. answer sections match.
  28914. - Print the SOCKS5 error message string as well as the error code
  28915. when a tor-resolve request fails. Patch from Jacob.
  28916. Changes in version 0.2.1.4-alpha - 2008-08-04
  28917. Tor 0.2.1.4-alpha fixes a pair of crash bugs in 0.2.1.3-alpha.
  28918. o Major bugfixes:
  28919. - The address part of exit policies was not correctly written
  28920. to router descriptors. This generated router descriptors that failed
  28921. their self-checks. Noticed by phobos, fixed by Karsten. Bugfix
  28922. on 0.2.1.3-alpha.
  28923. - Tor triggered a false assert when extending a circuit to a relay
  28924. but we already have a connection open to that relay. Noticed by
  28925. phobos, fixed by Karsten. Bugfix on 0.2.1.3-alpha.
  28926. o Minor bugfixes:
  28927. - Fix a hidden service logging bug: in some edge cases, the router
  28928. descriptor of a previously picked introduction point becomes
  28929. obsolete and we need to give up on it rather than continually
  28930. complaining that it has become obsolete. Observed by xiando. Bugfix
  28931. on 0.2.1.3-alpha.
  28932. o Removed features:
  28933. - Take out the TestVia config option, since it was a workaround for
  28934. a bug that was fixed in Tor 0.1.1.21.
  28935. Changes in version 0.2.1.3-alpha - 2008-08-03
  28936. Tor 0.2.1.3-alpha implements most of the pieces to prevent
  28937. infinite-length circuit attacks (see proposal 110); fixes a bug that
  28938. might cause exit relays to corrupt streams they send back; allows
  28939. address patterns (e.g. 255.128.0.0/16) to appear in ExcludeNodes and
  28940. ExcludeExitNodes config options; and fixes a big pile of bugs.
  28941. o Bootstrapping bugfixes (on 0.2.1.x-alpha):
  28942. - Send a bootstrap problem "warn" event on the first problem if the
  28943. reason is NO_ROUTE (that is, our network is down).
  28944. o Major features:
  28945. - Implement most of proposal 110: The first K cells to be sent
  28946. along a circuit are marked as special "early" cells; only K "early"
  28947. cells will be allowed. Once this code is universal, we can block
  28948. certain kinds of DOS attack by requiring that EXTEND commands must
  28949. be sent using an "early" cell.
  28950. o Major bugfixes:
  28951. - Try to attach connections immediately upon receiving a RENDEZVOUS2
  28952. or RENDEZVOUS_ESTABLISHED cell. This can save a second or two
  28953. on the client side when connecting to a hidden service. Bugfix
  28954. on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743.
  28955. - Ensure that two circuits can never exist on the same connection
  28956. with the same circuit ID, even if one is marked for close. This
  28957. is conceivably a bugfix for bug 779; fixes a bug on 0.1.0.4-rc.
  28958. o Minor features:
  28959. - When relays do their initial bandwidth measurement, don't limit
  28960. to just our entry guards for the test circuits. Otherwise we tend
  28961. to have multiple test circuits going through a single entry guard,
  28962. which makes our bandwidth test less accurate. Fixes part of bug 654;
  28963. patch contributed by Josh Albrecht.
  28964. - Add an ExcludeExitNodes option so users can list a set of nodes
  28965. that should be be excluded from the exit node position, but
  28966. allowed elsewhere. Implements proposal 151.
  28967. - Allow address patterns (e.g., 255.128.0.0/16) to appear in
  28968. ExcludeNodes and ExcludeExitNodes lists.
  28969. - Change the implementation of ExcludeNodes and ExcludeExitNodes to
  28970. be more efficient. Formerly it was quadratic in the number of
  28971. servers; now it should be linear. Fixes bug 509.
  28972. - Save 16-22 bytes per open circuit by moving the n_addr, n_port,
  28973. and n_conn_id_digest fields into a separate structure that's
  28974. only needed when the circuit has not yet attached to an n_conn.
  28975. o Minor bugfixes:
  28976. - Change the contrib/tor.logrotate script so it makes the new
  28977. logs as "_tor:_tor" rather than the default, which is generally
  28978. "root:wheel". Fixes bug 676, reported by Serge Koksharov.
  28979. - Stop using __attribute__((nonnull)) with GCC: it can give us useful
  28980. warnings (occasionally), but it can also cause the compiler to
  28981. eliminate error-checking code. Suggested by Peter Gutmann.
  28982. - When a hidden service is giving up on an introduction point candidate
  28983. that was not included in the last published rendezvous descriptor,
  28984. don't reschedule publication of the next descriptor. Fixes bug 763.
  28985. Bugfix on 0.0.9.3.
  28986. - Mark RendNodes, RendExcludeNodes, HiddenServiceNodes, and
  28987. HiddenServiceExcludeNodes as obsolete: they never worked properly,
  28988. and nobody claims to be using them. Fixes bug 754. Bugfix on
  28989. 0.1.0.1-rc. Patch from Christian Wilms.
  28990. - Fix a small alignment and memory-wasting bug on buffer chunks.
  28991. Spotted by rovv.
  28992. o Minor bugfixes (controller):
  28993. - When closing an application-side connection because its circuit
  28994. is getting torn down, generate the stream event correctly.
  28995. Bugfix on 0.1.2.x. Anonymous patch.
  28996. o Removed features:
  28997. - Remove all backward-compatibility code to support relays running
  28998. versions of Tor so old that they no longer work at all on the
  28999. Tor network.
  29000. Changes in version 0.2.0.30 - 2008-07-15
  29001. o Minor bugfixes:
  29002. - Stop using __attribute__((nonnull)) with GCC: it can give us useful
  29003. warnings (occasionally), but it can also cause the compiler to
  29004. eliminate error-checking code. Suggested by Peter Gutmann.
  29005. Changes in version 0.2.0.29-rc - 2008-07-08
  29006. Tor 0.2.0.29-rc fixes two big bugs with using bridges, fixes more
  29007. hidden-service performance bugs, and fixes a bunch of smaller bugs.
  29008. o Major bugfixes:
  29009. - If you have more than one bridge but don't know their keys,
  29010. you would only launch a request for the descriptor of the first one
  29011. on your list. (Tor considered launching requests for the others, but
  29012. found that it already had a connection on the way for $0000...0000
  29013. so it didn't open another.) Bugfix on 0.2.0.x.
  29014. - If you have more than one bridge but don't know their keys, and the
  29015. connection to one of the bridges failed, you would cancel all
  29016. pending bridge connections. (After all, they all have the same
  29017. digest.) Bugfix on 0.2.0.x.
  29018. - When a hidden service was trying to establish an introduction point,
  29019. and Tor had built circuits preemptively for such purposes, we
  29020. were ignoring all the preemptive circuits and launching a new one
  29021. instead. Bugfix on 0.2.0.14-alpha.
  29022. - When a hidden service was trying to establish an introduction point,
  29023. and Tor *did* manage to reuse one of the preemptively built
  29024. circuits, it didn't correctly remember which one it used,
  29025. so it asked for another one soon after, until there were no
  29026. more preemptive circuits, at which point it launched one from
  29027. scratch. Bugfix on 0.0.9.x.
  29028. - Make directory servers include the X-Your-Address-Is: http header in
  29029. their responses even for begin_dir conns. Now clients who only
  29030. ever use begin_dir connections still have a way to learn their IP
  29031. address. Fixes bug 737; bugfix on 0.2.0.22-rc. Reported by goldy.
  29032. o Minor bugfixes:
  29033. - Fix a macro/CPP interaction that was confusing some compilers:
  29034. some GCCs don't like #if/#endif pairs inside macro arguments.
  29035. Fixes bug 707.
  29036. - Fix macro collision between OpenSSL 0.9.8h and Windows headers.
  29037. Fixes bug 704; fix from Steven Murdoch.
  29038. - When opening /dev/null in finish_daemonize(), do not pass the
  29039. O_CREAT flag. Fortify was complaining, and correctly so. Fixes
  29040. bug 742; fix from Michael Scherer. Bugfix on 0.0.2pre19.
  29041. - Correctly detect transparent proxy support on Linux hosts that
  29042. require in.h to be included before netfilter_ipv4.h. Patch
  29043. from coderman.
  29044. - Disallow session resumption attempts during the renegotiation
  29045. stage of the v2 handshake protocol. Clients should never be trying
  29046. session resumption at this point, but apparently some did, in
  29047. ways that caused the handshake to fail. Bugfix on 0.2.0.20-rc. Bug
  29048. found by Geoff Goodell.
  29049. Changes in version 0.2.1.2-alpha - 2008-06-20
  29050. Tor 0.2.1.2-alpha includes a new "TestingTorNetwork" config option to
  29051. make it easier to set up your own private Tor network; fixes several
  29052. big bugs with using more than one bridge relay; fixes a big bug with
  29053. offering hidden services quickly after Tor starts; and uses a better
  29054. API for reporting potential bootstrapping problems to the controller.
  29055. o Major features:
  29056. - New TestingTorNetwork config option to allow adjustment of
  29057. previously constant values that, while reasonable, could slow
  29058. bootstrapping. Implements proposal 135. Patch from Karsten.
  29059. o Major bugfixes:
  29060. - If you have more than one bridge but don't know their digests,
  29061. you would only learn a request for the descriptor of the first one
  29062. on your list. (Tor considered launching requests for the others, but
  29063. found that it already had a connection on the way for $0000...0000
  29064. so it didn't open another.) Bugfix on 0.2.0.x.
  29065. - If you have more than one bridge but don't know their digests,
  29066. and the connection to one of the bridges failed, you would cancel
  29067. all pending bridge connections. (After all, they all have the
  29068. same digest.) Bugfix on 0.2.0.x.
  29069. - When establishing a hidden service, introduction points that
  29070. originate from cannibalized circuits are completely ignored and not
  29071. included in rendezvous service descriptors. This might be another
  29072. reason for delay in making a hidden service available. Bugfix
  29073. from long ago (0.0.9.x?)
  29074. o Minor features:
  29075. - Allow OpenSSL to use dynamic locks if it wants.
  29076. - When building a consensus, do not include routers that are down.
  29077. This will cut down 30% to 40% on consensus size. Implements
  29078. proposal 138.
  29079. - In directory authorities' approved-routers files, allow
  29080. fingerprints with or without space.
  29081. - Add a "GETINFO /status/bootstrap-phase" controller option, so the
  29082. controller can query our current bootstrap state in case it attaches
  29083. partway through and wants to catch up.
  29084. - Send an initial "Starting" bootstrap status event, so we have a
  29085. state to start out in.
  29086. o Minor bugfixes:
  29087. - Asking for a conditional consensus at .../consensus/<fingerprints>
  29088. would crash a dirserver if it did not already have a
  29089. consensus. Bugfix on 0.2.1.1-alpha.
  29090. - Clean up some macro/CPP interactions: some GCC versions don't like
  29091. #if/#endif pairs inside macro arguments. Fixes bug 707. Bugfix on
  29092. 0.2.0.x.
  29093. o Bootstrapping bugfixes (on 0.2.1.1-alpha):
  29094. - Directory authorities shouldn't complain about bootstrapping
  29095. problems just because they do a lot of reachability testing and
  29096. some of the connection attempts fail.
  29097. - Start sending "count" and "recommendation" key/value pairs in
  29098. bootstrap problem status events, so the controller can hear about
  29099. problems even before Tor decides they're worth reporting for sure.
  29100. - If you're using bridges, generate "bootstrap problem" warnings
  29101. as soon as you run out of working bridges, rather than waiting
  29102. for ten failures -- which will never happen if you have less than
  29103. ten bridges.
  29104. - If we close our OR connection because there's been a circuit
  29105. pending on it for too long, we were telling our bootstrap status
  29106. events "REASON=NONE". Now tell them "REASON=TIMEOUT".
  29107. Changes in version 0.2.1.1-alpha - 2008-06-13
  29108. Tor 0.2.1.1-alpha fixes a lot of memory fragmentation problems that
  29109. were making the Tor process bloat especially on Linux; makes our TLS
  29110. handshake blend in better; sends "bootstrap phase" status events to
  29111. the controller, so it can keep the user informed of progress (and
  29112. problems) fetching directory information and establishing circuits;
  29113. and adds a variety of smaller features.
  29114. o Major features:
  29115. - More work on making our TLS handshake blend in: modify the list
  29116. of ciphers advertised by OpenSSL in client mode to even more
  29117. closely resemble a common web browser. We cheat a little so that
  29118. we can advertise ciphers that the locally installed OpenSSL doesn't
  29119. know about.
  29120. - Start sending "bootstrap phase" status events to the controller,
  29121. so it can keep the user informed of progress fetching directory
  29122. information and establishing circuits. Also inform the controller
  29123. if we think we're stuck at a particular bootstrap phase. Implements
  29124. proposal 137.
  29125. - Resume using OpenSSL's RAND_poll() for better (and more portable)
  29126. cross-platform entropy collection again. We used to use it, then
  29127. stopped using it because of a bug that could crash systems that
  29128. called RAND_poll when they had a lot of fds open. It looks like the
  29129. bug got fixed in late 2006. Our new behavior is to call RAND_poll()
  29130. at startup, and to call RAND_poll() when we reseed later only if
  29131. we have a non-buggy OpenSSL version.
  29132. o Major bugfixes:
  29133. - When we choose to abandon a new entry guard because we think our
  29134. older ones might be better, close any circuits pending on that
  29135. new entry guard connection. This fix should make us recover much
  29136. faster when our network is down and then comes back. Bugfix on
  29137. 0.1.2.8-beta; found by lodger.
  29138. o Memory fixes and improvements:
  29139. - Add a malloc_good_size implementation to OpenBSD_malloc_linux.c,
  29140. to avoid unused RAM in buffer chunks and memory pools.
  29141. - Speed up parsing and cut down on memory fragmentation by using
  29142. stack-style allocations for parsing directory objects. Previously,
  29143. this accounted for over 40% of allocations from within Tor's code
  29144. on a typical directory cache.
  29145. - Use a Bloom filter rather than a digest-based set to track which
  29146. descriptors we need to keep around when we're cleaning out old
  29147. router descriptors. This speeds up the computation significantly,
  29148. and may reduce fragmentation.
  29149. - Reduce the default smartlist size from 32 to 16; it turns out that
  29150. most smartlists hold around 8-12 elements tops.
  29151. - Make dumpstats() log the fullness and size of openssl-internal
  29152. buffers.
  29153. - If the user has applied the experimental SSL_MODE_RELEASE_BUFFERS
  29154. patch to their OpenSSL, turn it on to save memory on servers. This
  29155. patch will (with any luck) get included in a mainline distribution
  29156. before too long.
  29157. - Never use OpenSSL compression: it wastes RAM and CPU trying to
  29158. compress cells, which are basically all encrypted, compressed,
  29159. or both.
  29160. o Minor bugfixes:
  29161. - Stop reloading the router list from disk for no reason when we
  29162. run out of reachable directory mirrors. Once upon a time reloading
  29163. it would set the 'is_running' flag back to 1 for them. It hasn't
  29164. done that for a long time.
  29165. - In very rare situations new hidden service descriptors were
  29166. published earlier than 30 seconds after the last change to the
  29167. service. (We currently think that a hidden service descriptor
  29168. that's been stable for 30 seconds is worth publishing.)
  29169. o Minor features:
  29170. - Allow separate log levels to be configured for different logging
  29171. domains. For example, this allows one to log all notices, warnings,
  29172. or errors, plus all memory management messages of level debug or
  29173. higher, with: Log [MM] debug-err [*] notice-err file /var/log/tor.
  29174. - Add a couple of extra warnings to --enable-gcc-warnings for GCC 4.3,
  29175. and stop using a warning that had become unfixably verbose under
  29176. GCC 4.3.
  29177. - New --hush command-line option similar to --quiet. While --quiet
  29178. disables all logging to the console on startup, --hush limits the
  29179. output to messages of warning and error severity.
  29180. - Servers support a new URL scheme for consensus downloads that
  29181. allows the client to specify which authorities are trusted.
  29182. The server then only sends the consensus if the client will trust
  29183. it. Otherwise a 404 error is sent back. Clients use this
  29184. new scheme when the server supports it (meaning it's running
  29185. 0.2.1.1-alpha or later). Implements proposal 134.
  29186. - New configure/torrc options (--enable-geoip-stats,
  29187. DirRecordUsageByCountry) to record how many IPs we've served
  29188. directory info to in each country code, how many status documents
  29189. total we've sent to each country code, and what share of the total
  29190. directory requests we should expect to see.
  29191. - Use the TLS1 hostname extension to more closely resemble browser
  29192. behavior.
  29193. - Lots of new unit tests.
  29194. - Add a macro to implement the common pattern of iterating through
  29195. two parallel lists in lockstep.
  29196. Changes in version 0.2.0.28-rc - 2008-06-13
  29197. Tor 0.2.0.28-rc fixes an anonymity-related bug, fixes a hidden-service
  29198. performance bug, and fixes a bunch of smaller bugs.
  29199. o Anonymity fixes:
  29200. - Fix a bug where, when we were choosing the 'end stream reason' to
  29201. put in our relay end cell that we send to the exit relay, Tor
  29202. clients on Windows were sometimes sending the wrong 'reason'. The
  29203. anonymity problem is that exit relays may be able to guess whether
  29204. the client is running Windows, thus helping partition the anonymity
  29205. set. Down the road we should stop sending reasons to exit relays,
  29206. or otherwise prevent future versions of this bug.
  29207. o Major bugfixes:
  29208. - While setting up a hidden service, some valid introduction circuits
  29209. were overlooked and abandoned. This might be the reason for
  29210. the long delay in making a hidden service available. Bugfix on
  29211. 0.2.0.14-alpha.
  29212. o Minor features:
  29213. - Update to the "June 9 2008" ip-to-country file.
  29214. - Run 'make test' as part of 'make dist', so we stop releasing so
  29215. many development snapshots that fail their unit tests.
  29216. o Minor bugfixes:
  29217. - When we're checking if we have enough dir info for each relay
  29218. to begin establishing circuits, make sure that we actually have
  29219. the descriptor listed in the consensus, not just any descriptor.
  29220. Bugfix on 0.1.2.x.
  29221. - Bridge relays no longer print "xx=0" in their extrainfo document
  29222. for every single country code in the geoip db. Bugfix on
  29223. 0.2.0.27-rc.
  29224. - Only warn when we fail to load the geoip file if we were planning to
  29225. include geoip stats in our extrainfo document. Bugfix on 0.2.0.27-rc.
  29226. - If we change our MaxAdvertisedBandwidth and then reload torrc,
  29227. Tor won't realize it should publish a new relay descriptor. Fixes
  29228. bug 688, reported by mfr. Bugfix on 0.1.2.x.
  29229. - When we haven't had any application requests lately, don't bother
  29230. logging that we have expired a bunch of descriptors. Bugfix
  29231. on 0.1.2.x.
  29232. - Make relay cells written on a connection count as non-padding when
  29233. tracking how long a connection has been in use. Bugfix on
  29234. 0.2.0.1-alpha. Spotted by lodger.
  29235. - Fix unit tests in 0.2.0.27-rc.
  29236. - Fix compile on Windows.
  29237. Changes in version 0.2.0.27-rc - 2008-06-03
  29238. Tor 0.2.0.27-rc adds a few features we left out of the earlier
  29239. release candidates. In particular, we now include an IP-to-country
  29240. GeoIP database, so controllers can easily look up what country a
  29241. given relay is in, and so bridge relays can give us some sanitized
  29242. summaries about which countries are making use of bridges. (See proposal
  29243. 126-geoip-fetching.txt for details.)
  29244. o Major features:
  29245. - Include an IP-to-country GeoIP file in the tarball, so bridge
  29246. relays can report sanitized summaries of the usage they're seeing.
  29247. o Minor features:
  29248. - Add a "PURPOSE=" argument to "STREAM NEW" events, as suggested by
  29249. Robert Hogan. Fixes the first part of bug 681.
  29250. - Make bridge authorities never serve extrainfo docs.
  29251. - Add support to detect Libevent versions in the 1.4.x series
  29252. on mingw.
  29253. - Fix build on gcc 4.3 with --enable-gcc-warnings set.
  29254. - Include a new contrib/tor-exit-notice.html file that exit relay
  29255. operators can put on their website to help reduce abuse queries.
  29256. o Minor bugfixes:
  29257. - When tunneling an encrypted directory connection, and its first
  29258. circuit fails, do not leave it unattached and ask the controller
  29259. to deal. Fixes the second part of bug 681.
  29260. - Make bridge authorities correctly expire old extrainfo documents
  29261. from time to time.
  29262. Changes in version 0.2.0.26-rc - 2008-05-13
  29263. Tor 0.2.0.26-rc fixes a major security vulnerability caused by a bug
  29264. in Debian's OpenSSL packages. All users running any 0.2.0.x version
  29265. should upgrade, whether they're running Debian or not.
  29266. o Major security fixes:
  29267. - Use new V3 directory authority keys on the tor26, gabelmoo, and
  29268. moria1 V3 directory authorities. The old keys were generated with
  29269. a vulnerable version of Debian's OpenSSL package, and must be
  29270. considered compromised. Other authorities' keys were not generated
  29271. with an affected version of OpenSSL.
  29272. o Major bugfixes:
  29273. - List authority signatures as "unrecognized" based on DirServer
  29274. lines, not on cert cache. Bugfix on 0.2.0.x.
  29275. o Minor features:
  29276. - Add a new V3AuthUseLegacyKey option to make it easier for
  29277. authorities to change their identity keys if they have to.
  29278. Changes in version 0.2.0.25-rc - 2008-04-23
  29279. Tor 0.2.0.25-rc makes Tor work again on OS X and certain BSDs.
  29280. o Major bugfixes:
  29281. - Remember to initialize threading before initializing logging.
  29282. Otherwise, many BSD-family implementations will crash hard on
  29283. startup. Fixes bug 671. Bugfix on 0.2.0.24-rc.
  29284. o Minor bugfixes:
  29285. - Authorities correctly free policies on bad servers on
  29286. exit. Fixes bug 672. Bugfix on 0.2.0.x.
  29287. Changes in version 0.2.0.24-rc - 2008-04-22
  29288. Tor 0.2.0.24-rc adds dizum (run by Alex de Joode) as the new sixth
  29289. v3 directory authority, makes relays with dynamic IP addresses and no
  29290. DirPort notice more quickly when their IP address changes, fixes a few
  29291. rare crashes and memory leaks, and fixes a few other miscellaneous bugs.
  29292. o New directory authorities:
  29293. - Take lefkada out of the list of v3 directory authorities, since
  29294. it has been down for months.
  29295. - Set up dizum (run by Alex de Joode) as the new sixth v3 directory
  29296. authority.
  29297. o Major bugfixes:
  29298. - Detect address changes more quickly on non-directory mirror
  29299. relays. Bugfix on 0.2.0.18-alpha; fixes bug 652.
  29300. o Minor features (security):
  29301. - Reject requests for reverse-dns lookup of names that are in
  29302. a private address space. Patch from lodger.
  29303. - Non-exit relays no longer allow DNS requests. Fixes bug 619. Patch
  29304. from lodger.
  29305. o Minor bugfixes (crashes):
  29306. - Avoid a rare assert that can trigger when Tor doesn't have much
  29307. directory information yet and it tries to fetch a v2 hidden
  29308. service descriptor. Fixes bug 651, reported by nwf.
  29309. - Initialize log mutex before initializing dmalloc. Otherwise,
  29310. running with dmalloc would crash. Bugfix on 0.2.0.x-alpha.
  29311. - Use recursive pthread mutexes in order to avoid deadlock when
  29312. logging debug-level messages to a controller. Bug spotted by nwf,
  29313. bugfix on 0.2.0.16-alpha.
  29314. o Minor bugfixes (resource management):
  29315. - Keep address policies from leaking memory: start their refcount
  29316. at 1, not 2. Bugfix on 0.2.0.16-alpha.
  29317. - Free authority certificates on exit, so they don't look like memory
  29318. leaks. Bugfix on 0.2.0.19-alpha.
  29319. - Free static hashtables for policy maps and for TLS connections on
  29320. shutdown, so they don't look like memory leaks. Bugfix on 0.2.0.x.
  29321. - Avoid allocating extra space when computing consensuses on 64-bit
  29322. platforms. Bug spotted by aakova.
  29323. o Minor bugfixes (misc):
  29324. - Do not read the configuration file when we've only been told to
  29325. generate a password hash. Fixes bug 643. Bugfix on 0.0.9pre5. Fix
  29326. based on patch from Sebastian Hahn.
  29327. - Exit relays that are used as a client can now reach themselves
  29328. using the .exit notation, rather than just launching an infinite
  29329. pile of circuits. Fixes bug 641. Reported by Sebastian Hahn.
  29330. - When attempting to open a logfile fails, tell us why.
  29331. - Fix a dumb bug that was preventing us from knowing that we should
  29332. preemptively build circuits to handle expected directory requests.
  29333. Fixes bug 660. Bugfix on 0.1.2.x.
  29334. - Warn less verbosely about clock skew from netinfo cells from
  29335. untrusted sources. Fixes bug 663.
  29336. - Make controller stream events for DNS requests more consistent,
  29337. by adding "new stream" events for DNS requests, and removing
  29338. spurious "stream closed" events" for cached reverse resolves.
  29339. Patch from mwenge. Fixes bug 646.
  29340. - Correctly notify one-hop connections when a circuit build has
  29341. failed. Possible fix for bug 669. Found by lodger.
  29342. Changes in version 0.2.0.23-rc - 2008-03-24
  29343. Tor 0.2.0.23-rc is the fourth release candidate for the 0.2.0 series. It
  29344. makes bootstrapping faster if the first directory mirror you contact
  29345. is down. The bundles also include the new Vidalia 0.1.2 release.
  29346. o Major bugfixes:
  29347. - When a tunneled directory request is made to a directory server
  29348. that's down, notice after 30 seconds rather than 120 seconds. Also,
  29349. fail any begindir streams that are pending on it, so they can
  29350. retry elsewhere. This was causing multi-minute delays on bootstrap.
  29351. Changes in version 0.2.0.22-rc - 2008-03-18
  29352. Tor 0.2.0.22-rc is the third release candidate for the 0.2.0 series. It
  29353. enables encrypted directory connections by default for non-relays, fixes
  29354. some broken TLS behavior we added in 0.2.0.20-rc, and resolves many
  29355. other bugs. The bundles also include Vidalia 0.1.1 and Torbutton 1.1.17.
  29356. o Major features:
  29357. - Enable encrypted directory connections by default for non-relays,
  29358. so censor tools that block Tor directory connections based on their
  29359. plaintext patterns will no longer work. This means Tor works in
  29360. certain censored countries by default again.
  29361. o Major bugfixes:
  29362. - Make sure servers always request certificates from clients during
  29363. TLS renegotiation. Reported by lodger; bugfix on 0.2.0.20-rc.
  29364. - Do not enter a CPU-eating loop when a connection is closed in
  29365. the middle of client-side TLS renegotiation. Fixes bug 622. Bug
  29366. diagnosed by lodger; bugfix on 0.2.0.20-rc.
  29367. - Fix assertion failure that could occur when a blocked circuit
  29368. became unblocked, and it had pending client DNS requests. Bugfix
  29369. on 0.2.0.1-alpha. Fixes bug 632.
  29370. o Minor bugfixes (on 0.1.2.x):
  29371. - Generate "STATUS_SERVER" events rather than misspelled
  29372. "STATUS_SEVER" events. Caught by mwenge.
  29373. - When counting the number of bytes written on a TLS connection,
  29374. look at the BIO actually used for writing to the network, not
  29375. at the BIO used (sometimes) to buffer data for the network.
  29376. Looking at different BIOs could result in write counts on the
  29377. order of ULONG_MAX. Fixes bug 614.
  29378. - On Windows, correctly detect errors when listing the contents of
  29379. a directory. Fix from lodger.
  29380. o Minor bugfixes (on 0.2.0.x):
  29381. - Downgrade "sslv3 alert handshake failure" message to INFO.
  29382. - If we set RelayBandwidthRate and RelayBandwidthBurst very high but
  29383. left BandwidthRate and BandwidthBurst at the default, we would be
  29384. silently limited by those defaults. Now raise them to match the
  29385. RelayBandwidth* values.
  29386. - Fix the SVK version detection logic to work correctly on a branch.
  29387. - Make --enable-openbsd-malloc work correctly on Linux with alpha
  29388. CPUs. Fixes bug 625.
  29389. - Logging functions now check that the passed severity is sane.
  29390. - Use proper log levels in the testsuite call of
  29391. get_interface_address6().
  29392. - When using a nonstandard malloc, do not use the platform values for
  29393. HAVE_MALLOC_GOOD_SIZE or HAVE_MALLOC_USABLE_SIZE.
  29394. - Make the openbsd malloc code use 8k pages on alpha CPUs and
  29395. 16k pages on ia64.
  29396. - Detect mismatched page sizes when using --enable-openbsd-malloc.
  29397. - Avoid double-marked-for-close warning when certain kinds of invalid
  29398. .in-addr.arpa addresses are passed to the DNSPort. Part of a fix
  29399. for bug 617. Bugfix on 0.2.0.1-alpha.
  29400. - Make sure that the "NULL-means-reject *:*" convention is followed by
  29401. all the policy manipulation functions, avoiding some possible crash
  29402. bugs. Bug found by lodger. Bugfix on 0.2.0.16-alpha.
  29403. - Fix the implementation of ClientDNSRejectInternalAddresses so that it
  29404. actually works, and doesn't warn about every single reverse lookup.
  29405. Fixes the other part of bug 617. Bugfix on 0.2.0.1-alpha.
  29406. o Minor features:
  29407. - Only log guard node status when guard node status has changed.
  29408. - Downgrade the 3 most common "INFO" messages to "DEBUG". This will
  29409. make "INFO" 75% less verbose.
  29410. Changes in version 0.2.0.21-rc - 2008-03-02
  29411. Tor 0.2.0.21-rc is the second release candidate for the 0.2.0 series. It
  29412. makes Tor work well with Vidalia again, fixes a rare assert bug,
  29413. and fixes a pair of more minor bugs. The bundles also include Vidalia
  29414. 0.1.0 and Torbutton 1.1.16.
  29415. o Major bugfixes:
  29416. - The control port should declare that it requires password auth
  29417. when HashedControlSessionPassword is set too. Patch from Matt Edman;
  29418. bugfix on 0.2.0.20-rc. Fixes bug 615.
  29419. - Downgrade assert in connection_buckets_decrement() to a log message.
  29420. This may help us solve bug 614, and in any case will make its
  29421. symptoms less severe. Bugfix on 0.2.0.20-rc. Reported by fredzupy.
  29422. - We were sometimes miscounting the number of bytes read from the
  29423. network, causing our rate limiting to not be followed exactly.
  29424. Bugfix on 0.2.0.16-alpha. Reported by lodger.
  29425. o Minor bugfixes:
  29426. - Fix compilation with OpenSSL 0.9.8 and 0.9.8a. All other supported
  29427. OpenSSL versions should have been working fine. Diagnosis and patch
  29428. from lodger, Karsten Loesing, and Sebastian Hahn. Fixes bug 616.
  29429. Bugfix on 0.2.0.20-rc.
  29430. Changes in version 0.2.0.20-rc - 2008-02-24
  29431. Tor 0.2.0.20-rc is the first release candidate for the 0.2.0 series. It
  29432. makes more progress towards normalizing Tor's TLS handshake, makes
  29433. hidden services work better again, helps relays bootstrap if they don't
  29434. know their IP address, adds optional support for linking in openbsd's
  29435. allocator or tcmalloc, allows really fast relays to scale past 15000
  29436. sockets, and fixes a bunch of minor bugs reported by Veracode.
  29437. o Major features:
  29438. - Enable the revised TLS handshake based on the one designed by
  29439. Steven Murdoch in proposal 124, as revised in proposal 130. It
  29440. includes version negotiation for OR connections as described in
  29441. proposal 105. The new handshake is meant to be harder for censors
  29442. to fingerprint, and it adds the ability to detect certain kinds of
  29443. man-in-the-middle traffic analysis attacks. The version negotiation
  29444. feature will allow us to improve Tor's link protocol more safely
  29445. in the future.
  29446. - Choose which bridge to use proportional to its advertised bandwidth,
  29447. rather than uniformly at random. This should speed up Tor for
  29448. bridge users. Also do this for people who set StrictEntryNodes.
  29449. - When a TrackHostExits-chosen exit fails too many times in a row,
  29450. stop using it. Bugfix on 0.1.2.x; fixes bug 437.
  29451. o Major bugfixes:
  29452. - Resolved problems with (re-)fetching hidden service descriptors.
  29453. Patch from Karsten Loesing; fixes problems with 0.2.0.18-alpha
  29454. and 0.2.0.19-alpha.
  29455. - If we only ever used Tor for hidden service lookups or posts, we
  29456. would stop building circuits and start refusing connections after
  29457. 24 hours, since we falsely believed that Tor was dormant. Reported
  29458. by nwf; bugfix on 0.1.2.x.
  29459. - Servers that don't know their own IP address should go to the
  29460. authorities for their first directory fetch, even if their DirPort
  29461. is off or if they don't know they're reachable yet. This will help
  29462. them bootstrap better. Bugfix on 0.2.0.18-alpha; fixes bug 609.
  29463. - When counting the number of open sockets, count not only the number
  29464. of sockets we have received from the socket() call, but also
  29465. the number we've gotten from accept() and socketpair(). This bug
  29466. made us fail to count all sockets that we were using for incoming
  29467. connections. Bugfix on 0.2.0.x.
  29468. - Fix code used to find strings within buffers, when those strings
  29469. are not in the first chunk of the buffer. Bugfix on 0.2.0.x.
  29470. - Fix potential segfault when parsing HTTP headers. Bugfix on 0.2.0.x.
  29471. - Add a new __HashedControlSessionPassword option for controllers
  29472. to use for one-off session password hashes that shouldn't get
  29473. saved to disk by SAVECONF --- Vidalia users were accumulating a
  29474. pile of HashedControlPassword lines in their torrc files, one for
  29475. each time they had restarted Tor and then clicked Save. Make Tor
  29476. automatically convert "HashedControlPassword" to this new option but
  29477. only when it's given on the command line. Partial fix for bug 586.
  29478. o Minor features (performance):
  29479. - Tune parameters for cell pool allocation to minimize amount of
  29480. RAM overhead used.
  29481. - Add OpenBSD malloc code from phk as an optional malloc
  29482. replacement on Linux: some glibc libraries do very poorly
  29483. with Tor's memory allocation patterns. Pass
  29484. --enable-openbsd-malloc to get the replacement malloc code.
  29485. - Add a --with-tcmalloc option to the configure script to link
  29486. against tcmalloc (if present). Does not yet search for
  29487. non-system include paths.
  29488. - Stop imposing an arbitrary maximum on the number of file descriptors
  29489. used for busy servers. Bug reported by Olaf Selke; patch from
  29490. Sebastian Hahn.
  29491. o Minor features (other):
  29492. - When SafeLogging is disabled, log addresses along with all TLS
  29493. errors.
  29494. - When building with --enable-gcc-warnings, check for whether Apple's
  29495. warning "-Wshorten-64-to-32" is available.
  29496. - Add a --passphrase-fd argument to the tor-gencert command for
  29497. scriptability.
  29498. o Minor bugfixes (memory leaks and code problems):
  29499. - We were leaking a file descriptor if Tor started with a zero-length
  29500. cached-descriptors file. Patch by freddy77; bugfix on 0.1.2.
  29501. - Detect size overflow in zlib code. Reported by Justin Ferguson and
  29502. Dan Kaminsky.
  29503. - We were comparing the raw BridgePassword entry with a base64'ed
  29504. version of it, when handling a "/tor/networkstatus-bridges"
  29505. directory request. Now compare correctly. Noticed by Veracode.
  29506. - Recover from bad tracked-since value in MTBF-history file.
  29507. Should fix bug 537.
  29508. - Alter the code that tries to recover from unhandled write
  29509. errors, to not try to flush onto a socket that's given us
  29510. unhandled errors. Bugfix on 0.1.2.x.
  29511. - Make Unix controlsockets work correctly on OpenBSD. Patch from
  29512. tup. Bugfix on 0.2.0.3-alpha.
  29513. o Minor bugfixes (other):
  29514. - If we have an extra-info document for our server, always make
  29515. it available on the control port, even if we haven't gotten
  29516. a copy of it from an authority yet. Patch from mwenge.
  29517. - Log the correct memory chunk sizes for empty RAM chunks in mempool.c.
  29518. - Directory mirrors no longer include a guess at the client's IP
  29519. address if the connection appears to be coming from the same /24
  29520. network; it was producing too many wrong guesses.
  29521. - Make the new hidden service code respect the SafeLogging setting.
  29522. Bugfix on 0.2.0.x. Patch from Karsten.
  29523. - When starting as an authority, do not overwrite all certificates
  29524. cached from other authorities. Bugfix on 0.2.0.x. Fixes bug 606.
  29525. - If we're trying to flush the last bytes on a connection (for
  29526. example, when answering a directory request), reset the
  29527. time-to-give-up timeout every time we manage to write something
  29528. on the socket. Bugfix on 0.1.2.x.
  29529. - Change the behavior of "getinfo status/good-server-descriptor"
  29530. so it doesn't return failure when any authority disappears.
  29531. - Even though the man page said that "TrackHostExits ." should
  29532. work, nobody had ever implemented it. Bugfix on 0.1.0.x.
  29533. - Report TLS "zero return" case as a "clean close" and "IO error"
  29534. as a "close". Stop calling closes "unexpected closes": existing
  29535. Tors don't use SSL_close(), so having a connection close without
  29536. the TLS shutdown handshake is hardly unexpected.
  29537. - Send NAMESERVER_STATUS messages for a single failed nameserver
  29538. correctly.
  29539. o Code simplifications and refactoring:
  29540. - Remove the tor_strpartition function: its logic was confused,
  29541. and it was only used for one thing that could be implemented far
  29542. more easily.
  29543. Changes in version 0.2.0.19-alpha - 2008-02-09
  29544. Tor 0.2.0.19-alpha makes more progress towards normalizing Tor's TLS
  29545. handshake, makes path selection for relays more secure and IP address
  29546. guessing more robust, and generally fixes a lot of bugs in preparation
  29547. for calling the 0.2.0 branch stable.
  29548. o Major features:
  29549. - Do not include recognizeable strings in the commonname part of
  29550. Tor's x509 certificates.
  29551. o Major bugfixes:
  29552. - If we're a relay, avoid picking ourselves as an introduction point,
  29553. a rendezvous point, or as the final hop for internal circuits. Bug
  29554. reported by taranis and lodger. Bugfix on 0.1.2.x.
  29555. - Patch from "Andrew S. Lists" to catch when we contact a directory
  29556. mirror at IP address X and he says we look like we're coming from
  29557. IP address X. Bugfix on 0.1.2.x.
  29558. o Minor features (security):
  29559. - Be more paranoid about overwriting sensitive memory on free(),
  29560. as a defensive programming tactic to ensure forward secrecy.
  29561. o Minor features (directory authority):
  29562. - Actually validate the options passed to AuthDirReject,
  29563. AuthDirInvalid, AuthDirBadDir, and AuthDirBadExit.
  29564. - Reject router descriptors with out-of-range bandwidthcapacity or
  29565. bandwidthburst values.
  29566. o Minor features (controller):
  29567. - Reject controller commands over 1MB in length. This keeps rogue
  29568. processes from running us out of memory.
  29569. o Minor features (misc):
  29570. - Give more descriptive well-formedness errors for out-of-range
  29571. hidden service descriptor/protocol versions.
  29572. - Make memory debugging information describe more about history
  29573. of cell allocation, so we can help reduce our memory use.
  29574. o Deprecated features (controller):
  29575. - The status/version/num-versioning and status/version/num-concurring
  29576. GETINFO options are no longer useful in the v3 directory protocol:
  29577. treat them as deprecated, and warn when they're used.
  29578. o Minor bugfixes:
  29579. - When our consensus networkstatus has been expired for a while, stop
  29580. being willing to build circuits using it. Fixes bug 401. Bugfix
  29581. on 0.1.2.x.
  29582. - Directory caches now fetch certificates from all authorities
  29583. listed in a networkstatus consensus, even when they do not
  29584. recognize them. Fixes bug 571. Bugfix on 0.2.0.x.
  29585. - When connecting to a bridge without specifying its key, insert
  29586. the connection into the identity-to-connection map as soon as
  29587. a key is learned. Fixes bug 574. Bugfix on 0.2.0.x.
  29588. - Detect versions of OS X where malloc_good_size() is present in the
  29589. library but never actually declared. Resolves bug 587. Bugfix
  29590. on 0.2.0.x.
  29591. - Stop incorrectly truncating zlib responses to directory authority
  29592. signature download requests. Fixes bug 593. Bugfix on 0.2.0.x.
  29593. - Stop recommending that every server operator send mail to tor-ops.
  29594. Resolves bug 597. Bugfix on 0.1.2.x.
  29595. - Don't trigger an assert if we start a directory authority with a
  29596. private IP address (like 127.0.0.1).
  29597. - Avoid possible failures when generating a directory with routers
  29598. with over-long versions strings, or too many flags set. Bugfix
  29599. on 0.1.2.x.
  29600. - If an attempt to launch a DNS resolve request over the control
  29601. port fails because we have overrun the limit on the number of
  29602. connections, tell the controller that the request has failed.
  29603. - Avoid using too little bandwidth when our clock skips a few
  29604. seconds. Bugfix on 0.1.2.x.
  29605. - Fix shell error when warning about missing packages in configure
  29606. script, on Fedora or Red Hat machines. Bugfix on 0.2.0.x.
  29607. - Do not become confused when receiving a spurious VERSIONS-like
  29608. cell from a confused v1 client. Bugfix on 0.2.0.x.
  29609. - Re-fetch v2 (as well as v0) rendezvous descriptors when all
  29610. introduction points for a hidden service have failed. Patch from
  29611. Karsten Loesing. Bugfix on 0.2.0.x.
  29612. o Code simplifications and refactoring:
  29613. - Remove some needless generality from cpuworker code, for improved
  29614. type-safety.
  29615. - Stop overloading the circuit_t.onionskin field for both "onionskin
  29616. from a CREATE cell that we are waiting for a cpuworker to be
  29617. assigned" and "onionskin from an EXTEND cell that we are going to
  29618. send to an OR as soon as we are connected". Might help with bug 600.
  29619. - Add an in-place version of aes_crypt() so that we can avoid doing a
  29620. needless memcpy() call on each cell payload.
  29621. Changes in version 0.2.0.18-alpha - 2008-01-25
  29622. Tor 0.2.0.18-alpha adds a sixth v3 directory authority run by CCC,
  29623. fixes a big memory leak in 0.2.0.17-alpha, and adds new config options
  29624. that can warn or reject connections to ports generally associated with
  29625. vulnerable-plaintext protocols.
  29626. o New directory authorities:
  29627. - Set up dannenberg (run by CCC) as the sixth v3 directory
  29628. authority.
  29629. o Major bugfixes:
  29630. - Fix a major memory leak when attempting to use the v2 TLS
  29631. handshake code. Bugfix on 0.2.0.x; fixes bug 589.
  29632. - We accidentally enabled the under-development v2 TLS handshake
  29633. code, which was causing log entries like "TLS error while
  29634. renegotiating handshake". Disable it again. Resolves bug 590.
  29635. - We were computing the wrong Content-Length: header for directory
  29636. responses that need to be compressed on the fly, causing clients
  29637. asking for those items to always fail. Bugfix on 0.2.0.x; partially
  29638. fixes bug 593.
  29639. o Major features:
  29640. - Avoid going directly to the directory authorities even if you're a
  29641. relay, if you haven't found yourself reachable yet or if you've
  29642. decided not to advertise your dirport yet. Addresses bug 556.
  29643. - If we've gone 12 hours since our last bandwidth check, and we
  29644. estimate we have less than 50KB bandwidth capacity but we could
  29645. handle more, do another bandwidth test.
  29646. - New config options WarnPlaintextPorts and RejectPlaintextPorts so
  29647. Tor can warn and/or refuse connections to ports commonly used with
  29648. vulnerable-plaintext protocols. Currently we warn on ports 23,
  29649. 109, 110, and 143, but we don't reject any.
  29650. o Minor bugfixes:
  29651. - When we setconf ClientOnly to 1, close any current OR and Dir
  29652. listeners. Reported by mwenge.
  29653. - When we get a consensus that's been signed by more people than
  29654. we expect, don't log about it; it's not a big deal. Reported
  29655. by Kyle Williams.
  29656. o Minor features:
  29657. - Don't answer "/tor/networkstatus-bridges" directory requests if
  29658. the request isn't encrypted.
  29659. - Make "ClientOnly 1" config option disable directory ports too.
  29660. - Patches from Karsten Loesing to make v2 hidden services more
  29661. robust: work even when there aren't enough HSDir relays available;
  29662. retry when a v2 rend desc fetch fails; but don't retry if we
  29663. already have a usable v0 rend desc.
  29664. Changes in version 0.2.0.17-alpha - 2008-01-17
  29665. Tor 0.2.0.17-alpha makes the tarball build cleanly again (whoops).
  29666. o Compile fixes:
  29667. - Make the tor-gencert man page get included correctly in the tarball.
  29668. Changes in version 0.2.0.16-alpha - 2008-01-17
  29669. Tor 0.2.0.16-alpha adds a fifth v3 directory authority run by Karsten
  29670. Loesing, and generally cleans up a lot of features and minor bugs.
  29671. o New directory authorities:
  29672. - Set up gabelmoo (run by Karsten Loesing) as the fifth v3 directory
  29673. authority.
  29674. o Major performance improvements:
  29675. - Switch our old ring buffer implementation for one more like that
  29676. used by free Unix kernels. The wasted space in a buffer with 1mb
  29677. of data will now be more like 8k than 1mb. The new implementation
  29678. also avoids realloc();realloc(); patterns that can contribute to
  29679. memory fragmentation.
  29680. o Minor features:
  29681. - Configuration files now accept C-style strings as values. This
  29682. helps encode characters not allowed in the current configuration
  29683. file format, such as newline or #. Addresses bug 557.
  29684. - Although we fixed bug 539 (where servers would send HTTP status 503
  29685. responses _and_ send a body too), there are still servers out
  29686. there that haven't upgraded. Therefore, make clients parse such
  29687. bodies when they receive them.
  29688. - When we're not serving v2 directory information, there is no reason
  29689. to actually keep any around. Remove the obsolete files and directory
  29690. on startup if they are very old and we aren't going to serve them.
  29691. o Minor performance improvements:
  29692. - Reference-count and share copies of address policy entries; only 5%
  29693. of them were actually distinct.
  29694. - Never walk through the list of logs if we know that no log is
  29695. interested in a given message.
  29696. o Minor bugfixes:
  29697. - When an authority has not signed a consensus, do not try to
  29698. download a nonexistent "certificate with key 00000000". Bugfix
  29699. on 0.2.0.x. Fixes bug 569.
  29700. - Fix a rare assert error when we're closing one of our threads:
  29701. use a mutex to protect the list of logs, so we never write to the
  29702. list as it's being freed. Bugfix on 0.1.2.x. Fixes the very rare
  29703. bug 575, which is kind of the revenge of bug 222.
  29704. - Patch from Karsten Loesing to complain less at both the client
  29705. and the relay when a relay used to have the HSDir flag but doesn't
  29706. anymore, and we try to upload a hidden service descriptor.
  29707. - Stop leaking one cert per TLS context. Fixes bug 582. Bugfix on
  29708. 0.2.0.15-alpha.
  29709. - Do not try to download missing certificates until we have tried
  29710. to check our fallback consensus. Fixes bug 583.
  29711. - Make bridges round reported GeoIP stats info up to the nearest
  29712. estimate, not down. Now we can distinguish between "0 people from
  29713. this country" and "1 person from this country".
  29714. - Avoid a spurious free on base64 failure. Bugfix on 0.1.2.
  29715. - Avoid possible segfault if key generation fails in
  29716. crypto_pk_hybrid_encrypt. Bugfix on 0.2.0.
  29717. - Avoid segfault in the case where a badly behaved v2 versioning
  29718. directory sends a signed networkstatus with missing client-versions.
  29719. Bugfix on 0.1.2.
  29720. - Avoid segfaults on certain complex invocations of
  29721. router_get_by_hexdigest(). Bugfix on 0.1.2.
  29722. - Correct bad index on array access in parse_http_time(). Bugfix
  29723. on 0.2.0.
  29724. - Fix possible bug in vote generation when server versions are present
  29725. but client versions are not.
  29726. - Fix rare bug on REDIRECTSTREAM control command when called with no
  29727. port set: it could erroneously report an error when none had
  29728. happened.
  29729. - Avoid bogus crash-prone, leak-prone tor_realloc when we're
  29730. compressing large objects and find ourselves with more than 4k
  29731. left over. Bugfix on 0.2.0.
  29732. - Fix a small memory leak when setting up a hidden service.
  29733. - Fix a few memory leaks that could in theory happen under bizarre
  29734. error conditions.
  29735. - Fix an assert if we post a general-purpose descriptor via the
  29736. control port but that descriptor isn't mentioned in our current
  29737. network consensus. Bug reported by Jon McLachlan; bugfix on
  29738. 0.2.0.9-alpha.
  29739. o Minor features (controller):
  29740. - Get NS events working again. Patch from tup.
  29741. - The GETCONF command now escapes and quotes configuration values
  29742. that don't otherwise fit into the torrc file.
  29743. - The SETCONF command now handles quoted values correctly.
  29744. o Minor features (directory authorities):
  29745. - New configuration options to override default maximum number of
  29746. servers allowed on a single IP address. This is important for
  29747. running a test network on a single host.
  29748. - Actually implement the -s option to tor-gencert.
  29749. - Add a manual page for tor-gencert.
  29750. o Minor features (bridges):
  29751. - Bridge authorities no longer serve bridge descriptors over
  29752. unencrypted connections.
  29753. o Minor features (other):
  29754. - Add hidden services and DNSPorts to the list of things that make
  29755. Tor accept that it has running ports. Change starting Tor with no
  29756. ports from a fatal error to a warning; we might change it back if
  29757. this turns out to confuse anybody. Fixes bug 579.
  29758. Changes in version 0.1.2.19 - 2008-01-17
  29759. Tor 0.1.2.19 fixes a huge memory leak on exit relays, makes the default
  29760. exit policy a little bit more conservative so it's safer to run an
  29761. exit relay on a home system, and fixes a variety of smaller issues.
  29762. o Security fixes:
  29763. - Exit policies now reject connections that are addressed to a
  29764. relay's public (external) IP address too, unless
  29765. ExitPolicyRejectPrivate is turned off. We do this because too
  29766. many relays are running nearby to services that trust them based
  29767. on network address.
  29768. o Major bugfixes:
  29769. - When the clock jumps forward a lot, do not allow the bandwidth
  29770. buckets to become negative. Fixes bug 544.
  29771. - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
  29772. on every successful resolve. Reported by Mike Perry.
  29773. - Purge old entries from the "rephist" database and the hidden
  29774. service descriptor database even when DirPort is zero.
  29775. - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
  29776. requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
  29777. crashing or mis-answering these requests.
  29778. - When we decide to send a 503 response to a request for servers, do
  29779. not then also send the server descriptors: this defeats the whole
  29780. purpose. Fixes bug 539.
  29781. o Minor bugfixes:
  29782. - Changing the ExitPolicyRejectPrivate setting should cause us to
  29783. rebuild our server descriptor.
  29784. - Fix handling of hex nicknames when answering controller requests for
  29785. networkstatus by name, or when deciding whether to warn about
  29786. unknown routers in a config option. (Patch from mwenge.)
  29787. - Fix a couple of hard-to-trigger autoconf problems that could result
  29788. in really weird results on platforms whose sys/types.h files define
  29789. nonstandard integer types.
  29790. - Don't try to create the datadir when running --verify-config or
  29791. --hash-password. Resolves bug 540.
  29792. - If we were having problems getting a particular descriptor from the
  29793. directory caches, and then we learned about a new descriptor for
  29794. that router, we weren't resetting our failure count. Reported
  29795. by lodger.
  29796. - Although we fixed bug 539 (where servers would send HTTP status 503
  29797. responses _and_ send a body too), there are still servers out there
  29798. that haven't upgraded. Therefore, make clients parse such bodies
  29799. when they receive them.
  29800. - Run correctly on systems where rlim_t is larger than unsigned long.
  29801. This includes some 64-bit systems.
  29802. - Run correctly on platforms (like some versions of OS X 10.5) where
  29803. the real limit for number of open files is OPEN_FILES, not rlim_max
  29804. from getrlimit(RLIMIT_NOFILES).
  29805. - Avoid a spurious free on base64 failure.
  29806. - Avoid segfaults on certain complex invocations of
  29807. router_get_by_hexdigest().
  29808. - Fix rare bug on REDIRECTSTREAM control command when called with no
  29809. port set: it could erroneously report an error when none had
  29810. happened.
  29811. Changes in version 0.2.0.15-alpha - 2007-12-25
  29812. Tor 0.2.0.14-alpha and 0.2.0.15-alpha fix a bunch of bugs with the
  29813. features added in 0.2.0.13-alpha.
  29814. o Major bugfixes:
  29815. - Fix several remotely triggerable asserts based on DirPort requests
  29816. for a v2 or v3 networkstatus object before we were prepared. This
  29817. was particularly bad for 0.2.0.13 and later bridge relays, who
  29818. would never have a v2 networkstatus and would thus always crash
  29819. when used. Bugfixes on 0.2.0.x.
  29820. - Estimate the v3 networkstatus size more accurately, rather than
  29821. estimating it at zero bytes and giving it artificially high priority
  29822. compared to other directory requests. Bugfix on 0.2.0.x.
  29823. o Minor bugfixes:
  29824. - Fix configure.in logic for cross-compilation.
  29825. - When we load a bridge descriptor from the cache, and it was
  29826. previously unreachable, mark it as retriable so we won't just
  29827. ignore it. Also, try fetching a new copy immediately. Bugfixes
  29828. on 0.2.0.13-alpha.
  29829. - The bridge GeoIP stats were counting other relays, for example
  29830. self-reachability and authority-reachability tests.
  29831. o Minor features:
  29832. - Support compilation to target iPhone; patch from cjacker huang.
  29833. To build for iPhone, pass the --enable-iphone option to configure.
  29834. Changes in version 0.2.0.14-alpha - 2007-12-23
  29835. o Major bugfixes:
  29836. - Fix a crash on startup if you install Tor 0.2.0.13-alpha fresh
  29837. without a datadirectory from a previous Tor install. Reported
  29838. by Zax.
  29839. - Fix a crash when we fetch a descriptor that turns out to be
  29840. unexpected (it used to be in our networkstatus when we started
  29841. fetching it, but it isn't in our current networkstatus), and we
  29842. aren't using bridges. Bugfix on 0.2.0.x.
  29843. - Fix a crash when accessing hidden services: it would work the first
  29844. time you use a given introduction point for your service, but
  29845. on subsequent requests we'd be using garbage memory. Fixed by
  29846. Karsten Loesing. Bugfix on 0.2.0.13-alpha.
  29847. - Fix a crash when we load a bridge descriptor from disk but we don't
  29848. currently have a Bridge line for it in our torrc. Bugfix on
  29849. 0.2.0.13-alpha.
  29850. o Major features:
  29851. - If bridge authorities set BridgePassword, they will serve a
  29852. snapshot of known bridge routerstatuses from their DirPort to
  29853. anybody who knows that password. Unset by default.
  29854. o Minor bugfixes:
  29855. - Make the unit tests build again.
  29856. - Make "GETINFO/desc-annotations/id/<OR digest>" actually work.
  29857. - Make PublishServerDescriptor default to 1, so the default doesn't
  29858. have to change as we invent new directory protocol versions.
  29859. - Fix test for rlim_t on OSX 10.3: sys/resource.h doesn't want to
  29860. be included unless sys/time.h is already included. Fixes
  29861. bug 553. Bugfix on 0.2.0.x.
  29862. - If we receive a general-purpose descriptor and then receive an
  29863. identical bridge-purpose descriptor soon after, don't discard
  29864. the next one as a duplicate.
  29865. o Minor features:
  29866. - If BridgeRelay is set to 1, then the default for
  29867. PublishServerDescriptor is now "bridge" rather than "v2,v3".
  29868. - If the user sets RelayBandwidthRate but doesn't set
  29869. RelayBandwidthBurst, then make them equal rather than erroring out.
  29870. Changes in version 0.2.0.13-alpha - 2007-12-21
  29871. Tor 0.2.0.13-alpha adds a fourth v3 directory authority run by Geoff
  29872. Goodell, fixes many more bugs, and adds a lot of infrastructure for
  29873. upcoming features.
  29874. o New directory authorities:
  29875. - Set up lefkada (run by Geoff Goodell) as the fourth v3 directory
  29876. authority.
  29877. o Major bugfixes:
  29878. - Only update guard status (usable / not usable) once we have
  29879. enough directory information. This was causing us to always pick
  29880. two new guards on startup (bugfix on 0.2.0.9-alpha), and it was
  29881. causing us to discard all our guards on startup if we hadn't been
  29882. running for a few weeks (bugfix on 0.1.2.x). Fixes bug 448.
  29883. - Purge old entries from the "rephist" database and the hidden
  29884. service descriptor databases even when DirPort is zero. Bugfix
  29885. on 0.1.2.x.
  29886. - We were ignoring our RelayBandwidthRate for the first 30 seconds
  29887. after opening a circuit -- even a relayed circuit. Bugfix on
  29888. 0.2.0.3-alpha.
  29889. - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
  29890. requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
  29891. crashing or mis-answering these types of requests.
  29892. - Relays were publishing their server descriptor to v1 and v2
  29893. directory authorities, but they didn't try publishing to v3-only
  29894. authorities. Fix this; and also stop publishing to v1 authorities.
  29895. Bugfix on 0.2.0.x.
  29896. - When we were reading router descriptors from cache, we were ignoring
  29897. the annotations -- so for example we were reading in bridge-purpose
  29898. descriptors as general-purpose descriptors. Bugfix on 0.2.0.8-alpha.
  29899. - When we decided to send a 503 response to a request for servers, we
  29900. were then also sending the server descriptors: this defeats the
  29901. whole purpose. Fixes bug 539; bugfix on 0.1.2.x.
  29902. o Major features:
  29903. - Bridge relays now behave like clients with respect to time
  29904. intervals for downloading new consensus documents -- otherwise they
  29905. stand out. Bridge users now wait until the end of the interval,
  29906. so their bridge relay will be sure to have a new consensus document.
  29907. - Three new config options (AlternateDirAuthority,
  29908. AlternateBridgeAuthority, and AlternateHSAuthority) that let the
  29909. user selectively replace the default directory authorities by type,
  29910. rather than the all-or-nothing replacement that DirServer offers.
  29911. - Tor can now be configured to read a GeoIP file from disk in one
  29912. of two formats. This can be used by controllers to map IP addresses
  29913. to countries. Eventually, it may support exit-by-country.
  29914. - When possible, bridge relays remember which countries users
  29915. are coming from, and report aggregate information in their
  29916. extra-info documents, so that the bridge authorities can learn
  29917. where Tor is blocked.
  29918. - Bridge directory authorities now do reachability testing on the
  29919. bridges they know. They provide router status summaries to the
  29920. controller via "getinfo ns/purpose/bridge", and also dump summaries
  29921. to a file periodically.
  29922. - Stop fetching directory info so aggressively if your DirPort is
  29923. on but your ORPort is off; stop fetching v2 dir info entirely.
  29924. You can override these choices with the new FetchDirInfoEarly
  29925. config option.
  29926. o Minor bugfixes:
  29927. - The fix in 0.2.0.12-alpha cleared the "hsdir" flag in v3 network
  29928. consensus documents when there are too many relays at a single
  29929. IP address. Now clear it in v2 network status documents too, and
  29930. also clear it in routerinfo_t when the relay is no longer listed
  29931. in the relevant networkstatus document.
  29932. - Don't crash if we get an unexpected value for the
  29933. PublishServerDescriptor config option. Reported by Matt Edman;
  29934. bugfix on 0.2.0.9-alpha.
  29935. - Our new v2 hidden service descriptor format allows descriptors
  29936. that have no introduction points. But Tor crashed when we tried
  29937. to build a descriptor with no intro points (and it would have
  29938. crashed if we had tried to parse one). Bugfix on 0.2.0.x; patch
  29939. by Karsten Loesing.
  29940. - Fix building with dmalloc 5.5.2 with glibc.
  29941. - Reject uploaded descriptors and extrainfo documents if they're
  29942. huge. Otherwise we'll cache them all over the network and it'll
  29943. clog everything up. Reported by Aljosha Judmayer.
  29944. - Check for presence of s6_addr16 and s6_addr32 fields in in6_addr
  29945. via autoconf. Should fix compile on solaris. Bugfix on 0.2.0.x.
  29946. - When the DANGEROUS_VERSION controller status event told us we're
  29947. running an obsolete version, it used the string "OLD" to describe
  29948. it. Yet the "getinfo" interface used the string "OBSOLETE". Now use
  29949. "OBSOLETE" in both cases. Bugfix on 0.1.2.x.
  29950. - If we can't expand our list of entry guards (e.g. because we're
  29951. using bridges or we have StrictEntryNodes set), don't mark relays
  29952. down when they fail a directory request. Otherwise we're too quick
  29953. to mark all our entry points down. Bugfix on 0.1.2.x.
  29954. - Fix handling of hex nicknames when answering controller requests for
  29955. networkstatus by name, or when deciding whether to warn about unknown
  29956. routers in a config option. Bugfix on 0.1.2.x. (Patch from mwenge.)
  29957. - Fix a couple of hard-to-trigger autoconf problems that could result
  29958. in really weird results on platforms whose sys/types.h files define
  29959. nonstandard integer types. Bugfix on 0.1.2.x.
  29960. - Fix compilation with --disable-threads set. Bugfix on 0.2.0.x.
  29961. - Don't crash on name lookup when we have no current consensus. Fixes
  29962. bug 538; bugfix on 0.2.0.x.
  29963. - Only Tors that want to mirror the v2 directory info should
  29964. create the "cached-status" directory in their datadir. (All Tors
  29965. used to create it.) Bugfix on 0.2.0.9-alpha.
  29966. - Directory authorities should only automatically download Extra Info
  29967. documents if they're v1, v2, or v3 authorities. Bugfix on 0.1.2.x.
  29968. o Minor features:
  29969. - On the USR1 signal, when dmalloc is in use, log the top 10 memory
  29970. consumers. (We already do this on HUP.)
  29971. - Authorities and caches fetch the v2 networkstatus documents
  29972. less often, now that v3 is encouraged.
  29973. - Add a new config option BridgeRelay that specifies you want to
  29974. be a bridge relay. Right now the only difference is that it makes
  29975. you answer begin_dir requests, and it makes you cache dir info,
  29976. even if your DirPort isn't on.
  29977. - Add "GETINFO/desc-annotations/id/<OR digest>" so controllers can
  29978. ask about source, timestamp of arrival, purpose, etc. We need
  29979. something like this to help Vidalia not do GeoIP lookups on bridge
  29980. addresses.
  29981. - Allow multiple HashedControlPassword config lines, to support
  29982. multiple controller passwords.
  29983. - Authorities now decide whether they're authoritative for a given
  29984. router based on the router's purpose.
  29985. - New config options AuthDirBadDir and AuthDirListBadDirs for
  29986. authorities to mark certain relays as "bad directories" in the
  29987. networkstatus documents. Also supports the "!baddir" directive in
  29988. the approved-routers file.
  29989. Changes in version 0.2.0.12-alpha - 2007-11-16
  29990. This twelfth development snapshot fixes some more build problems as
  29991. well as a few minor bugs.
  29992. o Compile fixes:
  29993. - Make it build on OpenBSD again. Patch from tup.
  29994. - Substitute BINDIR and LOCALSTATEDIR in scripts. Fixes
  29995. package-building for Red Hat, OS X, etc.
  29996. o Minor bugfixes (on 0.1.2.x):
  29997. - Changing the ExitPolicyRejectPrivate setting should cause us to
  29998. rebuild our server descriptor.
  29999. o Minor bugfixes (on 0.2.0.x):
  30000. - When we're lacking a consensus, don't try to perform rendezvous
  30001. operations. Reported by Karsten Loesing.
  30002. - Fix a small memory leak whenever we decide against using a
  30003. newly picked entry guard. Reported by Mike Perry.
  30004. - When authorities detected more than two relays running on the same
  30005. IP address, they were clearing all the status flags but forgetting
  30006. to clear the "hsdir" flag. So clients were being told that a
  30007. given relay was the right choice for a v2 hsdir lookup, yet they
  30008. never had its descriptor because it was marked as 'not running'
  30009. in the consensus.
  30010. - If we're trying to fetch a bridge descriptor and there's no way
  30011. the bridge authority could help us (for example, we don't know
  30012. a digest, or there is no bridge authority), don't be so eager to
  30013. fall back to asking the bridge authority.
  30014. - If we're using bridges or have strictentrynodes set, and our
  30015. chosen exit is in the same family as all our bridges/entry guards,
  30016. then be flexible about families.
  30017. o Minor features:
  30018. - When we negotiate a v2 link-layer connection (not yet implemented),
  30019. accept RELAY_EARLY cells and turn them into RELAY cells if we've
  30020. negotiated a v1 connection for their next step. Initial code for
  30021. proposal 110.
  30022. Changes in version 0.2.0.11-alpha - 2007-11-12
  30023. This eleventh development snapshot fixes some build problems with
  30024. the previous snapshot. It also includes a more secure-by-default exit
  30025. policy for relays, fixes an enormous memory leak for exit relays, and
  30026. fixes another bug where servers were falling out of the directory list.
  30027. o Security fixes:
  30028. - Exit policies now reject connections that are addressed to a
  30029. relay's public (external) IP address too, unless
  30030. ExitPolicyRejectPrivate is turned off. We do this because too
  30031. many relays are running nearby to services that trust them based
  30032. on network address. Bugfix on 0.1.2.x.
  30033. o Major bugfixes:
  30034. - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
  30035. on every successful resolve. Reported by Mike Perry; bugfix
  30036. on 0.1.2.x.
  30037. - On authorities, never downgrade to old router descriptors simply
  30038. because they're listed in the consensus. This created a catch-22
  30039. where we wouldn't list a new descriptor because there was an
  30040. old one in the consensus, and we couldn't get the new one in the
  30041. consensus because we wouldn't list it. Possible fix for bug 548.
  30042. Also, this might cause bug 543 to appear on authorities; if so,
  30043. we'll need a band-aid for that. Bugfix on 0.2.0.9-alpha.
  30044. o Packaging fixes on 0.2.0.10-alpha:
  30045. - We were including instructions about what to do with the
  30046. src/config/fallback-consensus file, but we weren't actually
  30047. including it in the tarball. Disable all of that for now.
  30048. o Minor features:
  30049. - Allow people to say PreferTunnelledDirConns rather than
  30050. PreferTunneledDirConns, for those alternate-spellers out there.
  30051. o Minor bugfixes:
  30052. - Don't reevaluate all the information from our consensus document
  30053. just because we've downloaded a v2 networkstatus that we intend
  30054. to cache. Fixes bug 545; bugfix on 0.2.0.x.
  30055. Changes in version 0.2.0.10-alpha - 2007-11-10
  30056. This tenth development snapshot adds a third v3 directory authority
  30057. run by Mike Perry, adds most of Karsten Loesing's new hidden service
  30058. descriptor format, fixes a bad crash bug and new bridge bugs introduced
  30059. in 0.2.0.9-alpha, fixes many bugs with the v3 directory implementation,
  30060. fixes some minor memory leaks in previous 0.2.0.x snapshots, and
  30061. addresses many more minor issues.
  30062. o New directory authorities:
  30063. - Set up ides (run by Mike Perry) as the third v3 directory authority.
  30064. o Major features:
  30065. - Allow tunnelled directory connections to ask for an encrypted
  30066. "begin_dir" connection or an anonymized "uses a full Tor circuit"
  30067. connection independently. Now we can make anonymized begin_dir
  30068. connections for (e.g.) more secure hidden service posting and
  30069. fetching.
  30070. - More progress on proposal 114: code from Karsten Loesing to
  30071. implement new hidden service descriptor format.
  30072. - Raise the default BandwidthRate/BandwidthBurst to 5MB/10MB, to
  30073. accommodate the growing number of servers that use the default
  30074. and are reaching it.
  30075. - Directory authorities use a new formula for selecting which nodes
  30076. to advertise as Guards: they must be in the top 7/8 in terms of
  30077. how long we have known about them, and above the median of those
  30078. nodes in terms of weighted fractional uptime.
  30079. - Make "not enough dir info yet" warnings describe *why* Tor feels
  30080. it doesn't have enough directory info yet.
  30081. o Major bugfixes:
  30082. - Stop servers from crashing if they set a Family option (or
  30083. maybe in other situations too). Bugfix on 0.2.0.9-alpha; reported
  30084. by Fabian Keil.
  30085. - Make bridge users work again -- the move to v3 directories in
  30086. 0.2.0.9-alpha had introduced a number of bugs that made bridges
  30087. no longer work for clients.
  30088. - When the clock jumps forward a lot, do not allow the bandwidth
  30089. buckets to become negative. Bugfix on 0.1.2.x; fixes bug 544.
  30090. o Major bugfixes (v3 dir, bugfixes on 0.2.0.9-alpha):
  30091. - When the consensus lists a router descriptor that we previously were
  30092. mirroring, but that we considered non-canonical, reload the
  30093. descriptor as canonical. This fixes bug 543 where Tor servers
  30094. would start complaining after a few days that they don't have
  30095. enough directory information to build a circuit.
  30096. - Consider replacing the current consensus when certificates arrive
  30097. that make the pending consensus valid. Previously, we were only
  30098. considering replacement when the new certs _didn't_ help.
  30099. - Fix an assert error on startup if we didn't already have the
  30100. consensus and certs cached in our datadirectory: we were caching
  30101. the consensus in consensus_waiting_for_certs but then free'ing it
  30102. right after.
  30103. - Avoid sending a request for "keys/fp" (for which we'll get a 400 Bad
  30104. Request) if we need more v3 certs but we've already got pending
  30105. requests for all of them.
  30106. - Correctly back off from failing certificate downloads. Fixes
  30107. bug 546.
  30108. - Authorities don't vote on the Running flag if they have been running
  30109. for less than 30 minutes themselves. Fixes bug 547, where a newly
  30110. started authority would vote that everyone was down.
  30111. o New requirements:
  30112. - Drop support for OpenSSL version 0.9.6. Just about nobody was using
  30113. it, it had no AES, and it hasn't seen any security patches since
  30114. 2004.
  30115. o Minor features:
  30116. - Clients now hold circuitless TLS connections open for 1.5 times
  30117. MaxCircuitDirtiness (15 minutes), since it is likely that they'll
  30118. rebuild a new circuit over them within that timeframe. Previously,
  30119. they held them open only for KeepalivePeriod (5 minutes).
  30120. - Use "If-Modified-Since" to avoid retrieving consensus
  30121. networkstatuses that we already have.
  30122. - When we have no consensus, check FallbackNetworkstatusFile (defaults
  30123. to $PREFIX/share/tor/fallback-consensus) for a consensus. This way
  30124. we start knowing some directory caches.
  30125. - When we receive a consensus from the future, warn about skew.
  30126. - Improve skew reporting: try to give the user a better log message
  30127. about how skewed they are, and how much this matters.
  30128. - When we have a certificate for an authority, believe that
  30129. certificate's claims about the authority's IP address.
  30130. - New --quiet command-line option to suppress the default console log.
  30131. Good in combination with --hash-password.
  30132. - Authorities send back an X-Descriptor-Not-New header in response to
  30133. an accepted-but-discarded descriptor upload. Partially implements
  30134. fix for bug 535.
  30135. - Make the log message for "tls error. breaking." more useful.
  30136. - Better log messages about certificate downloads, to attempt to
  30137. track down the second incarnation of bug 546.
  30138. o Minor features (bridges):
  30139. - If bridge users set UpdateBridgesFromAuthority, but the digest
  30140. they ask for is a 404 from the bridge authority, they now fall
  30141. back to trying the bridge directly.
  30142. - Bridges now use begin_dir to publish their server descriptor to
  30143. the bridge authority, even when they haven't set TunnelDirConns.
  30144. o Minor features (controller):
  30145. - When reporting clock skew, and we know that the clock is _at least
  30146. as skewed_ as some value, but we don't know the actual value,
  30147. report the value as a "minimum skew."
  30148. o Utilities:
  30149. - Update linux-tor-prio.sh script to allow QoS based on the uid of
  30150. the Tor process. Patch from Marco Bonetti with tweaks from Mike
  30151. Perry.
  30152. o Minor bugfixes:
  30153. - Refuse to start if both ORPort and UseBridges are set. Bugfix
  30154. on 0.2.0.x, suggested by Matt Edman.
  30155. - Don't stop fetching descriptors when FetchUselessDescriptors is
  30156. set, even if we stop asking for circuits. Bugfix on 0.1.2.x;
  30157. reported by tup and ioerror.
  30158. - Better log message on vote from unknown authority.
  30159. - Don't log "Launching 0 request for 0 router" message.
  30160. o Minor bugfixes (memory leaks):
  30161. - Stop leaking memory every time we parse a v3 certificate. Bugfix
  30162. on 0.2.0.1-alpha.
  30163. - Stop leaking memory every time we load a v3 certificate. Bugfix
  30164. on 0.2.0.1-alpha. Fixes bug 536.
  30165. - Stop leaking a cached networkstatus on exit. Bugfix on
  30166. 0.2.0.3-alpha.
  30167. - Stop leaking voter information every time we free a consensus.
  30168. Bugfix on 0.2.0.3-alpha.
  30169. - Stop leaking signed data every time we check a voter signature.
  30170. Bugfix on 0.2.0.3-alpha.
  30171. - Stop leaking a signature every time we fail to parse a consensus or
  30172. a vote. Bugfix on 0.2.0.3-alpha.
  30173. - Stop leaking v2_download_status_map on shutdown. Bugfix on
  30174. 0.2.0.9-alpha.
  30175. - Stop leaking conn->nickname every time we make a connection to a
  30176. Tor relay without knowing its expected identity digest (e.g. when
  30177. using bridges). Bugfix on 0.2.0.3-alpha.
  30178. - Minor bugfixes (portability):
  30179. - Run correctly on platforms where rlim_t is larger than unsigned
  30180. long, and/or where the real limit for number of open files is
  30181. OPEN_FILES, not rlim_max from getrlimit(RLIMIT_NOFILES). In
  30182. particular, these may be needed for OS X 10.5.
  30183. Changes in version 0.1.2.18 - 2007-10-28
  30184. Tor 0.1.2.18 fixes many problems including crash bugs, problems with
  30185. hidden service introduction that were causing huge delays, and a big
  30186. bug that was causing some servers to disappear from the network status
  30187. lists for a few hours each day.
  30188. o Major bugfixes (crashes):
  30189. - If a connection is shut down abruptly because of something that
  30190. happened inside connection_flushed_some(), do not call
  30191. connection_finished_flushing(). Should fix bug 451:
  30192. "connection_stop_writing: Assertion conn->write_event failed"
  30193. Bugfix on 0.1.2.7-alpha.
  30194. - Fix possible segfaults in functions called from
  30195. rend_process_relay_cell().
  30196. o Major bugfixes (hidden services):
  30197. - Hidden services were choosing introduction points uniquely by
  30198. hexdigest, but when constructing the hidden service descriptor
  30199. they merely wrote the (potentially ambiguous) nickname.
  30200. - Clients now use the v2 intro format for hidden service
  30201. connections: they specify their chosen rendezvous point by identity
  30202. digest rather than by (potentially ambiguous) nickname. These
  30203. changes could speed up hidden service connections dramatically.
  30204. o Major bugfixes (other):
  30205. - Stop publishing a new server descriptor just because we get a
  30206. HUP signal. This led (in a roundabout way) to some servers getting
  30207. dropped from the networkstatus lists for a few hours each day.
  30208. - When looking for a circuit to cannibalize, consider family as well
  30209. as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
  30210. circuit cannibalization).
  30211. - When a router wasn't listed in a new networkstatus, we were leaving
  30212. the flags for that router alone -- meaning it remained Named,
  30213. Running, etc -- even though absence from the networkstatus means
  30214. that it shouldn't be considered to exist at all anymore. Now we
  30215. clear all the flags for routers that fall out of the networkstatus
  30216. consensus. Fixes bug 529.
  30217. o Minor bugfixes:
  30218. - Don't try to access (or alter) the state file when running
  30219. --list-fingerprint or --verify-config or --hash-password. Resolves
  30220. bug 499.
  30221. - When generating information telling us how to extend to a given
  30222. router, do not try to include the nickname if it is
  30223. absent. Resolves bug 467.
  30224. - Fix a user-triggerable segfault in expand_filename(). (There isn't
  30225. a way to trigger this remotely.)
  30226. - When sending a status event to the controller telling it that an
  30227. OR address is reachable, set the port correctly. (Previously we
  30228. were reporting the dir port.)
  30229. - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
  30230. command. Bugfix on 0.1.2.17.
  30231. - When loading bandwidth history, do not believe any information in
  30232. the future. Fixes bug 434.
  30233. - When loading entry guard information, do not believe any information
  30234. in the future.
  30235. - When we have our clock set far in the future and generate an
  30236. onion key, then re-set our clock to be correct, we should not stop
  30237. the onion key from getting rotated.
  30238. - On some platforms, accept() can return a broken address. Detect
  30239. this more quietly, and deal accordingly. Fixes bug 483.
  30240. - It's not actually an error to find a non-pending entry in the DNS
  30241. cache when canceling a pending resolve. Don't log unless stuff
  30242. is fishy. Resolves bug 463.
  30243. - Don't reset trusted dir server list when we set a configuration
  30244. option. Patch from Robert Hogan.
  30245. - Don't try to create the datadir when running --verify-config or
  30246. --hash-password. Resolves bug 540.
  30247. Changes in version 0.2.0.9-alpha - 2007-10-24
  30248. This ninth development snapshot switches clients to the new v3 directory
  30249. system; allows servers to be listed in the network status even when they
  30250. have the same nickname as a registered server; and fixes many other
  30251. bugs including a big one that was causing some servers to disappear
  30252. from the network status lists for a few hours each day.
  30253. o Major features (directory system):
  30254. - Clients now download v3 consensus networkstatus documents instead
  30255. of v2 networkstatus documents. Clients and caches now base their
  30256. opinions about routers on these consensus documents. Clients only
  30257. download router descriptors listed in the consensus.
  30258. - Authorities now list servers who have the same nickname as
  30259. a different named server, but list them with a new flag,
  30260. "Unnamed". Now we can list servers that happen to pick the same
  30261. nickname as a server that registered two years ago and then
  30262. disappeared. Partially implements proposal 122.
  30263. - If the consensus lists a router as "Unnamed", the name is assigned
  30264. to a different router: do not identify the router by that name.
  30265. Partially implements proposal 122.
  30266. - Authorities can now come to a consensus on which method to use to
  30267. compute the consensus. This gives us forward compatibility.
  30268. o Major bugfixes:
  30269. - Stop publishing a new server descriptor just because we HUP or
  30270. when we find our DirPort to be reachable but won't actually publish
  30271. it. New descriptors without any real changes are dropped by the
  30272. authorities, and can screw up our "publish every 18 hours" schedule.
  30273. Bugfix on 0.1.2.x.
  30274. - When a router wasn't listed in a new networkstatus, we were leaving
  30275. the flags for that router alone -- meaning it remained Named,
  30276. Running, etc -- even though absence from the networkstatus means
  30277. that it shouldn't be considered to exist at all anymore. Now we
  30278. clear all the flags for routers that fall out of the networkstatus
  30279. consensus. Fixes bug 529; bugfix on 0.1.2.x.
  30280. - Fix awful behavior in DownloadExtraInfo option where we'd fetch
  30281. extrainfo documents and then discard them immediately for not
  30282. matching the latest router. Bugfix on 0.2.0.1-alpha.
  30283. o Minor features (v3 directory protocol):
  30284. - Allow tor-gencert to generate a new certificate without replacing
  30285. the signing key.
  30286. - Allow certificates to include an address.
  30287. - When we change our directory-cache settings, reschedule all voting
  30288. and download operations.
  30289. - Reattempt certificate downloads immediately on failure, as long as
  30290. we haven't failed a threshold number of times yet.
  30291. - Delay retrying consensus downloads while we're downloading
  30292. certificates to verify the one we just got. Also, count getting a
  30293. consensus that we already have (or one that isn't valid) as a failure,
  30294. and count failing to get the certificates after 20 minutes as a
  30295. failure.
  30296. - Build circuits and download descriptors even if our consensus is a
  30297. little expired. (This feature will go away once authorities are
  30298. more reliable.)
  30299. o Minor features (router descriptor cache):
  30300. - If we find a cached-routers file that's been sitting around for more
  30301. than 28 days unmodified, then most likely it's a leftover from
  30302. when we upgraded to 0.2.0.8-alpha. Remove it. It has no good
  30303. routers anyway.
  30304. - When we (as a cache) download a descriptor because it was listed
  30305. in a consensus, remember when the consensus was supposed to expire,
  30306. and don't expire the descriptor until then.
  30307. o Minor features (performance):
  30308. - Call routerlist_remove_old_routers() much less often. This should
  30309. speed startup, especially on directory caches.
  30310. - Don't try to launch new descriptor downloads quite so often when we
  30311. already have enough directory information to build circuits.
  30312. - Base64 decoding was actually showing up on our profile when parsing
  30313. the initial descriptor file; switch to an in-process all-at-once
  30314. implementation that's about 3.5x times faster than calling out to
  30315. OpenSSL.
  30316. o Minor features (compilation):
  30317. - Detect non-ASCII platforms (if any still exist) and refuse to
  30318. build there: some of our code assumes that 'A' is 65 and so on.
  30319. o Minor bugfixes (v3 directory authorities, bugfixes on 0.2.0.x):
  30320. - Make the "next period" votes into "current period" votes immediately
  30321. after publishing the consensus; avoid a heisenbug that made them
  30322. stick around indefinitely.
  30323. - When we discard a vote as a duplicate, do not report this as
  30324. an error.
  30325. - Treat missing v3 keys or certificates as an error when running as a
  30326. v3 directory authority.
  30327. - When we're configured to be a v3 authority, but we're only listed
  30328. as a non-v3 authority in our DirServer line for ourself, correct
  30329. the listing.
  30330. - If an authority doesn't have a qualified hostname, just put
  30331. its address in the vote. This fixes the problem where we referred to
  30332. "moria on moria:9031."
  30333. - Distinguish between detached signatures for the wrong period, and
  30334. detached signatures for a divergent vote.
  30335. - Fix a small memory leak when computing a consensus.
  30336. - When there's no consensus, we were forming a vote every 30
  30337. minutes, but writing the "valid-after" line in our vote based
  30338. on our configured V3AuthVotingInterval: so unless the intervals
  30339. matched up, we immediately rejected our own vote because it didn't
  30340. start at the voting interval that caused us to construct a vote.
  30341. o Minor bugfixes (v3 directory protocol, bugfixes on 0.2.0.x):
  30342. - Delete unverified-consensus when the real consensus is set.
  30343. - Consider retrying a consensus networkstatus fetch immediately
  30344. after one fails: don't wait 60 seconds to notice.
  30345. - When fetching a consensus as a cache, wait until a newer consensus
  30346. should exist before trying to replace the current one.
  30347. - Use a more forgiving schedule for retrying failed consensus
  30348. downloads than for other types.
  30349. o Minor bugfixes (other directory issues):
  30350. - Correct the implementation of "download votes by digest." Bugfix on
  30351. 0.2.0.8-alpha.
  30352. - Authorities no longer send back "400 you're unreachable please fix
  30353. it" errors to Tor servers that aren't online all the time. We're
  30354. supposed to tolerate these servers now. Bugfix on 0.1.2.x.
  30355. o Minor bugfixes (controller):
  30356. - Don't reset trusted dir server list when we set a configuration
  30357. option. Patch from Robert Hogan; bugfix on 0.1.2.x.
  30358. - Respond to INT and TERM SIGNAL commands before we execute the
  30359. signal, in case the signal shuts us down. We had a patch in
  30360. 0.1.2.1-alpha that tried to do this by queueing the response on
  30361. the connection's buffer before shutting down, but that really
  30362. isn't the same thing at all. Bug located by Matt Edman.
  30363. o Minor bugfixes (misc):
  30364. - Correctly check for bad options to the "PublishServerDescriptor"
  30365. config option. Bugfix on 0.2.0.1-alpha; reported by Matt Edman.
  30366. - Stop leaking memory on failing case of base32_decode, and make
  30367. it accept upper-case letters. Bugfixes on 0.2.0.7-alpha.
  30368. - Don't try to download extrainfo documents when we're trying to
  30369. fetch enough directory info to build a circuit: having enough
  30370. info should get priority. Bugfix on 0.2.0.x.
  30371. - Don't complain that "your server has not managed to confirm that its
  30372. ports are reachable" if we haven't been able to build any circuits
  30373. yet. Bug found by spending four hours without a v3 consensus. Bugfix
  30374. on 0.1.2.x.
  30375. - Detect the reason for failing to mmap a descriptor file we just
  30376. wrote, and give a more useful log message. Fixes bug 533. Bugfix
  30377. on 0.1.2.x.
  30378. o Code simplifications and refactoring:
  30379. - Remove support for the old bw_accounting file: we've been storing
  30380. bandwidth accounting information in the state file since
  30381. 0.1.2.5-alpha. This may result in bandwidth accounting errors
  30382. if you try to upgrade from 0.1.1.x or earlier, or if you try to
  30383. downgrade to 0.1.1.x or earlier.
  30384. - New convenience code to locate a file within the DataDirectory.
  30385. - Move non-authority functionality out of dirvote.c.
  30386. - Refactor the arguments for router_pick_{directory_|trusteddir}server
  30387. so that they all take the same named flags.
  30388. o Utilities
  30389. - Include the "tor-ctrl.sh" bash script by Stefan Behte to provide
  30390. Unix users an easy way to script their Tor process (e.g. by
  30391. adjusting bandwidth based on the time of the day).
  30392. Changes in version 0.2.0.8-alpha - 2007-10-12
  30393. This eighth development snapshot fixes a crash bug that's been bothering
  30394. us since February 2007, lets bridge authorities store a list of bridge
  30395. descriptors they've seen, gets v3 directory voting closer to working,
  30396. starts caching v3 directory consensus documents on directory mirrors,
  30397. and fixes a variety of smaller issues including some minor memory leaks.
  30398. o Major features (router descriptor cache):
  30399. - Store routers in a file called cached-descriptors instead of in
  30400. cached-routers. Initialize cached-descriptors from cached-routers
  30401. if the old format is around. The new format allows us to store
  30402. annotations along with descriptors.
  30403. - Use annotations to record the time we received each descriptor, its
  30404. source, and its purpose.
  30405. - Disable the SETROUTERPURPOSE controller command: it is now
  30406. obsolete.
  30407. - Controllers should now specify cache=no or cache=yes when using
  30408. the +POSTDESCRIPTOR command.
  30409. - Bridge authorities now write bridge descriptors to disk, meaning
  30410. we can export them to other programs and begin distributing them
  30411. to blocked users.
  30412. o Major features (directory authorities):
  30413. - When a v3 authority is missing votes or signatures, it now tries
  30414. to fetch them.
  30415. - Directory authorities track weighted fractional uptime as well as
  30416. weighted mean-time-between failures. WFU is suitable for deciding
  30417. whether a node is "usually up", while MTBF is suitable for deciding
  30418. whether a node is "likely to stay up." We need both, because
  30419. "usually up" is a good requirement for guards, while "likely to
  30420. stay up" is a good requirement for long-lived connections.
  30421. o Major features (v3 directory system):
  30422. - Caches now download v3 network status documents as needed,
  30423. and download the descriptors listed in them.
  30424. - All hosts now attempt to download and keep fresh v3 authority
  30425. certificates, and re-attempt after failures.
  30426. - More internal-consistency checks for vote parsing.
  30427. o Major bugfixes (crashes):
  30428. - If a connection is shut down abruptly because of something that
  30429. happened inside connection_flushed_some(), do not call
  30430. connection_finished_flushing(). Should fix bug 451. Bugfix on
  30431. 0.1.2.7-alpha.
  30432. o Major bugfixes (performance):
  30433. - Fix really bad O(n^2) performance when parsing a long list of
  30434. routers: Instead of searching the entire list for an "extra-info "
  30435. string which usually wasn't there, once for every routerinfo
  30436. we read, just scan lines forward until we find one we like.
  30437. Bugfix on 0.2.0.1.
  30438. - When we add data to a write buffer in response to the data on that
  30439. write buffer getting low because of a flush, do not consider the
  30440. newly added data as a candidate for immediate flushing, but rather
  30441. make it wait until the next round of writing. Otherwise, we flush
  30442. and refill recursively, and a single greedy TLS connection can
  30443. eat all of our bandwidth. Bugfix on 0.1.2.7-alpha.
  30444. o Minor features (v3 authority system):
  30445. - Add more ways for tools to download the votes that lead to the
  30446. current consensus.
  30447. - Send a 503 when low on bandwidth and a vote, consensus, or
  30448. certificate is requested.
  30449. - If-modified-since is now implemented properly for all kinds of
  30450. certificate requests.
  30451. o Minor bugfixes (network statuses):
  30452. - Tweak the implementation of proposal 109 slightly: allow at most
  30453. two Tor servers on the same IP address, except if it's the location
  30454. of a directory authority, in which case allow five. Bugfix on
  30455. 0.2.0.3-alpha.
  30456. o Minor bugfixes (controller):
  30457. - When sending a status event to the controller telling it that an
  30458. OR address is reachable, set the port correctly. (Previously we
  30459. were reporting the dir port.) Bugfix on 0.1.2.x.
  30460. o Minor bugfixes (v3 directory system):
  30461. - Fix logic to look up a cert by its signing key digest. Bugfix on
  30462. 0.2.0.7-alpha.
  30463. - Only change the reply to a vote to "OK" if it's not already
  30464. set. This gets rid of annoying "400 OK" log messages, which may
  30465. have been masking some deeper issue. Bugfix on 0.2.0.7-alpha.
  30466. - When we get a valid consensus, recompute the voting schedule.
  30467. - Base the valid-after time of a vote on the consensus voting
  30468. schedule, not on our preferred schedule.
  30469. - Make the return values and messages from signature uploads and
  30470. downloads more sensible.
  30471. - Fix a memory leak when serving votes and consensus documents, and
  30472. another when serving certificates.
  30473. o Minor bugfixes (performance):
  30474. - Use a slightly simpler string hashing algorithm (copying Python's
  30475. instead of Java's) and optimize our digest hashing algorithm to take
  30476. advantage of 64-bit platforms and to remove some possibly-costly
  30477. voodoo.
  30478. - Fix a minor memory leak whenever we parse guards from our state
  30479. file. Bugfix on 0.2.0.7-alpha.
  30480. - Fix a minor memory leak whenever we write out a file. Bugfix on
  30481. 0.2.0.7-alpha.
  30482. - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
  30483. command. Bugfix on 0.2.0.5-alpha.
  30484. o Minor bugfixes (portability):
  30485. - On some platforms, accept() can return a broken address. Detect
  30486. this more quietly, and deal accordingly. Fixes bug 483.
  30487. - Stop calling tor_strlower() on uninitialized memory in some cases.
  30488. Bugfix in 0.2.0.7-alpha.
  30489. o Minor bugfixes (usability):
  30490. - Treat some 403 responses from directory servers as INFO rather than
  30491. WARN-severity events.
  30492. - It's not actually an error to find a non-pending entry in the DNS
  30493. cache when canceling a pending resolve. Don't log unless stuff is
  30494. fishy. Resolves bug 463.
  30495. o Minor bugfixes (anonymity):
  30496. - Never report that we've used more bandwidth than we're willing to
  30497. relay: it leaks how much non-relay traffic we're using. Resolves
  30498. bug 516.
  30499. - When looking for a circuit to cannibalize, consider family as well
  30500. as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
  30501. circuit cannibalization).
  30502. o Code simplifications and refactoring:
  30503. - Make a bunch of functions static. Remove some dead code.
  30504. - Pull out about a third of the really big routerlist.c; put it in a
  30505. new module, networkstatus.c.
  30506. - Merge the extra fields in local_routerstatus_t back into
  30507. routerstatus_t: we used to need one routerstatus_t for each
  30508. authority's opinion, plus a local_routerstatus_t for the locally
  30509. computed consensus opinion. To save space, we put the locally
  30510. modified fields into local_routerstatus_t, and only the common
  30511. stuff into routerstatus_t. But once v3 directories are in use,
  30512. clients and caches will no longer need to hold authority opinions;
  30513. thus, the rationale for keeping the types separate is now gone.
  30514. - Make the code used to reschedule and reattempt downloads more
  30515. uniform.
  30516. - Turn all 'Are we a directory server/mirror?' logic into a call to
  30517. dirserver_mode().
  30518. - Remove the code to generate the oldest (v1) directory format.
  30519. The code has been disabled since 0.2.0.5-alpha.
  30520. Changes in version 0.2.0.7-alpha - 2007-09-21
  30521. This seventh development snapshot makes bridges work again, makes bridge
  30522. authorities work for the first time, fixes two huge performance flaws
  30523. in hidden services, and fixes a variety of minor issues.
  30524. o New directory authorities:
  30525. - Set up moria1 and tor26 as the first v3 directory authorities. See
  30526. doc/spec/dir-spec.txt for details on the new directory design.
  30527. o Major bugfixes (crashes):
  30528. - Fix possible segfaults in functions called from
  30529. rend_process_relay_cell(). Bugfix on 0.1.2.x.
  30530. o Major bugfixes (bridges):
  30531. - Fix a bug that made servers send a "404 Not found" in response to
  30532. attempts to fetch their server descriptor. This caused Tor servers
  30533. to take many minutes to establish reachability for their DirPort,
  30534. and it totally crippled bridges. Bugfix on 0.2.0.5-alpha.
  30535. - Make "UpdateBridgesFromAuthority" torrc option work: when bridge
  30536. users configure that and specify a bridge with an identity
  30537. fingerprint, now they will lookup the bridge descriptor at the
  30538. default bridge authority via a one-hop tunnel, but once circuits
  30539. are established they will switch to a three-hop tunnel for later
  30540. connections to the bridge authority. Bugfix in 0.2.0.3-alpha.
  30541. o Major bugfixes (hidden services):
  30542. - Hidden services were choosing introduction points uniquely by
  30543. hexdigest, but when constructing the hidden service descriptor
  30544. they merely wrote the (potentially ambiguous) nickname.
  30545. - Clients now use the v2 intro format for hidden service
  30546. connections: they specify their chosen rendezvous point by identity
  30547. digest rather than by (potentially ambiguous) nickname. Both
  30548. are bugfixes on 0.1.2.x, and they could speed up hidden service
  30549. connections dramatically. Thanks to Karsten Loesing.
  30550. o Minor features (security):
  30551. - As a client, do not believe any server that tells us that an
  30552. address maps to an internal address space.
  30553. - Make it possible to enable HashedControlPassword and
  30554. CookieAuthentication at the same time.
  30555. o Minor features (guard nodes):
  30556. - Tag every guard node in our state file with the version that
  30557. we believe added it, or with our own version if we add it. This way,
  30558. if a user temporarily runs an old version of Tor and then switches
  30559. back to a new one, she doesn't automatically lose her guards.
  30560. o Minor features (speed):
  30561. - When implementing AES counter mode, update only the portions of the
  30562. counter buffer that need to change, and don't keep separate
  30563. network-order and host-order counters when they are the same (i.e.,
  30564. on big-endian hosts.)
  30565. o Minor features (controller):
  30566. - Accept LF instead of CRLF on controller, since some software has a
  30567. hard time generating real Internet newlines.
  30568. - Add GETINFO values for the server status events
  30569. "REACHABILITY_SUCCEEDED" and "GOOD_SERVER_DESCRIPTOR". Patch from
  30570. Robert Hogan.
  30571. o Removed features:
  30572. - Routers no longer include bandwidth-history lines in their
  30573. descriptors; this information is already available in extra-info
  30574. documents, and including it in router descriptors took up 60%
  30575. (!) of compressed router descriptor downloads. Completes
  30576. implementation of proposal 104.
  30577. - Remove the contrib scripts ExerciseServer.py, PathDemo.py,
  30578. and TorControl.py, as they use the old v0 controller protocol,
  30579. and are obsoleted by TorFlow anyway.
  30580. - Drop support for v1 rendezvous descriptors, since we never used
  30581. them anyway, and the code has probably rotted by now. Based on
  30582. patch from Karsten Loesing.
  30583. - On OSX, stop warning the user that kqueue support in libevent is
  30584. "experimental", since it seems to have worked fine for ages.
  30585. o Minor bugfixes:
  30586. - When generating information telling us how to extend to a given
  30587. router, do not try to include the nickname if it is absent. Fixes
  30588. bug 467. Bugfix on 0.2.0.3-alpha.
  30589. - Fix a user-triggerable (but not remotely-triggerable) segfault
  30590. in expand_filename(). Bugfix on 0.1.2.x.
  30591. - Fix a memory leak when freeing incomplete requests from DNSPort.
  30592. Found by Niels Provos with valgrind. Bugfix on 0.2.0.1-alpha.
  30593. - Don't try to access (or alter) the state file when running
  30594. --list-fingerprint or --verify-config or --hash-password. (Resolves
  30595. bug 499.) Bugfix on 0.1.2.x.
  30596. - Servers used to decline to publish their DirPort if their
  30597. BandwidthRate, RelayBandwidthRate, or MaxAdvertisedBandwidth
  30598. were below a threshold. Now they only look at BandwidthRate and
  30599. RelayBandwidthRate. Bugfix on 0.1.2.x.
  30600. - Remove an optimization in the AES counter-mode code that assumed
  30601. that the counter never exceeded 2^68. When the counter can be set
  30602. arbitrarily as an IV (as it is by Karsten's new hidden services
  30603. code), this assumption no longer holds. Bugfix on 0.1.2.x.
  30604. - Resume listing "AUTHORITY" flag for authorities in network status.
  30605. Bugfix on 0.2.0.3-alpha; reported by Alex de Joode.
  30606. o Code simplifications and refactoring:
  30607. - Revamp file-writing logic so we don't need to have the entire
  30608. contents of a file in memory at once before we write to disk. Tor,
  30609. meet stdio.
  30610. - Turn "descriptor store" into a full-fledged type.
  30611. - Move all NT services code into a separate source file.
  30612. - Unify all code that computes medians, percentile elements, etc.
  30613. - Get rid of a needless malloc when parsing address policies.
  30614. Changes in version 0.1.2.17 - 2007-08-30
  30615. Tor 0.1.2.17 features a new Vidalia version in the Windows and OS
  30616. X bundles. Vidalia 0.0.14 makes authentication required for the
  30617. ControlPort in the default configuration, which addresses important
  30618. security risks. Everybody who uses Vidalia (or another controller)
  30619. should upgrade.
  30620. In addition, this Tor update fixes major load balancing problems with
  30621. path selection, which should speed things up a lot once many people
  30622. have upgraded.
  30623. o Major bugfixes (security):
  30624. - We removed support for the old (v0) control protocol. It has been
  30625. deprecated since Tor 0.1.1.1-alpha, and keeping it secure has
  30626. become more of a headache than it's worth.
  30627. o Major bugfixes (load balancing):
  30628. - When choosing nodes for non-guard positions, weight guards
  30629. proportionally less, since they already have enough load. Patch
  30630. from Mike Perry.
  30631. - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
  30632. will allow fast Tor servers to get more attention.
  30633. - When we're upgrading from an old Tor version, forget our current
  30634. guards and pick new ones according to the new weightings. These
  30635. three load balancing patches could raise effective network capacity
  30636. by a factor of four. Thanks to Mike Perry for measurements.
  30637. o Major bugfixes (stream expiration):
  30638. - Expire not-yet-successful application streams in all cases if
  30639. they've been around longer than SocksTimeout. Right now there are
  30640. some cases where the stream will live forever, demanding a new
  30641. circuit every 15 seconds. Fixes bug 454; reported by lodger.
  30642. o Minor features (controller):
  30643. - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
  30644. is valid before any authentication has been received. It tells
  30645. a controller what kind of authentication is expected, and what
  30646. protocol is spoken. Implements proposal 119.
  30647. o Minor bugfixes (performance):
  30648. - Save on most routerlist_assert_ok() calls in routerlist.c, thus
  30649. greatly speeding up loading cached-routers from disk on startup.
  30650. - Disable sentinel-based debugging for buffer code: we squashed all
  30651. the bugs that this was supposed to detect a long time ago, and now
  30652. its only effect is to change our buffer sizes from nice powers of
  30653. two (which platform mallocs tend to like) to values slightly over
  30654. powers of two (which make some platform mallocs sad).
  30655. o Minor bugfixes (misc):
  30656. - If exit bandwidth ever exceeds one third of total bandwidth, then
  30657. use the correct formula to weight exit nodes when choosing paths.
  30658. Based on patch from Mike Perry.
  30659. - Choose perfectly fairly among routers when choosing by bandwidth and
  30660. weighting by fraction of bandwidth provided by exits. Previously, we
  30661. would choose with only approximate fairness, and correct ourselves
  30662. if we ran off the end of the list.
  30663. - If we require CookieAuthentication but we fail to write the
  30664. cookie file, we would warn but not exit, and end up in a state
  30665. where no controller could authenticate. Now we exit.
  30666. - If we require CookieAuthentication, stop generating a new cookie
  30667. every time we change any piece of our config.
  30668. - Refuse to start with certain directory authority keys, and
  30669. encourage people using them to stop.
  30670. - Terminate multi-line control events properly. Original patch
  30671. from tup.
  30672. - Fix a minor memory leak when we fail to find enough suitable
  30673. servers to choose a circuit.
  30674. - Stop leaking part of the descriptor when we run into a particularly
  30675. unparseable piece of it.
  30676. Changes in version 0.2.0.6-alpha - 2007-08-26
  30677. This sixth development snapshot features a new Vidalia version in the
  30678. Windows and OS X bundles. Vidalia 0.0.14 makes authentication required for
  30679. the ControlPort in the default configuration, which addresses important
  30680. security risks.
  30681. In addition, this snapshot fixes major load balancing problems
  30682. with path selection, which should speed things up a lot once many
  30683. people have upgraded. The directory authorities also use a new
  30684. mean-time-between-failure approach to tracking which servers are stable,
  30685. rather than just looking at the most recent uptime.
  30686. o New directory authorities:
  30687. - Set up Tonga as the default bridge directory authority.
  30688. o Major features:
  30689. - Directory authorities now track servers by weighted
  30690. mean-times-between-failures. When we have 4 or more days of data,
  30691. use measured MTBF rather than declared uptime to decide whether
  30692. to call a router Stable. Implements proposal 108.
  30693. o Major bugfixes (load balancing):
  30694. - When choosing nodes for non-guard positions, weight guards
  30695. proportionally less, since they already have enough load. Patch
  30696. from Mike Perry.
  30697. - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
  30698. will allow fast Tor servers to get more attention.
  30699. - When we're upgrading from an old Tor version, forget our current
  30700. guards and pick new ones according to the new weightings. These
  30701. three load balancing patches could raise effective network capacity
  30702. by a factor of four. Thanks to Mike Perry for measurements.
  30703. o Major bugfixes (descriptor parsing):
  30704. - Handle unexpected whitespace better in malformed descriptors. Bug
  30705. found using Benedikt Boss's new Tor fuzzer! Bugfix on 0.2.0.x.
  30706. o Minor features:
  30707. - There is now an ugly, temporary "desc/all-recent-extrainfo-hack"
  30708. GETINFO for Torstat to use until it can switch to using extrainfos.
  30709. - Optionally (if built with -DEXPORTMALLINFO) export the output
  30710. of mallinfo via http, as tor/mallinfo.txt. Only accessible
  30711. from localhost.
  30712. o Minor bugfixes:
  30713. - Do not intermix bridge routers with controller-added
  30714. routers. (Bugfix on 0.2.0.x)
  30715. - Do not fail with an assert when accept() returns an unexpected
  30716. address family. Addresses but does not wholly fix bug 483. (Bugfix
  30717. on 0.2.0.x)
  30718. - Let directory authorities startup even when they can't generate
  30719. a descriptor immediately, e.g. because they don't know their
  30720. address.
  30721. - Stop putting the authentication cookie in a file called "0"
  30722. in your working directory if you don't specify anything for the
  30723. new CookieAuthFile option. Reported by Matt Edman.
  30724. - Make it possible to read the PROTOCOLINFO response in a way that
  30725. conforms to our control-spec. Reported by Matt Edman.
  30726. - Fix a minor memory leak when we fail to find enough suitable
  30727. servers to choose a circuit. Bugfix on 0.1.2.x.
  30728. - Stop leaking part of the descriptor when we run into a particularly
  30729. unparseable piece of it. Bugfix on 0.1.2.x.
  30730. - Unmap the extrainfo cache file on exit.
  30731. Changes in version 0.2.0.5-alpha - 2007-08-19
  30732. This fifth development snapshot fixes compilation on Windows again;
  30733. fixes an obnoxious client-side bug that slowed things down and put
  30734. extra load on the network; gets us closer to using the v3 directory
  30735. voting scheme; makes it easier for Tor controllers to use cookie-based
  30736. authentication; and fixes a variety of other bugs.
  30737. o Removed features:
  30738. - Version 1 directories are no longer generated in full. Instead,
  30739. authorities generate and serve "stub" v1 directories that list
  30740. no servers. This will stop Tor versions 0.1.0.x and earlier from
  30741. working, but (for security reasons) nobody should be running those
  30742. versions anyway.
  30743. o Major bugfixes (compilation, 0.2.0.x):
  30744. - Try to fix Win32 compilation again: improve checking for IPv6 types.
  30745. - Try to fix MSVC compilation: build correctly on platforms that do
  30746. not define s6_addr16 or s6_addr32.
  30747. - Fix compile on platforms without getaddrinfo: bug found by Li-Hui
  30748. Zhou.
  30749. o Major bugfixes (stream expiration):
  30750. - Expire not-yet-successful application streams in all cases if
  30751. they've been around longer than SocksTimeout. Right now there are
  30752. some cases where the stream will live forever, demanding a new
  30753. circuit every 15 seconds. Bugfix on 0.1.2.7-alpha; fixes bug 454;
  30754. reported by lodger.
  30755. o Minor features (directory servers):
  30756. - When somebody requests a list of statuses or servers, and we have
  30757. none of those, return a 404 rather than an empty 200.
  30758. o Minor features (directory voting):
  30759. - Store v3 consensus status consensuses on disk, and reload them
  30760. on startup.
  30761. o Minor features (security):
  30762. - Warn about unsafe ControlPort configurations.
  30763. - Refuse to start with certain directory authority keys, and
  30764. encourage people using them to stop.
  30765. o Minor features (controller):
  30766. - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
  30767. is valid before any authentication has been received. It tells
  30768. a controller what kind of authentication is expected, and what
  30769. protocol is spoken. Implements proposal 119.
  30770. - New config option CookieAuthFile to choose a new location for the
  30771. cookie authentication file, and config option
  30772. CookieAuthFileGroupReadable to make it group-readable.
  30773. o Minor features (unit testing):
  30774. - Add command-line arguments to unit-test executable so that we can
  30775. invoke any chosen test from the command line rather than having
  30776. to run the whole test suite at once; and so that we can turn on
  30777. logging for the unit tests.
  30778. o Minor bugfixes (on 0.1.2.x):
  30779. - If we require CookieAuthentication but we fail to write the
  30780. cookie file, we would warn but not exit, and end up in a state
  30781. where no controller could authenticate. Now we exit.
  30782. - If we require CookieAuthentication, stop generating a new cookie
  30783. every time we change any piece of our config.
  30784. - When loading bandwidth history, do not believe any information in
  30785. the future. Fixes bug 434.
  30786. - When loading entry guard information, do not believe any information
  30787. in the future.
  30788. - When we have our clock set far in the future and generate an
  30789. onion key, then re-set our clock to be correct, we should not stop
  30790. the onion key from getting rotated.
  30791. - Clean up torrc sample config file.
  30792. - Do not automatically run configure from autogen.sh. This
  30793. non-standard behavior tended to annoy people who have built other
  30794. programs.
  30795. o Minor bugfixes (on 0.2.0.x):
  30796. - Fix a bug with AutomapHostsOnResolve that would always cause
  30797. the second request to fail. Bug reported by Kate. Bugfix on
  30798. 0.2.0.3-alpha.
  30799. - Fix a bug in ADDRMAP controller replies that would sometimes
  30800. try to print a NULL. Patch from tup.
  30801. - Read v3 directory authority keys from the right location.
  30802. - Numerous bugfixes to directory voting code.
  30803. Changes in version 0.1.2.16 - 2007-08-01
  30804. Tor 0.1.2.16 fixes a critical security vulnerability that allows a
  30805. remote attacker in certain situations to rewrite the user's torrc
  30806. configuration file. This can completely compromise anonymity of users
  30807. in most configurations, including those running the Vidalia bundles,
  30808. TorK, etc. Or worse.
  30809. o Major security fixes:
  30810. - Close immediately after missing authentication on control port;
  30811. do not allow multiple authentication attempts.
  30812. Changes in version 0.2.0.4-alpha - 2007-08-01
  30813. This fourth development snapshot fixes a critical security vulnerability
  30814. for most users, specifically those running Vidalia, TorK, etc. Everybody
  30815. should upgrade to either 0.1.2.16 or 0.2.0.4-alpha.
  30816. o Major security fixes:
  30817. - Close immediately after missing authentication on control port;
  30818. do not allow multiple authentication attempts.
  30819. o Major bugfixes (compilation):
  30820. - Fix win32 compilation: apparently IN_ADDR and IN6_ADDR are already
  30821. defined there.
  30822. o Minor features (performance):
  30823. - Be even more aggressive about releasing RAM from small
  30824. empty buffers. Thanks to our free-list code, this shouldn't be too
  30825. performance-intensive.
  30826. - Disable sentinel-based debugging for buffer code: we squashed all
  30827. the bugs that this was supposed to detect a long time ago, and
  30828. now its only effect is to change our buffer sizes from nice
  30829. powers of two (which platform mallocs tend to like) to values
  30830. slightly over powers of two (which make some platform mallocs sad).
  30831. - Log malloc statistics from mallinfo() on platforms where it
  30832. exists.
  30833. Changes in version 0.2.0.3-alpha - 2007-07-29
  30834. This third development snapshot introduces new experimental
  30835. blocking-resistance features and a preliminary version of the v3
  30836. directory voting design, and includes many other smaller features
  30837. and bugfixes.
  30838. o Major features:
  30839. - The first pieces of our "bridge" design for blocking-resistance
  30840. are implemented. People can run bridge directory authorities;
  30841. people can run bridges; and people can configure their Tor clients
  30842. with a set of bridges to use as the first hop into the Tor network.
  30843. See http://archives.seul.org/or/talk/Jul-2007/msg00249.html for
  30844. details.
  30845. - Create listener connections before we setuid to the configured
  30846. User and Group. Now non-Windows users can choose port values
  30847. under 1024, start Tor as root, and have Tor bind those ports
  30848. before it changes to another UID. (Windows users could already
  30849. pick these ports.)
  30850. - Added a new ConstrainedSockets config option to set SO_SNDBUF and
  30851. SO_RCVBUF on TCP sockets. Hopefully useful for Tor servers running
  30852. on "vserver" accounts. (Patch from coderman.)
  30853. - Be even more aggressive about separating local traffic from relayed
  30854. traffic when RelayBandwidthRate is set. (Refines proposal 111.)
  30855. o Major features (experimental):
  30856. - First cut of code for "v3 dir voting": directory authorities will
  30857. vote on a common network status document rather than each publishing
  30858. their own opinion. This code needs more testing and more corner-case
  30859. handling before it's ready for use.
  30860. o Security fixes:
  30861. - Directory authorities now call routers Fast if their bandwidth is
  30862. at least 100KB/s, and consider their bandwidth adequate to be a
  30863. Guard if it is at least 250KB/s, no matter the medians. This fix
  30864. complements proposal 107. [Bugfix on 0.1.2.x]
  30865. - Directory authorities now never mark more than 3 servers per IP as
  30866. Valid and Running. (Implements proposal 109, by Kevin Bauer and
  30867. Damon McCoy.)
  30868. - Minor change to organizationName and commonName generation
  30869. procedures in TLS certificates during Tor handshakes, to invalidate
  30870. some earlier censorware approaches. This is not a long-term
  30871. solution, but applying it will give us a bit of time to look into
  30872. the epidemiology of countermeasures as they spread.
  30873. o Major bugfixes (directory):
  30874. - Rewrite directory tokenization code to never run off the end of
  30875. a string. Fixes bug 455. Patch from croup. [Bugfix on 0.1.2.x]
  30876. o Minor features (controller):
  30877. - Add a SOURCE_ADDR field to STREAM NEW events so that controllers can
  30878. match requests to applications. (Patch from Robert Hogan.)
  30879. - Report address and port correctly on connections to DNSPort. (Patch
  30880. from Robert Hogan.)
  30881. - Add a RESOLVE command to launch hostname lookups. (Original patch
  30882. from Robert Hogan.)
  30883. - Add GETINFO status/enough-dir-info to let controllers tell whether
  30884. Tor has downloaded sufficient directory information. (Patch
  30885. from Tup.)
  30886. - You can now use the ControlSocket option to tell Tor to listen for
  30887. controller connections on Unix domain sockets on systems that
  30888. support them. (Patch from Peter Palfrader.)
  30889. - STREAM NEW events are generated for DNSPort requests and for
  30890. tunneled directory connections. (Patch from Robert Hogan.)
  30891. - New "GETINFO address-mappings/*" command to get address mappings
  30892. with expiry information. "addr-mappings/*" is now deprecated.
  30893. (Patch from Tup.)
  30894. o Minor features (misc):
  30895. - Merge in some (as-yet-unused) IPv6 address manipulation code. (Patch
  30896. from croup.)
  30897. - The tor-gencert tool for v3 directory authorities now creates all
  30898. files as readable to the file creator only, and write-protects
  30899. the authority identity key.
  30900. - When dumping memory usage, list bytes used in buffer memory
  30901. free-lists.
  30902. - When running with dmalloc, dump more stats on hup and on exit.
  30903. - Directory authorities now fail quickly and (relatively) harmlessly
  30904. if they generate a network status document that is somehow
  30905. malformed.
  30906. o Traffic load balancing improvements:
  30907. - If exit bandwidth ever exceeds one third of total bandwidth, then
  30908. use the correct formula to weight exit nodes when choosing paths.
  30909. (Based on patch from Mike Perry.)
  30910. - Choose perfectly fairly among routers when choosing by bandwidth and
  30911. weighting by fraction of bandwidth provided by exits. Previously, we
  30912. would choose with only approximate fairness, and correct ourselves
  30913. if we ran off the end of the list. [Bugfix on 0.1.2.x]
  30914. o Performance improvements:
  30915. - Be more aggressive with freeing buffer RAM or putting it on the
  30916. memory free lists.
  30917. - Use Critical Sections rather than Mutexes for synchronizing threads
  30918. on win32; Mutexes are heavier-weight, and designed for synchronizing
  30919. between processes.
  30920. o Deprecated and removed features:
  30921. - RedirectExits is now deprecated.
  30922. - Stop allowing address masks that do not correspond to bit prefixes.
  30923. We have warned about these for a really long time; now it's time
  30924. to reject them. (Patch from croup.)
  30925. o Minor bugfixes (directory):
  30926. - Fix another crash bug related to extra-info caching. (Bug found by
  30927. Peter Palfrader.) [Bugfix on 0.2.0.2-alpha]
  30928. - Directories no longer return a "304 not modified" when they don't
  30929. have the networkstatus the client asked for. Also fix a memory
  30930. leak when returning 304 not modified. [Bugfixes on 0.2.0.2-alpha]
  30931. - We had accidentally labelled 0.1.2.x directory servers as not
  30932. suitable for begin_dir requests, and had labelled no directory
  30933. servers as suitable for uploading extra-info documents. [Bugfix
  30934. on 0.2.0.1-alpha]
  30935. o Minor bugfixes (dns):
  30936. - Fix a crash when DNSPort is set more than once. (Patch from Robert
  30937. Hogan.) [Bugfix on 0.2.0.2-alpha]
  30938. - Add DNSPort connections to the global connection list, so that we
  30939. can time them out correctly. (Bug found by Robert Hogan.) [Bugfix
  30940. on 0.2.0.2-alpha]
  30941. - Fix a dangling reference that could lead to a crash when DNSPort is
  30942. changed or closed (Patch from Robert Hogan.) [Bugfix on
  30943. 0.2.0.2-alpha]
  30944. o Minor bugfixes (controller):
  30945. - Provide DNS expiry times in GMT, not in local time. For backward
  30946. compatibility, ADDRMAP events only provide GMT expiry in an extended
  30947. field. "GETINFO address-mappings" always does the right thing.
  30948. - Use CRLF line endings properly in NS events.
  30949. - Terminate multi-line control events properly. (Original patch
  30950. from tup.) [Bugfix on 0.1.2.x-alpha]
  30951. - Do not include spaces in SOURCE_ADDR fields in STREAM
  30952. events. Resolves bug 472. [Bugfix on 0.2.0.x-alpha]
  30953. Changes in version 0.1.2.15 - 2007-07-17
  30954. Tor 0.1.2.15 fixes several crash bugs, fixes some anonymity-related
  30955. problems, fixes compilation on BSD, and fixes a variety of other
  30956. bugs. Everybody should upgrade.
  30957. o Major bugfixes (compilation):
  30958. - Fix compile on FreeBSD/NetBSD/OpenBSD. Oops.
  30959. o Major bugfixes (crashes):
  30960. - Try even harder not to dereference the first character after
  30961. an mmap(). Reported by lodger.
  30962. - Fix a crash bug in directory authorities when we re-number the
  30963. routerlist while inserting a new router.
  30964. - When the cached-routers file is an even multiple of the page size,
  30965. don't run off the end and crash. (Fixes bug 455; based on idea
  30966. from croup.)
  30967. - Fix eventdns.c behavior on Solaris: It is critical to include
  30968. orconfig.h _before_ sys/types.h, so that we can get the expected
  30969. definition of _FILE_OFFSET_BITS.
  30970. o Major bugfixes (security):
  30971. - Fix a possible buffer overrun when using BSD natd support. Bug
  30972. found by croup.
  30973. - When sending destroy cells from a circuit's origin, don't include
  30974. the reason for tearing down the circuit. The spec says we didn't,
  30975. and now we actually don't. Reported by lodger.
  30976. - Keep streamids from different exits on a circuit separate. This
  30977. bug may have allowed other routers on a given circuit to inject
  30978. cells into streams. Reported by lodger; fixes bug 446.
  30979. - If there's a never-before-connected-to guard node in our list,
  30980. never choose any guards past it. This way we don't expand our
  30981. guard list unless we need to.
  30982. o Minor bugfixes (guard nodes):
  30983. - Weight guard selection by bandwidth, so that low-bandwidth nodes
  30984. don't get overused as guards.
  30985. o Minor bugfixes (directory):
  30986. - Correctly count the number of authorities that recommend each
  30987. version. Previously, we were under-counting by 1.
  30988. - Fix a potential crash bug when we load many server descriptors at
  30989. once and some of them make others of them obsolete. Fixes bug 458.
  30990. o Minor bugfixes (hidden services):
  30991. - Stop tearing down the whole circuit when the user asks for a
  30992. connection to a port that the hidden service didn't configure.
  30993. Resolves bug 444.
  30994. o Minor bugfixes (misc):
  30995. - On Windows, we were preventing other processes from reading
  30996. cached-routers while Tor was running. Reported by janbar.
  30997. - Fix a possible (but very unlikely) bug in picking routers by
  30998. bandwidth. Add a log message to confirm that it is in fact
  30999. unlikely. Patch from lodger.
  31000. - Backport a couple of memory leak fixes.
  31001. - Backport miscellaneous cosmetic bugfixes.
  31002. Changes in version 0.2.0.2-alpha - 2007-06-02
  31003. o Major bugfixes on 0.2.0.1-alpha:
  31004. - Fix an assertion failure related to servers without extra-info digests.
  31005. Resolves bugs 441 and 442.
  31006. o Minor features (directory):
  31007. - Support "If-Modified-Since" when answering HTTP requests for
  31008. directories, running-routers documents, and network-status documents.
  31009. (There's no need to support it for router descriptors, since those
  31010. are downloaded by descriptor digest.)
  31011. o Minor build issues:
  31012. - Clear up some MIPSPro compiler warnings.
  31013. - When building from a tarball on a machine that happens to have SVK
  31014. installed, report the micro-revision as whatever version existed
  31015. in the tarball, not as "x".
  31016. Changes in version 0.2.0.1-alpha - 2007-06-01
  31017. This early development snapshot provides new features for people running
  31018. Tor as both a client and a server (check out the new RelayBandwidth
  31019. config options); lets Tor run as a DNS proxy; and generally moves us
  31020. forward on a lot of fronts.
  31021. o Major features, server usability:
  31022. - New config options RelayBandwidthRate and RelayBandwidthBurst:
  31023. a separate set of token buckets for relayed traffic. Right now
  31024. relayed traffic is defined as answers to directory requests, and
  31025. OR connections that don't have any local circuits on them.
  31026. o Major features, client usability:
  31027. - A client-side DNS proxy feature to replace the need for
  31028. dns-proxy-tor: Just set "DNSPort 9999", and Tor will now listen
  31029. for DNS requests on port 9999, use the Tor network to resolve them
  31030. anonymously, and send the reply back like a regular DNS server.
  31031. The code still only implements a subset of DNS.
  31032. - Make PreferTunneledDirConns and TunnelDirConns work even when
  31033. we have no cached directory info. This means Tor clients can now
  31034. do all of their connections protected by TLS.
  31035. o Major features, performance and efficiency:
  31036. - Directory authorities accept and serve "extra info" documents for
  31037. routers. These documents contain fields from router descriptors
  31038. that aren't usually needed, and that use a lot of excess
  31039. bandwidth. Once these fields are removed from router descriptors,
  31040. the bandwidth savings should be about 60%. [Partially implements
  31041. proposal 104.]
  31042. - Servers upload extra-info documents to any authority that accepts
  31043. them. Authorities (and caches that have been configured to download
  31044. extra-info documents) download them as needed. [Partially implements
  31045. proposal 104.]
  31046. - Change the way that Tor buffers data that it is waiting to write.
  31047. Instead of queueing data cells in an enormous ring buffer for each
  31048. client->OR or OR->OR connection, we now queue cells on a separate
  31049. queue for each circuit. This lets us use less slack memory, and
  31050. will eventually let us be smarter about prioritizing different kinds
  31051. of traffic.
  31052. - Use memory pools to allocate cells with better speed and memory
  31053. efficiency, especially on platforms where malloc() is inefficient.
  31054. - Stop reading on edge connections when their corresponding circuit
  31055. buffers are full; start again as the circuits empty out.
  31056. o Major features, other:
  31057. - Add an HSAuthorityRecordStats option that hidden service authorities
  31058. can use to track statistics of overall hidden service usage without
  31059. logging information that would be very useful to an attacker.
  31060. - Start work implementing multi-level keys for directory authorities:
  31061. Add a standalone tool to generate key certificates. (Proposal 103.)
  31062. o Security fixes:
  31063. - Directory authorities now call routers Stable if they have an
  31064. uptime of at least 30 days, even if that's not the median uptime
  31065. in the network. Implements proposal 107, suggested by Kevin Bauer
  31066. and Damon McCoy.
  31067. o Minor fixes (resource management):
  31068. - Count the number of open sockets separately from the number
  31069. of active connection_t objects. This will let us avoid underusing
  31070. our allocated connection limit.
  31071. - We no longer use socket pairs to link an edge connection to an
  31072. anonymous directory connection or a DirPort test connection.
  31073. Instead, we track the link internally and transfer the data
  31074. in-process. This saves two sockets per "linked" connection (at the
  31075. client and at the server), and avoids the nasty Windows socketpair()
  31076. workaround.
  31077. - Keep unused 4k and 16k buffers on free lists, rather than wasting 8k
  31078. for every single inactive connection_t. Free items from the
  31079. 4k/16k-buffer free lists when they haven't been used for a while.
  31080. o Minor features (build):
  31081. - Make autoconf search for libevent, openssl, and zlib consistently.
  31082. - Update deprecated macros in configure.in.
  31083. - When warning about missing headers, tell the user to let us
  31084. know if the compile succeeds anyway, so we can downgrade the
  31085. warning.
  31086. - Include the current subversion revision as part of the version
  31087. string: either fetch it directly if we're in an SVN checkout, do
  31088. some magic to guess it if we're in an SVK checkout, or use
  31089. the last-detected version if we're building from a .tar.gz.
  31090. Use this version consistently in log messages.
  31091. o Minor features (logging):
  31092. - Always prepend "Bug: " to any log message about a bug.
  31093. - Put a platform string (e.g. "Linux i686") in the startup log
  31094. message, so when people paste just their logs, we know if it's
  31095. OpenBSD or Windows or what.
  31096. - When logging memory usage, break down memory used in buffers by
  31097. buffer type.
  31098. o Minor features (directory system):
  31099. - New config option V2AuthoritativeDirectory that all directory
  31100. authorities should set. This will let future authorities choose
  31101. not to serve V2 directory information.
  31102. - Directory authorities allow multiple router descriptors and/or extra
  31103. info documents to be uploaded in a single go. This will make
  31104. implementing proposal 104 simpler.
  31105. o Minor features (controller):
  31106. - Add a new config option __DisablePredictedCircuits designed for
  31107. use by the controller, when we don't want Tor to build any circuits
  31108. preemptively.
  31109. - Let the controller specify HOP=%d as an argument to ATTACHSTREAM,
  31110. so we can exit from the middle of the circuit.
  31111. - Implement "getinfo status/circuit-established".
  31112. - Implement "getinfo status/version/..." so a controller can tell
  31113. whether the current version is recommended, and whether any versions
  31114. are good, and how many authorities agree. (Patch from shibz.)
  31115. o Minor features (hidden services):
  31116. - Allow multiple HiddenServicePort directives with the same virtual
  31117. port; when they occur, the user is sent round-robin to one
  31118. of the target ports chosen at random. Partially fixes bug 393 by
  31119. adding limited ad-hoc round-robining.
  31120. o Minor features (other):
  31121. - More unit tests.
  31122. - Add a new AutomapHostsOnResolve option: when it is enabled, any
  31123. resolve request for hosts matching a given pattern causes Tor to
  31124. generate an internal virtual address mapping for that host. This
  31125. allows DNSPort to work sensibly with hidden service users. By
  31126. default, .exit and .onion addresses are remapped; the list of
  31127. patterns can be reconfigured with AutomapHostsSuffixes.
  31128. - Add an "-F" option to tor-resolve to force a resolve for a .onion
  31129. address. Thanks to the AutomapHostsOnResolve option, this is no
  31130. longer a completely silly thing to do.
  31131. - If Tor is invoked from something that isn't a shell (e.g. Vidalia),
  31132. now we expand "-f ~/.tor/torrc" correctly. Suggested by Matt Edman.
  31133. - Treat "2gb" when given in torrc for a bandwidth as meaning 2gb,
  31134. minus 1 byte: the actual maximum declared bandwidth.
  31135. o Removed features:
  31136. - Removed support for the old binary "version 0" controller protocol.
  31137. This has been deprecated since 0.1.1, and warnings have been issued
  31138. since 0.1.2. When we encounter a v0 control message, we now send
  31139. back an error and close the connection.
  31140. - Remove the old "dns worker" server DNS code: it hasn't been default
  31141. since 0.1.2.2-alpha, and all the servers seem to be using the new
  31142. eventdns code.
  31143. o Minor bugfixes (portability):
  31144. - Even though Windows is equally happy with / and \ as path separators,
  31145. try to use \ consistently on Windows and / consistently on Unix: it
  31146. makes the log messages nicer.
  31147. - Correctly report platform name on Windows 95 OSR2 and Windows 98 SE.
  31148. - Read resolv.conf files correctly on platforms where read() returns
  31149. partial results on small file reads.
  31150. o Minor bugfixes (directory):
  31151. - Correctly enforce that elements of directory objects do not appear
  31152. more often than they are allowed to appear.
  31153. - When we are reporting the DirServer line we just parsed, we were
  31154. logging the second stanza of the key fingerprint, not the first.
  31155. o Minor bugfixes (logging):
  31156. - When we hit an EOF on a log (probably because we're shutting down),
  31157. don't try to remove the log from the list: just mark it as
  31158. unusable. (Bulletproofs against bug 222.)
  31159. o Minor bugfixes (other):
  31160. - In the exitlist script, only consider the most recently published
  31161. server descriptor for each server. Also, when the user requests
  31162. a list of servers that _reject_ connections to a given address,
  31163. explicitly exclude the IPs that also have servers that accept
  31164. connections to that address. (Resolves bug 405.)
  31165. - Stop allowing hibernating servers to be "stable" or "fast".
  31166. - On Windows, we were preventing other processes from reading
  31167. cached-routers while Tor was running. (Reported by janbar)
  31168. - Make the NodeFamilies config option work. (Reported by
  31169. lodger -- it has never actually worked, even though we added it
  31170. in Oct 2004.)
  31171. - Check return values from pthread_mutex functions.
  31172. - Don't save non-general-purpose router descriptors to the disk cache,
  31173. because we have no way of remembering what their purpose was when
  31174. we restart.
  31175. - Add even more asserts to hunt down bug 417.
  31176. - Build without verbose warnings even on (not-yet-released) gcc 4.2.
  31177. - Fix a possible (but very unlikely) bug in picking routers by bandwidth.
  31178. Add a log message to confirm that it is in fact unlikely.
  31179. o Minor bugfixes (controller):
  31180. - Make 'getinfo fingerprint' return a 551 error if we're not a
  31181. server, so we match what the control spec claims we do. Reported
  31182. by daejees.
  31183. - Fix a typo in an error message when extendcircuit fails that
  31184. caused us to not follow the \r\n-based delimiter protocol. Reported
  31185. by daejees.
  31186. o Code simplifications and refactoring:
  31187. - Stop passing around circuit_t and crypt_path_t pointers that are
  31188. implicit in other procedure arguments.
  31189. - Drop the old code to choke directory connections when the
  31190. corresponding OR connections got full: thanks to the cell queue
  31191. feature, OR conns don't get full any more.
  31192. - Make dns_resolve() handle attaching connections to circuits
  31193. properly, so the caller doesn't have to.
  31194. - Rename wants_to_read and wants_to_write to read/write_blocked_on_bw.
  31195. - Keep the connection array as a dynamic smartlist_t, rather than as
  31196. a fixed-sized array. This is important, as the number of connections
  31197. is becoming increasingly decoupled from the number of sockets.
  31198. Changes in version 0.1.2.14 - 2007-05-25
  31199. Tor 0.1.2.14 changes the addresses of two directory authorities (this
  31200. change especially affects those who serve or use hidden services),
  31201. and fixes several other crash- and security-related bugs.
  31202. o Directory authority changes:
  31203. - Two directory authorities (moria1 and moria2) just moved to new
  31204. IP addresses. This change will particularly affect those who serve
  31205. or use hidden services.
  31206. o Major bugfixes (crashes):
  31207. - If a directory server runs out of space in the connection table
  31208. as it's processing a begin_dir request, it will free the exit stream
  31209. but leave it attached to the circuit, leading to unpredictable
  31210. behavior. (Reported by seeess, fixes bug 425.)
  31211. - Fix a bug in dirserv_remove_invalid() that would cause authorities
  31212. to corrupt memory under some really unlikely scenarios.
  31213. - Tighten router parsing rules. (Bugs reported by Benedikt Boss.)
  31214. - Avoid segfaults when reading from mmaped descriptor file. (Reported
  31215. by lodger.)
  31216. o Major bugfixes (security):
  31217. - When choosing an entry guard for a circuit, avoid using guards
  31218. that are in the same family as the chosen exit -- not just guards
  31219. that are exactly the chosen exit. (Reported by lodger.)
  31220. o Major bugfixes (resource management):
  31221. - If a directory authority is down, skip it when deciding where to get
  31222. networkstatus objects or descriptors. Otherwise we keep asking
  31223. every 10 seconds forever. Fixes bug 384.
  31224. - Count it as a failure if we fetch a valid network-status but we
  31225. don't want to keep it. Otherwise we'll keep fetching it and keep
  31226. not wanting to keep it. Fixes part of bug 422.
  31227. - If all of our dirservers have given us bad or no networkstatuses
  31228. lately, then stop hammering them once per minute even when we
  31229. think they're failed. Fixes another part of bug 422.
  31230. o Minor bugfixes:
  31231. - Actually set the purpose correctly for descriptors inserted with
  31232. purpose=controller.
  31233. - When we have k non-v2 authorities in our DirServer config,
  31234. we ignored the last k authorities in the list when updating our
  31235. network-statuses.
  31236. - Correctly back-off from requesting router descriptors that we are
  31237. having a hard time downloading.
  31238. - Read resolv.conf files correctly on platforms where read() returns
  31239. partial results on small file reads.
  31240. - Don't rebuild the entire router store every time we get 32K of
  31241. routers: rebuild it when the journal gets very large, or when
  31242. the gaps in the store get very large.
  31243. o Minor features:
  31244. - When routers publish SVN revisions in their router descriptors,
  31245. authorities now include those versions correctly in networkstatus
  31246. documents.
  31247. - Warn when using a version of libevent before 1.3b to run a server on
  31248. OSX or BSD: these versions interact badly with userspace threads.
  31249. Changes in version 0.1.2.13 - 2007-04-24
  31250. This release features some major anonymity fixes, such as safer path
  31251. selection; better client performance; faster bootstrapping, better
  31252. address detection, and better DNS support for servers; write limiting as
  31253. well as read limiting to make servers easier to run; and a huge pile of
  31254. other features and bug fixes. The bundles also ship with Vidalia 0.0.11.
  31255. Tor 0.1.2.13 is released in memory of Rob Levin (1955-2006), aka lilo
  31256. of the Freenode IRC network, remembering his patience and vision for
  31257. free speech on the Internet.
  31258. o Minor fixes:
  31259. - Fix a memory leak when we ask for "all" networkstatuses and we
  31260. get one we don't recognize.
  31261. - Add more asserts to hunt down bug 417.
  31262. - Disable kqueue on OS X 10.3 and earlier, to fix bug 371.
  31263. Changes in version 0.1.2.12-rc - 2007-03-16
  31264. o Major bugfixes:
  31265. - Fix an infinite loop introduced in 0.1.2.7-alpha when we serve
  31266. directory information requested inside Tor connections (i.e. via
  31267. begin_dir cells). It only triggered when the same connection was
  31268. serving other data at the same time. Reported by seeess.
  31269. o Minor bugfixes:
  31270. - When creating a circuit via the controller, send a 'launched'
  31271. event when we're done, so we follow the spec better.
  31272. Changes in version 0.1.2.11-rc - 2007-03-15
  31273. o Minor bugfixes (controller), reported by daejees:
  31274. - Correct the control spec to match how the code actually responds
  31275. to 'getinfo addr-mappings/*'.
  31276. - The control spec described a GUARDS event, but the code
  31277. implemented a GUARD event. Standardize on GUARD, but let people
  31278. ask for GUARDS too.
  31279. Changes in version 0.1.2.10-rc - 2007-03-07
  31280. o Major bugfixes (Windows):
  31281. - Do not load the NT services library functions (which may not exist)
  31282. just to detect if we're a service trying to shut down. Now we run
  31283. on Win98 and friends again.
  31284. o Minor bugfixes (other):
  31285. - Clarify a couple of log messages.
  31286. - Fix a misleading socks5 error number.
  31287. Changes in version 0.1.2.9-rc - 2007-03-02
  31288. o Major bugfixes (Windows):
  31289. - On MinGW, use "%I64u" to printf/scanf 64-bit integers, instead
  31290. of the usual GCC "%llu". This prevents a bug when saving 64-bit
  31291. int configuration values: the high-order 32 bits would get
  31292. truncated. In particular, we were being bitten by the default
  31293. MaxAdvertisedBandwidth of 128 TB turning into 0. (Fixes bug 400
  31294. and maybe also bug 397.)
  31295. o Minor bugfixes (performance):
  31296. - Use OpenSSL's AES implementation on platforms where it's faster.
  31297. This could save us as much as 10% CPU usage.
  31298. o Minor bugfixes (server):
  31299. - Do not rotate onion key immediately after setting it for the first
  31300. time.
  31301. o Minor bugfixes (directory authorities):
  31302. - Stop calling servers that have been hibernating for a long time
  31303. "stable". Also, stop letting hibernating or obsolete servers affect
  31304. uptime and bandwidth cutoffs.
  31305. - Stop listing hibernating servers in the v1 directory.
  31306. o Minor bugfixes (hidden services):
  31307. - Upload hidden service descriptors slightly less often, to reduce
  31308. load on authorities.
  31309. o Minor bugfixes (other):
  31310. - Fix an assert that could trigger if a controller quickly set then
  31311. cleared EntryNodes. Bug found by Udo van den Heuvel.
  31312. - On architectures where sizeof(int)>4, still clamp declarable bandwidth
  31313. to INT32_MAX.
  31314. - Fix a potential race condition in the rpm installer. Found by
  31315. Stefan Nordhausen.
  31316. - Try to fix eventdns warnings once and for all: do not treat a dns rcode
  31317. of 2 as indicating that the server is completely bad; it sometimes
  31318. means that the server is just bad for the request in question. (may fix
  31319. the last of bug 326.)
  31320. - Disable encrypted directory connections when we don't have a server
  31321. descriptor for the destination. We'll get this working again in
  31322. the 0.2.0 branch.
  31323. Changes in version 0.1.2.8-beta - 2007-02-26
  31324. o Major bugfixes (crashes):
  31325. - Stop crashing when the controller asks us to resetconf more than
  31326. one config option at once. (Vidalia 0.0.11 does this.)
  31327. - Fix a crash that happened on Win98 when we're given command-line
  31328. arguments: don't try to load NT service functions from advapi32.dll
  31329. except when we need them. (Bug introduced in 0.1.2.7-alpha;
  31330. resolves bug 389.)
  31331. - Fix a longstanding obscure crash bug that could occur when
  31332. we run out of DNS worker processes. (Resolves bug 390.)
  31333. o Major bugfixes (hidden services):
  31334. - Correctly detect whether hidden service descriptor downloads are
  31335. in-progress. (Suggested by Karsten Loesing; fixes bug 399.)
  31336. o Major bugfixes (accounting):
  31337. - When we start during an accounting interval before it's time to wake
  31338. up, remember to wake up at the correct time. (May fix bug 342.)
  31339. o Minor bugfixes (controller):
  31340. - Give the controller END_STREAM_REASON_DESTROY events _before_ we
  31341. clear the corresponding on_circuit variable, and remember later
  31342. that we don't need to send a redundant CLOSED event. Resolves part
  31343. 3 of bug 367.
  31344. - Report events where a resolve succeeded or where we got a socks
  31345. protocol error correctly, rather than calling both of them
  31346. "INTERNAL".
  31347. - Change reported stream target addresses to IP consistently when
  31348. we finally get the IP from an exit node.
  31349. - Send log messages to the controller even if they happen to be very
  31350. long.
  31351. o Minor bugfixes (other):
  31352. - Display correct results when reporting which versions are
  31353. recommended, and how recommended they are. (Resolves bug 383.)
  31354. - Improve our estimates for directory bandwidth to be less random:
  31355. guess that an unrecognized directory will have the average bandwidth
  31356. from all known directories, not that it will have the average
  31357. bandwidth from those directories earlier than it on the list.
  31358. - If we start a server with ClientOnly 1, then set ClientOnly to 0
  31359. and hup, stop triggering an assert based on an empty onion_key.
  31360. - On platforms with no working mmap() equivalent, don't warn the
  31361. user when cached-routers doesn't exist.
  31362. - Warn the user when mmap() [or its equivalent] fails for some reason
  31363. other than file-not-found.
  31364. - Don't warn the user when cached-routers.new doesn't exist: that's
  31365. perfectly fine when starting up for the first time.
  31366. - When EntryNodes are configured, rebuild the guard list to contain,
  31367. in order: the EntryNodes that were guards before; the rest of the
  31368. EntryNodes; the nodes that were guards before.
  31369. - Mask out all signals in sub-threads; only the libevent signal
  31370. handler should be processing them. This should prevent some crashes
  31371. on some machines using pthreads. (Patch from coderman.)
  31372. - Fix switched arguments on memset in the implementation of
  31373. tor_munmap() for systems with no mmap() call.
  31374. - When Tor receives a router descriptor that it asked for, but
  31375. no longer wants (because it has received fresh networkstatuses
  31376. in the meantime), do not warn the user. Cache the descriptor if
  31377. we're a cache; drop it if we aren't.
  31378. - Make earlier entry guards _really_ get retried when the network
  31379. comes back online.
  31380. - On a malformed DNS reply, always give an error to the corresponding
  31381. DNS request.
  31382. - Build with recent libevents on platforms that do not define the
  31383. nonstandard types "u_int8_t" and friends.
  31384. o Minor features (controller):
  31385. - Warn the user when an application uses the obsolete binary v0
  31386. control protocol. We're planning to remove support for it during
  31387. the next development series, so it's good to give people some
  31388. advance warning.
  31389. - Add STREAM_BW events to report per-entry-stream bandwidth
  31390. use. (Patch from Robert Hogan.)
  31391. - Rate-limit SIGNEWNYM signals in response to controllers that
  31392. impolitely generate them for every single stream. (Patch from
  31393. mwenge; closes bug 394.)
  31394. - Make REMAP stream events have a SOURCE (cache or exit), and
  31395. make them generated in every case where we get a successful
  31396. connected or resolved cell.
  31397. o Minor bugfixes (performance):
  31398. - Call router_have_min_dir_info half as often. (This is showing up in
  31399. some profiles, but not others.)
  31400. - When using GCC, make log_debug never get called at all, and its
  31401. arguments never get evaluated, when no debug logs are configured.
  31402. (This is showing up in some profiles, but not others.)
  31403. o Minor features:
  31404. - Remove some never-implemented options. Mark PathlenCoinWeight as
  31405. obsolete.
  31406. - Implement proposal 106: Stop requiring clients to have well-formed
  31407. certificates; stop checking nicknames in certificates. (Clients
  31408. have certificates so that they can look like Tor servers, but in
  31409. the future we might want to allow them to look like regular TLS
  31410. clients instead. Nicknames in certificates serve no purpose other
  31411. than making our protocol easier to recognize on the wire.)
  31412. - Revise messages on handshake failure again to be even more clear about
  31413. which are incoming connections and which are outgoing.
  31414. - Discard any v1 directory info that's over 1 month old (for
  31415. directories) or over 1 week old (for running-routers lists).
  31416. - Do not warn when individual nodes in the configuration's EntryNodes,
  31417. ExitNodes, etc are down: warn only when all possible nodes
  31418. are down. (Fixes bug 348.)
  31419. - Always remove expired routers and networkstatus docs before checking
  31420. whether we have enough information to build circuits. (Fixes
  31421. bug 373.)
  31422. - Put a lower-bound on MaxAdvertisedBandwidth.
  31423. Changes in version 0.1.2.7-alpha - 2007-02-06
  31424. o Major bugfixes (rate limiting):
  31425. - Servers decline directory requests much more aggressively when
  31426. they're low on bandwidth. Otherwise they end up queueing more and
  31427. more directory responses, which can't be good for latency.
  31428. - But never refuse directory requests from local addresses.
  31429. - Fix a memory leak when sending a 503 response for a networkstatus
  31430. request.
  31431. - Be willing to read or write on local connections (e.g. controller
  31432. connections) even when the global rate limiting buckets are empty.
  31433. - If our system clock jumps back in time, don't publish a negative
  31434. uptime in the descriptor. Also, don't let the global rate limiting
  31435. buckets go absurdly negative.
  31436. - Flush local controller connection buffers periodically as we're
  31437. writing to them, so we avoid queueing 4+ megabytes of data before
  31438. trying to flush.
  31439. o Major bugfixes (NT services):
  31440. - Install as NT_AUTHORITY\LocalService rather than as SYSTEM; add a
  31441. command-line flag so that admins can override the default by saying
  31442. "tor --service install --user "SomeUser"". This will not affect
  31443. existing installed services. Also, warn the user that the service
  31444. will look for its configuration file in the service user's
  31445. %appdata% directory. (We can't do the 'hardwire the user's appdata
  31446. directory' trick any more, since we may not have read access to that
  31447. directory.)
  31448. o Major bugfixes (other):
  31449. - Previously, we would cache up to 16 old networkstatus documents
  31450. indefinitely, if they came from nontrusted authorities. Now we
  31451. discard them if they are more than 10 days old.
  31452. - Fix a crash bug in the presence of DNS hijacking (reported by Andrew
  31453. Del Vecchio).
  31454. - Detect and reject malformed DNS responses containing circular
  31455. pointer loops.
  31456. - If exits are rare enough that we're not marking exits as guards,
  31457. ignore exit bandwidth when we're deciding the required bandwidth
  31458. to become a guard.
  31459. - When we're handling a directory connection tunneled over Tor,
  31460. don't fill up internal memory buffers with all the data we want
  31461. to tunnel; instead, only add it if the OR connection that will
  31462. eventually receive it has some room for it. (This can lead to
  31463. slowdowns in tunneled dir connections; a better solution will have
  31464. to wait for 0.2.0.)
  31465. o Minor bugfixes (dns):
  31466. - Add some defensive programming to eventdns.c in an attempt to catch
  31467. possible memory-stomping bugs.
  31468. - Detect and reject DNS replies containing IPv4 or IPv6 records with
  31469. an incorrect number of bytes. (Previously, we would ignore the
  31470. extra bytes.)
  31471. - Fix as-yet-unused reverse IPv6 lookup code so it sends nybbles
  31472. in the correct order, and doesn't crash.
  31473. - Free memory held in recently-completed DNS lookup attempts on exit.
  31474. This was not a memory leak, but may have been hiding memory leaks.
  31475. - Handle TTL values correctly on reverse DNS lookups.
  31476. - Treat failure to parse resolv.conf as an error.
  31477. o Minor bugfixes (other):
  31478. - Fix crash with "tor --list-fingerprint" (reported by seeess).
  31479. - When computing clock skew from directory HTTP headers, consider what
  31480. time it was when we finished asking for the directory, not what
  31481. time it is now.
  31482. - Expire socks connections if they spend too long waiting for the
  31483. handshake to finish. Previously we would let them sit around for
  31484. days, if the connecting application didn't close them either.
  31485. - And if the socks handshake hasn't started, don't send a
  31486. "DNS resolve socks failed" handshake reply; just close it.
  31487. - Stop using C functions that OpenBSD's linker doesn't like.
  31488. - Don't launch requests for descriptors unless we have networkstatuses
  31489. from at least half of the authorities. This delays the first
  31490. download slightly under pathological circumstances, but can prevent
  31491. us from downloading a bunch of descriptors we don't need.
  31492. - Do not log IPs with TLS failures for incoming TLS
  31493. connections. (Fixes bug 382.)
  31494. - If the user asks to use invalid exit nodes, be willing to use
  31495. unstable ones.
  31496. - Stop using the reserved ac_cv namespace in our configure script.
  31497. - Call stat() slightly less often; use fstat() when possible.
  31498. - Refactor the way we handle pending circuits when an OR connection
  31499. completes or fails, in an attempt to fix a rare crash bug.
  31500. - Only rewrite a conn's address based on X-Forwarded-For: headers
  31501. if it's a parseable public IP address; and stop adding extra quotes
  31502. to the resulting address.
  31503. o Major features:
  31504. - Weight directory requests by advertised bandwidth. Now we can
  31505. let servers enable write limiting but still allow most clients to
  31506. succeed at their directory requests. (We still ignore weights when
  31507. choosing a directory authority; I hope this is a feature.)
  31508. o Minor features:
  31509. - Create a new file ReleaseNotes which was the old ChangeLog. The
  31510. new ChangeLog file now includes the summaries for all development
  31511. versions too.
  31512. - Check for addresses with invalid characters at the exit as well
  31513. as at the client, and warn less verbosely when they fail. You can
  31514. override this by setting ServerDNSAllowNonRFC953Addresses to 1.
  31515. - Adapt a patch from goodell to let the contrib/exitlist script
  31516. take arguments rather than require direct editing.
  31517. - Inform the server operator when we decide not to advertise a
  31518. DirPort due to AccountingMax enabled or a low BandwidthRate. It
  31519. was confusing Zax, so now we're hopefully more helpful.
  31520. - Bring us one step closer to being able to establish an encrypted
  31521. directory tunnel without knowing a descriptor first. Still not
  31522. ready yet. As part of the change, now assume we can use a
  31523. create_fast cell if we don't know anything about a router.
  31524. - Allow exit nodes to use nameservers running on ports other than 53.
  31525. - Servers now cache reverse DNS replies.
  31526. - Add an --ignore-missing-torrc command-line option so that we can
  31527. get the "use sensible defaults if the configuration file doesn't
  31528. exist" behavior even when specifying a torrc location on the command
  31529. line.
  31530. o Minor features (controller):
  31531. - Track reasons for OR connection failure; make these reasons
  31532. available via the controller interface. (Patch from Mike Perry.)
  31533. - Add a SOCKS_BAD_HOSTNAME client status event so controllers
  31534. can learn when clients are sending malformed hostnames to Tor.
  31535. - Clean up documentation for controller status events.
  31536. - Add a REMAP status to stream events to note that a stream's
  31537. address has changed because of a cached address or a MapAddress
  31538. directive.
  31539. Changes in version 0.1.2.6-alpha - 2007-01-09
  31540. o Major bugfixes:
  31541. - Fix an assert error introduced in 0.1.2.5-alpha: if a single TLS
  31542. connection handles more than 4 gigs in either direction, we crash.
  31543. - Fix an assert error introduced in 0.1.2.5-alpha: if we're an
  31544. advertised exit node, somebody might try to exit from us when
  31545. we're bootstrapping and before we've built our descriptor yet.
  31546. Refuse the connection rather than crashing.
  31547. o Minor bugfixes:
  31548. - Warn if we (as a server) find that we've resolved an address that we
  31549. weren't planning to resolve.
  31550. - Warn that using select() on any libevent version before 1.1 will be
  31551. unnecessarily slow (even for select()).
  31552. - Flush ERR-level controller status events just like we currently
  31553. flush ERR-level log events, so that a Tor shutdown doesn't prevent
  31554. the controller from learning about current events.
  31555. o Minor features (more controller status events):
  31556. - Implement EXTERNAL_ADDRESS server status event so controllers can
  31557. learn when our address changes.
  31558. - Implement BAD_SERVER_DESCRIPTOR server status event so controllers
  31559. can learn when directories reject our descriptor.
  31560. - Implement SOCKS_UNKNOWN_PROTOCOL client status event so controllers
  31561. can learn when a client application is speaking a non-socks protocol
  31562. to our SocksPort.
  31563. - Implement DANGEROUS_SOCKS client status event so controllers
  31564. can learn when a client application is leaking DNS addresses.
  31565. - Implement BUG general status event so controllers can learn when
  31566. Tor is unhappy about its internal invariants.
  31567. - Implement CLOCK_SKEW general status event so controllers can learn
  31568. when Tor thinks the system clock is set incorrectly.
  31569. - Implement GOOD_SERVER_DESCRIPTOR and ACCEPTED_SERVER_DESCRIPTOR
  31570. server status events so controllers can learn when their descriptors
  31571. are accepted by a directory.
  31572. - Implement CHECKING_REACHABILITY and REACHABILITY_{SUCCEEDED|FAILED}
  31573. server status events so controllers can learn about Tor's progress in
  31574. deciding whether it's reachable from the outside.
  31575. - Implement BAD_LIBEVENT general status event so controllers can learn
  31576. when we have a version/method combination in libevent that needs to
  31577. be changed.
  31578. - Implement NAMESERVER_STATUS, NAMESERVER_ALL_DOWN, DNS_HIJACKED,
  31579. and DNS_USELESS server status events so controllers can learn
  31580. about changes to DNS server status.
  31581. o Minor features (directory):
  31582. - Authorities no longer recommend exits as guards if this would shift
  31583. too much load to the exit nodes.
  31584. Changes in version 0.1.2.5-alpha - 2007-01-06
  31585. o Major features:
  31586. - Enable write limiting as well as read limiting. Now we sacrifice
  31587. capacity if we're pushing out lots of directory traffic, rather
  31588. than overrunning the user's intended bandwidth limits.
  31589. - Include TLS overhead when counting bandwidth usage; previously, we
  31590. would count only the bytes sent over TLS, but not the bytes used
  31591. to send them.
  31592. - Support running the Tor service with a torrc not in the same
  31593. directory as tor.exe and default to using the torrc located in
  31594. the %appdata%\Tor\ of the user who installed the service. Patch
  31595. from Matt Edman.
  31596. - Servers now check for the case when common DNS requests are going to
  31597. wildcarded addresses (i.e. all getting the same answer), and change
  31598. their exit policy to reject *:* if it's happening.
  31599. - Implement BEGIN_DIR cells, so we can connect to the directory
  31600. server via TLS to do encrypted directory requests rather than
  31601. plaintext. Enable via the TunnelDirConns and PreferTunneledDirConns
  31602. config options if you like.
  31603. o Minor features (config and docs):
  31604. - Start using the state file to store bandwidth accounting data:
  31605. the bw_accounting file is now obsolete. We'll keep generating it
  31606. for a while for people who are still using 0.1.2.4-alpha.
  31607. - Try to batch changes to the state file so that we do as few
  31608. disk writes as possible while still storing important things in
  31609. a timely fashion.
  31610. - The state file and the bw_accounting file get saved less often when
  31611. the AvoidDiskWrites config option is set.
  31612. - Make PIDFile work on Windows (untested).
  31613. - Add internal descriptions for a bunch of configuration options:
  31614. accessible via controller interface and in comments in saved
  31615. options files.
  31616. - Reject *:563 (NNTPS) in the default exit policy. We already reject
  31617. NNTP by default, so this seems like a sensible addition.
  31618. - Clients now reject hostnames with invalid characters. This should
  31619. avoid some inadvertent info leaks. Add an option
  31620. AllowNonRFC953Hostnames to disable this behavior, in case somebody
  31621. is running a private network with hosts called @, !, and #.
  31622. - Add a maintainer script to tell us which options are missing
  31623. documentation: "make check-docs".
  31624. - Add a new address-spec.txt document to describe our special-case
  31625. addresses: .exit, .onion, and .noconnnect.
  31626. o Minor features (DNS):
  31627. - Ongoing work on eventdns infrastructure: now it has dns server
  31628. and ipv6 support. One day Tor will make use of it.
  31629. - Add client-side caching for reverse DNS lookups.
  31630. - Add support to tor-resolve tool for reverse lookups and SOCKS5.
  31631. - When we change nameservers or IP addresses, reset and re-launch
  31632. our tests for DNS hijacking.
  31633. o Minor features (directory):
  31634. - Authorities now specify server versions in networkstatus. This adds
  31635. about 2% to the size of compressed networkstatus docs, and allows
  31636. clients to tell which servers support BEGIN_DIR and which don't.
  31637. The implementation is forward-compatible with a proposed future
  31638. protocol version scheme not tied to Tor versions.
  31639. - DirServer configuration lines now have an orport= option so
  31640. clients can open encrypted tunnels to the authorities without
  31641. having downloaded their descriptors yet. Enabled for moria1,
  31642. moria2, tor26, and lefkada now in the default configuration.
  31643. - Directory servers are more willing to send a 503 "busy" if they
  31644. are near their write limit, especially for v1 directory requests.
  31645. Now they can use their limited bandwidth for actual Tor traffic.
  31646. - Clients track responses with status 503 from dirservers. After a
  31647. dirserver has given us a 503, we try not to use it until an hour has
  31648. gone by, or until we have no dirservers that haven't given us a 503.
  31649. - When we get a 503 from a directory, and we're not a server, we don't
  31650. count the failure against the total number of failures allowed
  31651. for the thing we're trying to download.
  31652. - Report X-Your-Address-Is correctly from tunneled directory
  31653. connections; don't report X-Your-Address-Is when it's an internal
  31654. address; and never believe reported remote addresses when they're
  31655. internal.
  31656. - Protect against an unlikely DoS attack on directory servers.
  31657. - Add a BadDirectory flag to network status docs so that authorities
  31658. can (eventually) tell clients about caches they believe to be
  31659. broken.
  31660. o Minor features (controller):
  31661. - Have GETINFO dir/status/* work on hosts with DirPort disabled.
  31662. - Reimplement GETINFO so that info/names stays in sync with the
  31663. actual keys.
  31664. - Implement "GETINFO fingerprint".
  31665. - Implement "SETEVENTS GUARD" so controllers can get updates on
  31666. entry guard status as it changes.
  31667. o Minor features (clean up obsolete pieces):
  31668. - Remove some options that have been deprecated since at least
  31669. 0.1.0.x: AccountingMaxKB, LogFile, DebugLogFile, LogLevel, and
  31670. SysLog. Use AccountingMax instead of AccountingMaxKB, and use Log
  31671. to set log options.
  31672. - We no longer look for identity and onion keys in "identity.key" and
  31673. "onion.key" -- these were replaced by secret_id_key and
  31674. secret_onion_key in 0.0.8pre1.
  31675. - We no longer require unrecognized directory entries to be
  31676. preceded by "opt".
  31677. o Major bugfixes (security):
  31678. - Stop sending the HttpProxyAuthenticator string to directory
  31679. servers when directory connections are tunnelled through Tor.
  31680. - Clients no longer store bandwidth history in the state file.
  31681. - Do not log introduction points for hidden services if SafeLogging
  31682. is set.
  31683. - When generating bandwidth history, round down to the nearest
  31684. 1k. When storing accounting data, round up to the nearest 1k.
  31685. - When we're running as a server, remember when we last rotated onion
  31686. keys, so that we will rotate keys once they're a week old even if
  31687. we never stay up for a week ourselves.
  31688. o Major bugfixes (other):
  31689. - Fix a longstanding bug in eventdns that prevented the count of
  31690. timed-out resolves from ever being reset. This bug caused us to
  31691. give up on a nameserver the third time it timed out, and try it
  31692. 10 seconds later... and to give up on it every time it timed out
  31693. after that.
  31694. - Take out the '5 second' timeout from the connection retry
  31695. schedule. Now the first connect attempt will wait a full 10
  31696. seconds before switching to a new circuit. Perhaps this will help
  31697. a lot. Based on observations from Mike Perry.
  31698. - Fix a bug on the Windows implementation of tor_mmap_file() that
  31699. would prevent the cached-routers file from ever loading. Reported
  31700. by John Kimble.
  31701. o Minor bugfixes:
  31702. - Fix an assert failure when a directory authority sets
  31703. AuthDirRejectUnlisted and then receives a descriptor from an
  31704. unlisted router. Reported by seeess.
  31705. - Avoid a double-free when parsing malformed DirServer lines.
  31706. - Fix a bug when a BSD-style PF socket is first used. Patch from
  31707. Fabian Keil.
  31708. - Fix a bug in 0.1.2.2-alpha that prevented clients from asking
  31709. to resolve an address at a given exit node even when they ask for
  31710. it by name.
  31711. - Servers no longer ever list themselves in their "family" line,
  31712. even if configured to do so. This makes it easier to configure
  31713. family lists conveniently.
  31714. - When running as a server, don't fall back to 127.0.0.1 when no
  31715. nameservers are configured in /etc/resolv.conf; instead, make the
  31716. user fix resolv.conf or specify nameservers explicitly. (Resolves
  31717. bug 363.)
  31718. - Stop accepting certain malformed ports in configured exit policies.
  31719. - Don't re-write the fingerprint file every restart, unless it has
  31720. changed.
  31721. - Stop warning when a single nameserver fails: only warn when _all_ of
  31722. our nameservers have failed. Also, when we only have one nameserver,
  31723. raise the threshold for deciding that the nameserver is dead.
  31724. - Directory authorities now only decide that routers are reachable
  31725. if their identity keys are as expected.
  31726. - When the user uses bad syntax in the Log config line, stop
  31727. suggesting other bad syntax as a replacement.
  31728. - Correctly detect ipv6 DNS capability on OpenBSD.
  31729. o Minor bugfixes (controller):
  31730. - Report the circuit number correctly in STREAM CLOSED events. Bug
  31731. reported by Mike Perry.
  31732. - Do not report bizarre values for results of accounting GETINFOs
  31733. when the last second's write or read exceeds the allotted bandwidth.
  31734. - Report "unrecognized key" rather than an empty string when the
  31735. controller tries to fetch a networkstatus that doesn't exist.
  31736. Changes in version 0.1.1.26 - 2006-12-14
  31737. o Security bugfixes:
  31738. - Stop sending the HttpProxyAuthenticator string to directory
  31739. servers when directory connections are tunnelled through Tor.
  31740. - Clients no longer store bandwidth history in the state file.
  31741. - Do not log introduction points for hidden services if SafeLogging
  31742. is set.
  31743. o Minor bugfixes:
  31744. - Fix an assert failure when a directory authority sets
  31745. AuthDirRejectUnlisted and then receives a descriptor from an
  31746. unlisted router (reported by seeess).
  31747. Changes in version 0.1.2.4-alpha - 2006-12-03
  31748. o Major features:
  31749. - Add support for using natd; this allows FreeBSDs earlier than
  31750. 5.1.2 to have ipfw send connections through Tor without using
  31751. SOCKS. (Patch from Zajcev Evgeny with tweaks from tup.)
  31752. o Minor features:
  31753. - Make all connections to addresses of the form ".noconnect"
  31754. immediately get closed. This lets application/controller combos
  31755. successfully test whether they're talking to the same Tor by
  31756. watching for STREAM events.
  31757. - Make cross.sh cross-compilation script work even when autogen.sh
  31758. hasn't been run. (Patch from Michael Mohr.)
  31759. - Statistics dumped by -USR2 now include a breakdown of public key
  31760. operations, for profiling.
  31761. o Major bugfixes:
  31762. - Fix a major leak when directory authorities parse their
  31763. approved-routers list, a minor memory leak when we fail to pick
  31764. an exit node, and a few rare leaks on errors.
  31765. - Handle TransPort connections even when the server sends data before
  31766. the client sends data. Previously, the connection would just hang
  31767. until the client sent data. (Patch from tup based on patch from
  31768. Zajcev Evgeny.)
  31769. - Avoid assert failure when our cached-routers file is empty on
  31770. startup.
  31771. o Minor bugfixes:
  31772. - Don't log spurious warnings when we see a circuit close reason we
  31773. don't recognize; it's probably just from a newer version of Tor.
  31774. - Have directory authorities allow larger amounts of drift in uptime
  31775. without replacing the server descriptor: previously, a server that
  31776. restarted every 30 minutes could have 48 "interesting" descriptors
  31777. per day.
  31778. - Start linking to the Tor specification and Tor reference manual
  31779. correctly in the Windows installer.
  31780. - Add Vidalia to the OS X uninstaller script, so when we uninstall
  31781. Tor/Privoxy we also uninstall Vidalia.
  31782. - Resume building on Irix64, and fix a lot of warnings from its
  31783. MIPSpro C compiler.
  31784. - Don't corrupt last_guessed_ip in router_new_address_suggestion()
  31785. when we're running as a client.
  31786. Changes in version 0.1.1.25 - 2006-11-04
  31787. o Major bugfixes:
  31788. - When a client asks us to resolve (rather than connect to)
  31789. an address, and we have a cached answer, give them the cached
  31790. answer. Previously, we would give them no answer at all.
  31791. - We were building exactly the wrong circuits when we predict
  31792. hidden service requirements, meaning Tor would have to build all
  31793. its circuits on demand.
  31794. - If none of our live entry guards have a high uptime, but we
  31795. require a guard with a high uptime, try adding a new guard before
  31796. we give up on the requirement. This patch should make long-lived
  31797. connections more stable on average.
  31798. - When testing reachability of our DirPort, don't launch new
  31799. tests when there's already one in progress -- unreachable
  31800. servers were stacking up dozens of testing streams.
  31801. o Security bugfixes:
  31802. - When the user sends a NEWNYM signal, clear the client-side DNS
  31803. cache too. Otherwise we continue to act on previous information.
  31804. o Minor bugfixes:
  31805. - Avoid a memory corruption bug when creating a hash table for
  31806. the first time.
  31807. - Avoid possibility of controller-triggered crash when misusing
  31808. certain commands from a v0 controller on platforms that do not
  31809. handle printf("%s",NULL) gracefully.
  31810. - Avoid infinite loop on unexpected controller input.
  31811. - Don't log spurious warnings when we see a circuit close reason we
  31812. don't recognize; it's probably just from a newer version of Tor.
  31813. - Add Vidalia to the OS X uninstaller script, so when we uninstall
  31814. Tor/Privoxy we also uninstall Vidalia.
  31815. Changes in version 0.1.2.3-alpha - 2006-10-29
  31816. o Minor features:
  31817. - Prepare for servers to publish descriptors less often: never
  31818. discard a descriptor simply for being too old until either it is
  31819. recommended by no authorities, or until we get a better one for
  31820. the same router. Make caches consider retaining old recommended
  31821. routers for even longer.
  31822. - If most authorities set a BadExit flag for a server, clients
  31823. don't think of it as a general-purpose exit. Clients only consider
  31824. authorities that advertise themselves as listing bad exits.
  31825. - Directory servers now provide 'Pragma: no-cache' and 'Expires'
  31826. headers for content, so that we can work better in the presence of
  31827. caching HTTP proxies.
  31828. - Allow authorities to list nodes as bad exits by fingerprint or by
  31829. address.
  31830. o Minor features, controller:
  31831. - Add a REASON field to CIRC events; for backward compatibility, this
  31832. field is sent only to controllers that have enabled the extended
  31833. event format. Also, add additional reason codes to explain why
  31834. a given circuit has been destroyed or truncated. (Patches from
  31835. Mike Perry)
  31836. - Add a REMOTE_REASON field to extended CIRC events to tell the
  31837. controller about why a remote OR told us to close a circuit.
  31838. - Stream events also now have REASON and REMOTE_REASON fields,
  31839. working much like those for circuit events.
  31840. - There's now a GETINFO ns/... field so that controllers can ask Tor
  31841. about the current status of a router.
  31842. - A new event type "NS" to inform a controller when our opinion of
  31843. a router's status has changed.
  31844. - Add a GETINFO events/names and GETINFO features/names so controllers
  31845. can tell which events and features are supported.
  31846. - A new CLEARDNSCACHE signal to allow controllers to clear the
  31847. client-side DNS cache without expiring circuits.
  31848. o Security bugfixes:
  31849. - When the user sends a NEWNYM signal, clear the client-side DNS
  31850. cache too. Otherwise we continue to act on previous information.
  31851. o Minor bugfixes:
  31852. - Avoid sending junk to controllers or segfaulting when a controller
  31853. uses EVENT_NEW_DESC with verbose nicknames.
  31854. - Stop triggering asserts if the controller tries to extend hidden
  31855. service circuits (reported by mwenge).
  31856. - Avoid infinite loop on unexpected controller input.
  31857. - When the controller does a "GETINFO network-status", tell it
  31858. about even those routers whose descriptors are very old, and use
  31859. long nicknames where appropriate.
  31860. - Change NT service functions to be loaded on demand. This lets us
  31861. build with MinGW without breaking Tor for Windows 98 users.
  31862. - Do DirPort reachability tests less often, since a single test
  31863. chews through many circuits before giving up.
  31864. - In the hidden service example in torrc.sample, stop recommending
  31865. esoteric and discouraged hidden service options.
  31866. - When stopping an NT service, wait up to 10 sec for it to actually
  31867. stop. Patch from Matt Edman; resolves bug 295.
  31868. - Fix handling of verbose nicknames with ORCONN controller events:
  31869. make them show up exactly when requested, rather than exactly when
  31870. not requested.
  31871. - When reporting verbose nicknames in entry_guards_getinfo(), avoid
  31872. printing a duplicate "$" in the keys we send (reported by mwenge).
  31873. - Correctly set maximum connection limit on Cygwin. (This time
  31874. for sure!)
  31875. - Try to detect Windows correctly when cross-compiling.
  31876. - Detect the size of the routers file correctly even if it is
  31877. corrupted (on systems without mmap) or not page-aligned (on systems
  31878. with mmap). This bug was harmless.
  31879. - Sometimes we didn't bother sending a RELAY_END cell when an attempt
  31880. to open a stream fails; now we do in more cases. This should
  31881. make clients able to find a good exit faster in some cases, since
  31882. unhandleable requests will now get an error rather than timing out.
  31883. - Resolve two memory leaks when rebuilding the on-disk router cache
  31884. (reported by fookoowa).
  31885. - Clean up minor code warnings suggested by the MIPSpro C compiler,
  31886. and reported by some Centos users.
  31887. - Controller signals now work on non-Unix platforms that don't define
  31888. SIGUSR1 and SIGUSR2 the way we expect.
  31889. - Patch from Michael Mohr to contrib/cross.sh, so it checks more
  31890. values before failing, and always enables eventdns.
  31891. - Libevent-1.2 exports, but does not define in its headers, strlcpy.
  31892. Try to fix this in configure.in by checking for most functions
  31893. before we check for libevent.
  31894. Changes in version 0.1.2.2-alpha - 2006-10-07
  31895. o Major features:
  31896. - Make our async eventdns library on-by-default for Tor servers,
  31897. and plan to deprecate the separate dnsworker threads.
  31898. - Add server-side support for "reverse" DNS lookups (using PTR
  31899. records so clients can determine the canonical hostname for a given
  31900. IPv4 address). Only supported by servers using eventdns; servers
  31901. now announce in their descriptors whether they support eventdns.
  31902. - Specify and implement client-side SOCKS5 interface for reverse DNS
  31903. lookups (see doc/socks-extensions.txt).
  31904. - Add a BEGIN_DIR relay cell type for an easier in-protocol way to
  31905. connect to directory servers through Tor. Previously, clients needed
  31906. to find Tor exits to make private connections to directory servers.
  31907. - Avoid choosing Exit nodes for entry or middle hops when the
  31908. total bandwidth available from non-Exit nodes is much higher than
  31909. the total bandwidth available from Exit nodes.
  31910. - Workaround for name servers (like Earthlink's) that hijack failing
  31911. DNS requests and replace the no-such-server answer with a "helpful"
  31912. redirect to an advertising-driven search portal. Also work around
  31913. DNS hijackers who "helpfully" decline to hijack known-invalid
  31914. RFC2606 addresses. Config option "ServerDNSDetectHijacking 0"
  31915. lets you turn it off.
  31916. - Send out a burst of long-range padding cells once we've established
  31917. that we're reachable. Spread them over 4 circuits, so hopefully
  31918. a few will be fast. This exercises our bandwidth and bootstraps
  31919. us into the directory more quickly.
  31920. o New/improved config options:
  31921. - Add new config option "ResolvConf" to let the server operator
  31922. choose an alternate resolve.conf file when using eventdns.
  31923. - Add an "EnforceDistinctSubnets" option to control our "exclude
  31924. servers on the same /16" behavior. It's still on by default; this
  31925. is mostly for people who want to operate private test networks with
  31926. all the machines on the same subnet.
  31927. - If one of our entry guards is on the ExcludeNodes list, or the
  31928. directory authorities don't think it's a good guard, treat it as
  31929. if it were unlisted: stop using it as a guard, and throw it off
  31930. the guards list if it stays that way for a long time.
  31931. - Allow directory authorities to be marked separately as authorities
  31932. for the v1 directory protocol, the v2 directory protocol, and
  31933. as hidden service directories, to make it easier to retire old
  31934. authorities. V1 authorities should set "HSAuthoritativeDir 1"
  31935. to continue being hidden service authorities too.
  31936. - Remove 8888 as a LongLivedPort, and add 6697 (IRCS).
  31937. o Minor features, controller:
  31938. - Fix CIRC controller events so that controllers can learn the
  31939. identity digests of non-Named servers used in circuit paths.
  31940. - Let controllers ask for more useful identifiers for servers. Instead
  31941. of learning identity digests for un-Named servers and nicknames
  31942. for Named servers, the new identifiers include digest, nickname,
  31943. and indication of Named status. Off by default; see control-spec.txt
  31944. for more information.
  31945. - Add a "getinfo address" controller command so it can display Tor's
  31946. best guess to the user.
  31947. - New controller event to alert the controller when our server
  31948. descriptor has changed.
  31949. - Give more meaningful errors on controller authentication failure.
  31950. o Minor features, other:
  31951. - When asked to resolve a hostname, don't use non-exit servers unless
  31952. requested to do so. This allows servers with broken DNS to be
  31953. useful to the network.
  31954. - Divide eventdns log messages into warn and info messages.
  31955. - Reserve the nickname "Unnamed" for routers that can't pick
  31956. a hostname: any router can call itself Unnamed; directory
  31957. authorities will never allocate Unnamed to any particular router;
  31958. clients won't believe that any router is the canonical Unnamed.
  31959. - Only include function names in log messages for info/debug messages.
  31960. For notice/warn/err, the content of the message should be clear on
  31961. its own, and printing the function name only confuses users.
  31962. - Avoid some false positives during reachability testing: don't try
  31963. to test via a server that's on the same /24 as us.
  31964. - If we fail to build a circuit to an intended enclave, and it's
  31965. not mandatory that we use that enclave, stop wanting it.
  31966. - When eventdns is enabled, allow multithreaded builds on NetBSD and
  31967. OpenBSD. (We had previously disabled threads on these platforms
  31968. because they didn't have working thread-safe resolver functions.)
  31969. o Major bugfixes, anonymity/security:
  31970. - If a client asked for a server by name, and there's a named server
  31971. in our network-status but we don't have its descriptor yet, we
  31972. could return an unnamed server instead.
  31973. - Fix NetBSD bug that could allow someone to force uninitialized RAM
  31974. to be sent to a server's DNS resolver. This only affects NetBSD
  31975. and other platforms that do not bounds-check tolower().
  31976. - Reject (most) attempts to use Tor circuits with length one. (If
  31977. many people start using Tor as a one-hop proxy, exit nodes become
  31978. a more attractive target for compromise.)
  31979. - Just because your DirPort is open doesn't mean people should be
  31980. able to remotely teach you about hidden service descriptors. Now
  31981. only accept rendezvous posts if you've got HSAuthoritativeDir set.
  31982. o Major bugfixes, other:
  31983. - Don't crash on race condition in dns.c: tor_assert(!resolve->expire)
  31984. - When a client asks the server to resolve (not connect to)
  31985. an address, and it has a cached answer, give them the cached answer.
  31986. Previously, the server would give them no answer at all.
  31987. - Allow really slow clients to not hang up five minutes into their
  31988. directory downloads (suggested by Adam J. Richter).
  31989. - We were building exactly the wrong circuits when we anticipated
  31990. hidden service requirements, meaning Tor would have to build all
  31991. its circuits on demand.
  31992. - Avoid crashing when we mmap a router cache file of size 0.
  31993. - When testing reachability of our DirPort, don't launch new
  31994. tests when there's already one in progress -- unreachable
  31995. servers were stacking up dozens of testing streams.
  31996. o Minor bugfixes, correctness:
  31997. - If we're a directory mirror and we ask for "all" network status
  31998. documents, we would discard status documents from authorities
  31999. we don't recognize.
  32000. - Avoid a memory corruption bug when creating a hash table for
  32001. the first time.
  32002. - Avoid controller-triggered crash when misusing certain commands
  32003. from a v0 controller on platforms that do not handle
  32004. printf("%s",NULL) gracefully.
  32005. - Don't crash when a controller sends a third argument to an
  32006. "extendcircuit" request.
  32007. - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
  32008. response; fix error code when "getinfo dir/status/" fails.
  32009. - Avoid crash when telling controller stream-status and a stream
  32010. is detached.
  32011. - Patch from Adam Langley to fix assert() in eventdns.c.
  32012. - Fix a debug log message in eventdns to say "X resolved to Y"
  32013. instead of "X resolved to X".
  32014. - Make eventdns give strings for DNS errors, not just error numbers.
  32015. - Track unreachable entry guards correctly: don't conflate
  32016. 'unreachable by us right now' with 'listed as down by the directory
  32017. authorities'. With the old code, if a guard was unreachable by
  32018. us but listed as running, it would clog our guard list forever.
  32019. - Behave correctly in case we ever have a network with more than
  32020. 2GB/s total advertised capacity.
  32021. - Make TrackExitHosts case-insensitive, and fix the behavior of
  32022. ".suffix" TrackExitHosts items to avoid matching in the middle of
  32023. an address.
  32024. - Finally fix the openssl warnings from newer gccs that believe that
  32025. ignoring a return value is okay, but casting a return value and
  32026. then ignoring it is a sign of madness.
  32027. - Prevent the contrib/exitlist script from printing the same
  32028. result more than once.
  32029. - Patch from Steve Hildrey: Generate network status correctly on
  32030. non-versioning dirservers.
  32031. - Don't listen to the X-Your-Address-Is hint if you did the lookup
  32032. via Tor; otherwise you'll think you're the exit node's IP address.
  32033. o Minor bugfixes, performance:
  32034. - Two small performance improvements on parsing descriptors.
  32035. - Major performance improvement on inserting descriptors: change
  32036. algorithm from O(n^2) to O(n).
  32037. - Make the common memory allocation path faster on machines where
  32038. malloc(0) returns a pointer.
  32039. - Start remembering X-Your-Address-Is directory hints even if you're
  32040. a client, so you can become a server more smoothly.
  32041. - Avoid duplicate entries on MyFamily line in server descriptor.
  32042. o Packaging, features:
  32043. - Remove architecture from OS X builds. The official builds are
  32044. now universal binaries.
  32045. - The Debian package now uses --verify-config when (re)starting,
  32046. to distinguish configuration errors from other errors.
  32047. - Update RPMs to require libevent 1.1b.
  32048. o Packaging, bugfixes:
  32049. - Patches so Tor builds with MinGW on Windows.
  32050. - Patches so Tor might run on Cygwin again.
  32051. - Resume building on non-gcc compilers and ancient gcc. Resume
  32052. building with the -O0 compile flag. Resume building cleanly on
  32053. Debian woody.
  32054. - Run correctly on OS X platforms with case-sensitive filesystems.
  32055. - Correct includes for net/if.h and net/pfvar.h on OpenBSD (from Tup).
  32056. - Add autoconf checks so Tor can build on Solaris x86 again.
  32057. o Documentation
  32058. - Documented (and renamed) ServerDNSSearchDomains and
  32059. ServerDNSResolvConfFile options.
  32060. - Be clearer that the *ListenAddress directives can be repeated
  32061. multiple times.
  32062. Changes in version 0.1.1.24 - 2006-09-29
  32063. o Major bugfixes:
  32064. - Allow really slow clients to not hang up five minutes into their
  32065. directory downloads (suggested by Adam J. Richter).
  32066. - Fix major performance regression from 0.1.0.x: instead of checking
  32067. whether we have enough directory information every time we want to
  32068. do something, only check when the directory information has changed.
  32069. This should improve client CPU usage by 25-50%.
  32070. - Don't crash if, after a server has been running for a while,
  32071. it can't resolve its hostname.
  32072. o Minor bugfixes:
  32073. - Allow Tor to start when RunAsDaemon is set but no logs are set.
  32074. - Don't crash when the controller receives a third argument to an
  32075. "extendcircuit" request.
  32076. - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
  32077. response; fix error code when "getinfo dir/status/" fails.
  32078. - Fix configure.in to not produce broken configure files with
  32079. more recent versions of autoconf. Thanks to Clint for his auto*
  32080. voodoo.
  32081. - Fix security bug on NetBSD that could allow someone to force
  32082. uninitialized RAM to be sent to a server's DNS resolver. This
  32083. only affects NetBSD and other platforms that do not bounds-check
  32084. tolower().
  32085. - Warn user when using libevent 1.1a or earlier with win32 or kqueue
  32086. methods: these are known to be buggy.
  32087. - If we're a directory mirror and we ask for "all" network status
  32088. documents, we would discard status documents from authorities
  32089. we don't recognize.
  32090. Changes in version 0.1.2.1-alpha - 2006-08-27
  32091. o Major features:
  32092. - Add "eventdns" async dns library from Adam Langley, tweaked to
  32093. build on OSX and Windows. Only enabled if you pass the
  32094. --enable-eventdns argument to configure.
  32095. - Allow servers with no hostname or IP address to learn their
  32096. IP address by asking the directory authorities. This code only
  32097. kicks in when you would normally have exited with a "no address"
  32098. error. Nothing's authenticated, so use with care.
  32099. - Rather than waiting a fixed amount of time between retrying
  32100. application connections, we wait only 5 seconds for the first,
  32101. 10 seconds for the second, and 15 seconds for each retry after
  32102. that. Hopefully this will improve the expected user experience.
  32103. - Patch from Tup to add support for transparent AP connections:
  32104. this basically bundles the functionality of trans-proxy-tor
  32105. into the Tor mainline. Now hosts with compliant pf/netfilter
  32106. implementations can redirect TCP connections straight to Tor
  32107. without diverting through SOCKS. Needs docs.
  32108. - Busy directory servers save lots of memory by spooling server
  32109. descriptors, v1 directories, and v2 networkstatus docs to buffers
  32110. as needed rather than en masse. Also mmap the cached-routers
  32111. files, so we don't need to keep the whole thing in memory too.
  32112. - Automatically avoid picking more than one node from the same
  32113. /16 network when constructing a circuit.
  32114. - Revise and clean up the torrc.sample that we ship with; add
  32115. a section for BandwidthRate and BandwidthBurst.
  32116. o Minor features:
  32117. - Split circuit_t into origin_circuit_t and or_circuit_t, and
  32118. split connection_t into edge, or, dir, control, and base structs.
  32119. These will save quite a bit of memory on busy servers, and they'll
  32120. also help us track down bugs in the code and bugs in the spec.
  32121. - Experimentally re-enable kqueue on OSX when using libevent 1.1b
  32122. or later. Log when we are doing this, so we can diagnose it when
  32123. it fails. (Also, recommend libevent 1.1b for kqueue and
  32124. win32 methods; deprecate libevent 1.0b harder; make libevent
  32125. recommendation system saner.)
  32126. - Start being able to build universal binaries on OS X (thanks
  32127. to Phobos).
  32128. - Export the default exit policy via the control port, so controllers
  32129. don't need to guess what it is / will be later.
  32130. - Add a man page entry for ProtocolWarnings.
  32131. - Add TestVia config option to the man page.
  32132. - Remove even more protocol-related warnings from Tor server logs,
  32133. such as bad TLS handshakes and malformed begin cells.
  32134. - Stop fetching descriptors if you're not a dir mirror and you
  32135. haven't tried to establish any circuits lately. [This currently
  32136. causes some dangerous behavior, because when you start up again
  32137. you'll use your ancient server descriptors.]
  32138. - New DirPort behavior: if you have your dirport set, you download
  32139. descriptors aggressively like a directory mirror, whether or not
  32140. your ORPort is set.
  32141. - Get rid of the router_retry_connections notion. Now routers
  32142. no longer try to rebuild long-term connections to directory
  32143. authorities, and directory authorities no longer try to rebuild
  32144. long-term connections to all servers. We still don't hang up
  32145. connections in these two cases though -- we need to look at it
  32146. more carefully to avoid flapping, and we likely need to wait til
  32147. 0.1.1.x is obsolete.
  32148. - Drop compatibility with obsolete Tors that permit create cells
  32149. to have the wrong circ_id_type.
  32150. - Re-enable per-connection rate limiting. Get rid of the "OP
  32151. bandwidth" concept. Lay groundwork for "bandwidth classes" --
  32152. separate global buckets that apply depending on what sort of conn
  32153. it is.
  32154. - Start publishing one minute or so after we find our ORPort
  32155. to be reachable. This will help reduce the number of descriptors
  32156. we have for ourselves floating around, since it's quite likely
  32157. other things (e.g. DirPort) will change during that minute too.
  32158. - Fork the v1 directory protocol into its own spec document,
  32159. and mark dir-spec.txt as the currently correct (v2) spec.
  32160. o Major bugfixes:
  32161. - When we find our DirPort to be reachable, publish a new descriptor
  32162. so we'll tell the world (reported by pnx).
  32163. - Publish a new descriptor after we hup/reload. This is important
  32164. if our config has changed such that we'll want to start advertising
  32165. our DirPort now, etc.
  32166. - Allow Tor to start when RunAsDaemon is set but no logs are set.
  32167. - When we have a state file we cannot parse, tell the user and
  32168. move it aside. Now we avoid situations where the user starts
  32169. Tor in 1904, Tor writes a state file with that timestamp in it,
  32170. the user fixes her clock, and Tor refuses to start.
  32171. - Fix configure.in to not produce broken configure files with
  32172. more recent versions of autoconf. Thanks to Clint for his auto*
  32173. voodoo.
  32174. - "tor --verify-config" now exits with -1(255) or 0 depending on
  32175. whether the config options are bad or good.
  32176. - Resolve bug 321 when using dnsworkers: append a period to every
  32177. address we resolve at the exit node, so that we do not accidentally
  32178. pick up local addresses, and so that failing searches are retried
  32179. in the resolver search domains. (This is already solved for
  32180. eventdns.) (This breaks Blossom servers for now.)
  32181. - If we are using an exit enclave and we can't connect, e.g. because
  32182. its webserver is misconfigured to not listen on localhost, then
  32183. back off and try connecting from somewhere else before we fail.
  32184. o Minor bugfixes:
  32185. - Start compiling on MinGW on Windows (patches from Mike Chiussi).
  32186. - Start compiling on MSVC6 on Windows (patches from Frediano Ziglio).
  32187. - Fix bug 314: Tor clients issued "unsafe socks" warnings even
  32188. when the IP address is mapped through MapAddress to a hostname.
  32189. - Start passing "ipv4" hints to getaddrinfo(), so servers don't do
  32190. useless IPv6 DNS resolves.
  32191. - Patch suggested by Karsten Loesing: respond to SIGNAL command
  32192. before we execute the signal, in case the signal shuts us down.
  32193. - Clean up AllowInvalidNodes man page entry.
  32194. - Claim a commonname of Tor, rather than TOR, in TLS handshakes.
  32195. - Add more asserts to track down an assert error on a windows Tor
  32196. server with connection_add being called with socket == -1.
  32197. - Handle reporting OR_CONN_EVENT_NEW events to the controller.
  32198. - Fix misleading log messages: an entry guard that is "unlisted",
  32199. as well as not known to be "down" (because we've never heard
  32200. of it), is not therefore "up".
  32201. - Remove code to special-case "-cvs" ending, since it has not
  32202. actually mattered since 0.0.9.
  32203. - Make our socks5 handling more robust to broken socks clients:
  32204. throw out everything waiting on the buffer in between socks
  32205. handshake phases, since they can't possibly (so the theory
  32206. goes) have predicted what we plan to respond to them.
  32207. Changes in version 0.1.1.23 - 2006-07-30
  32208. o Major bugfixes:
  32209. - Fast Tor servers, especially exit nodes, were triggering asserts
  32210. due to a bug in handling the list of pending DNS resolves. Some
  32211. bugs still remain here; we're hunting them.
  32212. - Entry guards could crash clients by sending unexpected input.
  32213. - More fixes on reachability testing: if you find yourself reachable,
  32214. then don't ever make any client requests (so you stop predicting
  32215. circuits), then hup or have your clock jump, then later your IP
  32216. changes, you won't think circuits are working, so you won't try to
  32217. test reachability, so you won't publish.
  32218. o Minor bugfixes:
  32219. - Avoid a crash if the controller does a resetconf firewallports
  32220. and then a setconf fascistfirewall=1.
  32221. - Avoid an integer underflow when the dir authority decides whether
  32222. a router is stable: we might wrongly label it stable, and compute
  32223. a slightly wrong median stability, when a descriptor is published
  32224. later than now.
  32225. - Fix a place where we might trigger an assert if we can't build our
  32226. own server descriptor yet.
  32227. Changes in version 0.1.1.22 - 2006-07-05
  32228. o Major bugfixes:
  32229. - Fix a big bug that was causing servers to not find themselves
  32230. reachable if they changed IP addresses. Since only 0.1.1.22+
  32231. servers can do reachability testing correctly, now we automatically
  32232. make sure to test via one of these.
  32233. - Fix to allow clients and mirrors to learn directory info from
  32234. descriptor downloads that get cut off partway through.
  32235. - Directory authorities had a bug in deciding if a newly published
  32236. descriptor was novel enough to make everybody want a copy -- a few
  32237. servers seem to be publishing new descriptors many times a minute.
  32238. o Minor bugfixes:
  32239. - Fix a rare bug that was causing some servers to complain about
  32240. "closing wedged cpuworkers" and skip some circuit create requests.
  32241. - Make the Exit flag in directory status documents actually work.
  32242. Changes in version 0.1.1.21 - 2006-06-10
  32243. o Crash and assert fixes from 0.1.1.20:
  32244. - Fix a rare crash on Tor servers that have enabled hibernation.
  32245. - Fix a seg fault on startup for Tor networks that use only one
  32246. directory authority.
  32247. - Fix an assert from a race condition that occurs on Tor servers
  32248. while exiting, where various threads are trying to log that they're
  32249. exiting, and delete the logs, at the same time.
  32250. - Make our unit tests pass again on certain obscure platforms.
  32251. o Other fixes:
  32252. - Add support for building SUSE RPM packages.
  32253. - Speed up initial bootstrapping for clients: if we are making our
  32254. first ever connection to any entry guard, then don't mark it down
  32255. right after that.
  32256. - When only one Tor server in the network is labelled as a guard,
  32257. and we've already picked him, we would cycle endlessly picking him
  32258. again, being unhappy about it, etc. Now we specifically exclude
  32259. current guards when picking a new guard.
  32260. - Servers send create cells more reliably after the TLS connection
  32261. is established: we were sometimes forgetting to send half of them
  32262. when we had more than one pending.
  32263. - If we get a create cell that asks us to extend somewhere, but the
  32264. Tor server there doesn't match the expected digest, we now send
  32265. a destroy cell back, rather than silently doing nothing.
  32266. - Make options->RedirectExit work again.
  32267. - Make cookie authentication for the controller work again.
  32268. - Stop being picky about unusual characters in the arguments to
  32269. mapaddress. It's none of our business.
  32270. - Add a new config option "TestVia" that lets you specify preferred
  32271. middle hops to use for test circuits. Perhaps this will let me
  32272. debug the reachability problems better.
  32273. o Log / documentation fixes:
  32274. - If we're a server and some peer has a broken TLS certificate, don't
  32275. log about it unless ProtocolWarnings is set, i.e., we want to hear
  32276. about protocol violations by others.
  32277. - Fix spelling of VirtualAddrNetwork in man page.
  32278. - Add a better explanation at the top of the autogenerated torrc file
  32279. about what happened to our old torrc.
  32280. Changes in version 0.1.1.20 - 2006-05-23
  32281. o Bugfixes:
  32282. - Downgrade a log severity where servers complain that they're
  32283. invalid.
  32284. - Avoid a compile warning on FreeBSD.
  32285. - Remove string size limit on NEWDESC messages; solve bug 291.
  32286. - Correct the RunAsDaemon entry in the man page; ignore RunAsDaemon
  32287. more thoroughly when we're running on windows.
  32288. Changes in version 0.1.1.19-rc - 2006-05-03
  32289. o Minor bugs:
  32290. - Regenerate our local descriptor if it's dirty and we try to use
  32291. it locally (e.g. if it changes during reachability detection).
  32292. - If we setconf our ORPort to 0, we continued to listen on the
  32293. old ORPort and receive connections.
  32294. - Avoid a second warning about machine/limits.h on Debian
  32295. GNU/kFreeBSD.
  32296. - Be willing to add our own routerinfo into the routerlist.
  32297. Now authorities will include themselves in their directories
  32298. and network-statuses.
  32299. - Stop trying to upload rendezvous descriptors to every
  32300. directory authority: only try the v1 authorities.
  32301. - Servers no longer complain when they think they're not
  32302. registered with the directory authorities. There were too many
  32303. false positives.
  32304. - Backport dist-rpm changes so rpms can be built without errors.
  32305. o Features:
  32306. - Implement an option, VirtualAddrMask, to set which addresses
  32307. get handed out in response to mapaddress requests. This works
  32308. around a bug in tsocks where 127.0.0.0/8 is never socksified.
  32309. Changes in version 0.1.1.18-rc - 2006-04-10
  32310. o Major fixes:
  32311. - Work harder to download live network-statuses from all the
  32312. directory authorities we know about. Improve the threshold
  32313. decision logic so we're more robust to edge cases.
  32314. - When fetching rendezvous descriptors, we were willing to ask
  32315. v2 authorities too, which would always return 404.
  32316. o Minor fixes:
  32317. - Stop listing down or invalid nodes in the v1 directory. This will
  32318. reduce its bulk by about 1/3, and reduce load on directory
  32319. mirrors.
  32320. - When deciding whether a router is Fast or Guard-worthy, consider
  32321. his advertised BandwidthRate and not just the BandwidthCapacity.
  32322. - No longer ship INSTALL and README files -- they are useless now.
  32323. - Force rpmbuild to behave and honor target_cpu.
  32324. - Avoid warnings about machine/limits.h on Debian GNU/kFreeBSD.
  32325. - Start to include translated versions of the tor-doc-*.html
  32326. files, along with the screenshots. Still needs more work.
  32327. - Start sending back 512 and 451 errors if mapaddress fails,
  32328. rather than not sending anything back at all.
  32329. - When we fail to bind or listen on an incoming or outgoing
  32330. socket, we should close it before failing. otherwise we just
  32331. leak it. (thanks to weasel for finding.)
  32332. - Allow "getinfo dir/status/foo" to work, as long as your DirPort
  32333. is enabled. (This is a hack, and will be fixed in 0.1.2.x.)
  32334. - Make NoPublish (even though deprecated) work again.
  32335. - Fix a minor security flaw where a versioning auth dirserver
  32336. could list a recommended version many times in a row to make
  32337. clients more convinced that it's recommended.
  32338. - Fix crash bug if there are two unregistered servers running
  32339. with the same nickname, one of them is down, and you ask for
  32340. them by nickname in your EntryNodes or ExitNodes. Also, try
  32341. to pick the one that's running rather than an arbitrary one.
  32342. - Fix an infinite loop we could hit if we go offline for too long.
  32343. - Complain when we hit WSAENOBUFS on recv() or write() too.
  32344. Perhaps this will help us hunt the bug.
  32345. - If you're not a versioning dirserver, don't put the string
  32346. "client-versions \nserver-versions \n" in your network-status.
  32347. - Lower the minimum required number of file descriptors to 1000,
  32348. so we can have some overhead for Valgrind on Linux, where the
  32349. default ulimit -n is 1024.
  32350. o New features:
  32351. - Add tor.dizum.com as the fifth authoritative directory server.
  32352. - Add a new config option FetchUselessDescriptors, off by default,
  32353. for when you plan to run "exitlist" on your client and you want
  32354. to know about even the non-running descriptors.
  32355. Changes in version 0.1.1.17-rc - 2006-03-28
  32356. o Major fixes:
  32357. - Clients and servers since 0.1.1.10-alpha have been expiring
  32358. connections whenever they are idle for 5 minutes and they *do*
  32359. have circuits on them. Oops. With this new version, clients will
  32360. discard their previous entry guard choices and avoid choosing
  32361. entry guards running these flawed versions.
  32362. - Fix memory leak when uncompressing concatenated zlib streams. This
  32363. was causing substantial leaks over time on Tor servers.
  32364. - The v1 directory was including servers as much as 48 hours old,
  32365. because that's how the new routerlist->routers works. Now only
  32366. include them if they're 20 hours old or less.
  32367. o Minor fixes:
  32368. - Resume building on irix64, netbsd 2.0, etc.
  32369. - On non-gcc compilers (e.g. solaris), use "-g -O" instead of
  32370. "-Wall -g -O2".
  32371. - Stop writing the "router.desc" file, ever. Nothing uses it anymore,
  32372. and it is confusing some users.
  32373. - Mirrors stop caching the v1 directory so often.
  32374. - Make the max number of old descriptors that a cache will hold
  32375. rise with the number of directory authorities, so we can scale.
  32376. - Change our win32 uname() hack to be more forgiving about what
  32377. win32 versions it thinks it's found.
  32378. o New features:
  32379. - Add lefkada.eecs.harvard.edu as a fourth authoritative directory
  32380. server.
  32381. - When the controller's *setconf commands fail, collect an error
  32382. message in a string and hand it back to the controller.
  32383. - Make the v2 dir's "Fast" flag based on relative capacity, just
  32384. like "Stable" is based on median uptime. Name everything in the
  32385. top 7/8 Fast, and only the top 1/2 gets to be a Guard.
  32386. - Log server fingerprint on startup, so new server operators don't
  32387. have to go hunting around their filesystem for it.
  32388. - Return a robots.txt on our dirport to discourage google indexing.
  32389. - Let the controller ask for GETINFO dir/status/foo so it can ask
  32390. directly rather than connecting to the dir port. Only works when
  32391. dirport is set for now.
  32392. o New config options rather than constants in the code:
  32393. - SocksTimeout: How long do we let a socks connection wait
  32394. unattached before we fail it?
  32395. - CircuitBuildTimeout: Cull non-open circuits that were born
  32396. at least this many seconds ago.
  32397. - CircuitIdleTimeout: Cull open clean circuits that were born
  32398. at least this many seconds ago.
  32399. Changes in version 0.1.1.16-rc - 2006-03-18
  32400. o Bugfixes on 0.1.1.15-rc:
  32401. - Fix assert when the controller asks to attachstream a connect-wait
  32402. or resolve-wait stream.
  32403. - Now do address rewriting when the controller asks us to attach
  32404. to a particular circuit too. This will let Blossom specify
  32405. "moria2.exit" without having to learn what moria2's IP address is.
  32406. - Make the "tor --verify-config" command-line work again, so people
  32407. can automatically check if their torrc will parse.
  32408. - Authoritative dirservers no longer require an open connection from
  32409. a server to consider him "reachable". We need this change because
  32410. when we add new auth dirservers, old servers won't know not to
  32411. hang up on them.
  32412. - Let Tor build on Sun CC again.
  32413. - Fix an off-by-one buffer size in dirserv.c that magically never
  32414. hit our three authorities but broke sjmurdoch's own tor network.
  32415. - If we as a directory mirror don't know of any v1 directory
  32416. authorities, then don't try to cache any v1 directories.
  32417. - Stop warning about unknown servers in our family when they are
  32418. given as hex digests.
  32419. - Stop complaining as quickly to the server operator that he
  32420. hasn't registered his nickname/key binding.
  32421. - Various cleanups so we can add new V2 Auth Dirservers.
  32422. - Change "AllowUnverifiedNodes" to "AllowInvalidNodes", to
  32423. reflect the updated flags in our v2 dir protocol.
  32424. - Resume allowing non-printable characters for exit streams (both
  32425. for connecting and for resolving). Now we tolerate applications
  32426. that don't follow the RFCs. But continue to block malformed names
  32427. at the socks side.
  32428. o Bugfixes on 0.1.0.x:
  32429. - Fix assert bug in close_logs(): when we close and delete logs,
  32430. remove them all from the global "logfiles" list.
  32431. - Fix minor integer overflow in calculating when we expect to use up
  32432. our bandwidth allocation before hibernating.
  32433. - Fix a couple of bugs in OpenSSL detection. Also, deal better when
  32434. there are multiple SSLs installed with different versions.
  32435. - When we try to be a server and Address is not explicitly set and
  32436. our hostname resolves to a private IP address, try to use an
  32437. interface address if it has a public address. Now Windows machines
  32438. that think of themselves as localhost can work by default.
  32439. o New features:
  32440. - Let the controller ask for GETINFO dir/server/foo so it can ask
  32441. directly rather than connecting to the dir port.
  32442. - Let the controller tell us about certain router descriptors
  32443. that it doesn't want Tor to use in circuits. Implement
  32444. SETROUTERPURPOSE and modify +POSTDESCRIPTOR to do this.
  32445. - New config option SafeSocks to reject all application connections
  32446. using unsafe socks protocols. Defaults to off.
  32447. Changes in version 0.1.1.15-rc - 2006-03-11
  32448. o Bugfixes and cleanups:
  32449. - When we're printing strings from the network, don't try to print
  32450. non-printable characters. This protects us against shell escape
  32451. sequence exploits, and also against attacks to fool humans into
  32452. misreading their logs.
  32453. - Fix a bug where Tor would fail to establish any connections if you
  32454. left it off for 24 hours and then started it: we were happy with
  32455. the obsolete network statuses, but they all referred to router
  32456. descriptors that were too old to fetch, so we ended up with no
  32457. valid router descriptors.
  32458. - Fix a seg fault in the controller's "getinfo orconn-status"
  32459. command while listing status on incoming handshaking connections.
  32460. Introduce a status name "NEW" for these connections.
  32461. - If we get a linelist or linelist_s config option from the torrc
  32462. (e.g. ExitPolicy) and it has no value, warn and skip rather than
  32463. silently resetting it to its default.
  32464. - Don't abandon entry guards until they've been down or gone for
  32465. a whole month.
  32466. - Cleaner and quieter log messages.
  32467. o New features:
  32468. - New controller signal NEWNYM that makes new application requests
  32469. use clean circuits.
  32470. - Add a new circuit purpose 'controller' to let the controller ask
  32471. for a circuit that Tor won't try to use. Extend the EXTENDCIRCUIT
  32472. controller command to let you specify the purpose if you're
  32473. starting a new circuit. Add a new SETCIRCUITPURPOSE controller
  32474. command to let you change a circuit's purpose after it's been
  32475. created.
  32476. - Accept "private:*" in routerdesc exit policies; not generated yet
  32477. because older Tors do not understand it.
  32478. - Add BSD-style contributed startup script "rc.subr" from Peter
  32479. Thoenen.
  32480. Changes in version 0.1.1.14-alpha - 2006-02-20
  32481. o Bugfixes on 0.1.1.x:
  32482. - Don't die if we ask for a stdout or stderr log (even implicitly)
  32483. and we're set to RunAsDaemon -- just warn.
  32484. - We still had a few bugs in the OR connection rotation code that
  32485. caused directory servers to slowly aggregate connections to other
  32486. fast Tor servers. This time for sure!
  32487. - Make log entries on Win32 include the name of the function again.
  32488. - We were treating a pair of exit policies if they were equal even
  32489. if one said accept and the other said reject -- causing us to
  32490. not always publish a new descriptor since we thought nothing
  32491. had changed.
  32492. - Retry pending server downloads as well as pending networkstatus
  32493. downloads when we unexpectedly get a socks request.
  32494. - We were ignoring the IS_FAST flag in the directory status,
  32495. meaning we were willing to pick trivial-bandwidth nodes for "fast"
  32496. connections.
  32497. - If the controller's SAVECONF command fails (e.g. due to file
  32498. permissions), let the controller know that it failed.
  32499. o Features:
  32500. - If we're trying to be a Tor server and running Windows 95/98/ME
  32501. as a server, explain that we'll likely crash.
  32502. - When we're a server, a client asks for an old-style directory,
  32503. and our write bucket is empty, don't give it to him. This way
  32504. small servers can continue to serve the directory *sometimes*,
  32505. without getting overloaded.
  32506. - Compress exit policies even more -- look for duplicate lines
  32507. and remove them.
  32508. - Clients now honor the "guard" flag in the router status when
  32509. picking entry guards, rather than looking at is_fast or is_stable.
  32510. - Retain unrecognized lines in $DATADIR/state file, so that we can
  32511. be forward-compatible.
  32512. - Generate 18.0.0.0/8 address policy format in descs when we can;
  32513. warn when the mask is not reducible to a bit-prefix.
  32514. - Let the user set ControlListenAddress in the torrc. This can be
  32515. dangerous, but there are some cases (like a secured LAN) where it
  32516. makes sense.
  32517. - Split ReachableAddresses into ReachableDirAddresses and
  32518. ReachableORAddresses, so we can restrict Dir conns to port 80
  32519. and OR conns to port 443.
  32520. - Now we can target arch and OS in rpm builds (contributed by
  32521. Phobos). Also make the resulting dist-rpm filename match the
  32522. target arch.
  32523. - New config options to help controllers: FetchServerDescriptors
  32524. and FetchHidServDescriptors for whether to fetch server
  32525. info and hidserv info or let the controller do it, and
  32526. PublishServerDescriptor and PublishHidServDescriptors.
  32527. - Also let the controller set the __AllDirActionsPrivate config
  32528. option if you want all directory fetches/publishes to happen via
  32529. Tor (it assumes your controller bootstraps your circuits).
  32530. Changes in version 0.1.0.17 - 2006-02-17
  32531. o Crash bugfixes on 0.1.0.x:
  32532. - When servers with a non-zero DirPort came out of hibernation,
  32533. sometimes they would trigger an assert.
  32534. o Other important bugfixes:
  32535. - On platforms that don't have getrlimit (like Windows), we were
  32536. artificially constraining ourselves to a max of 1024
  32537. connections. Now just assume that we can handle as many as 15000
  32538. connections. Hopefully this won't cause other problems.
  32539. o Backported features:
  32540. - When we're a server, a client asks for an old-style directory,
  32541. and our write bucket is empty, don't give it to him. This way
  32542. small servers can continue to serve the directory *sometimes*,
  32543. without getting overloaded.
  32544. - Whenever you get a 503 in response to a directory fetch, try
  32545. once more. This will become important once servers start sending
  32546. 503's whenever they feel busy.
  32547. - Fetch a new directory every 120 minutes, not every 40 minutes.
  32548. Now that we have hundreds of thousands of users running the old
  32549. directory algorithm, it's starting to hurt a lot.
  32550. - Bump up the period for forcing a hidden service descriptor upload
  32551. from 20 minutes to 1 hour.
  32552. Changes in version 0.1.1.13-alpha - 2006-02-09
  32553. o Crashes in 0.1.1.x:
  32554. - When you tried to setconf ORPort via the controller, Tor would
  32555. crash. So people using TorCP to become a server were sad.
  32556. - Solve (I hope) the stack-smashing bug that we were seeing on fast
  32557. servers. The problem appears to be something do with OpenSSL's
  32558. random number generation, or how we call it, or something. Let me
  32559. know if the crashes continue.
  32560. - Turn crypto hardware acceleration off by default, until we find
  32561. somebody smart who can test it for us. (It appears to produce
  32562. seg faults in at least some cases.)
  32563. - Fix a rare assert error when we've tried all intro points for
  32564. a hidden service and we try fetching the service descriptor again:
  32565. "Assertion conn->state != AP_CONN_STATE_RENDDESC_WAIT failed"
  32566. o Major fixes:
  32567. - Fix a major load balance bug: we were round-robining in 16 KB
  32568. chunks, and servers with bandwidthrate of 20 KB, while downloading
  32569. a 600 KB directory, would starve their other connections. Now we
  32570. try to be a bit more fair.
  32571. - Dir authorities and mirrors were never expiring the newest
  32572. descriptor for each server, causing memory and directory bloat.
  32573. - Fix memory-bloating and connection-bloating bug on servers: We
  32574. were never closing any connection that had ever had a circuit on
  32575. it, because we were checking conn->n_circuits == 0, yet we had a
  32576. bug that let it go negative.
  32577. - Make Tor work using squid as your http proxy again -- squid
  32578. returns an error if you ask for a URL that's too long, and it uses
  32579. a really generic error message. Plus, many people are behind a
  32580. transparent squid so they don't even realize it.
  32581. - On platforms that don't have getrlimit (like Windows), we were
  32582. artificially constraining ourselves to a max of 1024
  32583. connections. Now just assume that we can handle as many as 15000
  32584. connections. Hopefully this won't cause other problems.
  32585. - Add a new config option ExitPolicyRejectPrivate which defaults to
  32586. 1. This means all exit policies will begin with rejecting private
  32587. addresses, unless the server operator explicitly turns it off.
  32588. o Major features:
  32589. - Clients no longer download descriptors for non-running
  32590. descriptors.
  32591. - Before we add new directory authorities, we should make it
  32592. clear that only v1 authorities should receive/publish hidden
  32593. service descriptors.
  32594. o Minor features:
  32595. - As soon as we've fetched some more directory info, immediately
  32596. try to download more server descriptors. This way we don't have
  32597. a 10 second pause during initial bootstrapping.
  32598. - Remove even more loud log messages that the server operator can't
  32599. do anything about.
  32600. - When we're running an obsolete or un-recommended version, make
  32601. the log message more clear about what the problem is and what
  32602. versions *are* still recommended.
  32603. - Provide a more useful warn message when our onion queue gets full:
  32604. the CPU is too slow or the exit policy is too liberal.
  32605. - Don't warn when we receive a 503 from a dirserver/cache -- this
  32606. will pave the way for them being able to refuse if they're busy.
  32607. - When we fail to bind a listener, try to provide a more useful
  32608. log message: e.g., "Is Tor already running?"
  32609. - Adjust tor-spec to parameterize cell and key lengths. Now Ian
  32610. Goldberg can prove things about our handshake protocol more
  32611. easily.
  32612. - MaxConn has been obsolete for a while now. Document the ConnLimit
  32613. config option, which is a *minimum* number of file descriptors
  32614. that must be available else Tor refuses to start.
  32615. - Apply Matt Ghali's --with-syslog-facility patch to ./configure
  32616. if you log to syslog and want something other than LOG_DAEMON.
  32617. - Make dirservers generate a separate "guard" flag to mean,
  32618. "would make a good entry guard". Make clients parse it and vote
  32619. on it. Not used by clients yet.
  32620. - Implement --with-libevent-dir option to ./configure. Also, improve
  32621. search techniques to find libevent, and use those for openssl too.
  32622. - Bump the default bandwidthrate to 3 MB, and burst to 6 MB
  32623. - Only start testing reachability once we've established a
  32624. circuit. This will make startup on dirservers less noisy.
  32625. - Don't try to upload hidden service descriptors until we have
  32626. established a circuit.
  32627. - Fix the controller's "attachstream 0" command to treat conn like
  32628. it just connected, doing address remapping, handling .exit and
  32629. .onion idioms, and so on. Now we're more uniform in making sure
  32630. that the controller hears about new and closing connections.
  32631. Changes in version 0.1.1.12-alpha - 2006-01-11
  32632. o Bugfixes on 0.1.1.x:
  32633. - The fix to close duplicate server connections was closing all
  32634. Tor client connections if they didn't establish a circuit
  32635. quickly enough. Oops.
  32636. - Fix minor memory issue (double-free) that happened on exit.
  32637. o Bugfixes on 0.1.0.x:
  32638. - Tor didn't warn when it failed to open a log file.
  32639. Changes in version 0.1.1.11-alpha - 2006-01-10
  32640. o Crashes in 0.1.1.x:
  32641. - Include all the assert/crash fixes from 0.1.0.16.
  32642. - If you start Tor and then quit very quickly, there were some
  32643. races that tried to free things that weren't allocated yet.
  32644. - Fix a rare memory stomp if you're running hidden services.
  32645. - Fix segfault when specifying DirServer in config without nickname.
  32646. - Fix a seg fault when you finish connecting to a server but at
  32647. that moment you dump his server descriptor.
  32648. - Extendcircuit and Attachstream controller commands would
  32649. assert/crash if you don't give them enough arguments.
  32650. - Fix an assert error when we're out of space in the connection_list
  32651. and we try to post a hidden service descriptor (reported by weasel).
  32652. - If you specify a relative torrc path and you set RunAsDaemon in
  32653. your torrc, then it chdir()'s to the new directory. If you HUP,
  32654. it tries to load the new torrc location, fails, and exits.
  32655. The fix: no longer allow a relative path to torrc using -f.
  32656. o Major features:
  32657. - Implement "entry guards": automatically choose a handful of entry
  32658. nodes and stick with them for all circuits. Only pick new guards
  32659. when the ones you have are unsuitable, and if the old guards
  32660. become suitable again, switch back. This will increase security
  32661. dramatically against certain end-point attacks. The EntryNodes
  32662. config option now provides some hints about which entry guards you
  32663. want to use most; and StrictEntryNodes means to only use those.
  32664. - New directory logic: download by descriptor digest, not by
  32665. fingerprint. Caches try to download all listed digests from
  32666. authorities; clients try to download "best" digests from caches.
  32667. This avoids partitioning and isolating attacks better.
  32668. - Make the "stable" router flag in network-status be the median of
  32669. the uptimes of running valid servers, and make clients pay
  32670. attention to the network-status flags. Thus the cutoff adapts
  32671. to the stability of the network as a whole, making IRC, IM, etc
  32672. connections more reliable.
  32673. o Major fixes:
  32674. - Tor servers with dynamic IP addresses were needing to wait 18
  32675. hours before they could start doing reachability testing using
  32676. the new IP address and ports. This is because they were using
  32677. the internal descriptor to learn what to test, yet they were only
  32678. rebuilding the descriptor once they decided they were reachable.
  32679. - Tor 0.1.1.9 and 0.1.1.10 had a serious bug that caused clients
  32680. to download certain server descriptors, throw them away, and then
  32681. fetch them again after 30 minutes. Now mirrors throw away these
  32682. server descriptors so clients can't get them.
  32683. - We were leaving duplicate connections to other ORs open for a week,
  32684. rather than closing them once we detect a duplicate. This only
  32685. really affected authdirservers, but it affected them a lot.
  32686. - Spread the authdirservers' reachability testing over the entire
  32687. testing interval, so we don't try to do 500 TLS's at once every
  32688. 20 minutes.
  32689. o Minor fixes:
  32690. - If the network is down, and we try to connect to a conn because
  32691. we have a circuit in mind, and we timeout (30 seconds) because the
  32692. network never answers, we were expiring the circuit, but we weren't
  32693. obsoleting the connection or telling the entry_guards functions.
  32694. - Some Tor servers process billions of cells per day. These statistics
  32695. need to be uint64_t's.
  32696. - Check for integer overflows in more places, when adding elements
  32697. to smartlists. This could possibly prevent a buffer overflow
  32698. on malicious huge inputs. I don't see any, but I haven't looked
  32699. carefully.
  32700. - ReachableAddresses kept growing new "reject *:*" lines on every
  32701. setconf/reload.
  32702. - When you "setconf log" via the controller, it should remove all
  32703. logs. We were automatically adding back in a "log notice stdout".
  32704. - Newly bootstrapped Tor networks couldn't establish hidden service
  32705. circuits until they had nodes with high uptime. Be more tolerant.
  32706. - We were marking servers down when they could not answer every piece
  32707. of the directory request we sent them. This was far too harsh.
  32708. - Fix the torify (tsocks) config file to not use Tor for localhost
  32709. connections.
  32710. - Directory authorities now go to the proper authority when asking for
  32711. a networkstatus, even when they want a compressed one.
  32712. - Fix a harmless bug that was causing Tor servers to log
  32713. "Got an end because of misc error, but we're not an AP. Closing."
  32714. - Authorities were treating their own descriptor changes as cosmetic,
  32715. meaning the descriptor available in the network-status and the
  32716. descriptor that clients downloaded were different.
  32717. - The OS X installer was adding a symlink for tor_resolve but
  32718. the binary was called tor-resolve (reported by Thomas Hardly).
  32719. - Workaround a problem with some http proxies where they refuse GET
  32720. requests that specify "Content-Length: 0" (reported by Adrian).
  32721. - Fix wrong log message when you add a "HiddenServiceNodes" config
  32722. line without any HiddenServiceDir line (reported by Chris Thomas).
  32723. o Minor features:
  32724. - Write the TorVersion into the state file so we have a prayer of
  32725. keeping forward and backward compatibility.
  32726. - Revive the FascistFirewall config option rather than eliminating it:
  32727. now it's a synonym for ReachableAddresses *:80,*:443.
  32728. - Clients choose directory servers from the network status lists,
  32729. not from their internal list of router descriptors. Now they can
  32730. go to caches directly rather than needing to go to authorities
  32731. to bootstrap.
  32732. - Directory authorities ignore router descriptors that have only
  32733. cosmetic differences: do this for 0.1.0.x servers now too.
  32734. - Add a new flag to network-status indicating whether the server
  32735. can answer v2 directory requests too.
  32736. - Authdirs now stop whining so loudly about bad descriptors that
  32737. they fetch from other dirservers. So when there's a log complaint,
  32738. it's for sure from a freshly uploaded descriptor.
  32739. - Reduce memory requirements in our structs by changing the order
  32740. of fields.
  32741. - There used to be two ways to specify your listening ports in a
  32742. server descriptor: on the "router" line and with a separate "ports"
  32743. line. Remove support for the "ports" line.
  32744. - New config option "AuthDirRejectUnlisted" for auth dirservers as
  32745. a panic button: if we get flooded with unusable servers we can
  32746. revert to only listing servers in the approved-routers file.
  32747. - Auth dir servers can now mark a fingerprint as "!reject" or
  32748. "!invalid" in the approved-routers file (as its nickname), to
  32749. refuse descriptors outright or include them but marked as invalid.
  32750. - Servers store bandwidth history across restarts/crashes.
  32751. - Add reasons to DESTROY and RELAY_TRUNCATED cells, so clients can
  32752. get a better idea of why their circuits failed. Not used yet.
  32753. - Directory mirrors now cache up to 16 unrecognized network-status
  32754. docs. Now we can add new authdirservers and they'll be cached too.
  32755. - When picking a random directory, prefer non-authorities if any
  32756. are known.
  32757. - New controller option "getinfo desc/all-recent" to fetch the
  32758. latest server descriptor for every router that Tor knows about.
  32759. Changes in version 0.1.0.16 - 2006-01-02
  32760. o Crash bugfixes on 0.1.0.x:
  32761. - On Windows, build with a libevent patch from "I-M Weasel" to avoid
  32762. corrupting the heap, losing FDs, or crashing when we need to resize
  32763. the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
  32764. - It turns out sparc64 platforms crash on unaligned memory access
  32765. too -- so detect and avoid this.
  32766. - Handle truncated compressed data correctly (by detecting it and
  32767. giving an error).
  32768. - Fix possible-but-unlikely free(NULL) in control.c.
  32769. - When we were closing connections, there was a rare case that
  32770. stomped on memory, triggering seg faults and asserts.
  32771. - Avoid potential infinite recursion when building a descriptor. (We
  32772. don't know that it ever happened, but better to fix it anyway.)
  32773. - We were neglecting to unlink marked circuits from soon-to-close OR
  32774. connections, which caused some rare scribbling on freed memory.
  32775. - Fix a memory stomping race bug when closing the joining point of two
  32776. rendezvous circuits.
  32777. - Fix an assert in time parsing found by Steven Murdoch.
  32778. o Other bugfixes on 0.1.0.x:
  32779. - When we're doing reachability testing, provide more useful log
  32780. messages so the operator knows what to expect.
  32781. - Do not check whether DirPort is reachable when we are suppressing
  32782. advertising it because of hibernation.
  32783. - When building with -static or on Solaris, we sometimes needed -ldl.
  32784. - When we're deciding whether a stream has enough circuits around
  32785. that can handle it, count the freshly dirty ones and not the ones
  32786. that are so dirty they won't be able to handle it.
  32787. - When we're expiring old circuits, we had a logic error that caused
  32788. us to close new rendezvous circuits rather than old ones.
  32789. - Give a more helpful log message when you try to change ORPort via
  32790. the controller: you should upgrade Tor if you want that to work.
  32791. - We were failing to parse Tor versions that start with "Tor ".
  32792. - Tolerate faulty streams better: when a stream fails for reason
  32793. exitpolicy, stop assuming that the router is lying about his exit
  32794. policy. When a stream fails for reason misc, allow it to retry just
  32795. as if it was resolvefailed. When a stream has failed three times,
  32796. reset its failure count so we can try again and get all three tries.
  32797. Changes in version 0.1.1.10-alpha - 2005-12-11
  32798. o Correctness bugfixes on 0.1.0.x:
  32799. - On Windows, build with a libevent patch from "I-M Weasel" to avoid
  32800. corrupting the heap, losing FDs, or crashing when we need to resize
  32801. the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
  32802. - Stop doing the complex voodoo overkill checking for insecure
  32803. Diffie-Hellman keys. Just check if it's in [2,p-2] and be happy.
  32804. - When we were closing connections, there was a rare case that
  32805. stomped on memory, triggering seg faults and asserts.
  32806. - We were neglecting to unlink marked circuits from soon-to-close OR
  32807. connections, which caused some rare scribbling on freed memory.
  32808. - When we're deciding whether a stream has enough circuits around
  32809. that can handle it, count the freshly dirty ones and not the ones
  32810. that are so dirty they won't be able to handle it.
  32811. - Recover better from TCP connections to Tor servers that are
  32812. broken but don't tell you (it happens!); and rotate TLS
  32813. connections once a week.
  32814. - When we're expiring old circuits, we had a logic error that caused
  32815. us to close new rendezvous circuits rather than old ones.
  32816. - Fix a scary-looking but apparently harmless bug where circuits
  32817. would sometimes start out in state CIRCUIT_STATE_OR_WAIT at
  32818. servers, and never switch to state CIRCUIT_STATE_OPEN.
  32819. - When building with -static or on Solaris, we sometimes needed to
  32820. build with -ldl.
  32821. - Give a useful message when people run Tor as the wrong user,
  32822. rather than telling them to start chowning random directories.
  32823. - We were failing to inform the controller about new .onion streams.
  32824. o Security bugfixes on 0.1.0.x:
  32825. - Refuse server descriptors if the fingerprint line doesn't match
  32826. the included identity key. Tor doesn't care, but other apps (and
  32827. humans) might actually be trusting the fingerprint line.
  32828. - We used to kill the circuit when we receive a relay command we
  32829. don't recognize. Now we just drop it.
  32830. - Start obeying our firewall options more rigorously:
  32831. . If we can't get to a dirserver directly, try going via Tor.
  32832. . Don't ever try to connect (as a client) to a place our
  32833. firewall options forbid.
  32834. . If we specify a proxy and also firewall options, obey the
  32835. firewall options even when we're using the proxy: some proxies
  32836. can only proxy to certain destinations.
  32837. - Fix a bug found by Lasse Overlier: when we were making internal
  32838. circuits (intended to be cannibalized later for rendezvous and
  32839. introduction circuits), we were picking them so that they had
  32840. useful exit nodes. There was no need for this, and it actually
  32841. aids some statistical attacks.
  32842. - Start treating internal circuits and exit circuits separately.
  32843. It's important to keep them separate because internal circuits
  32844. have their last hops picked like middle hops, rather than like
  32845. exit hops. So exiting on them will break the user's expectations.
  32846. o Bugfixes on 0.1.1.x:
  32847. - Take out the mis-feature where we tried to detect IP address
  32848. flapping for people with DynDNS, and chose not to upload a new
  32849. server descriptor sometimes.
  32850. - Try to be compatible with OpenSSL 0.9.6 again.
  32851. - Log fix: when the controller is logging about .onion addresses,
  32852. sometimes it didn't include the ".onion" part of the address.
  32853. - Don't try to modify options->DirServers internally -- if the
  32854. user didn't specify any, just add the default ones directly to
  32855. the trusted dirserver list. This fixes a bug where people running
  32856. controllers would use SETCONF on some totally unrelated config
  32857. option, and Tor would start yelling at them about changing their
  32858. DirServer lines.
  32859. - Let the controller's redirectstream command specify a port, in
  32860. case the controller wants to change that too.
  32861. - When we requested a pile of server descriptors, we sometimes
  32862. accidentally launched a duplicate request for the first one.
  32863. - Bugfix for trackhostexits: write down the fingerprint of the
  32864. chosen exit, not its nickname, because the chosen exit might not
  32865. be verified.
  32866. - When parsing foo.exit, if foo is unknown, and we are leaving
  32867. circuits unattached, set the chosen_exit field and leave the
  32868. address empty. This matters because controllers got confused
  32869. otherwise.
  32870. - Directory authorities no longer try to download server
  32871. descriptors that they know they will reject.
  32872. o Features and updates:
  32873. - Replace balanced trees with hash tables: this should make stuff
  32874. significantly faster.
  32875. - Resume using the AES counter-mode implementation that we ship,
  32876. rather than OpenSSL's. Ours is significantly faster.
  32877. - Many other CPU and memory improvements.
  32878. - Add a new config option FastFirstHopPK (on by default) so clients
  32879. do a trivial crypto handshake for their first hop, since TLS has
  32880. already taken care of confidentiality and authentication.
  32881. - Add a new config option TestSocks so people can see if their
  32882. applications are using socks4, socks4a, socks5-with-ip, or
  32883. socks5-with-hostname. This way they don't have to keep mucking
  32884. with tcpdump and wondering if something got cached somewhere.
  32885. - Warn when listening on a public address for socks. I suspect a
  32886. lot of people are setting themselves up as open socks proxies,
  32887. and they have no idea that jerks on the Internet are using them,
  32888. since they simply proxy the traffic into the Tor network.
  32889. - Add "private:*" as an alias in configuration for policies. Now
  32890. you can simplify your exit policy rather than needing to list
  32891. every single internal or nonroutable network space.
  32892. - Add a new controller event type that allows controllers to get
  32893. all server descriptors that were uploaded to a router in its role
  32894. as authoritative dirserver.
  32895. - Start shipping socks-extensions.txt, tor-doc-unix.html,
  32896. tor-doc-server.html, and stylesheet.css in the tarball.
  32897. - Stop shipping tor-doc.html in the tarball.
  32898. Changes in version 0.1.1.9-alpha - 2005-11-15
  32899. o Usability improvements:
  32900. - Start calling it FooListenAddress rather than FooBindAddress,
  32901. since few of our users know what it means to bind an address
  32902. or port.
  32903. - Reduce clutter in server logs. We're going to try to make
  32904. them actually usable now. New config option ProtocolWarnings that
  32905. lets you hear about how _other Tors_ are breaking the protocol. Off
  32906. by default.
  32907. - Divide log messages into logging domains. Once we put some sort
  32908. of interface on this, it will let people looking at more verbose
  32909. log levels specify the topics they want to hear more about.
  32910. - Make directory servers return better http 404 error messages
  32911. instead of a generic "Servers unavailable".
  32912. - Check for even more Windows version flags when writing the platform
  32913. string in server descriptors, and note any we don't recognize.
  32914. - Clean up more of the OpenSSL memory when exiting, so we can detect
  32915. memory leaks better.
  32916. - Make directory authorities be non-versioning, non-naming by
  32917. default. Now we can add new directory servers without requiring
  32918. their operators to pay close attention.
  32919. - When logging via syslog, include the pid whenever we provide
  32920. a log entry. Suggested by Todd Fries.
  32921. o Performance improvements:
  32922. - Directory servers now silently throw away new descriptors that
  32923. haven't changed much if the timestamps are similar. We do this to
  32924. tolerate older Tor servers that upload a new descriptor every 15
  32925. minutes. (It seemed like a good idea at the time.)
  32926. - Inline bottleneck smartlist functions; use fast versions by default.
  32927. - Add a "Map from digest to void*" abstraction digestmap_t so we
  32928. can do less hex encoding/decoding. Use it in router_get_by_digest()
  32929. to resolve a performance bottleneck.
  32930. - Allow tor_gzip_uncompress to extract as much as possible from
  32931. truncated compressed data. Try to extract as many
  32932. descriptors as possible from truncated http responses (when
  32933. DIR_PURPOSE_FETCH_ROUTERDESC).
  32934. - Make circ->onionskin a pointer, not a static array. moria2 was using
  32935. 125000 circuit_t's after it had been up for a few weeks, which
  32936. translates to 20+ megs of wasted space.
  32937. - The private half of our EDH handshake keys are now chosen out
  32938. of 320 bits, not 1024 bits. (Suggested by Ian Goldberg.)
  32939. o Security improvements:
  32940. - Start making directory caches retain old routerinfos, so soon
  32941. clients can start asking by digest of descriptor rather than by
  32942. fingerprint of server.
  32943. - Add half our entropy from RAND_poll in OpenSSL. This knows how
  32944. to use egd (if present), openbsd weirdness (if present), vms/os2
  32945. weirdness (if we ever port there), and more in the future.
  32946. o Bugfixes on 0.1.0.x:
  32947. - Do round-robin writes of at most 16 kB per write. This might be
  32948. more fair on loaded Tor servers, and it might resolve our Windows
  32949. crash bug. It might also slow things down.
  32950. - Our TLS handshakes were generating a single public/private
  32951. keypair for the TLS context, rather than making a new one for
  32952. each new connections. Oops. (But we were still rotating them
  32953. periodically, so it's not so bad.)
  32954. - When we were cannibalizing a circuit with a particular exit
  32955. node in mind, we weren't checking to see if that exit node was
  32956. already present earlier in the circuit. Oops.
  32957. - When a Tor server's IP changes (e.g. from a dyndns address),
  32958. upload a new descriptor so clients will learn too.
  32959. - Really busy servers were keeping enough circuits open on stable
  32960. connections that they were wrapping around the circuit_id
  32961. space. (It's only two bytes.) This exposed a bug where we would
  32962. feel free to reuse a circuit_id even if it still exists but has
  32963. been marked for close. Try to fix this bug. Some bug remains.
  32964. - If we would close a stream early (e.g. it asks for a .exit that
  32965. we know would refuse it) but the LeaveStreamsUnattached config
  32966. option is set by the controller, then don't close it.
  32967. o Bugfixes on 0.1.1.8-alpha:
  32968. - Fix a big pile of memory leaks, some of them serious.
  32969. - Do not try to download a routerdesc if we would immediately reject
  32970. it as obsolete.
  32971. - Resume inserting a newline between all router descriptors when
  32972. generating (old style) signed directories, since our spec says
  32973. we do.
  32974. - When providing content-type application/octet-stream for
  32975. server descriptors using .z, we were leaving out the
  32976. content-encoding header. Oops. (Everything tolerated this just
  32977. fine, but that doesn't mean we need to be part of the problem.)
  32978. - Fix a potential seg fault in getconf and getinfo using version 1
  32979. of the controller protocol.
  32980. - Avoid crash: do not check whether DirPort is reachable when we
  32981. are suppressing it because of hibernation.
  32982. - Make --hash-password not crash on exit.
  32983. Changes in version 0.1.1.8-alpha - 2005-10-07
  32984. o New features (major):
  32985. - Clients don't download or use the directory anymore. Now they
  32986. download and use network-statuses from the trusted dirservers,
  32987. and fetch individual server descriptors as needed from mirrors.
  32988. See dir-spec.txt for all the gory details.
  32989. - Be more conservative about whether to advertise our DirPort.
  32990. The main change is to not advertise if we're running at capacity
  32991. and either a) we could hibernate or b) our capacity is low and
  32992. we're using a default DirPort.
  32993. - Use OpenSSL's AES when OpenSSL has version 0.9.7 or later.
  32994. o New features (minor):
  32995. - Try to be smart about when to retry network-status and
  32996. server-descriptor fetches. Still needs some tuning.
  32997. - Stop parsing, storing, or using running-routers output (but
  32998. mirrors still cache and serve it).
  32999. - Consider a threshold of versioning dirservers (dirservers who have
  33000. an opinion about which Tor versions are still recommended) before
  33001. deciding whether to warn the user that he's obsolete.
  33002. - Dirservers can now reject/invalidate by key and IP, with the
  33003. config options "AuthDirInvalid" and "AuthDirReject". This is
  33004. useful since currently we automatically list servers as running
  33005. and usable even if we know they're jerks.
  33006. - Provide dire warnings to any users who set DirServer; move it out
  33007. of torrc.sample and into torrc.complete.
  33008. - Add MyFamily to torrc.sample in the server section.
  33009. - Add nicknames to the DirServer line, so we can refer to them
  33010. without requiring all our users to memorize their IP addresses.
  33011. - When we get an EOF or a timeout on a directory connection, note
  33012. how many bytes of serverdesc we are dropping. This will help
  33013. us determine whether it is smart to parse incomplete serverdesc
  33014. responses.
  33015. - Add a new function to "change pseudonyms" -- that is, to stop
  33016. using any currently-dirty circuits for new streams, so we don't
  33017. link new actions to old actions. Currently it's only called on
  33018. HUP (or SIGNAL RELOAD).
  33019. - On sighup, if UseHelperNodes changed to 1, use new circuits.
  33020. - Start using RAND_bytes rather than RAND_pseudo_bytes from
  33021. OpenSSL. Also, reseed our entropy every hour, not just at
  33022. startup. And entropy in 512-bit chunks, not 160-bit chunks.
  33023. o Fixes on 0.1.1.7-alpha:
  33024. - Nobody ever implemented EVENT_ADDRMAP for control protocol
  33025. version 0, so don't let version 0 controllers ask for it.
  33026. - If you requested something with too many newlines via the
  33027. v1 controller protocol, you could crash tor.
  33028. - Fix a number of memory leaks, including some pretty serious ones.
  33029. - Re-enable DirPort testing again, so Tor servers will be willing
  33030. to advertise their DirPort if it's reachable.
  33031. - On TLS handshake, only check the other router's nickname against
  33032. its expected nickname if is_named is set.
  33033. o Fixes forward-ported from 0.1.0.15:
  33034. - Don't crash when we don't have any spare file descriptors and we
  33035. try to spawn a dns or cpu worker.
  33036. - Make the numbers in read-history and write-history into uint64s,
  33037. so they don't overflow and publish negatives in the descriptor.
  33038. o Fixes on 0.1.0.x:
  33039. - For the OS X package's modified privoxy config file, comment
  33040. out the "logfile" line so we don't log everything passed
  33041. through privoxy.
  33042. - We were whining about using socks4 or socks5-with-local-lookup
  33043. even when it's an IP in the "virtual" range we designed exactly
  33044. for this case.
  33045. - We were leaking some memory every time the client changes IPs.
  33046. - Never call free() on tor_malloc()d memory. This will help us
  33047. use dmalloc to detect memory leaks.
  33048. - Check for named servers when looking them up by nickname;
  33049. warn when we'recalling a non-named server by its nickname;
  33050. don't warn twice about the same name.
  33051. - Try to list MyFamily elements by key, not by nickname, and warn
  33052. if we've not heard of the server.
  33053. - Make windows platform detection (uname equivalent) smarter.
  33054. - It turns out sparc64 doesn't like unaligned access either.
  33055. Changes in version 0.1.0.15 - 2005-09-23
  33056. o Bugfixes on 0.1.0.x:
  33057. - Reject ports 465 and 587 (spam targets) in default exit policy.
  33058. - Don't crash when we don't have any spare file descriptors and we
  33059. try to spawn a dns or cpu worker.
  33060. - Get rid of IgnoreVersion undocumented config option, and make us
  33061. only warn, never exit, when we're running an obsolete version.
  33062. - Don't try to print a null string when your server finds itself to
  33063. be unreachable and the Address config option is empty.
  33064. - Make the numbers in read-history and write-history into uint64s,
  33065. so they don't overflow and publish negatives in the descriptor.
  33066. - Fix a minor memory leak in smartlist_string_remove().
  33067. - We were only allowing ourselves to upload a server descriptor at
  33068. most every 20 minutes, even if it changed earlier than that.
  33069. - Clean up log entries that pointed to old URLs.
  33070. Changes in version 0.1.1.7-alpha - 2005-09-14
  33071. o Fixes on 0.1.1.6-alpha:
  33072. - Exit servers were crashing when people asked them to make a
  33073. connection to an address not in their exit policy.
  33074. - Looking up a non-existent stream for a v1 control connection would
  33075. cause a segfault.
  33076. - Fix a seg fault if we ask a dirserver for a descriptor by
  33077. fingerprint but he doesn't know about him.
  33078. - SETCONF was appending items to linelists, not clearing them.
  33079. - SETCONF SocksBindAddress killed Tor if it fails to bind. Now back
  33080. out and refuse the setconf if it would fail.
  33081. - Downgrade the dirserver log messages when whining about
  33082. unreachability.
  33083. o New features:
  33084. - Add Peter Palfrader's check-tor script to tor/contrib/
  33085. It lets you easily check whether a given server (referenced by
  33086. nickname) is reachable by you.
  33087. - Numerous changes to move towards client-side v2 directories. Not
  33088. enabled yet.
  33089. o Fixes on 0.1.0.x:
  33090. - If the user gave tor an odd number of command-line arguments,
  33091. we were silently ignoring the last one. Now we complain and fail.
  33092. [This wins the oldest-bug prize -- this bug has been present since
  33093. November 2002, as released in Tor 0.0.0.]
  33094. - Do not use unaligned memory access on alpha, mips, or mipsel.
  33095. It *works*, but is very slow, so we treat them as if it doesn't.
  33096. - Retry directory requests if we fail to get an answer we like
  33097. from a given dirserver (we were retrying before, but only if
  33098. we fail to connect).
  33099. - When writing the RecommendedVersions line, sort them first.
  33100. - When the client asked for a rendezvous port that the hidden
  33101. service didn't want to provide, we were sending an IP address
  33102. back along with the end cell. Fortunately, it was zero. But stop
  33103. that anyway.
  33104. - Correct "your server is reachable" log entries to indicate that
  33105. it was self-testing that told us so.
  33106. Changes in version 0.1.1.6-alpha - 2005-09-09
  33107. o Fixes on 0.1.1.5-alpha:
  33108. - We broke fascistfirewall in 0.1.1.5-alpha. Oops.
  33109. - Fix segfault in unit tests in 0.1.1.5-alpha. Oops.
  33110. - Fix bug with tor_memmem finding a match at the end of the string.
  33111. - Make unit tests run without segfaulting.
  33112. - Resolve some solaris x86 compile warnings.
  33113. - Handle duplicate lines in approved-routers files without warning.
  33114. - Fix bug where as soon as a server refused any requests due to his
  33115. exit policy (e.g. when we ask for localhost and he tells us that's
  33116. 127.0.0.1 and he won't do it), we decided he wasn't obeying his
  33117. exit policy using him for any exits.
  33118. - Only do openssl hardware accelerator stuff if openssl version is
  33119. at least 0.9.7.
  33120. o New controller features/fixes:
  33121. - Add a "RESETCONF" command so you can set config options like
  33122. AllowUnverifiedNodes and LongLivedPorts to "". Also, if you give
  33123. a config option in the torrc with no value, then it clears it
  33124. entirely (rather than setting it to its default).
  33125. - Add a "GETINFO config-file" to tell us where torrc is.
  33126. - Avoid sending blank lines when GETINFO replies should be empty.
  33127. - Add a QUIT command for the controller (for using it manually).
  33128. - Fix a bug in SAVECONF that was adding default dirservers and
  33129. other redundant entries to the torrc file.
  33130. o Start on the new directory design:
  33131. - Generate, publish, cache, serve new network-status format.
  33132. - Publish individual descriptors (by fingerprint, by "all", and by
  33133. "tell me yours").
  33134. - Publish client and server recommended versions separately.
  33135. - Allow tor_gzip_uncompress() to handle multiple concatenated
  33136. compressed strings. Serve compressed groups of router
  33137. descriptors. The compression logic here could be more
  33138. memory-efficient.
  33139. - Distinguish v1 authorities (all currently trusted directories)
  33140. from v2 authorities (all trusted directories).
  33141. - Change DirServers config line to note which dirs are v1 authorities.
  33142. - Add configuration option "V1AuthoritativeDirectory 1" which
  33143. moria1, moria2, and tor26 should set.
  33144. - Remove option when getting directory cache to see whether they
  33145. support running-routers; they all do now. Replace it with one
  33146. to see whether caches support v2 stuff.
  33147. o New features:
  33148. - Dirservers now do their own external reachability testing of each
  33149. Tor server, and only list them as running if they've been found to
  33150. be reachable. We also send back warnings to the server's logs if
  33151. it uploads a descriptor that we already believe is unreachable.
  33152. - Implement exit enclaves: if we know an IP address for the
  33153. destination, and there's a running Tor server at that address
  33154. which allows exit to the destination, then extend the circuit to
  33155. that exit first. This provides end-to-end encryption and end-to-end
  33156. authentication. Also, if the user wants a .exit address or enclave,
  33157. use 4 hops rather than 3, and cannibalize a general circ for it
  33158. if you can.
  33159. - Permit transitioning from ORPort=0 to ORPort!=0, and back, from the
  33160. controller. Also, rotate dns and cpu workers if the controller
  33161. changes options that will affect them; and initialize the dns
  33162. worker cache tree whether or not we start out as a server.
  33163. - Only upload a new server descriptor when options change, 18
  33164. hours have passed, uptime is reset, or bandwidth changes a lot.
  33165. - Check [X-]Forwarded-For headers in HTTP requests when generating
  33166. log messages. This lets people run dirservers (and caches) behind
  33167. Apache but still know which IP addresses are causing warnings.
  33168. o Config option changes:
  33169. - Replace (Fascist)Firewall* config options with a new
  33170. ReachableAddresses option that understands address policies.
  33171. For example, "ReachableAddresses *:80,*:443"
  33172. - Get rid of IgnoreVersion undocumented config option, and make us
  33173. only warn, never exit, when we're running an obsolete version.
  33174. - Make MonthlyAccountingStart config option truly obsolete now.
  33175. o Fixes on 0.1.0.x:
  33176. - Reject ports 465 and 587 in the default exit policy, since
  33177. people have started using them for spam too.
  33178. - It turns out we couldn't bootstrap a network since we added
  33179. reachability detection in 0.1.0.1-rc. Good thing the Tor network
  33180. has never gone down. Add an AssumeReachable config option to let
  33181. servers and dirservers bootstrap. When we're trying to build a
  33182. high-uptime or high-bandwidth circuit but there aren't enough
  33183. suitable servers, try being less picky rather than simply failing.
  33184. - Our logic to decide if the OR we connected to was the right guy
  33185. was brittle and maybe open to a mitm for unverified routers.
  33186. - We weren't cannibalizing circuits correctly for
  33187. CIRCUIT_PURPOSE_C_ESTABLISH_REND and
  33188. CIRCUIT_PURPOSE_S_ESTABLISH_INTRO, so we were being forced to
  33189. build those from scratch. This should make hidden services faster.
  33190. - Predict required circuits better, with an eye toward making hidden
  33191. services faster on the service end.
  33192. - Retry streams if the exit node sends back a 'misc' failure. This
  33193. should result in fewer random failures. Also, after failing
  33194. from resolve failed or misc, reset the num failures, so we give
  33195. it a fair shake next time we try.
  33196. - Clean up the rendezvous warn log msgs, and downgrade some to info.
  33197. - Reduce severity on logs about dns worker spawning and culling.
  33198. - When we're shutting down and we do something like try to post a
  33199. server descriptor or rendezvous descriptor, don't complain that
  33200. we seem to be unreachable. Of course we are, we're shutting down.
  33201. - Add TTLs to RESOLVED, CONNECTED, and END_REASON_EXITPOLICY cells.
  33202. We don't use them yet, but maybe one day our DNS resolver will be
  33203. able to discover them.
  33204. - Make ContactInfo mandatory for authoritative directory servers.
  33205. - Require server descriptors to list IPv4 addresses -- hostnames
  33206. are no longer allowed. This also fixes some potential security
  33207. problems with people providing hostnames as their address and then
  33208. preferentially resolving them to partition users.
  33209. - Change log line for unreachability to explicitly suggest /etc/hosts
  33210. as the culprit. Also make it clearer what IP address and ports we're
  33211. testing for reachability.
  33212. - Put quotes around user-supplied strings when logging so users are
  33213. more likely to realize if they add bad characters (like quotes)
  33214. to the torrc.
  33215. - Let auth dir servers start without specifying an Address config
  33216. option.
  33217. - Make unit tests (and other invocations that aren't the real Tor)
  33218. run without launching listeners, creating subdirectories, and so on.
  33219. Changes in version 0.1.1.5-alpha - 2005-08-08
  33220. o Bugfixes included in 0.1.0.14.
  33221. o Bugfixes on 0.1.0.x:
  33222. - If you write "HiddenServicePort 6667 127.0.0.1 6668" in your
  33223. torrc rather than "HiddenServicePort 6667 127.0.0.1:6668",
  33224. it would silently using ignore the 6668.
  33225. Changes in version 0.1.0.14 - 2005-08-08
  33226. o Bugfixes on 0.1.0.x:
  33227. - Fix the other half of the bug with crypto handshakes
  33228. (CVE-2005-2643).
  33229. - Fix an assert trigger if you send a 'signal term' via the
  33230. controller when it's listening for 'event info' messages.
  33231. Changes in version 0.1.1.4-alpha - 2005-08-04
  33232. o Bugfixes included in 0.1.0.13.
  33233. o Features:
  33234. - Improve tor_gettimeofday() granularity on windows.
  33235. - Make clients regenerate their keys when their IP address changes.
  33236. - Implement some more GETINFO goodness: expose helper nodes, config
  33237. options, getinfo keys.
  33238. Changes in version 0.1.0.13 - 2005-08-04
  33239. o Bugfixes on 0.1.0.x:
  33240. - Fix a critical bug in the security of our crypto handshakes.
  33241. - Fix a size_t underflow in smartlist_join_strings2() that made
  33242. it do bad things when you hand it an empty smartlist.
  33243. - Fix Windows installer to ship Tor license (thanks to Aphex for
  33244. pointing out this oversight) and put a link to the doc directory
  33245. in the start menu.
  33246. - Explicitly set no-unaligned-access for sparc: it turns out the
  33247. new gcc's let you compile broken code, but that doesn't make it
  33248. not-broken.
  33249. Changes in version 0.1.1.3-alpha - 2005-07-23
  33250. o Bugfixes on 0.1.1.2-alpha:
  33251. - Fix a bug in handling the controller's "post descriptor"
  33252. function.
  33253. - Fix several bugs in handling the controller's "extend circuit"
  33254. function.
  33255. - Fix a bug in handling the controller's "stream status" event.
  33256. - Fix an assert failure if we have a controller listening for
  33257. circuit events and we go offline.
  33258. - Re-allow hidden service descriptors to publish 0 intro points.
  33259. - Fix a crash when generating your hidden service descriptor if
  33260. you don't have enough intro points already.
  33261. o New features on 0.1.1.2-alpha:
  33262. - New controller function "getinfo accounting", to ask how
  33263. many bytes we've used in this time period.
  33264. - Experimental support for helper nodes: a lot of the risk from
  33265. a small static adversary comes because users pick new random
  33266. nodes every time they rebuild a circuit. Now users will try to
  33267. stick to the same small set of entry nodes if they can. Not
  33268. enabled by default yet.
  33269. o Bugfixes on 0.1.0.12:
  33270. - If you're an auth dir server, always publish your dirport,
  33271. even if you haven't yet found yourself to be reachable.
  33272. - Fix a size_t underflow in smartlist_join_strings2() that made
  33273. it do bad things when you hand it an empty smartlist.
  33274. Changes in version 0.1.0.12 - 2005-07-18
  33275. o New directory servers:
  33276. - tor26 has changed IP address.
  33277. o Bugfixes on 0.1.0.x:
  33278. - Fix a possible double-free in tor_gzip_uncompress().
  33279. - When --disable-threads is set, do not search for or link against
  33280. pthreads libraries.
  33281. - Don't trigger an assert if an authoritative directory server
  33282. claims its dirport is 0.
  33283. - Fix bug with removing Tor as an NT service: some people were
  33284. getting "The service did not return an error." Thanks to Matt
  33285. Edman for the fix.
  33286. Changes in version 0.1.1.2-alpha - 2005-07-15
  33287. o New directory servers:
  33288. - tor26 has changed IP address.
  33289. o Bugfixes on 0.1.0.x, crashes/leaks:
  33290. - Port the servers-not-obeying-their-exit-policies fix from
  33291. 0.1.0.11.
  33292. - Fix an fd leak in start_daemon().
  33293. - On Windows, you can't always reopen a port right after you've
  33294. closed it. So change retry_listeners() to only close and re-open
  33295. ports that have changed.
  33296. - Fix a possible double-free in tor_gzip_uncompress().
  33297. o Bugfixes on 0.1.0.x, usability:
  33298. - When tor_socketpair() fails in Windows, give a reasonable
  33299. Windows-style errno back.
  33300. - Let people type "tor --install" as well as "tor -install" when
  33301. they
  33302. want to make it an NT service.
  33303. - NT service patch from Matt Edman to improve error messages.
  33304. - When the controller asks for a config option with an abbreviated
  33305. name, give the full name in our response.
  33306. - Correct the man page entry on TrackHostExitsExpire.
  33307. - Looks like we were never delivering deflated (i.e. compressed)
  33308. running-routers lists, even when asked. Oops.
  33309. - When --disable-threads is set, do not search for or link against
  33310. pthreads libraries.
  33311. o Bugfixes on 0.1.1.x:
  33312. - Fix a seg fault with autodetecting which controller version is
  33313. being used.
  33314. o Features:
  33315. - New hidden service descriptor format: put a version in it, and
  33316. let people specify introduction/rendezvous points that aren't
  33317. in "the directory" (which is subjective anyway).
  33318. - Allow the DEBUG controller event to work again. Mark certain log
  33319. entries as "don't tell this to controllers", so we avoid cycles.
  33320. Changes in version 0.1.0.11 - 2005-06-30
  33321. o Bugfixes on 0.1.0.x:
  33322. - Fix major security bug: servers were disregarding their
  33323. exit policies if clients behaved unexpectedly.
  33324. - Make OS X init script check for missing argument, so we don't
  33325. confuse users who invoke it incorrectly.
  33326. - Fix a seg fault in "tor --hash-password foo".
  33327. - The MAPADDRESS control command was broken.
  33328. Changes in version 0.1.1.1-alpha - 2005-06-29
  33329. o Bugfixes:
  33330. - Make OS X init script check for missing argument, so we don't
  33331. confuse users who invoke it incorrectly.
  33332. - Fix a seg fault in "tor --hash-password foo".
  33333. - Fix a possible way to DoS dirservers.
  33334. - When we complain that your exit policy implicitly allows local or
  33335. private address spaces, name them explicitly so operators can
  33336. fix it.
  33337. - Make the log message less scary when all the dirservers are
  33338. temporarily unreachable.
  33339. - We were printing the number of idle dns workers incorrectly when
  33340. culling them.
  33341. o Features:
  33342. - Revised controller protocol (version 1) that uses ascii rather
  33343. than binary. Add supporting libraries in python and java so you
  33344. can use the controller from your applications without caring how
  33345. our protocol works.
  33346. - Spiffy new support for crypto hardware accelerators. Can somebody
  33347. test this?
  33348. Changes in version 0.0.9.10 - 2005-06-16
  33349. o Bugfixes on 0.0.9.x (backported from 0.1.0.10):
  33350. - Refuse relay cells that claim to have a length larger than the
  33351. maximum allowed. This prevents a potential attack that could read
  33352. arbitrary memory (e.g. keys) from an exit server's process
  33353. (CVE-2005-2050).
  33354. Changes in version 0.1.0.10 - 2005-06-14
  33355. o Allow a few EINVALs from libevent before dying. Warn on kqueue with
  33356. libevent before 1.1a.
  33357. Changes in version 0.1.0.9-rc - 2005-06-09
  33358. o Bugfixes:
  33359. - Reset buf->highwater every time buf_shrink() is called, not just on
  33360. a successful shrink. This was causing significant memory bloat.
  33361. - Fix buffer overflow when checking hashed passwords.
  33362. - Security fix: if seeding the RNG on Win32 fails, quit.
  33363. - Allow seeding the RNG on Win32 even when you're not running as
  33364. Administrator.
  33365. - Disable threading on Solaris too. Something is wonky with it,
  33366. cpuworkers, and reentrant libs.
  33367. - Reenable the part of the code that tries to flush as soon as an
  33368. OR outbuf has a full TLS record available. Perhaps this will make
  33369. OR outbufs not grow as huge except in rare cases, thus saving lots
  33370. of CPU time plus memory.
  33371. - Reject malformed .onion addresses rather then passing them on as
  33372. normal web requests.
  33373. - Adapt patch from Adam Langley: fix possible memory leak in
  33374. tor_lookup_hostname().
  33375. - Initialize libevent later in the startup process, so the logs are
  33376. already established by the time we start logging libevent warns.
  33377. - Use correct errno on win32 if libevent fails.
  33378. - Check and warn about known-bad/slow libevent versions.
  33379. - Pay more attention to the ClientOnly config option.
  33380. - Have torctl.in/tor.sh.in check for location of su binary (needed
  33381. on FreeBSD)
  33382. - Correct/add man page entries for LongLivedPorts, ExitPolicy,
  33383. KeepalivePeriod, ClientOnly, NoPublish, HttpProxy, HttpsProxy,
  33384. HttpProxyAuthenticator
  33385. - Stop warning about sigpipes in the logs. We're going to
  33386. pretend that getting these occasionally is normal and fine.
  33387. - Resolve OS X installer bugs: stop claiming to be 0.0.9.2 in
  33388. certain
  33389. installer screens; and don't put stuff into StartupItems unless
  33390. the user asks you to.
  33391. - Require servers that use the default dirservers to have public IP
  33392. addresses. We have too many servers that are configured with private
  33393. IPs and their admins never notice the log entries complaining that
  33394. their descriptors are being rejected.
  33395. - Add OSX uninstall instructions. An actual uninstall script will
  33396. come later.
  33397. Changes in version 0.1.0.8-rc - 2005-05-23
  33398. o Bugfixes:
  33399. - It turns out that kqueue on OS X 10.3.9 was causing kernel
  33400. panics. Disable kqueue on all OS X Tors.
  33401. - Fix RPM: remove duplicate line accidentally added to the rpm
  33402. spec file.
  33403. - Disable threads on openbsd too, since its gethostaddr is not
  33404. reentrant either.
  33405. - Tolerate libevent 0.8 since it still works, even though it's
  33406. ancient.
  33407. - Enable building on Red Hat 9.0 again.
  33408. - Allow the middle hop of the testing circuit to be running any
  33409. version, now that most of them have the bugfix to let them connect
  33410. to unknown servers. This will allow reachability testing to work
  33411. even when 0.0.9.7-0.0.9.9 become obsolete.
  33412. - Handle relay cells with rh.length too large. This prevents
  33413. a potential attack that could read arbitrary memory (maybe even
  33414. keys) from the exit server's process.
  33415. - We screwed up the dirport reachability testing when we don't yet
  33416. have a cached version of the directory. Hopefully now fixed.
  33417. - Clean up router_load_single_router() (used by the controller),
  33418. so it doesn't seg fault on error.
  33419. - Fix a minor memory leak when somebody establishes an introduction
  33420. point at your Tor server.
  33421. - If a socks connection ends because read fails, don't warn that
  33422. you're not sending a socks reply back.
  33423. o Features:
  33424. - Add HttpProxyAuthenticator config option too, that works like
  33425. the HttpsProxyAuthenticator config option.
  33426. - Encode hashed controller passwords in hex instead of base64,
  33427. to make it easier to write controllers.
  33428. Changes in version 0.1.0.7-rc - 2005-05-17
  33429. o Bugfixes:
  33430. - Fix a bug in the OS X package installer that prevented it from
  33431. installing on Tiger.
  33432. - Fix a script bug in the OS X package installer that made it
  33433. complain during installation.
  33434. - Find libevent even if it's hiding in /usr/local/ and your
  33435. CFLAGS and LDFLAGS don't tell you to look there.
  33436. - Be able to link with libevent as a shared library (the default
  33437. after 1.0d), even if it's hiding in /usr/local/lib and even
  33438. if you haven't added /usr/local/lib to your /etc/ld.so.conf,
  33439. assuming you're running gcc. Otherwise fail and give a useful
  33440. error message.
  33441. - Fix a bug in the RPM packager: set home directory for _tor to
  33442. something more reasonable when first installing.
  33443. - Free a minor amount of memory that is still reachable on exit.
  33444. Changes in version 0.1.0.6-rc - 2005-05-14
  33445. o Bugfixes:
  33446. - Implement --disable-threads configure option. Disable threads on
  33447. netbsd by default, because it appears to have no reentrant resolver
  33448. functions.
  33449. - Apple's OS X 10.4.0 ships with a broken kqueue. The new libevent
  33450. release (1.1) detects and disables kqueue if it's broken.
  33451. - Append default exit policy before checking for implicit internal
  33452. addresses. Now we don't log a bunch of complaints on startup
  33453. when using the default exit policy.
  33454. - Some people were putting "Address " in their torrc, and they had
  33455. a buggy resolver that resolved " " to 0.0.0.0. Oops.
  33456. - If DataDir is ~/.tor, and that expands to /.tor, then default to
  33457. LOCALSTATEDIR/tor instead.
  33458. - Fix fragmented-message bug in TorControl.py.
  33459. - Resolve a minor bug which would prevent unreachable dirports
  33460. from getting suppressed in the published descriptor.
  33461. - When the controller gave us a new descriptor, we weren't resolving
  33462. it immediately, so Tor would think its address was 0.0.0.0 until
  33463. we fetched a new directory.
  33464. - Fix an uppercase/lowercase case error in suppressing a bogus
  33465. libevent warning on some Linuxes.
  33466. o Features:
  33467. - Begin scrubbing sensitive strings from logs by default. Turn off
  33468. the config option SafeLogging if you need to do debugging.
  33469. - Switch to a new buffer management algorithm, which tries to avoid
  33470. reallocing and copying quite as much. In first tests it looks like
  33471. it uses *more* memory on average, but less cpu.
  33472. - First cut at support for "create-fast" cells. Clients can use
  33473. these when extending to their first hop, since the TLS already
  33474. provides forward secrecy and authentication. Not enabled on
  33475. clients yet.
  33476. - When dirservers refuse a router descriptor, we now log its
  33477. contactinfo, platform, and the poster's IP address.
  33478. - Call tor_free_all instead of connections_free_all after forking, to
  33479. save memory on systems that need to fork.
  33480. - Whine at you if you're a server and you don't set your contactinfo.
  33481. - Implement --verify-config command-line option to check if your torrc
  33482. is valid without actually launching Tor.
  33483. - Rewrite address "serifos.exit" to "localhost.serifos.exit"
  33484. rather than just rejecting it.
  33485. Changes in version 0.1.0.5-rc - 2005-04-27
  33486. o Bugfixes:
  33487. - Stop trying to print a null pointer if an OR conn fails because
  33488. we didn't like its cert.
  33489. o Features:
  33490. - Switch our internal buffers implementation to use a ring buffer,
  33491. to hopefully improve performance for fast servers a lot.
  33492. - Add HttpsProxyAuthenticator support (basic auth only), based
  33493. on patch from Adam Langley.
  33494. - Bump the default BandwidthRate from 1 MB to 2 MB, to accommodate
  33495. the fast servers that have been joining lately.
  33496. - Give hidden service accesses extra time on the first attempt,
  33497. since 60 seconds is often only barely enough. This might improve
  33498. robustness more.
  33499. - Improve performance for dirservers: stop re-parsing the whole
  33500. directory every time you regenerate it.
  33501. - Add more debugging info to help us find the weird dns freebsd
  33502. pthreads bug; cleaner debug messages to help track future issues.
  33503. Changes in version 0.0.9.9 - 2005-04-23
  33504. o Bugfixes on 0.0.9.x:
  33505. - If unofficial Tor clients connect and send weird TLS certs, our
  33506. Tor server triggers an assert. This release contains a minimal
  33507. backport from the broader fix that we put into 0.1.0.4-rc.
  33508. Changes in version 0.1.0.4-rc - 2005-04-23
  33509. o Bugfixes:
  33510. - If unofficial Tor clients connect and send weird TLS certs, our
  33511. Tor server triggers an assert. Stop asserting, and start handling
  33512. TLS errors better in other situations too.
  33513. - When the controller asks us to tell it about all the debug-level
  33514. logs, it turns out we were generating debug-level logs while
  33515. telling it about them, which turns into a bad loop. Now keep
  33516. track of whether you're sending a debug log to the controller,
  33517. and don't log when you are.
  33518. - Fix the "postdescriptor" feature of the controller interface: on
  33519. non-complete success, only say "done" once.
  33520. o Features:
  33521. - Clients are now willing to load balance over up to 2mB, not 1mB,
  33522. of advertised bandwidth capacity.
  33523. - Add a NoPublish config option, so you can be a server (e.g. for
  33524. testing running Tor servers in other Tor networks) without
  33525. publishing your descriptor to the primary dirservers.
  33526. Changes in version 0.1.0.3-rc - 2005-04-08
  33527. o Improvements on 0.1.0.2-rc:
  33528. - Client now retries when streams end early for 'hibernating' or
  33529. 'resource limit' reasons, rather than failing them.
  33530. - More automated handling for dirserver operators:
  33531. - Automatically approve nodes running 0.1.0.2-rc or later,
  33532. now that the the reachability detection stuff is working.
  33533. - Now we allow two unverified servers with the same nickname
  33534. but different keys. But if a nickname is verified, only that
  33535. nickname+key are allowed.
  33536. - If you're an authdirserver connecting to an address:port,
  33537. and it's not the OR you were expecting, forget about that
  33538. descriptor. If he *was* the one you were expecting, then forget
  33539. about all other descriptors for that address:port.
  33540. - Allow servers to publish descriptors from 12 hours in the future.
  33541. Corollary: only whine about clock skew from the dirserver if
  33542. he's a trusted dirserver (since now even verified servers could
  33543. have quite wrong clocks).
  33544. - Adjust maximum skew and age for rendezvous descriptors: let skew
  33545. be 48 hours rather than 90 minutes.
  33546. - Efficiency improvements:
  33547. - Keep a big splay tree of (circid,orconn)->circuit mappings to make
  33548. it much faster to look up a circuit for each relay cell.
  33549. - Remove most calls to assert_all_pending_dns_resolves_ok(),
  33550. since they're eating our cpu on exit nodes.
  33551. - Stop wasting time doing a case insensitive comparison for every
  33552. dns name every time we do any lookup. Canonicalize the names to
  33553. lowercase and be done with it.
  33554. - Start sending 'truncated' cells back rather than destroy cells,
  33555. if the circuit closes in front of you. This means we won't have
  33556. to abandon partially built circuits.
  33557. - Only warn once per nickname from add_nickname_list_to_smartlist
  33558. per failure, so an entrynode or exitnode choice that's down won't
  33559. yell so much.
  33560. - Put a note in the torrc about abuse potential with the default
  33561. exit policy.
  33562. - Revise control spec and implementation to allow all log messages to
  33563. be sent to controller with their severities intact (suggested by
  33564. Matt Edman). Update TorControl to handle new log event types.
  33565. - Provide better explanation messages when controller's POSTDESCRIPTOR
  33566. fails.
  33567. - Stop putting nodename in the Platform string in server descriptors.
  33568. It doesn't actually help, and it is confusing/upsetting some people.
  33569. o Bugfixes on 0.1.0.2-rc:
  33570. - We were printing the host mask wrong in exit policies in server
  33571. descriptors. This isn't a critical bug though, since we were still
  33572. obeying the exit policy internally.
  33573. - Fix Tor when compiled with libevent but without pthreads: move
  33574. connection_unregister() from _connection_free() to
  33575. connection_free().
  33576. - Fix an assert trigger (already fixed in 0.0.9.x): when we have
  33577. the rare mysterious case of accepting a conn on 0.0.0.0:0, then
  33578. when we look through the connection array, we'll find any of the
  33579. cpu/dnsworkers. This is no good.
  33580. o Bugfixes on 0.0.9.8:
  33581. - Fix possible bug on threading platforms (e.g. win32) which was
  33582. leaking a file descriptor whenever a cpuworker or dnsworker died.
  33583. - When using preferred entry or exit nodes, ignore whether the
  33584. circuit wants uptime or capacity. They asked for the nodes, they
  33585. get the nodes.
  33586. - chdir() to your datadirectory at the *end* of the daemonize process,
  33587. not the beginning. This was a problem because the first time you
  33588. run tor, if your datadir isn't there, and you have runasdaemon set
  33589. to 1, it will try to chdir to it before it tries to create it. Oops.
  33590. - Handle changed router status correctly when dirserver reloads
  33591. fingerprint file. We used to be dropping all unverified descriptors
  33592. right then. The bug was hidden because we would immediately
  33593. fetch a directory from another dirserver, which would include the
  33594. descriptors we just dropped.
  33595. - When we're connecting to an OR and he's got a different nickname/key
  33596. than we were expecting, only complain loudly if we're an OP or a
  33597. dirserver. Complaining loudly to the OR admins just confuses them.
  33598. - Tie MAX_DIR_SIZE to MAX_BUF_SIZE, so now directory sizes won't get
  33599. artificially capped at 500kB.
  33600. Changes in version 0.0.9.8 - 2005-04-07
  33601. o Bugfixes on 0.0.9.x:
  33602. - We have a bug that I haven't found yet. Sometimes, very rarely,
  33603. cpuworkers get stuck in the 'busy' state, even though the cpuworker
  33604. thinks of itself as idle. This meant that no new circuits ever got
  33605. established. Here's a workaround to kill any cpuworker that's been
  33606. busy for more than 100 seconds.
  33607. Changes in version 0.1.0.2-rc - 2005-04-01
  33608. o Bugfixes on 0.1.0.1-rc:
  33609. - Fixes on reachability detection:
  33610. - Don't check for reachability while hibernating.
  33611. - If ORPort is reachable but DirPort isn't, still publish the
  33612. descriptor, but zero out DirPort until it's found reachable.
  33613. - When building testing circs for ORPort testing, use only
  33614. high-bandwidth nodes, so fewer circuits fail.
  33615. - Complain about unreachable ORPort separately from unreachable
  33616. DirPort, so the user knows what's going on.
  33617. - Make sure we only conclude ORPort reachability if we didn't
  33618. initiate the conn. Otherwise we could falsely conclude that
  33619. we're reachable just because we connected to the guy earlier
  33620. and he used that same pipe to extend to us.
  33621. - Authdirservers shouldn't do ORPort reachability detection,
  33622. since they're in clique mode, so it will be rare to find a
  33623. server not already connected to them.
  33624. - When building testing circuits, always pick middle hops running
  33625. Tor 0.0.9.7, so we avoid the "can't extend to unknown routers"
  33626. bug. (This is a kludge; it will go away when 0.0.9.x becomes
  33627. obsolete.)
  33628. - When we decide we're reachable, actually publish our descriptor
  33629. right then.
  33630. - Fix bug in redirectstream in the controller.
  33631. - Fix the state descriptor strings so logs don't claim edge streams
  33632. are in a different state than they actually are.
  33633. - Use recent libevent features when possible (this only really affects
  33634. win32 and osx right now, because the new libevent with these
  33635. features hasn't been released yet). Add code to suppress spurious
  33636. libevent log msgs.
  33637. - Prevent possible segfault in connection_close_unattached_ap().
  33638. - Fix newlines on torrc in win32.
  33639. - Improve error msgs when tor-resolve fails.
  33640. o Improvements on 0.0.9.x:
  33641. - New experimental script tor/contrib/ExerciseServer.py (needs more
  33642. work) that uses the controller interface to build circuits and
  33643. fetch pages over them. This will help us bootstrap servers that
  33644. have lots of capacity but haven't noticed it yet.
  33645. - New experimental script tor/contrib/PathDemo.py (needs more work)
  33646. that uses the controller interface to let you choose whole paths
  33647. via addresses like
  33648. "<hostname>.<path,separated by dots>.<length of path>.path"
  33649. - When we've connected to an OR and handshaked but didn't like
  33650. the result, we were closing the conn without sending destroy
  33651. cells back for pending circuits. Now send those destroys.
  33652. Changes in version 0.0.9.7 - 2005-04-01
  33653. o Bugfixes on 0.0.9.x:
  33654. - Fix another race crash bug (thanks to Glenn Fink for reporting).
  33655. - Compare identity to identity, not to nickname, when extending to
  33656. a router not already in the directory. This was preventing us from
  33657. extending to unknown routers. Oops.
  33658. - Make sure to create OS X Tor user in <500 range, so we aren't
  33659. creating actual system users.
  33660. - Note where connection-that-hasn't-sent-end was marked, and fix
  33661. a few really loud instances of this harmless bug (it's fixed more
  33662. in 0.1.0.x).
  33663. Changes in version 0.1.0.1-rc - 2005-03-28
  33664. o New features:
  33665. - Add reachability testing. Your Tor server will automatically try
  33666. to see if its ORPort and DirPort are reachable from the outside,
  33667. and it won't upload its descriptor until it decides they are.
  33668. - Handle unavailable hidden services better. Handle slow or busy
  33669. hidden services better.
  33670. - Add support for CONNECTing through https proxies, with "HttpsProxy"
  33671. config option.
  33672. - New exit policy: accept most low-numbered ports, rather than
  33673. rejecting most low-numbered ports.
  33674. - More Tor controller support (still experimental). See
  33675. http://tor.eff.org/doc/control-spec.txt for all the new features,
  33676. including signals to emulate unix signals from any platform;
  33677. redirectstream; extendcircuit; mapaddress; getinfo; postdescriptor;
  33678. closestream; closecircuit; etc.
  33679. - Make nt services work and start on startup on win32 (based on
  33680. patch by Matt Edman).
  33681. - Add a new AddressMap config directive to rewrite incoming socks
  33682. addresses. This lets you, for example, declare an implicit
  33683. required exit node for certain sites.
  33684. - Add a new TrackHostExits config directive to trigger addressmaps
  33685. for certain incoming socks addresses -- for sites that break when
  33686. your exit keeps changing (based on patch by Mike Perry).
  33687. - Redo the client-side dns cache so it's just an addressmap too.
  33688. - Notice when our IP changes, and reset stats/uptime/reachability.
  33689. - When an application is using socks5, give him the whole variety of
  33690. potential socks5 responses (connect refused, host unreachable, etc),
  33691. rather than just "success" or "failure".
  33692. - A more sane version numbering system. See
  33693. http://tor.eff.org/cvs/tor/doc/version-spec.txt for details.
  33694. - New contributed script "exitlist": a simple python script to
  33695. parse directories and find Tor nodes that exit to listed
  33696. addresses/ports.
  33697. - New contributed script "privoxy-tor-toggle" to toggle whether
  33698. Privoxy uses Tor. Seems to be configured for Debian by default.
  33699. - Report HTTP reasons to client when getting a response from directory
  33700. servers -- so you can actually know what went wrong.
  33701. - New config option MaxAdvertisedBandwidth which lets you advertise
  33702. a low bandwidthrate (to not attract as many circuits) while still
  33703. allowing a higher bandwidthrate in reality.
  33704. o Robustness/stability fixes:
  33705. - Make Tor use Niels Provos's libevent instead of its current
  33706. poll-but-sometimes-select mess. This will let us use faster async
  33707. cores (like epoll, kpoll, and /dev/poll), and hopefully work better
  33708. on Windows too.
  33709. - pthread support now too. This was forced because when we forked,
  33710. we ended up wasting a lot of duplicate ram over time. Also switch
  33711. to foo_r versions of some library calls to allow reentry and
  33712. threadsafeness.
  33713. - Better handling for heterogeneous / unreliable nodes:
  33714. - Annotate circuits w/ whether they aim to contain high uptime nodes
  33715. and/or high capacity nodes. When building circuits, choose
  33716. appropriate nodes.
  33717. - This means that every single node in an intro rend circuit,
  33718. not just the last one, will have a minimum uptime.
  33719. - New config option LongLivedPorts to indicate application streams
  33720. that will want high uptime circuits.
  33721. - Servers reset uptime when a dir fetch entirely fails. This
  33722. hopefully reflects stability of the server's network connectivity.
  33723. - If somebody starts his tor server in Jan 2004 and then fixes his
  33724. clock, don't make his published uptime be a year.
  33725. - Reset published uptime when you wake up from hibernation.
  33726. - Introduce a notion of 'internal' circs, which are chosen without
  33727. regard to the exit policy of the last hop. Intro and rendezvous
  33728. circs must be internal circs, to avoid leaking information. Resolve
  33729. and connect streams can use internal circs if they want.
  33730. - New circuit pooling algorithm: make sure to have enough circs around
  33731. to satisfy any predicted ports, and also make sure to have 2 internal
  33732. circs around if we've required internal circs lately (and with high
  33733. uptime if we've seen that lately too).
  33734. - Split NewCircuitPeriod option into NewCircuitPeriod (30 secs),
  33735. which describes how often we retry making new circuits if current
  33736. ones are dirty, and MaxCircuitDirtiness (10 mins), which describes
  33737. how long we're willing to make use of an already-dirty circuit.
  33738. - Cannibalize GENERAL circs to be C_REND, C_INTRO, S_INTRO, and S_REND
  33739. circ as necessary, if there are any completed ones lying around
  33740. when we try to launch one.
  33741. - Make hidden services try to establish a rendezvous for 30 seconds,
  33742. rather than for n (where n=3) attempts to build a circuit.
  33743. - Change SHUTDOWN_WAIT_LENGTH from a fixed 30 secs to a config option
  33744. "ShutdownWaitLength".
  33745. - Try to be more zealous about calling connection_edge_end when
  33746. things go bad with edge conns in connection.c.
  33747. - Revise tor-spec to add more/better stream end reasons.
  33748. - Revise all calls to connection_edge_end to avoid sending "misc",
  33749. and to take errno into account where possible.
  33750. o Bug fixes:
  33751. - Fix a race condition that can trigger an assert, when we have a
  33752. pending create cell and an OR connection fails right then.
  33753. - Fix several double-mark-for-close bugs, e.g. where we were finding
  33754. a conn for a cell even if that conn is already marked for close.
  33755. - Make sequence of log messages when starting on win32 with no config
  33756. file more reasonable.
  33757. - When choosing an exit node for a new non-internal circ, don't take
  33758. into account whether it'll be useful for any pending x.onion
  33759. addresses -- it won't.
  33760. - Turn addr_policy_compare from a tristate to a quadstate; this should
  33761. help address our "Ah, you allow 1.2.3.4:80. You are a good choice
  33762. for google.com" problem.
  33763. - Make "platform" string in descriptor more accurate for Win32 servers,
  33764. so it's not just "unknown platform".
  33765. - Fix an edge case in parsing config options (thanks weasel).
  33766. If they say "--" on the commandline, it's not an option.
  33767. - Reject odd-looking addresses at the client (e.g. addresses that
  33768. contain a colon), rather than having the server drop them because
  33769. they're malformed.
  33770. - tor-resolve requests were ignoring .exit if there was a working circuit
  33771. they could use instead.
  33772. - REUSEADDR on normal platforms means you can rebind to the port
  33773. right after somebody else has let it go. But REUSEADDR on win32
  33774. means to let you bind to the port _even when somebody else
  33775. already has it bound_! So, don't do that on Win32.
  33776. - Change version parsing logic: a version is "obsolete" if it is not
  33777. recommended and (1) there is a newer recommended version in the
  33778. same series, or (2) there are no recommended versions in the same
  33779. series, but there are some recommended versions in a newer series.
  33780. A version is "new" if it is newer than any recommended version in
  33781. the same series.
  33782. - Stop most cases of hanging up on a socks connection without sending
  33783. the socks reject.
  33784. o Helpful fixes:
  33785. - Require BandwidthRate to be at least 20kB/s for servers.
  33786. - When a dirserver causes you to give a warn, mention which dirserver
  33787. it was.
  33788. - New config option DirAllowPrivateAddresses for authdirservers.
  33789. Now by default they refuse router descriptors that have non-IP or
  33790. private-IP addresses.
  33791. - Stop publishing socksport in the directory, since it's not
  33792. actually meant to be public. For compatibility, publish a 0 there
  33793. for now.
  33794. - Change DirFetchPeriod/StatusFetchPeriod to have a special "Be
  33795. smart" value, that is low for servers and high for clients.
  33796. - If our clock jumps forward by 100 seconds or more, assume something
  33797. has gone wrong with our network and abandon all not-yet-used circs.
  33798. - Warn when exit policy implicitly allows local addresses.
  33799. - If we get an incredibly skewed timestamp from a dirserver mirror
  33800. that isn't a verified OR, don't warn -- it's probably him that's
  33801. wrong.
  33802. - Since we ship our own Privoxy on OS X, tweak it so it doesn't write
  33803. cookies to disk and doesn't log each web request to disk. (Thanks
  33804. to Brett Carrington for pointing this out.)
  33805. - When a client asks us for a dir mirror and we don't have one,
  33806. launch an attempt to get a fresh one.
  33807. - If we're hibernating and we get a SIGINT, exit immediately.
  33808. - Add --with-dmalloc ./configure option, to track memory leaks.
  33809. - And try to free all memory on closing, so we can detect what
  33810. we're leaking.
  33811. - Cache local dns resolves correctly even when they're .exit
  33812. addresses.
  33813. - Give a better warning when some other server advertises an
  33814. ORPort that is actually an apache running ssl.
  33815. - Add "opt hibernating 1" to server descriptor to make it clearer
  33816. whether the server is hibernating.
  33817. Changes in version 0.0.9.6 - 2005-03-24
  33818. o Bugfixes on 0.0.9.x (crashes and asserts):
  33819. - Add new end stream reasons to maintenance branch. Fix bug where
  33820. reason (8) could trigger an assert. Prevent bug from recurring.
  33821. - Apparently win32 stat wants paths to not end with a slash.
  33822. - Fix assert triggers in assert_cpath_layer_ok(), where we were
  33823. blowing away the circuit that conn->cpath_layer points to, then
  33824. checking to see if the circ is well-formed. Backport check to make
  33825. sure we dont use the cpath on a closed connection.
  33826. - Prevent circuit_resume_edge_reading_helper() from trying to package
  33827. inbufs for marked-for-close streams.
  33828. - Don't crash on hup if your options->address has become unresolvable.
  33829. - Some systems (like OS X) sometimes accept() a connection and tell
  33830. you the remote host is 0.0.0.0:0. If this happens, due to some
  33831. other mis-features, we get confused; so refuse the conn for now.
  33832. o Bugfixes on 0.0.9.x (other):
  33833. - Fix harmless but scary "Unrecognized content encoding" warn message.
  33834. - Add new stream error reason: TORPROTOCOL reason means "you are not
  33835. speaking a version of Tor I understand; say bye-bye to your stream."
  33836. - Be willing to cache directories from up to ROUTER_MAX_AGE seconds
  33837. into the future, now that we are more tolerant of skew. This
  33838. resolves a bug where a Tor server would refuse to cache a directory
  33839. because all the directories it gets are too far in the future;
  33840. yet the Tor server never logs any complaints about clock skew.
  33841. - Mac packaging magic: make man pages useable, and do not overwrite
  33842. existing torrc files.
  33843. - Make OS X log happily to /var/log/tor/tor.log
  33844. Changes in version 0.0.9.5 - 2005-02-22
  33845. o Bugfixes on 0.0.9.x:
  33846. - Fix an assert race at exit nodes when resolve requests fail.
  33847. - Stop picking unverified dir mirrors--it only leads to misery.
  33848. - Patch from Matt Edman to make NT services work better. Service
  33849. support is still not compiled into the executable by default.
  33850. - Patch from Dmitri Bely so the Tor service runs better under
  33851. the win32 SYSTEM account.
  33852. - Make tor-resolve actually work (?) on Win32.
  33853. - Fix a sign bug when getrlimit claims to have 4+ billion
  33854. file descriptors available.
  33855. - Stop refusing to start when bandwidthburst == bandwidthrate.
  33856. - When create cells have been on the onion queue more than five
  33857. seconds, just send back a destroy and take them off the list.
  33858. Changes in version 0.0.9.4 - 2005-02-03
  33859. o Bugfixes on 0.0.9:
  33860. - Fix an assert bug that took down most of our servers: when
  33861. a server claims to have 1 GB of bandwidthburst, don't
  33862. freak out.
  33863. - Don't crash as badly if we have spawned the max allowed number
  33864. of dnsworkers, or we're out of file descriptors.
  33865. - Block more file-sharing ports in the default exit policy.
  33866. - MaxConn is now automatically set to the hard limit of max
  33867. file descriptors we're allowed (ulimit -n), minus a few for
  33868. logs, etc.
  33869. - Give a clearer message when servers need to raise their
  33870. ulimit -n when they start running out of file descriptors.
  33871. - SGI Compatibility patches from Jan Schaumann.
  33872. - Tolerate a corrupt cached directory better.
  33873. - When a dirserver hasn't approved your server, list which one.
  33874. - Go into soft hibernation after 95% of the bandwidth is used,
  33875. not 99%. This is especially important for daily hibernators who
  33876. have a small accounting max. Hopefully it will result in fewer
  33877. cut connections when the hard hibernation starts.
  33878. - Load-balance better when using servers that claim more than
  33879. 800kB/s of capacity.
  33880. - Make NT services work (experimental, only used if compiled in).
  33881. Changes in version 0.0.9.3 - 2005-01-21
  33882. o Bugfixes on 0.0.9:
  33883. - Backport the cpu use fixes from main branch, so busy servers won't
  33884. need as much processor time.
  33885. - Work better when we go offline and then come back, or when we
  33886. run Tor at boot before the network is up. We do this by
  33887. optimistically trying to fetch a new directory whenever an
  33888. application request comes in and we think we're offline -- the
  33889. human is hopefully a good measure of when the network is back.
  33890. - Backport some minimal hidserv bugfixes: keep rend circuits open as
  33891. long as you keep using them; actually publish hidserv descriptors
  33892. shortly after they change, rather than waiting 20-40 minutes.
  33893. - Enable Mac startup script by default.
  33894. - Fix duplicate dns_cancel_pending_resolve reported by Giorgos Pallas.
  33895. - When you update AllowUnverifiedNodes or FirewallPorts via the
  33896. controller's setconf feature, we were always appending, never
  33897. resetting.
  33898. - When you update HiddenServiceDir via setconf, it was screwing up
  33899. the order of reading the lines, making it fail.
  33900. - Do not rewrite a cached directory back to the cache; otherwise we
  33901. will think it is recent and not fetch a newer one on startup.
  33902. - Workaround for webservers that lie about Content-Encoding: Tor
  33903. now tries to autodetect compressed directories and compression
  33904. itself. This lets us Proxypass dir fetches through apache.
  33905. Changes in version 0.0.9.2 - 2005-01-04
  33906. o Bugfixes on 0.0.9 (crashes and asserts):
  33907. - Fix an assert on startup when the disk is full and you're logging
  33908. to a file.
  33909. - If you do socks4 with an IP of 0.0.0.x but *don't* provide a socks4a
  33910. style address, then we'd crash.
  33911. - Fix an assert trigger when the running-routers string we get from
  33912. a dirserver is broken.
  33913. - Make worker threads start and run on win32. Now win32 servers
  33914. may work better.
  33915. - Bandaid (not actually fix, but now it doesn't crash) an assert
  33916. where the dns worker dies mysteriously and the main Tor process
  33917. doesn't remember anything about the address it was resolving.
  33918. o Bugfixes on 0.0.9 (Win32):
  33919. - Workaround for brain-damaged __FILE__ handling on MSVC: keep Nick's
  33920. name out of the warning/assert messages.
  33921. - Fix a superficial "unhandled error on read" bug on win32.
  33922. - The win32 installer no longer requires a click-through for our
  33923. license, since our Free Software license grants rights but does not
  33924. take any away.
  33925. - Win32: When connecting to a dirserver fails, try another one
  33926. immediately. (This was already working for non-win32 Tors.)
  33927. - Stop trying to parse $HOME on win32 when hunting for default
  33928. DataDirectory.
  33929. - Make tor-resolve.c work on win32 by calling network_init().
  33930. o Bugfixes on 0.0.9 (other):
  33931. - Make 0.0.9.x build on Solaris again.
  33932. - Due to a fencepost error, we were blowing away the \n when reporting
  33933. confvalue items in the controller. So asking for multiple config
  33934. values at once couldn't work.
  33935. - When listing circuits that are pending on an opening OR connection,
  33936. if we're an OR we were listing circuits that *end* at us as
  33937. being pending on every listener, dns/cpu worker, etc. Stop that.
  33938. - Dirservers were failing to create 'running-routers' or 'directory'
  33939. strings if we had more than some threshold of routers. Fix them so
  33940. they can handle any number of routers.
  33941. - Fix a superficial "Duplicate mark for close" bug.
  33942. - Stop checking for clock skew for OR connections, even for servers.
  33943. - Fix a fencepost error that was chopping off the last letter of any
  33944. nickname that is the maximum allowed nickname length.
  33945. - Update URLs in log messages so they point to the new website.
  33946. - Fix a potential problem in mangling server private keys while
  33947. writing to disk (not triggered yet, as far as we know).
  33948. - Include the licenses for other free software we include in Tor,
  33949. now that we're shipping binary distributions more regularly.
  33950. Changes in version 0.0.9.1 - 2004-12-15
  33951. o Bugfixes on 0.0.9:
  33952. - Make hibernation actually work.
  33953. - Make HashedControlPassword config option work.
  33954. - When we're reporting event circuit status to a controller,
  33955. don't use the stream status code.
  33956. Changes in version 0.0.9 - 2004-12-12
  33957. o Cleanups:
  33958. - Clean up manpage and torrc.sample file.
  33959. - Clean up severities and text of log warnings.
  33960. o Mistakes:
  33961. - Make servers trigger an assert when they enter hibernation.
  33962. Changes in version 0.0.9rc7 - 2004-12-08
  33963. o Bugfixes on 0.0.9rc:
  33964. - Fix a stack-trashing crash when an exit node begins hibernating.
  33965. - Avoid looking at unallocated memory while considering which
  33966. ports we need to build circuits to cover.
  33967. - Stop a sigpipe: when an 'end' cell races with eof from the app,
  33968. we shouldn't hold-open-until-flush if the eof arrived first.
  33969. - Fix a bug with init_cookie_authentication() in the controller.
  33970. - When recommending new-format log lines, if the upper bound is
  33971. LOG_ERR, leave it implicit.
  33972. o Bugfixes on 0.0.8.1:
  33973. - Fix a whole slew of memory leaks.
  33974. - Fix isspace() and friends so they still make Solaris happy
  33975. but also so they don't trigger asserts on win32.
  33976. - Fix parse_iso_time on platforms without strptime (eg win32).
  33977. - win32: tolerate extra "readable" events better.
  33978. - win32: when being multithreaded, leave parent fdarray open.
  33979. - Make unit tests work on win32.
  33980. Changes in version 0.0.9rc6 - 2004-12-06
  33981. o Bugfixes on 0.0.9pre:
  33982. - Clean up some more integer underflow opportunities (not exploitable
  33983. we think).
  33984. - While hibernating, hup should not regrow our listeners.
  33985. - Send an end to the streams we close when we hibernate, rather
  33986. than just chopping them off.
  33987. - React to eof immediately on non-open edge connections.
  33988. o Bugfixes on 0.0.8.1:
  33989. - Calculate timeout for waiting for a connected cell from the time
  33990. we sent the begin cell, not from the time the stream started. If
  33991. it took a long time to establish the circuit, we would time out
  33992. right after sending the begin cell.
  33993. - Fix router_compare_addr_to_addr_policy: it was not treating a port
  33994. of * as always matching, so we were picking reject *:* nodes as
  33995. exit nodes too. Oops.
  33996. o Features:
  33997. - New circuit building strategy: keep a list of ports that we've
  33998. used in the past 6 hours, and always try to have 2 circuits open
  33999. or on the way that will handle each such port. Seed us with port
  34000. 80 so web users won't complain that Tor is "slow to start up".
  34001. - Make kill -USR1 dump more useful stats about circuits.
  34002. - When warning about retrying or giving up, print the address, so
  34003. the user knows which one it's talking about.
  34004. - If you haven't used a clean circuit in an hour, throw it away,
  34005. just to be on the safe side. (This means after 6 hours a totally
  34006. unused Tor client will have no circuits open.)
  34007. Changes in version 0.0.9rc5 - 2004-12-01
  34008. o Bugfixes on 0.0.8.1:
  34009. - Disallow NDEBUG. We don't ever want anybody to turn off debug.
  34010. - Let resolve conns retry/expire also, rather than sticking around
  34011. forever.
  34012. - If we are using select, make sure we stay within FD_SETSIZE.
  34013. o Bugfixes on 0.0.9pre:
  34014. - Fix integer underflow in tor_vsnprintf() that may be exploitable,
  34015. but doesn't seem to be currently; thanks to Ilja van Sprundel for
  34016. finding it.
  34017. - If anybody set DirFetchPostPeriod, give them StatusFetchPeriod
  34018. instead. Impose minima and maxima for all *Period options; impose
  34019. even tighter maxima for fetching if we are a caching dirserver.
  34020. Clip rather than rejecting.
  34021. - Fetch cached running-routers from servers that serve it (that is,
  34022. authdirservers and servers running 0.0.9rc5-cvs or later.)
  34023. o Features:
  34024. - Accept *:706 (silc) in default exit policy.
  34025. - Implement new versioning format for post 0.1.
  34026. - Support "foo.nickname.exit" addresses, to let Alice request the
  34027. address "foo" as viewed by exit node "nickname". Based on a patch
  34028. by Geoff Goodell.
  34029. - Make tor --version --version dump the cvs Id of every file.
  34030. Changes in version 0.0.9rc4 - 2004-11-28
  34031. o Bugfixes on 0.0.8.1:
  34032. - Make windows sockets actually non-blocking (oops), and handle
  34033. win32 socket errors better.
  34034. o Bugfixes on 0.0.9rc1:
  34035. - Actually catch the -USR2 signal.
  34036. Changes in version 0.0.9rc3 - 2004-11-25
  34037. o Bugfixes on 0.0.8.1:
  34038. - Flush the log file descriptor after we print "Tor opening log file",
  34039. so we don't see those messages days later.
  34040. o Bugfixes on 0.0.9rc1:
  34041. - Make tor-resolve work again.
  34042. - Avoid infinite loop in tor-resolve if tor hangs up on it.
  34043. - Fix an assert trigger for clients/servers handling resolves.
  34044. Changes in version 0.0.9rc2 - 2004-11-24
  34045. o Bugfixes on 0.0.9rc1:
  34046. - I broke socks5 support while fixing the eof bug.
  34047. - Allow unitless bandwidths and intervals; they default to bytes
  34048. and seconds.
  34049. - New servers don't start out hibernating; they are active until
  34050. they run out of bytes, so they have a better estimate of how
  34051. long it takes, and so their operators can know they're working.
  34052. Changes in version 0.0.9rc1 - 2004-11-23
  34053. o Bugfixes on 0.0.8.1:
  34054. - Finally fix a bug that's been plaguing us for a year:
  34055. With high load, circuit package window was reaching 0. Whenever
  34056. we got a circuit-level sendme, we were reading a lot on each
  34057. socket, but only writing out a bit. So we would eventually reach
  34058. eof. This would be noticed and acted on even when there were still
  34059. bytes sitting in the inbuf.
  34060. - When poll() is interrupted, we shouldn't believe the revents values.
  34061. o Bugfixes on 0.0.9pre6:
  34062. - Fix hibernate bug that caused pre6 to be broken.
  34063. - Don't keep rephist info for routers that haven't had activity for
  34064. 24 hours. (This matters now that clients have keys, since we track
  34065. them too.)
  34066. - Never call close_temp_logs while validating log options.
  34067. - Fix backslash-escaping on tor.sh.in and torctl.in.
  34068. o Features:
  34069. - Implement weekly/monthly/daily accounting: now you specify your
  34070. hibernation properties by
  34071. AccountingMax N bytes|KB|MB|GB|TB
  34072. AccountingStart day|week|month [day] HH:MM
  34073. Defaults to "month 1 0:00".
  34074. - Let bandwidth and interval config options be specified as 5 bytes,
  34075. kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.
  34076. - kill -USR2 now moves all logs to loglevel debug (kill -HUP to
  34077. get back to normal.)
  34078. - If your requested entry or exit node has advertised bandwidth 0,
  34079. pick it anyway.
  34080. - Be more greedy about filling up relay cells -- we try reading again
  34081. once we've processed the stuff we read, in case enough has arrived
  34082. to fill the last cell completely.
  34083. - Apply NT service patch from Osamu Fujino. Still needs more work.
  34084. Changes in version 0.0.9pre6 - 2004-11-15
  34085. o Bugfixes on 0.0.8.1:
  34086. - Fix assert failure on malformed socks4a requests.
  34087. - Use identity comparison, not nickname comparison, to choose which
  34088. half of circuit-ID-space each side gets to use. This is needed
  34089. because sometimes we think of a router as a nickname, and sometimes
  34090. as a hex ID, and we can't predict what the other side will do.
  34091. - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our
  34092. write() call will fail and we handle it there.
  34093. - Add a FAST_SMARTLIST define to optionally inline smartlist_get
  34094. and smartlist_len, which are two major profiling offenders.
  34095. o Bugfixes on 0.0.9pre5:
  34096. - Fix a bug in read_all that was corrupting config files on windows.
  34097. - When we're raising the max number of open file descriptors to
  34098. 'unlimited', don't log that we just raised it to '-1'.
  34099. - Include event code with events, as required by control-spec.txt.
  34100. - Don't give a fingerprint when clients do --list-fingerprint:
  34101. it's misleading, because it will never be the same again.
  34102. - Stop using strlcpy in tor_strndup, since it was slowing us
  34103. down a lot.
  34104. - Remove warn on startup about missing cached-directory file.
  34105. - Make kill -USR1 work again.
  34106. - Hibernate if we start tor during the "wait for wakeup-time" phase
  34107. of an accounting interval. Log our hibernation plans better.
  34108. - Authoritative dirservers now also cache their directory, so they
  34109. have it on start-up.
  34110. o Features:
  34111. - Fetch running-routers; cache running-routers; compress
  34112. running-routers; serve compressed running-routers.z
  34113. - Add NSI installer script contributed by J Doe.
  34114. - Commit VC6 and VC7 workspace/project files.
  34115. - Commit a tor.spec for making RPM files, with help from jbash.
  34116. - Add contrib/torctl.in contributed by Glenn Fink.
  34117. - Implement the control-spec's SAVECONF command, to write your
  34118. configuration to torrc.
  34119. - Get cookie authentication for the controller closer to working.
  34120. - Include control-spec.txt in the tarball.
  34121. - When set_conf changes our server descriptor, upload a new copy.
  34122. But don't upload it too often if there are frequent changes.
  34123. - Document authentication config in man page, and document signals
  34124. we catch.
  34125. - Clean up confusing parts of man page and torrc.sample.
  34126. - Make expand_filename handle ~ and ~username.
  34127. - Use autoconf to enable largefile support where necessary. Use
  34128. ftello where available, since ftell can fail at 2GB.
  34129. - Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can
  34130. log more informatively.
  34131. - Give a slightly more useful output for "tor -h".
  34132. - Refuse application socks connections to port 0.
  34133. - Check clock skew for verified servers, but allow unverified
  34134. servers and clients to have any clock skew.
  34135. - Break DirFetchPostPeriod into:
  34136. - DirFetchPeriod for fetching full directory,
  34137. - StatusFetchPeriod for fetching running-routers,
  34138. - DirPostPeriod for posting server descriptor,
  34139. - RendPostPeriod for posting hidden service descriptors.
  34140. - Make sure the hidden service descriptors are at a random offset
  34141. from each other, to hinder linkability.
  34142. Changes in version 0.0.9pre5 - 2004-11-09
  34143. o Bugfixes on 0.0.9pre4:
  34144. - Fix a seg fault in unit tests (doesn't affect main program).
  34145. - Fix an assert bug where a hidden service provider would fail if
  34146. the first hop of his rendezvous circuit was down.
  34147. - Hidden service operators now correctly handle version 1 style
  34148. INTRODUCE1 cells (nobody generates them still, so not a critical
  34149. bug).
  34150. - If do_hup fails, actually notice.
  34151. - Handle more errnos from accept() without closing the listener.
  34152. Some OpenBSD machines were closing their listeners because
  34153. they ran out of file descriptors.
  34154. - Send resolve cells to exit routers that are running a new
  34155. enough version of the resolve code to work right.
  34156. - Better handling of winsock includes on non-MSV win32 compilers.
  34157. - Some people had wrapped their tor client/server in a script
  34158. that would restart it whenever it died. This did not play well
  34159. with our "shut down if your version is obsolete" code. Now people
  34160. don't fetch a new directory if their local cached version is
  34161. recent enough.
  34162. - Make our autogen.sh work on ksh as well as bash.
  34163. o Major Features:
  34164. - Hibernation: New config option "AccountingMaxKB" lets you
  34165. set how many KBytes per month you want to allow your server to
  34166. consume. Rather than spreading those bytes out evenly over the
  34167. month, we instead hibernate for some of the month and pop up
  34168. at a deterministic time, work until the bytes are consumed, then
  34169. hibernate again. Config option "MonthlyAccountingStart" lets you
  34170. specify which day of the month your billing cycle starts on.
  34171. - Control interface: a separate program can now talk to your
  34172. client/server over a socket, and get/set config options, receive
  34173. notifications of circuits and streams starting/finishing/dying,
  34174. bandwidth used, etc. The next step is to get some GUIs working.
  34175. Let us know if you want to help out. See doc/control-spec.txt .
  34176. - Ship a contrib/tor-control.py as an example script to interact
  34177. with the control port.
  34178. - "tor --hash-password zzyxz" will output a salted password for
  34179. use in authenticating to the control interface.
  34180. - New log format in config:
  34181. "Log minsev[-maxsev] stdout|stderr|syslog" or
  34182. "Log minsev[-maxsev] file /var/foo"
  34183. o Minor Features:
  34184. - DirPolicy config option, to let people reject incoming addresses
  34185. from their dirserver.
  34186. - "tor --list-fingerprint" will list your identity key fingerprint
  34187. and then exit.
  34188. - Add "pass" target for RedirectExit, to make it easier to break
  34189. out of a sequence of RedirectExit rules.
  34190. - Clients now generate a TLS cert too, in preparation for having
  34191. them act more like real nodes.
  34192. - Ship src/win32/ in the tarball, so people can use it to build.
  34193. - Make old win32 fall back to CWD if SHGetSpecialFolderLocation
  34194. is broken.
  34195. - New "router-status" line in directory, to better bind each verified
  34196. nickname to its identity key.
  34197. - Deprecate unofficial config option abbreviations, and abbreviations
  34198. not on the command line.
  34199. - Add a pure-C tor-resolve implementation.
  34200. - Use getrlimit and friends to ensure we can reach MaxConn (currently
  34201. 1024) file descriptors.
  34202. o Code security improvements, inspired by Ilja:
  34203. - Replace sprintf with snprintf. (I think they were all safe, but
  34204. hey.)
  34205. - Replace strcpy/strncpy with strlcpy in more places.
  34206. - Avoid strcat; use snprintf or strlcat instead.
  34207. - snprintf wrapper with consistent (though not C99) overflow behavior.
  34208. Changes in version 0.0.9pre4 - 2004-10-17
  34209. o Bugfixes on 0.0.9pre3:
  34210. - If the server doesn't specify an exit policy, use the real default
  34211. exit policy, not reject *:*.
  34212. - Ignore fascistfirewall when uploading/downloading hidden service
  34213. descriptors, since we go through Tor for those; and when using
  34214. an HttpProxy, since we assume it can reach them all.
  34215. - When looking for an authoritative dirserver, use only the ones
  34216. configured at boot. Don't bother looking in the directory.
  34217. - The rest of the fix for get_default_conf_file() on older win32.
  34218. - Make 'Routerfile' config option obsolete.
  34219. o Features:
  34220. - New 'MyFamily nick1,...' config option for a server to
  34221. specify other servers that shouldn't be used in the same circuit
  34222. with it. Only believed if nick1 also specifies us.
  34223. - New 'NodeFamily nick1,nick2,...' config option for a client to
  34224. specify nodes that it doesn't want to use in the same circuit.
  34225. - New 'Redirectexit pattern address:port' config option for a
  34226. server to redirect exit connections, e.g. to a local squid.
  34227. Changes in version 0.0.9pre3 - 2004-10-13
  34228. o Bugfixes on 0.0.8.1:
  34229. - Better torrc example lines for dirbindaddress and orbindaddress.
  34230. - Improved bounds checking on parsed ints (e.g. config options and
  34231. the ones we find in directories.)
  34232. - Better handling of size_t vs int, so we're more robust on 64
  34233. bit platforms.
  34234. - Fix the rest of the bug where a newly started OR would appear
  34235. as unverified even after we've added his fingerprint and hupped
  34236. the dirserver.
  34237. - Fix a bug from 0.0.7: when read() failed on a stream, we would
  34238. close it without sending back an end. So 'connection refused'
  34239. would simply be ignored and the user would get no response.
  34240. o Bugfixes on 0.0.9pre2:
  34241. - Serving the cached-on-disk directory to people is bad. We now
  34242. provide no directory until we've fetched a fresh one.
  34243. - Workaround for bug on windows where cached-directories get crlf
  34244. corruption.
  34245. - Make get_default_conf_file() work on older windows too.
  34246. - If we write a *:* exit policy line in the descriptor, don't write
  34247. any more exit policy lines.
  34248. o Features:
  34249. - Use only 0.0.9pre1 and later servers for resolve cells.
  34250. - Make the dirservers file obsolete.
  34251. - Include a dir-signing-key token in directories to tell the
  34252. parsing entity which key is being used to sign.
  34253. - Remove the built-in bulky default dirservers string.
  34254. - New config option "Dirserver %s:%d [fingerprint]", which can be
  34255. repeated as many times as needed. If no dirservers specified,
  34256. default to moria1,moria2,tor26.
  34257. - Make moria2 advertise a dirport of 80, so people behind firewalls
  34258. will be able to get a directory.
  34259. - Http proxy support
  34260. - Dirservers translate requests for http://%s:%d/x to /x
  34261. - You can specify "HttpProxy %s[:%d]" and all dir fetches will
  34262. be routed through this host.
  34263. - Clients ask for /tor/x rather than /x for new enough dirservers.
  34264. This way we can one day coexist peacefully with apache.
  34265. - Clients specify a "Host: %s%d" http header, to be compatible
  34266. with more proxies, and so running squid on an exit node can work.
  34267. Changes in version 0.0.8.1 - 2004-10-13
  34268. o Bugfixes:
  34269. - Fix a seg fault that can be triggered remotely for Tor
  34270. clients/servers with an open dirport.
  34271. - Fix a rare assert trigger, where routerinfos for entries in
  34272. our cpath would expire while we're building the path.
  34273. - Fix a bug in OutboundBindAddress so it (hopefully) works.
  34274. - Fix a rare seg fault for people running hidden services on
  34275. intermittent connections.
  34276. - Fix a bug in parsing opt keywords with objects.
  34277. - Fix a stale pointer assert bug when a stream detaches and
  34278. reattaches.
  34279. - Fix a string format vulnerability (probably not exploitable)
  34280. in reporting stats locally.
  34281. - Fix an assert trigger: sometimes launching circuits can fail
  34282. immediately, e.g. because too many circuits have failed recently.
  34283. - Fix a compile warning on 64 bit platforms.
  34284. Changes in version 0.0.9pre2 - 2004-10-03
  34285. o Bugfixes:
  34286. - Make fetching a cached directory work for 64-bit platforms too.
  34287. - Make zlib.h a required header, not an optional header.
  34288. Changes in version 0.0.9pre1 - 2004-10-01
  34289. o Bugfixes:
  34290. - Stop using separate defaults for no-config-file and
  34291. empty-config-file. Now you have to explicitly turn off SocksPort,
  34292. if you don't want it open.
  34293. - Fix a bug in OutboundBindAddress so it (hopefully) works.
  34294. - Improve man page to mention more of the 0.0.8 features.
  34295. - Fix a rare seg fault for people running hidden services on
  34296. intermittent connections.
  34297. - Change our file IO stuff (especially wrt OpenSSL) so win32 is
  34298. happier.
  34299. - Fix more dns related bugs: send back resolve_failed and end cells
  34300. more reliably when the resolve fails, rather than closing the
  34301. circuit and then trying to send the cell. Also attach dummy resolve
  34302. connections to a circuit *before* calling dns_resolve(), to fix
  34303. a bug where cached answers would never be sent in RESOLVED cells.
  34304. - When we run out of disk space, or other log writing error, don't
  34305. crash. Just stop logging to that log and continue.
  34306. - We were starting to daemonize before we opened our logs, so if
  34307. there were any problems opening logs, we would complain to stderr,
  34308. which wouldn't work, and then mysteriously exit.
  34309. - Fix a rare bug where sometimes a verified OR would connect to us
  34310. before he'd uploaded his descriptor, which would cause us to
  34311. assign conn->nickname as though he's unverified. Now we look through
  34312. the fingerprint list to see if he's there.
  34313. - Fix a rare assert trigger, where routerinfos for entries in
  34314. our cpath would expire while we're building the path.
  34315. o Features:
  34316. - Clients can ask dirservers for /dir.z to get a compressed version
  34317. of the directory. Only works for servers running 0.0.9, of course.
  34318. - Make clients cache directories and use them to seed their router
  34319. lists at startup. This means clients have a datadir again.
  34320. - Configuration infrastructure support for warning on obsolete
  34321. options.
  34322. - Respond to content-encoding headers by trying to uncompress as
  34323. appropriate.
  34324. - Reply with a deflated directory when a client asks for "dir.z".
  34325. We could use allow-encodings instead, but allow-encodings isn't
  34326. specified in HTTP 1.0.
  34327. - Raise the max dns workers from 50 to 100.
  34328. - Discourage people from setting their dirfetchpostperiod more often
  34329. than once per minute.
  34330. - Protect dirservers from overzealous descriptor uploading -- wait
  34331. 10 seconds after directory gets dirty, before regenerating.
  34332. Changes in version 0.0.8 - 2004-08-25
  34333. o Port it to SunOS 5.9 / Athena
  34334. Changes in version 0.0.8rc2 - 2004-08-20
  34335. o Make it compile on cygwin again.
  34336. o When picking unverified routers, skip those with low uptime and/or
  34337. low bandwidth, depending on what properties you care about.
  34338. Changes in version 0.0.8rc1 - 2004-08-18
  34339. o Changes from 0.0.7.3:
  34340. - Bugfixes:
  34341. - Fix assert triggers: if the other side returns an address 0.0.0.0,
  34342. don't put it into the client dns cache.
  34343. - If a begin failed due to exit policy, but we believe the IP address
  34344. should have been allowed, switch that router to exitpolicy reject *:*
  34345. until we get our next directory.
  34346. - Features:
  34347. - Clients choose nodes proportional to advertised bandwidth.
  34348. - Avoid using nodes with low uptime as introduction points.
  34349. - Handle servers with dynamic IP addresses: don't replace
  34350. options->Address with the resolved one at startup, and
  34351. detect our address right before we make a routerinfo each time.
  34352. - 'FascistFirewall' option to pick dirservers and ORs on specific
  34353. ports; plus 'FirewallPorts' config option to tell FascistFirewall
  34354. which ports are open. (Defaults to 80,443)
  34355. - Be more aggressive about trying to make circuits when the network
  34356. has changed (e.g. when you unsuspend your laptop).
  34357. - Check for time skew on http headers; report date in response to
  34358. "GET /".
  34359. - If the entrynode config line has only one node, don't pick it as
  34360. an exitnode.
  34361. - Add strict{entry|exit}nodes config options. If set to 1, then
  34362. we refuse to build circuits that don't include the specified entry
  34363. or exit nodes.
  34364. - OutboundBindAddress config option, to bind to a specific
  34365. IP address for outgoing connect()s.
  34366. - End truncated log entries (e.g. directories) with "[truncated]".
  34367. o Patches to 0.0.8preX:
  34368. - Bugfixes:
  34369. - Patches to compile and run on win32 again (maybe)?
  34370. - Fix crash when looking for ~/.torrc with no $HOME set.
  34371. - Fix a race bug in the unit tests.
  34372. - Handle verified/unverified name collisions better when new
  34373. routerinfo's arrive in a directory.
  34374. - Sometimes routers were getting entered into the stats before
  34375. we'd assigned their identity_digest. Oops.
  34376. - Only pick and establish intro points after we've gotten a
  34377. directory.
  34378. - Features:
  34379. - AllowUnverifiedNodes config option to let circuits choose no-name
  34380. routers in entry,middle,exit,introduction,rendezvous positions.
  34381. Allow middle and rendezvous positions by default.
  34382. - Add a man page for tor-resolve.
  34383. Changes in version 0.0.7.3 - 2004-08-12
  34384. o Stop dnsworkers from triggering an assert failure when you
  34385. ask them to resolve the host "".
  34386. Changes in version 0.0.8pre3 - 2004-08-09
  34387. o Changes from 0.0.7.2:
  34388. - Allow multiple ORs with same nickname in routerlist -- now when
  34389. people give us one identity key for a nickname, then later
  34390. another, we don't constantly complain until the first expires.
  34391. - Remember used bandwidth (both in and out), and publish 15-minute
  34392. snapshots for the past day into our descriptor.
  34393. - You can now fetch $DIRURL/running-routers to get just the
  34394. running-routers line, not the whole descriptor list. (But
  34395. clients don't use this yet.)
  34396. - When people mistakenly use Tor as an http proxy, point them
  34397. at the tor-doc.html rather than the INSTALL.
  34398. - Remove our mostly unused -- and broken -- hex_encode()
  34399. function. Use base16_encode() instead. (Thanks to Timo Lindfors
  34400. for pointing out this bug.)
  34401. - Rotate onion keys every 12 hours, not every 2 hours, so we have
  34402. fewer problems with people using the wrong key.
  34403. - Change the default exit policy to reject the default edonkey,
  34404. kazaa, gnutella ports.
  34405. - Add replace_file() to util.[ch] to handle win32's rename().
  34406. o Changes from 0.0.8preX:
  34407. - Fix two bugs in saving onion keys to disk when rotating, so
  34408. hopefully we'll get fewer people using old onion keys.
  34409. - Fix an assert error that was making SocksPolicy not work.
  34410. - Be willing to expire routers that have an open dirport -- it's
  34411. just the authoritative dirservers we want to not forget.
  34412. - Reject tor-resolve requests for .onion addresses early, so we
  34413. don't build a whole rendezvous circuit and then fail.
  34414. - When you're warning a server that he's unverified, don't cry
  34415. wolf unpredictably.
  34416. - Fix a race condition: don't try to extend onto a connection
  34417. that's still handshaking.
  34418. - For servers in clique mode, require the conn to be open before
  34419. you'll choose it for your path.
  34420. - Fix some cosmetic bugs about duplicate mark-for-close, lack of
  34421. end relay cell, etc.
  34422. - Measure bandwidth capacity over the last 24 hours, not just 12
  34423. - Bugfix: authoritative dirservers were making and signing a new
  34424. directory for each client, rather than reusing the cached one.
  34425. Changes in version 0.0.8pre2 - 2004-08-04
  34426. o Changes from 0.0.7.2:
  34427. - Security fixes:
  34428. - Check directory signature _before_ you decide whether you're
  34429. you're running an obsolete version and should exit.
  34430. - Check directory signature _before_ you parse the running-routers
  34431. list to decide who's running or verified.
  34432. - Bugfixes and features:
  34433. - Check return value of fclose while writing to disk, so we don't
  34434. end up with broken files when servers run out of disk space.
  34435. - Log a warning if the user uses an unsafe socks variant, so people
  34436. are more likely to learn about privoxy or socat.
  34437. - Dirservers now include RFC1123-style dates in the HTTP headers,
  34438. which one day we will use to better detect clock skew.
  34439. o Changes from 0.0.8pre1:
  34440. - Make it compile without warnings again on win32.
  34441. - Log a warning if you're running an unverified server, to let you
  34442. know you might want to get it verified.
  34443. - Only pick a default nickname if you plan to be a server.
  34444. Changes in version 0.0.8pre1 - 2004-07-23
  34445. o Bugfixes:
  34446. - Made our unit tests compile again on OpenBSD 3.5, and tor
  34447. itself compile again on OpenBSD on a sparc64.
  34448. - We were neglecting milliseconds when logging on win32, so
  34449. everything appeared to happen at the beginning of each second.
  34450. o Protocol changes:
  34451. - 'Extend' relay cell payloads now include the digest of the
  34452. intended next hop's identity key. Now we can verify that we're
  34453. extending to the right router, and also extend to routers we
  34454. hadn't heard of before.
  34455. o Features:
  34456. - Tor nodes can now act as relays (with an advertised ORPort)
  34457. without being manually verified by the dirserver operators.
  34458. - Uploaded descriptors of unverified routers are now accepted
  34459. by the dirservers, and included in the directory.
  34460. - Verified routers are listed by nickname in the running-routers
  34461. list; unverified routers are listed as "$<fingerprint>".
  34462. - We now use hash-of-identity-key in most places rather than
  34463. nickname or addr:port, for improved security/flexibility.
  34464. - To avoid Sybil attacks, paths still use only verified servers.
  34465. But now we have a chance to play around with hybrid approaches.
  34466. - Nodes track bandwidth usage to estimate capacity (not used yet).
  34467. - ClientOnly option for nodes that never want to become servers.
  34468. - Directory caching.
  34469. - "AuthoritativeDir 1" option for the official dirservers.
  34470. - Now other nodes (clients and servers) will cache the latest
  34471. directory they've pulled down.
  34472. - They can enable their DirPort to serve it to others.
  34473. - Clients will pull down a directory from any node with an open
  34474. DirPort, and check the signature/timestamp correctly.
  34475. - Authoritative dirservers now fetch directories from other
  34476. authdirservers, to stay better synced.
  34477. - Running-routers list tells who's down also, along with noting
  34478. if they're verified (listed by nickname) or unverified (listed
  34479. by hash-of-key).
  34480. - Allow dirservers to serve running-router list separately.
  34481. This isn't used yet.
  34482. - ORs connect-on-demand to other ORs
  34483. - If you get an extend cell to an OR you're not connected to,
  34484. connect, handshake, and forward the create cell.
  34485. - The authoritative dirservers stay connected to everybody,
  34486. and everybody stays connected to 0.0.7 servers, but otherwise
  34487. clients/servers expire unused connections after 5 minutes.
  34488. - When servers get a sigint, they delay 30 seconds (refusing new
  34489. connections) then exit. A second sigint causes immediate exit.
  34490. - File and name management:
  34491. - Look for .torrc if no CONFDIR "torrc" is found.
  34492. - If no datadir is defined, then choose, make, and secure ~/.tor
  34493. as datadir.
  34494. - If torrc not found, exitpolicy reject *:*.
  34495. - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
  34496. - If no nickname is defined, derive default from hostname.
  34497. - Rename secret key files, e.g. identity.key -> secret_id_key,
  34498. to discourage people from mailing their identity key to tor-ops.
  34499. - Refuse to build a circuit before the directory has arrived --
  34500. it won't work anyway, since you won't know the right onion keys
  34501. to use.
  34502. - Try other dirservers immediately if the one you try is down. This
  34503. should tolerate down dirservers better now.
  34504. - Parse tor version numbers so we can do an is-newer-than check
  34505. rather than an is-in-the-list check.
  34506. - New socks command 'resolve', to let us shim gethostbyname()
  34507. locally.
  34508. - A 'tor_resolve' script to access the socks resolve functionality.
  34509. - A new socks-extensions.txt doc file to describe our
  34510. interpretation and extensions to the socks protocols.
  34511. - Add a ContactInfo option, which gets published in descriptor.
  34512. - Publish OR uptime in descriptor (and thus in directory) too.
  34513. - Write tor version at the top of each log file
  34514. - New docs in the tarball:
  34515. - tor-doc.html.
  34516. - Document that you should proxy your SSL traffic too.
  34517. Changes in version 0.0.7.2 - 2004-07-07
  34518. o A better fix for the 0.0.0.0 problem, that will hopefully
  34519. eliminate the remaining related assertion failures.
  34520. Changes in version 0.0.7.1 - 2004-07-04
  34521. o When an address resolves to 0.0.0.0, treat it as a failed resolve,
  34522. since internally we use 0.0.0.0 to signify "not yet resolved".
  34523. Changes in version 0.0.7 - 2004-06-07
  34524. o Updated the man page to reflect the new features.
  34525. Changes in version 0.0.7rc2 - 2004-06-06
  34526. o Changes from 0.0.7rc1:
  34527. - Make it build on Win32 again.
  34528. o Changes from 0.0.6.2:
  34529. - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
  34530. settings too.
  34531. Changes in version 0.0.7rc1 - 2004-06-02
  34532. o Bugfixes:
  34533. - On sighup, we were adding another log without removing the first
  34534. one. So log messages would get duplicated n times for n sighups.
  34535. - Several cases of using a connection after we'd freed it. The
  34536. problem was that connections that are pending resolve are in both
  34537. the pending_resolve tree, and also the circuit's resolving_streams
  34538. list. When you want to remove one, you must remove it from both.
  34539. - Fix a double-mark-for-close where an end cell arrived for a
  34540. resolving stream, and then the resolve failed.
  34541. - Check directory signatures based on name of signer, not on whom
  34542. we got the directory from. This will let us cache directories more
  34543. easily.
  34544. o Features:
  34545. - Crank up some of our constants to handle more users.
  34546. Changes in version 0.0.7pre1 - 2004-06-02
  34547. o Fixes for crashes and other obnoxious bugs:
  34548. - Fix an epipe bug: sometimes when directory connections failed
  34549. to connect, we would give them a chance to flush before closing
  34550. them.
  34551. - When we detached from a circuit because of resolvefailed, we
  34552. would immediately try the same circuit twice more, and then
  34553. give up on the resolve thinking we'd tried three different
  34554. exit nodes.
  34555. - Limit the number of intro circuits we'll attempt to build for a
  34556. hidden service per 15-minute period.
  34557. - Check recommended-software string *early*, before actually parsing
  34558. the directory. Thus we can detect an obsolete version and exit,
  34559. even if the new directory format doesn't parse.
  34560. o Fixes for security bugs:
  34561. - Remember which nodes are dirservers when you startup, and if a
  34562. random OR enables his dirport, don't automatically assume he's
  34563. a trusted dirserver.
  34564. o Other bugfixes:
  34565. - Directory connections were asking the wrong poll socket to
  34566. start writing, and not asking themselves to start writing.
  34567. - When we detached from a circuit because we sent a begin but
  34568. didn't get a connected, we would use it again the first time;
  34569. but after that we would correctly switch to a different one.
  34570. - Stop warning when the first onion decrypt attempt fails; they
  34571. will sometimes legitimately fail now that we rotate keys.
  34572. - Override unaligned-access-ok check when $host_cpu is ia64 or
  34573. arm. Apparently they allow it but the kernel whines.
  34574. - Dirservers try to reconnect periodically too, in case connections
  34575. have failed.
  34576. - Fix some memory leaks in directory servers.
  34577. - Allow backslash in Win32 filenames.
  34578. - Made Tor build complain-free on FreeBSD, hopefully without
  34579. breaking other BSD builds. We'll see.
  34580. o Features:
  34581. - Doxygen markup on all functions and global variables.
  34582. - Make directory functions update routerlist, not replace it. So
  34583. now directory disagreements are not so critical a problem.
  34584. - Remove the upper limit on number of descriptors in a dirserver's
  34585. directory (not that we were anywhere close).
  34586. - Allow multiple logfiles at different severity ranges.
  34587. - Allow *BindAddress to specify ":port" rather than setting *Port
  34588. separately. Allow multiple instances of each BindAddress config
  34589. option, so you can bind to multiple interfaces if you want.
  34590. - Allow multiple exit policy lines, which are processed in order.
  34591. Now we don't need that huge line with all the commas in it.
  34592. - Enable accept/reject policies on SOCKS connections, so you can bind
  34593. to 0.0.0.0 but still control who can use your OP.
  34594. Changes in version 0.0.6.2 - 2004-05-16
  34595. o Our integrity-checking digest was checking only the most recent cell,
  34596. not the previous cells like we'd thought.
  34597. Thanks to Stefan Mark for finding the flaw!
  34598. Changes in version 0.0.6.1 - 2004-05-06
  34599. o Fix two bugs in our AES counter-mode implementation (this affected
  34600. onion-level stream encryption, but not TLS-level). It turns
  34601. out we were doing something much more akin to a 16-character
  34602. polyalphabetic cipher. Oops.
  34603. Thanks to Stefan Mark for finding the flaw!
  34604. o Retire moria3 as a directory server, and add tor26 as a directory
  34605. server.
  34606. Changes in version 0.0.6 - 2004-05-02
  34607. [version bump only]
  34608. Changes in version 0.0.6rc4 - 2004-05-01
  34609. o Update the built-in dirservers list to use the new directory format
  34610. o Fix a rare seg fault: if a node offering a hidden service attempts
  34611. to build a circuit to Alice's rendezvous point and fails before it
  34612. reaches the last hop, it retries with a different circuit, but
  34613. then dies.
  34614. o Handle windows socket errors correctly.
  34615. Changes in version 0.0.6rc3 - 2004-04-28
  34616. o Don't expire non-general excess circuits (if we had enough
  34617. circuits open, we were expiring rendezvous circuits -- even
  34618. when they had a stream attached. oops.)
  34619. o Fetch randomness from /dev/urandom better (not via fopen/fread)
  34620. o Better debugging for tls errors
  34621. o Some versions of openssl have an SSL_pending function that erroneously
  34622. returns bytes when there is a non-application record pending.
  34623. o Set Content-Type on the directory and hidserv descriptor.
  34624. o Remove IVs from cipher code, since AES-ctr has none.
  34625. o Win32 fixes. Tor now compiles on win32 with no warnings/errors.
  34626. o We were using an array of length zero in a few places.
  34627. o win32's gethostbyname can't resolve an IP to an IP.
  34628. o win32's close can't close a socket.
  34629. Changes in version 0.0.6rc2 - 2004-04-26
  34630. o Fix a bug where we were closing tls connections intermittently.
  34631. It turns out openssl keeps its errors around -- so if an error
  34632. happens, and you don't ask about it, and then another openssl
  34633. operation happens and succeeds, and you ask if there was an error,
  34634. it tells you about the first error. Fun fun.
  34635. o Fix a bug that's been lurking since 27 may 03 (!)
  34636. When passing back a destroy cell, we would use the wrong circ id.
  34637. 'Mostly harmless', but still worth fixing.
  34638. o Since we don't support truncateds much, don't bother sending them;
  34639. just close the circ.
  34640. o check for <machine/limits.h> so we build on NetBSD again (I hope).
  34641. o don't crash if a conn that sent a begin has suddenly lost its circuit
  34642. (this was quite rare).
  34643. Changes in version 0.0.6rc1 - 2004-04-25
  34644. o We now rotate link (tls context) keys and onion keys.
  34645. o CREATE cells now include oaep padding, so you can tell
  34646. if you decrypted them correctly.
  34647. o Add bandwidthburst to server descriptor.
  34648. o Directories now say which dirserver signed them.
  34649. o Use a tor_assert macro that logs failed assertions too.
  34650. Changes in version 0.0.6pre5 - 2004-04-18
  34651. o changes from 0.0.6pre4:
  34652. - make tor build on broken freebsd 5.2 installs
  34653. - fix a failed assert when you try an intro point, get a nack, and try
  34654. a second one and it works.
  34655. - when alice uses a port that the hidden service doesn't accept,
  34656. it now sends back an end cell (denied by exit policy). otherwise
  34657. alice would just have to wait to time out.
  34658. - fix another rare bug: when we had tried all the intro
  34659. points for a hidden service, we fetched the descriptor
  34660. again, but we left our introcirc thinking it had already
  34661. sent an intro, so it kept waiting for a response...
  34662. - bugfix: when you sleep your hidden-service laptop, as soon
  34663. as it wakes up it tries to upload a service descriptor, but
  34664. socketpair fails for some reason (localhost not up yet?).
  34665. now we simply give up on that upload, and we'll try again later.
  34666. i'd still like to find the bug though.
  34667. - if an intro circ waiting for an ack dies before getting one, then
  34668. count it as a nack
  34669. - we were reusing stale service descriptors and refetching usable
  34670. ones. oops.
  34671. Changes in version 0.0.6pre4 - 2004-04-14
  34672. o changes from 0.0.6pre3:
  34673. - when bob fails to connect to the rendezvous point, and his
  34674. circ didn't fail because of the rendezvous point itself, then
  34675. he retries a couple of times
  34676. - we expire introduction and rendezvous circs more thoroughly
  34677. (sometimes they were hanging around forever)
  34678. - we expire unattached rendezvous streams that have been around
  34679. too long (they were sticking around forever).
  34680. - fix a measly fencepost error that was crashing everybody with
  34681. a strict glibc.
  34682. Changes in version 0.0.6pre3 - 2004-04-14
  34683. o changes from 0.0.6pre2:
  34684. - make hup work again
  34685. - fix some memory leaks for dirservers
  34686. - allow more skew in rendezvous descriptor timestamps, to help
  34687. handle people like blanu who don't know what time it is
  34688. - normal circs are 3 hops, but some rend/intro circs are 4, if
  34689. the initiator doesn't get to choose the last hop
  34690. - send acks for introductions, so alice can know whether to try
  34691. again
  34692. - bob publishes intro points more correctly
  34693. o changes from 0.0.5:
  34694. - fix an assert trigger that's been plaguing us since the days
  34695. of 0.0.2prexx (thanks weasel!)
  34696. - retry stream correctly when we fail to connect because of
  34697. exit-policy-reject (should try another) or can't-resolve-address
  34698. (also should try another, because dns on random internet servers
  34699. is flaky).
  34700. - when we hup a dirserver and we've *removed* a server from the
  34701. approved-routers list, now we remove that server from the
  34702. in-memory directories too
  34703. Changes in version 0.0.6pre2 - 2004-04-08
  34704. o We fixed our base32 implementation. Now it works on all architectures.
  34705. Changes in version 0.0.6pre1 - 2004-04-08
  34706. o Features:
  34707. - Hidden services and rendezvous points are implemented. Go to
  34708. http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
  34709. hidden services. (This only works via a socks4a proxy such as
  34710. Privoxy, and currently it's quite slow.)
  34711. Changes in version 0.0.5 - 2004-03-30
  34712. [version bump only]
  34713. Changes in version 0.0.5rc3 - 2004-03-29
  34714. o Install torrc as torrc.sample -- we no longer clobber your
  34715. torrc. (Woo!)
  34716. o Re-enable recommendedversion checking (we broke it in rc2, oops)
  34717. o Add in a 'notice' log level for things the operator should hear
  34718. but that aren't warnings
  34719. Changes in version 0.0.5rc2 - 2004-03-29
  34720. o Hold socks connection open until reply is flushed (if possible)
  34721. o Make exit nodes resolve IPs to IPs immediately, rather than asking
  34722. the dns farm to do it.
  34723. o Fix c99 aliasing warnings in rephist.c
  34724. o Don't include server descriptors that are older than 24 hours in the
  34725. directory.
  34726. o Give socks 'reject' replies their whole 15s to attempt to flush,
  34727. rather than seeing the 60s timeout and assuming the flush had failed.
  34728. o Clean automake droppings from the cvs repository
  34729. Changes in version 0.0.5rc1 - 2004-03-28
  34730. o Fix mangled-state bug in directory fetching (was causing sigpipes).
  34731. o Only build circuits after we've fetched the directory: clients were
  34732. using only the directory servers before they'd fetched a directory.
  34733. This also means longer startup time; so it goes.
  34734. o Fix an assert trigger where an OP would fail to handshake, and we'd
  34735. expect it to have a nickname.
  34736. o Work around a tsocks bug: do a socks reject when AP connection dies
  34737. early, else tsocks goes into an infinite loop.
  34738. Changes in version 0.0.4 - 2004-03-26
  34739. o When connecting to a dirserver or OR and the network is down,
  34740. we would crash.
  34741. Changes in version 0.0.3 - 2004-03-26
  34742. o Warn and fail if server chose a nickname with illegal characters
  34743. o Port to Solaris and Sparc:
  34744. - include missing header fcntl.h
  34745. - have autoconf find -lsocket -lnsl automatically
  34746. - deal with hardware word alignment
  34747. - make uname() work (solaris has a different return convention)
  34748. - switch from using signal() to sigaction()
  34749. o Preliminary work on reputation system:
  34750. - Keep statistics on success/fail of connect attempts; they're published
  34751. by kill -USR1 currently.
  34752. - Add a RunTesting option to try to learn link state by creating test
  34753. circuits, even when SocksPort is off.
  34754. - Remove unused open circuits when there are too many.
  34755. Changes in version 0.0.2 - 2004-03-19
  34756. - Include strlcpy and strlcat for safer string ops
  34757. - define INADDR_NONE so we compile (but still not run) on solaris
  34758. Changes in version 0.0.2pre27 - 2004-03-14
  34759. o Bugfixes:
  34760. - Allow internal tor networks (we were rejecting internal IPs,
  34761. now we allow them if they're set explicitly).
  34762. - And fix a few endian issues.
  34763. Changes in version 0.0.2pre26 - 2004-03-14
  34764. o New features:
  34765. - If a stream times out after 15s without a connected cell, don't
  34766. try that circuit again: try a new one.
  34767. - Retry streams at most 4 times. Then give up.
  34768. - When a dirserver gets a descriptor from an unknown router, it
  34769. logs its fingerprint (so the dirserver operator can choose to
  34770. accept it even without mail from the server operator).
  34771. - Inform unapproved servers when we reject their descriptors.
  34772. - Make tor build on Windows again. It works as a client, who knows
  34773. about as a server.
  34774. - Clearer instructions in the torrc for how to set up a server.
  34775. - Be more efficient about reading fd's when our global token bucket
  34776. (used for rate limiting) becomes empty.
  34777. o Bugfixes:
  34778. - Stop asserting that computers always go forward in time. It's
  34779. simply not true.
  34780. - When we sent a cell (e.g. destroy) and then marked an OR connection
  34781. expired, we might close it before finishing a flush if the other
  34782. side isn't reading right then.
  34783. - Don't allow dirservers to start if they haven't defined
  34784. RecommendedVersions
  34785. - We were caching transient dns failures. Oops.
  34786. - Prevent servers from publishing an internal IP as their address.
  34787. - Address a strcat vulnerability in circuit.c
  34788. Changes in version 0.0.2pre25 - 2004-03-04
  34789. o New features:
  34790. - Put the OR's IP in its router descriptor, not its fqdn. That way
  34791. we'll stop being stalled by gethostbyname for nodes with flaky dns,
  34792. e.g. poblano.
  34793. o Bugfixes:
  34794. - If the user typed in an address that didn't resolve, the server
  34795. crashed.
  34796. Changes in version 0.0.2pre24 - 2004-03-03
  34797. o Bugfixes:
  34798. - Fix an assertion failure in dns.c, where we were trying to dequeue
  34799. a pending dns resolve even if it wasn't pending
  34800. - Fix a spurious socks5 warning about still trying to write after the
  34801. connection is finished.
  34802. - Hold certain marked_for_close connections open until they're finished
  34803. flushing, rather than losing bytes by closing them too early.
  34804. - Correctly report the reason for ending a stream
  34805. - Remove some duplicate calls to connection_mark_for_close
  34806. - Put switch_id and start_daemon earlier in the boot sequence, so it
  34807. will actually try to chdir() to options.DataDirectory
  34808. - Make 'make test' exit(1) if a test fails; fix some unit tests
  34809. - Make tor fail when you use a config option it doesn't know about,
  34810. rather than warn and continue.
  34811. - Make --version work
  34812. - Bugfixes on the rpm spec file and tor.sh, so it's more up to date
  34813. Changes in version 0.0.2pre23 - 2004-02-29
  34814. o New features:
  34815. - Print a statement when the first circ is finished, so the user
  34816. knows it's working.
  34817. - If a relay cell is unrecognized at the end of the circuit,
  34818. send back a destroy. (So attacks to mutate cells are more
  34819. clearly thwarted.)
  34820. - New config option 'excludenodes' to avoid certain nodes for circuits.
  34821. - When it daemonizes, it chdir's to the DataDirectory rather than "/",
  34822. so you can collect coredumps there.
  34823. o Bugfixes:
  34824. - Fix a bug in tls flushing where sometimes data got wedged and
  34825. didn't flush until more data got sent. Hopefully this bug was
  34826. a big factor in the random delays we were seeing.
  34827. - Make 'connected' cells include the resolved IP, so the client
  34828. dns cache actually gets populated.
  34829. - Disallow changing from ORPort=0 to ORPort>0 on hup.
  34830. - When we time-out on a stream and detach from the circuit, send an
  34831. end cell down it first.
  34832. - Only warn about an unknown router (in exitnodes, entrynodes,
  34833. excludenodes) after we've fetched a directory.
  34834. Changes in version 0.0.2pre22 - 2004-02-26
  34835. o New features:
  34836. - Servers publish less revealing uname information in descriptors.
  34837. - More memory tracking and assertions, to crash more usefully when
  34838. errors happen.
  34839. - If the default torrc isn't there, just use some default defaults.
  34840. Plus provide an internal dirservers file if they don't have one.
  34841. - When the user tries to use Tor as an http proxy, give them an http
  34842. 501 failure explaining that we're a socks proxy.
  34843. - Dump a new router.desc on hup, to help confused people who change
  34844. their exit policies and then wonder why router.desc doesn't reflect
  34845. it.
  34846. - Clean up the generic tor.sh init script that we ship with.
  34847. o Bugfixes:
  34848. - If the exit stream is pending on the resolve, and a destroy arrives,
  34849. then the stream wasn't getting removed from the pending list. I
  34850. think this was the one causing recent server crashes.
  34851. - Use a more robust poll on OSX 10.3, since their poll is flaky.
  34852. - When it couldn't resolve any dirservers, it was useless from then on.
  34853. Now it reloads the RouterFile (or default dirservers) if it has no
  34854. dirservers.
  34855. - Move the 'tor' binary back to /usr/local/bin/ -- it turns out
  34856. many users don't even *have* a /usr/local/sbin/.
  34857. Changes in version 0.0.2pre21 - 2004-02-18
  34858. o New features:
  34859. - There's a ChangeLog file that actually reflects the changelog.
  34860. - There's a 'torify' wrapper script, with an accompanying
  34861. tor-tsocks.conf, that simplifies the process of using tsocks for
  34862. tor. It even has a man page.
  34863. - The tor binary gets installed to sbin rather than bin now.
  34864. - Retry streams where the connected cell hasn't arrived in 15 seconds
  34865. - Clean up exit policy handling -- get the default out of the torrc,
  34866. so we can update it without forcing each server operator to fix
  34867. his/her torrc.
  34868. - Allow imaps and pop3s in default exit policy
  34869. o Bugfixes:
  34870. - Prevent picking middleman nodes as the last node in the circuit
  34871. Changes in version 0.0.2pre20 - 2004-01-30
  34872. o New features:
  34873. - We now have a deb package, and it's in debian unstable. Go to
  34874. it, apt-getters. :)
  34875. - I've split the TotalBandwidth option into BandwidthRate (how many
  34876. bytes per second you want to allow, long-term) and
  34877. BandwidthBurst (how many bytes you will allow at once before the cap
  34878. kicks in). This better token bucket approach lets you, say, set
  34879. BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
  34880. performance while not exceeding your monthly bandwidth quota.
  34881. - Push out a tls record's worth of data once you've got it, rather
  34882. than waiting until you've read everything waiting to be read. This
  34883. may improve performance by pipelining better. We'll see.
  34884. - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
  34885. from failed circuits (if they haven't been connected yet) and attach
  34886. to new ones.
  34887. - Expire old streams that haven't managed to connect. Some day we'll
  34888. have them reattach to new circuits instead.
  34889. o Bugfixes:
  34890. - Fix several memory leaks that were causing servers to become bloated
  34891. after a while.
  34892. - Fix a few very rare assert triggers. A few more remain.
  34893. - Setuid to User _before_ complaining about running as root.
  34894. Changes in version 0.0.2pre19 - 2004-01-07
  34895. o Bugfixes:
  34896. - Fix deadlock condition in dns farm. We were telling a child to die by
  34897. closing the parent's file descriptor to him. But newer children were
  34898. inheriting the open file descriptor from the parent, and since they
  34899. weren't closing it, the socket never closed, so the child never read
  34900. eof, so he never knew to exit. Similarly, dns workers were holding
  34901. open other sockets, leading to all sorts of chaos.
  34902. - New cleaner daemon() code for forking and backgrounding.
  34903. - If you log to a file, it now prints an entry at the top of the
  34904. logfile so you know it's working.
  34905. - The onionskin challenge length was 30 bytes longer than necessary.
  34906. - Started to patch up the spec so it's not quite so out of date.
  34907. Changes in version 0.0.2pre18 - 2004-01-02
  34908. o Bugfixes:
  34909. - Fix endian issues with the 'integrity' field in the relay header.
  34910. - Fix a potential bug where connections in state
  34911. AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
  34912. Changes in version 0.0.2pre17 - 2003-12-30
  34913. o Bugfixes:
  34914. - Made --debuglogfile (or any second log file, actually) work.
  34915. - Resolved an edge case in get_unique_circ_id_by_conn where a smart
  34916. adversary could force us into an infinite loop.
  34917. o Features:
  34918. - Each onionskin handshake now includes a hash of the computed key,
  34919. to prove the server's identity and help perfect forward secrecy.
  34920. - Changed cell size from 256 to 512 bytes (working toward compatibility
  34921. with MorphMix).
  34922. - Changed cell length to 2 bytes, and moved it to the relay header.
  34923. - Implemented end-to-end integrity checking for the payloads of
  34924. relay cells.
  34925. - Separated streamid from 'recognized' (otherwise circuits will get
  34926. messed up when we try to have streams exit from the middle). We
  34927. use the integrity-checking to confirm that a cell is addressed to
  34928. this hop.
  34929. - Randomize the initial circid and streamid values, so an adversary who
  34930. breaks into a node can't learn how many circuits or streams have
  34931. been made so far.
  34932. Changes in version 0.0.2pre16 - 2003-12-14
  34933. o Bugfixes:
  34934. - Fixed a bug that made HUP trigger an assert
  34935. - Fixed a bug where a circuit that immediately failed wasn't being
  34936. counted as a failed circuit in counting retries.
  34937. o Features:
  34938. - Now we close the circuit when we get a truncated cell: otherwise we're
  34939. open to an anonymity attack where a bad node in the path truncates
  34940. the circuit and then we open streams at him.
  34941. - Add port ranges to exit policies
  34942. - Add a conservative default exit policy
  34943. - Warn if you're running tor as root
  34944. - on HUP, retry OR connections and close/rebind listeners
  34945. - options.EntryNodes: try these nodes first when picking the first node
  34946. - options.ExitNodes: if your best choices happen to include any of
  34947. your preferred exit nodes, you choose among just those preferred
  34948. exit nodes.
  34949. - options.ExcludedNodes: nodes that are never picked in path building
  34950. Changes in version 0.0.2pre15 - 2003-12-03
  34951. o Robustness and bugfixes:
  34952. - Sometimes clients would cache incorrect DNS resolves, which would
  34953. really screw things up.
  34954. - An OP that goes offline would slowly leak all its sockets and stop
  34955. working.
  34956. - A wide variety of bugfixes in exit node selection, exit policy
  34957. handling, and processing pending streams when a new circuit is
  34958. established.
  34959. - Pick nodes for a path only from those the directory says are up
  34960. - Choose randomly from all running dirservers, not always the first one
  34961. - Increase allowed http header size for directory fetch.
  34962. - Stop writing to stderr (if we're daemonized it will be closed).
  34963. - Enable -g always, so cores will be more useful to me.
  34964. - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
  34965. o Documentation:
  34966. - Wrote a man page. It lists commonly used options.
  34967. o Configuration:
  34968. - Change default loglevel to warn.
  34969. - Make PidFile default to null rather than littering in your CWD.
  34970. - OnionRouter config option is now obsolete. Instead it just checks
  34971. ORPort>0.
  34972. - Moved to a single unified torrc file for both clients and servers.
  34973. Changes in version 0.0.2pre14 - 2003-11-29
  34974. o Robustness and bugfixes:
  34975. - Force the admin to make the DataDirectory himself
  34976. - to get ownership/permissions right
  34977. - so clients no longer make a DataDirectory and then never use it
  34978. - fix bug where a client who was offline for 45 minutes would never
  34979. pull down a directory again
  34980. - fix (or at least hide really well) the dns assert bug that was
  34981. causing server crashes
  34982. - warnings and improved robustness wrt clockskew for certs
  34983. - use the native daemon(3) to daemonize, when available
  34984. - exit if bind() fails
  34985. - exit if neither socksport nor orport is defined
  34986. - include our own tor_timegm (Win32 doesn't have its own)
  34987. - bugfix for win32 with lots of connections
  34988. - fix minor bias in PRNG
  34989. - make dirserver more robust to corrupt cached directory
  34990. o Documentation:
  34991. - Wrote the design document (woo)
  34992. o Circuit building and exit policies:
  34993. - Circuits no longer try to use nodes that the directory has told them
  34994. are down.
  34995. - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
  34996. bitcounts (18.0.0.0/8).
  34997. - Make AP connections standby for a circuit if no suitable circuit
  34998. exists, rather than failing
  34999. - Circuits choose exit node based on addr/port, exit policies, and
  35000. which AP connections are standing by
  35001. - Bump min pathlen from 2 to 3
  35002. - Relay end cells have a payload to describe why the stream ended.
  35003. - If the stream failed because of exit policy, try again with a new
  35004. circuit.
  35005. - Clients have a dns cache to remember resolved addresses.
  35006. - Notice more quickly when we have no working circuits
  35007. o Configuration:
  35008. - APPort is now called SocksPort
  35009. - SocksBindAddress, ORBindAddress, DirBindAddress let you configure
  35010. where to bind
  35011. - RecommendedVersions is now a config variable rather than
  35012. hardcoded (for dirservers)
  35013. - Reloads config on HUP
  35014. - Usage info on -h or --help
  35015. - If you set User and Group config vars, it'll setu/gid to them.
  35016. Changes in version 0.0.2pre13 - 2003-10-19
  35017. o General stability:
  35018. - SSL_write no longer fails when it returns WANTWRITE and the number
  35019. of bytes in the buf has changed by the next SSL_write call.
  35020. - Fix segfault fetching directory when network is down
  35021. - Fix a variety of minor memory leaks
  35022. - Dirservers reload the fingerprints file on HUP, so I don't have
  35023. to take down the network when I approve a new router
  35024. - Default server config file has explicit Address line to specify fqdn
  35025. o Buffers:
  35026. - Buffers grow and shrink as needed (Cut process size from 20M to 2M)
  35027. - Make listener connections not ever alloc bufs
  35028. o Autoconf improvements:
  35029. - don't clobber an external CFLAGS in ./configure
  35030. - Make install now works
  35031. - create var/lib/tor on make install
  35032. - autocreate a tor.sh initscript to help distribs
  35033. - autocreate the torrc and sample-server-torrc with correct paths
  35034. o Log files and Daemonizing now work:
  35035. - If --DebugLogFile is specified, log to it at -l debug
  35036. - If --LogFile is specified, use it instead of commandline
  35037. - If --RunAsDaemon is set, tor forks and backgrounds on startup