1 Changes in version 0.4.6.1-alpha - 2021-03-??
2 Tor 0.4.6.1-alpha is the first alpha release in the 0.4.6.x series. It
3 improves client circuit performance, adds missing features, and
4 improves some of our DoS handling and statistics reporting. It also
5 includes numerous smaller bugfixes.
7 o Major features (control port, onion services):
8 - Add controller support for creating version 3 onion services with
9 client authorization. Previously, only v2 onion services could be
10 created with client authorization. Closes ticket 40084. Patch by
13 o Major features (directory authorityl):
14 - When voting for a relay with a Sybil-like appearance, add the
15 Sybil flag when clearing out the other flags. This lets a relay
16 operator know why their relay hasn't been voted on. Closes ticket
17 40255. Patch by Neel Chauhan.
19 o Major features (relay, denial of service):
20 - Add a new DoS subsystem feature to control the rate of client
21 connections for relays. Closes ticket 40253.
23 o Major features (statistics):
24 - Relays now also publish statistics about the number of v3 onion
25 services and volume of v3 onion service traffic, in the same
26 manner they already do for v2 onions. Closes ticket 23126.
28 o Major bugfixes (circuit build timeout):
29 - Improve the accuracy of our circuit build timeout calculation for
30 60%, 70%, and 80% build rates for various guard choices. We now
31 use a maximum likelihood estimator for Pareto parameters of the
32 circuit build time distribution, instead of a "right-censored
33 estimator". This causes clients to ignore circuits that never
34 finish building in their timeout calculations. Previously, clients
35 were counting such unfinished circuits as having the highest
36 possible build time value, when in reality these circuits most
37 likely just contain relays that are offline. We also now wait a
38 bit longer to let circuits complete for measurement purposes,
39 lower the minimum possible effective timeout from 1.5 seconds to
40 10ms, and increase the resolution of the circuit build time
41 histogram from 50ms bin widths to 10ms bin widths. Additionally,
42 we alter our estimate Xm by taking the maximum of the top 10 most
43 common build time values of the 10ms histogram, and compute Xm as
44 the average of these. Fixes bug 40168; bugfix on 0.2.2.14-alpha.
45 - Remove max_time calculation and associated warn from circuit build
46 timeout 'alpha' parameter estimation, as this is no longer needed
47 by our new estimator from 40168. Fixes bug 34088; bugfix
50 o Major bugfixes (signing key):
51 - In the tor-gencert utility, give an informative error message if
52 the passphrase given in `--create-identity-key` is too short.
53 Fixes bug 40189; bugfix on 0.2.0.1-alpha. Patch by Neel Chauhan.
55 o Minor features (bridge):
56 - We now announce the URL to Tor's new bridge status at
57 https://bridges.torproject.org/ when Tor is configured to run as a
58 bridge relay. Closes ticket 30477.
60 o Minor features (build system):
61 - New "make lsp" command to auto generate the compile_commands.json
62 file used by the ccls server. The "bear" program is needed for
63 this. Closes ticket 40227.
65 o Minor features (command-line interface):
66 - Add build informations to `tor --version` in order to ease
67 reproducible builds. Closes ticket 32102.
68 - When parsing command-line flags that take an optional argument,
69 treat the argument as absent if it would start with a '-'
70 character. Arguments in that form are not intelligible for any of
71 our optional-argument flags. Closes ticket 40223.
72 - Allow a relay operator to list the ed25519 keys on the command
73 line by adding the `rsa` and `ed25519` arguments to the
74 --list-fingerprint flag to show the respective RSA and ed25519
75 relay fingerprint. Closes ticket 33632. Patch by Neel Chauhan.
77 o Minor features (control port, stream handling):
78 - Add the stream ID argument to the event line in the ADDRMAP
79 control event. Closes ticket 40249. Patch by Neel Chauhan.
81 o Minor features (logging):
82 - Change the DoS subsystem heartbeat line format so be more clear on
83 what has been detected/rejected and which option is disabled if
84 any. Closes ticket 40308.
85 - In src/core/mainloop/mainloop.c and src/core/mainloop/connection.c,
86 put brackets around IPv6 addresses in log messages. Closes ticket
87 40232. Patch by Neel Chauhan.
89 o Minor features (performance, windows):
90 - Use SRWLocks to implement locking on Windows. Replaces the
91 critical section locking implementation with the faster SRWLocks
92 available since Windows Vista. Closes ticket 17927. Patch by
95 o Minor features (protocol, proxy support, defense in depth):
96 - Close HAProxy connections if they somehow manage to send us data
97 before we start reading. Closes another case of ticket 40017.
99 o Minor features (tests, portability):
100 - Port the hs_build_address.py test script to work with recent
101 versions of python. Closes ticket 40213. Patch from
104 o Minor bugfixes (build):
105 - Mini-report in the configure script now shows whether or not lzma
106 and zstd have been used, not just if enable flag passed in. Fixes
107 bug 40236; bugfix on 0.4.3.1-alpha.
109 o Minor bugfixes (compatibility):
110 - Fix a failure in the test cases when running on the hppa
111 architecture, along with a related test that might fail on other
112 architectures in the future. Fixes bug 40274; bugfix
115 o Minor bugfixes (directory authorities, voting):
116 - Add a new consensus method (31) to support any future changes that
117 authorities decide to make to the value of bwweightscale or
118 maxunmeasuredbw. Previously, there was a bug that prevented the
119 authorities from parsing these consensus parameters correctly under
120 most circumstances. Fixes bug 19011; bugfix on 0.2.2.10-alpha.
122 o Minor bugfixes (ipv6):
123 - Allow non-SOCKSPorts to disable IPv4, IPv6, and Prefer IPv4. Some
124 rare configs might break, but in this case you can disable
125 NoIPv4Traffic and NoIPv6Traffic as needed. Fixes bug 33607; bugfix
126 on 0.4.1.1-alpha. Patch by Neel Chauhan.
128 o Minor bugfixes (key generation):
129 - Do not require a valid torrc when using the `--keygen` argument to
130 generate a signing key. This allows us to generate keys on systems
131 or users which may not run Tor. Fixes bug 40235; bugfix on
132 0.2.7.2-alpha. Patch by Neel Chauhan.
134 o Minor bugfixes (onion services, logging):
135 - Downgrade the severity of a few rendezvous circuit-related
136 warnings from warning to info. Fixes bug 40207; bugfix on
137 0.3.2.1-alpha. Patch by Neel Chauhan.
139 o Minor bugfixes (relay):
140 - Reduce the compression level for data streaming from HIGH to LOW.
141 Fixes bug 40301; bugfix on 0.3.5.1-alpha.
143 o Code simplification and refactoring:
144 - Remove the orconn_ext_or_id_map structure and related functions.
145 Nothing outside of unit tests looks up anything in this structure.
146 Closes ticket 33383. Patch by Neel Chauhan.
148 o Code simplification and refactoring (metrics, DoS):
149 - Move the DoS subsystem into the subsys manager including its
150 configuration options. Closes ticket 40261.
152 o Removed features (relay):
153 - Because DirPorts are only used on authorities, relays no longer
154 advertise them. Similarly, self-testing for DirPorts has been
155 disabled, since an unreachable DirPort is no reason for a relay
156 not to advertise itself. (Configuring a DirPort will still work,
157 for now.) Closes ticket 40282.
160 Changes in version 0.4.5.6 - 2021-02-15
161 The Tor 0.4.5.x release series is dedicated to the memory of Karsten
162 Loesing (1979-2020), Tor developer, cypherpunk, husband, and father.
163 Karsten is best known for creating the Tor metrics portal and leading
164 the metrics team, but he was involved in Tor from the early days. For
165 example, while he was still a student he invented and implemented the
166 v2 onion service directory design, and he also served as an ambassador
167 to the many German researchers working in the anonymity field. We
168 loved him and respected him for his patience, his consistency, and his
169 welcoming approach to growing our community.
171 This release series introduces significant improvements in relay IPv6
172 address discovery, a new "MetricsPort" mechanism for relay operators
173 to measure performance, LTTng support, build system improvements to
174 help when using Tor as a static library, and significant bugfixes
175 related to Windows relay performance. It also includes numerous
176 smaller features and bugfixes.
178 Below are the changes since 0.4.4.4-rc. For a complete list of changes
179 since 0.4.4.7, see the ReleaseNotes file.
181 o Major bugfixes (IPv6, relay):
182 - Fix a bug that prevented a relay from publishing its descriptor if
183 an auto-discovered IPv6 that was found unreachable. Fixes bug
184 40279; bugfix on 0.4.5.1-alpha.
186 o Minor features (protocol versions):
187 - Stop claiming to support the "DirCache=1" subprotocol version.
188 Technically, we stopped supporting this subprotocol back in
189 0.4.5.1-alpha, but we needed to wait for the authorities to stop
190 listing it as "required" before we could drop it from the list.
193 o Minor bugfixes (logging):
194 - Avoid a spurious log message about missing subprotocol versions,
195 when the consensus that we're reading from is older than the
196 current release. Previously we had made this message nonfatal, but
197 in practice, it is never relevant when the consensus is older than
198 the current release. Fixes bug 40281; bugfix on 0.4.0.1-alpha.
200 o Minor bugfixes (metrics port):
201 - Fix a bug warning when a metrics port socket was unexpectedly
202 closed. Fixes bug 40257; bugfix on 0.4.5.1-alpha
204 o Minor bugfixes (relay):
205 - Allow relays to have a RFC1918 address if PublishServerDescriptor
206 is set to 0 and AssumeReachable is set to 1. This is to support
207 the use case of a bridge on a local network, exposed via a
208 pluggable transport. Fixes bug 40208; bugfix on 0.4.5.1-alpha.
210 o Minor bugfixes (relay, config):
211 - Fix a problem in the removal of duplicate ORPorts from the
212 internal port list when loading the config file. We were removing
213 the wrong ports, breaking valid torrc uses cases for multiple
214 ORPorts of the same address family. Fixes bug 40289; bugfix
218 Changes in version 0.4.4.7 - 2021-02-03
219 Tor 0.4.4.7 backports numerous bugfixes from later releases,
220 including one that made v3 onion services more susceptible to
221 denial-of-service attacks, and a feature that makes some kinds of
222 DoS attacks harder to perform.
224 o Major bugfixes (onion service v3, backport from 0.4.5.3-rc):
225 - Stop requiring a live consensus for v3 clients and services, and
226 allow a "reasonably live" consensus instead. This allows v3 onion
227 services to work even if the authorities fail to generate a
228 consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
231 o Major feature (exit, backport from 0.4.5.5-rc):
232 - Re-entry into the network is now denied at the Exit level to all
233 relays' ORPorts and authorities' ORPorts and DirPorts. This change
234 should help mitgate a set of denial-of-service attacks. Closes
237 o Minor feature (build system, backport from 0.4.5.4-rc):
238 - New "make lsp" command to generate the compile_commands.json file
239 used by the ccls language server. The "bear" program is needed for
240 this. Closes ticket 40227.
242 o Minor features (compilation, backport from 0.4.5.2-rc):
243 - Disable deprecation warnings when building with OpenSSL 3.0.0 or
244 later. There are a number of APIs newly deprecated in OpenSSL
245 3.0.0 that Tor still requires. (A later version of Tor will try to
246 stop depending on these APIs.) Closes ticket 40165.
248 o Minor features (crypto, backport from 0.4.5.3-rc):
249 - Fix undefined behavior on our Keccak library. The bug only
250 appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
251 and would result in wrong digests. Fixes bug 40210; bugfix on
252 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
253 weasel for diagnosing this.
255 o Minor bugfixes (compatibility, backport from 0.4.5.1-rc):
256 - Strip '\r' characters when reading text files on Unix platforms.
257 This should resolve an issue where a relay operator migrates a
258 relay from Windows to Unix, but does not change the line ending of
259 Tor's various state files to match the platform, and the CRLF line
260 endings from Windows end up leaking into other files such as the
261 extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.
263 o Minor bugfixes (compilation, backport from 0.4.5.3-rc):
264 - Fix a compilation warning about unreachable fallthrough
265 annotations when building with "--enable-all-bugs-are-fatal" on
266 some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.
268 o Minor bugfixes (SOCKS5, backport from 0.4.5.3-rc):
269 - Handle partial SOCKS5 messages correctly. Previously, our code
270 would send an incorrect error message if it got a SOCKS5 request
271 that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.
273 o Minor bugfixes (testing, backport from 0.4.5.2-alpha):
274 - Fix the `config/parse_tcp_proxy_line` test so that it works
275 correctly on systems where the DNS provider hijacks invalid
276 queries. Fixes part of bug 40179; bugfix on 0.4.3.1-alpha.
277 - Fix our Python reference-implementation for the v3 onion service
278 handshake so that it works correctly with the version of hashlib
279 provided by Python 3.9. Fixes part of bug 40179; bugfix
281 - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
282 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.
285 Changes in version 0.4.3.8 - 2021-02-03
286 Tor 0.4.3.8 backports numerous bugfixes from later releases,
287 including one that made v3 onion services more susceptible to
288 denial-of-service attacks, and a feature that makes some kinds of
289 DoS attacks harder to perform.
291 Note that this is, in all likelihood, the last release of Tor 0.4.3.x,
292 which will reach end-of-life on 15 Feb 2021.
294 o Major bugfixes (onion service v3, backport from 0.4.5.3-rc):
295 - Stop requiring a live consensus for v3 clients and services, and
296 allow a "reasonably live" consensus instead. This allows v3 onion
297 services to work even if the authorities fail to generate a
298 consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
301 o Major bugfixes (stats, onion services, backport from 0.4.4.5):
302 - Fix a bug where we were undercounting the Tor network's total
303 onion service traffic, by ignoring any traffic originating from
304 clients. Now we count traffic from both clients and services.
305 Fixes bug 40117; bugfix on 0.2.6.2-alpha.
307 o Major feature (exit, backport from 0.4.5.5-rc):
308 - Re-entry into the network is now denied at the Exit level to all
309 relays' ORPorts and authorities' ORPorts and DirPorts. This change
310 should help mitgate a set of denial-of-service attacks. Closes
313 o Minor feature (build system, backport from 0.4.5.4-rc):
314 - New "make lsp" command to generate the compile_commands.json file
315 used by the ccls language server. The "bear" program is needed for
316 this. Closes ticket 40227.
318 o Minor features (compilation, backport from 0.4.5.2-rc):
319 - Disable deprecation warnings when building with OpenSSL 3.0.0 or
320 later. There are a number of APIs newly deprecated in OpenSSL
321 3.0.0 that Tor still requires. (A later version of Tor will try to
322 stop depending on these APIs.) Closes ticket 40165.
324 o Minor features (crypto, backport from 0.4.5.3-rc):
325 - Fix undefined behavior on our Keccak library. The bug only
326 appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
327 and would result in wrong digests. Fixes bug 40210; bugfix on
328 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
329 weasel for diagnosing this.
331 o Minor bugfixes (compatibility, backport from 0.4.5.1-rc):
332 - Strip '\r' characters when reading text files on Unix platforms.
333 This should resolve an issue where a relay operator migrates a
334 relay from Windows to Unix, but does not change the line ending of
335 Tor's various state files to match the platform, and the CRLF line
336 endings from Windows end up leaking into other files such as the
337 extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.
339 o Minor bugfixes (compilation, backport from 0.4.5.1-rc):
340 - Resolve a compilation warning that could occur in
341 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
343 o Minor bugfixes (compilation, backport from 0.4.5.3-rc):
344 - Fix a compilation warning about unreachable fallthrough
345 annotations when building with "--enable-all-bugs-are-fatal" on
346 some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.
348 o Minor bugfixes (SOCKS5, backport from 0.4.5.3-rc):
349 - Handle partial SOCKS5 messages correctly. Previously, our code
350 would send an incorrect error message if it got a SOCKS5 request
351 that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.
353 o Minor bugfixes (testing, backport from 0.4.5.2-alpha):
354 - Fix the `config/parse_tcp_proxy_line` test so that it works
355 correctly on systems where the DNS provider hijacks invalid
356 queries. Fixes part of bug 40179; bugfix on 0.4.3.1-alpha.
357 - Fix our Python reference-implementation for the v3 onion service
358 handshake so that it works correctly with the version of hashlib
359 provided by Python 3.9. Fixes part of bug 40179; bugfix
361 - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
362 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.
365 Changes in version 0.3.5.13 - 2020-02-03
366 Tor 0.3.5.13 backports numerous bugfixes from later releases,
367 including one that made v3 onion services more susceptible to
368 denial-of-service attacks, and a feature that makes some kinds of
369 DoS attacks harder to perform.
371 o Major bugfixes (onion service v3, backport from 0.4.5.3-rc):
372 - Stop requiring a live consensus for v3 clients and services, and
373 allow a "reasonably live" consensus instead. This allows v3 onion
374 services to work even if the authorities fail to generate a
375 consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
378 o Major bugfixes (stats, onion services, backport from 0.4.4.5):
379 - Fix a bug where we were undercounting the Tor network's total
380 onion service traffic, by ignoring any traffic originating from
381 clients. Now we count traffic from both clients and services.
382 Fixes bug 40117; bugfix on 0.2.6.2-alpha.
384 o Major feature (exit, backport from 0.4.5.5-rc):
385 - Re-entry into the network is now denied at the Exit level to all
386 relays' ORPorts and authorities' ORPorts and DirPorts. This change
387 should help mitgate a set of denial-of-service attacks. Closes
390 o Minor feature (build system, backport from 0.4.5.4-rc):
391 - New "make lsp" command to generate the compile_commands.json file
392 used by the ccls language server. The "bear" program is needed for
393 this. Closes ticket 40227.
395 o Minor features (compilation, backport from 0.4.5.2-rc):
396 - Disable deprecation warnings when building with OpenSSL 3.0.0 or
397 later. There are a number of APIs newly deprecated in OpenSSL
398 3.0.0 that Tor still requires. (A later version of Tor will try to
399 stop depending on these APIs.) Closes ticket 40165.
401 o Minor features (crypto, backport from 0.4.5.3-rc):
402 - Fix undefined behavior on our Keccak library. The bug only
403 appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
404 and would result in wrong digests. Fixes bug 40210; bugfix on
405 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
406 weasel for diagnosing this.
408 o Minor bugfixes (compatibility, backport from 0.4.5.1-rc):
409 - Strip '\r' characters when reading text files on Unix platforms.
410 This should resolve an issue where a relay operator migrates a
411 relay from Windows to Unix, but does not change the line ending of
412 Tor's various state files to match the platform, and the CRLF line
413 endings from Windows end up leaking into other files such as the
414 extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.
416 o Minor bugfixes (compilation, backport from 0.4.5.1-rc):
417 - Resolve a compilation warning that could occur in
418 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
420 o Minor bugfixes (compilation, backport from 0.4.5.3-rc):
421 - Fix a compilation warning about unreachable fallthrough
422 annotations when building with "--enable-all-bugs-are-fatal" on
423 some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.
425 o Minor bugfixes (SOCKS5, backport from 0.4.5.3-rc):
426 - Handle partial SOCKS5 messages correctly. Previously, our code
427 would send an incorrect error message if it got a SOCKS5 request
428 that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.
430 o Minor bugfixes (testing, backport from 0.4.5.2-alpha):
431 - Fix our Python reference-implementation for the v3 onion service
432 handshake so that it works correctly with the version of hashlib
433 provided by Python 3.9. Fixes part of bug 40179; bugfix
435 - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
436 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.
439 Changes in version 0.4.5.5-rc - 2021-02-01
440 Tor 0.4.5.5-rc is the third release candidate in its series. We're
441 coming closer and closer to a stable release series. This release
442 fixes an annoyance with address detection code, and somewhat mitigates
443 an ongoing denial-of-service attack.
445 We anticipate no more code changes between this and the stable
446 release, though of course that could change.
448 o Major feature (exit):
449 - Re-entry into the network is now denied at the Exit level to all
450 relays' ORPorts and authorities' ORPorts and DirPorts. This change
451 should help mitgate a set of denial-of-service attacks. Closes
454 o Minor bugfixes (relay, configuration):
455 - Don't attempt to discover our address (IPv4 or IPv6) if no ORPort
456 for it can be found in the configuration. Fixes bug 40254; bugfix
460 Changes in version 0.4.5.4-rc - 2021-01-22
461 Tor 0.4.5.4-rc is the second release candidate in its series. It fixes
462 several bugs present in previous releases.
464 We expect that the stable release will be the same, or almost the
465 same, as this release candidate, unless serious bugs are found.
467 o Major bugfixes (authority, IPv6):
468 - Do not consider multiple relays in the same IPv6 /64 network to be
469 sybils. Fixes bug 40243; bugfix on 0.4.5.1-alpha.
471 o Major bugfixes (directory cache, performance, windows):
472 - Limit the number of items in the consensus diff cache to 64 on
473 Windows. We hope this will mitigate an issue where Windows relay
474 operators reported Tor using 100% CPU, while we investigate better
475 solutions. Fixes bug 24857; bugfix on 0.3.1.1-alpha.
477 o Minor feature (build system):
478 - New "make lsp" command to generate the compile_commands.json file
479 used by the ccls language server. The "bear" program is needed for
480 this. Closes ticket 40227.
482 o Minor features (authority, logging):
483 - Log more information for directory authority operators during the
484 consensus voting process, and while processing relay descriptors.
486 - Reject obsolete router/extrainfo descriptors earlier and more
487 quietly, to avoid spamming the logs. Fixes bug 40238; bugfix
490 o Minor bugfixes (compilation):
491 - Fix another warning about unreachable fallthrough annotations when
492 building with "--enable-all-bugs-are-fatal" on some compilers.
493 Fixes bug 40241; bugfix on 0.4.5.3-rc.
494 - Change the linker flag ordering in our library search code so that
495 it works for compilers that need the libraries to be listed in the
496 right order. Fixes bug 33624; bugfix on 0.1.1.0-alpha.
498 o Minor bugfixes (config, bridge):
499 - Don't initiate a connection to a bridge configured to use a
500 missing transport. This change reverts an earlier fix that would
501 try to avoid such situations during configuration chcecking, but
502 which doesn't work with DisableNetwork. Fixes bug 40106; bugfix
505 o Minor bugfixes (onion services):
506 - Avoid a non-fatal assertion in certain edge-cases when
507 establishing a circuit to an onion service. Fixes bug 32666;
508 bugfix on 0.3.0.3-alpha.
510 o Minor bugfixes (relay):
511 - If we were unable to build our descriptor, don't mark it as having
512 been advertised. Also remove an harmless BUG(). Fixes bug 40231;
513 bugfix on 0.4.5.1-alpha.
516 Changes in version 0.4.5.3-rc - 2021-01-12
517 Tor 0.4.5.3-rc is the first release candidate in its series. It fixes
518 several bugs, including one that broke onion services on certain older
519 ARM CPUs, and another that made v3 onion services less reliable.
521 Though we anticipate that we'll be doing a bit more clean-up between
522 now and the stable release, we expect that our remaining changes will
523 be fairly simple. There will be at least one more release candidate
524 before 0.4.5.x is stable.
526 o Major bugfixes (onion service v3):
527 - Stop requiring a live consensus for v3 clients and services, and
528 allow a "reasonably live" consensus instead. This allows v3 onion
529 services to work even if the authorities fail to generate a
530 consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
533 o Minor features (crypto):
534 - Fix undefined behavior on our Keccak library. The bug only
535 appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
536 and would result in wrong digests. Fixes bug 40210; bugfix on
537 0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
538 weasel for diagnosing this.
540 o Minor features (documentation):
541 - Mention the "!badexit" directive that can appear in an authority's
542 approved-routers file, and update the description of the
543 "!invalid" directive. Closes ticket 40188.
545 o Minor bugfixes (compilation):
546 - Fix a compilation warning about unreachable fallthrough
547 annotations when building with "--enable-all-bugs-are-fatal" on
548 some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.
549 - Fix the "--enable-static-tor" switch to properly set the "-static"
550 compile option onto the tor binary only. Fixes bug 40111; bugfix
553 o Minor bugfixes (config, bridge):
554 - Really fix the case where torrc has a missing ClientTransportPlugin
555 but is configured with a Bridge line and UseBridges. Previously,
556 we didn't look at the managed proxy list and thus would fail for
557 the "exec" case. Fixes bug 40106; bugfix on 0.4.5.1-alpha.
559 o Minor bugfixes (logging, relay):
560 - Log our address as reported by the directory authorities, if none
561 was configured or detected before. Fixes bug 40201; bugfix
563 - When a launching bandwidth testing circuit, don't incorrectly call
564 it a reachability test, or trigger a "CHECKING_REACHABILITY"
565 control event. Fixes bug 40205; bugfix on 0.4.5.1-alpha.
567 o Minor bugfixes (relay, statistics):
568 - Report the correct connection statistics in our extrainfo
569 documents. Previously there was a problem in the file loading
570 function which would wrongly truncate a state file, causing the
571 wrong information to be reported. Fixes bug 40226; bugfix
574 o Minor bugfixes (SOCKS5):
575 - Handle partial SOCKS5 messages correctly. Previously, our code
576 would send an incorrect error message if it got a SOCKS5 request
577 that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.
580 Changes in version 0.4.5.2-alpha - 2020-11-23
581 Tor 0.4.5.2-alpha is the second alpha release in the 0.4.5.x series.
582 It fixes several bugs present in earlier releases, including one that
583 made it impractical to run relays on Windows. It also adds a few small
584 safety features to improve Tor's behavior in the presence of strange
585 compile-time options, misbehaving proxies, and future versions
588 o Major bugfixes (relay, windows):
589 - Fix a bug in our implementation of condition variables on Windows.
590 Previously, a relay on Windows would use 100% CPU after running
591 for some time. Because of this change, Tor now require Windows
592 Vista or later to build and run. Fixes bug 30187; bugfix on
593 0.2.6.3-alpha. (This bug became more serious in 0.3.1.1-alpha with
594 the introduction of consensus diffs.) Patch by Daniel Pinto.
596 o Minor features (compilation):
597 - Disable deprecation warnings when building with OpenSSL 3.0.0 or
598 later. There are a number of APIs newly deprecated in OpenSSL
599 3.0.0 that Tor still requires. (A later version of Tor will try to
600 stop depending on these APIs.) Closes ticket 40165.
602 o Minor features (protocol, proxy support, defense in depth):
603 - Respond more deliberately to misbehaving proxies that leave
604 leftover data on their connections, so as to make Tor even less
605 likely to allow the proxies to pass their data off as having come
606 from a relay. Closes ticket 40017.
608 o Minor features (safety):
609 - Log a warning at startup if Tor is built with compile-time options
610 that are likely to make it less stable or reliable. Closes
613 o Minor bugfixes (circuit, handshake):
614 - In the v3 handshaking code, use connection_or_change_state() to
615 change the state. Previously, we changed the state directly, but
616 this did not pass the state change to the pubsub or channel
617 objects, potentially leading to bugs. Fixes bug 32880; bugfix on
618 0.2.3.6-alpha. Patch by Neel Chauhan.
620 o Minor bugfixes (compilation):
621 - Use the correct 'ranlib' program when building libtor.a.
622 Previously we used the default ranlib, which broke some kinds of
623 cross-compilation. Fixes bug 40172; bugfix on 0.4.5.1-alpha.
624 - Remove a duplicate typedef in metrics_store.c. Fixes bug 40177;
625 bugfix on 0.4.5.1-alpha.
626 - When USDT tracing is enabled, and STAP_PROBEV() is missing, don't
627 attempt to build. Linux supports that macro but not the BSDs.
628 Fixes bug 40174; bugfix on 0.4.5.1-alpha.
630 o Minor bugfixes (configuration):
631 - Exit Tor on a misconfiguration when the Bridge line is configured
632 to use a transport but no corresponding ClientTransportPlugin can
633 be found. Prior to this fix, Tor would attempt to connect to the
634 bridge directly without using the transport, making it easier for
635 adversaries to notice the bridge. Fixes bug 25528; bugfix
637 - Fix an issue where an ORPort was compared with other kinds of
638 ports, when it should have been only checked against other
639 ORPorts. This bug would lead to "DirPort auto" getting ignored.
640 Fixes bug 40195; bugfix on 0.4.5.1-alpha.
641 - Fix a bug where a second non-ORPort with a variant family (ex:
642 SocksPort [::1]:9050) would be ignored due to a configuration
643 parsing error. Fixes bug 40183; bugfix on 0.4.5.1-alpha.
645 o Minor bugfixes (crash, relay, signing key):
646 - Avoid assertion failures when we run Tor from the command line
647 with `--key-expiration sign`, but an ORPort is not set. Fixes bug
648 40015; bugfix on 0.3.2.1-alpha. Patch by Neel Chauhan.
650 o Minor bugfixes (logging):
651 - Remove trailing whitespace from control event log messages. Fixes
652 bug 32178; bugfix on 0.1.1.1-alpha. Based on a patch by
654 - Turn warning-level log message about SENDME failure into a debug-
655 level message. (This event can happen naturally, and is no reason
656 for concern). Fixes bug 40142; bugfix on 0.4.1.1-alpha.
658 o Minor bugfixes (relay, address discovery):
659 - Don't trigger an IP change when no new valid IP can be found.
660 Fixes bug 40071; bugfix on 0.4.5.1-alpha.
661 - When attempting to discover our IP, use a simple test circuit,
662 rather than a descriptor fetch: the same address information is
663 present in NETINFO cells, and is better authenticated there. Fixes
664 bug 40071; bugfix on 0.4.5.1-alpha.
666 o Minor bugfixes (testing):
667 - Fix the `config/parse_tcp_proxy_line` test so that it works
668 correctly on systems where the DNS provider hijacks invalid
669 queries. Fixes part of bug 40179; bugfix on 0.4.3.1-alpha.
670 - Fix unit tests that used newly generated list of routers so that
671 they check them with respect to the date when they were generated,
672 not with respect to the current time. Fixes bug 40187; bugfix
674 - Fix our Python reference-implementation for the v3 onion service
675 handshake so that it works correctly with the version of hashlib
676 provided by Python 3.9. Fixes part of bug 40179; bugfix
678 - Fix the `tortls/openssl/log_one_error` test to work with OpenSSL
679 3.0.0. Fixes bug 40170; bugfix on 0.2.8.1-alpha.
681 o Removed features (controller):
682 - Remove the "GETINFO network-status" controller command. It has
683 been deprecated since 0.3.1.1-alpha. Closes ticket 22473.
686 Changes in version 0.4.4.6 - 2020-11-12
687 Tor 0.4.4.6 is the second stable release in the 0.4.4.x series. It
688 backports fixes from later releases, including a fix for TROVE-2020-
689 005, a security issue that could be used, under certain cases, by an
690 adversary to observe traffic patterns on a limited number of circuits
691 intended for a different relay.
693 o Major bugfixes (security, backport from 0.4.5.1-alpha):
694 - When completing a channel, relays now check more thoroughly to
695 make sure that it matches any pending circuits before attaching
696 those circuits. Previously, address correctness and Ed25519
697 identities were not checked in this case, but only when extending
698 circuits on an existing channel. Fixes bug 40080; bugfix on
699 0.2.7.2-alpha. Resolves TROVE-2020-005.
701 o Minor features (directory authorities, backport from 0.4.5.1-alpha):
702 - Authorities now list a different set of protocols as required and
703 recommended. These lists have been chosen so that only truly
704 recommended and/or required protocols are included, and so that
705 clients using 0.2.9 or later will continue to work (even though
706 they are not supported), whereas only relays running 0.3.5 or
707 later will meet the requirements. Closes ticket 40162.
708 - Make it possible to specify multiple ConsensusParams torrc lines.
709 Now directory authority operators can for example put the main
710 ConsensusParams config in one torrc file and then add to it from a
711 different torrc file. Closes ticket 40164.
713 o Minor features (subprotocol versions, backport from 0.4.5.1-alpha):
714 - Tor no longer allows subprotocol versions larger than 63.
715 Previously version numbers up to UINT32_MAX were allowed, which
716 significantly complicated our code. Implements proposal 318;
719 o Minor features (tests, v2 onion services, backport from 0.4.5.1-alpha):
720 - Fix a rendezvous cache unit test that was triggering an underflow
721 on the global rend cache allocation. Fixes bug 40125; bugfix
723 - Fix another rendezvous cache unit test that was triggering an
724 underflow on the global rend cache allocation. Fixes bug 40126;
725 bugfix on 0.2.8.1-alpha.
727 o Minor bugfixes (compilation, backport from 0.4.5.1-alpha):
728 - Fix compiler warnings that would occur when building with
729 "--enable-all-bugs-are-fatal" and "--disable-module-relay" at the
730 same time. Fixes bug 40129; bugfix on 0.4.4.1-alpha.
731 - Resolve a compilation warning that could occur in
732 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
734 o Minor bugfixes (logging, backport from 0.4.5.1-alpha):
735 - Remove a debug logging statement that uselessly spammed the logs.
736 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
738 o Minor bugfixes (relay configuration, crash, backport from 0.4.5.1-alpha):
739 - Avoid a fatal assert() when failing to create a listener
740 connection for an address that was in use. Fixes bug 40073; bugfix
743 o Minor bugfixes (v2 onion services, backport from 0.4.5.1-alpha):
744 - For HSFETCH commands on v2 onion services addresses, check the
745 length of bytes decoded, not the base32 length. Fixes bug 34400;
746 bugfix on 0.4.1.1-alpha. Patch by Neel Chauhan.
749 Changes in version 0.4.3.7 - 2020-11-12
750 Tor 0.4.3.7 backports several bugfixes from later releases. It
751 includes a fix for TROVE-2020-005, a security issue that could be
752 used, under certain cases, by an adversary to observe traffic patterns
753 on a limited number of circuits intended for a different relay.
755 Please be aware that support for the 0.4.3.x series will end on 15
756 February 2021. Please upgrade to 0.4.4.x or 0.4.5.x before then, or
757 downgrade to 0.3.5.x, which will be supported until at least 1
760 o Major features (fallback directory list, backport form 0.4.4.3-alpha):
761 - Replace the 148 fallback directories originally included in Tor
762 0.4.1.4-rc (of which around 105 are still functional) with a list
763 of 144 fallbacks generated in July 2020. Closes ticket 40061.
765 o Major bugfixes (security, backport from 0.4.5.1-alpha):
766 - When completing a channel, relays now check more thoroughly to
767 make sure that it matches any pending circuits before attaching
768 those circuits. Previously, address correctness and Ed25519
769 identities were not checked in this case, but only when extending
770 circuits on an existing channel. Fixes bug 40080; bugfix on
771 0.2.7.2-alpha. Resolves TROVE-2020-005.
773 o Major bugfixes (NSS, backport from 0.4.4.3-alpha):
774 - When running with NSS enabled, make sure that NSS knows to expect
775 nonblocking sockets. Previously, we set our TCP sockets as
776 nonblocking, but did not tell NSS, which in turn could lead to
777 unexpected blocking behavior. Fixes bug 40035; bugfix
780 o Minor features (security, backport from 0.4.4.4-rc):
781 - Channels using obsolete versions of the Tor link protocol are no
782 longer allowed to circumvent address-canonicity checks. (This is
783 only a minor issue, since such channels have no way to set ed25519
784 keys, and therefore should always be rejected for circuits that
785 specify ed25519 identities.) Closes ticket 40081.
787 o Minor features (subprotocol versions, backport from 0.4.5.1-alpha):
788 - Tor no longer allows subprotocol versions larger than 63.
789 Previously version numbers up to UINT32_MAX were allowed, which
790 significantly complicated our code. Implements proposal 318;
793 o Minor features (tests, backport from 0.4.4.5):
794 - Our "make check" target now runs the unit tests in 8 parallel
795 chunks. Doing this speeds up hardened CI builds by more than a
796 factor of two. Closes ticket 40098.
798 o Minor features (tests, v2 onion services, backport from 0.4.5.1-alpha):
799 - Fix a rendezvous cache unit test that was triggering an underflow
800 on the global rend cache allocation. Fixes bug 40125; bugfix
802 - Fix another rendezvous cache unit test that was triggering an
803 underflow on the global rend cache allocation. Fixes bug 40126;
804 bugfix on 0.2.8.1-alpha.
806 o Minor bugfixes (correctness, buffers, backport from 0.4.4.4-rc):
807 - Fix a correctness bug that could cause an assertion failure if we
808 ever tried using the buf_move_all() function with an empty input
809 buffer. As far as we know, no released versions of Tor do this.
810 Fixes bug 40076; bugfix on 0.3.3.1-alpha.
812 o Minor bugfixes (logging, backport from 0.4.5.1-alpha):
813 - Remove a debug logging statement that uselessly spammed the logs.
814 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
816 o Minor bugfixes (rate limiting, bridges, pluggable transports, backport from 0.4.4.4-rc):
817 - On a bridge, treat all connections from an ExtORPort as remote by
818 default for the purposes of rate-limiting. Previously, bridges
819 would treat the connection as local unless they explicitly
820 received a "USERADDR" command. ExtORPort connections still count
821 as local if there is a USERADDR command with an explicit local
822 address. Fixes bug 33747; bugfix on 0.2.5.1-alpha.
824 o Minor bugfixes (relay configuration, crash, backport from 0.4.5.1-alpha):
825 - Avoid a fatal assert() when failing to create a listener
826 connection for an address that was in use. Fixes bug 40073; bugfix
829 o Minor bugfixes (relay, usability, backport from 0.4.4.3-alpha):
830 - Adjust the rules for when to warn about having too many
831 connections to other relays. Previously we'd tolerate up to 1.5
832 connections per relay on average. Now we tolerate more connections
833 for directory authorities, and raise the number of total
834 connections we need to see before we warn. Fixes bug 33880; bugfix
837 o Minor bugfixes (tests, 0.4.4.5):
838 - Fix the behavior of the rend_cache/clean_v2_descs_as_dir when run
839 on its own. Previously, it would exit with an error. Fixes bug
840 40099; bugfix on 0.2.8.1-alpha.
842 o Minor bugfixes (v2 onion services, backport from 0.4.5.1-alpha):
843 - For HSFETCH commands on v2 onion services addresses, check the
844 length of bytes decoded, not the base32 length. Fixes bug 34400;
845 bugfix on 0.4.1.1-alpha. Patch by Neel Chauhan.
847 o Minor bugfixes (windows, backport from 0.4.4.4-rc):
848 - Fix a bug that prevented Tor from starting if its log file grew
849 above 2GB. Fixes bug 31036; bugfix on 0.2.1.8-alpha.
851 o Deprecated features (onion service v2, backport form 0.4.4.2-alpha):
852 - Add a deprecation warning for version 2 onion services. Closes
855 o Removed features (backport from 0.4.4.3-alpha):
856 - Our "check-local" test target no longer tries to use the
857 Coccinelle semantic patching tool parse all the C files. While it
858 is a good idea to try to make sure Coccinelle works on our C
859 before we run a Coccinelle patch, doing so on every test run has
860 proven to be disruptive. You can still run this tool manually with
861 "make check-cocci". Closes ticket 40030. ticket 40030.
864 Changes in version 0.3.5.12 - 2020-11-12
865 Tor 0.4.3.7 backports several bugfixes from later releases. It
866 includes a fix for TROVE-2020-005, a security issue that could be
867 used, under certain cases, by an adversary to observe traffic patterns
868 on a limited number of circuits intended for a different relay.
870 o Major features (fallback directory list, backport form 0.4.4.3-alpha):
871 - Replace the 148 fallback directories originally included in Tor
872 0.4.1.4-rc (of which around 105 are still functional) with a list
873 of 144 fallbacks generated in July 2020. Closes ticket 40061.
875 o Major bugfixes (security, backport from 0.4.5.1-alpha):
876 - When completing a channel, relays now check more thoroughly to
877 make sure that it matches any pending circuits before attaching
878 those circuits. Previously, address correctness and Ed25519
879 identities were not checked in this case, but only when extending
880 circuits on an existing channel. Fixes bug 40080; bugfix on
881 0.2.7.2-alpha. Resolves TROVE-2020-005.
883 o Major bugfixes (NSS, backport from 0.4.4.3-alpha):
884 - When running with NSS enabled, make sure that NSS knows to expect
885 nonblocking sockets. Previously, we set our TCP sockets as
886 nonblocking, but did not tell NSS, which in turn could lead to
887 unexpected blocking behavior. Fixes bug 40035; bugfix
890 o Minor features (security, backport from 0.4.4.4-rc):
891 - Channels using obsolete versions of the Tor link protocol are no
892 longer allowed to circumvent address-canonicity checks. (This is
893 only a minor issue, since such channels have no way to set ed25519
894 keys, and therefore should always be rejected for circuits that
895 specify ed25519 identities.) Closes ticket 40081.
897 o Minor features (debugging, directory system):
898 - Don't crash when we find a non-guard with a guard-fraction value
899 set. Instead, log a bug warning, in an attempt to figure out how
900 this happened. Diagnostic for ticket 32868.
902 o Minor features (subprotocol versions, backport from 0.4.5.1-alpha):
903 - Tor no longer allows subprotocol versions larger than 63.
904 Previously version numbers up to UINT32_MAX were allowed, which
905 significantly complicated our code. Implements proposal 318;
908 o Minor features (tests, backport from 0.4.4.5):
909 - Our "make check" target now runs the unit tests in 8 parallel
910 chunks. Doing this speeds up hardened CI builds by more than a
911 factor of two. Closes ticket 40098.
913 o Minor features (tests, v2 onion services, backport from 0.4.5.1-alpha):
914 - Fix a rendezvous cache unit test that was triggering an underflow
915 on the global rend cache allocation. Fixes bug 40125; bugfix
917 - Fix another rendezvous cache unit test that was triggering an
918 underflow on the global rend cache allocation. Fixes bug 40126;
919 bugfix on 0.2.8.1-alpha.
921 o Minor bugfixes (correctness, buffers, backport from 0.4.4.4-rc):
922 - Fix a correctness bug that could cause an assertion failure if we
923 ever tried using the buf_move_all() function with an empty input
924 buffer. As far as we know, no released versions of Tor do this.
925 Fixes bug 40076; bugfix on 0.3.3.1-alpha.
927 o Minor bugfixes (logging, backport from 0.4.5.1-alpha):
928 - Remove a debug logging statement that uselessly spammed the logs.
929 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
931 o Minor bugfixes (rate limiting, bridges, pluggable transports, backport from 0.4.4.4-rc):
932 - On a bridge, treat all connections from an ExtORPort as remote by
933 default for the purposes of rate-limiting. Previously, bridges
934 would treat the connection as local unless they explicitly
935 received a "USERADDR" command. ExtORPort connections still count
936 as local if there is a USERADDR command with an explicit local
937 address. Fixes bug 33747; bugfix on 0.2.5.1-alpha.
939 o Minor bugfixes (relay configuration, crash, backport from 0.4.5.1-alpha):
940 - Avoid a fatal assert() when failing to create a listener
941 connection for an address that was in use. Fixes bug 40073; bugfix
944 o Minor bugfixes (relay, usability, backport from 0.4.4.3-alpha):
945 - Adjust the rules for when to warn about having too many
946 connections to other relays. Previously we'd tolerate up to 1.5
947 connections per relay on average. Now we tolerate more connections
948 for directory authorities, and raise the number of total
949 connections we need to see before we warn. Fixes bug 33880; bugfix
952 o Minor bugfixes (relays, backport from 0.4.4.1-alpha):
953 - Stop advertising incorrect IPv6 ORPorts in relay and bridge
954 descriptors, when the IPv6 port was configured as "auto". Fixes
955 bug 32588; bugfix on 0.2.3.9-alpha.
957 o Minor bugfixes (tests, 0.4.4.5):
958 - Fix the behavior of the rend_cache/clean_v2_descs_as_dir when run
959 on its own. Previously, it would exit with an error. Fixes bug
960 40099; bugfix on 0.2.8.1-alpha.
962 o Minor bugfixes (windows, backport from 0.4.4.4-rc):
963 - Fix a bug that prevented Tor from starting if its log file grew
964 above 2GB. Fixes bug 31036; bugfix on 0.2.1.8-alpha.
966 o Deprecated features (onion service v2, backport form 0.4.4.2-alpha):
967 - Add a deprecation warning for version 2 onion services. Closes
971 Changes in version 0.4.5.1-alpha - 2020-11-01
972 Tor 0.4.5.1-alpha is the first alpha release in the 0.4.5.x series. It
973 improves support for IPv6, address discovery and self-testing, code
976 This release also fixes TROVE-2020-005, a security issue that could be
977 used, under certain cases, by an adversary to observe traffic patterns
978 on a limited number of circuits intended for a different relay. To
979 mount this attack, the adversary would need to actively extend
980 circuits to an incorrect address, as well as compromise a relay's
981 legacy RSA-1024 key. We'll be backporting this fix to other release
982 series soon, after it has had some testing.
984 Here are the changes since 0.4.4.5.
986 o Major features (build):
987 - When building Tor, first link all object files into a single
988 static library. This may help with embedding Tor in other
989 programs. Note that most Tor functions do not constitute a part of
990 a stable or supported API: only those functions in tor_api.h
991 should be used if embedding Tor. Closes ticket 40127.
993 o Major features (metrics):
994 - Introduce a new MetricsPort which exposes, through an HTTP
995 interface, a series of metrics that tor collects at runtime. At
996 the moment, the only supported output format is Prometheus data
997 model. Closes ticket 40063. See the manual page for more
998 information and security considerations.
999 o Major features (relay, IPv6):
1000 - The torrc option Address now supports IPv6. This unifies our
1001 address discovery interface to support IPv4, IPv6, and hostnames.
1002 Closes ticket 33233.
1003 - Launch IPv4 and IPv6 ORPort self-test circuits on relays and
1004 bridges. Closes ticket 33222.
1005 - Relays now automatically bind on IPv6 for their ORPort, unless
1006 specified otherwise with the IPv4Only flag. Closes ticket 33246.
1007 - When a relay with IPv6 support is told to open a connection to
1008 another relay, and the extend cell lists both IPv4 and IPv6
1009 addresses, the first relay now picks randomly which address to
1010 use. Closes ticket 33220.
1011 - Relays now track their IPv6 ORPort reachability separately from
1012 the reachability of their IPv4 ORPort. They will not publish a
1013 descriptor unless _both_ ports appear to be externally reachable.
1014 Closes ticket 34067.
1016 o Major features (tracing):
1017 - Add event-tracing library support for USDT and LTTng-UST, and a
1018 few tracepoints in the circuit subsystem. More will come
1019 incrementally. This feature is compiled out by default: it needs
1020 to be enabled at configure time. See documentation in
1021 doc/HACKING/Tracing.md. Closes ticket 32910.
1023 o Major bugfixes (security):
1024 - When completing a channel, relays now check more thoroughly to
1025 make sure that it matches any pending circuits before attaching
1026 those circuits. Previously, address correctness and Ed25519
1027 identities were not checked in this case, but only when extending
1028 circuits on an existing channel. Fixes bug 40080; bugfix on
1029 0.2.7.2-alpha. Resolves TROVE-2020-005.
1031 o Major bugfixes (TLS, buffer):
1032 - When attempting to read N bytes on a TLS connection, really try to
1033 read all N bytes. Previously, Tor would stop reading after the
1034 first TLS record, which can be smaller than the N bytes requested,
1035 and not check for more data until the next mainloop event. Fixes
1036 bug 40006; bugfix on 0.1.0.5-rc.
1038 o Minor features (address discovery):
1039 - If no Address statements are found, relays now prioritize guessing
1040 their address by looking at the local interface instead of the
1041 local hostname. If the interface address can't be found, the local
1042 hostname is used. Closes ticket 33238.
1044 o Minor features (admin tools):
1045 - Add a new --format argument to -key-expiration option to allow
1046 specifying the time format of the expiration date. Adds Unix
1047 timestamp format support. Patch by Daniel Pinto. Closes
1050 o Minor features (bootstrap reporting):
1051 - When reporting bootstrapping status on a relay, do not consider
1052 connections that have never been the target of an origin circuit.
1053 Previously, all connection failures were treated as potential
1054 bootstrapping failures, including connections that had been opened
1055 because of client requests. Closes ticket 25061.
1057 o Minor features (build):
1058 - When running the configure script, try to detect version
1059 mismatches between the OpenSSL headers and libraries, and suggest
1060 that the user should try "--with-openssl-dir". Closes 40138.
1061 - If the configure script has given any warnings, remind the user
1062 about them at the end of the script. Related to 40138.
1064 o Minor features (configuration):
1065 - Allow using wildcards (* and ?) with the %include option on
1066 configuration files. Closes ticket 25140. Patch by Daniel Pinto.
1067 - Allow the configuration options EntryNodes, ExcludeNodes,
1068 ExcludeExitNodes, ExitNodes, MiddleNodes, HSLayer2Nodes and
1069 HSLayer3Nodes to be specified multiple times. Closes ticket 28361.
1070 Patch by Daniel Pinto.
1072 o Minor features (control port):
1073 - Add a DROPTIMEOUTS command to drop circuit build timeout history
1074 and reset the current timeout. Closes ticket 40002.
1075 - When a stream enters the AP_CONN_STATE_CONTROLLER_WAIT status,
1076 send a control port event. Closes ticket 32190. Patch by
1078 - Introduce GETINFO "stats/ntor/{assigned/requested}" and
1079 "stats/tap/{assigned/requested}" to get the NTor and TAP circuit
1080 onion handshake counts respectively. Closes ticket 28279. Patch by
1083 o Minor features (control port, IPv6):
1084 - Tor relays now try to report to the controller when they are
1085 launching an IPv6 self-test. Closes ticket 34068.
1086 - Introduce "GETINFO address/v4" and "GETINFO address/v6" in the
1087 control port to fetch the Tor host's respective IPv4 or IPv6
1088 address. We keep "GETINFO address" for backwards-compatibility.
1089 Closes ticket 40039. Patch by Neel Chauhan.
1091 o Minor features (directory authorities):
1092 - Authorities now list a different set of protocols as required and
1093 recommended. These lists have been chosen so that only truly
1094 recommended and/or required protocols are included, and so that
1095 clients using 0.2.9 or later will continue to work (even though
1096 they are not supported), whereas only relays running 0.3.5 or
1097 later will meet the requirements. Closes ticket 40162.
1098 - Add a new consensus method 30 that removes the unnecessary "="
1099 padding from ntor-onion-key. Closes ticket 7869. Patch by
1101 - Directory authorities now reject descriptors from relays running
1102 Tor versions from the obsolete 0.4.1 series. Resolves ticket
1103 34357. Patch by Neel Chauhan.
1104 - Make it possible to specify multiple ConsensusParams torrc lines.
1105 Now directory authority operators can for example put the main
1106 ConsensusParams config in one torrc file and then add to it from a
1107 different torrc file. Closes ticket 40164.
1108 - The AssumeReachable option no longer stops directory authorities
1109 from checking whether other relays are running. A new
1110 AuthDirTestReachability option can be used to disable these
1111 checks. Closes ticket 34445.
1112 - When looking for possible Sybil attacks, also consider IPv6
1113 addresses. Two routers are considered to have "the same" address
1114 by this metric if they are in the same /64 network. Patch from
1115 Maurice Pibouin. Closes ticket 7193.
1117 o Minor features (directory authorities, IPv6):
1118 - Make authorities add their IPv6 ORPort (if any) to the trusted
1119 servers list. Authorities previously added only their IPv4
1120 addresses. Closes ticket 32822.
1122 o Minor features (ed25519, relay):
1123 - Save a relay's base64-encoded ed25519 identity key to the data
1124 directory in a file named fingerprint-ed25519. Closes ticket
1125 30642. Patch by Neel Chauhan.
1127 o Minor features (heartbeat):
1128 - Include the total number of inbound and outbound IPv4 and IPv6
1129 connections in the heartbeat message. Closes ticket 29113.
1131 o Minor features (IPv6, ExcludeNodes):
1132 - Handle IPv6 addresses in ExcludeNodes; previously they were
1133 ignored. Closes ticket 34065. Patch by Neel Chauhan.
1135 o Minor features (logging):
1136 - Add the running glibc version to the log, and the compiled glibc
1137 version to the library list returned when using --library-versions.
1138 Patch from Daniel Pinto. Closes ticket 40047.
1139 - Consider an HTTP 301 response to be an error (like a 404) when
1140 processing a directory response. Closes ticket 40053.
1141 - Log directory fetch statistics as a single line. Closes
1143 - Provide more complete descriptions of our connections when logging
1144 about them. Closes ticket 40041.
1145 - When describing a relay in the logs, we now include its ed25519
1146 identity. Closes ticket 22668.
1148 o Minor features (onion services):
1149 - Only overwrite an onion service's existing hostname file if its
1150 contents are wrong. This enables read-only onion-service
1151 directories. Resolves ticket 40062. Patch by Neel Chauhan.
1153 o Minor features (pluggable transports):
1154 - Add an OutboundBindAddressPT option to allow users to specify
1155 which IPv4 and IPv6 address pluggable transports should use for
1156 outgoing IP packets. Tor does not have a way to enforce that the
1157 pluggable transport honors this option, so each pluggable transport
1158 needs to implement support on its own. Closes ticket 5304.
1160 o Minor features (relay address tracking):
1161 - We now store relay addresses for OR connections in a more logical
1162 way. Previously we would sometimes overwrite the actual address of
1163 a connection with a "canonical address", and then store the "real
1164 address" elsewhere to remember it. We now track the "canonical
1165 address" elsewhere for the cases where we need it, and leave the
1166 connection's address alone. Closes ticket 33898.
1168 o Minor features (relay):
1169 - If a relay is unable to discover its address, attempt to learn it
1170 from the NETINFO cell. Closes ticket 40022.
1171 - Log immediately when launching a relay self-check. Previously we
1172 would try to log before launching checks, or approximately when we
1173 intended to launch checks, but this tended to be error-prone.
1174 Closes ticket 34137.
1176 o Minor features (relay, address discovery):
1177 - If Address option is not found in torrc, attempt to learn our
1178 address with the configured ORPort address if any. Closes
1181 o Minor features (relay, IPv6):
1182 - Add an AssumeReachableIPv6 option to disable self-checking IPv6
1183 reachability. Closes part of ticket 33224.
1184 - Add new "assume-reachable" and "assume-reachable-ipv6" consensus
1185 parameters to be used in an emergency to tell relays that they
1186 should publish even if they cannot complete their ORPort self-
1187 checks. Closes ticket 34064 and part of 33224.
1188 - Allow relays to send IPv6-only extend cells. Closes ticket 33222.
1189 - Declare support for the Relay=3 subprotocol version. Closes
1191 - When launching IPv6 ORPort self-test circuits, make sure that the
1192 second-last hop can initiate an IPv6 extend. Closes ticket 33222.
1194 o Minor features (specification update):
1195 - Several fields in microdescriptors, router descriptors, and
1196 consensus documents that were formerly optional are now required.
1197 Implements proposal 315; closes ticket 40132.
1199 o Minor features (state management):
1200 - When loading the state file, remove entries from the statefile
1201 that have been obsolete for a long time. Ordinarily Tor preserves
1202 unrecognized entries in order to keep forward-compatibility, but
1203 these entries have not actually been used in any release since
1204 before 0.3.5.x. Closes ticket 40137.
1206 o Minor features (statistics, ipv6):
1207 - Relays now publish IPv6-specific counts of single-direction versus
1208 bidirectional relay connections. Closes ticket 33264.
1209 - Relays now publish their IPv6 read and write statistics over time,
1210 if statistics are enabled. Closes ticket 33263.
1212 o Minor features (subprotocol versions):
1213 - Tor no longer allows subprotocol versions larger than 63.
1214 Previously version numbers up to UINT32_MAX were allowed, which
1215 significantly complicated our code. Implements proposal 318;
1216 closes ticket 40133.
1217 - Use the new limitations on subprotocol versions due to proposal
1218 318 to simplify our implementation. Part of ticket 40133.
1220 o Minor features (testing configuration):
1221 - The TestingTorNetwork option no longer implicitly sets
1222 AssumeReachable to 1. This change allows us to test relays' self-
1223 testing mechanisms, and to test authorities' relay-testing
1224 functionality. Closes ticket 34446.
1226 o Minor features (testing):
1227 - Added unit tests for channel_matches_target_addr_for_extend().
1228 Closes Ticket 33919. Patch by MrSquanchee.
1230 o Minor features (tests, v2 onion services):
1231 - Fix a rendezvous cache unit test that was triggering an underflow
1232 on the global rend cache allocation. Fixes bug 40125; bugfix
1234 - Fix another rendezvous cache unit test that was triggering an
1235 underflow on the global rend cache allocation. Fixes bug 40126;
1236 bugfix on 0.2.8.1-alpha.
1238 o Minor bugfixes (circuit padding):
1239 - When circpad_send_padding_cell_for_callback is called,
1240 `is_padding_timer_scheduled` flag was not reset. Now it is set to
1241 0 at the top of that function. Fixes bug 32671; bugfix
1243 - Add a per-circuit padding machine instance counter, so we can
1244 differentiate between shutdown requests for old machines on a
1245 circuit. Fixes bug 30992; bugfix on 0.4.1.1-alpha.
1246 - Add the ability to keep circuit padding machines if they match a
1247 set of circuit states or purposes. This allows us to have machines
1248 that start up under some conditions but don't shut down under
1249 others. We now use this mask to avoid starting up introduction
1250 circuit padding again after the machines have already completed.
1251 Fixes bug 32040; bugfix on 0.4.1.1-alpha.
1253 o Minor bugfixes (compatibility):
1254 - Strip '\r' characters when reading text files on Unix platforms.
1255 This should resolve an issue where a relay operator migrates a
1256 relay from Windows to Unix, but does not change the line ending of
1257 Tor's various state files to match the platform, and the CRLF line
1258 endings from Windows end up leaking into other files such as the
1259 extra-info document. Fixes bug 33781; bugfix on 0.0.9pre5.
1261 o Minor bugfixes (compilation):
1262 - Fix compiler warnings that would occur when building with
1263 "--enable-all-bugs-are-fatal" and "--disable-module-relay" at the
1264 same time. Fixes bug 40129; bugfix on 0.4.4.1-alpha.
1265 - Resolve a compilation warning that could occur in
1266 test_connection.c. Fixes bug 40113; bugfix on 0.2.9.3-alpha.
1268 o Minor bugfixes (configuration):
1269 - Fix bug where %including a pattern ending with */ would include
1270 files and folders (instead of folders only) in versions of glibc <
1271 2.19. Fixes bug 40141; bugfix on 0.4.5.0-alpha-dev. Patch by
1274 o Minor bugfixes (control port):
1275 - Make sure we send the SOCKS request address in relay begin cells
1276 when a stream is attached with the purpose
1277 CIRCUIT_PURPOSE_CONTROLLER. Fixes bug 33124; bugfix on 0.0.5.
1278 Patch by Neel Chauhan.
1280 o Minor bugfixes (logging):
1281 - Remove a debug logging statement that uselessly spammed the logs.
1282 Fixes bug 40135; bugfix on 0.3.5.0-alpha.
1283 - When logging a rate-limited message about how many messages have
1284 been suppressed in the last N seconds, give an accurate value for
1285 N, rounded up to the nearest minute. Previously we would report
1286 the size of the rate-limiting interval, regardless of when the
1287 messages started to occur. Fixes bug 19431; bugfix
1290 o Minor bugfixes (relay configuration, crash):
1291 - Avoid a fatal assert() when failing to create a listener
1292 connection for an address that was in use. Fixes bug 40073; bugfix
1295 o Minor bugfixes (rust, protocol versions):
1296 - Declare support for the onion service introduction point denial of
1297 service extensions when building with Rust. Fixes bug 34248;
1298 bugfix on 0.4.2.1-alpha.
1299 - Make Rust protocol version support checks consistent with the
1300 undocumented error behavior of the corresponding C code. Fixes bug
1301 34251; bugfix on 0.3.3.5-rc.
1303 o Minor bugfixes (self-testing):
1304 - When receiving an incoming circuit, only accept it as evidence
1305 that we are reachable if the declared address of its channel is
1306 the same address we think that we have. Otherwise, it could be
1307 evidence that we're reachable on some other address. Fixes bug
1308 20165; bugfix on 0.1.0.1-rc.
1310 o Minor bugfixes (spec conformance):
1311 - Use the correct key type when generating signing->link
1312 certificates. Fixes bug 40124; bugfix on 0.2.7.2-alpha.
1314 o Minor bugfixes (subprotocol versions):
1315 - Consistently reject extra commas, instead of only rejecting
1316 leading commas. Fixes bug 27194; bugfix on 0.2.9.4-alpha.
1317 - In summarize_protover_flags(), treat empty strings the same as
1318 NULL. This prevents protocols_known from being set. Previously, we
1319 treated empty strings as normal strings, which led to
1320 protocols_known being set. Fixes bug 34232; bugfix on
1321 0.3.3.2-alpha. Patch by Neel Chauhan.
1323 o Minor bugfixes (v2 onion services):
1324 - For HSFETCH commands on v2 onion services addresses, check the
1325 length of bytes decoded, not the base32 length. Fixes bug 34400;
1326 bugfix on 0.4.1.1-alpha. Patch by Neel Chauhan.
1328 o Code simplification and refactoring:
1329 - Add and use a set of functions to perform down-casts on constant
1330 connection and channel pointers. Closes ticket 40046.
1331 - Refactor our code that logs descriptions of connections, channels,
1332 and the peers on them, to use a single call path. This change
1333 enables us to refactor the data types that they use, and eliminates
1334 many confusing usages of those types. Closes ticket 40041.
1335 - Refactor some common node selection code into a single function.
1336 Closes ticket 34200.
1337 - Remove the now-redundant 'outbuf_flushlen' field from our
1338 connection type. It was previously used for an older version of
1339 our rate-limiting logic. Closes ticket 33097.
1340 - Rename "fascist_firewall_*" identifiers to "reachable_addr_*"
1341 instead, for consistency with other code. Closes ticket 18106.
1342 - Rename functions about "advertised" ports which are not in fact
1343 guaranteed to return the ports that have been advertised. Closes
1345 - Split implementation of several command line options from
1346 options_init_from_torrc into smaller isolated functions. Patch by
1347 Daniel Pinto. Closes ticket 40102.
1348 - When an extend cell is missing an IPv4 or IPv6 address, fill in
1349 the address from the extend info. This is similar to what was done
1350 in ticket 33633 for ed25519 keys. Closes ticket 33816. Patch by
1353 o Deprecated features:
1354 - The "non-builtin" argument to the "--dump-config" command is now
1355 deprecated. When it works, it behaves the same as "short", which
1356 you should use instead. Closes ticket 33398.
1359 - Replace URLs from our old bugtracker so that they refer to the new
1360 bugtracker and wiki. Closes ticket 40101.
1363 - We no longer ship or build a "tor.service" file for use with
1364 systemd. No distribution included this script unmodified, and we
1365 don't have the expertise ourselves to maintain this in a way that
1366 all the various systemd-based distributions can use. Closes
1368 - We no longer ship support for the Android logging API. Modern
1369 versions of Android can use the syslog API instead. Closes
1371 - The "optimistic data" feature is now always on; there is no longer
1372 an option to disable it from the torrc file or from the consensus
1373 directory. Closes part of 40139.
1374 - The "usecreatefast" network parameter is now removed; there is no
1375 longer an option for authorities to turn it off. Closes part
1379 - Add unit tests for bandwidth statistics manipulation functions.
1380 Closes ticket 33812. Patch by MrSquanchee.
1382 o Code simplification and refactoring (autoconf):
1383 - Remove autoconf checks for unused funcs and headers. Closes ticket
1384 31699; Patch by @bduszel
1386 o Code simplification and refactoring (maintainer scripts):
1387 - Disable by default the pre-commit hook. Use the environment
1388 variable TOR_EXTRA_PRE_COMMIT_CHECKS in order to run it.
1389 Furthermore, stop running practracker in the pre-commit hook and
1390 make check-local. Closes ticket 40019.
1392 o Code simplification and refactoring (relay address):
1393 - Most of IPv4 representation was using "uint32_t". It has now been
1394 moved to use the internal "tor_addr_t" interface instead. This is
1395 so we can properly integrate IPv6 along IPv4 with common
1396 interfaces. Closes ticket 40043.
1398 o Documentation (manual page):
1399 - Move them from doc/ to doc/man/. Closes ticket 40044.
1400 - Describe the status of the "Sandbox" option more accurately. It is
1401 no longer "experimental", but it _is_ dependent on kernel and libc
1402 versions. Closes ticket 23378.
1404 o Documentation (tracing):
1405 - Document in depth the circuit subsystem trace events in the new
1406 doc/tracing/EventsCircuit.md. Closes ticket 40036.
1409 Changes in version 0.4.4.5 - 2020-09-15
1410 Tor 0.4.4.5 is the first stable release in the 0.4.4.x series. This
1411 series improves our guard selection algorithms, adds v3 onion balance
1412 support, improves the amount of code that can be disabled when running
1413 without relay support, and includes numerous small bugfixes and
1414 enhancements. It also lays the ground for some IPv6 features that
1415 we'll be developing more in the next (0.4.5) series.
1417 Per our support policy, we support each stable release series for nine
1418 months after its first stable release, or three months after the first
1419 stable release of the next series: whichever is longer. This means
1420 that 0.4.4.x will be supported until around June 2021--or later, if
1421 0.4.5.x is later than anticipated.
1423 Note also that support for 0.4.2.x has just ended; support for 0.4.3
1424 will continue until Feb 15, 2021. We still plan to continue supporting
1425 0.3.5.x, our long-term stable series, until Feb 2022.
1427 Below are the changes since 0.4.4.4-rc. For a complete list of changes
1428 since 0.4.3.6, see the ReleaseNotes file.
1430 o Major bugfixes (onion services, DoS):
1431 - Correct handling of parameters for the onion service DoS defense.
1432 Previously, the consensus parameters for the onion service DoS
1433 defenses were overwriting the parameters set by the service
1434 operator using HiddenServiceEnableIntroDoSDefense. Fixes bug
1435 40109; bugfix on 0.4.2.1-alpha.
1437 o Major bugfixes (stats, onion services):
1438 - Fix a bug where we were undercounting the Tor network's total
1439 onion service traffic, by ignoring any traffic originating from
1440 clients. Now we count traffic from both clients and services.
1441 Fixes bug 40117; bugfix on 0.2.6.2-alpha.
1443 o Minor features (control port):
1444 - If a ClientName was specified in ONION_CLIENT_AUTH_ADD for an
1445 onion service, display it when we use ONION_CLIENT_AUTH_VIEW.
1446 Closes ticket 40089. Patch by Neel Chauhan.
1448 o Minor features (denial-of-service memory limiter):
1449 - Allow the user to configure even lower values for the
1450 MaxMemInQueues parameter. Relays now enforce a minimum of 64 MB,
1451 when previously the minimum was 256 MB. On clients, there is no
1452 minimum. Relays and clients will both warn if the value is set so
1453 low that Tor is likely to stop working. Closes ticket 24308.
1455 o Minor features (tests):
1456 - Our "make check" target now runs the unit tests in 8 parallel
1457 chunks. Doing this speeds up hardened CI builds by more than a
1458 factor of two. Closes ticket 40098.
1460 o Minor bugfixes (guard selection algorithm):
1461 - Avoid needless guard-related warning when upgrading from 0.4.3 to
1462 0.4.4. Fixes bug 40105; bugfix on 0.4.4.1-alpha.
1464 o Minor bugfixes (tests):
1465 - Fix the behavior of the rend_cache/clean_v2_descs_as_dir when run
1466 on its own. Previously, it would exit with an error. Fixes bug
1467 40099; bugfix on 0.2.8.1-alpha.
1470 Changes in version 0.4.4.3-alpha - 2020-07-27
1471 Tor 0.4.4.3-alpha fixes several annoyances in previous versions,
1472 including one affecting NSS users, and several affecting the Linux
1475 o Major features (fallback directory list):
1476 - Replace the 148 fallback directories originally included in Tor
1477 0.4.1.4-rc (of which around 105 are still functional) with a list
1478 of 144 fallbacks generated in July 2020. Closes ticket 40061.
1480 o Major bugfixes (NSS):
1481 - When running with NSS enabled, make sure that NSS knows to expect
1482 nonblocking sockets. Previously, we set our TCP sockets as
1483 nonblocking, but did not tell NSS, which in turn could lead to
1484 unexpected blocking behavior. Fixes bug 40035; bugfix
1487 o Minor bugfixes (linux seccomp2 sandbox):
1488 - Fix a regression on sandboxing rules for the openat() syscall. The
1489 fix for bug 25440 fixed the problem on systems with glibc >= 2.27
1490 but broke with versions of glibc. We now choose a rule based on
1491 the glibc version. Patch from Daniel Pinto. Fixes bug 27315;
1493 - Makes the seccomp sandbox allow the correct syscall for opendir
1494 according to the running glibc version. This fixes crashes when
1495 reloading torrc with sandbox enabled when running on glibc 2.15 to
1496 2.21 and 2.26. Patch from Daniel Pinto. Fixes bug 40020; bugfix
1499 o Minor bugfixes (relay, usability):
1500 - Adjust the rules for when to warn about having too many
1501 connections to other relays. Previously we'd tolerate up to 1.5
1502 connections per relay on average. Now we tolerate more connections
1503 for directory authorities, and raise the number of total
1504 connections we need to see before we warn. Fixes bug 33880; bugfix
1508 - Replace most http:// URLs in our code and documentation with
1509 https:// URLs. (We have left unchanged the code in src/ext/, and
1510 the text in LICENSE.) Closes ticket 31812. Patch from Jeremy Rand.
1513 - Our "check-local" test target no longer tries to use the
1514 Coccinelle semantic patching tool parse all the C files. While it
1515 is a good idea to try to make sure Coccinelle works on our C
1516 before we run a Coccinelle patch, doing so on every test run has
1517 proven to be disruptive. You can still run this tool manually with
1518 "make check-cocci". Closes ticket 40030.
1521 Changes in version 0.3.5.11 - 2020-07-09
1522 Tor 0.3.5.11 backports fixes from later tor releases, including several
1523 usability, portability, and reliability fixes.
1525 This release also fixes TROVE-2020-001, a medium-severity denial of
1526 service vulnerability affecting all versions of Tor when compiled with
1527 the NSS encryption library. (This is not the default configuration.)
1528 Using this vulnerability, an attacker could cause an affected Tor
1529 instance to crash remotely. This issue is also tracked as CVE-2020-
1530 15572. Anybody running a version of Tor built with the NSS library
1531 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
1534 o Major bugfixes (NSS, security, backport from 0.4.4.2-alpha):
1535 - Fix a crash due to an out-of-bound memory access when Tor is
1536 compiled with NSS support. Fixes bug 33119; bugfix on
1537 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
1540 o Major bugfixes (DoS defenses, bridges, pluggable transport, backport from 0.4.3.4-rc):
1541 - Fix a bug that was preventing DoS defenses from running on bridges
1542 with a pluggable transport. Previously, the DoS subsystem was not
1543 given the transport name of the client connection, thus failed to
1544 find the GeoIP cache entry for that client address. Fixes bug
1545 33491; bugfix on 0.3.3.2-alpha.
1547 o Minor features (testing, backport from 0.4.3.4-rc):
1548 - The unit tests now support a "TOR_SKIP_TESTCASES" environment
1549 variable to specify a list of space-separated test cases that
1550 should not be executed. We will use this to disable certain tests
1551 that are failing on Appveyor because of mismatched OpenSSL
1552 libraries. Part of ticket 33643.
1554 o Minor bugfix (CI, Windows, backport from 0.4.4.2-alpha):
1555 - Use the correct 64-bit printf format when compiling with MINGW on
1556 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
1558 o Minor bugfix (relay, configuration, backport from 0.4.3.3-alpha):
1559 - Warn if the ContactInfo field is not set, and tell the relay
1560 operator that not having a ContactInfo field set might cause their
1561 relay to get rejected in the future. Fixes bug 33361; bugfix
1564 o Minor bugfixes (client performance, backport from 0.4.4.1-alpha):
1565 - Resume use of preemptively-built circuits when UseEntryGuards is set
1566 to 0. We accidentally disabled this feature with that config
1567 setting, leading to slower load times. Fixes bug 34303; bugfix
1570 o Minor bugfixes (compiler compatibility, backport from 0.4.3.5):
1571 - Avoid compiler warnings from Clang 10 related to the use of GCC-
1572 style "/* falls through */" comments. Both Clang and GCC allow
1573 __attribute__((fallthrough)) instead, so that's what we're using
1574 now. Fixes bug 34078; bugfix on 0.3.1.3-alpha.
1576 o Minor bugfixes (compiler warnings, backport from 0.4.4.2-alpha):
1577 - Fix a compiler warning on platforms with 32-bit time_t values.
1578 Fixes bug 40028; bugfix on 0.3.2.8-rc.
1580 o Minor bugfixes (embedded Tor, backport from 0.4.3.1-alpha):
1581 - When starting Tor any time after the first time in a process,
1582 register the thread in which it is running as the main thread.
1583 Previously, we only did this on Windows, which could lead to bugs
1584 like 23081 on non-Windows platforms. Fixes bug 32884; bugfix
1587 o Minor bugfixes (key portability, backport from 0.4.3.4-rc):
1588 - When reading PEM-encoded key data, tolerate CRLF line-endings even
1589 if we are not running on Windows. Previously, non-Windows hosts
1590 would reject these line-endings in certain positions, making
1591 certain key files hard to move from one host to another. Fixes bug
1592 33032; bugfix on 0.3.5.1-alpha.
1594 o Minor bugfixes (logging, backport from 0.4.4.2-alpha):
1595 - Downgrade a noisy log message that could occur naturally when
1596 receiving an extrainfo document that we no longer want. Fixes bug
1597 16016; bugfix on 0.2.6.3-alpha.
1599 o Minor bugfixes (onion service v3, client, backport from 0.4.3.3-alpha):
1600 - Remove a BUG() warning that would cause a stack trace if an onion
1601 service descriptor was freed while we were waiting for a
1602 rendezvous circuit to complete. Fixes bug 28992; bugfix
1605 o Testing (CI, backport from 0.4.3.4-rc):
1606 - In our Appveyor Windows CI, copy required DLLs to test and app
1607 directories, before running tor's tests. This ensures that tor.exe
1608 and test*.exe use the correct version of each DLL. This fix is not
1609 required, but we hope it will avoid DLL search issues in future.
1610 Fixes bug 33673; bugfix on 0.3.4.2-alpha.
1611 - On Appveyor, skip the crypto/openssl_version test, which is
1612 failing because of a mismatched library installation. Fix
1616 Changes in version 0.4.2.8 - 2020-07-09
1617 Tor 0.4.2.8 backports various fixes from later releases, including
1618 several that affect usability and portability.
1620 This release also fixes TROVE-2020-001, a medium-severity denial of
1621 service vulnerability affecting all versions of Tor when compiled with
1622 the NSS encryption library. (This is not the default configuration.)
1623 Using this vulnerability, an attacker could cause an affected Tor
1624 instance to crash remotely. This issue is also tracked as CVE-2020-
1625 15572. Anybody running a version of Tor built with the NSS library
1626 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
1629 o Major bugfixes (NSS, security, backport from 0.4.4.2-alpha):
1630 - Fix a crash due to an out-of-bound memory access when Tor is
1631 compiled with NSS support. Fixes bug 33119; bugfix on
1632 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
1635 o Major bugfixes (DoS defenses, bridges, pluggable transport, backport from 0.4.3.4-rc):
1636 - Fix a bug that was preventing DoS defenses from running on bridges
1637 with a pluggable transport. Previously, the DoS subsystem was not
1638 given the transport name of the client connection, thus failed to
1639 find the GeoIP cache entry for that client address. Fixes bug
1640 33491; bugfix on 0.3.3.2-alpha.
1642 o Minor feature (sendme, flow control, backport form 0.4.3.4-rc):
1643 - Default to sending SENDME version 1 cells. (Clients are already
1644 sending these, because of a consensus parameter telling them to do
1645 so: this change only affects what clients would do if the
1646 consensus didn't contain a recommendation.) Closes ticket 33623.
1648 o Minor features (diagnostic, backport from 0.4.3.3-alpha):
1649 - Improve assertions and add some memory-poisoning code to try to
1650 track down possible causes of a rare crash (32564) in the EWMA
1651 code. Closes ticket 33290.
1653 o Minor features (testing, backport from 0.4.3.4-rc):
1654 - The unit tests now support a "TOR_SKIP_TESTCASES" environment
1655 variable to specify a list of space-separated test cases that
1656 should not be executed. We will use this to disable certain tests
1657 that are failing on Appveyor because of mismatched OpenSSL
1658 libraries. Part of ticket 33643.
1660 o Minor bugfix (CI, Windows, backport from 0.4.4.2-alpha):
1661 - Use the correct 64-bit printf format when compiling with MINGW on
1662 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
1664 o Minor bugfix (relay, configuration, backport from 0.4.3.3-alpha):
1665 - Warn if the ContactInfo field is not set, and tell the relay
1666 operator that not having a ContactInfo field set might cause their
1667 relay to get rejected in the future. Fixes bug 33361; bugfix
1670 o Minor bugfixes (client performance, backport from 0.4.4.1-alpha):
1671 - Resume use of preemptively-built circuits when UseEntryGuards is set
1672 to 0. We accidentally disabled this feature with that config
1673 setting, leading to slower load times. Fixes bug 34303; bugfix
1676 o Minor bugfixes (compiler compatibility, backport from 0.4.3.5):
1677 - Avoid compiler warnings from Clang 10 related to the use of GCC-
1678 style "/* falls through */" comments. Both Clang and GCC allow
1679 __attribute__((fallthrough)) instead, so that's what we're using
1680 now. Fixes bug 34078; bugfix on 0.3.1.3-alpha.
1681 - Fix compilation warnings with GCC 10.0.1. Fixes bug 34077; bugfix
1684 o Minor bugfixes (compiler warnings, backport from 0.4.4.2-alpha):
1685 - Fix a compiler warning on platforms with 32-bit time_t values.
1686 Fixes bug 40028; bugfix on 0.3.2.8-rc.
1688 o Minor bugfixes (controller protocol, backport from 0.4.3.2-alpha):
1689 - When receiving "ACTIVE" or "DORMANT" signals on the control port,
1690 report them as SIGNAL events. Previously we would log a bug
1691 warning. Fixes bug 33104; bugfix on 0.4.0.1-alpha.
1693 o Minor bugfixes (embedded Tor, backport from 0.4.3.1-alpha):
1694 - When starting Tor any time after the first time in a process,
1695 register the thread in which it is running as the main thread.
1696 Previously, we only did this on Windows, which could lead to bugs
1697 like 23081 on non-Windows platforms. Fixes bug 32884; bugfix
1700 o Minor bugfixes (key portability, backport from 0.4.3.4-rc):
1701 - When reading PEM-encoded key data, tolerate CRLF line-endings even
1702 if we are not running on Windows. Previously, non-Windows hosts
1703 would reject these line-endings in certain positions, making
1704 certain key files hard to move from one host to another. Fixes bug
1705 33032; bugfix on 0.3.5.1-alpha.
1707 o Minor bugfixes (logging, backport from 0.4.3.2-rc):
1708 - When logging a bug, do not say "Future instances of this warning
1709 will be silenced" unless we are actually going to silence them.
1710 Previously we would say this whenever a BUG() check failed in the
1711 code. Fixes bug 33095; bugfix on 0.4.1.1-alpha.
1713 o Minor bugfixes (logging, backport from 0.4.3.4-rc):
1714 - Flush stderr, stdout, and file logs during shutdown, if supported
1715 by the OS. This change helps make sure that any final logs are
1716 recorded. Fixes bug 33087; bugfix on 0.4.1.6.
1718 o Minor bugfixes (logging, backport from 0.4.4.2-alpha):
1719 - Downgrade a noisy log message that could occur naturally when
1720 receiving an extrainfo document that we no longer want. Fixes bug
1721 16016; bugfix on 0.2.6.3-alpha.
1723 o Minor bugfixes (onion service v3, client, backport from 0.4.3.3-alpha):
1724 - Remove a BUG() warning that would cause a stack trace if an onion
1725 service descriptor was freed while we were waiting for a
1726 rendezvous circuit to complete. Fixes bug 28992; bugfix
1729 o Testing (CI, backport from 0.4.3.4-rc):
1730 - In our Appveyor Windows CI, copy required DLLs to test and app
1731 directories, before running tor's tests. This ensures that tor.exe
1732 and test*.exe use the correct version of each DLL. This fix is not
1733 required, but we hope it will avoid DLL search issues in future.
1734 Fixes bug 33673; bugfix on 0.3.4.2-alpha.
1735 - On Appveyor, skip the crypto/openssl_version test, which is
1736 failing because of a mismatched library installation. Fix
1740 Changes in version 0.4.3.6 - 2020-07-09
1741 Tor 0.4.3.6 backports several bugfixes from later releases, including
1742 some affecting usability.
1744 This release also fixes TROVE-2020-001, a medium-severity denial of
1745 service vulnerability affecting all versions of Tor when compiled with
1746 the NSS encryption library. (This is not the default configuration.)
1747 Using this vulnerability, an attacker could cause an affected Tor
1748 instance to crash remotely. This issue is also tracked as CVE-2020-
1749 15572. Anybody running a version of Tor built with the NSS library
1750 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
1753 o Major bugfixes (NSS, security, backport from 0.4.4.2-alpha):
1754 - Fix a crash due to an out-of-bound memory access when Tor is
1755 compiled with NSS support. Fixes bug 33119; bugfix on
1756 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
1759 o Minor bugfix (CI, Windows, backport from 0.4.4.2-alpha):
1760 - Use the correct 64-bit printf format when compiling with MINGW on
1761 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
1763 o Minor bugfixes (client performance, backport from 0.4.4.1-alpha):
1764 - Resume use of preemptively-built circuits when UseEntryGuards is set
1765 to 0. We accidentally disabled this feature with that config
1766 setting, leading to slower load times. Fixes bug 34303; bugfix
1769 o Minor bugfixes (compiler warnings, backport from 0.4.4.2-alpha):
1770 - Fix a compiler warning on platforms with 32-bit time_t values.
1771 Fixes bug 40028; bugfix on 0.3.2.8-rc.
1773 o Minor bugfixes (linux seccomp sandbox, nss, backport from 0.4.4.1-alpha):
1774 - Fix a startup crash when tor is compiled with --enable-nss and
1775 sandbox support is enabled. Fixes bug 34130; bugfix on
1776 0.3.5.1-alpha. Patch by Daniel Pinto.
1778 o Minor bugfixes (logging, backport from 0.4.4.2-alpha):
1779 - Downgrade a noisy log message that could occur naturally when
1780 receiving an extrainfo document that we no longer want. Fixes bug
1781 16016; bugfix on 0.2.6.3-alpha.
1783 o Minor bugfixes (manual page, backport from 0.4.4.1-alpha):
1784 - Update the man page to reflect that MinUptimeHidServDirectoryV2
1785 defaults to 96 hours. Fixes bug 34299; bugfix on 0.2.6.3-alpha.
1787 o Minor bugfixes (onion service v3, backport from 0.4.4.1-alpha):
1788 - Prevent an assert() that would occur when cleaning the client
1789 descriptor cache, and attempting to close circuits for a non-
1790 decrypted descriptor (lacking client authorization). Fixes bug
1791 33458; bugfix on 0.4.2.1-alpha.
1793 o Minor bugfixes (portability, backport from 0.4.4.1-alpha):
1794 - Fix a portability error in the configure script, where we were
1795 using "==" instead of "=". Fixes bug 34233; bugfix on 0.4.3.5.
1797 o Minor bugfixes (relays, backport from 0.4.4.1-alpha):
1798 - Stop advertising incorrect IPv6 ORPorts in relay and bridge
1799 descriptors, when the IPv6 port was configured as "auto". Fixes
1800 bug 32588; bugfix on 0.2.3.9-alpha.
1802 o Documentation (backport from 0.4.4.1-alpha):
1803 - Fix several doxygen warnings related to imbalanced groups. Closes
1807 Changes in version 0.4.4.2-alpha - 2020-07-09
1808 This is the second alpha release in the 0.4.4.x series. It fixes a few
1809 bugs in the previous release, and solves a few usability,
1810 compatibility, and portability issues.
1812 This release also fixes TROVE-2020-001, a medium-severity denial of
1813 service vulnerability affecting all versions of Tor when compiled with
1814 the NSS encryption library. (This is not the default configuration.)
1815 Using this vulnerability, an attacker could cause an affected Tor
1816 instance to crash remotely. This issue is also tracked as CVE-2020-
1817 15572. Anybody running a version of Tor built with the NSS library
1818 should upgrade to 0.3.5.11, 0.4.2.8, 0.4.3.6, or 0.4.4.2-alpha
1821 o Major bugfixes (NSS, security):
1822 - Fix a crash due to an out-of-bound memory access when Tor is
1823 compiled with NSS support. Fixes bug 33119; bugfix on
1824 0.3.5.1-alpha. This issue is also tracked as TROVE-2020-001
1827 o Minor features (bootstrap reporting):
1828 - Report more detailed reasons for bootstrap failure when the
1829 failure happens due to a TLS error. Previously we would just call
1830 these errors "MISC" when they happened during read, and "DONE"
1831 when they happened during any other TLS operation. Closes
1834 o Minor features (directory authority):
1835 - Authorities now recommend the protocol versions that are supported
1836 by Tor 0.3.5 and later. (Earlier versions of Tor have been
1837 deprecated since January of this year.) This recommendation will
1838 cause older clients and relays to give a warning on startup, or
1839 when they download a consensus directory. Closes ticket 32696.
1841 o Minor features (entry guards):
1842 - Reinstate support for GUARD NEW/UP/DOWN control port events.
1843 Closes ticket 40001.
1845 o Minor features (linux seccomp2 sandbox, portability):
1846 - Allow Tor to build on platforms where it doesn't know how to
1847 report which syscall caused the linux seccomp2 sandbox to fail.
1848 This change should make the sandbox code more portable to less
1849 common Linux architectures. Closes ticket 34382.
1850 - Permit the unlinkat() syscall, which some Libc implementations use
1851 to implement unlink(). Closes ticket 33346.
1853 o Minor bugfix (CI, Windows):
1854 - Use the correct 64-bit printf format when compiling with MINGW on
1855 Appveyor. Fixes bug 40026; bugfix on 0.3.5.5-alpha.
1857 o Minor bugfix (onion service v3 client):
1858 - Remove a BUG() warning that could occur naturally. Fixes bug
1859 34087; bugfix on 0.3.2.1-alpha.
1861 o Minor bugfix (SOCKS, onion service client):
1862 - Detect v3 onion service addresses of the wrong length when
1863 returning the F6 ExtendedErrors code. Fixes bug 33873; bugfix
1866 o Minor bugfixes (compiler warnings):
1867 - Fix a compiler warning on platforms with 32-bit time_t values.
1868 Fixes bug 40028; bugfix on 0.3.2.8-rc.
1870 o Minor bugfixes (control port, onion service):
1871 - Consistently use 'address' in "Invalid v3 address" response to
1872 ONION_CLIENT_AUTH commands. Previously, we would sometimes say
1873 'addr'. Fixes bug 40005; bugfix on 0.4.3.1-alpha.
1875 o Minor bugfixes (logging):
1876 - Downgrade a noisy log message that could occur naturally when
1877 receiving an extrainfo document that we no longer want. Fixes bug
1878 16016; bugfix on 0.2.6.3-alpha.
1880 o Minor bugfixes (onion services v3):
1881 - Avoid a non-fatal assertion failure in certain edge-cases when
1882 opening an intro circuit as a client. Fixes bug 34084; bugfix
1885 o Deprecated features (onion service v2):
1886 - Add a deprecation warning for version 2 onion services. Closes
1889 o Removed features (IPv6, revert):
1890 - Revert the change in the default value of ClientPreferIPv6OrPort:
1891 it breaks the torsocks use case. The SOCKS resolve command has no
1892 mechanism to ask for a specific address family (v4 or v6), and so
1893 prioritizing IPv6 when an IPv4 address is requested on the SOCKS
1894 interface resulted in a failure. Tor Browser explicitly sets
1895 PreferIPv6, so this should not affect the majority of our users.
1896 Closes ticket 33796; bugfix on 0.4.4.1-alpha.
1899 Changes in version 0.4.4.1-alpha - 2020-06-16
1900 This is the first alpha release in the 0.4.4.x series. It improves
1901 our guard selection algorithms, improves the amount of code that
1902 can be disabled when running without relay support, and includes numerous
1903 small bugfixes and enhancements. It also lays the ground for some IPv6
1904 features that we'll be developing more in the next (0.4.5) series.
1906 Here are the changes since 0.4.3.5.
1908 o Major features (Proposal 310, performance + security):
1909 - Implements Proposal 310, "Bandaid on guard selection". Proposal
1910 310 solves load-balancing issues with older versions of the guard
1911 selection algorithm, and improves its security. Under this new
1912 algorithm, a newly selected guard never becomes Primary unless all
1913 previously sampled guards are unreachable. Implements
1914 recommendation from 32088. (Proposal 310 is linked to the CLAPS
1915 project researching optimal client location-aware path selections.
1916 This project is a collaboration between the UCLouvain Crypto Group,
1917 the U.S. Naval Research Laboratory, and Princeton University.)
1919 o Major features (IPv6, relay):
1920 - Consider IPv6-only EXTEND2 cells valid on relays. Log a protocol
1921 warning if the IPv4 or IPv6 address is an internal address, and
1922 internal addresses are not allowed. But continue to use the other
1923 address, if it is valid. Closes ticket 33817.
1924 - If a relay can extend over IPv4 and IPv6, and both addresses are
1925 provided, it chooses between them uniformly at random. Closes
1927 - Re-use existing IPv6 connections for circuit extends. Closes
1929 - Relays may extend circuits over IPv6, if the relay has an IPv6
1930 ORPort, and the client supplies the other relay's IPv6 ORPort in
1931 the EXTEND2 cell. IPv6 extends will be used by the relay IPv6
1932 ORPort self-tests in 33222. Closes ticket 33817.
1934 o Major features (v3 onion services):
1935 - Allow v3 onion services to act as OnionBalance backend instances,
1936 by using the HiddenServiceOnionBalanceInstance torrc option.
1937 Closes ticket 32709.
1939 o Minor feature (developer tools):
1940 - Add a script to help check the alphabetical ordering of option
1941 names in the manual page. Closes ticket 33339.
1943 o Minor feature (onion service client, SOCKS5):
1944 - Add 3 new SocksPort ExtendedErrors (F2, F3, F7) that reports back
1945 new type of onion service connection failures. The semantics of
1946 these error codes are documented in proposal 309. Closes
1949 o Minor feature (onion service v3):
1950 - If a service cannot upload its descriptor(s), log why at INFO
1951 level. Closes ticket 33400; bugfix on 0.3.2.1-alpha.
1953 o Minor feature (python scripts):
1954 - Stop assuming that /usr/bin/python exists. Instead of using a
1955 hardcoded path in scripts that still use Python 2, use
1956 /usr/bin/env, similarly to the scripts that use Python 3. Fixes
1957 bug 33192; bugfix on 0.4.2.
1959 o Minor features (client-only compilation):
1960 - Disable more code related to the ext_orport protocol when
1961 compiling without support for relay mode. Closes ticket 33368.
1962 - Disable more of our self-testing code when support for relay mode
1963 is disabled. Closes ticket 33370.
1965 o Minor features (code safety):
1966 - Check for failures of tor_inet_ntop() and tor_inet_ntoa()
1967 functions in DNS and IP address processing code, and adjust
1968 codepaths to make them less likely to crash entire Tor instances.
1969 Resolves issue 33788.
1971 o Minor features (compilation size):
1972 - Most server-side DNS code is now disabled when building without
1973 support for relay mode. Closes ticket 33366.
1975 o Minor features (continuous integration):
1976 - Run unit-test and integration test (Stem, Chutney) jobs with
1977 ALL_BUGS_ARE_FATAL macro being enabled on Travis and Appveyor.
1978 Resolves ticket 32143.
1980 o Minor features (control port):
1981 - Return a descriptive error message from the 'GETINFO status/fresh-
1982 relay-descs' command on the control port. Previously, we returned
1983 a generic error of "Error generating descriptor". Closes ticket
1984 32873. Patch by Neel Chauhan.
1986 o Minor features (developer tooling):
1987 - Refrain from listing all .a files that are generated by the Tor
1988 build in .gitignore. Add a single wildcard *.a entry that covers
1989 all of them for present and future. Closes ticket 33642.
1990 - Add a script ("git-install-tools.sh") to install git hooks and
1991 helper scripts. Closes ticket 33451.
1993 o Minor features (directory authority, shared random):
1994 - Refactor more authority-only parts of the shared-random scheduling
1995 code to reside in the dirauth module, and to be disabled when
1996 compiling with --disable-module-dirauth. Closes ticket 33436.
1998 o Minor features (directory):
1999 - Remember the number of bytes we have downloaded for each directory
2000 purpose while bootstrapping, and while fully bootstrapped. Log
2001 this information as part of the heartbeat message. Closes
2004 o Minor features (IPv6 support):
2005 - Adds IPv6 support to tor_addr_is_valid(). Adds tests for the above
2006 changes and tor_addr_is_null(). Closes ticket 33679. Patch
2008 - Allow clients and relays to send dual-stack and IPv6-only EXTEND2
2009 cells. Parse dual-stack and IPv6-only EXTEND2 cells on relays.
2010 Closes ticket 33901.
2012 o Minor features (logging):
2013 - When trying to find our own address, add debug-level logging to
2014 report the sources of candidate addresses. Closes ticket 32888.
2016 o Minor features (testing, architecture):
2017 - Our test scripts now double-check that subsystem initialization
2018 order is consistent with the inter-module dependencies established
2019 by our .may_include files. Implements ticket 31634.
2020 - Initialize all subsystems at the beginning of our unit test
2021 harness, to avoid crashes due to uninitialized subsystems. Follow-
2022 up from ticket 33316.
2024 o Minor features (v3 onion services):
2025 - Add v3 onion service status to the dumpstats() call which is
2026 triggered by a SIGUSR1 signal. Previously, we only did v2 onion
2027 services. Closes ticket 24844. Patch by Neel Chauhan.
2029 o Minor features (windows):
2030 - Add support for console control signals like Ctrl+C in Windows.
2031 Closes ticket 34211. Patch from Damon Harris (TheDcoder).
2033 o Minor bugfix (onion service v3):
2034 - Prevent an assert() that would occur when cleaning the client
2035 descriptor cache, and attempting to close circuits for a non-
2036 decrypted descriptor (lacking client authorization). Fixes bug
2037 33458; bugfix on 0.4.2.1-alpha.
2039 o Minor bugfix (refactoring):
2040 - Lift circuit_build_times_disabled() out of the
2041 circuit_expire_building() loop, to save CPU time when there are
2042 many circuits open. Fixes bug 33977; bugfix on 0.3.5.9.
2044 o Minor bugfixes (client performance):
2045 - Resume use of preemptively-built circuits when UseEntryGuards is set
2046 to 0. We accidentally disabled this feature with that config
2047 setting, leading to slower load times. Fixes bug 34303; bugfix
2050 o Minor bugfixes (directory authorities):
2051 - Directory authorities now reject votes that arrive too late. In
2052 particular, once an authority has started fetching missing votes,
2053 it no longer accepts new votes posted by other authorities. This
2054 change helps prevent a consensus split, where only some authorities
2055 have the late vote. Fixes bug 4631; bugfix on 0.2.0.5-alpha.
2057 o Minor bugfixes (git scripts):
2058 - Stop executing the checked-out pre-commit hook from the pre-push
2059 hook. Instead, execute the copy in the user's git directory. Fixes
2060 bug 33284; bugfix on 0.4.1.1-alpha.
2062 o Minor bugfixes (initialization):
2063 - Initialize the subsystems in our code in an order more closely
2064 corresponding to their dependencies, so that every system is
2065 initialized before the ones that (theoretically) depend on it.
2066 Fixes bug 33316; bugfix on 0.4.0.1-alpha.
2068 o Minor bugfixes (IPv4, relay):
2069 - Check for invalid zero IPv4 addresses and ports when sending and
2070 receiving extend cells. Fixes bug 33900; bugfix on 0.2.4.8-alpha.
2072 o Minor bugfixes (IPv6, relay):
2073 - Consider IPv6 addresses when checking if a connection is
2074 canonical. In 17604, relays assumed that a remote relay could
2075 consider an IPv6 connection canonical, but did not set the
2076 canonical flag on their side of the connection. Fixes bug 33899;
2077 bugfix on 0.3.1.1-alpha.
2078 - Log IPv6 addresses on connections where this relay is the
2079 responder. Previously, responding relays would replace the remote
2080 IPv6 address with the IPv4 address from the consensus. Fixes bug
2081 33899; bugfix on 0.3.1.1-alpha.
2083 o Minor bugfixes (linux seccomp sandbox nss):
2084 - Fix a startup crash when tor is compiled with --enable-nss and
2085 sandbox support is enabled. Fixes bug 34130; bugfix on
2086 0.3.5.1-alpha. Patch by Daniel Pinto.
2088 o Minor bugfixes (logging, testing):
2089 - Make all of tor's assertion macros support the ALL_BUGS_ARE_FATAL
2090 and DISABLE_ASSERTS_IN_UNIT_TESTS debugging modes. (IF_BUG_ONCE()
2091 used to log a non-fatal warning, regardless of the debugging
2092 mode.) Fixes bug 33917; bugfix on 0.2.9.1-alpha.
2094 o Minor bugfixes (logs):
2095 - Remove surprising empty line in the INFO-level log about circuit
2096 build timeout. Fixes bug 33531; bugfix on 0.3.3.1-alpha.
2098 o Minor bugfixes (mainloop):
2099 - Better guard against growing a buffer past its maximum 2GB in
2100 size. Fixes bug 33131; bugfix on 0.3.0.4-rc.
2102 o Minor bugfixes (manual page):
2103 - Update the man page to reflect that MinUptimeHidServDirectoryV2
2104 defaults to 96 hours. Fixes bug 34299; bugfix on 0.2.6.3-alpha.
2106 o Minor bugfixes (onion service v3, client):
2107 - Remove a BUG() that was causing a stacktrace when a descriptor
2108 changed at an unexpected time. Fixes bug 28992; bugfix
2111 o Minor bugfixes (onion service, logging):
2112 - Fix a typo in a log message PublishHidServDescriptors is set to 0.
2113 Fixes bug 33779; bugfix on 0.3.2.1-alpha.
2115 o Minor bugfixes (portability):
2116 - Fix a portability error in the configure script, where we were
2117 using "==" instead of "=". Fixes bug 34233; bugfix on 0.4.3.5.
2119 o Minor bugfixes (protocol versions):
2120 - Sort tor's supported protocol version lists, as recommended by the
2121 tor directory specification. Fixes bug 33285; bugfix
2124 o Minor bugfixes (relays):
2125 - Stop advertising incorrect IPv6 ORPorts in relay and bridge
2126 descriptors, when the IPv6 port was configured as "auto". Fixes
2127 bug 32588; bugfix on 0.2.3.9-alpha.
2129 o Code simplification and refactoring:
2130 - Define and use a new constant TOR_ADDRPORT_BUF_LEN which is like
2131 TOR_ADDR_BUF_LEN but includes enough space for an IP address,
2132 brackets, separating colon, and port number. Closes ticket 33956.
2133 Patch by Neel Chauhan.
2134 - Merge the orconn and ocirc events into the "core" subsystem, which
2135 manages or connections and origin circuits. Previously they were
2136 isolated in subsystems of their own.
2137 - Move LOG_PROTOCOL_WARN to app/config. Resolves a dependency
2138 inversion. Closes ticket 33633.
2139 - Move the circuit extend code to the relay module. Split the
2140 circuit extend function into smaller functions. Closes
2142 - Rewrite port_parse_config() to use the default port flags from
2143 port_cfg_new(). Closes ticket 32994. Patch by MrSquanchee.
2144 - Updated comments in 'scheduler.c' to reflect old code changes, and
2145 simplified the scheduler channel state change code. Closes
2149 - Document the limitations of using %include on config files with
2150 seccomp sandbox enabled. Fixes documentation bug 34133; bugfix on
2151 0.3.1.1-alpha. Patch by Daniel Pinto.
2152 - Fix several doxygen warnings related to imbalanced groups. Closes
2156 - Remove the ClientAutoIPv6ORPort option. This option attempted to
2157 randomly choose between IPv4 and IPv6 for client connections, and
2158 wasn't a true implementation of Happy Eyeballs. Often, this option
2159 failed on IPv4-only or IPv6-only connections. Closes ticket 32905.
2160 Patch by Neel Chauhan.
2161 - Stop shipping contrib/dist/rc.subr file, as it is not being used
2162 on FreeBSD anymore. Closes issue 31576.
2165 - Add a basic IPv6 test to "make test-network". This test only runs
2166 when the local machine has an IPv6 stack. Closes ticket 33300.
2167 - Add test-network-ipv4 and test-network-ipv6 jobs to the Makefile.
2168 These jobs run the IPv4-only and dual-stack chutney flavours from
2169 test-network-all. Closes ticket 33280.
2170 - Remove a redundant distcheck job. Closes ticket 33194.
2171 - Run the test-network-ipv6 Makefile target in the Travis CI IPv6
2172 chutney job. This job runs on macOS, so it's a bit slow. Closes
2174 - Sort the Travis jobs in order of speed. Putting the slowest jobs
2175 first takes full advantage of Travis job concurrency. Closes
2177 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
2178 previously configured to fast_finish (which requires
2179 allow_failure), to speed up the build. Closes ticket 33195.
2180 - Test v3 onion services to tor's mixed IPv4 chutney network. And
2181 add a mixed IPv6 chutney network. These networks are used in the
2182 test-network-all, test-network-ipv4, and test-network-ipv6 make
2183 targets. Closes ticket 33334.
2184 - Use the "bridges+hs-v23" chutney network flavour in "make test-
2185 network". This test requires a recent version of chutney (mid-
2186 February 2020). Closes ticket 28208.
2187 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
2188 tool to produce detailed diagnostic output. Closes ticket 32792.
2190 o Code simplification and refactoring (onion service):
2191 - Refactor configuration parsing to use the new config subsystem
2192 code. Closes ticket 33014.
2194 o Code simplification and refactoring (relay address):
2195 - Move a series of functions related to address resolving into their
2196 own files. Closes ticket 33789.
2198 o Documentation (manual page):
2199 - Add cross reference links and a table of contents to the HTML tor
2200 manual page. Closes ticket 33369. Work by Swati Thacker as part of
2201 Google Season of Docs.
2202 - Alphabetize the Denial of Service Mitigation Options, Directory
2203 Authority Server Options, Hidden Service Options, and Testing
2204 Network Options sections of the tor(1) manual page. Closes ticket
2205 33275. Work by Swati Thacker as part of Google Season of Docs.
2206 - Refrain from mentioning nicknames in manpage section for MyFamily
2207 torrc option. Resolves issue 33417.
2208 - Updated the options set by TestingTorNetwork in the manual page.
2209 Closes ticket 33778.
2212 Changes in version 0.4.3.5 - 2020-05-15
2213 Tor 0.4.3.5 is the first stable release in the 0.4.3.x series. This
2214 series adds support for building without relay code enabled, and
2215 implements functionality needed for OnionBalance with v3 onion
2216 services. It includes significant refactoring of our configuration and
2217 controller functionality, and fixes numerous smaller bugs and
2220 Per our support policy, we support each stable release series for nine
2221 months after its first stable release, or three months after the first
2222 stable release of the next series: whichever is longer. This means
2223 that 0.4.3.x will be supported until around February 2021--later, if
2224 0.4.4.x is later than anticipated.
2226 Note also that support for 0.4.1.x is about to end on May 20 of this
2227 year; 0.4.2.x will be supported until September 15. We still plan to
2228 continue supporting 0.3.5.x, our long-term stable series, until
2231 Below are the changes since 0.4.3.4-rc. For a complete list of changes
2232 since 0.4.2.6, see the ReleaseNotes file.
2234 o Minor bugfixes (compiler compatibility):
2235 - Avoid compiler warnings from Clang 10 related to the use of GCC-
2236 style "/* falls through */" comments. Both Clang and GCC allow
2237 __attribute__((fallthrough)) instead, so that's what we're using
2238 now. Fixes bug 34078; bugfix on 0.3.1.3-alpha.
2239 - Fix compilation warnings with GCC 10.0.1. Fixes bug 34077; bugfix
2242 o Minor bugfixes (logging):
2243 - Stop truncating IPv6 addresses and ports in channel and connection
2244 logs. Fixes bug 33918; bugfix on 0.2.4.4-alpha.
2245 - Fix a logic error in a log message about whether an address was
2246 invalid. Previously, the code would never report that onion
2247 addresses were onion addresses. Fixes bug 34131; bugfix
2251 Changes in version 0.4.3.4-rc - 2020-04-13
2252 Tor 0.4.3.4-rc is the first release candidate in its series. It fixes
2253 several bugs from earlier versions, including one affecting DoS
2254 defenses on bridges using pluggable transports.
2256 o Major bugfixes (DoS defenses, bridges, pluggable transport):
2257 - Fix a bug that was preventing DoS defenses from running on bridges
2258 with a pluggable transport. Previously, the DoS subsystem was not
2259 given the transport name of the client connection, thus failed to
2260 find the GeoIP cache entry for that client address. Fixes bug
2261 33491; bugfix on 0.3.3.2-alpha.
2263 o Minor feature (sendme, flow control):
2264 - Default to sending SENDME version 1 cells. (Clients are already
2265 sending these, because of a consensus parameter telling them to do
2266 so: this change only affects what clients would do if the
2267 consensus didn't contain a recommendation.) Closes ticket 33623.
2269 o Minor features (testing):
2270 - The unit tests now support a "TOR_SKIP_TESTCASES" environment
2271 variable to specify a list of space-separated test cases that
2272 should not be executed. We will use this to disable certain tests
2273 that are failing on Appveyor because of mismatched OpenSSL
2274 libraries. Part of ticket 33643.
2276 o Minor bugfixes (--disable-module-relay):
2277 - Fix an assertion failure when Tor is built without the relay
2278 module, and then invoked with the "User" option. Fixes bug 33668;
2279 bugfix on 0.4.3.1-alpha.
2281 o Minor bugfixes (--disable-module-relay,--disable-module-dirauth):
2282 - Set some output arguments in the relay and dirauth module stubs,
2283 to guard against future stub argument handling bugs like 33668.
2284 Fixes bug 33674; bugfix on 0.4.3.1-alpha.
2286 o Minor bugfixes (build system):
2287 - Correctly output the enabled module in the configure summary.
2288 Before that, the list shown was just plain wrong. Fixes bug 33646;
2289 bugfix on 0.4.3.2-alpha.
2291 o Minor bugfixes (client, IPv6):
2292 - Stop forcing all non-SocksPorts to prefer IPv6 exit connections.
2293 Instead, prefer IPv6 connections by default, but allow users to
2294 change their configs using the "NoPreferIPv6" port flag. Fixes bug
2295 33608; bugfix on 0.4.3.1-alpha.
2296 - Revert PreferIPv6 set by default on the SocksPort because it broke
2297 the torsocks use case. Tor doesn't have a way for an application
2298 to request the hostname to be resolved for a specific IP version,
2299 but torsocks requires that. Up until now, IPv4 was used by default
2300 so torsocks is expecting that, and can't handle a possible IPv6
2301 being returned. Fixes bug 33804; bugfix on 0.4.3.1-alpha.
2303 o Minor bugfixes (key portability):
2304 - When reading PEM-encoded key data, tolerate CRLF line-endings even
2305 if we are not running on Windows. Previously, non-Windows hosts
2306 would reject these line-endings in certain positions, making
2307 certain key files hard to move from one host to another. Fixes bug
2308 33032; bugfix on 0.3.5.1-alpha.
2310 o Minor bugfixes (logging):
2311 - Flush stderr, stdout, and file logs during shutdown, if supported
2312 by the OS. This change helps make sure that any final logs are
2313 recorded. Fixes bug 33087; bugfix on 0.4.1.6.
2314 - Stop closing stderr and stdout during shutdown. Closing these file
2315 descriptors can hide sanitiser logs. Fixes bug 33087; bugfix
2318 o Minor bugfixes (onion services v3):
2319 - Relax severity of a log message that can appear naturally when
2320 decoding onion service descriptors as a relay. Also add some
2321 diagnostics to debug any future bugs in that area. Fixes bug
2322 31669; bugfix on 0.3.0.1-alpha.
2323 - Block a client-side assertion by disallowing the registration of
2324 an x25519 client auth key that's all zeroes. Fixes bug 33545;
2325 bugfix on 0.4.3.1-alpha. Based on patch from "cypherpunks".
2327 o Code simplification and refactoring:
2328 - Disable our coding standards best practices tracker in our git
2329 hooks. (0.4.3 branches only.) Closes ticket 33678.
2332 - Avoid conflicts between the fake sockets in tor's unit tests, and
2333 real file descriptors. Resolves issues running unit tests with
2334 GitHub Actions, where the process that embeds or launches the
2335 tests has already opened a large number of file descriptors. Fixes
2336 bug 33782; bugfix on 0.2.8.1-alpha. Found and fixed by
2340 - In our Appveyor Windows CI, copy required DLLs to test and app
2341 directories, before running tor's tests. This ensures that tor.exe
2342 and test*.exe use the correct version of each DLL. This fix is not
2343 required, but we hope it will avoid DLL search issues in future.
2344 Fixes bug 33673; bugfix on 0.3.4.2-alpha.
2345 - On Appveyor, skip the crypto/openssl_version test, which is
2346 failing because of a mismatched library installation. Fix
2350 Changes in version 0.4.3.3-alpha - 2020-03-18
2351 Tor 0.4.3.3-alpha fixes several bugs in previous releases, including
2352 TROVE-2020-002, a major denial-of-service vulnerability that affected
2353 all released Tor instances since 0.2.1.5-alpha. Using this
2354 vulnerability, an attacker could cause Tor instances to consume a huge
2355 amount of CPU, disrupting their operations for several seconds or
2356 minutes. This attack could be launched by anybody against a relay, or
2357 by a directory cache against any client that had connected to it. The
2358 attacker could launch this attack as much as they wanted, thereby
2359 disrupting service or creating patterns that could aid in traffic
2360 analysis. This issue was found by OSS-Fuzz, and is also tracked
2363 We do not have reason to believe that this attack is currently being
2364 exploited in the wild, but nonetheless we advise everyone to upgrade
2365 as soon as packages are available.
2367 o Major bugfixes (security, denial-of-service):
2368 - Fix a denial-of-service bug that could be used by anyone to
2369 consume a bunch of CPU on any Tor relay or authority, or by
2370 directories to consume a bunch of CPU on clients or hidden
2371 services. Because of the potential for CPU consumption to
2372 introduce observable timing patterns, we are treating this as a
2373 high-severity security issue. Fixes bug 33119; bugfix on
2374 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
2375 as TROVE-2020-002 and CVE-2020-10592.
2377 o Major bugfixes (circuit padding, memory leak):
2378 - Avoid a remotely triggered memory leak in the case that a circuit
2379 padding machine is somehow negotiated twice on the same circuit.
2380 Fixes bug 33619; bugfix on 0.4.0.1-alpha. Found by Tobias Pulls.
2381 This is also tracked as TROVE-2020-004 and CVE-2020-10593.
2383 o Major bugfixes (directory authority):
2384 - Directory authorities will now send a 503 (not enough bandwidth)
2385 code to clients when under bandwidth pressure. Known relays and
2386 other authorities will always be answered regardless of the
2387 bandwidth situation. Fixes bug 33029; bugfix on 0.1.2.5-alpha.
2389 o Minor features (diagnostic):
2390 - Improve assertions and add some memory-poisoning code to try to
2391 track down possible causes of a rare crash (32564) in the EWMA
2392 code. Closes ticket 33290.
2394 o Minor features (directory authorities):
2395 - Directory authorities now reject descriptors from relays running
2396 Tor versions from the 0.2.9 and 0.4.0 series. The 0.3.5 series is
2397 still allowed. Resolves ticket 32672. Patch by Neel Chauhan.
2399 o Minor features (usability):
2400 - Include more information when failing to parse a configuration
2401 value. This should make it easier to tell what's going wrong when
2402 a configuration file doesn't parse. Closes ticket 33460.
2404 o Minor bugfix (relay, configuration):
2405 - Warn if the ContactInfo field is not set, and tell the relay
2406 operator that not having a ContactInfo field set might cause their
2407 relay to get rejected in the future. Fixes bug 33361; bugfix
2410 o Minor bugfixes (coding best practices checks):
2411 - Allow the "practracker" script to read unicode files when using
2412 Python 2. We made the script use unicode literals in 0.4.3.1-alpha,
2413 but didn't change the codec for opening files. Fixes bug 33374;
2414 bugfix on 0.4.3.1-alpha.
2416 o Minor bugfixes (continuous integration):
2417 - Remove the buggy and unused mirroring job. Fixes bug 33213; bugfix
2420 o Minor bugfixes (onion service v3, client):
2421 - Remove a BUG() warning that would cause a stack trace if an onion
2422 service descriptor was freed while we were waiting for a
2423 rendezvous circuit to complete. Fixes bug 28992; bugfix
2426 o Minor bugfixes (onion services v3):
2427 - Fix an assertion failure that could result from a corrupted
2428 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
2429 bugfix on 0.3.3.1-alpha. This issue is also tracked
2432 o Documentation (manpage):
2433 - Alphabetize the Server and Directory server sections of the tor
2434 manpage. Also split Statistics options into their own section of
2435 the manpage. Closes ticket 33188. Work by Swati Thacker as part of
2436 Google Season of Docs.
2437 - Document the __OwningControllerProcess torrc option and specify
2438 its polling interval. Resolves issue 32971.
2440 o Testing (Travis CI):
2441 - Remove a redundant distcheck job. Closes ticket 33194.
2442 - Sort the Travis jobs in order of speed: putting the slowest jobs
2443 first takes full advantage of Travis job concurrency. Closes
2445 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
2446 previously configured to fast_finish (which requires
2447 allow_failure), to speed up the build. Closes ticket 33195.
2448 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
2449 tool to produce detailed diagnostic output. Closes ticket 32792.
2452 Changes in version 0.4.2.7 - 2020-03-18
2453 This is the third stable release in the 0.4.2.x series. It backports
2454 numerous fixes from later releases, including a fix for TROVE-2020-
2455 002, a major denial-of-service vulnerability that affected all
2456 released Tor instances since 0.2.1.5-alpha. Using this vulnerability,
2457 an attacker could cause Tor instances to consume a huge amount of CPU,
2458 disrupting their operations for several seconds or minutes. This
2459 attack could be launched by anybody against a relay, or by a directory
2460 cache against any client that had connected to it. The attacker could
2461 launch this attack as much as they wanted, thereby disrupting service
2462 or creating patterns that could aid in traffic analysis. This issue
2463 was found by OSS-Fuzz, and is also tracked as CVE-2020-10592.
2465 We do not have reason to believe that this attack is currently being
2466 exploited in the wild, but nonetheless we advise everyone to upgrade
2467 as soon as packages are available.
2469 o Major bugfixes (security, denial-of-service, backport from 0.4.3.3-alpha):
2470 - Fix a denial-of-service bug that could be used by anyone to
2471 consume a bunch of CPU on any Tor relay or authority, or by
2472 directories to consume a bunch of CPU on clients or hidden
2473 services. Because of the potential for CPU consumption to
2474 introduce observable timing patterns, we are treating this as a
2475 high-severity security issue. Fixes bug 33119; bugfix on
2476 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
2477 as TROVE-2020-002 and CVE-2020-10592.
2479 o Major bugfixes (circuit padding, memory leak, backport from 0.4.3.3-alpha):
2480 - Avoid a remotely triggered memory leak in the case that a circuit
2481 padding machine is somehow negotiated twice on the same circuit.
2482 Fixes bug 33619; bugfix on 0.4.0.1-alpha. Found by Tobias Pulls.
2483 This is also tracked as TROVE-2020-004 and CVE-2020-10593.
2485 o Major bugfixes (directory authority, backport from 0.4.3.3-alpha):
2486 - Directory authorities will now send a 503 (not enough bandwidth)
2487 code to clients when under bandwidth pressure. Known relays and
2488 other authorities will always be answered regardless of the
2489 bandwidth situation. Fixes bug 33029; bugfix on 0.1.2.5-alpha.
2491 o Minor features (continuous integration, backport from 0.4.3.2-alpha):
2492 - Stop allowing failures on the Travis CI stem tests job. It looks
2493 like all the stem hangs we were seeing before are now fixed.
2494 Closes ticket 33075.
2496 o Minor bugfixes (bridges, backport from 0.4.3.1-alpha):
2497 - Lowercase the configured value of BridgeDistribution before adding
2498 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
2500 o Minor bugfixes (logging, backport from 0.4.3.2-alpha):
2501 - If we encounter a bug when flushing a buffer to a TLS connection,
2502 only log the bug once per invocation of the Tor process.
2503 Previously we would log with every occurrence, which could cause
2504 us to run out of disk space. Fixes bug 33093; bugfix
2507 o Minor bugfixes (onion services v3, backport from 0.4.3.3-alpha):
2508 - Fix an assertion failure that could result from a corrupted
2509 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
2510 bugfix on 0.3.3.1-alpha. This issue is also tracked
2513 o Minor bugfixes (rust, build, backport from 0.4.3.2-alpha):
2514 - Fix a syntax warning given by newer versions of Rust that was
2515 creating problems for our continuous integration. Fixes bug 33212;
2516 bugfix on 0.3.5.1-alpha.
2518 o Testing (Travis CI, backport from 0.4.3.3-alpha):
2519 - Remove a redundant distcheck job. Closes ticket 33194.
2520 - Sort the Travis jobs in order of speed: putting the slowest jobs
2521 first takes full advantage of Travis job concurrency. Closes
2523 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
2524 previously configured to fast_finish (which requires
2525 allow_failure), to speed up the build. Closes ticket 33195.
2526 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
2527 tool to produce detailed diagnostic output. Closes ticket 32792.
2530 Changes in version 0.4.1.9 - 2020-03-18
2531 Tor 0.4.1.9 backports important fixes from later Tor releases,
2532 including a fix for TROVE-2020-002, a major denial-of-service
2533 vulnerability that affected all released Tor instances since
2534 0.2.1.5-alpha. Using this vulnerability, an attacker could cause Tor
2535 instances to consume a huge amount of CPU, disrupting their operations
2536 for several seconds or minutes. This attack could be launched by
2537 anybody against a relay, or by a directory cache against any client
2538 that had connected to it. The attacker could launch this attack as
2539 much as they wanted, thereby disrupting service or creating patterns
2540 that could aid in traffic analysis. This issue was found by OSS-Fuzz,
2541 and is also tracked as CVE-2020-10592.
2543 We do not have reason to believe that this attack is currently being
2544 exploited in the wild, but nonetheless we advise everyone to upgrade
2545 as soon as packages are available.
2547 o Major bugfixes (security, denial-of-service, backport from 0.4.3.3-alpha):
2548 - Fix a denial-of-service bug that could be used by anyone to
2549 consume a bunch of CPU on any Tor relay or authority, or by
2550 directories to consume a bunch of CPU on clients or hidden
2551 services. Because of the potential for CPU consumption to
2552 introduce observable timing patterns, we are treating this as a
2553 high-severity security issue. Fixes bug 33119; bugfix on
2554 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
2555 as TROVE-2020-002 and CVE-2020-10592.
2557 o Major bugfixes (circuit padding, memory leak, backport from 0.4.3.3-alpha):
2558 - Avoid a remotely triggered memory leak in the case that a circuit
2559 padding machine is somehow negotiated twice on the same circuit.
2560 Fixes bug 33619; bugfix on 0.4.0.1-alpha. Found by Tobias Pulls.
2561 This is also tracked as TROVE-2020-004 and CVE-2020-10593.
2563 o Minor bugfixes (bridges, backport from 0.4.3.1-alpha):
2564 - Lowercase the configured value of BridgeDistribution before adding
2565 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
2567 o Minor bugfixes (logging, backport from 0.4.3.2-alpha):
2568 - If we encounter a bug when flushing a buffer to a TLS connection,
2569 only log the bug once per invocation of the Tor process.
2570 Previously we would log with every occurrence, which could cause
2571 us to run out of disk space. Fixes bug 33093; bugfix
2574 o Minor bugfixes (onion services v3, backport from 0.4.3.3-alpha):
2575 - Fix an assertion failure that could result from a corrupted
2576 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
2577 bugfix on 0.3.3.1-alpha. This issue is also tracked
2580 o Minor bugfixes (rust, build, backport from 0.4.3.2-alpha):
2581 - Fix a syntax warning given by newer versions of Rust that was
2582 creating problems for our continuous integration. Fixes bug 33212;
2583 bugfix on 0.3.5.1-alpha.
2585 o Testing (Travis CI, backport from 0.4.3.3-alpha):
2586 - Remove a redundant distcheck job. Closes ticket 33194.
2587 - Sort the Travis jobs in order of speed: putting the slowest jobs
2588 first takes full advantage of Travis job concurrency. Closes
2590 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
2591 previously configured to fast_finish (which requires
2592 allow_failure), to speed up the build. Closes ticket 33195.
2593 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
2594 tool to produce detailed diagnostic output. Closes ticket 32792.
2597 Changes in version 0.3.5.10 - 2020-03-18
2598 Tor 0.3.5.10 backports many fixes from later Tor releases, including a
2599 fix for TROVE-2020-002, a major denial-of-service vulnerability that
2600 affected all released Tor instances since 0.2.1.5-alpha. Using this
2601 vulnerability, an attacker could cause Tor instances to consume a huge
2602 amount of CPU, disrupting their operations for several seconds or
2603 minutes. This attack could be launched by anybody against a relay, or
2604 by a directory cache against any client that had connected to it. The
2605 attacker could launch this attack as much as they wanted, thereby
2606 disrupting service or creating patterns that could aid in traffic
2607 analysis. This issue was found by OSS-Fuzz, and is also tracked
2610 We do not have reason to believe that this attack is currently being
2611 exploited in the wild, but nonetheless we advise everyone to upgrade
2612 as soon as packages are available.
2614 o Major bugfixes (security, denial-of-service, backport from 0.4.3.3-alpha):
2615 - Fix a denial-of-service bug that could be used by anyone to
2616 consume a bunch of CPU on any Tor relay or authority, or by
2617 directories to consume a bunch of CPU on clients or hidden
2618 services. Because of the potential for CPU consumption to
2619 introduce observable timing patterns, we are treating this as a
2620 high-severity security issue. Fixes bug 33119; bugfix on
2621 0.2.1.5-alpha. Found by OSS-Fuzz. We are also tracking this issue
2622 as TROVE-2020-002 and CVE-2020-10592.
2624 o Major bugfixes (linux seccomp sandbox, backport from 0.4.3.1-alpha):
2625 - Correct how we use libseccomp. Particularly, stop assuming that
2626 rules are applied in a particular order or that more rules are
2627 processed after the first match. Neither is the case! In
2628 libseccomp <2.4.0 this lead to some rules having no effect.
2629 libseccomp 2.4.0 changed how rules are generated, leading to a
2630 different ordering, which in turn led to a fatal crash during
2631 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
2634 o Minor features (continuous integration, backport from 0.4.3.2-alpha):
2635 - Stop allowing failures on the Travis CI stem tests job. It looks
2636 like all the stem hangs we were seeing before are now fixed.
2637 Closes ticket 33075.
2639 o Minor bugfixes (bridges, backport from 0.4.3.1-alpha):
2640 - Lowercase the configured value of BridgeDistribution before adding
2641 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
2643 o Minor bugfixes (crash, backport from 0.4.2.4-rc):
2644 - When running Tor with an option like --verify-config or
2645 --dump-config that does not start the event loop, avoid crashing
2646 if we try to exit early because of an error. Fixes bug 32407;
2647 bugfix on 0.3.3.1-alpha.
2649 o Minor bugfixes (logging, backport from 0.4.3.2-alpha):
2650 - If we encounter a bug when flushing a buffer to a TLS connection,
2651 only log the bug once per invocation of the Tor process.
2652 Previously we would log with every occurrence, which could cause
2653 us to run out of disk space. Fixes bug 33093; bugfix
2656 o Minor bugfixes (onion services v3, backport from 0.4.3.3-alpha):
2657 - Fix an assertion failure that could result from a corrupted
2658 ADD_ONION control port command. Found by Saibato. Fixes bug 33137;
2659 bugfix on 0.3.3.1-alpha. This issue is also tracked
2662 o Minor bugfixes (rust, build, backport from 0.4.3.2-alpha):
2663 - Fix a syntax warning given by newer versions of Rust that was
2664 creating problems for our continuous integration. Fixes bug 33212;
2665 bugfix on 0.3.5.1-alpha.
2667 o Testing (backport from 0.4.3.1-alpha):
2668 - Re-enable the Travis CI macOS Chutney build, but don't let it
2669 prevent the Travis job from finishing. (The Travis macOS jobs are
2670 slow, so we don't want to have it delay the whole CI process.)
2671 Closes ticket 32629.
2672 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
2673 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
2674 fix the sandbox errors in 32722. Closes ticket 32240.
2676 o Testing (continuous integration, backport from 0.4.3.1-alpha):
2677 - Use zstd in our Travis Linux builds. Closes ticket 32242.
2679 o Testing (Travis CI, backport from 0.4.3.3-alpha):
2680 - Remove a redundant distcheck job. Closes ticket 33194.
2681 - Sort the Travis jobs in order of speed: putting the slowest jobs
2682 first takes full advantage of Travis job concurrency. Closes
2684 - Stop allowing the Chutney IPv6 Travis job to fail. This job was
2685 previously configured to fast_finish (which requires
2686 - When a Travis chutney job fails, use chutney's new "diagnostics.sh"
2687 tool to produce detailed diagnostic output. Closes ticket 32792.
2690 Changes in version 0.4.3.2-alpha - 2020-02-10
2691 This is the second stable alpha release in the Tor 0.4.3.x series. It
2692 fixes several bugs present in the previous alpha release. Anybody
2693 running the previous alpha should upgrade, and look for bugs in this
2696 o Major bugfixes (onion service client, authorization):
2697 - On a NEWNYM signal, purge entries from the ephemeral client
2698 authorization cache. The permanent ones are kept. Fixes bug 33139;
2699 bugfix on 0.4.3.1-alpha.
2701 o Minor features (best practices tracker):
2702 - Practracker now supports a --regen-overbroad option to regenerate
2703 the exceptions file, but only to revise exceptions to be _less_
2704 tolerant of best-practices violations. Closes ticket 32372.
2706 o Minor features (continuous integration):
2707 - Run Doxygen Makefile target on Travis, so we can learn about
2708 regressions in our internal documentation. Closes ticket 32455.
2709 - Stop allowing failures on the Travis CI stem tests job. It looks
2710 like all the stem hangs we were seeing before are now fixed.
2711 Closes ticket 33075.
2713 o Minor bugfixes (build system):
2714 - Revise configure options that were either missing or incorrect in
2715 the configure summary. Fixes bug 32230; bugfix on 0.4.3.1-alpha.
2717 o Minor bugfixes (controller protocol):
2718 - Fix a memory leak introduced by refactoring of control reply
2719 formatting code. Fixes bug 33039; bugfix on 0.4.3.1-alpha.
2720 - Fix a memory leak in GETINFO responses. Fixes bug 33103; bugfix
2722 - When receiving "ACTIVE" or "DORMANT" signals on the control port,
2723 report them as SIGNAL events. Previously we would log a bug
2724 warning. Fixes bug 33104; bugfix on 0.4.0.1-alpha.
2726 o Minor bugfixes (logging):
2727 - If we encounter a bug when flushing a buffer to a TLS connection,
2728 only log the bug once per invocation of the Tor process.
2729 Previously we would log with every occurrence, which could cause
2730 us to run out of disk space. Fixes bug 33093; bugfix
2732 - When logging a bug, do not say "Future instances of this warning
2733 will be silenced" unless we are actually going to silence them.
2734 Previously we would say this whenever a BUG() check failed in the
2735 code. Fixes bug 33095; bugfix on 0.4.1.1-alpha.
2737 o Minor bugfixes (onion service v2):
2738 - Move a series of v2 onion service warnings to protocol-warning
2739 level because they can all be triggered remotely by a malformed
2740 request. Fixes bug 32706; bugfix on 0.1.1.14-alpha.
2742 o Minor bugfixes (onion service v3, client authorization):
2743 - When removing client authorization credentials using the control
2744 port, also remove the associated descriptor, so the onion service
2745 can no longer be contacted. Fixes bug 33148; bugfix
2748 o Minor bugfixes (pluggable transports):
2749 - When receiving a message on standard error from a pluggable
2750 transport, log it at info level, rather than as a warning. Fixes
2751 bug 33005; bugfix on 0.4.0.1-alpha.
2753 o Minor bugfixes (rust, build):
2754 - Fix a syntax warning given by newer versions of Rust that was
2755 creating problems for our continuous integration. Fixes bug 33212;
2756 bugfix on 0.3.5.1-alpha.
2758 o Minor bugfixes (TLS bug handling):
2759 - When encountering a bug in buf_read_from_tls(), return a "MISC"
2760 error code rather than "WANTWRITE". This change might help avoid
2761 some CPU-wasting loops if the bug is ever triggered. Bug reported
2762 by opara. Fixes bug 32673; bugfix on 0.3.0.4-alpha.
2764 o Code simplification and refactoring (mainloop):
2765 - Simplify the ip_address_changed() function by removing redundant
2766 checks. Closes ticket 33091.
2768 o Documentation (manpage):
2769 - Split "Circuit Timeout" options and "Node Selection" options into
2770 their own sections of the tor manpage. Closes tickets 32928 and
2771 32929. Work by Swati Thacker as part of Google Season of Docs.
2774 Changes in version 0.4.2.6 - 2020-01-30
2775 This is the second stable release in the 0.4.2.x series. It backports
2776 several bugfixes from 0.4.3.1-alpha, including some that had affected
2777 the Linux seccomp2 sandbox or Windows services. If you're running with
2778 one of those configurations, you'll probably want to upgrade;
2779 otherwise, you should be fine with 0.4.2.5.
2781 o Major bugfixes (linux seccomp sandbox, backport from 0.4.3.1-alpha):
2782 - Correct how we use libseccomp. Particularly, stop assuming that
2783 rules are applied in a particular order or that more rules are
2784 processed after the first match. Neither is the case! In
2785 libseccomp <2.4.0 this led to some rules having no effect.
2786 libseccomp 2.4.0 changed how rules are generated, leading to a
2787 different ordering, which in turn led to a fatal crash during
2788 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
2790 - Fix crash when reloading logging configuration while the
2791 experimental sandbox is enabled. Fixes bug 32841; bugfix on
2792 0.4.1.7. Patch by Peter Gerber.
2794 o Minor bugfixes (correctness checks, backport from 0.4.3.1-alpha):
2795 - Use GCC/Clang's printf-checking feature to make sure that
2796 tor_assertf() arguments are correctly typed. Fixes bug 32765;
2797 bugfix on 0.4.1.1-alpha.
2799 o Minor bugfixes (logging, crash, backport from 0.4.3.1-alpha):
2800 - Avoid a possible crash when trying to log a (fatal) assertion
2801 failure about mismatched magic numbers in configuration objects.
2802 Fixes bug 32771; bugfix on 0.4.2.1-alpha.
2804 o Minor bugfixes (testing, backport from 0.4.3.1-alpha):
2805 - When TOR_DISABLE_PRACTRACKER is set, do not apply it to the
2806 test_practracker.sh script. Doing so caused a test failure. Fixes
2807 bug 32705; bugfix on 0.4.2.1-alpha.
2808 - When TOR_DISABLE_PRACTRACKER is set, log a notice to stderr when
2809 skipping practracker checks. Fixes bug 32705; bugfix
2812 o Minor bugfixes (windows service, backport from 0.4.3.1-alpha):
2813 - Initialize the publish/subscribe system when running as a windows
2814 service. Fixes bug 32778; bugfix on 0.4.1.1-alpha.
2816 o Testing (backport from 0.4.3.1-alpha):
2817 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
2818 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
2819 fix the sandbox errors in 32722. Closes ticket 32240.
2820 - Re-enable the Travis CI macOS Chutney build, but don't let it
2821 prevent the Travis job from finishing. (The Travis macOS jobs are
2822 slow, so we don't want to have it delay the whole CI process.)
2823 Closes ticket 32629.
2825 o Testing (continuous integration, backport from 0.4.3.1-alpha):
2826 - Use zstd in our Travis Linux builds. Closes ticket 32242.
2829 Changes in version 0.4.1.8 - 2020-01-30
2830 This release backports several bugfixes from later release series,
2831 including some that had affected the Linux seccomp2 sandbox or Windows
2832 services. If you're running with one of those configurations, you'll
2833 probably want to upgrade; otherwise, you should be fine with your
2834 current version of 0.4.1.x.
2836 o Major bugfixes (linux seccomp sandbox, backport from 0.4.3.1-alpha):
2837 - Correct how we use libseccomp. Particularly, stop assuming that
2838 rules are applied in a particular order or that more rules are
2839 processed after the first match. Neither is the case! In
2840 libseccomp <2.4.0 this led to some rules having no effect.
2841 libseccomp 2.4.0 changed how rules are generated, leading to a
2842 different ordering, which in turn led to a fatal crash during
2843 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
2845 - Fix crash when reloading logging configuration while the
2846 experimental sandbox is enabled. Fixes bug 32841; bugfix on
2847 0.4.1.7. Patch by Peter Gerber.
2849 o Minor bugfixes (crash, backport form 0.4.2.4-rc):
2850 - When running Tor with an option like --verify-config or
2851 --dump-config that does not start the event loop, avoid crashing
2852 if we try to exit early because of an error. Fixes bug 32407;
2853 bugfix on 0.3.3.1-alpha.
2855 o Minor bugfixes (windows service, backport from 0.4.3.1-alpha):
2856 - Initialize the publish/subscribe system when running as a windows
2857 service. Fixes bug 32778; bugfix on 0.4.1.1-alpha.
2859 o Testing (backport from 0.4.3.1-alpha):
2860 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
2861 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
2862 fix the sandbox errors in 32722. Closes ticket 32240.
2863 - Re-enable the Travis CI macOS Chutney build, but don't let it
2864 prevent the Travis job from finishing. (The Travis macOS jobs are
2865 slow, so we don't want to have it delay the whole CI process.)
2866 Closes ticket 32629.
2868 o Testing (continuous integration, backport from 0.4.3.1-alpha):
2869 - Use zstd in our Travis Linux builds. Closes ticket 32242.
2872 Changes in version 0.4.3.1-alpha - 2020-01-22
2873 This is the first alpha release in the 0.4.3.x series. It includes
2874 improved support for application integration of onion services, support
2875 for building in a client-only mode, and newly improved internal
2876 documentation (online at https://src-ref.docs.torproject.org/tor/). It
2877 also has numerous other small bugfixes and features, as well as
2878 improvements to our code's internal organization that should help us
2879 write better code in the future.
2881 o New system requirements:
2882 - When building Tor, you now need to have Python 3 in order to run
2883 the integration tests. (Python 2 is officially unsupported
2884 upstream, as of 1 Jan 2020.) Closes ticket 32608.
2886 o Major features (build system):
2887 - The relay code can now be disabled using the --disable-module-relay
2888 configure option. When this option is set, we also disable the
2889 dirauth module. Closes ticket 32123.
2890 - When Tor is compiled --disable-module-relay, we also omit the code
2891 used to act as a directory cache. Closes ticket 32487.
2893 o Major features (directory authority, ed25519):
2894 - Add support for banning a relay's ed25519 keys in the approved-
2895 routers file. This will help us migrate away from RSA keys in the
2896 future. Previously, only RSA keys could be banned in approved-
2897 routers. Resolves ticket 22029. Patch by Neel Chauhan.
2899 o Major features (onion service, controller):
2900 - New control port commands to manage client-side onion service
2901 authorization credentials. The ONION_CLIENT_AUTH_ADD command adds
2902 a credential, ONION_CLIENT_AUTH_REMOVE deletes a credential, and
2903 ONION_CLIENT_AUTH_VIEW lists the credentials. Closes ticket 30381.
2905 o Major features (onion service, SOCKS5):
2906 - Introduce a new SocksPort flag, ExtendedErrors, to support more
2907 detailed error codes in information for applications that support
2908 them. Closes ticket 30382; implements proposal 304.
2910 o Major features (proxy):
2911 - In addition to its current supported proxy types (HTTP CONNECT,
2912 SOCKS4, and SOCKS5), Tor can now make its OR connections through a
2913 HAProxy server. A new torrc option was added to specify the
2914 address/port of the server: TCPProxy <protocol> <host>:<port>.
2915 Currently the only supported protocol for the option is haproxy.
2916 Closes ticket 31518. Patch done by Suphanat Chunhapanya (haxxpop).
2918 o Major bugfixes (linux seccomp sandbox):
2919 - Correct how we use libseccomp. Particularly, stop assuming that
2920 rules are applied in a particular order or that more rules are
2921 processed after the first match. Neither is the case! In
2922 libseccomp <2.4.0 this led to some rules having no effect.
2923 libseccomp 2.4.0 changed how rules are generated, leading to a
2924 different ordering, which in turn led to a fatal crash during
2925 startup. Fixes bug 29819; bugfix on 0.2.5.1-alpha. Patch by
2927 - Fix crash when reloading logging configuration while the
2928 experimental sandbox is enabled. Fixes bug 32841; bugfix on
2929 0.4.1.7. Patch by Peter Gerber.
2931 o Major bugfixes (networking):
2932 - Correctly handle IPv6 addresses in SOCKS5 RESOLVE_PTR requests,
2933 and accept strings as well as binary addresses. Fixes bug 32315;
2934 bugfix on 0.3.5.1-alpha.
2936 o Major bugfixes (onion service):
2937 - Report HS circuit failure back into the HS subsystem so we take
2938 appropriate action with regards to the client introduction point
2939 failure cache. This improves reachability of onion services, since
2940 now clients notice failing introduction circuits properly. Fixes
2941 bug 32020; bugfix on 0.3.2.1-alpha.
2943 o Minor feature (configure, build system):
2944 - Output a list of enabled/disabled features at the end of the
2945 configure process in a pleasing way. Closes ticket 31373.
2947 o Minor feature (heartbeat, onion service):
2948 - Add the DoS INTRODUCE2 defenses counter to the heartbeat DoS
2949 message. Closes ticket 31371.
2951 o Minor features (configuration validation):
2952 - Configuration validation can now be done by per-module callbacks,
2953 rather than a global validation function. This will let us reduce
2954 the size of config.c and some of its more cumbersome functions.
2955 Closes ticket 31241.
2957 o Minor features (configuration):
2958 - If a configured hardware crypto accelerator in AccelName is
2959 prefixed with "!", Tor now exits when it cannot be found. Closes
2961 - We now use flag-driven logic to warn about obsolete configuration
2962 fields, so that we can include their names. In 0.4.2, we used a
2963 special type, which prevented us from generating good warnings.
2964 Implements ticket 32404.
2966 o Minor features (controller):
2967 - Add stream isolation data to STREAM event. Closes ticket 19859.
2968 - Implement a new GETINFO command to fetch microdescriptor
2969 consensus. Closes ticket 31684.
2971 o Minor features (debugging, directory system):
2972 - Don't crash when we find a non-guard with a guard-fraction value
2973 set. Instead, log a bug warning, in an attempt to figure out how
2974 this happened. Diagnostic for ticket 32868.
2976 o Minor features (defense in depth):
2977 - Add additional checks around tor_vasprintf() usage, in case the
2978 function returns an error. Patch by Tobias Stoeckmann. Fixes
2981 o Minor features (developer tooling):
2982 - Remove the 0.2.9.x series branches from git scripts (git-merge-
2983 forward.sh, git-pull-all.sh, git-push-all.sh, git-setup-dirs.sh).
2984 Closes ticket 32772.
2986 o Minor features (developer tools):
2987 - Add a check_cocci_parse.sh script that checks that new code is
2988 parseable by Coccinelle. Add an exceptions file for unparseable
2989 files, and run the script from travis CI. Closes ticket 31919.
2990 - Call the check_cocci_parse.sh script from a 'check-cocci' Makefile
2991 target. Closes ticket 31919.
2992 - Add a rename_c_identifiers.py tool to rename a bunch of C
2993 identifiers at once, and generate a well-formed commit message
2994 describing the change. This should help with refactoring. Closes
2996 - Add some scripts in "scripts/coccinelle" to invoke the Coccinelle
2997 semantic patching tool with the correct flags. These flags are
2998 fairly easy to forget, and these scripts should help us use
2999 Coccinelle more effectively in the future. Closes ticket 31705.
3001 o Minor features (Doxygen):
3002 - Update Doxygen configuration file to a more recent template (from
3003 1.8.15). Closes ticket 32110.
3004 - "make doxygen" now works with out-of-tree builds. Closes
3006 - Make sure that doxygen outputs documentation for all of our C
3007 files. Previously, some were missing @file declarations, causing
3008 them to be ignored. Closes ticket 32307.
3009 - Our "make doxygen" target now respects --enable-fatal-warnings by
3010 default, and does not warn about items that are missing
3011 documentation. To warn about missing documentation, run configure
3012 with the "--enable-missing-doc-warnings" flag: doing so suspends
3013 fatal warnings for doxygen. Closes ticket 32385.
3015 o Minor features (git scripts):
3016 - Add TOR_EXTRA_CLONE_ARGS to git-setup-dirs.sh for git clone
3017 customisation. Closes ticket 32347.
3018 - Add git-setup-dirs.sh, which sets up an upstream git repository
3019 and worktrees for tor maintainers. Closes ticket 29603.
3020 - Add TOR_EXTRA_REMOTE_* to git-setup-dirs.sh for a custom extra
3021 remote. Closes ticket 32347.
3022 - Call the check_cocci_parse.sh script from the git commit and push
3023 hooks. Closes ticket 31919.
3024 - Make git-push-all.sh skip unchanged branches when pushing to
3025 upstream. The script already skipped unchanged test branches.
3026 Closes ticket 32216.
3027 - Make git-setup-dirs.sh create a master symlink in the worktree
3028 directory. Closes ticket 32347.
3029 - Skip unmodified source files when doing some existing git hook
3030 checks. Related to ticket 31919.
3032 o Minor features (IPv6, client):
3033 - Make Tor clients tell dual-stack exits that they prefer IPv6
3034 connections. This change is equivalent to setting the PreferIPv6
3035 flag on SOCKSPorts (and most other listener ports). Tor Browser
3036 has been setting this flag for some time, and we want to remove a
3037 client distinguisher at exits. Closes ticket 32637.
3039 o Minor features (portability, android):
3040 - When building for Android, disable some tests that depend on $HOME
3041 and/or pwdb, which Android doesn't have. Closes ticket 32825.
3042 Patch from Hans-Christoph Steiner.
3044 o Minor features (relay modularity):
3045 - Split the relay and server pluggable transport config code into
3046 separate files in the relay module. Disable this code when the
3047 relay module is disabled. Closes part of ticket 32213.
3048 - When the relay module is disabled, reject attempts to set the
3049 ORPort, DirPort, DirCache, BridgeRelay, ExtORPort, or
3050 ServerTransport* options, rather than ignoring the values of these
3051 options. Closes part of ticket 32213.
3053 o Minor features (relay):
3054 - When the relay module is disabled, change the default config so
3055 that DirCache is 0, and ClientOnly is 1. Closes ticket 32410.
3057 o Minor features (release tools):
3058 - Port our ChangeLog formatting and sorting tools to Python 3.
3059 Closes ticket 32704.
3061 o Minor features (testing):
3062 - Detect some common failure cases for test_parseconf.sh in
3063 src/test/conf_failures. Closes ticket 32451.
3064 - Allow test_parseconf.sh to test expected log outputs for successful
3065 configs, as well as failed configs. Closes ticket 32451.
3066 - The test_parseconf.sh script now supports result variants for any
3067 combination of the optional libraries lzma, nss, and zstd. Closes
3070 o Minor features (tests, Android):
3071 - When running the unit tests on Android, create temporary files in
3072 a subdirectory of /data/local/tmp. Closes ticket 32172. Based on a
3073 patch from Hans-Christoph Steiner.
3075 o Minor bugfixes (bridges):
3076 - Lowercase the configured value of BridgeDistribution before adding
3077 it to the descriptor. Fixes bug 32753; bugfix on 0.3.2.3-alpha.
3079 o Minor bugfixes (build system):
3080 - Fix "make autostyle" for out-of-tree builds. Fixes bug 32370;
3081 bugfix on 0.4.1.2-alpha.
3083 o Minor bugfixes (configuration handling):
3084 - Make control_event_conf_changed() take in a config_line_t instead
3085 of a smartlist of alternating key/value entries. Fixes bug 31531;
3086 bugfix on 0.2.3.3-alpha. Patch by Neel Chauhan.
3088 o Minor bugfixes (configuration):
3089 - Check for multiplication overflow when parsing memory units inside
3090 configuration. Fixes bug 30920; bugfix on 0.0.9rc1.
3091 - When dumping the configuration, stop adding a trailing space after
3092 the option name when there is no option value. This issue only
3093 affects options that accept an empty value or list. (Most options
3094 reject empty values, or delete the entire line from the dumped
3095 options.) Fixes bug 32352; bugfix on 0.0.9pre6.
3096 - Avoid changing the user's value of HardwareAccel as stored by
3097 SAVECONF, when AccelName is set but HardwareAccel is not. Fixes
3098 bug 32382; bugfix on 0.2.2.1-alpha.
3099 - When creating a KeyDirectory with the same location as the
3100 DataDirectory (not recommended), respect the DataDirectory's
3101 group-readable setting if one has not been set for the
3102 KeyDirectory. Fixes bug 27992; bugfix on 0.3.3.1-alpha.
3104 o Minor bugfixes (controller):
3105 - In routerstatus_has_changed(), check all the fields that are
3106 output over the control port. Fixes bug 20218; bugfix
3109 o Minor bugfixes (correctness checks):
3110 - Use GCC/Clang's printf-checking feature to make sure that
3111 tor_assertf() arguments are correctly typed. Fixes bug 32765;
3112 bugfix on 0.4.1.1-alpha.
3114 o Minor bugfixes (developer tools):
3115 - Allow paths starting with ./ in scripts/add_c_file.py. Fixes bug
3116 31336; bugfix on 0.4.1.2-alpha.
3118 o Minor bugfixes (dirauth module):
3119 - Split the dirauth config code into a separate file in the dirauth
3120 module. Disable this code when the dirauth module is disabled.
3121 Closes ticket 32213.
3122 - When the dirauth module is disabled, reject attempts to set the
3123 AuthoritativeDir option, rather than ignoring the value of the
3124 option. Fixes bug 32213; bugfix on 0.3.4.1-alpha.
3126 o Minor bugfixes (embedded Tor):
3127 - When starting Tor any time after the first time in a process,
3128 register the thread in which it is running as the main thread.
3129 Previously, we only did this on Windows, which could lead to bugs
3130 like 23081 on non-Windows platforms. Fixes bug 32884; bugfix
3133 o Minor bugfixes (git scripts):
3134 - Avoid sleeping before the last push in git-push-all.sh. Closes
3136 - Forward all unrecognised arguments in git-push-all.sh to git push.
3137 Closes ticket 32216.
3139 o Minor bugfixes (hidden service v3):
3140 - Do not rely on a "circuit established" flag for intro circuits but
3141 instead always query the HS circuit map. This is to avoid sync
3142 issue with that flag and the map. Fixes bug 32094; bugfix
3145 o Minor bugfixes (logging, crash):
3146 - Avoid a possible crash when trying to log a (fatal) assertion
3147 failure about mismatched magic numbers in configuration objects.
3148 Fixes bug 32771; bugfix on 0.4.2.1-alpha.
3150 o Minor bugfixes (onion service v2):
3151 - When sending the INTRO cell for a v2 Onion Service, look at the
3152 failure cache alongside timeout values to check if the intro point
3153 is marked as failed. Previously, we only looked at the relay
3154 timeout values. Fixes bug 25568; bugfix on 0.2.7.3-rc. Patch by
3157 o Minor bugfixes (onion services v3, client):
3158 - Properly handle the client rendezvous circuit timeout. Previously
3159 Tor would sometimes timeout a rendezvous circuit awaiting the
3160 introduction ACK, and find itself unable to re-establish all
3161 circuits because the rendezvous circuit timed out too early. Fixes
3162 bug 32021; bugfix on 0.3.2.1-alpha.
3164 o Minor bugfixes (onion services):
3165 - In cancel_descriptor_fetches(), use
3166 connection_list_by_type_purpose() instead of
3167 connection_list_by_type_state(). Fixes bug 32639; bugfix on
3168 0.3.2.1-alpha. Patch by Neel Chauhan.
3170 o Minor bugfixes (scripts):
3171 - Fix update_versions.py for out-of-tree builds. Fixes bug 32371;
3172 bugfix on 0.4.0.1-alpha.
3174 o Minor bugfixes (test):
3175 - Use the same code to find the tor binary in all of our test
3176 scripts. This change makes sure we are always using the coverage
3177 binary when coverage is enabled. Fixes bug 32368; bugfix
3180 o Minor bugfixes (testing):
3181 - Stop ignoring "tor --dump-config" errors in test_parseconf.sh.
3182 Fixes bug 32468; bugfix on 0.4.2.1-alpha.
3183 - When TOR_DISABLE_PRACTRACKER is set, do not apply it to the
3184 test_practracker.sh script. Doing so caused a test failure. Fixes
3185 bug 32705; bugfix on 0.4.2.1-alpha.
3186 - When TOR_DISABLE_PRACTRACKER is set, log a notice to stderr when
3187 skipping practracker checks. Fixes bug 32705; bugfix
3190 o Minor bugfixes (tests):
3191 - Our option-validation tests no longer depend on specially
3192 configured non-default, non-passing sets of options. Previously,
3193 the tests had been written to assume that options would _not_ be
3194 set to their defaults, which led to needless complexity and
3195 verbosity. Fixes bug 32175; bugfix on 0.2.8.1-alpha.
3197 o Minor bugfixes (windows service):
3198 - Initialize the publish/subscribe system when running as a windows
3199 service. Fixes bug 32778; bugfix on 0.4.1.1-alpha.
3201 o Deprecated features:
3202 - Deprecate the ClientAutoIPv6ORPort option. This option was not
3203 true "Happy Eyeballs", and often failed on connections that
3204 weren't reliably dual-stack. Closes ticket 32942. Patch by
3208 - Provide a quickstart guide for a Circuit Padding Framework, and
3209 documentation for researchers to implement and study circuit
3210 padding machines. Closes ticket 28804.
3211 - Add documentation in 'HelpfulTools.md' to describe how to build a
3212 tag file. Closes ticket 32779.
3213 - Create a high-level description of the long-term software
3214 architecture goals. Closes ticket 32206.
3215 - Describe the --dump-config command in the manual page. Closes
3217 - Unite coding advice from this_not_that.md in torguts repo into our
3218 coding standards document. Resolves ticket 31853.
3221 - Our Doxygen configuration no longer generates LaTeX output. The
3222 reference manual produced by doing this was over 4000 pages long,
3223 and generally unusable. Closes ticket 32099.
3224 - The option "TestingEstimatedDescriptorPropagationTime" is now
3225 marked as obsolete. It has had no effect since 0.3.0.7, when
3226 clients stopped rejecting consensuses "from the future". Closes
3228 - We no longer support consensus methods before method 28; these
3229 methods were only used by authorities running versions of Tor that
3230 are now at end-of-life. In effect, this means that clients,
3231 relays, and authorities now assume that authorities will be
3232 running version 0.3.5.x or later. Closes ticket 32695.
3235 - Add more test cases for tor's UTF-8 validation function. Also,
3236 check the arguments passed to the function for consistency. Closes
3238 - Improve test coverage for relay and dirauth config code, focusing
3239 on option validation and normalization. Closes ticket 32213.
3240 - Improve the consistency of test_parseconf.sh output, and run all
3241 the tests, even if one fails. Closes ticket 32213.
3242 - Re-enable the Travis CI macOS Chutney build, but don't let it
3243 prevent the Travis job from finishing. (The Travis macOS jobs are
3244 slow, so we don't want to have it delay the whole CI process.)
3245 Closes ticket 32629.
3246 - Run the practracker unit tests in the pre-commit git hook. Closes
3248 - Turn off Tor's Sandbox in Chutney jobs, and run those jobs on
3249 Ubuntu Bionic. Turning off the Sandbox is a work-around, until we
3250 fix the sandbox errors in 32722. Closes ticket 32240.
3252 o Code simplification and refactoring (channel):
3253 - Channel layer had a variable length cell handler that was not used
3254 and thus removed. Closes ticket 32892.
3256 o Code simplification and refactoring (configuration):
3257 - Immutability is now implemented as a flag on individual
3258 configuration options rather than as part of the option-transition
3259 checking code. Closes ticket 32344.
3260 - Instead of keeping a list of configuration options to check for
3261 relative paths, check all the options whose type is "FILENAME".
3262 Solves part of ticket 32339.
3263 - Our default log (which ordinarily sends NOTICE-level messages to
3264 standard output) is now handled in a more logical manner.
3265 Previously, we replaced the configured log options if they were
3266 empty. Now, we interpret an empty set of log options as meaning
3267 "use the default log". Closes ticket 31999.
3268 - Remove some unused arguments from the options_validate() function,
3269 to simplify our code and tests. Closes ticket 32187.
3270 - Simplify the options_validate() code so that it looks at the
3271 default options directly, rather than taking default options as an
3272 argument. This change lets us simplify its interface. Closes
3274 - Use our new configuration architecture to move most authority-
3275 related options to the directory authority module. Closes
3277 - When parsing the command line, handle options that determine our
3278 "quiet level" and our mode of operation (e.g., --dump-config and
3279 so on) all in one table. Closes ticket 32003.
3281 o Code simplification and refactoring (controller):
3282 - Create a new abstraction for formatting control protocol reply
3283 lines based on key-value pairs. Refactor some existing control
3284 protocol code to take advantage of this. Closes ticket 30984.
3285 - Create a helper function that can fetch network status or
3286 microdesc consensuses. Closes ticket 31684.
3288 o Code simplification and refactoring (dirauth modularization):
3289 - Remove the last remaining HAVE_MODULE_DIRAUTH inside a function.
3290 Closes ticket 32163.
3291 - Replace some confusing identifiers in process_descs.c. Closes
3293 - Simplify some relay and dirauth config code. Closes ticket 32213.
3295 o Code simplification and refactoring (misc):
3296 - Make all the structs we declare follow the same naming convention
3297 of ending with "_t". Closes ticket 32415.
3298 - Move and rename some configuration-related code for clarity.
3299 Closes ticket 32304.
3300 - Our include.am files are now broken up by subdirectory.
3301 Previously, src/core/include.am covered all of the subdirectories
3302 in "core", "feature", and "app". Closes ticket 32137.
3303 - Remove underused NS*() macros from test code: they make our tests
3304 more confusing, especially for code-formatting tools. Closes
3307 o Code simplification and refactoring (relay modularization):
3308 - Disable relay_periodic when the relay module is disabled. Closes
3310 - Disable relay_sys when the relay module is disabled. Closes
3313 o Code simplification and refactoring (tool support):
3314 - Add numerous missing dependencies to our include files, so that
3315 they can be included in different reasonable orders and still
3316 compile. Addresses part of ticket 32764.
3317 - Fix some parts of our code that were difficult for Coccinelle to
3318 parse. Related to ticket 31705.
3319 - Fix some small issues in our code that prevented automatic
3320 formatting tools from working. Addresses part of ticket 32764.
3322 o Documentation (manpage):
3323 - Alphabetize the Client Options section of the tor manpage. Closes
3325 - Alphabetize the General Options section of the tor manpage. Closes
3327 - In the tor(1) manpage, reword and improve formatting of the
3328 COMMAND-LINE OPTIONS and DESCRIPTION sections. Closes ticket
3329 32277. Based on work by Swati Thacker as part of Google Season
3331 - In the tor(1) manpage, reword and improve formatting of the FILES,
3332 SEE ALSO, and BUGS sections. Closes ticket 32176. Based on work by
3333 Swati Thacker as part of Google Season of Docs.
3335 o Testing (circuit, EWMA):
3336 - Add unit tests for circuitmux and EWMA subsystems. Closes
3339 o Testing (continuous integration):
3340 - Use zstd in our Travis Linux builds. Closes ticket 32242.
3343 Changes in version 0.4.2.5 - 2019-12-09
3344 This is the first stable release in the 0.4.2.x series. This series
3345 improves reliability and stability, and includes several stability and
3346 correctness improvements for onion services. It also fixes many smaller
3347 bugs present in previous series.
3349 Per our support policy, we will support the 0.4.2.x series for nine
3350 months, or until three months after the release of a stable 0.4.3.x:
3351 whichever is longer. If you need longer-term support, please stick
3352 with 0.3.5.x, which will we plan to support until Feb 2022.
3354 Per our support policy, we will support the 0.4.2.x series for nine
3355 months, or until three months after the release of a stable 0.4.3.x:
3356 whichever is longer. If you need longer-term support, please stick
3357 with 0.3.5.x, which will we plan to support until Feb 2022.
3359 Below are the changes since 0.4.1.4-rc. For a complete list of changes
3360 since 0.4.1.5, see the ReleaseNotes file.
3362 o Minor features (geoip):
3363 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
3364 Country database. Closes ticket 32685.
3367 - Require C99 standards-conforming code in Travis CI, but allow GNU
3368 gcc extensions. Also activates clang's -Wtypedef-redefinition
3369 warnings. Build some jobs with -std=gnu99, and some jobs without.
3370 Closes ticket 32500.
3373 Changes in version 0.4.1.7 - 2019-12-09
3374 This release backports several bugfixes to improve stability and
3375 correctness. Anyone experiencing build problems or crashes with 0.4.1.6,
3376 including all relays relying on AccountingMax, should upgrade.
3378 o Major features (directory authorities, backport from 0.4.2.2-alpha):
3379 - Directory authorities now reject relays running all currently
3380 deprecated release series. The currently supported release series
3381 are: 0.2.9, 0.3.5, 0.4.0, 0.4.1, and 0.4.2. Closes ticket 31549.
3383 o Major bugfixes (embedded Tor, backport from 0.4.2.2-alpha):
3384 - Avoid a possible crash when restarting Tor in embedded mode and
3385 enabling a different set of publish/subscribe messages. Fixes bug
3386 31898; bugfix on 0.4.1.1-alpha.
3388 o Major bugfixes (relay, backport from 0.4.2.3-alpha):
3389 - Relays now respect their AccountingMax bandwidth again. When
3390 relays entered "soft" hibernation (which typically starts when
3391 we've hit 90% of our AccountingMax), we had stopped checking
3392 whether we should enter hard hibernation. Soft hibernation refuses
3393 new connections and new circuits, but the existing circuits can
3394 continue, meaning that relays could have exceeded their configured
3395 AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha.
3397 o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha):
3398 - Stop ignoring torrc options after an %include directive, when the
3399 included directory ends with a file that does not contain any
3400 config options (but does contain comments or whitespace). Fixes
3401 bug 31408; bugfix on 0.3.1.1-alpha.
3403 o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha):
3404 - Onion services now always use the exact number of intro points
3405 configured with the HiddenServiceNumIntroductionPoints option (or
3406 fewer if nodes are excluded). Before, a service could sometimes
3407 pick more intro points than configured. Fixes bug 31548; bugfix
3410 o Minor features (continuous integration, backport from 0.4.2.2-alpha):
3411 - When building on Appveyor and Travis, pass the "-k" flag to make,
3412 so that we are informed of all compilation failures, not just the
3413 first one or two. Closes ticket 31372.
3415 o Minor features (geoip, backport from 0.4.2.5):
3416 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
3417 Country database. Closes ticket 32685.
3419 o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha):
3420 - Avoid spurious errors when Appveyor CI fails before the install step.
3421 Fixes bug 31884; bugfix on 0.3.4.2-alpha.
3423 o Minor bugfixes (client, onion service v3, backport from 0.4.2.4-rc):
3424 - Fix a BUG() assertion that occurs within a very small race window
3425 between when a client intro circuit opens and when its descriptor
3426 gets cleaned up from the cache. The circuit is now closed early,
3427 which will trigger a re-fetch of the descriptor and continue the
3428 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
3430 o Minor bugfixes (connections, backport from 0.4.2.3-rc):
3431 - Avoid trying to read data from closed connections, which can cause
3432 needless loops in Libevent and infinite loops in Shadow. Fixes bug
3433 30344; bugfix on 0.1.1.1-alpha.
3435 o Minor bugfixes (error handling, backport from 0.4.2.1-alpha):
3436 - On abort, try harder to flush the output buffers of log messages.
3437 On some platforms (macOS), log messages could be discarded when
3438 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
3439 - Report the tor version whenever an assertion fails. Previously, we
3440 only reported the Tor version on some crashes, and some non-fatal
3441 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
3442 - When tor aborts due to an error, close log file descriptors before
3443 aborting. Closing the logs makes some OSes flush log file buffers,
3444 rather than deleting buffered log lines. Fixes bug 31594; bugfix
3447 o Minor bugfixes (logging, backport from 0.4.2.2-alpha):
3448 - Add a missing check for HAVE_PTHREAD_H, because the backtrace code
3449 uses mutexes. Fixes bug 31614; bugfix on 0.2.5.2-alpha.
3450 - Disable backtrace signal handlers when shutting down tor. Fixes
3451 bug 31614; bugfix on 0.2.5.2-alpha.
3452 - Rate-limit our the logging message about the obsolete .exit
3453 notation. Previously, there was no limit on this warning, which
3454 could potentially be triggered many times by a hostile website.
3455 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
3457 o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha):
3458 - Do not log a nonfatal assertion failure when receiving a VERSIONS
3459 cell on a connection using the obsolete v1 link protocol. Log a
3460 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
3462 o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha):
3463 - Reset the periodic events' "enabled" flag when Tor is shut down
3464 cleanly. Previously, this flag was left on, which caused periodic
3465 events not to be re-enabled when Tor was relaunched in-process
3466 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
3469 o Minor bugfixes (multithreading, backport from 0.4.2.2-alpha):
3470 - Avoid some undefined behaviour when freeing mutexes. Fixes bug
3471 31736; bugfix on 0.0.7.
3473 o Minor bugfixes (process management, backport from 0.4.2.3-alpha):
3474 - Remove overly strict assertions that triggered when a pluggable
3475 transport failed to launch. Fixes bug 31091; bugfix
3477 - Remove an assertion in the Unix process backend. This assertion
3478 would trigger when we failed to find the executable for a child
3479 process. Fixes bug 31810; bugfix on 0.4.0.1-alpha.
3481 o Minor bugfixes (relay, backport from 0.4.2.2-alpha):
3482 - Avoid crashing when starting with a corrupt keys directory where
3483 the old ntor key and the new ntor key are identical. Fixes bug
3484 30916; bugfix on 0.2.4.8-alpha.
3486 o Minor bugfixes (testing, backport from 0.4.2.3-alpha):
3487 - When testing port rebinding, don't busy-wait for tor to log.
3488 Instead, actually sleep for a short time before polling again.
3489 Also improve the formatting of control commands and log messages.
3490 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
3492 o Minor bugfixes (tests, SunOS, backport from 0.4.2.2-alpha):
3493 - Avoid a map_anon_nofork test failure due to a signed/unsigned
3494 integer comparison. Fixes bug 31897; bugfix on 0.4.1.1-alpha.
3496 o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha):
3497 - Log bugs about the TLS read buffer's length only once, rather than
3498 filling the logs with similar warnings. Fixes bug 31939; bugfix
3501 o Documentation (backport from 0.4.2.2-alpha):
3502 - Explain why we can't destroy the backtrace buffer mutex. Explain
3503 why we don't need to destroy the log mutex. Closes ticket 31736.
3505 o Testing (continuous integration, backport from 0.4.2.3-alpha):
3506 - Disable all but one Travis CI macOS build, to mitigate slow
3507 scheduling of Travis macOS jobs. Closes ticket 32177.
3508 - Run the chutney IPv6 networks as part of Travis CI. Closes
3510 - Simplify the Travis CI build matrix, and optimise for build time.
3511 Closes ticket 31859.
3512 - Use Windows Server 2019 instead of Windows Server 2016 in our
3513 Appveyor builds. Closes ticket 32086.
3515 o Testing (continuous integration, backport from 0.4.2.4-rc):
3516 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
3517 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
3518 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
3519 until we can fix some Bionic permissions issues (see ticket
3520 32240). Related to ticket 31919.
3521 - Install the mingw OpenSSL package in Appveyor. This makes sure
3522 that the OpenSSL headers and libraries match in Tor's Appveyor
3523 builds. (This bug was triggered by an Appveyor image update.)
3524 Fixes bug 32449; bugfix on 0.3.5.6-rc.
3526 o Testing (continuous integration, backport from 0.4.2.5):
3527 - Require C99 standards-conforming code in Travis CI, but allow GNU gcc
3528 extensions. Also activates clang's -Wtypedef-redefinition warnings.
3529 Build some jobs with -std=gnu99, and some jobs without.
3530 Closes ticket 32500.
3533 Changes in version 0.4.0.6 - 2019-12-09
3534 This is the second stable release in the 0.4.0.x series. This release
3535 backports several bugfixes to improve stability and correctness. Anyone
3536 experiencing build problems or crashes with 0.4.0.5, including all relays
3537 relying on AccountingMax, should upgrade.
3539 Note that, per our support policy, support for the 0.4.0.x series will end
3540 on 2 Feb 2020. Anyone still running 0.4.0.x should plan to upgrade to the
3541 latest stable release, or downgrade to 0.3.5.x, which will get long-term
3542 support until 1 Feb 2022.
3544 o Directory authority changes (backport from 0.4.1.5):
3545 - The directory authority "dizum" has a new IP address. Closes
3548 o Major bugfixes (bridges, backport from 0.4.1.2-alpha):
3549 - Consider our directory information to have changed when our list
3550 of bridges changes. Previously, Tor would not re-compute the
3551 status of its directory information when bridges changed, and
3552 therefore would not realize that it was no longer able to build
3553 circuits. Fixes part of bug 29875.
3554 - Do not count previously configured working bridges towards our
3555 total of working bridges. Previously, when Tor's list of bridges
3556 changed, it would think that the old bridges were still usable,
3557 and delay fetching router descriptors for the new ones. Fixes part
3558 of bug 29875; bugfix on 0.3.0.1-alpha.
3560 o Major bugfixes (circuit build, guard, backport from 0.4.1.4-rc):
3561 - When considering upgrading circuits from "waiting for guard" to
3562 "open", always ignore circuits that are marked for close. Otherwise,
3563 we can end up in the situation where a subsystem is notified that
3564 a closing circuit has just opened, leading to undesirable
3565 behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha.
3567 o Major bugfixes (Onion service reachability, backport from 0.4.1.3-alpha):
3568 - Properly clean up the introduction point map when circuits change
3569 purpose from onion service circuits to pathbias, measurement, or
3570 other circuit types. This should fix some service-side instances
3571 of introduction point failure. Fixes bug 29034; bugfix
3574 o Major bugfixes (onion service v3, backport from 0.4.1.1-alpha):
3575 - Fix an unreachable bug in which an introduction point could try to
3576 send an INTRODUCE_ACK with a status code that Trunnel would refuse
3577 to encode, leading the relay to assert(). We've consolidated the
3578 ABI values into Trunnel now. Fixes bug 30454; bugfix
3580 - Clients can now handle unknown status codes from INTRODUCE_ACK
3581 cells. (The NACK behavior will stay the same.) This will allow us
3582 to extend status codes in the future without breaking the normal
3583 client behavior. Fixes another part of bug 30454; bugfix
3586 o Major bugfixes (relay, backport from 0.4.2.3-alpha):
3587 - Relays now respect their AccountingMax bandwidth again. When
3588 relays entered "soft" hibernation (which typically starts when
3589 we've hit 90% of our AccountingMax), we had stopped checking
3590 whether we should enter hard hibernation. Soft hibernation refuses
3591 new connections and new circuits, but the existing circuits can
3592 continue, meaning that relays could have exceeded their configured
3593 AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha.
3595 o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha):
3596 - Stop ignoring torrc options after an %include directive, when the
3597 included directory ends with a file that does not contain any
3598 config options (but does contain comments or whitespace). Fixes
3599 bug 31408; bugfix on 0.3.1.1-alpha.
3601 o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha):
3602 - Onion services now always use the exact number of intro points
3603 configured with the HiddenServiceNumIntroductionPoints option (or
3604 fewer if nodes are excluded). Before, a service could sometimes
3605 pick more intro points than configured. Fixes bug 31548; bugfix
3608 o Minor features (compile-time modules, backport from version 0.4.1.1-alpha):
3609 - Add a "--list-modules" command to print a list of which compile-
3610 time modules are enabled. Closes ticket 30452.
3612 o Minor features (continuous integration, backport from 0.4.1.1-alpha):
3613 - Remove sudo configuration lines from .travis.yml as they are no
3614 longer needed with current Travis build environment. Resolves
3617 o Minor features (continuous integration, backport from 0.4.1.4-rc):
3618 - Our Travis configuration now uses Chutney to run some network
3619 integration tests automatically. Closes ticket 29280.
3621 o Minor features (continuous integration, backport from 0.4.2.2-alpha):
3622 - When building on Appveyor and Travis, pass the "-k" flag to make,
3623 so that we are informed of all compilation failures, not just the
3624 first one or two. Closes ticket 31372.
3626 o Minor features (fallback directory list, backport from 0.4.1.4-rc):
3627 - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc
3628 in December 2018 (of which ~122 were still functional), with a
3629 list of 148 fallbacks (70 new, 78 existing, 79 removed) generated
3630 in June 2019. Closes ticket 28795.
3632 o Minor features (geoip, backport from 0.4.2.5):
3633 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
3634 Country database. Closes ticket 32685.
3636 o Minor features (stem tests, backport from 0.4.2.1-alpha):
3637 - Change "make test-stem" so it only runs the stem tests that use
3638 tor. This change makes test-stem faster and more reliable. Closes
3641 o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha):
3642 - Avoid spurious errors when Appveyor CI fails before the install step.
3643 Fixes bug 31884; bugfix on 0.3.4.2-alpha.
3645 o Minor bugfixes (build system, backport form 0.4.2.1-alpha):
3646 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
3647 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
3649 o Minor bugfixes (circuit isolation, backport from 0.4.1.3-alpha):
3650 - Fix a logic error that prevented the SessionGroup sub-option from
3651 being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha.
3653 o Minor bugfixes (circuit padding, backport from 0.4.1.4-rc):
3654 - On relays, properly check that a padding machine is absent before
3655 logging a warning about it being absent. Fixes bug 30649; bugfix
3658 o Minor bugfixes (client, onion service v3, backport from 0.4.2.4-rc):
3659 - Fix a BUG() assertion that occurs within a very small race window
3660 between when a client intro circuit opens and when its descriptor
3661 gets cleaned up from the cache. The circuit is now closed early,
3662 which will trigger a re-fetch of the descriptor and continue the
3663 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
3665 o Minor bugfixes (clock skew detection, backport from 0.4.1.5):
3666 - Don't believe clock skew results from NETINFO cells that appear to
3667 arrive before we sent the VERSIONS cells they are responding to.
3668 Previously, we would accept them up to 3 minutes "in the past".
3669 Fixes bug 31343; bugfix on 0.2.4.4-alpha.
3671 o Minor bugfixes (compilation warning, backport from 0.4.1.5):
3672 - Fix a compilation warning on Windows about casting a function
3673 pointer for GetTickCount64(). Fixes bug 31374; bugfix
3676 o Minor bugfixes (compilation, backport from 0.4.1.5):
3677 - Avoid using labs() on time_t, which can cause compilation warnings
3678 on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
3680 o Minor bugfixes (compilation, backport from 0.4.2.1-alpha):
3681 - Suppress spurious float-conversion warnings from GCC when calling
3682 floating-point classifier functions on FreeBSD. Fixes part of bug
3683 31687; bugfix on 0.3.1.5-alpha.
3685 o Minor bugfixes (compilation, unusual configurations, backport from 0.4.1.1-alpha):
3686 - Avoid failures when building with the ALL_BUGS_ARE_FATAL option
3687 due to missing declarations of abort(), and prevent other such
3688 failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha.
3690 o Minor bugfixes (configuration, proxies, backport from 0.4.1.2-alpha):
3691 - Fix a bug that prevented us from supporting SOCKS5 proxies that
3692 want authentication along with configured (but unused!)
3693 ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha.
3695 o Minor bugfixes (connections, backport from 0.4.2.3-rc):
3696 - Avoid trying to read data from closed connections, which can cause
3697 needless loops in Libevent and infinite loops in Shadow. Fixes bug
3698 30344; bugfix on 0.1.1.1-alpha.
3700 o Minor bugfixes (continuous integration, backport from 0.4.1.3-alpha):
3701 - Allow the test-stem job to fail in Travis, because it sometimes
3702 hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha.
3703 - Skip test_rebind on macOS in Travis, because it is unreliable on
3704 macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
3705 - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment
3706 variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
3708 o Minor bugfixes (crash on exit, backport from 0.4.1.4-rc):
3709 - Avoid a set of possible code paths that could try to use freed
3710 memory in routerlist_free() while Tor was exiting. Fixes bug
3711 31003; bugfix on 0.1.2.2-alpha.
3713 o Minor bugfixes (directory authorities, backport from 0.4.1.3-alpha):
3714 - Stop crashing after parsing an unknown descriptor purpose
3715 annotation. We think this bug can only be triggered by modifying a
3716 local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha.
3718 o Minor bugfixes (directory authority, backport from 0.4.1.2-alpha):
3719 - Move the "bandwidth-file-headers" line in directory authority
3720 votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix
3723 o Minor bugfixes (error handling, backport from 0.4.2.1-alpha):
3724 - On abort, try harder to flush the output buffers of log messages.
3725 On some platforms (macOS), log messages could be discarded when
3726 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
3727 - Report the tor version whenever an assertion fails. Previously, we
3728 only reported the Tor version on some crashes, and some non-fatal
3729 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
3731 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6, backport from 0.4.2.1-alpha):
3732 - When extracting an IPv6 address from a PF-based proxy, verify that
3733 we are actually configured to receive an IPv6 address, and log an
3734 internal error if not. Fixes part of bug 31687; bugfix
3737 o Minor bugfixes (guards, backport from 0.4.2.1-alpha):
3738 - When tor is missing descriptors for some primary entry guards,
3739 make the log message less alarming. It's normal for descriptors to
3740 expire, as long as tor fetches new ones soon after. Fixes bug
3741 31657; bugfix on 0.3.3.1-alpha.
3743 o Minor bugfixes (logging, backport from 0.4.1.1-alpha):
3744 - Do not log a warning when running with an OpenSSL version other
3745 than the one Tor was compiled with, if the two versions should be
3746 compatible. Previously, we would warn whenever the version was
3747 different. Fixes bug 30190; bugfix on 0.2.4.2-alpha.
3749 o Minor bugfixes (logging, backport from 0.4.2.1-alpha):
3750 - Change log level of message "Hash of session info was not as
3751 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
3754 o Minor bugfixes (logging, backport from 0.4.2.2-alpha):
3755 - Rate-limit our the logging message about the obsolete .exit
3756 notation. Previously, there was no limit on this warning, which
3757 could potentially be triggered many times by a hostile website.
3758 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
3760 o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha):
3761 - Do not log a nonfatal assertion failure when receiving a VERSIONS
3762 cell on a connection using the obsolete v1 link protocol. Log a
3763 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
3765 o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha):
3766 - Reset the periodic events' "enabled" flag when Tor is shut down
3767 cleanly. Previously, this flag was left on, which caused periodic
3768 events not to be re-enabled when Tor was relaunched in-process
3769 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
3772 o Minor bugfixes (memory leak, backport from 0.4.1.1-alpha):
3773 - Avoid a minor memory leak that could occur on relays when failing
3774 to create a "keys" directory. Fixes bug 30148; bugfix
3777 o Minor bugfixes (memory leak, backport from 0.4.1.4-rc):
3778 - Fix a trivial memory leak when parsing an invalid value
3779 from a download schedule in the configuration. Fixes bug
3780 30894; bugfix on 0.3.4.1-alpha.
3782 o Minor bugfixes (NetBSD, backport from 0.4.1.2-alpha):
3783 - Fix usage of minherit() on NetBSD and other platforms that define
3784 MAP_INHERIT_{ZERO,NONE} instead of INHERIT_{ZERO,NONE}. Fixes bug
3785 30614; bugfix on 0.4.0.2-alpha. Patch from Taylor Campbell.
3787 o Minor bugfixes (onion services, backport from 0.4.1.1-alpha):
3788 - Avoid a GCC 9.1.1 warning (and possible crash depending on libc
3789 implemenation) when failing to load an onion service client
3790 authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha.
3792 o Minor bugfixes (out-of-memory handler, backport from 0.4.1.2-alpha):
3793 - When purging the DNS cache because of an out-of-memory condition,
3794 try purging just the older entries at first. Previously, we would
3795 always purge the whole thing. Fixes bug 29617; bugfix
3798 o Minor bugfixes (portability, backport from 0.4.1.2-alpha):
3799 - Avoid crashing in our tor_vasprintf() implementation on systems
3800 that define neither vasprintf() nor _vscprintf(). (This bug has
3801 been here long enough that we question whether people are running
3802 Tor on such systems, but we're applying the fix out of caution.)
3803 Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by
3806 o Minor bugfixes (process management, backport from 0.4.2.3-alpha):
3807 - Remove overly strict assertions that triggered when a pluggable
3808 transport failed to launch. Fixes bug 31091; bugfix
3810 - Remove an assertion in the Unix process backend. This assertion
3811 would trigger when we failed to find the executable for a child
3812 process. Fixes bug 31810; bugfix on 0.4.0.1-alpha.
3814 o Minor bugfixes (relay, backport from 0.4.2.2-alpha):
3815 - Avoid crashing when starting with a corrupt keys directory where
3816 the old ntor key and the new ntor key are identical. Fixes bug
3817 30916; bugfix on 0.2.4.8-alpha.
3819 o Minor bugfixes (rust, backport from 0.4.2.1-alpha):
3820 - Correctly exclude a redundant rust build job in Travis. Fixes bug
3821 31463; bugfix on 0.3.5.4-alpha.
3823 o Minor bugfixes (testing, backport from 0.4.2.3-alpha):
3824 - When testing port rebinding, don't busy-wait for tor to log.
3825 Instead, actually sleep for a short time before polling again.
3826 Also improve the formatting of control commands and log messages.
3827 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
3829 o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha):
3830 - Log bugs about the TLS read buffer's length only once, rather than
3831 filling the logs with similar warnings. Fixes bug 31939; bugfix
3834 o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha):
3835 - Always retry v2 single onion service intro and rend circuits with
3836 a 3-hop path. Previously, v2 single onion services used a 3-hop
3837 path when rendezvous circuits were retried after a remote or
3838 delayed failure, but a 1-hop path for immediate retries. Fixes bug
3839 23818; bugfix on 0.2.9.3-alpha.
3840 - Make v3 single onion services fall back to a 3-hop intro, when all
3841 intro points are unreachable via a 1-hop path. Previously, v3
3842 single onion services failed when all intro nodes were unreachable
3843 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
3845 o Documentation (backport from 0.4.2.1-alpha):
3846 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
3847 notice.html so that operators no longer have to host it
3848 themselves. Closes ticket 31089.
3850 o Testing (backport from 0.4.1.2-alpha):
3851 - Specify torrc paths (with empty files) when launching tor in
3852 integration tests; refrain from reading user and system torrcs.
3853 Resolves issue 29702.
3855 o Testing (continuous integration, backport from 0.4.1.1-alpha):
3856 - In Travis, show stem's tor log after failure. Closes ticket 30234.
3858 o Testing (continuous integration, backport from 0.4.1.5):
3859 - In Travis, make stem log a controller trace to the console, and
3860 tail stem's tor log after failure. Closes ticket 30591.
3861 - In Travis, only run the stem tests that use a tor binary. Closes
3864 o Testing (continuous integration, backport from 0.4.2.3-alpha):
3865 - Disable all but one Travis CI macOS build, to mitigate slow
3866 scheduling of Travis macOS jobs. Closes ticket 32177.
3867 - Run the chutney IPv6 networks as part of Travis CI. Closes
3869 - Simplify the Travis CI build matrix, and optimise for build time.
3870 Closes ticket 31859.
3871 - Use Windows Server 2019 instead of Windows Server 2016 in our
3872 Appveyor builds. Closes ticket 32086.
3874 o Testing (continuous integration, backport from 0.4.2.4-rc):
3875 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
3876 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
3877 until we can fix some Bionic permissions issues (see ticket
3878 32240). Related to ticket 31919.
3879 - Install the mingw OpenSSL package in Appveyor. This makes sure
3880 that the OpenSSL headers and libraries match in Tor's Appveyor
3881 builds. (This bug was triggered by an Appveyor image update.)
3882 Fixes bug 32449; bugfix on 0.3.5.6-rc.
3883 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
3885 o Testing (continuous integration, backport from 0.4.2.5):
3886 - Require C99 standards-conforming code in Travis CI, but allow GNU gcc
3887 extensions. Also activates clang's -Wtypedef-redefinition warnings.
3888 Build some jobs with -std=gnu99, and some jobs without.
3889 Closes ticket 32500.
3891 Changes in version 0.3.5.9 - 2019-12-09
3892 Tor 0.3.5.9 backports serveral fixes from later releases, including
3893 several that affect bridge users, relay stability, onion services,
3896 o Directory authority changes (backport from 0.4.1.5):
3897 - The directory authority "dizum" has a new IP address. Closes
3900 o Major bugfixes (bridges, backport from 0.4.1.2-alpha):
3901 - Consider our directory information to have changed when our list
3902 of bridges changes. Previously, Tor would not re-compute the
3903 status of its directory information when bridges changed, and
3904 therefore would not realize that it was no longer able to build
3905 circuits. Fixes part of bug 29875.
3906 - Do not count previously configured working bridges towards our
3907 total of working bridges. Previously, when Tor's list of bridges
3908 changed, it would think that the old bridges were still usable,
3909 and delay fetching router descriptors for the new ones. Fixes part
3910 of bug 29875; bugfix on 0.3.0.1-alpha.
3912 o Major bugfixes (circuit build, guard, backport from 0.4.1.4-rc):
3913 - When considering upgrading circuits from "waiting for guard" to
3914 "open", always ignore circuits that are marked for close. Otherwise,
3915 we can end up in the situation where a subsystem is notified that
3916 a closing circuit has just opened, leading to undesirable
3917 behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha.
3919 o Major bugfixes (NSS, relay, backport from 0.4.0.4-rc):
3920 - When running with NSS, disable TLS 1.2 ciphersuites that use
3921 SHA384 for their PRF. Due to an NSS bug, the TLS key exporters for
3922 these ciphersuites don't work -- which caused relays to fail to
3923 handshake with one another when these ciphersuites were enabled.
3924 Fixes bug 29241; bugfix on 0.3.5.1-alpha.
3926 o Major bugfixes (Onion service reachability, backport from 0.4.1.3-alpha):
3927 - Properly clean up the introduction point map when circuits change
3928 purpose from onion service circuits to pathbias, measurement, or
3929 other circuit types. This should fix some service-side instances
3930 of introduction point failure. Fixes bug 29034; bugfix
3933 o Major bugfixes (onion service v3, backport from 0.4.1.1-alpha):
3934 - Fix an unreachable bug in which an introduction point could try to
3935 send an INTRODUCE_ACK with a status code that Trunnel would refuse
3936 to encode, leading the relay to assert(). We've consolidated the
3937 ABI values into Trunnel now. Fixes bug 30454; bugfix
3939 - Clients can now handle unknown status codes from INTRODUCE_ACK
3940 cells. (The NACK behavior will stay the same.) This will allow us
3941 to extend status codes in the future without breaking the normal
3942 client behavior. Fixes another part of bug 30454; bugfix
3945 o Major bugfixes (torrc parsing, backport from 0.4.2.2-alpha):
3946 - Stop ignoring torrc options after an %include directive, when the
3947 included directory ends with a file that does not contain any
3948 config options (but does contain comments or whitespace). Fixes
3949 bug 31408; bugfix on 0.3.1.1-alpha.
3951 o Major bugfixes (v3 onion services, backport from 0.4.2.3-alpha):
3952 - Onion services now always use the exact number of intro points
3953 configured with the HiddenServiceNumIntroductionPoints option (or
3954 fewer if nodes are excluded). Before, a service could sometimes
3955 pick more intro points than configured. Fixes bug 31548; bugfix
3958 o Minor features (address selection, backport from 0.4.0.3-alpha):
3959 - Treat the subnet 100.64.0.0/10 as public for some purposes;
3960 private for others. This subnet is the RFC 6598 (Carrier Grade
3961 NAT) IP range, and is deployed by many ISPs as an alternative to
3962 RFC 1918 that does not break existing internal networks. Tor now
3963 blocks SOCKS and control ports on these addresses and warns users
3964 if client ports or ExtORPorts are listening on a RFC 6598 address.
3965 Closes ticket 28525. Patch by Neel Chauhan.
3967 o Minor features (bandwidth authority, backport from 0.4.0.4-rc):
3968 - Make bandwidth authorities ignore relays that are reported in the
3969 bandwidth file with the flag "vote=0". This change allows us to
3970 report unmeasured relays for diagnostic reasons without including
3971 their bandwidth in the bandwidth authorities' vote. Closes
3974 o Minor features (compile-time modules, backport from version 0.4.1.1-alpha):
3975 - Add a "--list-modules" command to print a list of which compile-
3976 time modules are enabled. Closes ticket 30452.
3978 o Minor features (continuous integration, backport from 0.4.0.4-rc):
3979 - On Travis Rust builds, cleanup Rust registry and refrain from
3980 caching the "target/" directory to speed up builds. Resolves
3983 o Minor features (continuous integration, backport from 0.4.0.5):
3984 - In Travis, tell timelimit to use stem's backtrace signals, and
3985 launch python directly from timelimit, so python receives the
3986 signals from timelimit, rather than make. Closes ticket 30117.
3988 o Minor features (continuous integration, backport from 0.4.1.1-alpha):
3989 - Remove sudo configuration lines from .travis.yml as they are no
3990 longer needed with current Travis build environment. Resolves
3993 o Minor features (continuous integration, backport from 0.4.1.4-rc):
3994 - Our Travis configuration now uses Chutney to run some network
3995 integration tests automatically. Closes ticket 29280.
3997 o Minor features (continuous integration, backport from 0.4.2.2-alpha):
3998 - When building on Appveyor and Travis, pass the "-k" flag to make,
3999 so that we are informed of all compilation failures, not just the
4000 first one or two. Closes ticket 31372.
4002 o Minor features (fallback directory list, backport from 0.4.1.4-rc):
4003 - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc
4004 in December 2018 (of which ~122 were still functional), with a
4005 list of 148 fallbacks (70 new, 78 existing, 79 removed) generated
4006 in June 2019. Closes ticket 28795.
4008 o Minor features (geoip, backport from 0.4.2.5):
4009 - Update geoip and geoip6 to the December 3 2019 Maxmind GeoLite2
4010 Country database. Closes ticket 32685.
4012 o Minor features (NSS, diagnostic, backport from 0.4.0.4-rc):
4013 - Try to log an error from NSS (if there is any) and a more useful
4014 description of our situation if we are using NSS and a call to
4015 SSL_ExportKeyingMaterial() fails. Diagnostic for ticket 29241.
4017 o Minor features (stem tests, backport from 0.4.2.1-alpha):
4018 - Change "make test-stem" so it only runs the stem tests that use
4019 tor. This change makes test-stem faster and more reliable. Closes
4022 o Minor bugfixes (security, backport from 0.4.0.4-rc):
4023 - Verify in more places that we are not about to create a buffer
4024 with more than INT_MAX bytes, to avoid possible OOB access in the
4025 event of bugs. Fixes bug 30041; bugfix on 0.2.0.16. Found and
4026 fixed by Tobias Stoeckmann.
4027 - Fix a potential double free bug when reading huge bandwidth files.
4028 The issue is not exploitable in the current Tor network because
4029 the vulnerable code is only reached when directory authorities
4030 read bandwidth files, but bandwidth files come from a trusted
4031 source (usually the authorities themselves). Furthermore, the
4032 issue is only exploitable in rare (non-POSIX) 32-bit architectures,
4033 which are not used by any of the current authorities. Fixes bug
4034 30040; bugfix on 0.3.5.1-alpha. Bug found and fixed by
4037 o Minor bugfix (continuous integration, backport from 0.4.0.4-rc):
4038 - Reset coverage state on disk after Travis CI has finished. This
4039 should prevent future coverage merge errors from causing the test
4040 suite for the "process" subsystem to fail. The process subsystem
4041 was introduced in 0.4.0.1-alpha. Fixes bug 29036; bugfix
4043 - Terminate test-stem if it takes more than 9.5 minutes to run.
4044 (Travis terminates the job after 10 minutes of no output.)
4045 Diagnostic for 29437. Fixes bug 30011; bugfix on 0.3.5.4-alpha.
4047 o Minor bugfixes (Appveyor CI, backport from 0.4.2.2-alpha):
4048 - Avoid spurious errors when Appveyor CI fails before the install step.
4049 Fixes bug 31884; bugfix on 0.3.4.2-alpha.
4051 o Minor bugfixes (build system, backport form 0.4.2.1-alpha):
4052 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
4053 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
4055 o Minor bugfixes (C correctness, backport from 0.4.0.4-rc):
4056 - Fix an unlikely memory leak in consensus_diff_apply(). Fixes bug
4057 29824; bugfix on 0.3.1.1-alpha. This is Coverity warning
4060 o Minor bugfixes (circuit isolation, backport from 0.4.1.3-alpha):
4061 - Fix a logic error that prevented the SessionGroup sub-option from
4062 being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha.
4064 o Minor bugfixes (client, onion service v3, backport from 0.4.2.4-rc):
4065 - Fix a BUG() assertion that occurs within a very small race window
4066 between when a client intro circuit opens and when its descriptor
4067 gets cleaned up from the cache. The circuit is now closed early,
4068 which will trigger a re-fetch of the descriptor and continue the
4069 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
4071 o Minor bugfixes (clock skew detection, backport from 0.4.1.5):
4072 - Don't believe clock skew results from NETINFO cells that appear to
4073 arrive before we sent the VERSIONS cells they are responding to.
4074 Previously, we would accept them up to 3 minutes "in the past".
4075 Fixes bug 31343; bugfix on 0.2.4.4-alpha.
4077 o Minor bugfixes (compilation warning, backport from 0.4.1.5):
4078 - Fix a compilation warning on Windows about casting a function
4079 pointer for GetTickCount64(). Fixes bug 31374; bugfix
4082 o Minor bugfixes (compilation, backport from 0.4.0.2-alpha):
4083 - Silence a compiler warning in test-memwipe.c on OpenBSD. Fixes bug
4084 29145; bugfix on 0.2.9.3-alpha. Patch from Kris Katterjohn.
4086 o Minor bugfixes (compilation, backport from 0.4.1.5):
4087 - Avoid using labs() on time_t, which can cause compilation warnings
4088 on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
4090 o Minor bugfixes (compilation, backport from 0.4.2.1-alpha):
4091 - Suppress spurious float-conversion warnings from GCC when calling
4092 floating-point classifier functions on FreeBSD. Fixes part of bug
4093 31687; bugfix on 0.3.1.5-alpha.
4095 o Minor bugfixes (compilation, unusual configurations, backport from 0.4.1.1-alpha):
4096 - Avoid failures when building with the ALL_BUGS_ARE_FATAL option
4097 due to missing declarations of abort(), and prevent other such
4098 failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha.
4100 o Minor bugfixes (configuration, proxies, backport from 0.4.1.2-alpha):
4101 - Fix a bug that prevented us from supporting SOCKS5 proxies that
4102 want authentication along with configured (but unused!)
4103 ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha.
4105 o Minor bugfixes (connections, backport from 0.4.2.3-rc):
4106 - Avoid trying to read data from closed connections, which can cause
4107 needless loops in Libevent and infinite loops in Shadow. Fixes bug
4108 30344; bugfix on 0.1.1.1-alpha.
4110 o Minor bugfixes (continuous integration, backport from 0.4.1.3-alpha):
4111 - Allow the test-stem job to fail in Travis, because it sometimes
4112 hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha.
4113 - Skip test_rebind on macOS in Travis, because it is unreliable on
4114 macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
4115 - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment
4116 variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
4118 o Minor bugfixes (crash on exit, backport from 0.4.1.4-rc):
4119 - Avoid a set of possible code paths that could try to use freed
4120 memory in routerlist_free() while Tor was exiting. Fixes bug
4121 31003; bugfix on 0.1.2.2-alpha.
4123 o Minor bugfixes (directory authorities, backport from 0.4.1.3-alpha):
4124 - Stop crashing after parsing an unknown descriptor purpose
4125 annotation. We think this bug can only be triggered by modifying a
4126 local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha.
4128 o Minor bugfixes (directory authority, backport from 0.4.1.2-alpha):
4129 - Move the "bandwidth-file-headers" line in directory authority
4130 votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix
4133 o Minor bugfixes (error handling, backport from 0.4.2.1-alpha):
4134 - On abort, try harder to flush the output buffers of log messages.
4135 On some platforms (macOS), log messages could be discarded when
4136 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
4137 - Report the tor version whenever an assertion fails. Previously, we
4138 only reported the Tor version on some crashes, and some non-fatal
4139 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
4141 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6, backport from 0.4.2.1-alpha):
4142 - When extracting an IPv6 address from a PF-based proxy, verify that
4143 we are actually configured to receive an IPv6 address, and log an
4144 internal error if not. Fixes part of bug 31687; bugfix
4147 o Minor bugfixes (guards, backport from 0.4.2.1-alpha):
4148 - When tor is missing descriptors for some primary entry guards,
4149 make the log message less alarming. It's normal for descriptors to
4150 expire, as long as tor fetches new ones soon after. Fixes bug
4151 31657; bugfix on 0.3.3.1-alpha.
4153 o Minor bugfixes (logging, backport from 0.4.0.2-alpha):
4154 - Avoid logging that we are relaxing a circuit timeout when that
4155 timeout is fixed. Fixes bug 28698; bugfix on 0.2.4.7-alpha.
4157 o Minor bugfixes (logging, backport from 0.4.0.3-alpha):
4158 - Correct a misleading error message when IPv4Only or IPv6Only is
4159 used but the resolved address can not be interpreted as an address
4160 of the specified IP version. Fixes bug 13221; bugfix on
4161 0.2.3.9-alpha. Patch from Kris Katterjohn.
4162 - Log the correct port number for listening sockets when "auto" is
4163 used to let Tor pick the port number. Previously, port 0 was
4164 logged instead of the actual port number. Fixes bug 29144; bugfix
4165 on 0.3.5.1-alpha. Patch from Kris Katterjohn.
4166 - Stop logging a BUG() warning when Tor is waiting for exit
4167 descriptors. Fixes bug 28656; bugfix on 0.3.5.1-alpha.
4169 o Minor bugfixes (logging, backport from 0.4.1.1-alpha):
4170 - Do not log a warning when running with an OpenSSL version other
4171 than the one Tor was compiled with, if the two versions should be
4172 compatible. Previously, we would warn whenever the version was
4173 different. Fixes bug 30190; bugfix on 0.2.4.2-alpha.
4175 o Minor bugfixes (logging, backport from 0.4.2.1-alpha):
4176 - Change log level of message "Hash of session info was not as
4177 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
4180 o Minor bugfixes (logging, backport from 0.4.2.2-alpha):
4181 - Rate-limit our the logging message about the obsolete .exit
4182 notation. Previously, there was no limit on this warning, which
4183 could potentially be triggered many times by a hostile website.
4184 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
4186 o Minor bugfixes (logging, protocol violations, backport from 0.4.2.2-alpha):
4187 - Do not log a nonfatal assertion failure when receiving a VERSIONS
4188 cell on a connection using the obsolete v1 link protocol. Log a
4189 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
4191 o Minor bugfixes (mainloop, periodic events, in-process API, backport from 0.4.2.3-alpha):
4192 - Reset the periodic events' "enabled" flag when Tor is shut down
4193 cleanly. Previously, this flag was left on, which caused periodic
4194 events not to be re-enabled when Tor was relaunched in-process
4195 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
4198 o Minor bugfixes (memory leak, backport from 0.4.1.1-alpha):
4199 - Avoid a minor memory leak that could occur on relays when failing
4200 to create a "keys" directory. Fixes bug 30148; bugfix
4203 o Minor bugfixes (memory leak, backport from 0.4.1.4-rc):
4204 - Fix a trivial memory leak when parsing an invalid value
4205 from a download schedule in the configuration. Fixes bug
4206 30894; bugfix on 0.3.4.1-alpha.
4208 o Minor bugfixes (memory management, backport from 0.4.0.3-alpha):
4209 - Refactor the shared random state's memory management so that it
4210 actually takes ownership of the shared random value pointers.
4211 Fixes bug 29706; bugfix on 0.2.9.1-alpha.
4213 o Minor bugfixes (memory management, testing, backport from 0.4.0.3-alpha):
4214 - Stop leaking parts of the shared random state in the shared-random
4215 unit tests. Fixes bug 29599; bugfix on 0.2.9.1-alpha.
4217 o Minor bugfixes (onion services, backport from 0.4.1.1-alpha):
4218 - Avoid a GCC 9.1.1 warning (and possible crash depending on libc
4219 implemenation) when failing to load an onion service client
4220 authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha.
4222 o Minor bugfixes (out-of-memory handler, backport from 0.4.1.2-alpha):
4223 - When purging the DNS cache because of an out-of-memory condition,
4224 try purging just the older entries at first. Previously, we would
4225 always purge the whole thing. Fixes bug 29617; bugfix
4228 o Minor bugfixes (portability, backport from 0.4.1.2-alpha):
4229 - Avoid crashing in our tor_vasprintf() implementation on systems
4230 that define neither vasprintf() nor _vscprintf(). (This bug has
4231 been here long enough that we question whether people are running
4232 Tor on such systems, but we're applying the fix out of caution.)
4233 Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by
4236 o Minor bugfixes (relay, backport from 0.4.2.2-alpha):
4237 - Avoid crashing when starting with a corrupt keys directory where
4238 the old ntor key and the new ntor key are identical. Fixes bug
4239 30916; bugfix on 0.2.4.8-alpha.
4241 o Minor bugfixes (rust, backport from 0.4.0.5):
4242 - Abort on panic in all build profiles, instead of potentially
4243 unwinding into C code. Fixes bug 27199; bugfix on 0.3.3.1-alpha.
4245 o Minor bugfixes (rust, backport from 0.4.2.1-alpha):
4246 - Correctly exclude a redundant rust build job in Travis. Fixes bug
4247 31463; bugfix on 0.3.5.4-alpha.
4249 o Minor bugfixes (single onion services, backport from 0.4.0.3-alpha):
4250 - Allow connections to single onion services to remain idle without
4251 being disconnected. Previously, relays acting as rendezvous points
4252 for single onion services were mistakenly closing idle rendezvous
4253 circuits after 60 seconds, thinking that they were unused
4254 directory-fetching circuits that had served their purpose. Fixes
4255 bug 29665; bugfix on 0.2.1.26.
4257 o Minor bugfixes (stats, backport from 0.4.0.3-alpha):
4258 - When ExtraInfoStatistics is 0, stop including PaddingStatistics in
4259 relay and bridge extra-info documents. Fixes bug 29017; bugfix
4262 o Minor bugfixes (testing, backport from 0.4.0.3-alpha):
4263 - Downgrade some LOG_ERR messages in the address/* tests to
4264 warnings. The LOG_ERR messages were occurring when we had no
4265 configured network. We were failing the unit tests, because we
4266 backported 28668 to 0.3.5.8, but did not backport 29530. Fixes bug
4267 29530; bugfix on 0.3.5.8.
4268 - Fix our gcov wrapper script to look for object files at the
4269 correct locations. Fixes bug 29435; bugfix on 0.3.5.1-alpha.
4271 o Minor bugfixes (testing, backport from 0.4.0.4-rc):
4272 - Backport the 0.3.4 src/test/test-network.sh to 0.2.9. We need a
4273 recent test-network.sh to use new chutney features in CI. Fixes
4274 bug 29703; bugfix on 0.2.9.1-alpha.
4275 - Fix a test failure on Windows caused by an unexpected "BUG"
4276 warning in our tests for tor_gmtime_r(-1). Fixes bug 29922; bugfix
4279 o Minor bugfixes (testing, backport from 0.4.2.3-alpha):
4280 - When testing port rebinding, don't busy-wait for tor to log.
4281 Instead, actually sleep for a short time before polling again.
4282 Also improve the formatting of control commands and log messages.
4283 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
4285 o Minor bugfixes (TLS protocol, backport form 0.4.0.4-rc):
4286 - When classifying a client's selection of TLS ciphers, if the
4287 client ciphers are not yet available, do not cache the result.
4288 Previously, we had cached the unavailability of the cipher list
4289 and never looked again, which in turn led us to assume that the
4290 client only supported the ancient V1 link protocol. This, in turn,
4291 was causing Stem integration tests to stall in some cases. Fixes
4292 bug 30021; bugfix on 0.2.4.8-alpha.
4294 o Minor bugfixes (tls, logging, backport from 0.4.2.3-alpha):
4295 - Log bugs about the TLS read buffer's length only once, rather than
4296 filling the logs with similar warnings. Fixes bug 31939; bugfix
4299 o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha):
4300 - Always retry v2 single onion service intro and rend circuits with
4301 a 3-hop path. Previously, v2 single onion services used a 3-hop
4302 path when rendezvous circuits were retried after a remote or
4303 delayed failure, but a 1-hop path for immediate retries. Fixes bug
4304 23818; bugfix on 0.2.9.3-alpha.
4305 - Make v3 single onion services fall back to a 3-hop intro, when all
4306 intro points are unreachable via a 1-hop path. Previously, v3
4307 single onion services failed when all intro nodes were unreachable
4308 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
4310 o Minor bugfixes (Windows, CI, backport from 0.4.0.3-alpha):
4311 - Skip the Appveyor 32-bit Windows Server 2016 job, and 64-bit
4312 Windows Server 2012 R2 job. The remaining 2 jobs still provide
4313 coverage of 64/32-bit, and Windows Server 2016/2012 R2. Also set
4314 fast_finish, so failed jobs terminate the build immediately. Fixes
4315 bug 29601; bugfix on 0.3.5.4-alpha.
4317 o Documentation (backport from 0.4.2.1-alpha):
4318 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
4319 notice.html so that operators no longer have to host it
4320 themselves. Closes ticket 31089.
4322 o Testing (backport from 0.4.1.2-alpha):
4323 - Specify torrc paths (with empty files) when launching tor in
4324 integration tests; refrain from reading user and system torrcs.
4325 Resolves issue 29702.
4327 o Testing (continuous integration, backport from 0.4.1.1-alpha):
4328 - In Travis, show stem's tor log after failure. Closes ticket 30234.
4330 o Testing (continuous integration, backport from 0.4.1.5):
4331 - In Travis, make stem log a controller trace to the console, and
4332 tail stem's tor log after failure. Closes ticket 30591.
4333 - In Travis, only run the stem tests that use a tor binary. Closes
4336 o Testing (continuous integration, backport from 0.4.2.3-alpha):
4337 - Disable all but one Travis CI macOS build, to mitigate slow
4338 scheduling of Travis macOS jobs. Closes ticket 32177.
4339 - Run the chutney IPv6 networks as part of Travis CI. Closes
4341 - Simplify the Travis CI build matrix, and optimise for build time.
4342 Closes ticket 31859.
4343 - Use Windows Server 2019 instead of Windows Server 2016 in our
4344 Appveyor builds. Closes ticket 32086.
4346 o Testing (continuous integration, backport from 0.4.2.4-rc):
4347 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
4348 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
4349 until we can fix some Bionic permissions issues (see ticket
4350 32240). Related to ticket 31919.
4351 - Install the mingw OpenSSL package in Appveyor. This makes sure
4352 that the OpenSSL headers and libraries match in Tor's Appveyor
4353 builds. (This bug was triggered by an Appveyor image update.)
4354 Fixes bug 32449; bugfix on 0.3.5.6-rc.
4355 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
4357 o Testing (continuous integration, backport from 0.4.2.5):
4358 - Require C99 standards-conforming code in Travis CI, but allow GNU gcc
4359 extensions. Also activates clang's -Wtypedef-redefinition warnings.
4360 Build some jobs with -std=gnu99, and some jobs without.
4361 Closes ticket 32500.
4363 Changes in version 0.4.2.4-rc - 2019-11-15
4364 Tor 0.4.2.4-rc is the first release candidate in its series. It fixes
4365 several bugs from earlier versions, including a few that would result in
4366 stack traces or incorrect behavior.
4368 o Minor features (build system):
4369 - Make pkg-config use --prefix when cross-compiling, if
4370 PKG_CONFIG_PATH is not set. Closes ticket 32191.
4372 o Minor features (geoip):
4373 - Update geoip and geoip6 to the November 6 2019 Maxmind GeoLite2
4374 Country database. Closes ticket 32440.
4376 o Minor bugfixes (client, onion service v3):
4377 - Fix a BUG() assertion that occurs within a very small race window
4378 between when a client intro circuit opens and when its descriptor
4379 gets cleaned up from the cache. The circuit is now closed early,
4380 which will trigger a re-fetch of the descriptor and continue the
4381 connection. Fixes bug 28970; bugfix on 0.3.2.1-alpha.
4383 o Minor bugfixes (code quality):
4384 - Fix "make check-includes" so it runs correctly on out-of-tree
4385 builds. Fixes bug 31335; bugfix on 0.3.5.1-alpha.
4387 o Minor bugfixes (configuration):
4388 - Log the option name when skipping an obsolete option. Fixes bug
4389 32295; bugfix on 0.4.2.1-alpha.
4391 o Minor bugfixes (crash):
4392 - When running Tor with an option like --verify-config or
4393 --dump-config that does not start the event loop, avoid crashing
4394 if we try to exit early because of an error. Fixes bug 32407;
4395 bugfix on 0.3.3.1-alpha.
4397 o Minor bugfixes (directory):
4398 - When checking if a directory connection is anonymous, test if the
4399 circuit was marked for close before looking at its channel. This
4400 avoids a BUG() stacktrace if the circuit was previously closed.
4401 Fixes bug 31958; bugfix on 0.4.2.1-alpha.
4403 o Minor bugfixes (shellcheck):
4404 - Fix minor shellcheck errors in the git-*.sh scripts. Fixes bug
4405 32402; bugfix on 0.4.2.1-alpha.
4406 - Start checking most scripts for shellcheck errors again. Fixes bug
4407 32402; bugfix on 0.4.2.1-alpha.
4409 o Testing (continuous integration):
4410 - Use Ubuntu Bionic images for our Travis CI builds, so we can get a
4411 recent version of coccinelle. But leave chutney on Ubuntu Trusty,
4412 until we can fix some Bionic permissions issues (see ticket
4413 32240). Related to ticket 31919.
4414 - Install the mingw OpenSSL package in Appveyor. This makes sure
4415 that the OpenSSL headers and libraries match in Tor's Appveyor
4416 builds. (This bug was triggered by an Appveyor image update.)
4417 Fixes bug 32449; bugfix on 0.3.5.6-rc.
4418 - In Travis, use Xcode 11.2 on macOS 10.14. Closes ticket 32241.
4421 Changes in version 0.4.2.3-alpha - 2019-10-24
4422 This release fixes several bugs from the previous alpha release, and
4423 from earlier versions of Tor.
4425 o Major bugfixes (relay):
4426 - Relays now respect their AccountingMax bandwidth again. When
4427 relays entered "soft" hibernation (which typically starts when
4428 we've hit 90% of our AccountingMax), we had stopped checking
4429 whether we should enter hard hibernation. Soft hibernation refuses
4430 new connections and new circuits, but the existing circuits can
4431 continue, meaning that relays could have exceeded their configured
4432 AccountingMax. Fixes bug 32108; bugfix on 0.4.0.1-alpha.
4434 o Major bugfixes (v3 onion services):
4435 - Onion services now always use the exact number of intro points
4436 configured with the HiddenServiceNumIntroductionPoints option (or
4437 fewer if nodes are excluded). Before, a service could sometimes
4438 pick more intro points than configured. Fixes bug 31548; bugfix
4441 o Minor feature (onion services, control port):
4442 - The ADD_ONION command's keyword "BEST" now defaults to ED25519-V3
4443 (v3) onion services. Previously it defaulted to RSA1024 (v2).
4444 Closes ticket 29669.
4446 o Minor features (testing):
4447 - When running tests that attempt to look up hostnames, replace the
4448 libc name lookup functions with ones that do not actually touch
4449 the network. This way, the tests complete more quickly in the
4450 presence of a slow or missing DNS resolver. Closes ticket 31841.
4452 o Minor features (testing, continuous integration):
4453 - Disable all but one Travis CI macOS build, to mitigate slow
4454 scheduling of Travis macOS jobs. Closes ticket 32177.
4455 - Run the chutney IPv6 networks as part of Travis CI. Closes
4457 - Simplify the Travis CI build matrix, and optimise for build time.
4458 Closes ticket 31859.
4459 - Use Windows Server 2019 instead of Windows Server 2016 in our
4460 Appveyor builds. Closes ticket 32086.
4462 o Minor bugfixes (build system):
4463 - Interpret "--disable-module-dirauth=no" correctly. Fixes bug
4464 32124; bugfix on 0.3.4.1-alpha.
4465 - Interpret "--with-tcmalloc=no" correctly. Fixes bug 32124; bugfix
4467 - Stop failing when jemalloc is requested, but tcmalloc is not
4468 found. Fixes bug 32124; bugfix on 0.3.5.1-alpha.
4469 - When pkg-config is not installed, or a library that depends on
4470 pkg-config is not found, tell the user what to do to fix the
4471 problem. Fixes bug 31922; bugfix on 0.3.1.1-alpha.
4473 o Minor bugfixes (connections):
4474 - Avoid trying to read data from closed connections, which can cause
4475 needless loops in Libevent and infinite loops in Shadow. Fixes bug
4476 30344; bugfix on 0.1.1.1-alpha.
4478 o Minor bugfixes (error handling):
4479 - Always lock the backtrace buffer before it is used. Fixes bug
4480 31734; bugfix on 0.2.5.3-alpha.
4482 o Minor bugfixes (mainloop, periodic events, in-process API):
4483 - Reset the periodic events' "enabled" flag when Tor is shut down
4484 cleanly. Previously, this flag was left on, which caused periodic
4485 events not to be re-enabled when Tor was relaunched in-process
4486 with tor_api.h after a shutdown. Fixes bug 32058; bugfix
4489 o Minor bugfixes (process management):
4490 - Remove overly strict assertions that triggered when a pluggable
4491 transport failed to launch. Fixes bug 31091; bugfix
4493 - Remove an assertion in the Unix process backend. This assertion
4494 would trigger when we failed to find the executable for a child
4495 process. Fixes bug 31810; bugfix on 0.4.0.1-alpha.
4497 o Minor bugfixes (testing):
4498 - Avoid intermittent test failures due to a test that had relied on
4499 inconsistent timing sources. Fixes bug 31995; bugfix
4501 - When testing port rebinding, don't busy-wait for tor to log.
4502 Instead, actually sleep for a short time before polling again.
4503 Also improve the formatting of control commands and log messages.
4504 Fixes bug 31837; bugfix on 0.3.5.1-alpha.
4506 o Minor bugfixes (tls, logging):
4507 - Log bugs about the TLS read buffer's length only once, rather than
4508 filling the logs with similar warnings. Fixes bug 31939; bugfix
4511 o Minor bugfixes (v3 onion services):
4512 - Fix an implicit conversion from ssize_t to size_t discovered by
4513 Coverity. Fixes bug 31682; bugfix on 0.4.2.1-alpha.
4514 - Fix a memory leak in an unlikely error code path when encoding HS
4515 DoS establish intro extension cell. Fixes bug 32063; bugfix
4517 - When cleaning up intro circuits for a v3 onion service, don't
4518 remove circuits that have an established or pending circuit, even
4519 if they ran out of retries. This way, we don't remove a circuit on
4520 its last retry. Fixes bug 31652; bugfix on 0.3.2.1-alpha.
4523 - Correct the description of "GuardLifetime". Fixes bug 31189;
4524 bugfix on 0.3.0.1-alpha.
4525 - Make clear in the man page, in both the bandwidth section and the
4526 AccountingMax section, that Tor counts in powers of two, not
4527 powers of ten: 1 GByte is 1024*1024*1024 bytes, not one billion
4528 bytes. Resolves ticket 32106.
4531 Changes in version 0.4.2.2-alpha - 2019-10-07
4532 This release fixes several bugs from the previous alpha release, and
4533 from earlier versions. It also includes a change in authorities, so
4534 that they begin to reject the currently unsupported release series.
4536 o Major features (directory authorities):
4537 - Directory authorities now reject relays running all currently
4538 deprecated release series. The currently supported release series
4539 are: 0.2.9, 0.3.5, 0.4.0, 0.4.1, and 0.4.2. Closes ticket 31549.
4541 o Major bugfixes (embedded Tor):
4542 - Avoid a possible crash when restarting Tor in embedded mode and
4543 enabling a different set of publish/subscribe messages. Fixes bug
4544 31898; bugfix on 0.4.1.1-alpha.
4546 o Major bugfixes (torrc parsing):
4547 - Stop ignoring torrc options after an %include directive, when the
4548 included directory ends with a file that does not contain any
4549 config options (but does contain comments or whitespace). Fixes
4550 bug 31408; bugfix on 0.3.1.1-alpha.
4552 o Minor features (auto-formatting scripts):
4553 - When annotating C macros, never generate a line that our check-
4554 spaces script would reject. Closes ticket 31759.
4555 - When annotating C macros, try to remove cases of double-negation.
4556 Closes ticket 31779.
4558 o Minor features (continuous integration):
4559 - When building on Appveyor and Travis, pass the "-k" flag to make,
4560 so that we are informed of all compilation failures, not just the
4561 first one or two. Closes ticket 31372.
4563 o Minor features (geoip):
4564 - Update geoip and geoip6 to the October 1 2019 Maxmind GeoLite2
4565 Country database. Closes ticket 31931.
4567 o Minor features (maintenance scripts):
4568 - Add a Coccinelle script to detect bugs caused by incrementing or
4569 decrementing a variable inside a call to log_debug(). Since
4570 log_debug() is a macro whose arguments are conditionally
4571 evaluated, it is usually an error to do this. One such bug was
4572 30628, in which SENDME cells were miscounted by a decrement
4573 operator inside a log_debug() call. Closes ticket 30743.
4575 o Minor features (onion services v3):
4576 - Assist users who try to setup v2 client authorization in v3 onion
4577 services by pointing them to the right documentation. Closes
4580 o Minor bugfixes (Appveyor continuous integration):
4581 - Avoid spurious errors when Appveyor CI fails before the install
4582 step. Fixes bug 31884; bugfix on 0.3.4.2-alpha.
4584 o Minor bugfixes (best practices tracker):
4585 - When listing overbroad exceptions, do not also list problems, and
4586 do not list insufficiently broad exceptions. Fixes bug 31338;
4587 bugfix on 0.4.2.1-alpha.
4589 o Minor bugfixes (controller protocol):
4590 - Fix the MAPADDRESS controller command to accept one or more
4591 arguments. Previously, it required two or more arguments, and
4592 ignored the first. Fixes bug 31772; bugfix on 0.4.1.1-alpha.
4594 o Minor bugfixes (logging):
4595 - Add a missing check for HAVE_PTHREAD_H, because the backtrace code
4596 uses mutexes. Fixes bug 31614; bugfix on 0.2.5.2-alpha.
4597 - Disable backtrace signal handlers when shutting down tor. Fixes
4598 bug 31614; bugfix on 0.2.5.2-alpha.
4599 - Rate-limit our the logging message about the obsolete .exit
4600 notation. Previously, there was no limit on this warning, which
4601 could potentially be triggered many times by a hostile website.
4602 Fixes bug 31466; bugfix on 0.2.2.1-alpha.
4603 - When initialising log domain masks, only set known log domains.
4604 Fixes bug 31854; bugfix on 0.2.1.1-alpha.
4606 o Minor bugfixes (logging, protocol violations):
4607 - Do not log a nonfatal assertion failure when receiving a VERSIONS
4608 cell on a connection using the obsolete v1 link protocol. Log a
4609 protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.
4611 o Minor bugfixes (modules):
4612 - Explain what the optional Directory Authority module is, and what
4613 happens when it is disabled. Fixes bug 31825; bugfix
4616 o Minor bugfixes (multithreading):
4617 - Avoid some undefined behaviour when freeing mutexes. Fixes bug
4618 31736; bugfix on 0.0.7.
4620 o Minor bugfixes (relay):
4621 - Avoid crashing when starting with a corrupt keys directory where
4622 the old ntor key and the new ntor key are identical. Fixes bug
4623 30916; bugfix on 0.2.4.8-alpha.
4625 o Minor bugfixes (tests, SunOS):
4626 - Avoid a map_anon_nofork test failure due to a signed/unsigned
4627 integer comparison. Fixes bug 31897; bugfix on 0.4.1.1-alpha.
4629 o Code simplification and refactoring:
4630 - Refactor connection_control_process_inbuf() to reduce the size of
4631 a practracker exception. Closes ticket 31840.
4632 - Refactor the microdescs_parse_from_string() function into smaller
4633 pieces, for better comprehensibility. Closes ticket 31675.
4634 - Use SEVERITY_MASK_IDX() to find the LOG_* mask indexes in the unit
4635 tests and fuzzers, rather than using hard-coded values. Closes
4637 - Interface for function `decrypt_desc_layer` cleaned up. Closes
4641 - Document the signal-safe logging behaviour in the tor man page.
4642 Also add some comments to the relevant functions. Closes
4644 - Explain why we can't destroy the backtrace buffer mutex. Explain
4645 why we don't need to destroy the log mutex. Closes ticket 31736.
4646 - The Tor source code repository now includes a (somewhat dated)
4647 description of Tor's modular architecture, in doc/HACKING/design.
4648 This is based on the old "tor-guts.git" repository, which we are
4649 adopting and superseding. Closes ticket 31849.
4652 Changes in version 0.4.1.6 - 2019-09-19
4653 This release backports several bugfixes to improve stability and
4654 correctness. Anyone experiencing build problems or crashes with 0.4.1.5,
4655 or experiencing reliability issues with single onion services, should
4658 o Major bugfixes (crash, Linux, Android, backport from 0.4.2.1-alpha):
4659 - Tolerate systems (including some Android installations) where
4660 madvise and MADV_DONTDUMP are available at build-time, but not at
4661 run time. Previously, these systems would notice a failed syscall
4662 and abort. Fixes bug 31570; bugfix on 0.4.1.1-alpha.
4663 - Tolerate systems (including some Linux installations) where
4664 madvise and/or MADV_DONTFORK are available at build-time, but not
4665 at run time. Previously, these systems would notice a failed
4666 syscall and abort. Fixes bug 31696; bugfix on 0.4.1.1-alpha.
4668 o Minor features (stem tests, backport from 0.4.2.1-alpha):
4669 - Change "make test-stem" so it only runs the stem tests that use
4670 tor. This change makes test-stem faster and more reliable. Closes
4673 o Minor bugfixes (build system, backport form 0.4.2.1-alpha):
4674 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
4675 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
4677 o Minor bugfixes (compilation, backport from 0.4.2.1-alpha):
4678 - Add more stub functions to fix compilation on Android with link-
4679 time optimization when --disable-module-dirauth is used.
4680 Previously, these compilation settings would make the compiler
4681 look for functions that didn't exist. Fixes bug 31552; bugfix
4683 - Suppress spurious float-conversion warnings from GCC when calling
4684 floating-point classifier functions on FreeBSD. Fixes part of bug
4685 31687; bugfix on 0.3.1.5-alpha.
4687 o Minor bugfixes (controller protocol):
4688 - Fix the MAPADDRESS controller command to accept one or more
4689 arguments. Previously, it required two or more arguments, and ignored
4690 the first. Fixes bug 31772; bugfix on 0.4.1.1-alpha.
4692 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6, backport from 0.4.2.1-alpha):
4693 - When extracting an IPv6 address from a PF-based proxy, verify that
4694 we are actually configured to receive an IPv6 address, and log an
4695 internal error if not. Fixes part of bug 31687; bugfix
4698 o Minor bugfixes (guards, backport from 0.4.2.1-alpha):
4699 - When tor is missing descriptors for some primary entry guards,
4700 make the log message less alarming. It's normal for descriptors to
4701 expire, as long as tor fetches new ones soon after. Fixes bug
4702 31657; bugfix on 0.3.3.1-alpha.
4704 o Minor bugfixes (logging, backport from 0.4.2.1-alpha):
4705 - Change log level of message "Hash of session info was not as
4706 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
4709 o Minor bugfixes (rust, backport from 0.4.2.1-alpha):
4710 - Correctly exclude a redundant rust build job in Travis. Fixes bug
4711 31463; bugfix on 0.3.5.4-alpha.
4713 o Minor bugfixes (v2 single onion services, backport from 0.4.2.1-alpha):
4714 - Always retry v2 single onion service intro and rend circuits with
4715 a 3-hop path. Previously, v2 single onion services used a 3-hop
4716 path when rendezvous circuits were retried after a remote or
4717 delayed failure, but a 1-hop path for immediate retries. Fixes bug
4718 23818; bugfix on 0.2.9.3-alpha.
4720 o Minor bugfixes (v3 single onion services, backport from 0.4.2.1-alpha):
4721 - Always retry v3 single onion service intro and rend circuits with
4722 a 3-hop path. Previously, v3 single onion services used a 3-hop
4723 path when rend circuits were retried after a remote or delayed
4724 failure, but a 1-hop path for immediate retries. Fixes bug 23818;
4725 bugfix on 0.3.2.1-alpha.
4726 - Make v3 single onion services fall back to a 3-hop intro, when all
4727 intro points are unreachable via a 1-hop path. Previously, v3
4728 single onion services failed when all intro nodes were unreachable
4729 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
4731 o Documentation (backport from 0.4.2.1-alpha):
4732 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
4733 notice.html so that operators no longer have to host it
4734 themselves. Closes ticket 31089.
4737 Changes in version 0.4.2.1-alpha - 2019-09-17
4738 This is the first alpha release in the 0.4.2.x series. It adds new
4739 defenses for denial-of-service attacks against onion services. It also
4740 includes numerous kinds of bugfixes and refactoring to help improve
4741 Tor's stability and ease of development.
4743 o Major features (onion service v3, denial of service):
4744 - Add onion service introduction denial of service defenses. Intro
4745 points can now rate-limit client introduction requests, using
4746 parameters that can be sent by the service within the
4747 ESTABLISH_INTRO cell. If the cell extension for this is not used,
4748 the intro point will honor the consensus parameters. Closes
4751 o Major bugfixes (circuit build, guard):
4752 - When considering upgrading circuits from "waiting for guard" to
4753 "open", always ignore circuits that are marked for close.
4754 Previously we could end up in the situation where a subsystem is
4755 notified of a circuit opening, but the circuit is still marked for
4756 close, leading to undesirable behavior. Fixes bug 30871; bugfix
4759 o Major bugfixes (crash, Linux, Android):
4760 - Tolerate systems (including some Android installations) where
4761 madvise and MADV_DONTDUMP are available at build-time, but not at
4762 run time. Previously, these systems would notice a failed syscall
4763 and abort. Fixes bug 31570; bugfix on 0.4.1.1-alpha.
4764 - Tolerate systems (including some Linux installations) where
4765 madvise and/or MADV_DONTFORK are available at build-time, but not
4766 at run time. Previously, these systems would notice a failed
4767 syscall and abort. Fixes bug 31696; bugfix on 0.4.1.1-alpha.
4769 o Minor features (best practices tracker):
4770 - Our best-practices tracker now integrates with our include-checker
4771 tool to keep track of how many layering violations we have not yet
4772 fixed. We hope to reduce this number over time to improve Tor's
4773 modularity. Closes ticket 31176.
4774 - Add a TOR_PRACTRACKER_OPTIONS variable for passing arguments to
4775 practracker from the environment. We may want this for continuous
4776 integration. Closes ticket 31309.
4777 - Give a warning rather than an error when a practracker exception
4778 is violated by a small amount, add a --list-overbroad option to
4779 practracker that lists exceptions that are stricter than they need
4780 to be, and provide an environment variable for disabling
4781 practracker. Closes ticket 30752.
4782 - Our best-practices tracker now looks at headers as well as C
4783 files. Closes ticket 31175.
4785 o Minor features (build system):
4786 - Add --disable-manpage and --disable-html-manual options to
4787 configure script. This will enable shortening build times by not
4788 building documentation. Resolves issue 19381.
4790 o Minor features (compilation):
4791 - Log a more useful error message when we are compiling and one of
4792 the compile-time hardening options we have selected can be linked
4793 but not executed. Closes ticket 27530.
4795 o Minor features (configuration):
4796 - The configuration code has been extended to allow splitting
4797 configuration data across multiple objects. Previously, all
4798 configuration data needed to be kept in a single object, which
4799 tended to become bloated. Closes ticket 31240.
4801 o Minor features (continuous integration):
4802 - When running CI builds on Travis, put some random data in
4803 ~/.torrc, to make sure no tests are reading the Tor configuration
4804 file from its default location. Resolves issue 30102.
4806 o Minor features (debugging):
4807 - Log a nonfatal assertion failure if we encounter a configuration
4808 line whose command is "CLEAR" but which has a nonempty value. This
4809 should be impossible, according to the rules of our configuration
4810 line parsing. Closes ticket 31529.
4812 o Minor features (git hooks):
4813 - Our pre-commit git hook now checks for a special file before
4814 running practracker, so that practracker only runs on branches
4815 that are based on master. Since the pre-push hook calls the pre-
4816 commit hook, practracker will also only run before pushes of
4817 branches based on master. Closes ticket 30979.
4819 o Minor features (git scripts):
4820 - Add a "--" command-line argument, to separate git-push-all.sh
4821 script arguments from arguments that are passed through to git
4822 push. Closes ticket 31314.
4823 - Add a -r <remote-name> argument to git-push-all.sh, so the script
4824 can push test branches to a personal remote. Closes ticket 31314.
4825 - Add a -t <test-branch-prefix> argument to git-merge-forward.sh and
4826 git-push-all.sh, which makes these scripts create, merge forward,
4827 and push test branches. Closes ticket 31314.
4828 - Add a -u argument to git-merge-forward.sh, so that the script can
4829 re-use existing test branches after a merge failure and fix.
4830 Closes ticket 31314.
4831 - Add a TOR_GIT_PUSH env var, which sets the default git push
4832 command and arguments for git-push-all.sh. Closes ticket 31314.
4833 - Add a TOR_PUSH_DELAY variable to git-push-all.sh, which makes the
4834 script push master and maint branches with a delay between each
4835 branch. These delays trigger the CI jobs in a set order, which
4836 should show the most likely failures first. Also make pushes
4837 atomic by default, and make the script pass any command-line
4838 arguments to git push. Closes ticket 29879.
4839 - Call the shellcheck script from the pre-commit hook. Closes
4841 - Skip pushing test branches that are the same as a remote
4842 maint/release/master branch in git-push-all.sh by default. Add a
4843 -s argument, so git-push-all.sh can push all test branches. Closes
4846 o Minor features (IPv6, logging):
4847 - Log IPv6 addresses as well as IPv4 addresses when describing
4848 routerinfos, routerstatuses, and nodes. Closes ticket 21003.
4850 o Minor features (onion service v3):
4851 - Do not allow single hop clients to fetch or post an HS descriptor
4852 from an HSDir. Closes ticket 24964.
4854 o Minor features (onion service):
4855 - Disallow single-hop clients at the introduction point. We've
4856 removed Tor2web support a while back and single-hop rendezvous
4857 attempts are blocked at the relays. This change should remove load
4858 off the network from spammy clients. Close ticket 24963.
4860 o Minor features (stem tests):
4861 - Change "make test-stem" so it only runs the stem tests that use
4862 tor. This change makes test-stem faster and more reliable. Closes
4865 o Minor features (testing):
4866 - Add a script to invoke "tor --dump-config" and "tor
4867 --verify-config" with various configuration options, and see
4868 whether tor's resulting configuration or error messages are what
4869 we expect. Use it for integration testing of our +Option and
4870 /Option flags. Closes ticket 31637.
4871 - Improve test coverage for our existing configuration parsing and
4872 management API. Closes ticket 30893.
4873 - Add integration tests to make sure that practracker gives the
4874 outputs we expect. Closes ticket 31477.
4875 - The practracker self-tests are now run as part of the Tor test
4876 suite. Closes ticket 31304.
4878 o Minor features (token bucket):
4879 - Implement a generic token bucket that uses a single counter, for
4880 use in anti-DoS onion service work. Closes ticket 30687.
4882 o Minor bugfixes (best practices tracker):
4883 - Fix a few issues in the best-practices script, including tests,
4884 tab tolerance, error reporting, and directory-exclusion logic.
4885 Fixes bug 29746; bugfix on 0.4.1.1-alpha.
4886 - When running check-best-practices, only consider files in the src
4887 subdirectory. Previously we had recursively considered all
4888 subdirectories, which made us get confused by the temporary
4889 directories made by "make distcheck". Fixes bug 31578; bugfix
4892 o Minor bugfixes (build system):
4893 - Do not include the deprecated <sys/sysctl.h> on Linux or Windows
4894 systems. Fixes bug 31673; bugfix on 0.2.5.4-alpha.
4896 o Minor bugfixes (chutney, makefiles, documentation):
4897 - "make test-network-all" now shows the warnings from each test-
4898 network.sh run on the console, so developers see new warnings
4899 early. We've also improved the documentation for this feature, and
4900 renamed a Makefile variable so the code is self-documenting. Fixes
4901 bug 30455; bugfix on 0.3.0.4-rc.
4903 o Minor bugfixes (compilation):
4904 - Add more stub functions to fix compilation on Android with link-
4905 time optimization when --disable-module-dirauth is used.
4906 Previously, these compilation settings would make the compiler
4907 look for functions that didn't exist. Fixes bug 31552; bugfix
4909 - Suppress spurious float-conversion warnings from GCC when calling
4910 floating-point classifier functions on FreeBSD. Fixes part of bug
4911 31687; bugfix on 0.3.1.5-alpha.
4913 o Minor bugfixes (configuration):
4914 - Invalid floating-point values in the configuration file are now
4915 treated as errors in the configuration. Previously, they were
4916 ignored and treated as zero. Fixes bug 31475; bugfix on 0.0.1.
4918 o Minor bugfixes (coverity):
4919 - Add an assertion when parsing a BEGIN cell so that coverity can be
4920 sure that we are not about to dereference a NULL address. Fixes
4921 bug 31026; bugfix on 0.2.4.7-alpha. This is CID 1447296.
4922 - In our siphash implementation, when building for coverity, use
4923 memcpy in place of a switch statement, so that coverity can tell
4924 we are not accessing out-of-bounds memory. Fixes bug 31025; bugfix
4925 on 0.2.8.1-alpha. This is tracked as CID 1447293 and 1447295.
4926 - Fix several coverity warnings from our unit tests. Fixes bug
4927 31030; bugfix on 0.2.4.1-alpha, 0.3.2.1-alpha, and 0.4.0.1-alpha.
4929 o Minor bugfixes (developer tooling):
4930 - Only log git script changes in the post-merge script when the
4931 merge was to the master branch. Fixes bug 31040; bugfix
4934 o Minor bugfixes (directory authorities):
4935 - Return a distinct status when formatting annotations fails. Fixes
4936 bug 30780; bugfix on 0.2.0.8-alpha.
4938 o Minor bugfixes (error handling):
4939 - On abort, try harder to flush the output buffers of log messages.
4940 On some platforms (macOS), log messages could be discarded when
4941 the process terminates. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
4942 - Report the tor version whenever an assertion fails. Previously, we
4943 only reported the Tor version on some crashes, and some non-fatal
4944 assertions. Fixes bug 31571; bugfix on 0.3.5.1-alpha.
4945 - When tor aborts due to an error, close log file descriptors before
4946 aborting. Closing the logs makes some OSes flush log file buffers,
4947 rather than deleting buffered log lines. Fixes bug 31594; bugfix
4950 o Minor bugfixes (FreeBSD, PF-based proxy, IPv6):
4951 - When extracting an IPv6 address from a PF-based proxy, verify that
4952 we are actually configured to receive an IPv6 address, and log an
4953 internal error if not. Fixes part of bug 31687; bugfix
4956 o Minor bugfixes (git hooks):
4957 - Remove a duplicate call to practracker from the pre-push hook. The
4958 pre-push hook already calls the pre-commit hook, which calls
4959 practracker. Fixes bug 31462; bugfix on 0.4.1.1-alpha.
4961 o Minor bugfixes (git scripts):
4962 - Stop hard-coding the bash path in the git scripts. Some OSes don't
4963 have bash in /usr/bin, others have an ancient bash at this path.
4964 Fixes bug 30840; bugfix on 0.4.0.1-alpha.
4965 - Stop hard-coding the tor master branch name and worktree path in
4966 the git scripts. Fixes bug 30841; bugfix on 0.4.0.1-alpha.
4967 - Allow git-push-all.sh to be run from any directory. Previously,
4968 the script only worked if run from an upstream worktree directory.
4969 Closes ticket 31678.
4971 o Minor bugfixes (guards):
4972 - When tor is missing descriptors for some primary entry guards,
4973 make the log message less alarming. It's normal for descriptors to
4974 expire, as long as tor fetches new ones soon after. Fixes bug
4975 31657; bugfix on 0.3.3.1-alpha.
4977 o Minor bugfixes (ipv6):
4978 - Check for private IPv6 addresses alongside their IPv4 equivalents
4979 when authorities check descriptors. Previously, we only checked
4980 for private IPv4 addresses. Fixes bug 31088; bugfix on
4981 0.2.3.21-rc. Patch by Neel Chauhan.
4982 - When parsing microdescriptors, we should check the IPv6 exit
4983 policy alongside IPv4. Previously, we checked both exit policies
4984 for only router info structures, while microdescriptors were
4985 IPv4-only. Fixes bug 27284; bugfix on 0.2.3.1-alpha. Patch by
4988 o Minor bugfixes (logging):
4989 - Change log level of message "Hash of session info was not as
4990 expected" to LOG_PROTOCOL_WARN. Fixes bug 12399; bugfix
4992 - Fix a code issue that would have broken our parsing of log domains
4993 as soon as we had 33 of them. Fortunately, we still only have 29.
4994 Fixes bug 31451; bugfix on 0.4.1.4-rc.
4996 o Minor bugfixes (memory management):
4997 - Stop leaking a small amount of memory in nt_service_install(), in
4998 unreachable code. Fixes bug 30799; bugfix on 0.2.0.7-alpha. Patch
5001 o Minor bugfixes (networking, IP addresses):
5002 - When parsing addresses via Tor's internal DNS lookup API, reject
5003 IPv4 addresses in square brackets, and accept IPv6 addresses in
5004 square brackets. This change completes the work started in 23082,
5005 making address parsing consistent between tor's internal DNS
5006 lookup and address parsing APIs. Fixes bug 30721; bugfix
5008 - When parsing addresses via Tor's internal address:port parsing and
5009 DNS lookup APIs, require IPv6 addresses with ports to have square
5010 brackets. But allow IPv6 addresses without ports, whether or not
5011 they have square brackets. Fixes bug 30721; bugfix
5014 o Minor bugfixes (onion service v3):
5015 - When purging the client descriptor cache, close any introduction
5016 point circuits associated with purged cache entries. This avoids
5017 picking those circuits later when connecting to the same
5018 introduction points. Fixes bug 30921; bugfix on 0.3.2.1-alpha.
5020 o Minor bugfixes (onion services):
5021 - In the hs_ident_circuit_t data structure, remove the unused field
5022 circuit_type and the respective argument in hs_ident_circuit_new().
5023 This field was set by clients (for introduction) and services (for
5024 introduction and rendezvous) but was never used afterwards. Fixes
5025 bug 31490; bugfix on 0.3.2.1-alpha. Patch by Neel Chauhan.
5027 o Minor bugfixes (operator tools):
5028 - Make tor-print-ed-signing-cert(1) print certificate expiration
5029 date in RFC 1123 and UNIX timestamp formats, to make output
5030 machine readable. Fixes bug 31012; bugfix on 0.3.5.1-alpha.
5032 o Minor bugfixes (rust):
5033 - Correctly exclude a redundant rust build job in Travis. Fixes bug
5034 31463; bugfix on 0.3.5.4-alpha.
5035 - Raise the minimum rustc version to 1.31.0, as checked by configure
5036 and CI. Fixes bug 31442; bugfix on 0.3.5.4-alpha.
5038 o Minor bugfixes (sendme, code structure):
5039 - Rename the trunnel SENDME file definition from sendme.trunnel to
5040 sendme_cell.trunnel to avoid having twice sendme.{c|h} in the
5041 repository. Fixes bug 30769; bugfix on 0.4.1.1-alpha.
5043 o Minor bugfixes (statistics):
5044 - Stop removing the ed25519 signature if the extra info file is too
5045 big. If the signature data was removed, but the keyword was kept,
5046 this could result in an unparseable extra info file. Fixes bug
5047 30958; bugfix on 0.2.7.2-alpha.
5049 o Minor bugfixes (subsystems):
5050 - Make the subsystem init order match the subsystem module
5051 dependencies. Call windows process security APIs as early as
5052 possible. Initialize logging before network and time, so that
5053 network and time can use logging. Fixes bug 31615; bugfix
5056 o Minor bugfixes (testing):
5057 - Teach the util/socketpair_ersatz test to work correctly when we
5058 have no network stack configured. Fixes bug 30804; bugfix
5061 o Minor bugfixes (v2 single onion services):
5062 - Always retry v2 single onion service intro and rend circuits with
5063 a 3-hop path. Previously, v2 single onion services used a 3-hop
5064 path when rendezvous circuits were retried after a remote or
5065 delayed failure, but a 1-hop path for immediate retries. Fixes bug
5066 23818; bugfix on 0.2.9.3-alpha.
5068 o Minor bugfixes (v3 single onion services):
5069 - Always retry v3 single onion service intro and rend circuits with
5070 a 3-hop path. Previously, v3 single onion services used a 3-hop
5071 path when rend circuits were retried after a remote or delayed
5072 failure, but a 1-hop path for immediate retries. Fixes bug 23818;
5073 bugfix on 0.3.2.1-alpha.
5074 - Make v3 single onion services fall back to a 3-hop intro, when all
5075 intro points are unreachable via a 1-hop path. Previously, v3
5076 single onion services failed when all intro nodes were unreachable
5077 via a 1-hop path. Fixes bug 23507; bugfix on 0.3.2.1-alpha.
5080 - Improve documentation in circuit padding subsystem. Patch by
5081 Tobias Pulls. Closes ticket 31113.
5082 - Include an example usage for IPv6 ORPort in our sample torrc.
5083 Closes ticket 31320; patch from Ali Raheem.
5084 - Use RFC 2397 data URL scheme to embed an image into tor-exit-
5085 notice.html so that operators no longer have to host it
5086 themselves. Closes ticket 31089.
5089 - No longer include recommended package digests in votes as detailed
5090 in proposal 301. The RecommendedPackages torrc option is
5091 deprecated and will no longer have any effect. "package" lines
5092 will still be considered when computing consensuses for consensus
5093 methods that include them. (This change has no effect on the list
5094 of recommended Tor versions, which is still in use.) Closes
5096 - Remove torctl.in from contrib/dist directory. Resolves
5100 - Run shellcheck for all non-third-party shell scripts that are
5101 shipped with Tor. Closes ticket 29533.
5102 - When checking shell scripts, ignore any user-created directories.
5103 Closes ticket 30967.
5105 o Code simplification and refactoring (config handling):
5106 - Extract our variable manipulation code from confparse.c to a new
5107 lower-level typedvar.h module. Closes ticket 30864.
5108 - Lower another layer of object management from confparse.c to a
5109 more general tool. Now typed structure members are accessible via
5110 an abstract type. Implements ticket 30914.
5111 - Move our backend logic for working with configuration and state
5112 files into a lower-level library, since it no longer depends on
5113 any tor-specific functionality. Closes ticket 31626.
5114 - Numerous simplifications in configuration-handling logic: remove
5115 duplicated macro definitions, replace magical names with flags,
5116 and refactor "TestingTorNetwork" to use the same default-option
5117 logic as the rest of Tor. Closes ticket 30935.
5118 - Replace our ad-hoc set of flags for configuration variables and
5119 configuration variable types with fine-grained orthogonal flags
5120 corresponding to the actual behavior we want. Closes ticket 31625.
5122 o Code simplification and refactoring (misc):
5123 - Eliminate some uses of lower-level control reply abstractions,
5124 primarily in the onion_helper functions. Closes ticket 30889.
5125 - Rework bootstrap tracking to use the new publish-subscribe
5126 subsystem. Closes ticket 29976.
5127 - Rewrite format_node_description() and router_get_verbose_nickname()
5128 to use strlcpy() and strlcat(). The previous implementation used
5129 memcpy() and pointer arithmetic, which was error-prone. Closes
5130 ticket 31545. This is CID 1452819.
5131 - Split extrainfo_dump_to_string() into smaller functions. Closes
5133 - Use the ptrdiff_t type consistently for expressing variable
5134 offsets and pointer differences. Previously we incorrectly (but
5135 harmlessly) used int and sometimes off_t for these cases. Closes
5137 - Use the subsystems mechanism to manage the main event loop code.
5138 Closes ticket 30806.
5139 - Various simplifications and minor improvements to the circuit
5140 padding machines. Patch by Tobias Pulls. Closes tickets 31112
5143 o Documentation (hard-coded directories):
5144 - Improve the documentation for the DirAuthority and FallbackDir
5145 torrc options. Closes ticket 30955.
5147 o Documentation (tor.1 man page):
5148 - Fix typo in tor.1 man page: the option is "--help", not "-help".
5149 Fixes bug 31008; bugfix on 0.2.2.9-alpha.
5152 Changes in version 0.4.1.5 - 2019-08-20
5153 This is the first stable release in the 0.4.1.x series. This series
5154 adds experimental circuit-level padding, authenticated SENDME cells to
5155 defend against certain attacks, and several performance improvements
5156 to save on CPU consumption. It fixes bugs in bootstrapping and v3
5157 onion services. It also includes numerous smaller features and
5158 bugfixes on earlier versions.
5160 Per our support policy, we will support the 0.4.1.x series for nine
5161 months, or until three months after the release of a stable 0.4.2.x:
5162 whichever is longer. If you need longer-term support, please stick
5163 with 0.3.5.x, which will we plan to support until Feb 2022.
5165 Below are the changes since 0.4.1.4-rc. For a complete list of changes
5166 since 0.4.0.5, see the ReleaseNotes file.
5168 o Directory authority changes:
5169 - The directory authority "dizum" has a new IP address. Closes
5172 o Minor features (circuit padding logging):
5173 - Demote noisy client-side warn logs about circuit padding to
5174 protocol warnings. Add additional log messages and circuit ID
5175 fields to help with bug 30992 and any other future issues.
5177 o Minor bugfixes (circuit padding negotiation):
5178 - Bump the circuit padding protocol version to explicitly signify
5179 that the HS setup machine support is finalized in 0.4.1.x-stable.
5180 This also means that 0.4.1.x-alpha clients will not negotiate
5181 padding with 0.4.1.x-stable relays, and 0.4.1.x-stable clients
5182 will not negotiate padding with 0.4.1.x-alpha relays (or 0.4.0.x
5183 relays). Fixes bug 31356; bugfix on 0.4.1.1-alpha.
5185 o Minor bugfixes (circuit padding):
5186 - Ignore non-padding cells on padding circuits. This addresses
5187 various warning messages from subsystems that were not expecting
5188 padding circuits. Fixes bug 30942; bugfix on 0.4.1.1-alpha.
5190 o Minor bugfixes (clock skew detection):
5191 - Don't believe clock skew results from NETINFO cells that appear to
5192 arrive before we sent the VERSIONS cells they are responding to.
5193 Previously, we would accept them up to 3 minutes "in the past".
5194 Fixes bug 31343; bugfix on 0.2.4.4-alpha.
5196 o Minor bugfixes (compatibility, standards compliance):
5197 - Fix a bug that would invoke undefined behavior on certain
5198 operating systems when trying to asprintf() a string exactly
5199 INT_MAX bytes long. We don't believe this is exploitable, but it's
5200 better to fix it anyway. Fixes bug 31001; bugfix on 0.2.2.11-alpha.
5201 Found and fixed by Tobias Stoeckmann.
5203 o Minor bugfixes (compilation warning):
5204 - Fix a compilation warning on Windows about casting a function
5205 pointer for GetTickCount64(). Fixes bug 31374; bugfix
5208 o Minor bugfixes (compilation):
5209 - Avoid using labs() on time_t, which can cause compilation warnings
5210 on 64-bit Windows builds. Fixes bug 31343; bugfix on 0.2.4.4-alpha.
5212 o Minor bugfixes (distribution):
5213 - Do not ship any temporary files found in the
5214 scripts/maint/practracker directory. Fixes bug 31311; bugfix
5217 o Testing (continuous integration):
5218 - In Travis, make stem log a controller trace to the console, and
5219 tail stem's tor log after failure. Closes ticket 30591.
5220 - In Travis, only run the stem tests that use a tor binary. Closes
5224 Changes in version 0.4.1.4-rc - 2019-07-25
5225 Tor 0.4.1.4-rc fixes a few bugs from previous versions of Tor, and
5226 updates to a new list of fallback directories. If no new bugs are
5227 found, the next release in the 0.4.1.x serious should be stable.
5229 o Major bugfixes (circuit build, guard):
5230 - When considering upgrading circuits from "waiting for guard" to
5231 "open", always ignore circuits that are marked for close. Otherwise,
5232 we can end up in the situation where a subsystem is notified that
5233 a closing circuit has just opened, leading to undesirable
5234 behavior. Fixes bug 30871; bugfix on 0.3.0.1-alpha.
5236 o Minor features (continuous integration):
5237 - Our Travis configuration now uses Chutney to run some network
5238 integration tests automatically. Closes ticket 29280.
5240 o Minor features (fallback directory list):
5241 - Replace the 157 fallbacks originally introduced in Tor 0.3.5.6-rc
5242 in December 2018 (of which ~122 were still functional), with a
5243 list of 148 fallbacks (70 new, 78 existing, 79 removed) generated
5244 in June 2019. Closes ticket 28795.
5246 o Minor bugfixes (circuit padding):
5247 - On relays, properly check that a padding machine is absent before
5248 logging a warning about it being absent. Fixes bug 30649; bugfix
5250 - Add two NULL checks in unreachable places to silence Coverity (CID
5251 144729 and 1447291) and better future-proof ourselves. Fixes bug
5252 31024; bugfix on 0.4.1.1-alpha.
5254 o Minor bugfixes (crash on exit):
5255 - Avoid a set of possible code paths that could try to use freed
5256 memory in routerlist_free() while Tor was exiting. Fixes bug
5257 31003; bugfix on 0.1.2.2-alpha.
5259 o Minor bugfixes (logging):
5260 - Fix a conflict between the flag used for messaging-domain log
5261 messages, and the LD_NO_MOCK testing flag. Fixes bug 31080; bugfix
5264 o Minor bugfixes (memory leaks):
5265 - Fix a trivial memory leak when parsing an invalid value from a
5266 download schedule in the configuration. Fixes bug 30894; bugfix
5269 o Code simplification and refactoring:
5270 - Remove some dead code from circpad_machine_remove_token() to fix
5271 some Coverity warnings (CID 1447298). Fixes bug 31027; bugfix
5275 Changes in version 0.4.1.3-alpha - 2019-06-25
5276 Tor 0.4.1.3-alpha resolves numerous bugs left over from the previous
5277 alpha, most of them from earlier release series.
5279 o Major bugfixes (Onion service reachability):
5280 - Properly clean up the introduction point map when circuits change
5281 purpose from onion service circuits to pathbias, measurement, or
5282 other circuit types. This should fix some service-side instances
5283 of introduction point failure. Fixes bug 29034; bugfix
5286 o Minor features (geoip):
5287 - Update geoip and geoip6 to the June 10 2019 Maxmind GeoLite2
5288 Country database. Closes ticket 30852.
5290 o Minor features (logging):
5291 - Give a more useful assertion failure message if we think we have
5292 minherit() but we fail to make a region non-inheritable. Give a
5293 compile-time warning if our support for minherit() is incomplete.
5294 Closes ticket 30686.
5296 o Minor bugfixes (circuit isolation):
5297 - Fix a logic error that prevented the SessionGroup sub-option from
5298 being accepted. Fixes bug 22619; bugfix on 0.2.7.2-alpha.
5300 o Minor bugfixes (continuous integration):
5301 - Allow the test-stem job to fail in Travis, because it sometimes
5302 hangs. Fixes bug 30744; bugfix on 0.3.5.4-alpha.
5303 - Skip test_rebind on macOS in Travis, because it is unreliable on
5304 macOS on Travis. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
5305 - Skip test_rebind when the TOR_SKIP_TEST_REBIND environment
5306 variable is set. Fixes bug 30713; bugfix on 0.3.5.1-alpha.
5308 o Minor bugfixes (directory authorities):
5309 - Stop crashing after parsing an unknown descriptor purpose
5310 annotation. We think this bug can only be triggered by modifying a
5311 local file. Fixes bug 30781; bugfix on 0.2.0.8-alpha.
5313 o Minor bugfixes (pluggable transports):
5314 - When running as a bridge with pluggable transports, always publish
5315 pluggable transport information in our extrainfo descriptor, even
5316 if ExtraInfoStatistics is 0. This information is needed by
5317 BridgeDB. Fixes bug 30956; bugfix on 0.4.1.1-alpha.
5320 - Mention URLs for Travis/Appveyor/Jenkins in ReleasingTor.md.
5321 Closes ticket 30630.
5324 Changes in version 0.4.1.2-alpha - 2019-06-06
5325 Tor 0.4.1.2-alpha resolves numerous bugs--some of them from the
5326 previous alpha, and some much older. It also contains minor testing
5327 improvements, and an improvement to the security of our authenticated
5328 SENDME implementation.
5330 o Major bugfixes (bridges):
5331 - Consider our directory information to have changed when our list
5332 of bridges changes. Previously, Tor would not re-compute the
5333 status of its directory information when bridges changed, and
5334 therefore would not realize that it was no longer able to build
5335 circuits. Fixes part of bug 29875.
5336 - Do not count previously configured working bridges towards our
5337 total of working bridges. Previously, when Tor's list of bridges
5338 changed, it would think that the old bridges were still usable,
5339 and delay fetching router descriptors for the new ones. Fixes part
5340 of bug 29875; bugfix on 0.3.0.1-alpha.
5342 o Major bugfixes (flow control, SENDME):
5343 - Decrement the stream-level package window after packaging a cell.
5344 Previously, it was done inside a log_debug() call, meaning that if
5345 debug logs were not enabled, the decrement would never happen, and
5346 thus the window would be out of sync with the other end point.
5347 Fixes bug 30628; bugfix on 0.4.1.1-alpha.
5349 o Major bugfixes (onion service reachability):
5350 - Properly clean up the introduction point map and associated state
5351 when circuits change purpose from onion service circuits to
5352 pathbias, measurement, or other circuit types. This may fix some
5353 instances of introduction point failure. Fixes bug 29034; bugfix
5356 o Minor features (authenticated SENDME):
5357 - Ensure that there is enough randomness on every circuit to prevent
5358 an attacker from successfully predicting the hashes they will need
5359 to include in authenticated SENDME cells. At a random interval, if
5360 we have not sent randomness already, we now leave some extra space
5361 at the end of a cell that we can fill with random bytes. Closes
5364 o Minor features (continuous integration):
5365 - When running coverage builds on Travis, we now set
5366 TOR_TEST_RNG_SEED, to avoid RNG-based coverage differences. Part
5369 o Minor features (maintenance):
5370 - Add a new "make autostyle" target that developers can use to apply
5371 all automatic Tor style and consistency conversions to the
5372 codebase. Closes ticket 30539.
5374 o Minor features (testing):
5375 - The circuitpadding tests now use a reproducible RNG implementation,
5376 so that if a test fails, we can learn why. Part of ticket 28878.
5377 - Tor's tests now support an environment variable, TOR_TEST_RNG_SEED,
5378 to set the RNG seed for tests that use a reproducible RNG. Part of
5380 - When running tests in coverage mode, take additional care to make
5381 our coverage deterministic, so that we can accurately track
5382 changes in code coverage. Closes ticket 30519.
5384 o Minor bugfixes (configuration, proxies):
5385 - Fix a bug that prevented us from supporting SOCKS5 proxies that
5386 want authentication along with configured (but unused!)
5387 ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha.
5389 o Minor bugfixes (controller):
5390 - POSTDESCRIPTOR requests should work again. Previously, they were
5391 broken if a "purpose=" flag was specified. Fixes bug 30580; bugfix
5393 - Repair the HSFETCH command so that it works again. Previously, it
5394 expected a body when it shouldn't have. Fixes bug 30646; bugfix
5397 o Minor bugfixes (developer tooling):
5398 - Fix pre-push hook to allow fixup and squash commits when pushing
5399 to non-upstream git remote. Fixes bug 30286; bugfix
5402 o Minor bugfixes (directory authority):
5403 - Move the "bandwidth-file-headers" line in directory authority
5404 votes so that it conforms to dir-spec.txt. Fixes bug 30316; bugfix
5407 o Minor bugfixes (NetBSD):
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.
5412 o Minor bugfixes (out-of-memory handler):
5413 - When purging the DNS cache because of an out-of-memory condition,
5414 try purging just the older entries at first. Previously, we would
5415 always purge the whole thing. Fixes bug 29617; bugfix
5418 o Minor bugfixes (portability):
5419 - Avoid crashing in our tor_vasprintf() implementation on systems
5420 that define neither vasprintf() nor _vscprintf(). (This bug has
5421 been here long enough that we question whether people are running
5422 Tor on such systems, but we're applying the fix out of caution.)
5423 Fixes bug 30561; bugfix on 0.2.8.2-alpha. Found and fixed by
5426 o Minor bugfixes (shutdown, libevent, memory safety):
5427 - Avoid use-after-free bugs when shutting down, by making sure that
5428 we shut down libevent only after shutting down all of its users.
5429 We believe these are harmless in practice, since they only occur
5430 on the shutdown path, and do not involve any attacker-controlled
5431 data. Fixes bug 30629; bugfix on 0.4.1.1-alpha.
5433 o Minor bugfixes (static analysis):
5434 - Fix several spurious Coverity warnings about the unit tests, to
5435 lower our chances of missing real warnings in the future. Fixes
5436 bug 30150; bugfix on 0.3.5.1-alpha and various other Tor versions.
5439 - Specify torrc paths (with empty files) when launching tor in
5440 integration tests; refrain from reading user and system torrcs.
5441 Resolves issue 29702.
5444 Changes in version 0.4.1.1-alpha - 2019-05-22
5445 This is the first alpha in the 0.4.1.x series. It introduces
5446 lightweight circuit padding to make some onion-service circuits harder
5447 to distinguish, includes a new "authenticated SENDME" feature to make
5448 certain denial-of-service attacks more difficult, and improves
5449 performance in several areas.
5451 o Major features (circuit padding):
5452 - Onion service clients now add padding cells at the start of their
5453 INTRODUCE and RENDEZVOUS circuits, to make those circuits' traffic
5454 look more like general purpose Exit traffic. The overhead for this
5455 is 2 extra cells in each direction for RENDEZVOUS circuits, and 1
5456 extra upstream cell and 10 downstream cells for INTRODUCE
5457 circuits. This feature is only enabled when also supported by the
5458 circuit's middle node. (Clients may specify fixed middle nodes
5459 with the MiddleNodes option, and may force-disable this feature
5460 with the CircuitPadding option.) Closes ticket 28634.
5462 o Major features (code organization):
5463 - Tor now includes a generic publish-subscribe message-passing
5464 subsystem that we can use to organize intermodule dependencies. We
5465 hope to use this to reduce dependencies between modules that don't
5466 need to be related, and to generally simplify our codebase. Closes
5469 o Major features (controller protocol):
5470 - Controller commands are now parsed using a generalized parsing
5471 subsystem. Previously, each controller command was responsible for
5472 parsing its own input, which led to strange inconsistencies.
5473 Closes ticket 30091.
5475 o Major features (flow control):
5476 - Implement authenticated SENDMEs as detailed in proposal 289. A
5477 SENDME cell now includes the digest of the traffic that it
5478 acknowledges, so that once an end point receives the SENDME, it
5479 can confirm the other side's knowledge of the previous cells that
5480 were sent, and prevent certain types of denial-of-service attacks.
5481 This behavior is controlled by two new consensus parameters: see
5482 the proposal for more details. Fixes ticket 26288.
5484 o Major features (performance):
5485 - Our node selection algorithm now excludes nodes in linear time.
5486 Previously, the algorithm was quadratic, which could slow down
5487 heavily used onion services. Closes ticket 30307.
5489 o Major features (performance, RNG):
5490 - Tor now constructs a fast secure pseudorandom number generator for
5491 each thread, to use when performance is critical. This PRNG is
5492 based on AES-CTR, using a buffering construction similar to
5493 libottery and the (newer) OpenBSD arc4random() code. It
5494 outperforms OpenSSL 1.1.1a's CSPRNG by roughly a factor of 100 for
5495 small outputs. Although we believe it to be cryptographically
5496 strong, we are only using it when necessary for performance.
5497 Implements tickets 29023 and 29536.
5499 o Major bugfixes (onion service v3):
5500 - Fix an unreachable bug in which an introduction point could try to
5501 send an INTRODUCE_ACK with a status code that Trunnel would refuse
5502 to encode, leading the relay to assert(). We've consolidated the
5503 ABI values into Trunnel now. Fixes bug 30454; bugfix
5505 - Clients can now handle unknown status codes from INTRODUCE_ACK
5506 cells. (The NACK behavior will stay the same.) This will allow us
5507 to extend status codes in the future without breaking the normal
5508 client behavior. Fixes another part of bug 30454; bugfix
5511 o Minor features (circuit padding):
5512 - We now use a fast PRNG when scheduling circuit padding. Part of
5514 - Allow the padding machine designer to pick the edges of their
5515 histogram instead of trying to compute them automatically using an
5516 exponential formula. Resolves some undefined behavior in the case
5517 of small histograms and allows greater flexibility on machine
5518 design. Closes ticket 29298; bugfix on 0.4.0.1-alpha.
5519 - Allow circuit padding machines to hold a circuit open until they
5520 are done padding it. Closes ticket 28780.
5522 o Minor features (compile-time modules):
5523 - Add a "--list-modules" command to print a list of which compile-
5524 time modules are enabled. Closes ticket 30452.
5526 o Minor features (continuous integration):
5527 - Remove sudo configuration lines from .travis.yml as they are no
5528 longer needed with current Travis build environment. Resolves
5530 - In Travis, show stem's tor log after failure. Closes ticket 30234.
5532 o Minor features (controller):
5533 - Add onion service version 3 support to the HSFETCH command.
5534 Previously, only version 2 onion services were supported. Closes
5535 ticket 25417. Patch by Neel Chauhan.
5537 o Minor features (debugging):
5538 - Introduce tor_assertf() and tor_assertf_nonfatal() to enable
5539 logging of additional information during assert failure. Now we
5540 can use format strings to include information for trouble
5541 shooting. Resolves ticket 29662.
5543 o Minor features (defense in depth):
5544 - In smartlist_remove_keeporder(), set unused pointers to NULL, in
5545 case a bug causes them to be used later. Closes ticket 30176.
5546 Patch from Tobias Stoeckmann.
5547 - Tor now uses a cryptographically strong PRNG even for decisions
5548 that we do not believe are security-sensitive. Previously, for
5549 performance reasons, we had used a trivially predictable linear
5550 congruential generator algorithm for certain load-balancing and
5551 statistical sampling decisions. Now we use our fast RNG in those
5552 cases. Closes ticket 29542.
5554 o Minor features (developer tools):
5555 - Tor's "practracker" test script now checks for files and functions
5556 that seem too long and complicated. Existing overlong functions
5557 and files are accepted for now, but should eventually be
5558 refactored. Closes ticket 29221.
5559 - Add some scripts used for git maintenance to scripts/git. Closes
5561 - Call practracker from pre-push and pre-commit git hooks to let
5562 developers know if they made any code style violations. Closes
5564 - Add a script to check that each header has a well-formed and
5565 unique guard macro. Closes ticket 29756.
5567 o Minor features (geoip):
5568 - Update geoip and geoip6 to the May 13 2019 Maxmind GeoLite2
5569 Country database. Closes ticket 30522.
5571 o Minor features (HTTP tunnel):
5572 - Return an informative web page when the HTTPTunnelPort is used as
5573 an HTTP proxy. Closes ticket 27821, patch by "eighthave".
5575 o Minor features (IPv6, v3 onion services):
5576 - Make v3 onion services put IPv6 addresses in service descriptors.
5577 Before this change, service descriptors only contained IPv4
5578 addresses. Implements 26992.
5580 o Minor features (modularity):
5581 - The "--disable-module-dirauth" compile-time option now disables
5582 even more dirauth-only code. Closes ticket 30345.
5584 o Minor features (performance):
5585 - Use OpenSSL's implementations of SHA3 when available (in OpenSSL
5586 1.1.1 and later), since they tend to be faster than tiny-keccak.
5587 Closes ticket 28837.
5589 o Minor features (testing):
5590 - Tor's unit test code now contains helper functions to replace the
5591 PRNG with a deterministic or reproducible version for testing.
5592 Previously, various tests implemented this in various ways.
5593 Implements ticket 29732.
5594 - We now have a script, cov-test-determinism.sh, to identify places
5595 where our unit test coverage has become nondeterministic. Closes
5597 - Check that representative subsets of values of `int` and `unsigned
5598 int` can be represented by `void *`. Resolves issue 29537.
5600 o Minor bugfixes (bridge authority):
5601 - Bridge authorities now set bridges as running or non-running when
5602 about to dump their status to a file. Previously, they set bridges
5603 as running in response to a GETINFO command, but those shouldn't
5604 modify data structures. Fixes bug 24490; bugfix on 0.2.0.13-alpha.
5605 Patch by Neel Chauhan.
5607 o Minor bugfixes (channel padding statistics):
5608 - Channel padding write totals and padding-enabled totals are now
5609 counted properly in relay extrainfo descriptors. Fixes bug 29231;
5610 bugfix on 0.3.1.1-alpha.
5612 o Minor bugfixes (circuit padding):
5613 - Add a "CircuitPadding" torrc option to disable circuit padding.
5614 Fixes bug 28693; bugfix on 0.4.0.1-alpha.
5615 - Allow circuit padding machines to specify that they do not
5616 contribute much overhead, and provide consensus flags and torrc
5617 options to force clients to only use these low overhead machines.
5618 Fixes bug 29203; bugfix on 0.4.0.1-alpha.
5619 - Provide a consensus parameter to fully disable circuit padding, to
5620 be used in emergency network overload situations. Fixes bug 30173;
5621 bugfix on 0.4.0.1-alpha.
5622 - The circuit padding subsystem will no longer schedule padding if
5623 dormant mode is enabled. Fixes bug 28636; bugfix on 0.4.0.1-alpha.
5624 - Inspect a circuit-level cell queue before sending padding, to
5625 avoid sending padding while too much data is already queued. Fixes
5626 bug 29204; bugfix on 0.4.0.1-alpha.
5627 - Avoid calling monotime_absolute_usec() in circuit padding machines
5628 that do not use token removal or circuit RTT estimation. Fixes bug
5629 29085; bugfix on 0.4.0.1-alpha.
5631 o Minor bugfixes (compilation, unusual configurations):
5632 - Avoid failures when building with the ALL_BUGS_ARE_FATAL option
5633 due to missing declarations of abort(), and prevent other such
5634 failures in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha.
5636 o Minor bugfixes (controller protocol):
5637 - Teach the controller parser to distinguish an object preceded by
5638 an argument list from one without. Previously, it couldn't
5639 distinguish an argument list from the first line of a multiline
5640 object. Fixes bug 29984; bugfix on 0.2.3.8-alpha.
5642 o Minor bugfixes (directory authority, ipv6):
5643 - Directory authorities with IPv6 support now always mark themselves
5644 as reachable via IPv6. Fixes bug 24338; bugfix on 0.2.4.1-alpha.
5645 Patch by Neel Chauhan.
5647 o Minor bugfixes (documentation):
5648 - Improve the documentation for using MapAddress with ".exit". Fixes
5649 bug 30109; bugfix on 0.1.0.1-rc.
5650 - Improve the monotonic time module and function documentation to
5651 explain what "monotonic" actually means, and document some results
5652 that have surprised people. Fixes bug 29640; bugfix
5654 - Use proper formatting when providing an example on quoting options
5655 that contain whitespace. Fixes bug 29635; bugfix on 0.2.3.18-rc.
5657 o Minor bugfixes (logging):
5658 - Do not log a warning when running with an OpenSSL version other
5659 than the one Tor was compiled with, if the two versions should be
5660 compatible. Previously, we would warn whenever the version was
5661 different. Fixes bug 30190; bugfix on 0.2.4.2-alpha.
5662 - Warn operators when the MyFamily option is set but ContactInfo is
5663 missing, as the latter should be set too. Fixes bug 25110; bugfix
5666 o Minor bugfixes (memory leak):
5667 - Avoid a minor memory leak that could occur on relays when failing
5668 to create a "keys" directory. Fixes bug 30148; bugfix
5671 o Minor bugfixes (onion services):
5672 - Avoid a GCC 9.1.1 warning (and possible crash depending on libc
5673 implemenation) when failing to load an onion service client
5674 authorization file. Fixes bug 30475; bugfix on 0.3.5.1-alpha.
5675 - When refusing to launch a controller's HSFETCH request because of
5676 rate-limiting, respond to the controller with a new response,
5677 "QUERY_RATE_LIMITED". Previously, we would log QUERY_NO_HSDIR for
5678 this case. Fixes bug 28269; bugfix on 0.3.1.1-alpha. Patch by
5680 - When relaunching a circuit to a rendezvous service, mark the
5681 circuit as needing high-uptime routers as appropriate. Fixes bug
5682 17357; bugfix on 0.1.0.1-rc. Patch by Neel Chauhan.
5683 - Stop ignoring IPv6 link specifiers sent to v3 onion services.
5684 (IPv6 support for v3 onion services is still incomplete: see
5685 ticket 23493 for details.) Fixes bug 23588; bugfix on
5686 0.3.2.1-alpha. Patch by Neel Chauhan.
5688 o Minor bugfixes (onion services, performance):
5689 - When building circuits to onion services, call tor_addr_parse()
5690 less often. Previously, we called tor_addr_parse() in
5691 circuit_is_acceptable() even if its output wasn't used. This
5692 change should improve performance when building circuits. Fixes
5693 bug 22210; bugfix on 0.2.8.12. Patch by Neel Chauhan.
5695 o Minor bugfixes (performance):
5696 - When checking whether a node is a bridge, use a fast check to make
5697 sure that its identity is set. Previously, we used a constant-time
5698 check, which is not necessary in this case. Fixes bug 30308;
5699 bugfix on 0.3.5.1-alpha.
5701 o Minor bugfixes (pluggable transports):
5702 - Tor now sets TOR_PT_EXIT_ON_STDIN_CLOSE=1 for client transports as
5703 well as servers. Fixes bug 25614; bugfix on 0.2.7.1-alpha.
5705 o Minor bugfixes (probability distributions):
5706 - Refactor and improve parts of the probability distribution code
5707 that made Coverity complain. Fixes bug 29805; bugfix
5710 o Minor bugfixes (python):
5711 - Stop assuming that /usr/bin/python3 exists. For scripts that work
5712 with python2, use /usr/bin/python. Otherwise, use /usr/bin/env
5713 python3. Fixes bug 29913; bugfix on 0.2.5.3-alpha.
5715 o Minor bugfixes (relay):
5716 - When running as a relay, if IPv6Exit is set to 1 while ExitRelay
5717 is auto, act as if ExitRelay is 1. Previously, we would ignore
5718 IPv6Exit if ExitRelay was 0 or auto. Fixes bug 29613; bugfix on
5719 0.3.5.1-alpha. Patch by Neel Chauhan.
5721 o Minor bugfixes (stats):
5722 - When ExtraInfoStatistics is 0, stop including bandwidth usage
5723 statistics, GeoIPFile hashes, ServerTransportPlugin lines, and
5724 bridge statistics by country in extra-info documents. Fixes bug
5725 29018; bugfix on 0.2.4.1-alpha.
5727 o Minor bugfixes (testing):
5728 - Call setrlimit() to disable core dumps in test_bt_cl.c. Previously
5729 we used `ulimit -c` in test_bt.sh, which violates POSIX shell
5730 compatibility. Fixes bug 29061; bugfix on 0.3.5.1-alpha.
5731 - Fix some incorrect code in the v3 onion service unit tests. Fixes
5732 bug 29243; bugfix on 0.3.2.1-alpha.
5733 - In the "routerkeys/*" tests, check the return values of mkdir()
5734 for possible failures. Fixes bug 29939; bugfix on 0.2.7.2-alpha.
5735 Found by Coverity as CID 1444254.
5736 - Split test_utils_general() into several smaller test functions.
5737 This makes it easier to perform resource deallocation on assert
5738 failure, and fixes Coverity warnings CID 1444117 and CID 1444118.
5739 Fixes bug 29823; bugfix on 0.2.9.1-alpha.
5741 o Minor bugfixes (tor-resolve):
5742 - Fix a memory leak in tor-resolve that could happen if Tor gave it
5743 a malformed SOCKS response. (Memory leaks in tor-resolve don't
5744 actually matter, but it's good to fix them anyway.) Fixes bug
5745 30151; bugfix on 0.4.0.1-alpha.
5747 o Code simplification and refactoring:
5748 - Abstract out the low-level formatting of replies on the control
5749 port. Implements ticket 30007.
5750 - Add several assertions in an attempt to fix some Coverity
5751 warnings. Closes ticket 30149.
5752 - Introduce a connection_dir_buf_add() helper function that checks
5753 for compress_state of dir_connection_t and automatically writes a
5754 string to directory connection with or without compression.
5755 Resolves issue 28816.
5756 - Make the base32_decode() API return the number of bytes written,
5757 for consistency with base64_decode(). Closes ticket 28913.
5758 - Move most relay-only periodic events out of mainloop.c into the
5759 relay subsystem. Closes ticket 30414.
5760 - Refactor and encapsulate parts of the codebase that manipulate
5761 crypt_path_t objects. Resolves issue 30236.
5762 - Refactor several places in our code that Coverity incorrectly
5763 believed might have memory leaks. Closes ticket 30147.
5764 - Remove redundant return values in crypto_format, and the
5765 associated return value checks elsewhere in the code. Make the
5766 implementations in crypto_format consistent, and remove redundant
5767 code. Resolves ticket 29660.
5768 - Rename tor_mem_is_zero() to fast_mem_is_zero(), to emphasize that
5769 it is not a constant-time function. Closes ticket 30309.
5770 - Replace hs_desc_link_specifier_t with link_specifier_t, and remove
5771 all hs_desc_link_specifier_t-specific code. Fixes bug 22781;
5772 bugfix on 0.3.2.1-alpha.
5773 - Simplify v3 onion service link specifier handling code. Fixes bug
5774 23576; bugfix on 0.3.2.1-alpha.
5775 - Split crypto_digest.c into NSS code, OpenSSL code, and shared
5776 code. Resolves ticket 29108.
5777 - Split control.c into several submodules, in preparation for
5778 distributing its current responsibilities throughout the codebase.
5779 Closes ticket 29894.
5780 - Start to move responsibility for knowing about periodic events to
5781 the appropriate subsystems, so that the mainloop doesn't need to
5782 know all the periodic events in the rest of the codebase.
5783 Implements tickets 30293 and 30294.
5786 - Document how to find git commits and tags for bug fixes in
5787 CodingStandards.md. Update some file documentation. Closes
5791 - Remove the linux-tor-prio.sh script from contrib/operator-tools
5792 directory. Resolves issue 29434.
5793 - Remove the obsolete OpenSUSE initscript. Resolves issue 30076.
5794 - Remove the obsolete script at contrib/dist/tor.sh.in. Resolves
5797 o Code simplification and refactoring (shell scripts):
5798 - Clean up many of our shell scripts to fix shellcheck warnings.
5799 These include autogen.sh (ticket 26069), test_keygen.sh (ticket
5800 29062), test_switch_id.sh (ticket 29065), test_rebind.sh (ticket
5801 29063), src/test/fuzz/minimize.sh (ticket 30079), test_rust.sh
5802 (ticket 29064), torify (ticket 29070), asciidoc-helper.sh (29926),
5803 fuzz_multi.sh (30077), fuzz_static_testcases.sh (ticket 29059),
5804 nagios-check-tor-authority-cert (ticket 29071),
5805 src/test/fuzz/fixup_filenames.sh (ticket 30078), test-network.sh
5806 (ticket 29060), test_key_expiration.sh (ticket 30002),
5807 zero_length_keys.sh (ticket 29068), and test_workqueue_*.sh
5810 o Testing (chutney):
5811 - In "make test-network-all", test IPv6-only v3 single onion
5812 services, using the chutney network single-onion-v23-ipv6-md.
5813 Closes ticket 27251.
5816 Changes in version 0.4.0.5 - 2019-05-02
5817 This is the first stable release in the 0.4.0.x series. It contains
5818 improvements for power management and bootstrap reporting, as well as
5819 preliminary backend support for circuit padding to prevent some kinds
5820 of traffic analysis. It also continues our work in refactoring Tor for
5821 long-term maintainability.
5823 Per our support policy, we will support the 0.4.0.x series for nine
5824 months, or until three months after the release of a stable 0.4.1.x:
5825 whichever is longer. If you need longer-term support, please stick
5826 with 0.3.5.x, which will we plan to support until Feb 2022.
5828 Below are the changes since 0.4.0.4-rc. For a complete list of changes
5829 since 0.3.5.7, see the ReleaseNotes file.
5831 o Minor features (continuous integration):
5832 - In Travis, tell timelimit to use stem's backtrace signals, and
5833 launch python directly from timelimit, so python receives the
5834 signals from timelimit, rather than make. Closes ticket 30117.
5836 o Minor features (diagnostic):
5837 - Add more diagnostic log messages in an attempt to solve the issue
5838 of NUL bytes appearing in a microdescriptor cache. Related to
5841 o Minor features (testing):
5842 - Use the approx_time() function when setting the "Expires" header
5843 in directory replies, to make them more testable. Needed for
5846 o Minor bugfixes (rust):
5847 - Abort on panic in all build profiles, instead of potentially
5848 unwinding into C code. Fixes bug 27199; bugfix on 0.3.3.1-alpha.
5850 o Minor bugfixes (shellcheck):
5851 - Look for scripts in their correct locations during "make
5852 shellcheck". Previously we had looked in the wrong place during
5853 out-of-tree builds. Fixes bug 30263; bugfix on 0.4.0.1-alpha.
5855 o Minor bugfixes (testing):
5856 - Check the time in the "Expires" header using approx_time(). Fixes
5857 bug 30001; bugfix on 0.4.0.4-rc.
5859 o Minor bugfixes (UI):
5860 - Lower log level of unlink() errors during bootstrap. Fixes bug
5861 29930; bugfix on 0.4.0.1-alpha.
5864 Changes in version 0.4.0.4-rc - 2019-04-11
5865 Tor 0.4.0.4-rc is the first release candidate in its series; it fixes
5866 several bugs from earlier versions, including some that had affected
5867 stability, and one that prevented relays from working with NSS.
5869 o Major bugfixes (NSS, relay):
5870 - When running with NSS, disable TLS 1.2 ciphersuites that use
5871 SHA384 for their PRF. Due to an NSS bug, the TLS key exporters for
5872 these ciphersuites don't work -- which caused relays to fail to
5873 handshake with one another when these ciphersuites were enabled.
5874 Fixes bug 29241; bugfix on 0.3.5.1-alpha.
5876 o Minor features (bandwidth authority):
5877 - Make bandwidth authorities ignore relays that are reported in the
5878 bandwidth file with the flag "vote=0". This change allows us to
5879 report unmeasured relays for diagnostic reasons without including
5880 their bandwidth in the bandwidth authorities' vote. Closes
5882 - When a directory authority is using a bandwidth file to obtain the
5883 bandwidth values that will be included in the next vote, serve
5884 this bandwidth file at /tor/status-vote/next/bandwidth. Closes
5887 o Minor features (circuit padding):
5888 - Stop warning about undefined behavior in the probability
5889 distribution tests. Float division by zero may technically be
5890 undefined behavior in C, but it's well defined in IEEE 754.
5891 Partial backport of 29298. Closes ticket 29527; bugfix
5894 o Minor features (continuous integration):
5895 - On Travis Rust builds, cleanup Rust registry and refrain from
5896 caching the "target/" directory to speed up builds. Resolves
5899 o Minor features (dormant mode):
5900 - Add a DormantCanceledByStartup option to tell Tor that it should
5901 treat a startup event as cancelling any previous dormant state.
5902 Integrators should use this option with caution: it should only be
5903 used if Tor is being started because of something that the user
5904 did, and not if Tor is being automatically started in the
5905 background. Closes ticket 29357.
5907 o Minor features (geoip):
5908 - Update geoip and geoip6 to the April 2 2019 Maxmind GeoLite2
5909 Country database. Closes ticket 29992.
5911 o Minor features (NSS, diagnostic):
5912 - Try to log an error from NSS (if there is any) and a more useful
5913 description of our situation if we are using NSS and a call to
5914 SSL_ExportKeyingMaterial() fails. Diagnostic for ticket 29241.
5916 o Minor bugfixes (security):
5917 - Fix a potential double free bug when reading huge bandwidth files.
5918 The issue is not exploitable in the current Tor network because
5919 the vulnerable code is only reached when directory authorities
5920 read bandwidth files, but bandwidth files come from a trusted
5921 source (usually the authorities themselves). Furthermore, the
5922 issue is only exploitable in rare (non-POSIX) 32-bit architectures,
5923 which are not used by any of the current authorities. Fixes bug
5924 30040; bugfix on 0.3.5.1-alpha. Bug found and fixed by
5926 - Verify in more places that we are not about to create a buffer
5927 with more than INT_MAX bytes, to avoid possible OOB access in the
5928 event of bugs. Fixes bug 30041; bugfix on 0.2.0.16. Found and
5929 fixed by Tobias Stoeckmann.
5931 o Minor bugfix (continuous integration):
5932 - Reset coverage state on disk after Travis CI has finished. This
5933 should prevent future coverage merge errors from causing the test
5934 suite for the "process" subsystem to fail. The process subsystem
5935 was introduced in 0.4.0.1-alpha. Fixes bug 29036; bugfix
5937 - Terminate test-stem if it takes more than 9.5 minutes to run.
5938 (Travis terminates the job after 10 minutes of no output.)
5939 Diagnostic for 29437. Fixes bug 30011; bugfix on 0.3.5.4-alpha.
5941 o Minor bugfixes (bootstrap reporting):
5942 - During bootstrap reporting, correctly distinguish pluggable
5943 transports from plain proxies. Fixes bug 28925; bugfix
5946 o Minor bugfixes (C correctness):
5947 - Fix an unlikely memory leak in consensus_diff_apply(). Fixes bug
5948 29824; bugfix on 0.3.1.1-alpha. This is Coverity warning
5951 o Minor bugfixes (circuitpadding testing):
5952 - Minor tweaks to avoid rare test failures related to timers and
5953 monotonic time. Fixes bug 29500; bugfix on 0.4.0.1-alpha.
5955 o Minor bugfixes (directory authorities):
5956 - Actually include the bandwidth-file-digest line in directory
5957 authority votes. Fixes bug 29959; bugfix on 0.4.0.2-alpha.
5959 o Minor bugfixes (logging):
5960 - On Windows, when errors cause us to reload a consensus from disk,
5961 tell the user that we are retrying at log level "notice".
5962 Previously we only logged this information at "info", which was
5963 confusing because the errors themselves were logged at "warning".
5964 Improves previous fix for 28614. Fixes bug 30004; bugfix
5967 o Minor bugfixes (pluggable transports):
5968 - Restore old behavior when it comes to discovering the path of a
5969 given Pluggable Transport executable file. A change in
5970 0.4.0.1-alpha had broken this behavior on paths containing a
5971 space. Fixes bug 29874; bugfix on 0.4.0.1-alpha.
5973 o Minor bugfixes (testing):
5974 - Backport the 0.3.4 src/test/test-network.sh to 0.2.9. We need a
5975 recent test-network.sh to use new chutney features in CI. Fixes
5976 bug 29703; bugfix on 0.2.9.1-alpha.
5977 - Fix a test failure on Windows caused by an unexpected "BUG"
5978 warning in our tests for tor_gmtime_r(-1). Fixes bug 29922; bugfix
5981 o Minor bugfixes (TLS protocol):
5982 - When classifying a client's selection of TLS ciphers, if the
5983 client ciphers are not yet available, do not cache the result.
5984 Previously, we had cached the unavailability of the cipher list
5985 and never looked again, which in turn led us to assume that the
5986 client only supported the ancient V1 link protocol. This, in turn,
5987 was causing Stem integration tests to stall in some cases. Fixes
5988 bug 30021; bugfix on 0.2.4.8-alpha.
5990 o Code simplification and refactoring:
5991 - Introduce a connection_dir_buf_add() helper function that detects
5992 whether compression is in use, and adds a string accordingly.
5993 Resolves issue 28816.
5994 - Refactor handle_get_next_bandwidth() to use
5995 connection_dir_buf_add(). Implements ticket 29897.
5998 - Clarify that Tor performs stream isolation among *Port listeners
5999 by default. Resolves issue 29121.
6002 Changes in version 0.4.0.3-alpha - 2019-03-22
6003 Tor 0.4.0.3-alpha is the third in its series; it fixes several small
6004 bugs from earlier versions.
6006 o Minor features (address selection):
6007 - Treat the subnet 100.64.0.0/10 as public for some purposes;
6008 private for others. This subnet is the RFC 6598 (Carrier Grade
6009 NAT) IP range, and is deployed by many ISPs as an alternative to
6010 RFC 1918 that does not break existing internal networks. Tor now
6011 blocks SOCKS and control ports on these addresses and warns users
6012 if client ports or ExtORPorts are listening on a RFC 6598 address.
6013 Closes ticket 28525. Patch by Neel Chauhan.
6015 o Minor features (geoip):
6016 - Update geoip and geoip6 to the March 4 2019 Maxmind GeoLite2
6017 Country database. Closes ticket 29666.
6019 o Minor bugfixes (circuitpadding):
6020 - Inspect the circuit-level cell queue before sending padding, to
6021 avoid sending padding when too much data is queued. Fixes bug
6022 29204; bugfix on 0.4.0.1-alpha.
6024 o Minor bugfixes (logging):
6025 - Correct a misleading error message when IPv4Only or IPv6Only is
6026 used but the resolved address can not be interpreted as an address
6027 of the specified IP version. Fixes bug 13221; bugfix on
6028 0.2.3.9-alpha. Patch from Kris Katterjohn.
6029 - Log the correct port number for listening sockets when "auto" is
6030 used to let Tor pick the port number. Previously, port 0 was
6031 logged instead of the actual port number. Fixes bug 29144; bugfix
6032 on 0.3.5.1-alpha. Patch from Kris Katterjohn.
6033 - Stop logging a BUG() warning when Tor is waiting for exit
6034 descriptors. Fixes bug 28656; bugfix on 0.3.5.1-alpha.
6036 o Minor bugfixes (memory management):
6037 - Refactor the shared random state's memory management so that it
6038 actually takes ownership of the shared random value pointers.
6039 Fixes bug 29706; bugfix on 0.2.9.1-alpha.
6041 o Minor bugfixes (memory management, testing):
6042 - Stop leaking parts of the shared random state in the shared-random
6043 unit tests. Fixes bug 29599; bugfix on 0.2.9.1-alpha.
6045 o Minor bugfixes (pluggable transports):
6046 - Fix an assertion failure crash bug when a pluggable transport is
6047 terminated during the bootstrap phase. Fixes bug 29562; bugfix
6050 o Minor bugfixes (Rust, protover):
6051 - Add a missing "Padding" value to the Rust implementation of
6052 protover. Fixes bug 29631; bugfix on 0.4.0.1-alpha.
6054 o Minor bugfixes (single onion services):
6055 - Allow connections to single onion services to remain idle without
6056 being disconnected. Previously, relays acting as rendezvous points
6057 for single onion services were mistakenly closing idle rendezvous
6058 circuits after 60 seconds, thinking that they were unused
6059 directory-fetching circuits that had served their purpose. Fixes
6060 bug 29665; bugfix on 0.2.1.26.
6062 o Minor bugfixes (stats):
6063 - When ExtraInfoStatistics is 0, stop including PaddingStatistics in
6064 relay and bridge extra-info documents. Fixes bug 29017; bugfix
6067 o Minor bugfixes (testing):
6068 - Downgrade some LOG_ERR messages in the address/* tests to
6069 warnings. The LOG_ERR messages were occurring when we had no
6070 configured network. We were failing the unit tests, because we
6071 backported 28668 to 0.3.5.8, but did not backport 29530. Fixes bug
6072 29530; bugfix on 0.3.5.8.
6073 - Fix our gcov wrapper script to look for object files at the
6074 correct locations. Fixes bug 29435; bugfix on 0.3.5.1-alpha.
6075 - Decrease the false positive rate of stochastic probability
6076 distribution tests. Fixes bug 29693; bugfix on 0.4.0.1-alpha.
6078 o Minor bugfixes (Windows, CI):
6079 - Skip the Appveyor 32-bit Windows Server 2016 job, and 64-bit
6080 Windows Server 2012 R2 job. The remaining 2 jobs still provide
6081 coverage of 64/32-bit, and Windows Server 2016/2012 R2. Also set
6082 fast_finish, so failed jobs terminate the build immediately. Fixes
6083 bug 29601; bugfix on 0.3.5.4-alpha.
6086 Changes in version 0.3.5.8 - 2019-02-21
6087 Tor 0.3.5.8 backports several fixes from later releases, including fixes
6088 for an annoying SOCKS-parsing bug that affected users in earlier 0.3.5.x
6091 It also includes a fix for a medium-severity security bug affecting Tor
6092 0.3.2.1-alpha and later. All Tor instances running an affected release
6093 should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
6095 o Major bugfixes (cell scheduler, KIST, security):
6096 - Make KIST consider the outbuf length when computing what it can
6097 put in the outbuf. Previously, KIST acted as though the outbuf
6098 were empty, which could lead to the outbuf becoming too full. It
6099 is possible that an attacker could exploit this bug to cause a Tor
6100 client or relay to run out of memory and crash. Fixes bug 29168;
6101 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
6102 TROVE-2019-001 and CVE-2019-8955.
6104 o Major bugfixes (networking, backport from 0.4.0.2-alpha):
6105 - Gracefully handle empty username/password fields in SOCKS5
6106 username/password auth message and allow SOCKS5 handshake to
6107 continue. Previously, we had rejected these handshakes, breaking
6108 certain applications. Fixes bug 29175; bugfix on 0.3.5.1-alpha.
6110 o Minor features (compilation, backport from 0.4.0.2-alpha):
6111 - Compile correctly when OpenSSL is built with engine support
6112 disabled, or with deprecated APIs disabled. Closes ticket 29026.
6113 Patches from "Mangix".
6115 o Minor features (geoip):
6116 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
6117 Country database. Closes ticket 29478.
6119 o Minor features (testing, backport from 0.4.0.2-alpha):
6120 - Treat all unexpected ERR and BUG messages as test failures. Closes
6123 o Minor bugfixes (onion service v3, client, backport from 0.4.0.1-alpha):
6124 - Stop logging a "BUG()" warning and stacktrace when we find a SOCKS
6125 connection waiting for a descriptor that we actually have in the
6126 cache. It turns out that this can actually happen, though it is
6127 rare. Now, tor will recover and retry the descriptor. Fixes bug
6128 28669; bugfix on 0.3.2.4-alpha.
6130 o Minor bugfixes (IPv6, backport from 0.4.0.1-alpha):
6131 - Fix tor_ersatz_socketpair on IPv6-only systems. Previously, the
6132 IPv6 socket was bound using an address family of AF_INET instead
6133 of AF_INET6. Fixes bug 28995; bugfix on 0.3.5.1-alpha. Patch from
6136 o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha):
6137 - Update Cargo.lock file to match the version made by the latest
6138 version of Rust, so that "make distcheck" will pass again. Fixes
6139 bug 29244; bugfix on 0.3.3.4-alpha.
6141 o Minor bugfixes (client, clock skew, backport from 0.4.0.1-alpha):
6142 - Select guards even if the consensus has expired, as long as the
6143 consensus is still reasonably live. Fixes bug 24661; bugfix
6146 o Minor bugfixes (compilation, backport from 0.4.0.1-alpha):
6147 - Compile correctly on OpenBSD; previously, we were missing some
6148 headers required in order to detect it properly. Fixes bug 28938;
6149 bugfix on 0.3.5.1-alpha. Patch from Kris Katterjohn.
6151 o Minor bugfixes (documentation, backport from 0.4.0.2-alpha):
6152 - Describe the contents of the v3 onion service client authorization
6153 files correctly: They hold public keys, not private keys. Fixes
6154 bug 28979; bugfix on 0.3.5.1-alpha. Spotted by "Felixix".
6156 o Minor bugfixes (logging, backport from 0.4.0.1-alpha):
6157 - Rework rep_hist_log_link_protocol_counts() to iterate through all
6158 link protocol versions when logging incoming/outgoing connection
6159 counts. Tor no longer skips version 5, and we won't have to
6160 remember to update this function when new link protocol version is
6161 developed. Fixes bug 28920; bugfix on 0.2.6.10.
6163 o Minor bugfixes (logging, backport from 0.4.0.2-alpha):
6164 - Log more information at "warning" level when unable to read a
6165 private key; log more information at "info" level when unable to
6166 read a public key. We had warnings here before, but they were lost
6167 during our NSS work. Fixes bug 29042; bugfix on 0.3.5.1-alpha.
6169 o Minor bugfixes (misc, backport from 0.4.0.2-alpha):
6170 - The amount of total available physical memory is now determined
6171 using the sysctl identifier HW_PHYSMEM (rather than HW_USERMEM)
6172 when it is defined and a 64-bit variant is not available. Fixes
6173 bug 28981; bugfix on 0.2.5.4-alpha. Patch from Kris Katterjohn.
6175 o Minor bugfixes (onion services, backport from 0.4.0.2-alpha):
6176 - Avoid crashing if ClientOnionAuthDir (incorrectly) contains more
6177 than one private key for a hidden service. Fixes bug 29040; bugfix
6179 - In hs_cache_store_as_client() log an HSDesc we failed to parse at
6180 "debug" level. Tor used to log it as a warning, which caused very
6181 long log lines to appear for some users. Fixes bug 29135; bugfix
6183 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
6184 as a warning. Instead, log it as a protocol warning, because there
6185 is nothing that relay operators can do to fix it. Fixes bug 29029;
6186 bugfix on 0.2.5.7-rc.
6188 o Minor bugfixes (tests, directory clients, backport from 0.4.0.1-alpha):
6189 - Mark outdated dirservers when Tor only has a reasonably live
6190 consensus. Fixes bug 28569; bugfix on 0.3.2.5-alpha.
6192 o Minor bugfixes (tests, backport from 0.4.0.2-alpha):
6193 - Detect and suppress "bug" warnings from the util/time test on
6194 Windows. Fixes bug 29161; bugfix on 0.2.9.3-alpha.
6195 - Do not log an error-level message if we fail to find an IPv6
6196 network interface from the unit tests. Fixes bug 29160; bugfix
6199 o Minor bugfixes (usability, backport from 0.4.0.1-alpha):
6200 - Stop saying "Your Guard ..." in pathbias_measure_{use,close}_rate().
6201 Some users took this phrasing to mean that the mentioned guard was
6202 under their control or responsibility, which it is not. Fixes bug
6203 28895; bugfix on Tor 0.3.0.1-alpha.
6206 Changes in version 0.3.4.11 - 2019-02-21
6207 Tor 0.3.4.11 is the third stable release in its series. It includes
6208 a fix for a medium-severity security bug affecting Tor 0.3.2.1-alpha and
6209 later. All Tor instances running an affected release should upgrade to
6210 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
6212 o Major bugfixes (cell scheduler, KIST, security):
6213 - Make KIST consider the outbuf length when computing what it can
6214 put in the outbuf. Previously, KIST acted as though the outbuf
6215 were empty, which could lead to the outbuf becoming too full. It
6216 is possible that an attacker could exploit this bug to cause a Tor
6217 client or relay to run out of memory and crash. Fixes bug 29168;
6218 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
6219 TROVE-2019-001 and CVE-2019-8955.
6221 o Minor features (geoip):
6222 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
6223 Country database. Closes ticket 29478.
6225 o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha):
6226 - Update Cargo.lock file to match the version made by the latest
6227 version of Rust, so that "make distcheck" will pass again. Fixes
6228 bug 29244; bugfix on 0.3.3.4-alpha.
6230 o Minor bugfixes (onion services, backport from 0.4.0.2-alpha):
6231 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
6232 as a warning. Instead, log it as a protocol warning, because there
6233 is nothing that relay operators can do to fix it. Fixes bug 29029;
6234 bugfix on 0.2.5.7-rc.
6237 Changes in version 0.3.3.12 - 2019-02-21
6238 Tor 0.3.3.12 fixes a medium-severity security bug affecting Tor
6239 0.3.2.1-alpha and later. All Tor instances running an affected release
6240 should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
6242 This release marks the end of support for the Tor 0.3.3.x series. We
6243 recommend that users switch to either the Tor 0.3.4 series (supported
6244 until at least 10 June 2019), or the Tor 0.3.5 series, which will
6245 receive long-term support until at least 1 Feb 2022.
6247 o Major bugfixes (cell scheduler, KIST, security):
6248 - Make KIST consider the outbuf length when computing what it can
6249 put in the outbuf. Previously, KIST acted as though the outbuf
6250 were empty, which could lead to the outbuf becoming too full. It
6251 is possible that an attacker could exploit this bug to cause a Tor
6252 client or relay to run out of memory and crash. Fixes bug 29168;
6253 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
6254 TROVE-2019-001 and CVE-2019-8955.
6256 o Minor features (geoip):
6257 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
6258 Country database. Closes ticket 29478.
6260 o Minor bugfixes (build, compatibility, rust, backport from 0.4.0.2-alpha):
6261 - Update Cargo.lock file to match the version made by the latest
6262 version of Rust, so that "make distcheck" will pass again. Fixes
6263 bug 29244; bugfix on 0.3.3.4-alpha.
6265 o Minor bugfixes (onion services, backport from 0.4.0.2-alpha):
6266 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
6267 as a warning. Instead, log it as a protocol warning, because there
6268 is nothing that relay operators can do to fix it. Fixes bug 29029;
6269 bugfix on 0.2.5.7-rc.
6272 Changes in version 0.4.0.2-alpha - 2019-02-21
6273 Tor 0.4.0.2-alpha is the second alpha in its series; it fixes several
6274 bugs from earlier versions, including several that had broken
6275 backward compatibility.
6277 It also includes a fix for a medium-severity security bug affecting Tor
6278 0.3.2.1-alpha and later. All Tor instances running an affected release
6279 should upgrade to 0.3.3.12, 0.3.4.11, 0.3.5.8, or 0.4.0.2-alpha.
6281 o Major bugfixes (cell scheduler, KIST, security):
6282 - Make KIST consider the outbuf length when computing what it can
6283 put in the outbuf. Previously, KIST acted as though the outbuf
6284 were empty, which could lead to the outbuf becoming too full. It
6285 is possible that an attacker could exploit this bug to cause a Tor
6286 client or relay to run out of memory and crash. Fixes bug 29168;
6287 bugfix on 0.3.2.1-alpha. This issue is also being tracked as
6288 TROVE-2019-001 and CVE-2019-8955.
6290 o Major bugfixes (networking):
6291 - Gracefully handle empty username/password fields in SOCKS5
6292 username/password auth messsage and allow SOCKS5 handshake to
6293 continue. Previously, we had rejected these handshakes, breaking
6294 certain applications. Fixes bug 29175; bugfix on 0.3.5.1-alpha.
6296 o Major bugfixes (windows, startup):
6297 - When reading a consensus file from disk, detect whether it was
6298 written in text mode, and re-read it in text mode if so. Always
6299 write consensus files in binary mode so that we can map them into
6300 memory later. Previously, we had written in text mode, which
6301 confused us when we tried to map the file on windows. Fixes bug
6302 28614; bugfix on 0.4.0.1-alpha.
6304 o Minor features (compilation):
6305 - Compile correctly when OpenSSL is built with engine support
6306 disabled, or with deprecated APIs disabled. Closes ticket 29026.
6307 Patches from "Mangix".
6309 o Minor features (developer tooling):
6310 - Check that bugfix versions in changes files look like Tor versions
6311 from the versions spec. Warn when bugfixes claim to be on a future
6312 release. Closes ticket 27761.
6313 - Provide a git pre-commit hook that disallows committing if we have
6314 any failures in our code and changelog formatting checks. It is
6315 now available in scripts/maint/pre-commit.git-hook. Implements
6318 o Minor features (directory authority):
6319 - When a directory authority is using a bandwidth file to obtain
6320 bandwidth values, include the digest of that file in the vote.
6321 Closes ticket 26698.
6323 o Minor features (geoip):
6324 - Update geoip and geoip6 to the February 5 2019 Maxmind GeoLite2
6325 Country database. Closes ticket 29478.
6327 o Minor features (testing):
6328 - Treat all unexpected ERR and BUG messages as test failures. Closes
6331 o Minor bugfixes (build, compatibility, rust):
6332 - Update Cargo.lock file to match the version made by the latest
6333 version of Rust, so that "make distcheck" will pass again. Fixes
6334 bug 29244; bugfix on 0.3.3.4-alpha.
6336 o Minor bugfixes (compilation):
6337 - Fix compilation warnings in test_circuitpadding.c. Fixes bug
6338 29169; bugfix on 0.4.0.1-alpha.
6339 - Silence a compiler warning in test-memwipe.c on OpenBSD. Fixes bug
6340 29145; bugfix on 0.2.9.3-alpha. Patch from Kris Katterjohn.
6342 o Minor bugfixes (documentation):
6343 - Describe the contents of the v3 onion service client authorization
6344 files correctly: They hold public keys, not private keys. Fixes
6345 bug 28979; bugfix on 0.3.5.1-alpha. Spotted by "Felixix".
6347 o Minor bugfixes (linux seccomp sandbox):
6348 - Fix startup crash when experimental sandbox support is enabled.
6349 Fixes bug 29150; bugfix on 0.4.0.1-alpha. Patch by Peter Gerber.
6351 o Minor bugfixes (logging):
6352 - Avoid logging that we are relaxing a circuit timeout when that
6353 timeout is fixed. Fixes bug 28698; bugfix on 0.2.4.7-alpha.
6354 - Log more information at "warning" level when unable to read a
6355 private key; log more information at "info" level when unable to
6356 read a public key. We had warnings here before, but they were lost
6357 during our NSS work. Fixes bug 29042; bugfix on 0.3.5.1-alpha.
6359 o Minor bugfixes (misc):
6360 - The amount of total available physical memory is now determined
6361 using the sysctl identifier HW_PHYSMEM (rather than HW_USERMEM)
6362 when it is defined and a 64-bit variant is not available. Fixes
6363 bug 28981; bugfix on 0.2.5.4-alpha. Patch from Kris Katterjohn.
6365 o Minor bugfixes (onion services):
6366 - Avoid crashing if ClientOnionAuthDir (incorrectly) contains more
6367 than one private key for a hidden service. Fixes bug 29040; bugfix
6369 - In hs_cache_store_as_client() log an HSDesc we failed to parse at
6370 "debug" level. Tor used to log it as a warning, which caused very
6371 long log lines to appear for some users. Fixes bug 29135; bugfix
6373 - Stop logging "Tried to establish rendezvous on non-OR circuit..."
6374 as a warning. Instead, log it as a protocol warning, because there
6375 is nothing that relay operators can do to fix it. Fixes bug 29029;
6376 bugfix on 0.2.5.7-rc.
6378 o Minor bugfixes (scheduler):
6379 - When re-adding channels to the pending list, check the correct
6380 channel's sched_heap_idx. This issue has had no effect in mainline
6381 Tor, but could have led to bugs down the road in improved versions
6382 of our circuit scheduling code. Fixes bug 29508; bugfix
6385 o Minor bugfixes (tests):
6386 - Fix intermittent failures on an adaptive padding test. Fixes one
6387 case of bug 29122; bugfix on 0.4.0.1-alpha.
6388 - Disable an unstable circuit-padding test that was failing
6389 intermittently because of an ill-defined small histogram. Such
6390 histograms will be allowed again after 29298 is implemented. Fixes
6391 a second case of bug 29122; bugfix on 0.4.0.1-alpha.
6392 - Detect and suppress "bug" warnings from the util/time test on
6393 Windows. Fixes bug 29161; bugfix on 0.2.9.3-alpha.
6394 - Do not log an error-level message if we fail to find an IPv6
6395 network interface from the unit tests. Fixes bug 29160; bugfix
6399 - In the manpage entry describing MapAddress torrc setting, use
6400 example IP addresses from ranges specified for use in documentation
6401 by RFC 5737. Resolves issue 28623.
6404 - Remove the old check-tor script. Resolves issue 29072.
6407 Changes in version 0.4.0.1-alpha - 2019-01-18
6408 Tor 0.4.0.1-alpha is the first release in the new 0.4.0.x series. It
6409 introduces improved features for power and bandwidth conservation,
6410 more accurate reporting of bootstrap progress for user interfaces, and
6411 an experimental backend for an exciting new adaptive padding feature.
6412 There is also the usual assortment of bugfixes and minor features, all
6415 o Major features (battery management, client, dormant mode):
6416 - When Tor is running as a client, and it is unused for a long time,
6417 it can now enter a "dormant" state. When Tor is dormant, it avoids
6418 network and CPU activity until it is reawoken either by a user
6419 request or by a controller command. For more information, see the
6420 configuration options starting with "Dormant". Implements tickets
6422 - The client's memory of whether it is "dormant", and how long it
6423 has spent idle, persists across invocations. Implements
6425 - There is a DormantOnFirstStartup option that integrators can use
6426 if they expect that in many cases, Tor will be installed but
6429 o Major features (bootstrap reporting):
6430 - When reporting bootstrap progress, report the first connection
6431 uniformly, regardless of whether it's a connection for building
6432 application circuits. This allows finer-grained reporting of early
6433 progress than previously possible, with the improvements of ticket
6434 27169. Closes tickets 27167 and 27103. Addresses ticket 27308.
6435 - When reporting bootstrap progress, treat connecting to a proxy or
6436 pluggable transport as separate from having successfully used that
6437 proxy or pluggable transport to connect to a relay. Closes tickets
6440 o Major features (circuit padding):
6441 - Implement preliminary support for the circuit padding portion of
6442 Proposal 254. The implementation supports Adaptive Padding (aka
6443 WTF-PAD) state machines for use between experimental clients and
6444 relays. Support is also provided for APE-style state machines that
6445 use probability distributions instead of histograms to specify
6446 inter-packet delay. At the moment, Tor does not provide any
6447 padding state machines that are used in normal operation: for now,
6448 this feature exists solely for experimentation. Closes
6451 o Major features (refactoring):
6452 - Tor now uses an explicit list of its own subsystems when
6453 initializing and shutting down. Previously, these systems were
6454 managed implicitly in various places throughout the codebase.
6455 (There may still be some subsystems using the old system.) Closes
6458 o Minor features (bootstrap reporting):
6459 - When reporting bootstrap progress, stop distinguishing between
6460 situations where only internal paths are available and situations
6461 where external paths are available. Previously, Tor would often
6462 erroneously report that it had only internal paths. Closes
6465 o Minor features (continuous integration):
6466 - Log Python version during each Travis CI job. Resolves
6469 o Minor features (controller):
6470 - Add a DROPOWNERSHIP command to undo the effects of TAKEOWNERSHIP.
6471 Implements ticket 28843.
6473 o Minor features (developer tooling):
6474 - Provide a git hook script to prevent "fixup!" and "squash!"
6475 commits from ending up in the master branch, as scripts/main/pre-
6476 push.git-hook. Closes ticket 27993.
6478 o Minor features (directory authority):
6479 - Directory authorities support a new consensus algorithm, under
6480 which the family lines in microdescriptors are encoded in a
6481 canonical form. This change makes family lines more compressible
6482 in transit, and on the client. Closes ticket 28266; implements
6485 o Minor features (directory authority, relay):
6486 - Authorities now vote on a "StaleDesc" flag to indicate that a
6487 relay's descriptor is so old that the relay should upload again
6488 soon. Relays treat this flag as a signal to upload a new
6489 descriptor. This flag will eventually let us remove the
6490 'published' date from routerstatus entries, and make our consensus
6491 diffs much smaller. Closes ticket 26770; implements proposal 293.
6493 o Minor features (fallback directory mirrors):
6494 - Update the fallback whitelist based on operator opt-ins and opt-
6495 outs. Closes ticket 24805, patch by Phoul.
6497 o Minor features (FreeBSD):
6498 - On FreeBSD-based systems, warn relay operators if the
6499 "net.inet.ip.random_id" sysctl (IP ID randomization) is disabled.
6500 Closes ticket 28518.
6502 o Minor features (HTTP standards compliance):
6503 - Stop sending the header "Content-type: application/octet-stream"
6504 along with transparently compressed documents: this confused
6505 browsers. Closes ticket 28100.
6507 o Minor features (IPv6):
6508 - We add an option ClientAutoIPv6ORPort, to make clients randomly
6509 prefer a node's IPv4 or IPv6 ORPort. The random preference is set
6510 every time a node is loaded from a new consensus or bridge config.
6511 We expect that this option will enable clients to bootstrap more
6512 quickly without having to determine whether they support IPv4,
6513 IPv6, or both. Closes ticket 27490. Patch by Neel Chauhan.
6514 - When using addrs_in_same_network_family(), avoid choosing circuit
6515 paths that pass through the same IPv6 subnet more than once.
6516 Previously, we only checked IPv4 subnets. Closes ticket 24393.
6517 Patch by Neel Chauhan.
6519 o Minor features (log messages):
6520 - Improve log message in v3 onion services that could print out
6521 negative revision counters. Closes ticket 27707. Patch
6524 o Minor features (memory usage):
6525 - Save memory by storing microdescriptor family lists with a more
6526 compact representation. Closes ticket 27359.
6527 - Tor clients now use mmap() to read consensus files from disk, so
6528 that they no longer need keep the full text of a consensus in
6529 memory when parsing it or applying a diff. Closes ticket 27244.
6531 o Minor features (parsing):
6532 - Directory authorities now validate that router descriptors and
6533 ExtraInfo documents are in a valid subset of UTF-8, and reject
6534 them if they are not. Closes ticket 27367.
6536 o Minor features (performance):
6537 - Cache the results of summarize_protocol_flags(), so that we don't
6538 have to parse the same protocol-versions string over and over.
6539 This should save us a huge number of malloc calls on startup, and
6540 may reduce memory fragmentation with some allocators. Closes
6542 - Remove a needless memset() call from get_token_arguments, thereby
6543 speeding up the tokenization of directory objects by about 20%.
6544 Closes ticket 28852.
6545 - Replace parse_short_policy() with a faster implementation, to
6546 improve microdescriptor parsing time. Closes ticket 28853.
6547 - Speed up directory parsing a little by avoiding use of the non-
6548 inlined strcmp_len() function. Closes ticket 28856.
6549 - Speed up microdescriptor parsing by about 30%, to help improve
6550 startup time. Closes ticket 28839.
6552 o Minor features (pluggable transports):
6553 - Add support for emitting STATUS updates to Tor's control port from
6554 a pluggable transport process. Closes ticket 28846.
6555 - Add support for logging to Tor's logging subsystem from a
6556 pluggable transport process. Closes ticket 28180.
6558 o Minor features (process management):
6559 - Add a new process API for handling child processes. This new API
6560 allows Tor to have bi-directional communication with child
6561 processes on both Unix and Windows. Closes ticket 28179.
6562 - Use the subsystem manager to initialize and shut down the process
6563 module. Closes ticket 28847.
6565 o Minor features (relay):
6566 - When listing relay families, list them in canonical form including
6567 the relay's own identity, and try to give a more useful set of
6568 warnings. Part of ticket 28266 and proposal 298.
6570 o Minor features (required protocols):
6571 - Before exiting because of a missing required protocol, Tor will
6572 now check the publication time of the consensus, and not exit
6573 unless the consensus is newer than the Tor program's own release
6574 date. Previously, Tor would not check the consensus publication
6575 time, and so might exit because of a missing protocol that might
6576 no longer be required in a current consensus. Implements proposal
6577 297; closes ticket 27735.
6579 o Minor features (testing):
6580 - Allow a HeartbeatPeriod of less than 30 minutes in testing Tor
6581 networks. Closes ticket 28840. Patch by Rob Jansen.
6583 o Minor bugfixes (client, clock skew):
6584 - Bootstrap successfully even when Tor's clock is behind the clocks
6585 on the authorities. Fixes bug 28591; bugfix on 0.2.0.9-alpha.
6586 - Select guards even if the consensus has expired, as long as the
6587 consensus is still reasonably live. Fixes bug 24661; bugfix
6590 o Minor bugfixes (compilation):
6591 - Compile correctly on OpenBSD; previously, we were missing some
6592 headers required in order to detect it properly. Fixes bug 28938;
6593 bugfix on 0.3.5.1-alpha. Patch from Kris Katterjohn.
6595 o Minor bugfixes (directory clients):
6596 - Mark outdated dirservers when Tor only has a reasonably live
6597 consensus. Fixes bug 28569; bugfix on 0.3.2.5-alpha.
6599 o Minor bugfixes (directory mirrors):
6600 - Even when a directory mirror's clock is behind the clocks on the
6601 authorities, we now allow the mirror to serve "future"
6602 consensuses. Fixes bug 28654; bugfix on 0.3.0.1-alpha.
6604 o Minor bugfixes (DNS):
6605 - Gracefully handle an empty or absent resolve.conf file by falling
6606 back to using "localhost" as a DNS server (and hoping it works).
6607 Previously, we would just stop running as an exit. Fixes bug
6608 21900; bugfix on 0.2.1.10-alpha.
6610 o Minor bugfixes (guards):
6611 - In count_acceptable_nodes(), the minimum number is now one bridge
6612 or guard node, and two non-guard nodes for a circuit. Previously,
6613 we had added up the sum of all nodes with a descriptor, but that
6614 could cause us to build failing circuits when we had either too
6615 many bridges or not enough guard nodes. Fixes bug 25885; bugfix on
6616 0.2.3.1-alpha. Patch by Neel Chauhan.
6618 o Minor bugfixes (IPv6):
6619 - Fix tor_ersatz_socketpair on IPv6-only systems. Previously, the
6620 IPv6 socket was bound using an address family of AF_INET instead
6621 of AF_INET6. Fixes bug 28995; bugfix on 0.3.5.1-alpha. Patch from
6624 o Minor bugfixes (logging):
6625 - Rework rep_hist_log_link_protocol_counts() to iterate through all
6626 link protocol versions when logging incoming/outgoing connection
6627 counts. Tor no longer skips version 5, and we won't have to
6628 remember to update this function when new link protocol version is
6629 developed. Fixes bug 28920; bugfix on 0.2.6.10.
6631 o Minor bugfixes (networking):
6632 - Introduce additional checks into tor_addr_parse() to reject
6633 certain incorrect inputs that previously were not detected. Fixes
6634 bug 23082; bugfix on 0.2.0.10-alpha.
6636 o Minor bugfixes (onion service v3, client):
6637 - Stop logging a "BUG()" warning and stacktrace when we find a SOCKS
6638 connection waiting for a descriptor that we actually have in the
6639 cache. It turns out that this can actually happen, though it is
6640 rare. Now, tor will recover and retry the descriptor. Fixes bug
6641 28669; bugfix on 0.3.2.4-alpha.
6643 o Minor bugfixes (periodic events):
6644 - Refrain from calling routerlist_remove_old_routers() from
6645 check_descriptor_callback(). Instead, create a new hourly periodic
6646 event. Fixes bug 27929; bugfix on 0.2.8.1-alpha.
6648 o Minor bugfixes (pluggable transports):
6649 - Make sure that data is continously read from standard output and
6650 standard error pipes of a pluggable transport child-process, to
6651 avoid deadlocking when a pipe's buffer is full. Fixes bug 26360;
6652 bugfix on 0.2.3.6-alpha.
6654 o Minor bugfixes (unit tests):
6655 - Instead of relying on hs_free_all() to clean up all onion service
6656 objects in test_build_descriptors(), we now deallocate them one by
6657 one. This lets Coverity know that we are not leaking memory there
6658 and fixes CID 1442277. Fixes bug 28989; bugfix on 0.3.5.1-alpha.
6660 o Minor bugfixes (usability):
6661 - Stop saying "Your Guard ..." in pathbias_measure_{use,close}_rate().
6662 Some users took this phrasing to mean that the mentioned guard was
6663 under their control or responsibility, which it is not. Fixes bug
6664 28895; bugfix on Tor 0.3.0.1-alpha.
6666 o Code simplification and refactoring:
6667 - Reimplement NETINFO cell parsing and generation to rely on
6668 trunnel-generated wire format handling code. Closes ticket 27325.
6669 - Remove unnecessary unsafe code from the Rust macro "cstr!". Closes
6671 - Rework SOCKS wire format handling to rely on trunnel-generated
6672 parsing/generation code. Resolves ticket 27620.
6673 - Split out bootstrap progress reporting from control.c into a
6674 separate file. Part of ticket 27402.
6675 - The .may_include files that we use to describe our directory-by-
6676 directory dependency structure now describe a noncircular
6677 dependency graph over the directories that they cover. Our
6678 checkIncludes.py tool now enforces this noncircularity. Closes
6682 - Mention that you cannot add a new onion service if Tor is already
6683 running with Sandbox enabled. Closes ticket 28560.
6684 - Improve ControlPort documentation. Mention that it accepts
6685 address:port pairs, and can be used multiple times. Closes
6687 - Document the exact output of "tor --version". Closes ticket 28889.
6690 - Stop responding to the 'GETINFO status/version/num-concurring' and
6691 'GETINFO status/version/num-versioning' control port commands, as
6692 those were deprecated back in 0.2.0.30. Also stop listing them in
6693 output of 'GETINFO info/names'. Resolves ticket 28757.
6694 - The scripts used to generate and maintain the list of fallback
6695 directories have been extracted into a new "fallback-scripts"
6696 repository. Closes ticket 27914.
6699 - Run shellcheck for scripts in the in scripts/ directory. Closes
6701 - Add unit tests for tokenize_string() and get_next_token()
6702 functions. Resolves ticket 27625.
6704 o Code simplification and refactoring (onion service v3):
6705 - Consolidate the authorized client descriptor cookie computation
6706 code from client and service into one function. Closes
6709 o Code simplification and refactoring (shell scripts):
6710 - Cleanup scan-build.sh to silence shellcheck warnings. Closes
6712 - Fix issues that shellcheck found in chutney-git-bisect.sh.
6713 Resolves ticket 28006.
6714 - Fix issues that shellcheck found in updateRustDependencies.sh.
6715 Resolves ticket 28012.
6716 - Fix shellcheck warnings in cov-diff script. Resolves issue 28009.
6717 - Fix shellcheck warnings in run_calltool.sh. Resolves ticket 28011.
6718 - Fix shellcheck warnings in run_trunnel.sh. Resolves issue 28010.
6719 - Fix shellcheck warnings in scripts/test/coverage. Resolves
6723 Changes in version 0.3.3.11 - 2019-01-07
6724 Tor 0.3.3.11 backports numerous fixes from later versions of Tor.
6725 numerous fixes, including an important fix for anyone using OpenSSL
6726 1.1.1. Anyone running an earlier version of Tor 0.3.3 should upgrade
6727 to this version, or to a later series.
6729 As a reminder, support the Tor 0.3.3 series will end on 22 Feb 2019.
6730 We anticipate that this will be the last release of Tor 0.3.3, unless
6731 some major bug is before then. Some time between now and then, users
6732 should switch to either the Tor 0.3.4 series (supported until at least
6733 10 June 2019), or the Tor 0.3.5 series, which will receive long-term
6734 support until at least 1 Feb 2022.
6736 o Major bugfixes (OpenSSL, portability, backport from 0.3.5.5-alpha):
6737 - Fix our usage of named groups when running as a TLS 1.3 client in
6738 OpenSSL 1.1.1. Previously, we only initialized EC groups when
6739 running as a relay, which caused clients to fail to negotiate TLS
6740 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3
6743 o Major bugfixes (restart-in-process, backport from 0.3.5.1-alpha):
6744 - Fix a use-after-free error that could be caused by passing Tor an
6745 impossible set of options that would fail during options_act().
6746 Fixes bug 27708; bugfix on 0.3.3.1-alpha.
6748 o Minor features (continuous integration, backport from 0.3.5.1-alpha):
6749 - Only run one online rust build in Travis, to reduce network
6750 errors. Skip offline rust builds on Travis for Linux gcc, because
6751 they're redundant. Implements ticket 27252.
6752 - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a
6753 duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on
6754 Linux with default settings, because all the non-default builds
6755 use gcc on Linux. Implements ticket 27252.
6757 o Minor features (continuous integration, backport from 0.3.5.3-alpha):
6758 - Use the Travis Homebrew addon to install packages on macOS during
6759 Travis CI. The package list is the same, but the Homebrew addon
6760 does not do a `brew update` by default. Implements ticket 27738.
6762 o Minor features (fallback directory list, backport from 0.3.5.6-rc):
6763 - Replace the 150 fallbacks originally introduced in Tor
6764 0.3.3.1-alpha in January 2018 (of which ~115 were still
6765 functional), with a list of 157 fallbacks (92 new, 65 existing, 85
6766 removed) generated in December 2018. Closes ticket 24803.
6768 o Minor features (geoip):
6769 - Update geoip and geoip6 to the January 3 2019 Maxmind GeoLite2
6770 Country database. Closes ticket 29012.
6772 o Minor features (OpenSSL bug workaround, backport from 0.3.5.7):
6773 - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3
6774 key export function from handling long labels. When this bug is
6775 detected, Tor will disable TLS 1.3. We recommend upgrading to a
6776 version of OpenSSL without this bug when it becomes available.
6777 Closes ticket 28973.
6779 o Minor bugfixes (relay statistics, backport from 0.3.5.7):
6780 - Update relay descriptor on bandwidth changes only when the uptime
6781 is smaller than 24h, in order to reduce the efficiency of guard
6782 discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha.
6784 o Minor bugfixes (C correctness, backport from 0.3.5.4-alpha):
6785 - Avoid undefined behavior in an end-of-string check when parsing
6786 the BEGIN line in a directory object. Fixes bug 28202; bugfix
6789 o Minor bugfixes (code safety, backport from 0.3.5.3-alpha):
6790 - Rewrite our assertion macros so that they no longer suppress the
6791 compiler's -Wparentheses warnings. Fixes bug 27709; bugfix
6793 o Minor bugfixes (compilation, backport from 0.3.5.5-alpha):
6794 - Initialize a variable unconditionally in aes_new_cipher(), since
6795 some compilers cannot tell that we always initialize it before
6796 use. Fixes bug 28413; bugfix on 0.2.9.3-alpha.
6798 o Minor bugfixes (directory authority, backport from 0.3.5.4-alpha):
6799 - Log additional info when we get a relay that shares an ed25519 ID
6800 with a different relay, instead making a BUG() warning. Fixes bug
6801 27800; bugfix on 0.3.2.1-alpha.
6803 o Minor bugfixes (directory permissions, backport form 0.3.5.3-alpha):
6804 - When a user requests a group-readable DataDirectory, give it to
6805 them. Previously, when the DataDirectory and the CacheDirectory
6806 were the same, the default setting (0) for
6807 CacheDirectoryGroupReadable would override the setting for
6808 DataDirectoryGroupReadable. Fixes bug 26913; bugfix
6811 o Minor bugfixes (onion service v3, backport from 0.3.5.1-alpha):
6812 - When the onion service directory can't be created or has the wrong
6813 permissions, do not log a stack trace. Fixes bug 27335; bugfix
6816 o Minor bugfixes (onion service v3, backport from 0.3.5.2-alpha):
6817 - Close all SOCKS request (for the same .onion) if the newly fetched
6818 descriptor is unusable. Before that, we would close only the first
6819 one leaving the other hanging and let to time out by themselves.
6820 Fixes bug 27410; bugfix on 0.3.2.1-alpha.
6822 o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha):
6823 - Don't warn so loudly when Tor is unable to decode an onion
6824 descriptor. This can now happen as a normal use case if a client
6825 gets a descriptor with client authorization but the client is not
6826 authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha.
6828 o Minor bugfixes (onion service v3, backport from 0.3.5.6-rc):
6829 - When deleting an ephemeral onion service (DEL_ONION), do not close
6830 any rendezvous circuits in order to let the existing client
6831 connections finish by themselves or closed by the application. The
6832 HS v2 is doing that already so now we have the same behavior for
6833 all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha.
6835 o Minor bugfixes (HTTP tunnel):
6836 - Fix a bug warning when closing an HTTP tunnel connection due to
6837 an HTTP request we couldn't handle. Fixes bug 26470; bugfix on
6840 o Minor bugfixes (memory leaks, backport from 0.3.5.5-alpha):
6841 - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419;
6842 bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger.
6844 o Minor bugfixes (netflow padding, backport from 0.3.5.1-alpha):
6845 - Ensure circuitmux queues are empty before scheduling or sending
6846 padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha.
6848 o Minor bugfixes (protover, backport from 0.3.5.3-alpha):
6849 - Reject protocol names containing bytes other than alphanumeric
6850 characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix
6853 o Minor bugfixes (rust, backport from 0.3.5.1-alpha):
6854 - Compute protover votes correctly in the rust version of the
6855 protover code. Previously, the protover rewrite in 24031 allowed
6856 repeated votes from the same voter for the same protocol version
6857 to be counted multiple times in protover_compute_vote(). Fixes bug
6858 27649; bugfix on 0.3.3.5-rc.
6859 - Reject protover names that contain invalid characters. Fixes bug
6860 27687; bugfix on 0.3.3.1-alpha.
6862 o Minor bugfixes (rust, backport from 0.3.5.2-alpha):
6863 - protover_all_supported() would attempt to allocate up to 16GB on
6864 some inputs, leading to a potential memory DoS. Fixes bug 27206;
6865 bugfix on 0.3.3.5-rc.
6867 o Minor bugfixes (rust, backport from 0.3.5.4-alpha):
6868 - Fix a potential null dereference in protover_all_supported(). Add
6869 a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha.
6870 - Return a string that can be safely freed by C code, not one
6871 created by the rust allocator, in protover_all_supported(). Fixes
6872 bug 27740; bugfix on 0.3.3.1-alpha.
6873 - Fix an API mismatch in the rust implementation of
6874 protover_compute_vote(). This bug could have caused crashes on any
6875 directory authorities running Tor with Rust (which we do not yet
6876 recommend). Fixes bug 27741; bugfix on 0.3.3.6.
6878 o Minor bugfixes (testing, backport from 0.3.5.1-alpha):
6879 - If a unit test running in a subprocess exits abnormally or with a
6880 nonzero status code, treat the test as having failed, even if the
6881 test reported success. Without this fix, memory leaks don't cause
6882 the tests to fail, even with LeakSanitizer. Fixes bug 27658;
6883 bugfix on 0.2.2.4-alpha.
6885 o Minor bugfixes (testing, backport from 0.3.5.4-alpha):
6886 - Treat backtrace test failures as expected on BSD-derived systems
6887 (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808.
6888 (FreeBSD failures have been treated as expected since 18204 in
6889 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha.
6891 o Minor bugfixes (unit tests, guard selection, backport from 0.3.5.6-rc):
6892 - Stop leaking memory in an entry guard unit test. Fixes bug 28554;
6893 bugfix on 0.3.0.1-alpha.
6896 Changes in version 0.3.4.10 - 2019-01-07
6897 Tor 0.3.4.9 is the second stable release in its series; it backports
6898 numerous fixes, including an important fix for relays, and for anyone
6899 using OpenSSL 1.1.1. Anyone running an earlier version of Tor 0.3.4
6902 As a reminder, the Tor 0.3.4 series will be supported until 10 June
6903 2019. Some time between now and then, users should switch to the Tor
6904 0.3.5 series, which will receive long-term support until at least 1
6907 o Major bugfixes (OpenSSL, portability, backport from 0.3.5.5-alpha):
6908 - Fix our usage of named groups when running as a TLS 1.3 client in
6909 OpenSSL 1.1.1. Previously, we only initialized EC groups when
6910 running as a relay, which caused clients to fail to negotiate TLS
6911 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3
6914 o Major bugfixes (relay, directory, backport from 0.3.5.7):
6915 - Always reactivate linked connections in the main loop so long as
6916 any linked connection has been active. Previously, connections
6917 serving directory information wouldn't get reactivated after the
6918 first chunk of data was sent (usually 32KB), which would prevent
6919 clients from bootstrapping. Fixes bug 28912; bugfix on
6920 0.3.4.1-alpha. Patch by "cypherpunks3".
6922 o Minor features (continuous integration, Windows, backport from 0.3.5.6-rc):
6923 - Always show the configure and test logs, and upload them as build
6924 artifacts, when building for Windows using Appveyor CI.
6927 o Minor features (controller, backport from 0.3.5.1-alpha):
6928 - For purposes of CIRC_BW-based dropped cell detection, track half-
6929 closed stream ids, and allow their ENDs, SENDMEs, DATA and path
6930 bias check cells to arrive without counting it as dropped until
6931 either the END arrives, or the windows are empty. Closes
6934 o Minor features (fallback directory list, backport from 0.3.5.6-rc):
6935 - Replace the 150 fallbacks originally introduced in Tor
6936 0.3.3.1-alpha in January 2018 (of which ~115 were still
6937 functional), with a list of 157 fallbacks (92 new, 65 existing, 85
6938 removed) generated in December 2018. Closes ticket 24803.
6940 o Minor features (geoip):
6941 - Update geoip and geoip6 to the November 6 2018 Maxmind GeoLite2
6942 Country database. Closes ticket 28395.
6944 o Minor features (OpenSSL bug workaround, backport from 0.3.5.7):
6945 - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3
6946 key export function from handling long labels. When this bug is
6947 detected, Tor will disable TLS 1.3. We recommend upgrading to a
6948 version of OpenSSL without this bug when it becomes available.
6949 Closes ticket 28973.
6951 o Minor bugfixes (compilation, backport from 0.3.5.5-alpha):
6952 - Initialize a variable unconditionally in aes_new_cipher(), since
6953 some compilers cannot tell that we always initialize it before
6954 use. Fixes bug 28413; bugfix on 0.2.9.3-alpha.
6956 o Minor bugfixes (connection, relay, backport from 0.3.5.5-alpha):
6957 - Avoid a logging a BUG() stacktrace when closing connection held
6958 open because the write side is rate limited but not the read side.
6959 Now, the connection read side is simply shut down until Tor is
6960 able to flush the connection and close it. Fixes bug 27750; bugfix
6963 o Minor bugfixes (continuous integration, Windows, backport from 0.3.5.5-alpha):
6964 - Manually configure the zstd compiler options, when building using
6965 mingw on Appveyor Windows CI. The MSYS2 mingw zstd package does
6966 not come with a pkg-config file. Fixes bug 28454; bugfix
6968 - Stop using an external OpenSSL install, and stop installing MSYS2
6969 packages, when building using mingw on Appveyor Windows CI. Fixes
6970 bug 28399; bugfix on 0.3.4.1-alpha.
6972 o Minor bugfixes (continuous integration, Windows, backport from 0.3.5.6-rc):
6973 - Explicitly specify the path to the OpenSSL library and do not
6974 download OpenSSL from Pacman, but instead use the library that is
6975 already provided by AppVeyor. Fixes bug 28574; bugfix on master.
6977 o Minor bugfixes (directory permissions, backport form 0.3.5.3-alpha):
6978 - When a user requests a group-readable DataDirectory, give it to
6979 them. Previously, when the DataDirectory and the CacheDirectory
6980 were the same, the default setting (0) for
6981 CacheDirectoryGroupReadable would override the setting for
6982 DataDirectoryGroupReadable. Fixes bug 26913; bugfix
6985 o Minor bugfixes (memory leaks, backport from 0.3.5.5-alpha):
6986 - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419;
6987 bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger.
6989 o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha):
6990 - Don't warn so loudly when Tor is unable to decode an onion
6991 descriptor. This can now happen as a normal use case if a client
6992 gets a descriptor with client authorization but the client is not
6993 authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha.
6995 o Minor bugfixes (onion service v3, backport from 0.3.5.6-rc):
6996 - When deleting an ephemeral onion service (DEL_ONION), do not close
6997 any rendezvous circuits in order to let the existing client
6998 connections finish by themselves or closed by the application. The
6999 HS v2 is doing that already so now we have the same behavior for
7000 all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha.
7002 o Minor bugfixes (relay statistics, backport from 0.3.5.7):
7003 - Update relay descriptor on bandwidth changes only when the uptime
7004 is smaller than 24h, in order to reduce the efficiency of guard
7005 discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha.
7007 o Minor bugfixes (unit tests, guard selection, backport from 0.3.5.6-rc):
7008 - Stop leaking memory in an entry guard unit test. Fixes bug 28554;
7009 bugfix on 0.3.0.1-alpha.
7012 Changes in version 0.3.5.7 - 2019-01-07
7013 Tor 0.3.5.7 is the first stable release in its series; it includes
7014 compilation and portability fixes, and a fix for a severe problem
7015 affecting directory caches.
7017 The Tor 0.3.5 series includes several new features and performance
7018 improvements, including client authorization for v3 onion services,
7019 cleanups to bootstrap reporting, support for improved bandwidth-
7020 measurement tools, experimental support for NSS in place of OpenSSL,
7021 and much more. It also begins a full reorganization of Tor's code
7022 layout, for improved modularity and maintainability in the future.
7023 Finally, there is the usual set of performance improvements and
7024 bugfixes that we try to do in every release series.
7026 There are a couple of changes in the 0.3.5 that may affect
7027 compatibility. First, the default version for newly created onion
7028 services is now v3. Use the HiddenServiceVersion option if you want to
7029 override this. Second, some log messages related to bootstrapping have
7030 changed; if you use stem, you may need to update to the latest version
7031 so it will recognize them.
7033 We have designated 0.3.5 as a "long-term support" (LTS) series: we
7034 will continue to patch major bugs in typical configurations of 0.3.5
7035 until at least 1 Feb 2022. (We do not plan to provide long-term
7036 support for embedding, Rust support, NSS support, running a directory
7037 authority, or unsupported platforms. For these, you will need to stick
7038 with the latest stable release.)
7040 Below are the changes since 0.3.5.6-rc. For a complete list of changes
7041 since 0.3.4.9, see the ReleaseNotes file.
7043 o Major bugfixes (relay, directory):
7044 - Always reactivate linked connections in the main loop so long as
7045 any linked connection has been active. Previously, connections
7046 serving directory information wouldn't get reactivated after the
7047 first chunk of data was sent (usually 32KB), which would prevent
7048 clients from bootstrapping. Fixes bug 28912; bugfix on
7049 0.3.4.1-alpha. Patch by "cypherpunks3".
7051 o Minor features (compilation):
7052 - When possible, place our warning flags in a separate file, to
7053 avoid flooding verbose build logs. Closes ticket 28924.
7055 o Minor features (geoip):
7056 - Update geoip and geoip6 to the January 3 2019 Maxmind GeoLite2
7057 Country database. Closes ticket 29012.
7059 o Minor features (OpenSSL bug workaround):
7060 - Work around a bug in OpenSSL 1.1.1a, which prevented the TLS 1.3
7061 key export function from handling long labels. When this bug is
7062 detected, Tor will disable TLS 1.3. We recommend upgrading to a
7063 version of OpenSSL without this bug when it becomes available.
7064 Closes ticket 28973.
7066 o Minor features (performance):
7067 - Remove about 96% of the work from the function that we run at
7068 startup to test our curve25519_basepoint implementation. Since
7069 this function has yet to find an actual failure, we now only run
7070 it for 8 iterations instead of 200. Based on our profile
7071 information, this change should save around 8% of our startup time
7072 on typical desktops, and may have a similar effect on other
7073 platforms. Closes ticket 28838.
7074 - Stop re-validating our hardcoded Diffie-Hellman parameters on
7075 every startup. Doing this wasted time and cycles, especially on
7076 low-powered devices. Closes ticket 28851.
7078 o Minor bugfixes (compilation):
7079 - Fix compilation for Android by adding a missing header to
7080 freespace.c. Fixes bug 28974; bugfix on 0.3.5.1-alpha.
7082 o Minor bugfixes (correctness):
7083 - Fix an unreached code path where we checked the value of
7084 "hostname" inside send_resolved_hostname_cell(). Previously, we
7085 used it before checking it; now we check it first. Fixes bug
7086 28879; bugfix on 0.1.2.7-alpha.
7088 o Minor bugfixes (testing):
7089 - Make sure that test_rebind.py actually obeys its timeout, even
7090 when it receives a large number of log messages. Fixes bug 28883;
7091 bugfix on 0.3.5.4-alpha.
7092 - Stop running stem's unit tests as part of "make test-stem", but
7093 continue to run stem's unit and online tests during "make test-
7094 stem-full". Fixes bug 28568; bugfix on 0.2.6.3-alpha.
7096 o Minor bugfixes (windows services):
7097 - Make Tor start correctly as an NT service again: previously it was
7098 broken by refactoring. Fixes bug 28612; bugfix on 0.3.5.3-alpha.
7100 o Code simplification and refactoring:
7101 - When parsing a port configuration, make it more obvious to static
7102 analyzer tools that we always initialize the address. Closes
7106 Changes in version 0.3.5.6-rc - 2018-12-18
7107 Tor 0.3.5.6-rc fixes numerous small bugs in earlier versions of Tor.
7108 It is the first release candidate in the 0.3.5.x series; if no further
7109 huge bugs are found, our next release may be the stable 0.3.5.x.
7111 o Minor features (continuous integration, Windows):
7112 - Always show the configure and test logs, and upload them as build
7113 artifacts, when building for Windows using Appveyor CI.
7116 o Minor features (fallback directory list):
7117 - Replace the 150 fallbacks originally introduced in Tor
7118 0.3.3.1-alpha in January 2018 (of which ~115 were still
7119 functional), with a list of 157 fallbacks (92 new, 65 existing, 85
7120 removed) generated in December 2018. Closes ticket 24803.
7122 o Minor features (geoip):
7123 - Update geoip and geoip6 to the December 5 2018 Maxmind GeoLite2
7124 Country database. Closes ticket 28744.
7126 o Minor bugfixes (compilation):
7127 - Add missing dependency on libgdi32.dll for tor-print-ed-signing-
7128 cert.exe on Windows. Fixes bug 28485; bugfix on 0.3.5.1-alpha.
7130 o Minor bugfixes (continuous integration, Windows):
7131 - Explicitly specify the path to the OpenSSL library and do not
7132 download OpenSSL from Pacman, but instead use the library that is
7133 already provided by AppVeyor. Fixes bug 28574; bugfix on master.
7135 o Minor bugfixes (onion service v3):
7136 - When deleting an ephemeral onion service (DEL_ONION), do not close
7137 any rendezvous circuits in order to let the existing client
7138 connections finish by themselves or closed by the application. The
7139 HS v2 is doing that already so now we have the same behavior for
7140 all versions. Fixes bug 28619; bugfix on 0.3.3.1-alpha.
7142 o Minor bugfixes (restart-in-process, boostrap):
7143 - Add missing resets of bootstrap tracking state when shutting down
7144 (regression caused by ticket 27169). Fixes bug 28524; bugfix
7147 o Minor bugfixes (testing):
7148 - Use a separate DataDirectory for the test_rebind script.
7149 Previously, this script would run using the default DataDirectory,
7150 and sometimes fail. Fixes bug 28562; bugfix on 0.3.5.1-alpha.
7151 Patch from Taylor R Campbell.
7152 - Stop leaking memory in an entry guard unit test. Fixes bug 28554;
7153 bugfix on 0.3.0.1-alpha.
7155 o Minor bugfixes (Windows):
7156 - Correctly identify Windows 8.1, Windows 10, and Windows Server
7157 2008 and later from their NT versions. Fixes bug 28096; bugfix on
7158 0.2.2.34; reported by Keifer Bly.
7159 - On recent Windows versions, the GetVersionEx() function may report
7160 an earlier Windows version than the running OS. To avoid user
7161 confusion, add "[or later]" to Tor's version string on affected
7162 versions of Windows. Fixes bug 28096; bugfix on 0.2.2.34; reported
7164 - Remove Windows versions that were never supported by the
7165 GetVersionEx() function. Stop duplicating the latest Windows
7166 version in get_uname(). Fixes bug 28096; bugfix on 0.2.2.34;
7167 reported by Keifer Bly.
7170 - Increase logging and tag all log entries with timestamps in
7171 test_rebind.py. Provides diagnostics for issue 28229.
7173 o Code simplification and refactoring (shared random, dirauth):
7174 - Change many tor_assert() to use BUG() instead. The idea is to not
7175 crash a dirauth but rather scream loudly with a stacktrace and let
7176 it continue run. The shared random subsystem is very resilient and
7177 if anything wrong happens with it, at worst a non coherent value
7178 will be put in the vote and discarded by the other authorities.
7179 Closes ticket 19566.
7181 o Documentation (onion services):
7182 - Document in the man page that changing ClientOnionAuthDir value or
7183 adding a new file in the directory will not work at runtime upon
7184 sending a HUP if Sandbox 1. Closes ticket 28128.
7185 - Note in the man page that the only real way to fully revoke an
7186 onion service v3 client authorization is by restarting the tor
7187 process. Closes ticket 28275.
7190 Changes in version 0.3.5.5-alpha - 2018-11-16
7191 Tor 0.3.5.5-alpha includes numerous bugfixes on earlier releases,
7192 including several that we hope to backport to older release series in
7195 o Major bugfixes (OpenSSL, portability):
7196 - Fix our usage of named groups when running as a TLS 1.3 client in
7197 OpenSSL 1.1.1. Previously, we only initialized EC groups when
7198 running as a relay, which caused clients to fail to negotiate TLS
7199 1.3 with relays. Fixes bug 28245; bugfix on 0.2.9.15 (when TLS 1.3
7202 o Minor features (geoip):
7203 - Update geoip and geoip6 to the November 6 2018 Maxmind GeoLite2
7204 Country database. Closes ticket 28395.
7206 o Minor bugfixes (compilation):
7207 - Initialize a variable unconditionally in aes_new_cipher(), since
7208 some compilers cannot tell that we always initialize it before
7209 use. Fixes bug 28413; bugfix on 0.2.9.3-alpha.
7211 o Minor bugfixes (connection, relay):
7212 - Avoid a logging a BUG() stacktrace when closing connection held
7213 open because the write side is rate limited but not the read side.
7214 Now, the connection read side is simply shut down until Tor is
7215 able to flush the connection and close it. Fixes bug 27750; bugfix
7218 o Minor bugfixes (continuous integration, Windows):
7219 - Manually configure the zstd compiler options, when building using
7220 mingw on Appveyor Windows CI. The MSYS2 mingw zstd package does
7221 not come with a pkg-config file. Fixes bug 28454; bugfix
7223 - Stop using an external OpenSSL install, and stop installing MSYS2
7224 packages, when building using mingw on Appveyor Windows CI. Fixes
7225 bug 28399; bugfix on 0.3.4.1-alpha.
7227 o Minor bugfixes (documentation):
7228 - Make Doxygen work again after the code movement in the 0.3.5
7229 source tree. Fixes bug 28435; bugfix on 0.3.5.1-alpha.
7231 o Minor bugfixes (Linux seccomp2 sandbox):
7232 - Permit the "shutdown()" system call, which is apparently used by
7233 OpenSSL under some circumstances. Fixes bug 28183; bugfix
7236 o Minor bugfixes (logging):
7237 - Stop talking about the Named flag in log messages. Clients have
7238 ignored the Named flag since 0.3.2. Fixes bug 28441; bugfix
7241 o Minor bugfixes (memory leaks):
7242 - Fix a harmless memory leak in libtorrunner.a. Fixes bug 28419;
7243 bugfix on 0.3.3.1-alpha. Patch from Martin Kepplinger.
7245 o Minor bugfixes (onion services):
7246 - On an intro point for a version 3 onion service, stop closing
7247 introduction circuits on an NACK. This lets the client decide
7248 whether to reuse the circuit or discard it. Previously, we closed
7249 intro circuits when sending NACKs. Fixes bug 27841; bugfix on
7250 0.3.2.1-alpha. Patch by Neel Chaunan.
7251 - When replacing a descriptor in the client cache, make sure to
7252 close all client introduction circuits for the old descriptor, so
7253 we don't end up with unusable leftover circuits. Fixes bug 27471;
7254 bugfix on 0.3.2.1-alpha.
7257 Changes in version 0.3.5.4-alpha - 2018-11-08
7258 Tor 0.3.5.4-alpha includes numerous bugfixes on earlier versions and
7259 improves our continuous integration support. It continues our attempts
7260 to stabilize this alpha branch and build it into a foundation for an
7261 acceptable long-term-support release.
7263 o Major bugfixes (compilation, rust):
7264 - Rust tests can now build and run successfully with the
7265 --enable-fragile-hardening option enabled. Doing this currently
7266 requires the rust beta channel; it will be possible with stable
7267 rust once Rust version 1.31 is released. Patch from Alex Crichton.
7268 Fixes bugs 27272, 27273, and 27274. Bugfix on 0.3.1.1-alpha.
7270 o Major bugfixes (embedding, main loop):
7271 - When DisableNetwork becomes set, actually disable periodic events
7272 that are already enabled. (Previously, we would refrain from
7273 enabling new ones, but we would leave the old ones turned on.)
7274 Fixes bug 28348; bugfix on 0.3.4.1-alpha.
7276 o Minor features (continuous integration):
7277 - Add a Travis CI build for --enable-nss on Linux gcc. Closes
7279 - Add new CI job to Travis configuration to run stem-based
7280 integration tests. Closes ticket 27913.
7282 o Minor features (Windows, continuous integration):
7283 - Build tor on Windows Server 2012 R2 and Windows Server 2016 using
7284 Appveyor's CI. Closes ticket 28318.
7286 o Minor bugfixes (C correctness, also in 0.3.4.9):
7287 - Avoid undefined behavior in an end-of-string check when parsing
7288 the BEGIN line in a directory object. Fixes bug 28202; bugfix
7291 o Minor bugfixes (compilation):
7292 - Fix a pair of missing headers on OpenBSD. Fixes bug 28303; bugfix
7293 on 0.3.5.1-alpha. Patch from Kris Katterjohn.
7295 o Minor bugfixes (compilation, OpenSolaris):
7296 - Fix compilation on OpenSolaris and its descendants by adding a
7297 missing include to compat_pthreads.c. Fixes bug 27963; bugfix
7300 o Minor bugfixes (configuration):
7301 - Refuse to start with relative file paths and RunAsDaemon set
7302 (regression from the fix for bug 22731). Fixes bug 28298; bugfix
7305 o Minor bugfixes (directory authority, also in 0.3.4.9):
7306 - Log additional info when we get a relay that shares an ed25519 ID
7307 with a different relay, instead of a BUG() warning with a
7308 backtrace. Fixes bug 27800; bugfix on 0.3.2.1-alpha.
7310 o Minor bugfixes (onion service v3):
7311 - Build the service descriptor's signing key certificate before
7312 uploading, so we always have a fresh one: leaving no chances for
7313 it to expire service side. Fixes bug 27838; bugfix
7316 o Minor bugfixes (onion service v3, client authorization):
7317 - Fix an assert() when adding a client authorization for the first
7318 time and then sending a HUP signal to the service. Before that,
7319 Tor would stop abruptly. Fixes bug 27995; bugfix on 0.3.5.1-alpha.
7321 o Minor bugfixes (onion services):
7322 - Unless we have explicitly set HiddenServiceVersion, detect the
7323 onion service version and then look for invalid options.
7324 Previously, we did the reverse, but that broke existing configs
7325 which were pointed to a v2 service and had options like
7326 HiddenServiceAuthorizeClient set. Fixes bug 28127; bugfix on
7327 0.3.5.1-alpha. Patch by Neel Chauhan.
7329 o Minor bugfixes (portability):
7330 - Make the OPE code (which is used for v3 onion services) run
7331 correctly on big-endian platforms. Fixes bug 28115; bugfix
7334 o Minor bugfixes (protover, rust):
7335 - Reject extra commas in version strings. Fixes bug 27197; bugfix
7338 o Minor bugfixes (relay shutdown, systemd):
7339 - Notify systemd of ShutdownWaitLength so it can be set to longer
7340 than systemd's TimeoutStopSec. In Tor's systemd service file, set
7341 TimeoutSec to 60 seconds to allow Tor some time to shut down.
7342 Fixes bug 28113; bugfix on 0.2.6.2-alpha.
7344 o Minor bugfixes (rust, also in 0.3.4.9):
7345 - Fix a potential null dereference in protover_all_supported(). Add
7346 a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha.
7347 - Return a string that can be safely freed by C code, not one
7348 created by the rust allocator, in protover_all_supported(). Fixes
7349 bug 27740; bugfix on 0.3.3.1-alpha.
7351 o Minor bugfixes (rust, directory authority, also in 0.3.4.9):
7352 - Fix an API mismatch in the rust implementation of
7353 protover_compute_vote(). This bug could have caused crashes on any
7354 directory authorities running Tor with Rust (which we do not yet
7355 recommend). Fixes bug 27741; bugfix on 0.3.3.6.
7357 o Minor bugfixes (testing):
7358 - Avoid hangs and race conditions in test_rebind.py. Fixes bug
7359 27968; bugfix on 0.3.5.1-alpha.
7361 o Minor bugfixes (testing, also in 0.3.4.9):
7362 - Treat backtrace test failures as expected on BSD-derived systems
7363 (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808.
7364 (FreeBSD failures have been treated as expected since 18204 in
7365 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha.
7367 o Documentation (onion service manpage):
7368 - Improve HSv3 client authorization by making some options more
7369 explicit and detailed. Closes ticket 28026. Patch by Mike Tigas.
7372 Changes in version 0.3.4.9 - 2018-11-02
7373 Tor 0.3.4.9 is the second stable release in its series; it backports
7374 numerous fixes, including a fix for a bandwidth management bug that
7375 was causing memory exhaustion on relays. Anyone running an earlier
7376 version of Tor 0.3.4.9 should upgrade.
7378 o Major bugfixes (compilation, backport from 0.3.5.3-alpha):
7379 - Fix compilation on ARM (and other less-used CPUs) when compiling
7380 with OpenSSL before 1.1. Fixes bug 27781; bugfix on 0.3.4.1-alpha.
7382 o Major bugfixes (mainloop, bootstrap, backport from 0.3.5.3-alpha):
7383 - Make sure Tor bootstraps and works properly if only the
7384 ControlPort is set. Prior to this fix, Tor would only bootstrap
7385 when a client port was set (Socks, Trans, NATD, DNS or HTTPTunnel
7386 port). Fixes bug 27849; bugfix on 0.3.4.1-alpha.
7388 o Major bugfixes (relay, backport from 0.3.5.3-alpha):
7389 - When our write bandwidth limit is exhausted, stop writing on the
7390 connection. Previously, we had a typo in the code that would make
7391 us stop reading instead, leading to relay connections being stuck
7392 indefinitely and consuming kernel RAM. Fixes bug 28089; bugfix
7395 o Major bugfixes (restart-in-process, backport from 0.3.5.1-alpha):
7396 - Fix a use-after-free error that could be caused by passing Tor an
7397 impossible set of options that would fail during options_act().
7398 Fixes bug 27708; bugfix on 0.3.3.1-alpha.
7400 o Minor features (continuous integration, backport from 0.3.5.1-alpha):
7401 - Don't do a distcheck with --disable-module-dirauth in Travis.
7402 Implements ticket 27252.
7403 - Only run one online rust build in Travis, to reduce network
7404 errors. Skip offline rust builds on Travis for Linux gcc, because
7405 they're redundant. Implements ticket 27252.
7406 - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a
7407 duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on
7408 Linux with default settings, because all the non-default builds
7409 use gcc on Linux. Implements ticket 27252.
7411 o Minor features (continuous integration, backport from 0.3.5.3-alpha):
7412 - Use the Travis Homebrew addon to install packages on macOS during
7413 Travis CI. The package list is the same, but the Homebrew addon
7414 does not do a `brew update` by default. Implements ticket 27738.
7416 o Minor features (geoip):
7417 - Update geoip and geoip6 to the October 9 2018 Maxmind GeoLite2
7418 Country database. Closes ticket 27991.
7420 o Minor bugfixes (32-bit OSX and iOS, timing, backport from 0.3.5.2-alpha):
7421 - Fix an integer overflow bug in our optimized 32-bit millisecond-
7422 difference algorithm for 32-bit Apple platforms. Previously, it
7423 would overflow when calculating the difference between two times
7424 more than 47 days apart. Fixes part of bug 27139; bugfix
7426 - Improve the precision of our 32-bit millisecond difference
7427 algorithm for 32-bit Apple platforms. Fixes part of bug 27139;
7428 bugfix on 0.3.4.1-alpha.
7429 - Relax the tolerance on the mainloop/update_time_jumps test when
7430 running on 32-bit Apple platforms. Fixes part of bug 27139; bugfix
7433 o Minor bugfixes (C correctness, to appear in 0.3.5.4-alpha):
7434 - Avoid undefined behavior in an end-of-string check when parsing
7435 the BEGIN line in a directory object. Fixes bug 28202; bugfix
7438 o Minor bugfixes (CI, appveyor, to appear in 0.3.5.4-alpha):
7439 - Only install the necessary mingw packages during our appveyor
7440 builds. This change makes the build a little faster, and prevents
7441 a conflict with a preinstalled mingw openssl that appveyor now
7442 ships. Fixes bugs 27943 and 27765; bugfix on 0.3.4.2-alpha.
7444 o Minor bugfixes (code safety, backport from 0.3.5.3-alpha):
7445 - Rewrite our assertion macros so that they no longer suppress the
7446 compiler's -Wparentheses warnings. Fixes bug 27709; bugfix
7448 o Minor bugfixes (continuous integration, backport from 0.3.5.1-alpha):
7449 - Stop reinstalling identical packages in our Windows CI. Fixes bug
7450 27464; bugfix on 0.3.4.1-alpha.
7452 o Minor bugfixes (directory authority, to appear in 0.3.5.4-alpha):
7453 - Log additional info when we get a relay that shares an ed25519 ID
7454 with a different relay, instead making a BUG() warning. Fixes bug
7455 27800; bugfix on 0.3.2.1-alpha.
7457 o Minor bugfixes (directory connection shutdown, backport from 0.3.5.1-alpha):
7458 - Avoid a double-close when shutting down a stalled directory
7459 connection. Fixes bug 26896; bugfix on 0.3.4.1-alpha.
7461 o Minor bugfixes (HTTP tunnel, backport from 0.3.5.1-alpha):
7462 - Fix a bug warning when closing an HTTP tunnel connection due to an
7463 HTTP request we couldn't handle. Fixes bug 26470; bugfix
7466 o Minor bugfixes (netflow padding, backport from 0.3.5.1-alpha):
7467 - Ensure circuitmux queues are empty before scheduling or sending
7468 padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha.
7470 o Minor bugfixes (onion service v3, backport from 0.3.5.1-alpha):
7471 - When the onion service directory can't be created or has the wrong
7472 permissions, do not log a stack trace. Fixes bug 27335; bugfix
7475 o Minor bugfixes (onion service v3, backport from 0.3.5.2-alpha):
7476 - Close all SOCKS request (for the same .onion) if the newly fetched
7477 descriptor is unusable. Before that, we would close only the first
7478 one leaving the other hanging and let to time out by themselves.
7479 Fixes bug 27410; bugfix on 0.3.2.1-alpha.
7481 o Minor bugfixes (onion service v3, backport from 0.3.5.3-alpha):
7482 - When selecting a v3 rendezvous point, don't only look at the
7483 protover, but also check whether the curve25519 onion key is
7484 present. This way we avoid picking a relay that supports the v3
7485 rendezvous but for which we don't have the microdescriptor. Fixes
7486 bug 27797; bugfix on 0.3.2.1-alpha.
7488 o Minor bugfixes (protover, backport from 0.3.5.3-alpha):
7489 - Reject protocol names containing bytes other than alphanumeric
7490 characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix
7493 o Minor bugfixes (rust, backport from 0.3.5.1-alpha):
7494 - Compute protover votes correctly in the rust version of the
7495 protover code. Previously, the protover rewrite in 24031 allowed
7496 repeated votes from the same voter for the same protocol version
7497 to be counted multiple times in protover_compute_vote(). Fixes bug
7498 27649; bugfix on 0.3.3.5-rc.
7499 - Reject protover names that contain invalid characters. Fixes bug
7500 27687; bugfix on 0.3.3.1-alpha.
7502 o Minor bugfixes (rust, backport from 0.3.5.2-alpha):
7503 - protover_all_supported() would attempt to allocate up to 16GB on
7504 some inputs, leading to a potential memory DoS. Fixes bug 27206;
7505 bugfix on 0.3.3.5-rc.
7507 o Minor bugfixes (rust, directory authority, to appear in 0.3.5.4-alpha):
7508 - Fix an API mismatch in the rust implementation of
7509 protover_compute_vote(). This bug could have caused crashes on any
7510 directory authorities running Tor with Rust (which we do not yet
7511 recommend). Fixes bug 27741; bugfix on 0.3.3.6.
7513 o Minor bugfixes (rust, to appear in 0.3.5.4-alpha):
7514 - Fix a potential null dereference in protover_all_supported(). Add
7515 a test for it. Fixes bug 27804; bugfix on 0.3.3.1-alpha.
7516 - Return a string that can be safely freed by C code, not one
7517 created by the rust allocator, in protover_all_supported(). Fixes
7518 bug 27740; bugfix on 0.3.3.1-alpha.
7520 o Minor bugfixes (testing, backport from 0.3.5.1-alpha):
7521 - If a unit test running in a subprocess exits abnormally or with a
7522 nonzero status code, treat the test as having failed, even if the
7523 test reported success. Without this fix, memory leaks don't cause
7524 the tests to fail, even with LeakSanitizer. Fixes bug 27658;
7525 bugfix on 0.2.2.4-alpha.
7527 o Minor bugfixes (testing, backport from 0.3.5.3-alpha):
7528 - Make the hs_service tests use the same time source when creating
7529 the introduction point and when testing it. Now tests work better
7530 on very slow systems like ARM or Travis. Fixes bug 27810; bugfix
7533 o Minor bugfixes (testing, to appear in 0.3.5.4-alpha):
7534 - Treat backtrace test failures as expected on BSD-derived systems
7535 (NetBSD, OpenBSD, and macOS/Darwin) until we solve bug 17808.
7536 (FreeBSD failures have been treated as expected since 18204 in
7537 0.2.8.) Fixes bug 27948; bugfix on 0.2.5.2-alpha.
7540 Changes in version 0.3.5.3-alpha - 2018-10-17
7541 Tor 0.3.5.3-alpha fixes several bugs, mostly from previous 0.3.5.x
7542 versions. One important fix for relays addresses a problem with rate-
7543 limiting code from back in 0.3.4.x: If the fix works out, we'll be
7544 backporting it soon. This release is still an alpha, but we hope it's
7545 getting closer and closer to stability.
7547 o Major features (onion services):
7548 - Version 3 onion services can now use the per-service
7549 HiddenServiceExportCircuitID option to differentiate client
7550 circuits. It communicates with the service by using the HAProxy
7551 protocol to assign virtual IP addresses to inbound client
7552 circuits. Closes ticket 4700. Patch by Mahrud Sayrafi.
7554 o Major bugfixes (compilation):
7555 - Fix compilation on ARM (and other less-used CPUs) when compiling
7556 with OpenSSL before 1.1. Fixes bug 27781; bugfix on 0.3.4.1-alpha.
7558 o Major bugfixes (initialization, crash):
7559 - Fix an assertion crash that would stop Tor from starting up if it
7560 tried to activate a periodic event too early. Fixes bug 27861;
7561 bugfix on 0.3.5.1-alpha.
7563 o Major bugfixes (mainloop, bootstrap):
7564 - Make sure Tor bootstraps and works properly if only the
7565 ControlPort is set. Prior to this fix, Tor would only bootstrap
7566 when a client port was set (Socks, Trans, NATD, DNS or HTTPTunnel
7567 port). Fixes bug 27849; bugfix on 0.3.4.1-alpha.
7569 o Major bugfixes (relay):
7570 - When our write bandwidth limit is exhausted, stop writing on the
7571 connection. Previously, we had a typo in the code that would make
7572 us stop reading instead, leading to relay connections being stuck
7573 indefinitely and consuming kernel RAM. Fixes bug 28089; bugfix
7576 o Minor features (continuous integration):
7577 - Use the Travis Homebrew addon to install packages on macOS during
7578 Travis CI. The package list is the same, but the Homebrew addon
7579 does not do a `brew update` by default. Implements ticket 27738.
7580 - Report what program produced the mysterious core file that we
7581 occasionally see on Travis CI during make distcheck. Closes
7584 o Minor features (geoip):
7585 - Update geoip and geoip6 to the October 9 2018 Maxmind GeoLite2
7586 Country database. Closes ticket 27991.
7588 o Minor bugfixes (code safety):
7589 - Rewrite our assertion macros so that they no longer suppress the
7590 compiler's -Wparentheses warnings. Fixes bug 27709; bugfix
7593 o Minor bugfixes (compilation):
7594 - Compile the ed25519-donna code with a correct declaration of
7595 crypto_strongest_rand(). Previously, we built it with one type,
7596 but linked it against another in the unit tests, which caused
7597 compilation failures with LTO enabled. This could have caused
7598 other undefined behavior in the tests. Fixes bug 27728; bugfix
7601 o Minor bugfixes (compilation, netbsd):
7602 - Add a missing include back into procmon.c. Fixes bug 27990; bugfix
7605 o Minor bugfixes (continuous integration, appveyor):
7606 - Install only the necessary mingw packages during our appveyor
7607 builds. This change makes the build a little faster, and prevents
7608 a conflict with a preinstalled mingw openssl that appveyor now
7609 ships. Fixes bugs 27765 and 27943; bugfix on 0.3.4.2-alpha.
7611 o Minor bugfixes (directory permissions):
7612 - When a user requests a group-readable DataDirectory, give it to
7613 them. Previously, when the DataDirectory and the CacheDirectory
7614 were the same, the default setting (0) for
7615 CacheDirectoryGroupReadable would override the setting for
7616 DataDirectoryGroupReadable. Fixes bug 26913; bugfix
7619 o Minor bugfixes (memory leaks):
7620 - Fix a small memory leak when calling Tor with --dump-config. Fixes
7621 bug 27893; bugfix on 0.3.2.1-alpha.
7623 o Minor bugfixes (networking):
7624 - In retry_listeners_ports(), make sure that we're removing a member
7625 of old_conns smartlist at most once. Fixes bug 27808; bugfix
7627 - Refrain from attempting socket rebinding when old and new
7628 listeners are in different address families. Fixes bug 27928;
7629 bugfix on 0.3.5.1-alpha.
7631 o Minor bugfixes (onion service v3):
7632 - Stop dumping a stack trace when trying to connect to an intro
7633 point without having a descriptor for it. Fixes bug 27774; bugfix
7635 - Don't warn so loudly when Tor is unable to decode an onion
7636 descriptor. This can now happen as a normal use case if a client
7637 gets a descriptor with client authorization but the client is not
7638 authorized. Fixes bug 27550; bugfix on 0.3.5.1-alpha.
7639 - When selecting a v3 rendezvous point, don't only look at the
7640 protover, but also check whether the curve25519 onion key is
7641 present. This way we avoid picking a relay that supports the v3
7642 rendezvous but for which we don't have the microdescriptor. Fixes
7643 bug 27797; bugfix on 0.3.2.1-alpha.
7645 o Minor bugfixes (protover):
7646 - Reject protocol names containing bytes other than alphanumeric
7647 characters and hyphens ([A-Za-z0-9-]). Fixes bug 27316; bugfix
7650 o Minor bugfixes (testing):
7651 - Make the hs_service tests use the same time source when creating
7652 the introduction point and when testing it. Now tests work better
7653 on very slow systems like ARM or Travis. Fixes bug 27810; bugfix
7655 - In test_rebind.py, check if the Python version is in the supported
7656 range. Fixes bug 27675; bugfix on 0.3.5.1-alpha.
7658 o Code simplification and refactoring:
7659 - Divide more large Tor source files -- especially ones that span
7660 multiple areas of functionality -- into smaller parts, including
7661 onion.c and main.c. Closes ticket 26747.
7662 - Divide the "routerparse.c" module into separate modules for each
7663 group of parsed objects. Closes ticket 27924.
7664 - Move protover_rust.c to the same place protover.c was moved to.
7665 Closes ticket 27814.
7666 - Split directory.c into separate pieces for client, server, and
7667 common functionality. Closes ticket 26744.
7668 - Split the non-statistics-related parts from the rephist.c and
7669 geoip.c modules. Closes ticket 27892.
7670 - Split the router.c file into relay-only and shared components, to
7671 help with future modularization. Closes ticket 27864.
7674 - In the tor-resolve(1) manpage, fix the reference to socks-
7675 extensions.txt by adding a web URL. Resolves ticket 27853.
7676 - Mention that we require Python to be 2.7 or newer for some
7677 integration tests that we ship with Tor. Resolves ticket 27677.
7680 Changes in version 0.3.5.2-alpha - 2018-09-21
7681 Tor 0.3.5.2-alpha fixes several bugs in 0.3.5.1-alpha, including one
7682 that made Tor think it had run out of sockets. Anybody running a relay
7683 or an onion service on 0.3.5.1-alpha should upgrade.
7685 o Major bugfixes (relay bandwidth statistics):
7686 - When we close relayed circuits, report the data in the circuit
7687 queues as being written in our relay bandwidth stats. This
7688 mitigates guard discovery and other attacks that close circuits
7689 for the explicit purpose of noticing this discrepancy in
7690 statistics. Fixes bug 23512; bugfix on 0.0.8pre3.
7692 o Major bugfixes (socket accounting):
7693 - In our socket accounting code, count a socket as closed even when
7694 it is closed indirectly by the TLS layer. Previously, we would
7695 count these sockets as still in use, and incorrectly believe that
7696 we had run out of sockets. Fixes bug 27795; bugfix
7699 o Minor bugfixes (32-bit OSX and iOS, timing):
7700 - Fix an integer overflow bug in our optimized 32-bit millisecond-
7701 difference algorithm for 32-bit Apple platforms. Previously, it
7702 would overflow when calculating the difference between two times
7703 more than 47 days apart. Fixes part of bug 27139; bugfix
7705 - Improve the precision of our 32-bit millisecond difference
7706 algorithm for 32-bit Apple platforms. Fixes part of bug 27139;
7707 bugfix on 0.3.4.1-alpha.
7708 - Relax the tolerance on the mainloop/update_time_jumps test when
7709 running on 32-bit Apple platforms. Fixes part of bug 27139; bugfix
7712 o Minor bugfixes (onion service v3):
7713 - Close all SOCKS request (for the same .onion) if the newly fetched
7714 descriptor is unusable. Before that, we would close only the first
7715 one leaving the other hanging and let to time out by themselves.
7716 Fixes bug 27410; bugfix on 0.3.2.1-alpha.
7718 o Minor bugfixes (memory leak):
7719 - Fix an unlikely memory leak when trying to read a private key from
7720 a ridiculously large file. Fixes bug 27764; bugfix on
7721 0.3.5.1-alpha. This is CID 1439488.
7723 o Minor bugfixes (NSS):
7724 - Correctly detect failure to open a dummy TCP socket when stealing
7725 ownership of an fd from the NSS layer. Fixes bug 27782; bugfix
7728 o Minor bugfixes (rust):
7729 - protover_all_supported() would attempt to allocate up to 16GB on
7730 some inputs, leading to a potential memory DoS. Fixes bug 27206;
7731 bugfix on 0.3.3.5-rc.
7733 o Minor bugfixes (testing):
7734 - Revise the "conditionvar_timeout" test so that it succeeds even on
7735 heavily loaded systems where the test threads are not scheduled
7736 within 200 msec. Fixes bug 27073; bugfix on 0.2.6.3-alpha.
7738 o Code simplification and refactoring:
7739 - Divide the routerlist.c and dirserv.c modules into smaller parts.
7740 Closes ticket 27799.
7743 Changes in version 0.3.5.1-alpha - 2018-09-18
7744 Tor 0.3.5.1-alpha is the first release of the 0.3.5.x series. It adds
7745 client authorization for modern (v3) onion services, improves
7746 bootstrap reporting, begins reorganizing Tor's codebase, adds optional
7747 support for NSS in place of OpenSSL, and much more.
7749 o Major features (onion services, UI change):
7750 - For a newly created onion service, the default version is now 3.
7751 Tor still supports existing version 2 services, but the operator
7752 now needs to set "HiddenServiceVersion 2" in order to create a new
7753 version 2 service. For existing services, Tor now learns the
7754 version by reading the key file. Closes ticket 27215.
7756 o Major features (relay, UI change):
7757 - Relays no longer run as exits by default. If the "ExitRelay"
7758 option is auto (or unset), and no exit policy is specified with
7759 ExitPolicy or ReducedExitPolicy, we now treat ExitRelay as 0.
7760 Previously in this case, we allowed exit traffic and logged a
7761 warning message. Closes ticket 21530. Patch by Neel Chauhan.
7762 - Tor now validates that the ContactInfo config option is valid UTF-
7763 8 when parsing torrc. Closes ticket 27428.
7765 o Major features (bootstrap):
7766 - Don't report directory progress until after a connection to a
7767 relay or bridge has succeeded. Previously, we'd report 80%
7768 progress based on cached directory information when we couldn't
7769 even connect to the network. Closes ticket 27169.
7771 o Major features (new code layout):
7772 - Nearly all of Tor's source code has been moved around into more
7773 logical places. The "common" directory is now divided into a set
7774 of libraries in "lib", and files in the "or" directory have been
7775 split into "core" (logic absolutely needed for onion routing),
7776 "feature" (independent modules in Tor), and "app" (to configure
7777 and invoke the rest of Tor). See doc/HACKING/CodeStructure.md for
7778 more information. Closes ticket 26481.
7780 This refactoring is not complete: although the libraries have been
7781 refactored to be acyclic, the main body of Tor is still too
7782 interconnected. We will attempt to improve this in the future.
7784 o Major features (onion services v3):
7785 - Implement onion service client authorization at the descriptor
7786 level: only authorized clients can decrypt a service's descriptor
7787 to find out how to contact it. A new torrc option was added to
7788 control this client side: ClientOnionAuthDir <path>. On the
7789 service side, if the "authorized_clients/" directory exists in the
7790 onion service directory path, client configurations are read from
7791 the files within. See the manpage for more details. Closes ticket
7792 27547. Patch done by Suphanat Chunhapanya (haxxpop).
7793 - Improve revision counter generation in next-gen onion services.
7794 Onion services can now scale by hosting multiple instances on
7795 different hosts without synchronization between them, which was
7796 previously impossible because descriptors would get rejected by
7797 HSDirs. Addresses ticket 25552.
7799 o Major features (portability, cryptography, experimental, TLS):
7800 - Tor now has the option to compile with the NSS library instead of
7801 OpenSSL. This feature is experimental, and we expect that bugs may
7802 remain. It is mainly intended for environments where Tor's
7803 performance is not CPU-bound, and where NSS is already known to be
7804 installed. To try it out, configure Tor with the --enable-nss
7805 flag. Closes tickets 26631, 26815, and 26816.
7807 If you are experimenting with this option and using an old cached
7808 consensus, Tor may fail to start. To solve this, delete your
7809 "cached-consensus" and "cached-microdesc-consensus" files,
7810 (if present), and restart Tor.
7812 o Major bugfixes (directory authority):
7813 - Actually check that the address we get from DirAuthority
7814 configuration line is valid IPv4. Explicitly disallow DirAuthority
7815 address to be a DNS hostname. Fixes bug 26488; bugfix
7818 o Major bugfixes (restart-in-process):
7819 - Fix a use-after-free error that could be caused by passing Tor an
7820 impossible set of options that would fail during options_act().
7821 Fixes bug 27708; bugfix on 0.3.3.1-alpha.
7823 o Minor features (admin tools):
7824 - Add a new --key-expiration option to print the expiration date of
7825 the signing cert in an ed25519_signing_cert file. Resolves
7828 o Minor features (build):
7829 - If you pass the "--enable-pic" option to configure, Tor will try
7830 to tell the compiler to build position-independent code suitable
7831 to link into a dynamic library. (The default remains -fPIE, for
7832 code suitable for a relocatable executable.) Closes ticket 23846.
7834 o Minor features (code correctness, testing):
7835 - Tor's build process now includes a "check-includes" make target to
7836 verify that no module of Tor relies on any headers from a higher-
7837 level module. We hope to use this feature over time to help
7838 refactor our codebase. Closes ticket 26447.
7840 o Minor features (code layout):
7841 - We have a new "lowest-level" error-handling API for use by code
7842 invoked from within the logging module. With this interface, the
7843 logging code is no longer at risk of calling into itself if a
7844 failure occurs while it is trying to log something. Closes
7847 o Minor features (compilation):
7848 - Tor's configure script now supports a --with-malloc= option to
7849 select your malloc implementation. Supported options are
7850 "tcmalloc", "jemalloc", "openbsd" (deprecated), and "system" (the
7851 default). Addresses part of ticket 20424. Based on a patch from
7854 o Minor features (config):
7855 - The "auto" keyword in torrc is now case-insensitive. Closes
7858 o Minor features (continuous integration):
7859 - Don't do a distcheck with --disable-module-dirauth in Travis.
7860 Implements ticket 27252.
7861 - Install libcap-dev and libseccomp2-dev so these optional
7862 dependencies get tested on Travis CI. Closes ticket 26560.
7863 - Only run one online rust build in Travis, to reduce network
7864 errors. Skip offline rust builds on Travis for Linux gcc, because
7865 they're redundant. Implements ticket 27252.
7866 - Skip gcc on OSX in Travis CI, because it's rarely used. Skip a
7867 duplicate hardening-off build in Travis on Tor 0.2.9. Skip gcc on
7868 Linux with default settings, because all the non-default builds
7869 use gcc on Linux. Implements ticket 27252.
7871 o Minor features (controller):
7872 - Emit CIRC_BW events as soon as we detect that we processed an
7873 invalid or otherwise dropped cell on a circuit. This allows
7874 vanguards and other controllers to react more quickly to dropped
7875 cells. Closes ticket 27678.
7876 - For purposes of CIRC_BW-based dropped cell detection, track half-
7877 closed stream ids, and allow their ENDs, SENDMEs, DATA and path
7878 bias check cells to arrive without counting it as dropped until
7879 either the END arrives, or the windows are empty. Closes
7881 - Implement a 'GETINFO md/all' controller command to enable getting
7882 all known microdescriptors. Closes ticket 8323.
7883 - The GETINFO command now support an "uptime" argument, to return
7884 Tor's uptime in seconds. Closes ticket 25132.
7886 o Minor features (denial-of-service avoidance):
7887 - Make our OOM handler aware of the DNS cache so that it doesn't
7888 fill up the memory. This check is important for our DoS mitigation
7889 subsystem. Closes ticket 18642. Patch by Neel Chauhan.
7891 o Minor features (development):
7892 - Tor's makefile now supports running the "clippy" Rust style tool
7893 on our Rust code. Closes ticket 22156.
7895 o Minor features (directory authority):
7896 - There is no longer an artificial upper limit on the length of
7897 bandwidth lines. Closes ticket 26223.
7898 - When a bandwidth file is used to obtain the bandwidth measurements,
7899 include this bandwidth file headers in the votes. Closes
7901 - Improved support for networks with only a single authority or a
7902 single fallback directory. Patch from Gabriel Somlo. Closes
7905 o Minor features (embedding API):
7906 - The Tor controller API now supports a function to launch Tor with
7907 a preconstructed owning controller FD, so that embedding
7908 applications don't need to manage controller ports and
7909 authentication. Closes ticket 24204.
7910 - The Tor controller API now has a function that returns the name
7911 and version of the backend implementing the API. Closes
7914 o Minor features (geoip):
7915 - Update geoip and geoip6 to the September 6 2018 Maxmind GeoLite2
7916 Country database. Closes ticket 27631.
7918 o Minor features (memory management):
7919 - Get Libevent to use the same memory allocator as Tor, by calling
7920 event_set_mem_functions() during initialization. Resolves
7923 o Minor features (memory usage):
7924 - When not using them, store legacy TAP public onion keys in DER-
7925 encoded format, rather than as expanded public keys. This should
7926 save several megabytes on typical clients. Closes ticket 27246.
7928 o Minor features (OpenSSL):
7929 - When possible, use RFC5869 HKDF implementation from OpenSSL rather
7930 than our own. Resolves ticket 19979.
7932 o Minor features (Rust, code quality):
7933 - Improve rust code quality in the rust protover implementation by
7934 making it more idiomatic. Includes changing an internal API to
7935 take &str instead of &String. Closes ticket 26492.
7937 o Minor features (testing):
7938 - Add scripts/test/chutney-git-bisect.sh, for bisecting using
7939 chutney. Implements ticket 27211.
7941 o Minor features (tor-resolve):
7942 - The tor-resolve utility can now be used with IPv6 SOCKS proxies.
7943 Side-effect of the refactoring for ticket 26526.
7945 o Minor features (UI):
7946 - Log each included configuration file or directory as we read it,
7947 to provide more visibility about where Tor is reading from. Patch
7948 from Unto Sten; closes ticket 27186.
7949 - Lower log level of "Scheduler type KIST has been enabled" to INFO.
7950 Closes ticket 26703.
7952 o Minor bugfixes (bootstrap):
7953 - Try harder to get descriptors in non-exit test networks, by using
7954 the mid weight for the third hop when there are no exits. Fixes
7955 bug 27237; bugfix on 0.2.6.2-alpha.
7957 o Minor bugfixes (C correctness):
7958 - Avoid casting smartlist index to int implicitly, as it may trigger
7959 a warning (-Wshorten-64-to-32). Fixes bug 26282; bugfix on
7960 0.2.3.13-alpha, 0.2.7.1-alpha and 0.2.1.1-alpha.
7961 - Use time_t for all values in
7962 predicted_ports_prediction_time_remaining(). Rework the code that
7963 computes difference between durations/timestamps. Fixes bug 27165;
7964 bugfix on 0.3.1.1-alpha.
7966 o Minor bugfixes (client, memory usage):
7967 - When not running as a directory cache, there is no need to store
7968 the text of the current consensus networkstatus in RAM.
7969 Previously, however, clients would store it anyway, at a cost of
7970 over 5 MB. Now, they do not. Fixes bug 27247; bugfix
7973 o Minor bugfixes (client, reachableaddresses):
7974 - Instead of adding a "reject *:*" line to ReachableAddresses when
7975 loading the configuration, add one to the policy after parsing it
7976 in parse_reachable_addresses(). This prevents extra "reject *.*"
7977 lines from accumulating on reloads. Fixes bug 20874; bugfix on
7978 0.1.1.5-alpha. Patch by Neel Chauhan.
7980 o Minor bugfixes (code quality):
7981 - Rename sandbox_getaddrinfo() and other functions to no longer
7982 misleadingly suggest that they are sandbox-only. Fixes bug 26525;
7983 bugfix on 0.2.7.1-alpha.
7985 o Minor bugfixes (configuration, Onion Services):
7986 - In rend_service_parse_port_config(), disallow any input to remain
7987 after address-port pair was parsed. This will catch address and
7988 port being whitespace-separated by mistake of the user. Fixes bug
7989 27044; bugfix on 0.2.9.10.
7991 o Minor bugfixes (continuous integration):
7992 - Stop reinstalling identical packages in our Windows CI. Fixes bug
7993 27464; bugfix on 0.3.4.1-alpha.
7995 o Minor bugfixes (controller):
7996 - Consider all routerinfo errors other than "not a server" to be
7997 transient for the purpose of "GETINFO exit-policy/*" controller
7998 request. Print stacktrace in the unlikely case of failing to
7999 recompute routerinfo digest. Fixes bug 27034; bugfix
8002 o Minor bugfixes (directory connection shutdown):
8003 - Avoid a double-close when shutting down a stalled directory
8004 connection. Fixes bug 26896; bugfix on 0.3.4.1-alpha.
8006 o Minor bugfixes (HTTP tunnel):
8007 - Fix a bug warning when closing an HTTP tunnel connection due to an
8008 HTTP request we couldn't handle. Fixes bug 26470; bugfix
8011 o Minor bugfixes (ipv6):
8012 - In addrs_in_same_network_family(), we choose the subnet size based
8013 on the IP version (IPv4 or IPv6). Previously, we chose a fixed
8014 subnet size of /16 for both IPv4 and IPv6 addresses. Fixes bug
8015 15518; bugfix on 0.2.3.1-alpha. Patch by Neel Chauhan.
8017 o Minor bugfixes (logging):
8018 - As a precaution, do an early return from log_addr_has_changed() if
8019 Tor is running as client. Also, log a stack trace for debugging as
8020 this function should only be called when Tor runs as server. Fixes
8021 bug 26892; bugfix on 0.1.1.9-alpha.
8022 - Refrain from mentioning bug 21018 in the logs, as it is already
8023 fixed. Fixes bug 25477; bugfix on 0.2.9.8.
8025 o Minor bugfixes (logging, documentation):
8026 - When SafeLogging is enabled, scrub IP address in
8027 channel_tls_process_netinfo_cell(). Also, add a note to manpage
8028 that scrubbing is not guaranteed on loglevels below Notice. Fixes
8029 bug 26882; bugfix on 0.2.4.10-alpha.
8031 o Minor bugfixes (netflow padding):
8032 - Ensure circuitmux queues are empty before scheduling or sending
8033 padding. Fixes bug 25505; bugfix on 0.3.1.1-alpha.
8035 o Minor bugfixes (onion service v2):
8036 - Log at level "info", not "warning", in the case that we do not
8037 have a consensus when a .onion request comes in. This can happen
8038 normally while bootstrapping. Fixes bug 27040; bugfix
8041 o Minor bugfixes (onion service v3):
8042 - When the onion service directory can't be created or has the wrong
8043 permissions, do not log a stack trace. Fixes bug 27335; bugfix
8046 o Minor bugfixes (OS compatibility):
8047 - Properly handle configuration changes that move a listener to/from
8048 wildcard IP address. If the first attempt to bind a socket fails,
8049 close the old listener and try binding the socket again. Fixes bug
8050 17873; bugfix on 0.0.8pre-1.
8052 o Minor bugfixes (performance)::
8053 - Rework node_is_a_configured_bridge() to no longer call
8054 node_get_all_orports(), which was performing too many memory
8055 allocations. Fixes bug 27224; bugfix on 0.2.3.9.
8057 o Minor bugfixes (relay statistics):
8058 - Update relay descriptor on bandwidth changes only when the uptime
8059 is smaller than 24h, in order to reduce the efficiency of guard
8060 discovery attacks. Fixes bug 24104; bugfix on 0.1.1.6-alpha.
8062 o Minor bugfixes (relays):
8063 - Consider the fact that we'll be making direct connections to our
8064 entry and guard nodes when computing the fraction of nodes that
8065 have their descriptors. Also, if we are using bridges and there is
8066 at least one bridge with a full descriptor, treat the fraction of
8067 guards available as 100%. Fixes bug 25886; bugfix on 0.2.4.10-alpha.
8068 Patch by Neel Chauhan.
8069 - Update the message logged on relays when DirCache is disabled.
8070 Since 0.3.3.5-rc, authorities require DirCache (V2Dir) for the
8071 Guard flag. Fixes bug 24312; bugfix on 0.3.3.5-rc.
8073 o Minor bugfixes (rust, protover):
8074 - Compute protover votes correctly in the rust version of the
8075 protover code. Previously, the protover rewrite in 24031 allowed
8076 repeated votes from the same voter for the same protocol version
8077 to be counted multiple times in protover_compute_vote(). Fixes bug
8078 27649; bugfix on 0.3.3.5-rc.
8079 - Reject protover names that contain invalid characters. Fixes bug
8080 27687; bugfix on 0.3.3.1-alpha.
8082 o Minor bugfixes (testing):
8083 - Fix two unit tests to work when HOME environment variable is not
8084 set. Fixes bug 27096; bugfix on 0.2.8.1-alpha.
8085 - If a unit test running in a subprocess exits abnormally or with a
8086 nonzero status code, treat the test as having failed, even if the
8087 test reported success. Without this fix, memory leaks don't cause
8088 the tests to fail, even with LeakSanitizer. Fixes bug 27658;
8089 bugfix on 0.2.2.4-alpha.
8090 - When logging a version mismatch in our openssl_version tests,
8091 report the actual offending version strings. Fixes bug 26152;
8092 bugfix on 0.2.9.1-alpha.
8093 - Fix forking tests on Windows when there is a space somewhere in
8094 the path. Fixes bug 26437; bugfix on 0.2.2.4-alpha.
8096 o Code simplification and refactoring:
8097 - 'updateFallbackDirs.py' now ignores the blacklist file, as it's not
8098 longer needed. Closes ticket 26502.
8099 - Include paths to header files within Tor are now qualified by
8100 directory within the top-level src directory.
8101 - Many structures have been removed from the centralized "or.h"
8102 header, and moved into their own headers. This will allow us to
8103 reduce the number of places in the code that rely on each
8104 structure's contents and layout. Closes ticket 26383.
8105 - Remove ATTR_NONNULL macro from codebase. Resolves ticket 26527.
8106 - Remove GetAdaptersAddresses_fn_t. The code that used it was
8107 removed as part of the 26481 refactor. Closes ticket 27467.
8108 - Rework Tor SOCKS server code to use Trunnel and benefit from
8109 autogenerated functions for parsing and generating SOCKS wire
8110 format. New implementation is cleaner, more maintainable and
8111 should be less prone to heartbleed-style vulnerabilities.
8112 Implements a significant fraction of ticket 3569.
8113 - Split sampled_guards_update_from_consensus() and
8114 select_entry_guard_for_circuit() into subfunctions. In
8115 entry_guards_update_primary() unite three smartlist enumerations
8116 into one and move smartlist comparison code out of the function.
8117 Closes ticket 21349.
8118 - Tor now assumes that you have standards-conformant stdint.h and
8119 inttypes.h headers when compiling. Closes ticket 26626.
8120 - Unify our bloom filter logic. Previously we had two copies of this
8121 code: one for routerlist filtering, and one for address set
8122 calculations. Closes ticket 26510.
8123 - Use the simpler strcmpstart() helper in
8124 rend_parse_v2_service_descriptor instead of strncmp(). Closes
8126 - Utility functions that can perform a DNS lookup are now wholly
8127 separated from those that can't, in separate headers and C
8128 modules. Closes ticket 26526.
8131 - Copy paragraph and URL to Tor's code of conduct document from
8132 CONTRIBUTING to new CODE_OF_CONDUCT file. Resolves ticket 26638.
8133 - Remove old instructions from INSTALL document. Closes ticket 26588.
8134 - Warn users that they should not include MyFamily line(s) in their
8135 torrc when running Tor bridge. Closes ticket 26908.
8138 - Tor no longer supports building with the dmalloc library. For
8139 debugging memory issues, we suggest using gperftools or msan
8140 instead. Closes ticket 26426.
8141 - Tor no longer attempts to run on Windows environments without the
8142 GetAdaptersAddresses() function. This function has existed since
8143 Windows XP, which is itself already older than we support.
8144 - Remove Tor2web functionality for version 2 onion services. The
8145 Tor2webMode and Tor2webRendezvousPoints options are now obsolete.
8146 (This feature was never shipped in vanilla Tor and it was only
8147 possible to use this feature by building the support at compile
8148 time. Tor2webMode is not implemented for version 3 onion services.)
8149 Closes ticket 26367.
8152 Changes in version 0.2.9.17 - 2018-09-10
8153 Tor 0.2.9.17 backports numerous bugfixes from later versions of Tor.
8155 o Minor features (compatibility, backport from 0.3.4.8):
8156 - Tell OpenSSL to maintain backward compatibility with previous
8157 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
8158 ciphers are disabled by default. Closes ticket 27344.
8160 o Minor features (continuous integration, backport from 0.3.4.7-rc):
8161 - Enable macOS builds in our Travis CI configuration. Closes
8163 - Install libcap-dev and libseccomp2-dev so these optional
8164 dependencies get tested on Travis CI. Closes ticket 26560.
8165 - Run asciidoc during Travis CI. Implements ticket 27087.
8166 - Use ccache in our Travis CI configuration. Closes ticket 26952.
8168 o Minor features (geoip):
8169 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
8170 Country database. Closes ticket 27089.
8172 o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
8173 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
8174 tell the compiler not to include the system malloc implementation.
8175 Fixes bug 20424; bugfix on 0.2.0.20-rc.
8177 o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
8178 - Silence a spurious compiler warning on the GetAdaptersAddresses
8179 function pointer cast. This issue is already fixed by 26481 in
8180 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
8181 bugfix on 0.2.3.11-alpha.
8182 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
8183 supported, and always fails. Some compilers warn about the
8184 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
8187 o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
8188 - Don't link or search for pthreads when building for Windows, even
8189 if we are using build environment (like mingw) that provides a
8190 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
8192 o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
8193 - Skip a pair of unreliable key generation tests on Windows, until
8194 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
8195 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
8197 o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
8198 - Pass the module flags to distcheck configure, and log the flags
8199 before running configure. (Backported to 0.2.9 and later as a
8200 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
8202 o Minor bugfixes (continuous integration, backport from 0.3.4.8):
8203 - When a Travis build fails, and showing a log fails, keep trying to
8204 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
8205 - When we use echo in Travis, don't pass a --flag as the first
8206 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
8208 o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
8209 - When voting for recommended versions, make sure that all of the
8210 versions are well-formed and parsable. Fixes bug 26485; bugfix
8213 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
8214 - Fix a bug in out sandboxing rules for the openat() syscall.
8215 Previously, no openat() call would be permitted, which would break
8216 filesystem operations on recent glibc versions. Fixes bug 25440;
8217 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
8219 o Minor bugfixes (onion services, backport from 0.3.4.8):
8220 - Silence a spurious compiler warning in
8221 rend_client_send_introduction(). Fixes bug 27463; bugfix
8224 o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
8225 - Log a protocol warning when single onion services or Tor2web clients
8226 fail to authenticate direct connections to relays.
8227 Fixes bug 26924; bugfix on 0.2.9.1-alpha.
8229 o Minor bugfixes (testing, backport from 0.3.4.6-rc):
8230 - Disable core dumps in test_bt.sh, to avoid failures in "make
8231 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
8233 o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
8234 - Before running make test-network-all, delete old logs and test
8235 result files, to avoid spurious failures. Fixes bug 27295; bugfix
8238 o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
8239 - Our "tortls/cert_matches_key" unit test no longer relies on
8240 OpenSSL internals. Previously, it relied on unsupported OpenSSL
8241 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
8242 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
8244 o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
8245 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
8246 27185; bugfix on 0.2.2.2-alpha.
8249 Changes in version 0.3.2.12 - 2018-09-10
8250 Tor 0.3.2.12 backport numerous fixes from later versions of Tor.
8252 o Minor features (compatibility, backport from 0.3.4.8):
8253 - Tell OpenSSL to maintain backward compatibility with previous
8254 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
8255 ciphers are disabled by default. Closes ticket 27344.
8257 o Minor features (continuous integration, backport from 0.3.4.7-rc):
8258 - Enable macOS builds in our Travis CI configuration. Closes
8260 - Install libcap-dev and libseccomp2-dev so these optional
8261 dependencies get tested on Travis CI. Closes ticket 26560.
8262 - Run asciidoc during Travis CI. Implements ticket 27087.
8263 - Use ccache in our Travis CI configuration. Closes ticket 26952.
8265 o Minor features (continuous integration, rust, backport from 0.3.4.7-rc):
8266 - Use cargo cache in our Travis CI configuration. Closes
8269 o Minor features (controller, backport from 0.3.4.6-rc):
8270 - The control port now exposes the list of HTTPTunnelPorts and
8271 ExtOrPorts via GETINFO net/listeners/httptunnel and
8272 net/listeners/extor respectively. Closes ticket 26647.
8274 o Minor features (directory authorities, backport from 0.3.4.7-rc):
8275 - Authorities no longer vote to make the subprotocol version
8276 "LinkAuth=1" a requirement: it is unsupportable with NSS, and
8277 hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
8279 o Minor features (geoip):
8280 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
8281 Country database. Closes ticket 27089.
8283 o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
8284 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
8285 tell the compiler not to include the system malloc implementation.
8286 Fixes bug 20424; bugfix on 0.2.0.20-rc.
8287 - Don't try to use a pragma to temporarily disable the
8288 -Wunused-const-variable warning if the compiler doesn't support
8289 it. Fixes bug 26785; bugfix on 0.3.2.11.
8291 o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
8292 - Silence a spurious compiler warning on the GetAdaptersAddresses
8293 function pointer cast. This issue is already fixed by 26481 in
8294 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
8295 bugfix on 0.2.3.11-alpha.
8296 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
8297 supported, and always fails. Some compilers warn about the
8298 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
8301 o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
8302 - Don't link or search for pthreads when building for Windows, even
8303 if we are using build environment (like mingw) that provides a
8304 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
8306 o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
8307 - Skip a pair of unreliable key generation tests on Windows, until
8308 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
8309 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
8311 o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
8312 - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
8313 - Pass the module flags to distcheck configure, and log the flags
8314 before running configure. (Backported to 0.2.9 and later as a
8315 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
8317 o Minor bugfixes (continuous integration, backport from 0.3.4.8):
8318 - When a Travis build fails, and showing a log fails, keep trying to
8319 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
8320 - When we use echo in Travis, don't pass a --flag as the first
8321 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
8323 o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
8324 - When voting for recommended versions, make sure that all of the
8325 versions are well-formed and parsable. Fixes bug 26485; bugfix
8328 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
8329 - Fix a bug in out sandboxing rules for the openat() syscall.
8330 Previously, no openat() call would be permitted, which would break
8331 filesystem operations on recent glibc versions. Fixes bug 25440;
8332 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
8334 o Minor bugfixes (logging, backport from 0.3.4.6-rc):
8335 - Improve the log message when connection initiators fail to
8336 authenticate direct connections to relays. Fixes bug 26927; bugfix
8339 o Minor bugfixes (onion services, backport from 0.3.4.7-rc):
8340 - Fix bug that causes services to not ever rotate their descriptors
8341 if they were getting SIGHUPed often. Fixes bug 26932; bugfix
8344 o Minor bugfixes (onion services, backport from 0.3.4.8):
8345 - Silence a spurious compiler warning in
8346 rend_client_send_introduction(). Fixes bug 27463; bugfix
8349 o Minor bugfixes (rust, backport from 0.3.4.7-rc):
8350 - Backport test_rust.sh from master. Fixes bug 26497; bugfix
8352 - Consistently use ../../.. as a fallback for $abs_top_srcdir in
8353 test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha.
8354 - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or
8355 $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha.
8357 o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
8358 - Log a protocol warning when single onion services or Tor2web clients
8359 fail to authenticate direct connections to relays.
8360 Fixes bug 26924; bugfix on 0.2.9.1-alpha.
8362 o Minor bugfixes (testing, backport from 0.3.4.6-rc):
8363 - Disable core dumps in test_bt.sh, to avoid failures in "make
8364 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
8366 o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
8367 - When running make test-network-all, use the mixed+hs-v2 network.
8368 (A previous fix to chutney removed v3 onion services from the
8369 mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
8370 confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
8371 - Before running make test-network-all, delete old logs and test
8372 result files, to avoid spurious failures. Fixes bug 27295; bugfix
8375 o Minor bugfixes (testing, openssl compatibility):
8376 - Our "tortls/cert_matches_key" unit test no longer relies on OpenSSL
8377 internals. Previously, it relied on unsupported OpenSSL behavior in
8378 a way that caused it to crash with OpenSSL 1.0.2p. Fixes bug 27226;
8379 bugfix on 0.2.5.1-alpha.
8381 o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
8382 - Our "tortls/cert_matches_key" unit test no longer relies on
8383 OpenSSL internals. Previously, it relied on unsupported OpenSSL
8384 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
8385 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
8387 o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
8388 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
8389 27185; bugfix on 0.2.2.2-alpha.
8392 Changes in version 0.3.3.10 - 2018-09-10
8393 Tor 0.3.3.10 backports numerous fixes from later versions of Tor.
8395 o Minor features (bug workaround, backport from 0.3.4.7-rc):
8396 - Compile correctly on systems that provide the C11 stdatomic.h
8397 header, but where C11 atomic functions don't actually compile.
8398 Closes ticket 26779; workaround for Debian issue 903709.
8400 o Minor features (compatibility, backport from 0.3.4.8):
8401 - Tell OpenSSL to maintain backward compatibility with previous
8402 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
8403 ciphers are disabled by default. Closes ticket 27344.
8405 o Minor features (continuous integration, backport from 0.3.4.7-rc):
8406 - Backport Travis rust distcheck to 0.3.3. Closes ticket 24629.
8407 - Enable macOS builds in our Travis CI configuration. Closes
8409 - Install libcap-dev and libseccomp2-dev so these optional
8410 dependencies get tested on Travis CI. Closes ticket 26560.
8411 - Run asciidoc during Travis CI. Implements ticket 27087.
8412 - Use ccache in our Travis CI configuration. Closes ticket 26952.
8414 o Minor features (continuous integration, rust, backport from 0.3.4.7-rc):
8415 - Use cargo cache in our Travis CI configuration. Closes
8418 o Minor features (controller, backport from 0.3.4.6-rc):
8419 - The control port now exposes the list of HTTPTunnelPorts and
8420 ExtOrPorts via GETINFO net/listeners/httptunnel and
8421 net/listeners/extor respectively. Closes ticket 26647.
8423 o Minor features (directory authorities, backport from 0.3.4.7-rc):
8424 - Authorities no longer vote to make the subprotocol version
8425 "LinkAuth=1" a requirement: it is unsupportable with NSS, and
8426 hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
8428 o Minor features (geoip):
8429 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
8430 Country database. Closes ticket 27089.
8432 o Minor bugfixes (compilation, backport from 0.3.4.6-rc):
8433 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
8434 tell the compiler not to include the system malloc implementation.
8435 Fixes bug 20424; bugfix on 0.2.0.20-rc.
8436 - Don't try to use a pragma to temporarily disable the
8437 -Wunused-const-variable warning if the compiler doesn't support
8438 it. Fixes bug 26785; bugfix on 0.3.2.11.
8440 o Minor bugfixes (compilation, backport from 0.3.4.7-rc):
8441 - Silence a spurious compiler warning on the GetAdaptersAddresses
8442 function pointer cast. This issue is already fixed by 26481 in
8443 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
8444 bugfix on 0.2.3.11-alpha.
8445 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
8446 supported, and always fails. Some compilers warn about the
8447 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
8450 o Minor bugfixes (compilation, windows, backport from 0.3.4.7-rc):
8451 - Don't link or search for pthreads when building for Windows, even
8452 if we are using build environment (like mingw) that provides a
8453 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
8455 o Minor bugfixes (continuous integration, backport from 0.3.4.6-rc):
8456 - Skip a pair of unreliable key generation tests on Windows, until
8457 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
8458 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
8460 o Minor bugfixes (continuous integration, backport from 0.3.4.7-rc):
8461 - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
8462 - Pass the module flags to distcheck configure, and log the flags
8463 before running configure. (Backported to 0.2.9 and later as a
8464 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
8466 o Minor bugfixes (continuous integration, backport from 0.3.4.8):
8467 - When a Travis build fails, and showing a log fails, keep trying to
8468 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
8469 - When we use echo in Travis, don't pass a --flag as the first
8470 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
8472 o Minor bugfixes (directory authority, backport from 0.3.4.6-rc):
8473 - When voting for recommended versions, make sure that all of the
8474 versions are well-formed and parsable. Fixes bug 26485; bugfix
8477 o Minor bugfixes (in-process restart, backport from 0.3.4.7-rc):
8478 - Always call tor_free_all() when leaving tor_run_main(). When we
8479 did not, restarting tor in-process would cause an assertion
8480 failure. Fixes bug 26948; bugfix on 0.3.3.1-alpha.
8482 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.4.7-rc):
8483 - Fix a bug in our sandboxing rules for the openat() syscall.
8484 Previously, no openat() call would be permitted, which would break
8485 filesystem operations on recent glibc versions. Fixes bug 25440;
8486 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
8488 o Minor bugfixes (logging, backport from 0.3.4.6-rc):
8489 - Improve the log message when connection initiators fail to
8490 authenticate direct connections to relays. Fixes bug 26927; bugfix
8493 o Minor bugfixes (onion services, backport from 0.3.4.7-rc):
8494 - Fix bug that causes services to not ever rotate their descriptors
8495 if they were getting SIGHUPed often. Fixes bug 26932; bugfix
8498 o Minor bugfixes (onion services, backport from 0.3.4.8):
8499 - Silence a spurious compiler warning in
8500 rend_client_send_introduction(). Fixes bug 27463; bugfix
8503 o Minor bugfixes (portability, backport from 0.3.4.6-rc):
8504 - Work around two different bugs in the OS X 10.10 and later SDKs
8505 that would prevent us from successfully targeting earlier versions
8506 of OS X. Fixes bug 26876; bugfix on 0.3.3.1-alpha.
8508 o Minor bugfixes (portability, backport from 0.3.4.7-rc):
8509 - Fix compilation of the unit tests on GNU/Hurd, which does not
8510 define PATH_MAX. Fixes bug 26873; bugfix on 0.3.3.1-alpha. Patch
8513 o Minor bugfixes (rust, backport from 0.3.4.7-rc):
8514 - Backport test_rust.sh from master. Fixes bug 26497; bugfix
8516 - Consistently use ../../.. as a fallback for $abs_top_srcdir in
8517 test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha.
8518 - Protover parsing was accepting the presence of whitespace in
8519 version strings, which the C implementation would choke on, e.g.
8520 "Desc=1\t,2". Fixes bug 27177; bugfix on 0.3.3.5-rc.
8521 - Protover parsing was ignoring a 2nd hyphen and everything after
8522 it, accepting entries like "Link=1-5-foo". Fixes bug 27164; bugfix
8524 - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or
8525 $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha.
8526 - cd to ${abs_top_builddir}/src/rust before running cargo in
8527 src/test/test_rust.sh. This makes the working directory consistent
8528 between builds and tests. Fixes bug 26497; bugfix on 0.3.3.2-alpha.
8530 o Minor bugfixes (single onion services, Tor2web, backport from 0.3.4.6-rc):
8531 - Log a protocol warning when single onion services or Tor2web clients
8532 fail to authenticate direct connections to relays.
8533 Fixes bug 26924; bugfix on 0.2.9.1-alpha.
8535 o Minor bugfixes (testing, backport from 0.3.4.6-rc):
8536 - Disable core dumps in test_bt.sh, to avoid failures in "make
8537 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
8539 o Minor bugfixes (testing, chutney, backport from 0.3.4.8):
8540 - When running make test-network-all, use the mixed+hs-v2 network.
8541 (A previous fix to chutney removed v3 onion services from the
8542 mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
8543 confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
8544 - Before running make test-network-all, delete old logs and test
8545 result files, to avoid spurious failures. Fixes bug 27295; bugfix
8548 o Minor bugfixes (testing, openssl compatibility, backport from 0.3.4.7-rc):
8549 - Our "tortls/cert_matches_key" unit test no longer relies on
8550 OpenSSL internals. Previously, it relied on unsupported OpenSSL
8551 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
8552 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
8554 o Minor bugfixes (v3 onion services, backport from 0.3.4.6-rc):
8555 - Stop sending ed25519 link specifiers in v3 onion service introduce
8556 cells and descriptors, when the rendezvous or introduction point
8557 doesn't support ed25519 link authentication. Fixes bug 26627;
8558 bugfix on 0.3.2.4-alpha.
8560 o Minor bugfixes (Windows, compilation, backport from 0.3.4.7-rc):
8561 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
8562 27185; bugfix on 0.2.2.2-alpha.
8565 Changes in version 0.3.4.8 - 2018-09-10
8566 Tor 0.3.4.8 is the first stable release in its series; it includes
8567 compilation and portability fixes.
8569 The Tor 0.3.4 series includes improvements for running Tor in
8570 low-power and embedded environments, which should help performance in
8571 general. We've begun work on better modularity, and included preliminary
8572 changes on the directory authority side to accommodate a new bandwidth
8573 measurement system. We've also integrated more continuous-integration
8574 systems into our development process, and made corresponding changes to
8575 Tor's testing infrastructure. Finally, we've continued to refine
8576 our anti-denial-of-service code.
8578 Below are the changes since 0.3.4.7-rc. For a complete list of changes
8579 since 0.3.3.9, see the ReleaseNotes file.
8581 o Minor features (compatibility):
8582 - Tell OpenSSL to maintain backward compatibility with previous
8583 RSA1024/DH1024 users in Tor. With OpenSSL 1.1.1-pre6, these
8584 ciphers are disabled by default. Closes ticket 27344.
8586 o Minor features (continuous integration):
8587 - Log the compiler path and version during Appveyor builds.
8588 Implements ticket 27449.
8589 - Show config.log and test-suite.log after failed Appveyor builds.
8590 Also upload the zipped full logs as a build artifact. Implements
8593 o Minor bugfixes (compilation):
8594 - Silence a spurious compiler warning on the GetAdaptersAddresses
8595 function pointer cast. This issue is already fixed by 26481 in
8596 0.3.5 and later, by removing the lookup and cast. Fixes bug 27465;
8597 bugfix on 0.2.3.11-alpha.
8598 - Stop calling SetProcessDEPPolicy() on 64-bit Windows. It is not
8599 supported, and always fails. Some compilers warn about the
8600 function pointer cast on 64-bit Windows. Fixes bug 27461; bugfix
8603 o Minor bugfixes (continuous integration):
8604 - Disable gcc hardening in Appveyor Windows 64-bit builds. As of
8605 August 29 2018, Appveyor images come with gcc 8.2.0 by default.
8606 Executables compiled for 64-bit Windows with this version of gcc
8607 crash when Tor's --enable-gcc-hardening flag is set. Fixes bug
8608 27460; bugfix on 0.3.4.1-alpha.
8609 - When a Travis build fails, and showing a log fails, keep trying to
8610 show the other logs. Fixes bug 27453; bugfix on 0.3.4.7-rc.
8611 - When we use echo in Travis, don't pass a --flag as the first
8612 argument. Fixes bug 27418; bugfix on 0.3.4.7-rc.
8614 o Minor bugfixes (onion services):
8615 - Silence a spurious compiler warning in
8616 rend_client_send_introduction(). Fixes bug 27463; bugfix
8619 o Minor bugfixes (testing, chutney):
8620 - When running make test-network-all, use the mixed+hs-v2 network.
8621 (A previous fix to chutney removed v3 onion services from the
8622 mixed+hs-v23 network, so seeing "mixed+hs-v23" in tests is
8623 confusing.) Fixes bug 27345; bugfix on 0.3.2.1-alpha.
8624 - Before running make test-network-all, delete old logs and test
8625 result files, to avoid spurious failures. Fixes bug 27295; bugfix
8628 Changes in version 0.3.4.7-rc - 2018-08-24
8629 Tor 0.3.4.7-rc fixes several small compilation, portability, and
8630 correctness issues in previous versions of Tor. This version is a
8631 release candidate: if no serious bugs are found, we expect that the
8632 stable 0.3.4 release will be (almost) the same as this release.
8634 o Minor features (bug workaround):
8635 - Compile correctly on systems that provide the C11 stdatomic.h
8636 header, but where C11 atomic functions don't actually compile.
8637 Closes ticket 26779; workaround for Debian issue 903709.
8639 o Minor features (continuous integration):
8640 - Backport Travis rust distcheck to 0.3.3. Closes ticket 24629.
8641 - Enable macOS builds in our Travis CI configuration. Closes
8643 - Install libcap-dev and libseccomp2-dev so these optional
8644 dependencies get tested on Travis CI. Closes ticket 26560.
8645 - Only post Appveyor IRC notifications when the build fails.
8646 Implements ticket 27275.
8647 - Run asciidoc during Travis CI. Implements ticket 27087.
8648 - Use ccache in our Travis CI configuration. Closes ticket 26952.
8650 o Minor features (continuous integration, rust):
8651 - Use cargo cache in our Travis CI configuration. Closes
8654 o Minor features (directory authorities):
8655 - Authorities no longer vote to make the subprotocol version
8656 "LinkAuth=1" a requirement: it is unsupportable with NSS, and
8657 hasn't been needed since Tor 0.3.0.1-alpha. Closes ticket 27286.
8659 o Minor features (geoip):
8660 - Update geoip and geoip6 to the August 7 2018 Maxmind GeoLite2
8661 Country database. Closes ticket 27089.
8663 o Minor bugfixes (compilation, windows):
8664 - Don't link or search for pthreads when building for Windows, even
8665 if we are using build environment (like mingw) that provides a
8666 pthreads library. Fixes bug 27081; bugfix on 0.1.0.1-rc.
8668 o Minor bugfixes (continuous integration):
8669 - Improve Appveyor CI IRC logging. Generate correct branches and
8670 URLs for pull requests and tags. Use unambiguous short commits.
8671 Fixes bug 26979; bugfix on master.
8672 - Build with zstd on macOS. Fixes bug 27090; bugfix on 0.3.1.5-alpha.
8673 - Pass the module flags to distcheck configure, and log the flags
8674 before running configure. (Backported to 0.2.9 and later as a
8675 precaution.) Fixes bug 27088; bugfix on 0.3.4.1-alpha.
8677 o Minor bugfixes (in-process restart):
8678 - Always call tor_free_all() when leaving tor_run_main(). When we
8679 did not, restarting tor in-process would cause an assertion
8680 failure. Fixes bug 26948; bugfix on 0.3.3.1-alpha.
8682 o Minor bugfixes (linux seccomp2 sandbox):
8683 - Fix a bug in out sandboxing rules for the openat() syscall.
8684 Previously, no openat() call would be permitted, which would break
8685 filesystem operations on recent glibc versions. Fixes bug 25440;
8686 bugfix on 0.2.9.15. Diagnosis and patch from Daniel Pinto.
8688 o Minor bugfixes (onion services):
8689 - Fix bug that causes services to not ever rotate their descriptors
8690 if they were getting SIGHUPed often. Fixes bug 26932; bugfix
8693 o Minor bugfixes (portability):
8694 - Fix compilation of the unit tests on GNU/Hurd, which does not
8695 define PATH_MAX. Fixes bug 26873; bugfix on 0.3.3.1-alpha. Patch
8698 o Minor bugfixes (rust):
8699 - Backport test_rust.sh from master. Fixes bug 26497; bugfix
8701 - Consistently use ../../.. as a fallback for $abs_top_srcdir in
8702 test_rust.sh. Fixes bug 27093; bugfix on 0.3.4.3-alpha.
8703 - Protover parsing was accepting the presence of whitespace in
8704 version strings, which the C implementation would choke on, e.g.
8705 "Desc=1\t,2". Fixes bug 27177; bugfix on 0.3.3.5-rc.
8706 - Protover parsing was ignoring a 2nd hyphen and everything after
8707 it, accepting entries like "Link=1-5-foo". Fixes bug 27164; bugfix
8709 - Stop setting $CARGO_HOME. cargo will use the user's $CARGO_HOME, or
8710 $HOME/.cargo by default. Fixes bug 26497; bugfix on 0.3.1.5-alpha.
8711 - cd to ${abs_top_builddir}/src/rust before running cargo in
8712 src/test/test_rust.sh. This makes the working directory consistent
8713 between builds and tests. Fixes bug 26497; bugfix on 0.3.3.2-alpha.
8715 o Minor bugfixes (testing, bootstrap):
8716 - When calculating bootstrap progress, check exit policies and the
8717 exit flag. Previously, Tor would only check the exit flag, which
8718 caused race conditions in small and fast networks like chutney.
8719 Fixes bug 27236; bugfix on 0.2.6.3-alpha.
8721 o Minor bugfixes (testing, openssl compatibility):
8722 - Our "tortls/cert_matches_key" unit test no longer relies on
8723 OpenSSL internals. Previously, it relied on unsupported OpenSSL
8724 behavior in a way that caused it to crash with OpenSSL 1.0.2p.
8725 Fixes bug 27226; bugfix on 0.2.5.1-alpha.
8727 o Minor bugfixes (Windows, compilation):
8728 - Silence a compilation warning on MSVC 2017 and clang-cl. Fixes bug
8729 27185; bugfix on 0.2.2.2-alpha.
8732 Changes in version 0.3.4.6-rc - 2018-08-06
8733 Tor 0.3.4.6-rc fixes several small compilation, portability, and
8734 correctness issues in previous versions of Tor. This version is a
8735 release candidate: if no serious bugs are found, we expect that the
8736 stable 0.3.4 release will be (almost) the same as this release.
8738 o Major bugfixes (event scheduler):
8739 - When we enable a periodic event, schedule it in the event loop
8740 rather than running it immediately. Previously, we would re-run
8741 periodic events immediately in the middle of (for example)
8742 changing our options, with unpredictable effects. Fixes bug 27003;
8743 bugfix on 0.3.4.1-alpha.
8745 o Minor features (compilation):
8746 - When building Tor, prefer to use Python 3 over Python 2, and more
8747 recent (contemplated) versions over older ones. Closes
8749 - When compiling with --enable-openbsd-malloc or --enable-tcmalloc,
8750 tell the compiler not to include the system malloc implementation.
8751 Fixes bug 20424; bugfix on 0.2.0.20-rc.
8752 - Don't try to use a pragma to temporarily disable the
8753 -Wunused-const-variable warning if the compiler doesn't support
8754 it. Fixes bug 26785; bugfix on 0.3.2.11.
8756 o Minor bugfixes (continuous integration):
8757 - Skip a pair of unreliable key generation tests on Windows, until
8758 the underlying issue in bug 26076 is resolved. Fixes bug 26830 and
8759 bug 26853; bugfix on 0.2.7.3-rc and 0.3.2.1-alpha respectively.
8761 o Minor features (controller):
8762 - The control port now exposes the list of HTTPTunnelPorts and
8763 ExtOrPorts via GETINFO net/listeners/httptunnel and
8764 net/listeners/extor respectively. Closes ticket 26647.
8766 o Minor bugfixes (directory authority):
8767 - When voting for recommended versions, make sure that all of the
8768 versions are well-formed and parsable. Fixes bug 26485; bugfix
8771 o Minor features (geoip):
8772 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
8773 Country database. Closes ticket 26674.
8775 o Minor features (Rust, portability):
8776 - Rust cross-compilation is now supported. Closes ticket 25895.
8778 o Minor bugfixes (compilation):
8779 - Update build system so that tor builds again with --disable-unittests
8780 after recent refactoring. Fixes bug 26789; bugfix on 0.3.4.3-alpha.
8781 - Fix a compilation warning on some versions of GCC when building
8782 code that calls routerinfo_get_my_routerinfo() twice, assuming
8783 that the second call will succeed if the first one did. Fixes bug
8784 26269; bugfix on 0.2.8.2-alpha.
8786 o Minor bugfixes (controller):
8787 - Report the port correctly when a port is configured to bind to
8788 "auto". Fixes bug 26568; bugfix on 0.3.4.1-alpha.
8789 - Parse the "HSADDRESS=" parameter in HSPOST commands properly.
8790 Previously, it was misparsed and ignored. Fixes bug 26523; bugfix
8791 on 0.3.3.1-alpha. Patch by "akwizgran".
8793 o Minor bugfixes (correctness, flow control):
8794 - Upon receiving a stream-level SENDME cell, verify that our window
8795 has not grown too large. Fixes bug 26214; bugfix on svn
8798 o Minor bugfixes (memory, correctness):
8799 - Fix a number of small memory leaks identified by coverity. Fixes
8800 bug 26467; bugfix on numerous Tor versions.
8802 o Minor bugfixes (logging):
8803 - Improve the log message when connection initiators fail to
8804 authenticate direct connections to relays. Fixes bug 26927; bugfix
8807 o Minor bugfixes (portability):
8808 - Avoid a compilation error in test_bwmgt.c on Solaris 10. Fixes bug
8809 26994; bugfix on 0.3.4.1-alpha.
8810 - Work around two different bugs in the OS X 10.10 and later SDKs
8811 that would prevent us from successfully targeting earlier versions
8812 of OS X. Fixes bug 26876; bugfix on 0.3.3.1-alpha.
8814 o Minor bugfixes (single onion services, Tor2web):
8815 - Log a protocol warning when single onion services or Tor2web
8816 clients fail to authenticate direct connections to relays. Fixes
8817 bug 26924; bugfix on 0.2.9.1-alpha.
8819 o Minor bugfixes (testing):
8820 - Disable core dumps in test_bt.sh, to avoid failures in "make
8821 distcheck". Fixes bug 26787; bugfix on 0.2.5.2-alpha.
8823 o Minor bugfixes (testing, compatibility):
8824 - When running the ntor_ref.py and hs_ntor_ref.py tests, make sure
8825 only to pass strings (rather than "bytes" objects) to the Python
8826 subprocess module. Python 3 on Windows seems to require this.
8827 Fixes bug 26535; bugfix on 0.2.5.5-alpha (for ntor_ref.py) and
8828 0.3.1.1-alpha (for hs_ntor_ref.py).
8830 o Minor bugfixes (v3 onion services):
8831 - Stop sending ed25519 link specifiers in v3 onion service introduce
8832 cells and descriptors, when the rendezvous or introduction point
8833 doesn't support ed25519 link authentication. Fixes bug 26627;
8834 bugfix on 0.3.2.4-alpha.
8837 Changes in version 0.3.4.5-rc - 2018-07-13
8838 Tor 0.3.4.5-rc moves to a new bridge authority, meaning people running
8839 bridge relays should upgrade.
8841 o Directory authority changes:
8842 - The "Bifroest" bridge authority has been retired; the new bridge
8843 authority is "Serge", and it is operated by George from the
8844 TorBSD project. Closes ticket 26771.
8847 Changes in version 0.3.3.9 - 2018-07-13
8848 Tor 0.3.3.9 moves to a new bridge authority, meaning people running
8849 bridge relays should upgrade.
8851 o Directory authority changes:
8852 - The "Bifroest" bridge authority has been retired; the new bridge
8853 authority is "Serge", and it is operated by George from the
8854 TorBSD project. Closes ticket 26771.
8857 Changes in version 0.3.2.11 - 2018-07-13
8858 Tor 0.3.2.11 moves to a new bridge authority, meaning people running
8859 bridge relays should upgrade. We also take this opportunity to backport
8862 o Directory authority changes:
8863 - The "Bifroest" bridge authority has been retired; the new bridge
8864 authority is "Serge", and it is operated by George from the
8865 TorBSD project. Closes ticket 26771.
8867 o Directory authority changes (backport from 0.3.3.7):
8868 - Add an IPv6 address for the "dannenberg" directory authority.
8869 Closes ticket 26343.
8871 o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha):
8872 - When directory authorities read a zero-byte bandwidth file, they
8873 would previously log a warning with the contents of an
8874 uninitialised buffer. They now log a warning about the empty file
8875 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
8877 o Major bugfixes (onion service, backport from 0.3.4.1-alpha):
8878 - Correctly detect when onion services get disabled after HUP. Fixes
8879 bug 25761; bugfix on 0.3.2.1.
8881 o Minor features (sandbox, backport from 0.3.3.4-alpha):
8882 - Explicitly permit the poll() system call when the Linux
8883 seccomp2-based sandbox is enabled: apparently, some versions of
8884 libc use poll() when calling getpwnam(). Closes ticket 25313.
8886 o Minor feature (continuous integration, backport from 0.3.3.5-rc):
8887 - Update the Travis CI configuration to use the stable Rust channel,
8888 now that we have decided to require that. Closes ticket 25714.
8890 o Minor features (continuous integration, backport from 0.3.4.1-alpha):
8891 - Our .travis.yml configuration now includes support for testing the
8892 results of "make distcheck". (It's not uncommon for "make check"
8893 to pass but "make distcheck" to fail.) Closes ticket 25814.
8894 - Our Travis CI configuration now integrates with the Coveralls
8895 coverage analysis tool. Closes ticket 25818.
8897 o Minor features (relay, diagnostic, backport from 0.3.4.3-alpha):
8898 - Add several checks to detect whether Tor relays are uploading
8899 their descriptors without specifying why they regenerated them.
8900 Diagnostic for ticket 25686.
8902 o Minor features (compilation, backport from 0.3.4.4-rc):
8903 - When building Tor, prefer to use Python 3 over Python 2, and more
8904 recent (contemplated) versions over older ones. Closes
8907 o Minor features (geoip):
8908 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
8909 Country database. Closes ticket 26674.
8911 o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha):
8912 - Upon receiving a malformed connected cell, stop processing the
8913 cell immediately. Previously we would mark the connection for
8914 close, but continue processing the cell as if the connection were
8915 open. Fixes bug 26072; bugfix on 0.2.4.7-alpha.
8917 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha):
8918 - Allow the nanosleep() system call, which glibc uses to implement
8919 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
8921 o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc):
8922 - When running the hs_ntor_ref.py test, make sure only to pass
8923 strings (rather than "bytes" objects) to the Python subprocess
8924 module. Python 3 on Windows seems to require this. Fixes bug
8925 26535; bugfix on 0.3.1.1-alpha.
8926 - When running the ntor_ref.py test, make sure only to pass strings
8927 (rather than "bytes" objects) to the Python subprocess module.
8928 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
8931 o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha):
8932 - Work around a change in OpenSSL 1.1.1 where return values that
8933 would previously indicate "no password" now indicate an empty
8934 password. Without this workaround, Tor instances running with
8935 OpenSSL 1.1.1 would accept descriptors that other Tor instances
8936 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
8938 o Minor bugfixes (documentation, backport from 0.3.3.5-rc):
8939 - Document that the PerConnBW{Rate,Burst} options will fall back to
8940 their corresponding consensus parameters only if those parameters
8941 are set. Previously we had claimed that these values would always
8942 be set in the consensus. Fixes bug 25296; bugfix on 0.2.2.7-alpha.
8944 o Minor bugfixes (compilation, backport from 0.3.4.4-rc):
8945 - Fix a compilation warning on some versions of GCC when building
8946 code that calls routerinfo_get_my_routerinfo() twice, assuming
8947 that the second call will succeed if the first one did. Fixes bug
8948 26269; bugfix on 0.2.8.2-alpha.
8950 o Minor bugfixes (client, backport from 0.3.4.1-alpha):
8951 - Don't consider Tor running as a client if the ControlPort is open,
8952 but no actual client ports are open. Fixes bug 26062; bugfix
8955 o Minor bugfixes (hardening, backport from 0.3.4.2-alpha):
8956 - Prevent a possible out-of-bounds smartlist read in
8957 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
8959 o Minor bugfixes (C correctness, backport from 0.3.3.4-alpha):
8960 - Fix a very unlikely (impossible, we believe) null pointer
8961 dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by
8962 Coverity; this is CID 1430932.
8964 o Minor bugfixes (onion service, backport from 0.3.4.1-alpha):
8965 - Fix a memory leak when a v3 onion service is configured and gets a
8966 SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha.
8967 - When parsing the descriptor signature, look for the token plus an
8968 extra white-space at the end. This is more correct but also will
8969 allow us to support new fields that might start with "signature".
8970 Fixes bug 26069; bugfix on 0.3.0.1-alpha.
8972 o Minor bugfixes (relay, backport from 0.3.4.3-alpha):
8973 - Relays now correctly block attempts to re-extend to the previous
8974 relay by Ed25519 identity. Previously they would warn in this
8975 case, but not actually reject the attempt. Fixes bug 26158; bugfix
8978 o Minor bugfixes (relay, crash, backport from 0.3.4.1-alpha):
8979 - Avoid a crash when running with DirPort set but ORPort turned off.
8980 Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha.
8982 o Minor bugfixes (compilation, backport from 0.3.4.2-alpha):
8983 - Silence unused-const-variable warnings in zstd.h with some GCC
8984 versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha.
8986 o Minor bugfixes (testing, backport from 0.3.3.4-alpha):
8987 - Avoid intermittent test failures due to a test that had relied on
8988 onion service introduction point creation finishing within 5
8989 seconds of real clock time. Fixes bug 25450; bugfix
8992 o Minor bugfixes (compilation, backport from 0.3.3.4-alpha):
8993 - Fix a C99 compliance issue in our configuration script that caused
8994 compilation issues when compiling Tor with certain versions of
8995 xtools. Fixes bug 25474; bugfix on 0.3.2.5-alpha.
8997 o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc):
8998 - Fix a number of small memory leaks identified by coverity. Fixes
8999 bug 26467; bugfix on numerous Tor versions.
9001 o Code simplification and refactoring (backport from 0.3.3.5-rc):
9002 - Move the list of default directory authorities to its own file.
9003 Closes ticket 24854. Patch by "beastr0".
9006 Changes in version 0.2.9.16 - 2018-07-13
9007 Tor 0.2.9.16 moves to a new bridge authority, meaning people running
9008 bridge relays should upgrade. We also take this opportunity to backport
9011 o Directory authority changes:
9012 - The "Bifroest" bridge authority has been retired; the new bridge
9013 authority is "Serge", and it is operated by George from the
9014 TorBSD project. Closes ticket 26771.
9016 o Directory authority changes (backport from 0.3.3.7):
9017 - Add an IPv6 address for the "dannenberg" directory authority.
9018 Closes ticket 26343.
9020 o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha):
9021 - When directory authorities read a zero-byte bandwidth file, they
9022 would previously log a warning with the contents of an
9023 uninitialised buffer. They now log a warning about the empty file
9024 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
9026 o Minor features (sandbox, backport from 0.3.3.4-alpha):
9027 - Explicitly permit the poll() system call when the Linux
9028 seccomp2-based sandbox is enabled: apparently, some versions of
9029 libc use poll() when calling getpwnam(). Closes ticket 25313.
9031 o Minor features (continuous integration, backport from 0.3.4.1-alpha):
9032 - Our .travis.yml configuration now includes support for testing the
9033 results of "make distcheck". (It's not uncommon for "make check"
9034 to pass but "make distcheck" to fail.) Closes ticket 25814.
9035 - Our Travis CI configuration now integrates with the Coveralls
9036 coverage analysis tool. Closes ticket 25818.
9038 o Minor features (compilation, backport from 0.3.4.4-rc):
9039 - When building Tor, prefer to use Python 3 over Python 2, and more
9040 recent (contemplated) versions over older ones. Closes
9043 o Minor features (geoip):
9044 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
9045 Country database. Closes ticket 26674.
9047 o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha):
9048 - Upon receiving a malformed connected cell, stop processing the
9049 cell immediately. Previously we would mark the connection for
9050 close, but continue processing the cell as if the connection were
9051 open. Fixes bug 26072; bugfix on 0.2.4.7-alpha.
9053 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha):
9054 - Allow the nanosleep() system call, which glibc uses to implement
9055 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
9057 o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc):
9058 - When running the ntor_ref.py test, make sure only to pass strings
9059 (rather than "bytes" objects) to the Python subprocess module.
9060 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
9063 o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha):
9064 - Work around a change in OpenSSL 1.1.1 where return values that
9065 would previously indicate "no password" now indicate an empty
9066 password. Without this workaround, Tor instances running with
9067 OpenSSL 1.1.1 would accept descriptors that other Tor instances
9068 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
9070 o Minor bugfixes (compilation, backport from 0.3.4.4-rc):
9071 - Fix a compilation warning on some versions of GCC when building
9072 code that calls routerinfo_get_my_routerinfo() twice, assuming
9073 that the second call will succeed if the first one did. Fixes bug
9074 26269; bugfix on 0.2.8.2-alpha.
9076 o Minor bugfixes (client, backport from 0.3.4.1-alpha):
9077 - Don't consider Tor running as a client if the ControlPort is open,
9078 but no actual client ports are open. Fixes bug 26062; bugfix
9081 o Minor bugfixes (hardening, backport from 0.3.4.2-alpha):
9082 - Prevent a possible out-of-bounds smartlist read in
9083 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
9085 o Minor bugfixes (C correctness, backport from 0.3.3.4-alpha):
9086 - Fix a very unlikely (impossible, we believe) null pointer
9087 dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by
9088 Coverity; this is CID 1430932.
9090 o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc):
9091 - Fix a number of small memory leaks identified by coverity. Fixes
9092 bug 26467; bugfix on numerous Tor versions.
9094 o Code simplification and refactoring (backport from 0.3.3.5-rc):
9095 - Move the list of default directory authorities to its own file.
9096 Closes ticket 24854. Patch by "beastr0".
9099 Changes in version 0.3.4.4-rc - 2018-07-09
9100 Tor 0.3.4.4-rc fixes several small compilation, portability, and
9101 correctness issues in previous versions of Tor. This version is a
9102 release candidate: if no serious bugs are found, we expect that the
9103 stable 0.3.4 release will be (almost) the same as this release.
9105 o Minor features (compilation):
9106 - When building Tor, prefer to use Python 3 over Python 2, and more
9107 recent (contemplated) versions over older ones. Closes
9110 o Minor features (geoip):
9111 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
9112 Country database. Closes ticket 26674.
9114 o Minor features (Rust, portability):
9115 - Rust cross-compilation is now supported. Closes ticket 25895.
9117 o Minor bugfixes (compilation):
9118 - Fix a compilation warning on some versions of GCC when building
9119 code that calls routerinfo_get_my_routerinfo() twice, assuming
9120 that the second call will succeed if the first one did. Fixes bug
9121 26269; bugfix on 0.2.8.2-alpha.
9123 o Minor bugfixes (control port):
9124 - Report the port correctly when a port is configured to bind to
9125 "auto". Fixes bug 26568; bugfix on 0.3.4.1-alpha.
9126 - Handle the HSADDRESS= argument to the HSPOST command properly.
9127 (Previously, this argument was misparsed and thus ignored.) Fixes
9128 bug 26523; bugfix on 0.3.3.1-alpha. Patch by "akwizgran".
9130 o Minor bugfixes (correctness, flow control):
9131 - Upon receiving a stream-level SENDME cell, verify that our window
9132 has not grown too large. Fixes bug 26214; bugfix on svn
9135 o Minor bugfixes (memory, correctness):
9136 - Fix a number of small memory leaks identified by coverity. Fixes
9137 bug 26467; bugfix on numerous Tor versions.
9139 o Minor bugfixes (testing, compatibility):
9140 - When running the hs_ntor_ref.py test, make sure only to pass
9141 strings (rather than "bytes" objects) to the Python subprocess
9142 module. Python 3 on Windows seems to require this. Fixes bug
9143 26535; bugfix on 0.3.1.1-alpha.
9144 - When running the ntor_ref.py test, make sure only to pass strings
9145 (rather than "bytes" objects) to the Python subprocess module.
9146 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
9150 Changes in version 0.3.3.8 - 2018-07-09
9151 Tor 0.3.3.8 backports several changes from the 0.3.4.x series, including
9152 fixes for a memory leak affecting directory authorities.
9154 o Major bugfixes (directory authority, backport from 0.3.4.3-alpha):
9155 - Stop leaking memory on directory authorities when planning to
9156 vote. This bug was crashing authorities by exhausting their
9157 memory. Fixes bug 26435; bugfix on 0.3.3.6.
9159 o Major bugfixes (rust, testing, backport from 0.3.4.3-alpha):
9160 - Make sure that failing tests in Rust will actually cause the build
9161 to fail: previously, they were ignored. Fixes bug 26258; bugfix
9164 o Minor features (compilation, backport from 0.3.4.4-rc):
9165 - When building Tor, prefer to use Python 3 over Python 2, and more
9166 recent (contemplated) versions over older ones. Closes
9169 o Minor features (geoip):
9170 - Update geoip and geoip6 to the July 3 2018 Maxmind GeoLite2
9171 Country database. Closes ticket 26674.
9173 o Minor features (relay, diagnostic, backport from 0.3.4.3-alpha):
9174 - Add several checks to detect whether Tor relays are uploading
9175 their descriptors without specifying why they regenerated them.
9176 Diagnostic for ticket 25686.
9178 o Minor bugfixes (circuit path selection, backport from 0.3.4.1-alpha):
9179 - Don't count path selection failures as circuit build failures.
9180 This change should eliminate cases where Tor blames its guard or
9181 the network for situations like insufficient microdescriptors
9182 and/or overly restrictive torrc settings. Fixes bug 25705; bugfix
9185 o Minor bugfixes (compilation, backport from 0.3.4.4-rc):
9186 - Fix a compilation warning on some versions of GCC when building
9187 code that calls routerinfo_get_my_routerinfo() twice, assuming
9188 that the second call will succeed if the first one did. Fixes bug
9189 26269; bugfix on 0.2.8.2-alpha.
9191 o Minor bugfixes (control port, backport from 0.3.4.4-rc):
9192 - Handle the HSADDRESS= argument to the HSPOST command properly.
9193 (Previously, this argument was misparsed and thus ignored.) Fixes
9194 bug 26523; bugfix on 0.3.3.1-alpha. Patch by "akwizgran".
9196 o Minor bugfixes (memory, correctness, backport from 0.3.4.4-rc):
9197 - Fix a number of small memory leaks identified by coverity. Fixes
9198 bug 26467; bugfix on numerous Tor versions.
9200 o Minor bugfixes (relay, backport from 0.3.4.3-alpha):
9201 - Relays now correctly block attempts to re-extend to the previous
9202 relay by Ed25519 identity. Previously they would warn in this
9203 case, but not actually reject the attempt. Fixes bug 26158; bugfix
9206 o Minor bugfixes (restart-in-process, backport from 0.3.4.1-alpha):
9207 - When shutting down, Tor now clears all the flags in the control.c
9208 module. This should prevent a bug where authentication cookies are
9209 not generated on restart. Fixes bug 25512; bugfix on 0.3.3.1-alpha.
9211 o Minor bugfixes (testing, compatibility, backport from 0.3.4.4-rc):
9212 - When running the hs_ntor_ref.py test, make sure only to pass
9213 strings (rather than "bytes" objects) to the Python subprocess
9214 module. Python 3 on Windows seems to require this. Fixes bug
9215 26535; bugfix on 0.3.1.1-alpha.
9216 - When running the ntor_ref.py test, make sure only to pass strings
9217 (rather than "bytes" objects) to the Python subprocess module.
9218 Python 3 on Windows seems to require this. Fixes bug 26535; bugfix
9222 Changes in version 0.3.4.3-alpha - 2018-06-26
9223 Tor 0.3.4.3-alpha fixes several bugs in earlier versions, including
9224 one that was causing stability issues on directory authorities.
9226 o Major bugfixes (directory authority):
9227 - Stop leaking memory on directory authorities when planning to
9228 vote. This bug was crashing authorities by exhausting their
9229 memory. Fixes bug 26435; bugfix on 0.3.3.6.
9231 o Major bugfixes (rust, testing):
9232 - Make sure that failing tests in Rust will actually cause the build
9233 to fail: previously, they were ignored. Fixes bug 26258; bugfix
9236 o Minor feature (directory authorities):
9237 - Stop warning about incomplete bw lines before the first complete
9238 bw line has been found, so that additional header lines can be
9239 ignored. Fixes bug 25960; bugfix on 0.2.2.1-alpha
9241 o Minor features (relay, diagnostic):
9242 - Add several checks to detect whether Tor relays are uploading
9243 their descriptors without specifying why they regenerated them.
9244 Diagnostic for ticket 25686.
9246 o Minor features (unit tests):
9247 - Test complete bandwidth measurements files, and test that
9248 incomplete bandwidth lines only give warnings when the end of the
9249 header has not been detected. Fixes bug 25947; bugfix
9252 o Minor bugfixes (compilation):
9253 - Refrain from compiling unit testing related object files when
9254 --disable-unittests is set to configure script. Fixes bug 24891;
9255 bugfix on 0.2.5.1-alpha.
9256 - When linking the libtor_testing.a library, only include the
9257 dirauth object files once. Previously, they were getting added
9258 twice. Fixes bug 26402; bugfix on 0.3.4.1-alpha.
9259 - The --enable-fatal-warnings flag now affects Rust code as well.
9260 Closes ticket 26245.
9262 o Minor bugfixes (onion services):
9263 - Recompute some consensus information after detecting a clock jump,
9264 or after transitioning from a non-live consensus to a live
9265 consensus. We do this to avoid having an outdated state, and
9266 miscalculating the index for next-generation onion services. Fixes
9267 bug 24977; bugfix on 0.3.2.1-alpha.
9269 o Minor bugfixes (relay):
9270 - Relays now correctly block attempts to re-extend to the previous
9271 relay by Ed25519 identity. Previously they would warn in this
9272 case, but not actually reject the attempt. Fixes bug 26158; bugfix
9275 o Minor bugfixes (testing):
9276 - Fix compilation of the doctests in the Rust crypto crate. Fixes
9277 bug 26415; bugfix on 0.3.4.1-alpha.
9278 - Instead of trying to read the geoip configuration files from
9279 within the unit tests, instead create our own ersatz files with
9280 just enough geoip data in the format we expect. Trying to read
9281 from the source directory created problems on Windows with mingw,
9282 where the build system's paths are not the same as the platform's
9283 paths. Fixes bug 25787; bugfix on 0.3.4.1-alpha.
9284 - Refrain from trying to get an item from an empty smartlist in
9285 test_bridges_clear_bridge_list. Set DEBUG_SMARTLIST in unit tests
9286 to catch improper smartlist usage. Furthermore, enable
9287 DEBUG_SMARTLIST globally when build is configured with fragile
9288 hardening. Fixes bug 26196; bugfix on 0.3.4.1-alpha.
9291 Changes in version 0.3.3.7 - 2018-06-12
9292 Tor 0.3.3.7 backports several changes from the 0.3.4.x series, including
9293 fixes for bugs affecting compatibility and stability.
9295 o Directory authority changes:
9296 - Add an IPv6 address for the "dannenberg" directory authority.
9297 Closes ticket 26343.
9299 o Minor features (geoip):
9300 - Update geoip and geoip6 to the June 7 2018 Maxmind GeoLite2
9301 Country database. Closes ticket 26351.
9303 o Minor bugfixes (compatibility, openssl, backport from 0.3.4.2-alpha):
9304 - Work around a change in OpenSSL 1.1.1 where return values that
9305 would previously indicate "no password" now indicate an empty
9306 password. Without this workaround, Tor instances running with
9307 OpenSSL 1.1.1 would accept descriptors that other Tor instances
9308 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
9310 o Minor bugfixes (compilation, backport from 0.3.4.2-alpha):
9311 - Silence unused-const-variable warnings in zstd.h with some GCC
9312 versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha.
9314 o Minor bugfixes (controller, backport from 0.3.4.2-alpha):
9315 - Improve accuracy of the BUILDTIMEOUT_SET control port event's
9316 TIMEOUT_RATE and CLOSE_RATE fields. (We were previously
9317 miscounting the total number of circuits for these field values.)
9318 Fixes bug 26121; bugfix on 0.3.3.1-alpha.
9320 o Minor bugfixes (hardening, backport from 0.3.4.2-alpha):
9321 - Prevent a possible out-of-bounds smartlist read in
9322 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
9324 o Minor bugfixes (path selection, backport from 0.3.4.1-alpha):
9325 - Only select relays when they have the descriptors we prefer to use
9326 for them. This change fixes a bug where we could select a relay
9327 because it had _some_ descriptor, but reject it later with a
9328 nonfatal assertion error because it didn't have the exact one we
9329 wanted. Fixes bugs 25691 and 25692; bugfix on 0.3.3.4-alpha.
9332 Changes in version 0.3.4.2-alpha - 2018-06-12
9333 Tor 0.3.4.2-alpha fixes several minor bugs in the previous alpha
9334 release, and forward-ports an authority-only security fix from 0.3.3.6.
9336 o Directory authority changes:
9337 - Add an IPv6 address for the "dannenberg" directory authority.
9338 Closes ticket 26343.
9340 o Major bugfixes (security, directory authority, denial-of-service, also in 0.3.3.6):
9341 - Fix a bug that could have allowed an attacker to force a directory
9342 authority to use up all its RAM by passing it a maliciously
9343 crafted protocol versions string. Fixes bug 25517; bugfix on
9344 0.2.9.4-alpha. This issue is also tracked as TROVE-2018-005.
9346 o Minor features (continuous integration):
9347 - Add the necessary configuration files for continuous integration
9348 testing on Windows, via the Appveyor platform. Closes ticket
9349 25549. Patches from Marcin Cieślak and Isis Lovecruft.
9351 o Minor features (geoip):
9352 - Update geoip and geoip6 to the June 7 2018 Maxmind GeoLite2
9353 Country database. Closes ticket 26351.
9355 o Minor bugfixes (compatibility, openssl):
9356 - Work around a change in OpenSSL 1.1.1 where return values that
9357 would previously indicate "no password" now indicate an empty
9358 password. Without this workaround, Tor instances running with
9359 OpenSSL 1.1.1 would accept descriptors that other Tor instances
9360 would reject. Fixes bug 26116; bugfix on 0.2.5.16.
9362 o Minor bugfixes (compilation):
9363 - Silence unused-const-variable warnings in zstd.h with some GCC
9364 versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha.
9365 - Fix compilation when using OpenSSL 1.1.0 with the "no-deprecated"
9366 flag enabled. Fixes bug 26156; bugfix on 0.3.4.1-alpha.
9367 - Avoid a compiler warning when casting the return value of
9368 smartlist_len() to double with DEBUG_SMARTLIST enabled. Fixes bug
9369 26283; bugfix on 0.2.4.10-alpha.
9371 o Minor bugfixes (control port):
9372 - Do not count 0-length RELAY_COMMAND_DATA cells as valid data in
9373 CIRC_BW events. Previously, such cells were counted entirely in
9374 the OVERHEAD field. Now they are not. Fixes bug 26259; bugfix
9377 o Minor bugfixes (controller):
9378 - Improve accuracy of the BUILDTIMEOUT_SET control port event's
9379 TIMEOUT_RATE and CLOSE_RATE fields. (We were previously
9380 miscounting the total number of circuits for these field values.)
9381 Fixes bug 26121; bugfix on 0.3.3.1-alpha.
9383 o Minor bugfixes (hardening):
9384 - Prevent a possible out-of-bounds smartlist read in
9385 protover_compute_vote(). Fixes bug 26196; bugfix on 0.2.9.4-alpha.
9387 o Minor bugfixes (onion services):
9388 - Fix a bug that blocked the creation of ephemeral v3 onion
9389 services. Fixes bug 25939; bugfix on 0.3.4.1-alpha.
9391 o Minor bugfixes (test coverage tools):
9392 - Update our "cov-diff" script to handle output from the latest
9393 version of gcov, and to remove extraneous timestamp information
9394 from its output. Fixes bugs 26101 and 26102; bugfix
9398 Changes in version 0.3.3.6 - 2018-05-22
9399 Tor 0.3.3.6 is the first stable release in the 0.3.3 series. It
9400 backports several important fixes from the 0.3.4.1-alpha.
9402 The Tor 0.3.3 series includes controller support and other
9403 improvements for v3 onion services, official support for embedding Tor
9404 within other applications, and our first non-trivial module written in
9405 the Rust programming language. (Rust is still not enabled by default
9406 when building Tor.) And as usual, there are numerous other smaller
9407 bugfixes, features, and improvements.
9409 Below are the changes since 0.3.3.5-rc. For a list of all changes
9410 since 0.3.2.10, see the ReleaseNotes file.
9412 o Major bugfixes (directory authorities, security, backport from 0.3.4.1-alpha):
9413 - When directory authorities read a zero-byte bandwidth file, they
9414 would previously log a warning with the contents of an
9415 uninitialised buffer. They now log a warning about the empty file
9416 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
9418 o Major bugfixes (security, directory authority, denial-of-service):
9419 - Fix a bug that could have allowed an attacker to force a directory
9420 authority to use up all its RAM by passing it a maliciously
9421 crafted protocol versions string. Fixes bug 25517; bugfix on
9422 0.2.9.4-alpha. This issue is also tracked as TROVE-2018-005.
9424 o Major bugfixes (crash, backport from 0.3.4.1-alpha):
9425 - Avoid a rare assertion failure in the circuit build timeout code
9426 if we fail to allow any circuits to actually complete. Fixes bug
9427 25733; bugfix on 0.2.2.2-alpha.
9429 o Major bugfixes (directory authorities, backport from 0.3.4.1-alpha):
9430 - Avoid a crash when testing router reachability on a router that
9431 could have an ed25519 ID, but which does not. Fixes bug 25415;
9432 bugfix on 0.3.3.2-alpha.
9434 o Major bugfixes (onion service, backport from 0.3.4.1-alpha):
9435 - Correctly detect when onion services get disabled after HUP. Fixes
9436 bug 25761; bugfix on 0.3.2.1.
9438 o Major bugfixes (relay, denial of service, backport from 0.3.4.1-alpha):
9439 - Impose a limit on circuit cell queue size. The limit can be
9440 controlled by a consensus parameter. Fixes bug 25226; bugfix
9443 o Minor features (compatibility, backport from 0.3.4.1-alpha):
9444 - Avoid some compilation warnings with recent versions of LibreSSL.
9445 Closes ticket 26006.
9447 o Minor features (continuous integration, backport from 0.3.4.1-alpha):
9448 - Our .travis.yml configuration now includes support for testing the
9449 results of "make distcheck". (It's not uncommon for "make check"
9450 to pass but "make distcheck" to fail.) Closes ticket 25814.
9451 - Our Travis CI configuration now integrates with the Coveralls
9452 coverage analysis tool. Closes ticket 25818.
9454 o Minor features (geoip):
9455 - Update geoip and geoip6 to the May 1 2018 Maxmind GeoLite2 Country
9456 database. Closes ticket 26104.
9458 o Minor bugfixes (client, backport from 0.3.4.1-alpha):
9459 - Don't consider Tor running as a client if the ControlPort is open,
9460 but no actual client ports are open. Fixes bug 26062; bugfix
9463 o Minor bugfixes (correctness, client, backport from 0.3.4.1-alpha):
9464 - Upon receiving a malformed connected cell, stop processing the
9465 cell immediately. Previously we would mark the connection for
9466 close, but continue processing the cell as if the connection were
9467 open. Fixes bug 26072; bugfix on 0.2.4.7-alpha.
9469 o Minor bugfixes (documentation, backport from 0.3.4.1-alpha):
9470 - Stop saying in the manual that clients cache ipv4 dns answers from
9471 exit relays. We haven't used them since 0.2.6.3-alpha, and in
9472 ticket 24050 we stopped even caching them as of 0.3.2.6-alpha, but
9473 we forgot to say so in the man page. Fixes bug 26052; bugfix
9476 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.4.1-alpha):
9477 - Allow the nanosleep() system call, which glibc uses to implement
9478 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
9480 o Minor bugfixes (onion service, backport from 0.3.4.1-alpha):
9481 - Fix a memory leak when a v3 onion service is configured and gets a
9482 SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha.
9483 - When parsing the descriptor signature, look for the token plus an
9484 extra white-space at the end. This is more correct but also will
9485 allow us to support new fields that might start with "signature".
9486 Fixes bug 26069; bugfix on 0.3.0.1-alpha.
9488 o Minor bugfixes (relay, crash, backport from 0.3.4.1-alpha):
9489 - Avoid a crash when running with DirPort set but ORPort turned off.
9490 Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha.
9492 o Documentation (backport from 0.3.4.1-alpha):
9493 - Correct an IPv6 error in the documentation for ExitPolicy. Closes
9494 ticket 25857. Patch from "CTassisF".
9497 Changes in version 0.3.4.1-alpha - 2018-05-17
9498 Tor 0.3.4.1-alpha is the first release in the 0.3.4.x series. It
9499 includes refactoring to begin reducing Tor's binary size and idle CPU
9500 usage on mobile, along with prep work for new bandwidth scanners,
9501 improvements to the experimental "vanguards" feature, and numerous
9502 other small features and bugfixes.
9504 o New system requirements:
9505 - Tor no longer tries to support old operating systems without
9506 mmap() or some local equivalent. Apparently, compilation on such
9507 systems has been broken for some time, without anybody noticing or
9508 complaining. Closes ticket 25398.
9510 o Major feature (directory authority, modularization):
9511 - The directory authority subsystem has been modularized. The code
9512 is now located in src/or/dirauth/, and is compiled in by default.
9513 To disable the module, the configure option
9514 --disable-module-dirauth has been added. This module may be
9515 disabled by default in some future release. Closes ticket 25610.
9517 o Major features (main loop, CPU usage):
9518 - When Tor is disabled (via DisableNetwork or via hibernation), it
9519 no longer needs to run any per-second events. This change should
9520 make it easier for mobile applications to disable Tor while the
9521 device is sleeping, or Tor is not running. Closes ticket 26063.
9522 - Tor no longer enables all of its periodic events by default.
9523 Previously, Tor would enable all possible main loop events,
9524 regardless of whether it needed them. Furthermore, many of these
9525 events are now disabled with Tor is hibernating or DisableNetwork
9526 is set. This is a big step towards reducing client CPU usage by
9527 reducing the amount of wake-ups the daemon does. Closes ticket
9529 - The bandwidth-limitation logic has been refactored so that
9530 bandwidth calculations are performed on-demand, rather than every
9531 TokenBucketRefillInterval milliseconds. This change should improve
9532 the granularity of our bandwidth calculations, and limit the
9533 number of times that the Tor process needs to wake up when it is
9534 idle. Closes ticket 25373.
9535 - Move responsibility for many operations from a once-per-second
9536 callback to a callback that is only scheduled as needed. Moving
9537 this functionality has allowed us to disable the callback when
9538 Tor's network is disabled. Once enough items are removed from our
9539 once-per-second callback, we can eliminate it entirely to conserve
9540 CPU when idle. The functionality removed includes: closing
9541 connections, circuits, and channels (ticket 25932); consensus
9542 voting (25937); flushing log callbacks (25951); honoring delayed
9543 SIGNEWNYM requests (25949); rescanning the consensus cache
9544 (25931); saving the state file to disk (25948); warning relay
9545 operators about unreachable ports (25952); and keeping track of
9546 Tor's uptime (26009).
9548 o Major bugfixes (directory authorities, security):
9549 - When directory authorities read a zero-byte bandwidth file, they
9550 would previously log a warning with the contents of an
9551 uninitialised buffer. They now log a warning about the empty file
9552 instead. Fixes bug 26007; bugfix on 0.2.2.1-alpha.
9554 o Major bugfixes (crash):
9555 - Avoid a rare assertion failure in the circuit build timeout code
9556 if we fail to allow any circuits to actually complete. Fixes bug
9557 25733; bugfix on 0.2.2.2-alpha.
9559 o Major bugfixes (directory authority):
9560 - Avoid a crash when testing router reachability on a router that
9561 could have an ed25519 ID, but which does not. Fixes bug 25415;
9562 bugfix on 0.3.3.2-alpha.
9564 o Major bugfixes (onion service):
9565 - Correctly detect when onion services get disabled after HUP. Fixes
9566 bug 25761; bugfix on 0.3.2.1.
9568 o Major bugfixes (protover, voting):
9569 - Revise Rust implementation of protover to use a more memory-
9570 efficient voting algorithm and corresponding data structures, thus
9571 avoiding a potential (but small impact) DoS attack where specially
9572 crafted protocol strings would expand to several potential
9573 megabytes in memory. In the process, several portions of code were
9574 revised to be methods on new, custom types, rather than functions
9575 taking interchangeable types, thus increasing type safety of the
9576 module. Custom error types and handling were added as well, in
9577 order to facilitate better error dismissal/handling in outside
9578 crates and avoid mistakenly passing an internal error string to C
9579 over the FFI boundary. Many tests were added, and some previous
9580 differences between the C and Rust implementations have been
9581 remedied. Fixes bug 24031; bugfix on 0.3.3.1-alpha.
9583 o Major bugfixes (relay, denial of service):
9584 - Impose a limit on circuit cell queue size. The limit can be
9585 controlled by a consensus parameter. Fixes bug 25226; bugfix
9588 o Minor features (accounting):
9589 - When Tor becomes dormant, it now uses a scheduled event to wake up
9590 at the right time. Previously, we would use the per-second timer
9591 to check whether to wake up, but we no longer have any per-second
9592 timers enabled when the network is disabled. Closes ticket 26064.
9594 o Minor features (code quality):
9595 - Add optional spell-checking for the Tor codebase, using the
9596 "misspell" program. To use this feature, run "make check-typos".
9597 Closes ticket 25024.
9599 o Minor features (compatibility):
9600 - Tor now detects versions of OpenSSL 1.1.0 and later compiled with
9601 the no-deprecated option, and builds correctly with them. Closes
9602 tickets 19429, 19981, and 25353.
9603 - Avoid some compilation warnings with recent versions of LibreSSL.
9604 Closes ticket 26006.
9606 o Minor features (compression, zstd):
9607 - When running with zstd, Tor now considers using advanced functions
9608 that the zstd maintainers have labeled as potentially unstable. To
9609 prevent breakage, Tor will only use this functionality when the
9610 runtime version of the zstd library matches the version with which
9611 Tor was compiled. Closes ticket 25162.
9613 o Minor features (configuration):
9614 - The "DownloadSchedule" options have been renamed to end with
9615 "DownloadInitialDelay". The old names are still allowed, but will
9616 produce a warning. Comma-separated lists are still permitted for
9617 these options, but all values after the first are ignored (as they
9618 have been since 0.2.9). Closes ticket 23354.
9620 o Minor features (continuous integration):
9621 - Our .travis.yml configuration now includes support for testing the
9622 results of "make distcheck". (It's not uncommon for "make check"
9623 to pass but "make distcheck" to fail.) Closes ticket 25814.
9624 - Our Travis CI configuration now integrates with the Coveralls
9625 coverage analysis tool. Closes ticket 25818.
9627 o Minor features (control port):
9628 - Introduce GETINFO "current-time/{local,utc}" to return the local
9629 and UTC times respectively in ISO format. This helps a controller
9630 like Tor Browser detect a time-related error. Closes ticket 25511.
9631 Patch by Neel Chauhan.
9632 - Introduce new fields to the CIRC_BW event. There are two new
9633 fields in each of the read and written directions. The DELIVERED
9634 fields report the total valid data on the circuit, as measured by
9635 the payload sizes of verified and error-checked relay command
9636 cells. The OVERHEAD fields report the total unused bytes in each
9637 of these cells. Closes ticket 25903.
9639 o Minor features (directory authority):
9640 - Directory authorities now open their key-pinning files as O_SYNC,
9641 to limit their chances of accidentally writing partial lines.
9642 Closes ticket 23909.
9644 o Minor features (directory authority, forward compatibility):
9645 - Make the lines of the measured bandwidth file able to contain
9646 their entries in any order. Previously, the node_id entry needed
9647 to come first. Closes ticket 26004.
9649 o Minor features (entry guards):
9650 - Introduce a new torrc option NumPrimaryGuards for controlling the
9651 number of primary guards. Closes ticket 25843.
9653 o Minor features (geoip):
9654 - Update geoip and geoip6 to the May 1 2018 Maxmind GeoLite2 Country
9655 database. Closes ticket 26104.
9657 o Minor features (performance):
9658 - Avoid a needless call to malloc() when processing an incoming
9659 relay cell. Closes ticket 24914.
9660 - Make our timing-wheel code run a tiny bit faster on 32-bit
9661 platforms, by preferring 32-bit math to 64-bit. Closes
9663 - Avoid a needless malloc()/free() pair every time we handle an ntor
9664 handshake. Closes ticket 25150.
9666 o Minor features (testing):
9667 - Add a unit test for voting_schedule_get_start_of_next_interval().
9668 Closes ticket 26014, and helps make unit test coverage
9670 - A new unittests module specifically for testing the functions in
9671 the (new-ish) bridges.c module has been created with new
9672 unittests, raising the code coverage percentages. Closes 25425.
9673 - We now have improved testing for addressmap_get_virtual_address()
9674 function. This should improve our test coverage, and make our test
9675 coverage more deterministic. Closes ticket 25993.
9677 o Minor features (timekeeping, circuit scheduling):
9678 - When keeping track of how busy each circuit have been recently on
9679 a given connection, use coarse-grained monotonic timers rather
9680 than gettimeofday(). This change should marginally increase
9681 accuracy and performance. Implements part of ticket 25927.
9683 o Minor bugfixes (bandwidth management):
9684 - Consider ourselves "low on write bandwidth" if we have exhausted
9685 our write bandwidth some time in the last second. This was the
9686 documented behavior before, but the actual behavior was to change
9687 this value every TokenBucketRefillInterval. Fixes bug 25828;
9688 bugfix on 0.2.3.5-alpha.
9690 o Minor bugfixes (C correctness):
9691 - Add a missing lock acquisition in the shutdown code of the control
9692 subsystem. Fixes bug 25675; bugfix on 0.2.7.3-rc. Found by
9693 Coverity; this is CID 1433643.
9695 o Minor bugfixes (circuit path selection):
9696 - Don't count path selection failures as circuit build failures.
9697 This change should eliminate cases where Tor blames its guard or
9698 the network for situations like insufficient microdescriptors
9699 and/or overly restrictive torrc settings. Fixes bug 25705; bugfix
9702 o Minor bugfixes (client):
9703 - Don't consider Tor running as a client if the ControlPort is open,
9704 but no actual client ports are open. Fixes bug 26062; bugfix
9707 o Minor bugfixes (code style):
9708 - Fixed multiple includes of transports.h in src/or/connection.c
9709 Fixes bug 25261; bugfix on 0.2.5.1-alpha.
9710 - Remove the unused variable n_possible from the function
9711 channel_get_for_extend(). Fixes bug 25645; bugfix on 0.2.4.4-alpha
9713 o Minor bugfixes (control interface):
9714 - Respond with more human-readable error messages to GETINFO exit-
9715 policy/* requests. Also, let controller know if an error is
9716 transient (response code 551) or not (response code 552). Fixes
9717 bug 25852; bugfix on 0.2.8.1-alpha.
9719 o Minor bugfixes (controller):
9720 - Make CIRC_BW event reflect the total of all data sent on a
9721 circuit, including padding and dropped cells. Also fix a mis-
9722 counting bug when STREAM_BW events were enabled. Fixes bug 25400;
9723 bugfix on 0.2.5.2-alpha.
9725 o Minor bugfixes (correctness, client):
9726 - Upon receiving a malformed connected cell, stop processing the cell
9727 immediately. Previously we would mark the connection for close, but
9728 continue processing the cell as if the connection were open. Fixes bug
9729 26072; bugfix on 0.2.4.7-alpha.
9731 o Minor bugfixes (directory client):
9732 - When unverified-consensus is verified, rename it to cached-
9733 consenus. Fixes bug 4187; bugfix on 0.2.0.3-alpha.
9734 - Fixed launching a certificate fetch always during the scheduled
9735 periodic consensus fetch by fetching only in those cases when
9736 consensus are waiting for certs. Fixes bug 24740; bugfix
9739 o Minor bugfixes (documentation):
9740 - Stop saying in the manual that clients cache ipv4 dns answers from
9741 exit relays. We haven't used them since 0.2.6.3-alpha, and in
9742 ticket 24050 we stopped even caching them as of 0.3.2.6-alpha, but
9743 we forgot to say so in the man page. Fixes bug 26052; bugfix
9746 o Minor bugfixes (error reporting):
9747 - Improve tolerance for directory authorities with skewed clocks.
9748 Previously, an authority with a clock more than 60 seconds ahead
9749 could cause a client with a correct clock to warn that the
9750 client's clock was behind. Now the clocks of a majority of
9751 directory authorities have to be ahead of the client before this
9752 warning will occur. Fixes bug 25756; bugfix on 0.2.2.25-alpha.
9754 o Minor bugfixes (Linux seccomp2 sandbox):
9755 - Allow the nanosleep() system call, which glibc uses to implement
9756 sleep() and usleep(). Fixes bug 24969; bugfix on 0.2.5.1-alpha.
9758 o Minor bugfixes (onion service):
9759 - Fix a memory leak when a v3 onion service is configured and gets a
9760 SIGHUP signal. Fixes bug 25901; bugfix on 0.3.2.1-alpha.
9761 - When parsing the descriptor signature, look for the token plus an
9762 extra white-space at the end. This is more correct but also will
9763 allow us to support new fields that might start with "signature".
9764 Fixes bug 26069; bugfix on 0.3.0.1-alpha.
9766 o Minor bugfixes (path selection):
9767 - Only select relays when they have the descriptors we prefer to use
9768 for them. This change fixes a bug where we could select a relay
9769 because it had _some_ descriptor, but reject it later with a
9770 nonfatal assertion error because it didn't have the exact one we
9771 wanted. Fixes bugs 25691 and 25692; bugfix on 0.3.3.4-alpha.
9773 o Minor bugfixes (portability):
9774 - Do not align mmap length, as it is not required by POSIX, and the
9775 getpagesize function is deprecated. Fixes bug 25399; bugfix
9778 o Minor bugfixes (portability, FreeBSD):
9779 - In have_enough_mem_for_dircache(), the variable DIRCACHE_MIN_MEM_MB
9780 does not stringify on FreeBSD, so we switch to tor_asprintf().
9781 Fixes bug 20887; bugfix on 0.2.8.1-alpha. Patch by Neel Chauhan.
9783 o Minor bugfixes (relay statistics):
9784 - When a relay is collecting internal statistics about how many
9785 create cell requests it has seen of each type, accurately count
9786 the requests from relays that temporarily fall out of the
9787 consensus. (To be extra conservative, we were already ignoring
9788 requests from clients in our counts, and we continue ignoring them
9789 here.) Fixes bug 24910; bugfix on 0.2.4.17-rc.
9791 o Minor bugfixes (relay, crash):
9792 - Avoid a crash when running with DirPort set but ORPort turned off.
9793 Fixes a case of bug 23693; bugfix on 0.3.1.1-alpha.
9795 o Minor bugfixes (restart-in-process):
9796 - When shutting down, Tor now clears all the flags in the control.c
9797 module. This should prevent a bug where authentication cookies are
9798 not generated on restart. Fixes bug 25512; bugfix on 0.3.3.1-alpha.
9800 o Minor bugfixes (testing):
9801 - When testing workqueue event-cancellation, make sure that we
9802 actually cancel an event, and that cancel each event with equal
9803 probability. (It was previously possible, though extremely
9804 unlikely, for our event-canceling test not to cancel any events.)
9805 Fixes bug 26008; bugfix on 0.2.6.3-alpha.
9806 - Repeat part of the test in test_client_pick_intro() a number of
9807 times, to give it consistent coverage. Fixes bug 25996; bugfix
9809 - Remove randomness from the hs_common/responsible_hsdirs test, so
9810 that it always takes the same path through the function it tests.
9811 Fixes bug 25997; bugfix on 0.3.2.1-alpha.
9812 - Change the behavior of the "channel/outbound" test so that it
9813 never causes a 10-second rollover for the EWMA circuitmux code.
9814 Previously, this behavior would happen randomly, and result in
9815 fluctuating test coverage. Fixes bug 25994; bugfix
9817 - Use X509_new() to allocate certificates that will be freed later
9818 with X509_free(). Previously, some parts of the unit tests had
9819 used tor_malloc_zero(), which is incorrect, and which caused test
9820 failures on Windows when they were built with extra hardening.
9821 Fixes bugs 25943 and 25944; bugfix on 0.2.8.1-alpha. Patch by
9823 - While running the circuit_timeout test, fix the PRNG to a
9824 deterministic AES stream, so that the test coverage from this test
9825 will itself be deterministic. Fixes bug 25995; bugfix
9828 o Minor bugfixes (vanguards):
9829 - Allow the last hop in a vanguard circuit to be the same as our
9830 first, to prevent the adversary from influencing guard node choice
9831 by choice of last hop. Also prevent the creation of A - B - A
9832 paths, or A - A paths, which are forbidden by relays. Fixes bug
9833 25870; bugfix on 0.3.3.1-alpha.
9835 o Code simplification and refactoring:
9836 - Remove duplicate code in parse_{c,s}method_line and bootstrap
9837 their functionalities into a single function. Fixes bug 6236;
9838 bugfix on 0.2.3.6-alpha.
9839 - We remove the PortForwarding and PortForwardingHelper options,
9840 related functions, and the port_forwarding tests. These options
9841 were used by the now-deprecated Vidalia to help ordinary users
9842 become Tor relays or bridges. Closes ticket 25409. Patch by
9844 - In order to make the OR and dir checking function in router.c less
9845 confusing we renamed some functions and
9846 consider_testing_reachability() has been split into
9847 router_should_check_reachability() and
9848 router_do_reachability_checks(). Also we improved the documentation
9849 in some functions. Closes ticket 18918.
9850 - Initial work to isolate Libevent usage to a handful of modules in
9851 our codebase, to simplify our call structure, and so that we can
9852 more easily change event loops in the future if needed. Closes
9854 - Introduce a function to call getsockname() and return tor_addr_t,
9855 to save a little complexity throughout the codebase. Closes
9857 - Make hsdir_index in node_t a hsdir_index_t rather than a pointer
9858 as hsdir_index is always present. Also, we move hsdir_index_t into
9859 or.h. Closes ticket 23094. Patch by Neel Chauhan.
9860 - Merge functions used for describing nodes and suppress the
9861 functions that do not allocate memory for the output buffer
9862 string. NODE_DESC_BUF_LEN constant and format_node_description()
9863 function cannot be used externally from router.c module anymore.
9864 Closes ticket 25432. Patch by valentecaio.
9865 - Our main loop has been simplified so that all important operations
9866 happen inside events. Previously, some operations had to happen
9867 outside the event loop, to prevent infinite sequences of event
9868 activations. Closes ticket 25374.
9869 - Put a SHA1 public key digest in hs_service_intro_point_t, and use
9870 it in register_intro_circ() and service_intro_point_new(). This
9871 prevents the digest from being re-calculated each time. Closes
9872 ticket 23107. Patch by Neel Chauhan.
9873 - Refactor token-bucket implementations to use a common backend.
9874 Closes ticket 25766.
9875 - Remove extern declaration of stats_n_seconds_working variable from
9876 main, protecting its accesses with get_uptime() and reset_uptime()
9877 functions. Closes ticket 25081, patch by “valentecaio”.
9878 - Remove our previous logic for "cached gettimeofday()" -- our
9879 coarse monotonic timers are fast enough for this purpose, and far
9880 less error-prone. Implements part of ticket 25927.
9881 - Remove the return value for fascist_firewall_choose_address_base(),
9882 and sister functions such as fascist_firewall_choose_address_node()
9883 and fascist_firewall_choose_address_rs(). Also, while we're here,
9884 initialize the ap argument as leaving it uninitialized can pose a
9885 security hazard. Closes ticket 24734. Patch by Neel Chauhan.
9886 - Rename two fields of connection_t struct. timestamp_lastwritten is
9887 renamed to timestamp_last_write_allowed and timestamp_lastread is
9888 renamed to timestamp_last_read_allowed. Closes ticket 24714, patch
9890 - Since Tor requires C99, remove our old workaround code for libc
9891 implementations where free(NULL) doesn't work. Closes ticket 24484.
9892 - Use our standard rate-limiting code to deal with excessive
9893 libevent failures, rather than the hand-rolled logic we had
9894 before. Closes ticket 26016.
9895 - We remove the return value of node_get_prim_orport() and
9896 node_get_prim_dirport(), and introduce node_get_prim_orport() in
9897 node_ipv6_or_preferred() and node_ipv6_dir_preferred() in order to
9898 check for a null address. Closes ticket 23873. Patch by
9900 - We switch to should_record_bridge_info() in
9901 geoip_note_client_seen() and options_need_geoip_info() instead of
9902 accessing the configuration values directly. Fixes bug 25290;
9903 bugfix on 0.2.1.6-alpha. Patch by Neel Chauhan.
9905 o Deprecated features:
9906 - As we are not recommending 0.2.5 anymore, we require relays that
9907 once had an ed25519 key associated with their RSA key to always
9908 have that key, instead of allowing them to drop back to a version
9909 that didn't support ed25519. This means they need to use a new RSA
9910 key if they want to downgrade to an older version of tor without
9911 ed25519. Closes ticket 20522.
9914 - Correct an IPv6 error in the documentation for ExitPolicy. Closes
9915 ticket 25857. Patch from "CTassisF".
9918 - Directory authorities will no longer support voting according to
9919 any consensus method before consensus method 25. This keeps
9920 authorities compatible with all authorities running 0.2.9.8 and
9921 later, and does not break any clients or relays. Implements ticket
9922 24378 and proposal 290.
9923 - The PortForwarding and PortForwardingHelper features have been
9924 removed. The reasoning is, given that implementations of NAT
9925 traversal protocols within common consumer grade routers are
9926 frequently buggy, and that the target audience for a NAT punching
9927 feature is a perhaps less-technically-inclined relay operator,
9928 when the helper fails to setup traversal the problems are usually
9929 deep, ugly, and very router specific, making them horrendously
9930 impossible for technical support to reliable assist with, and thus
9931 resulting in frustration all around. Unfortunately, relay
9932 operators who would like to run relays behind NATs will need to
9933 become more familiar with the port forwarding configurations on
9934 their local router. Closes 25409.
9935 - The TestingEnableTbEmptyEvent option has been removed. It was used
9936 in testing simulations to measure how often connection buckets
9937 were emptied, in order to improve our scheduling, but it has not
9938 been actively used in years. Closes ticket 25760.
9939 - The old "round-robin" circuit multiplexer (circuitmux)
9940 implementation has been removed, along with a fairly large set of
9941 code that existed to support it. It has not been the default
9942 circuitmux since we introduced the "EWMA" circuitmux in 0.2.4.x,
9943 but it still required an unreasonable amount of memory and CPU.
9944 Closes ticket 25268.
9947 Changes in version 0.3.3.5-rc - 2018-04-15
9948 Tor 0.3.3.5-rc fixes various bugs in earlier versions of Tor,
9949 including some that could affect reliability or correctness.
9951 This is the first release candidate in the 0.3.3 series. If we find no
9952 new bugs or regression here, then the first stable 0.3.3 release will
9953 be nearly identical to this one.
9955 o Major bugfixes (security, protover, voting):
9956 - Revise Rust implementation of protover to use a more memory-
9957 efficient voting algorithm and corresponding data structures, thus
9958 avoiding a potential memory-based DoS attack where specially
9959 crafted protocol strings would expand to fill available memory.
9960 Fixes bug 24031; bugfix on 0.3.3.1-alpha.
9962 o Major bugfixes (performance, load balancing):
9963 - Directory authorities no longer vote in favor of the Guard flag
9964 for relays without directory support. Starting in Tor
9965 0.3.0.1-alpha, clients have been avoiding using such relays in the
9966 Guard position, leading to increasingly broken load balancing for
9967 the 5%-or-so of Guards that don't advertise directory support.
9968 Fixes bug 22310; bugfix on 0.3.0.6.
9970 o Minor feature (continuous integration):
9971 - Update the Travis CI configuration to use the stable Rust channel,
9972 now that we have decided to require that. Closes ticket 25714.
9974 o Minor features (config options):
9975 - Change the way the default value for MaxMemInQueues is calculated.
9976 We now use 40% of the hardware RAM if the system has 8 GB RAM or
9977 more. Otherwise we use the former value of 75%. Closes
9980 o Minor features (geoip):
9981 - Update geoip and geoip6 to the April 3 2018 Maxmind GeoLite2
9982 Country database. Closes ticket 25718.
9984 o Minor bugfixes (client):
9985 - When using a listed relay as a bridge, and also using
9986 microdescriptors, and considering that relay as a non-bridge in a
9987 circuit, treat its microdescriptor as a valid source of
9988 information about that relay. This change should prevent a non-
9989 fatal assertion error. Fixes bug 25691; bugfix on 0.3.3.4-alpha.
9991 o Minor bugfixes (controller):
9992 - Restore the correct operation of the RESOLVE command, which had
9993 been broken since we added the ability to enable/disable DNS on
9994 specific listener ports. Fixes bug 25617; bugfix on 0.2.9.3-alpha.
9996 o Minor bugfixes (distribution, compilation, rust):
9997 - Build correctly when the rust dependencies submodule is loaded,
9998 but the TOR_RUST_DEPENDENCIES environment variable is not set.
9999 Fixes bug 25679; bugfix on 0.3.3.1-alpha.
10000 - Actually include all of our Rust source in our source
10001 distributions. (Previously, a few of the files were accidentally
10002 omitted.) Fixes bug 25732; bugfix on 0.3.3.2-alpha.
10004 o Minor bugfixes (documentation):
10005 - Document that the PerConnBW{Rate,Burst} options will fall back to
10006 their corresponding consensus parameters only if those parameters
10007 are set. Previously we had claimed that these values would always
10008 be set in the consensus. Fixes bug 25296; bugfix on 0.2.2.7-alpha.
10009 - Revert a misformatting issue in the ExitPolicy documentation.
10010 Fixes bug 25582; bugfix on 0.3.3.1-alpha.
10012 o Minor bugfixes (exit relay DNS retries):
10013 - Re-attempt timed-out DNS queries 3 times before failure, since our
10014 timeout is 5 seconds for them, but clients wait 10-15. Also allow
10015 slightly more timeouts per resolver when an exit has multiple
10016 resolvers configured. Fixes bug 21394; bugfix on 0.3.1.9.
10018 o Minor bugfixes (onion services):
10019 - Re-instate counting the client HSDir fetch circuits against the
10020 MaxClientCircuitsPending rate limit. Fixes bug 24989; bugfix
10022 - Remove underscores from the _HSLayer{2,3}Nodes options. This
10023 expert-user configuration can now be enabled as HSLayer{2,3}Nodes.
10024 Fixes bug 25581; bugfix on 0.3.3.1-alpha
10026 o Code simplification and refactoring:
10027 - Move the list of default directory authorities to its own file.
10028 Closes ticket 24854. Patch by "beastr0".
10030 o Documentation (manpage, denial of service):
10031 - Provide more detail about the denial-of-service options, by
10032 listing each mitigation and explaining how they relate. Closes
10036 Changes in version 0.3.3.4-alpha - 2018-03-29
10037 Tor 0.3.3.4-alpha includes various bugfixes for issues found during
10038 the alpha testing of earlier releases in its series. We are
10039 approaching a stable 0.3.3.4-alpha release: more testing is welcome!
10041 o New system requirements:
10042 - When built with Rust, Tor now depends on version 0.2.39 of the
10043 libc crate. Closes tickets 25310 and 25664.
10045 o Major bugfixes (relay, connection):
10046 - If we have failed to connect to a relay and received a connection
10047 refused, timeout, or similar error (at the TCP level), do not try
10048 that same address/port again for 60 seconds after the failure has
10049 occurred. Fixes bug 24767; bugfix on 0.0.6.
10051 o Minor features (geoip):
10052 - Update geoip and geoip6 to the March 8 2018 Maxmind GeoLite2
10053 Country database. Closes ticket 25469.
10055 o Minor features (log messages):
10056 - Improve log message in the out-of-memory handler to include
10057 information about memory usage from the different compression
10058 backends. Closes ticket 25372.
10060 o Minor features (sandbox):
10061 - Explicitly permit the poll() system call when the Linux
10062 seccomp2-based sandbox is enabled: apparently, some versions of
10063 libc use poll() when calling getpwnam(). Closes ticket 25313.
10065 o Minor bugfixes (C correctness):
10066 - Fix a very unlikely (impossible, we believe) null pointer
10067 dereference. Fixes bug 25629; bugfix on 0.2.9.15. Found by
10068 Coverity; this is CID 1430932.
10070 o Minor bugfixes (channel, client):
10071 - Better identify client connection when reporting to the geoip
10072 client cache. Fixes bug 24904; bugfix on 0.3.1.7.
10074 o Minor bugfixes (compilation):
10075 - Fix a C99 compliance issue in our configuration script that caused
10076 compilation issues when compiling Tor with certain versions of
10077 xtools. Fixes bug 25474; bugfix on 0.3.2.5-alpha.
10079 o Minor bugfixes (controller, reliability):
10080 - Avoid a (nonfatal) assertion failure when extending a one-hop
10081 circuit from the controller to become a multihop circuit. Fixes
10082 bug 24903; bugfix on 0.2.5.2-alpha.
10084 o Major bugfixes (networking):
10085 - Tor will no longer reject IPv6 address strings from Tor Browser
10086 when they are passed as hostnames in SOCKS5 requests. Fixes bug
10087 25036, bugfix on Tor 0.3.1.2.
10089 o Minor bugfixes (networking):
10090 - string_is_valid_hostname() will not consider IP strings to be
10091 valid hostnames. Fixes bug 25055; bugfix on Tor 0.2.5.5.
10093 o Minor bugfixes (onion service v3):
10094 - Avoid an assertion failure when the next onion service
10095 descriptor rotation type is out of sync with the consensus's
10096 valid-after time. Instead, log a warning message with extra
10097 information, so we can better hunt down the cause of this
10098 assertion. Fixes bug 25306; bugfix on 0.3.2.1-alpha.
10100 o Minor bugfixes (testing):
10101 - Avoid intermittent test failures due to a test that had relied on
10102 onion service introduction point creation finishing within 5
10103 seconds of real clock time. Fixes bug 25450; bugfix
10105 - Rust crates are now automatically detected and tested. Previously,
10106 some crates were not tested by `make test-rust` due to a static
10107 string in the `src/test/test_rust.sh` script specifying which
10108 crates to test. Fixes bug 25560; bugfix on 0.3.3.3-alpha.
10110 o Minor bugfixes (testing, benchmarks):
10111 - Fix a crash when running benchmark tests on win32 systems. The
10112 crash was due to a mutex that wasn't initialized before logging
10113 and options were initialized. Fixes bug 25479; bugfix
10116 o Minor bugfixes (warnings, ipv6):
10117 - Avoid a bug warning that could occur when trying to connect to a
10118 relay over IPv6. This warning would occur on a Tor instance that
10119 downloads router descriptors, but prefers to use microdescriptors.
10120 Fixes bug 25213; bugfix on 0.3.3.1-alpha.
10122 o Code simplification and refactoring:
10123 - Remove the old (deterministic) directory retry logic entirely:
10124 We've used exponential backoff exclusively for some time. Closes
10128 - Improved the documentation of AccountingStart parameter. Closes
10130 - Update the documentation for "Log" to include the current list of
10131 logging domains. Closes ticket 25378.
10134 Changes in version 0.3.1.10 - 2018-03-03
10135 Tor 0.3.1.10 backports a number of bugfixes, including important fixes for
10138 It includes an important security fix for a remote crash attack
10139 against directory authorities, tracked as TROVE-2018-001.
10141 This release also backports our new system for improved resistance to
10142 denial-of-service attacks against relays.
10144 This release also fixes several minor bugs and annoyances from
10147 All directory authorities should upgrade to one of the versions
10148 released today. Relays running 0.3.1.x may wish to update to one of
10149 the versions released today, for the DoS mitigations.
10151 Please note: according to our release calendar, Tor 0.3.1 will no
10152 longer be supported after 1 July 2018. If you will be running Tor
10153 after that date, you should make sure to plan to upgrade to the latest
10154 stable version, or downgrade to 0.2.9 (which will receive long-term
10157 o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha):
10158 - Fix a protocol-list handling bug that could be used to remotely crash
10159 directory authorities with a null-pointer exception. Fixes bug 25074;
10160 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
10163 o Major features (denial-of-service mitigation, backport from 0.3.3.2-alpha):
10164 - Give relays some defenses against the recent network overload. We
10165 start with three defenses (default parameters in parentheses).
10166 First: if a single client address makes too many concurrent
10167 connections (>100), hang up on further connections. Second: if a
10168 single client address makes circuits too quickly (more than 3 per
10169 second, with an allowed burst of 90) while also having too many
10170 connections open (3), refuse new create cells for the next while
10171 (1-2 hours). Third: if a client asks to establish a rendezvous
10172 point to you directly, ignore the request. These defenses can be
10173 manually controlled by new torrc options, but relays will also
10174 take guidance from consensus parameters, so there's no need to
10175 configure anything manually. Implements ticket 24902.
10177 o Minor features (linux seccomp2 sandbox, backport from 0.3.2.5-alpha):
10178 - Update the sandbox rules so that they should now work correctly
10179 with Glibc 2.26. Closes ticket 24315.
10181 o Major bugfixes (onion services, retry behavior, backport from 0.3.3.1-alpha):
10182 - Fix an "off by 2" error in counting rendezvous failures on the
10183 onion service side. While we thought we would stop the rendezvous
10184 attempt after one failed circuit, we were actually making three
10185 circuit attempts before giving up. Now switch to a default of 2,
10186 and allow the consensus parameter "hs_service_max_rdv_failures" to
10187 override. Fixes bug 24895; bugfix on 0.0.6.
10189 o Major bugfixes (protocol versions, backport from 0.3.3.2-alpha):
10190 - Add Link protocol version 5 to the supported protocols list. Fixes
10191 bug 25070; bugfix on 0.3.1.1-alpha.
10193 o Major bugfixes (relay, backport from 0.3.3.1-alpha):
10194 - Fix a set of false positives where relays would consider
10195 connections to other relays as being client-only connections (and
10196 thus e.g. deserving different link padding schemes) if those
10197 relays fell out of the consensus briefly. Now we look only at the
10198 initial handshake and whether the connection authenticated as a
10199 relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha.
10201 o Minor features (denial-of-service avoidance, backport from 0.3.3.2-alpha):
10202 - Make our OOM handler aware of the geoip client history cache so it
10203 doesn't fill up the memory. This check is important for IPv6 and
10204 our DoS mitigation subsystem. Closes ticket 25122.
10206 o Minor feature (relay statistics, backport from 0.3.2.6-alpha):
10207 - Change relay bandwidth reporting stats interval from 4 hours to 24
10208 hours in order to reduce the efficiency of guard discovery
10209 attacks. Fixes ticket 23856.
10211 o Minor features (compatibility, OpenSSL, backport from 0.3.3.3-alpha):
10212 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
10213 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
10214 since they neither disabled TLS 1.3 nor enabled any of the
10215 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
10216 Closes ticket 24978.
10218 o Minor features (fallback directory mirrors, backport from 0.3.2.9):
10219 - The fallback directory list has been re-generated based on the
10220 current status of the network. Tor uses fallback directories to
10221 bootstrap when it doesn't yet have up-to-date directory
10222 information. Closes ticket 24801.
10223 - Make the default DirAuthorityFallbackRate 0.1, so that clients
10224 prefer to bootstrap from fallback directory mirrors. This is a
10225 follow-up to 24679, which removed weights from the default
10226 fallbacks. Implements ticket 24681.
10228 o Minor features (geoip):
10229 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
10232 o Minor bugfix (channel connection, backport from 0.3.3.2-alpha):
10233 - Use the actual observed address of an incoming relay connection,
10234 not the canonical address of the relay from its descriptor, when
10235 making decisions about how to handle the incoming connection.
10236 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
10238 o Minor bugfix (directory authority, backport from 0.3.3.2-alpha):
10239 - Directory authorities, when refusing a descriptor from a rejected
10240 relay, now explicitly tell the relay (in its logs) to set a valid
10241 ContactInfo address and contact the bad-relays@ mailing list.
10242 Fixes bug 25170; bugfix on 0.2.9.1.
10244 o Minor bugfixes (address selection, backport from 0.3.2.9):
10245 - When the fascist_firewall_choose_address_ functions don't find a
10246 reachable address, set the returned address to the null address
10247 and port. This is a precautionary measure, because some callers do
10248 not check the return value. Fixes bug 24736; bugfix
10251 o Major bugfixes (bootstrapping, backport from 0.3.2.5-alpha):
10252 - Fetch descriptors aggressively whenever we lack enough to build
10253 circuits, regardless of how many descriptors we are missing.
10254 Previously, we would delay launching the fetch when we had fewer
10255 than 15 missing descriptors, even if some of those descriptors
10256 were blocking circuits from building. Fixes bug 23985; bugfix on
10257 0.1.1.11-alpha. The effects of this bug became worse in
10258 0.3.0.3-alpha, when we began treating missing descriptors from our
10259 primary guards as a reason to delay circuits.
10260 - Don't try fetching microdescriptors from relays that have failed
10261 to deliver them in the past. Fixes bug 23817; bugfix
10264 o Minor bugfixes (compilation, backport from 0.3.2.7-rc):
10265 - Fix a signed/unsigned comparison warning introduced by our fix to
10266 TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16.
10268 o Minor bugfixes (control port, linux seccomp2 sandbox, backport from 0.3.2.5-alpha):
10269 - Avoid a crash when attempting to use the seccomp2 sandbox together
10270 with the OwningControllerProcess feature. Fixes bug 24198; bugfix
10273 o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha):
10274 - Fix a possible crash on malformed consensus. If a consensus had
10275 contained an unparseable protocol line, it could have made clients
10276 and relays crash with a null-pointer exception. To exploit this
10277 issue, however, an attacker would need to be able to subvert the
10278 directory authority system. Fixes bug 25251; bugfix on
10279 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
10281 o Minor bugfixes (directory cache, backport from 0.3.2.5-alpha):
10282 - Recover better from empty or corrupt files in the consensus cache
10283 directory. Fixes bug 24099; bugfix on 0.3.1.1-alpha.
10284 - When a consensus diff calculation is only partially successful,
10285 only record the successful parts as having succeeded. Partial
10286 success can happen if (for example) one compression method fails
10287 but the others succeed. Previously we misrecorded all the
10288 calculations as having succeeded, which would later cause a
10289 nonfatal assertion failure. Fixes bug 24086; bugfix
10292 o Minor bugfixes (entry guards, backport from 0.3.2.3-alpha):
10293 - Tor now updates its guard state when it reads a consensus
10294 regardless of whether it's missing descriptors. That makes tor use
10295 its primary guards to fetch descriptors in some edge cases where
10296 it would previously have used fallback directories. Fixes bug
10297 23862; bugfix on 0.3.0.1-alpha.
10299 o Minor bugfixes (logging, backport from 0.3.3.2-alpha):
10300 - Don't treat inability to store a cached consensus object as a bug:
10301 it can happen normally when we are out of disk space. Fixes bug
10302 24859; bugfix on 0.3.1.1-alpha.
10304 o Minor bugfixes (memory usage, backport from 0.3.2.8-rc):
10305 - When queuing DESTROY cells on a channel, only queue the circuit-id
10306 and reason fields: not the entire 514-byte cell. This fix should
10307 help mitigate any bugs or attacks that fill up these queues, and
10308 free more RAM for other uses. Fixes bug 24666; bugfix
10311 o Minor bugfixes (network layer, backport from 0.3.2.5-alpha):
10312 - When closing a connection via close_connection_immediately(), we
10313 mark it as "not blocked on bandwidth", to prevent later calls from
10314 trying to unblock it, and give it permission to read. This fixes a
10315 backtrace warning that can happen on relays under various
10316 circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc.
10318 o Minor bugfixes (path selection, backport from 0.3.2.4-alpha):
10319 - When selecting relays by bandwidth, avoid a rounding error that
10320 could sometimes cause load to be imbalanced incorrectly.
10321 Previously, we would always round upwards; now, we round towards
10322 the nearest integer. This had the biggest effect when a relay's
10323 weight adjustments should have given it weight 0, but it got
10324 weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha.
10325 - When calculating the fraction of nodes that have descriptors, and
10326 all nodes in the network have zero bandwidths, count the number of
10327 nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha.
10328 - Actually log the total bandwidth in compute_weighted_bandwidths().
10329 Fixes bug 24170; bugfix on 0.2.4.3-alpha.
10331 o Minor bugfixes (performance, fragile-hardening, backport from 0.3.3.1-alpha):
10332 - Improve the performance of our consensus-diff application code
10333 when Tor is built with the --enable-fragile-hardening option set.
10334 Fixes bug 24826; bugfix on 0.3.1.1-alpha.
10336 o Minor bugfixes (OSX, backport from 0.3.3.1-alpha):
10337 - Don't exit the Tor process if setrlimit() fails to change the file
10338 limit (which can happen sometimes on some versions of OSX). Fixes
10339 bug 21074; bugfix on 0.0.9pre5.
10341 o Minor bugfixes (portability, msvc, backport from 0.3.2.9):
10342 - Fix a bug in the bit-counting parts of our timing-wheel code on
10343 MSVC. (Note that MSVC is still not a supported build platform, due
10344 to cyptographic timing channel risks.) Fixes bug 24633; bugfix
10347 o Minor bugfixes (relay, partial backport):
10348 - Make the internal channel_is_client() function look at what sort
10349 of connection handshake the other side used, rather than whether
10350 the other side ever sent a create_fast cell to us. Backports part
10351 of the fixes from bugs 22805 and 24898.
10353 o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha):
10354 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
10356 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
10357 bugfix on 0.2.9.4-alpha.
10359 o Code simplification and refactoring (backport from 0.3.3.3-alpha):
10360 - Update the "rust dependencies" submodule to be a project-level
10361 repository, rather than a user repository. Closes ticket 25323.
10364 Changes in version 0.2.9.15 - 2018-03-03
10365 Tor 0.2.9.15 backports important security and stability bugfixes from
10366 later Tor releases.
10368 It includes an important security fix for a remote crash attack
10369 against directory authorities, tracked as TROVE-2018-001.
10371 This release also backports our new system for improved resistance to
10372 denial-of-service attacks against relays.
10374 This release also fixes several minor bugs and annoyances from
10377 All directory authorities should upgrade to one of the versions
10378 released today. Relays running 0.2.9.x may wish to update to one of
10379 the versions released today, for the DoS mitigations.
10381 o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha):
10382 - Fix a protocol-list handling bug that could be used to remotely crash
10383 directory authorities with a null-pointer exception. Fixes bug 25074;
10384 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
10387 o Major features (denial-of-service mitigation):
10388 - Give relays some defenses against the recent network overload. We
10389 start with three defenses (default parameters in parentheses).
10390 First: if a single client address makes too many concurrent
10391 connections (>100), hang up on further connections. Second: if a
10392 single client address makes circuits too quickly (more than 3 per
10393 second, with an allowed burst of 90) while also having too many
10394 connections open (3), refuse new create cells for the next while
10395 (1-2 hours). Third: if a client asks to establish a rendezvous
10396 point to you directly, ignore the request. These defenses can be
10397 manually controlled by new torrc options, but relays will also
10398 take guidance from consensus parameters, so there's no need to
10399 configure anything manually. Implements ticket 24902.
10401 o Major bugfixes (bootstrapping):
10402 - Fetch descriptors aggressively whenever we lack enough to build
10403 circuits, regardless of how many descriptors we are missing.
10404 Previously, we would delay launching the fetch when we had fewer
10405 than 15 missing descriptors, even if some of those descriptors
10406 were blocking circuits from building. Fixes bug 23985; bugfix on
10407 0.1.1.11-alpha. The effects of this bug became worse in
10408 0.3.0.3-alpha, when we began treating missing descriptors from our
10409 primary guards as a reason to delay circuits.
10411 o Major bugfixes (onion services, retry behavior):
10412 - Fix an "off by 2" error in counting rendezvous failures on the
10413 onion service side. While we thought we would stop the rendezvous
10414 attempt after one failed circuit, we were actually making three
10415 circuit attempts before giving up. Now switch to a default of 2,
10416 and allow the consensus parameter "hs_service_max_rdv_failures" to
10417 override. Fixes bug 24895; bugfix on 0.0.6.
10419 o Minor feature (relay statistics):
10420 - Change relay bandwidth reporting stats interval from 4 hours to 24
10421 hours in order to reduce the efficiency of guard discovery
10422 attacks. Fixes ticket 23856.
10424 o Minor features (compatibility, OpenSSL):
10425 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
10426 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
10427 since they neither disabled TLS 1.3 nor enabled any of the
10428 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
10429 Closes ticket 24978.
10431 o Minor features (denial-of-service avoidance):
10432 - Make our OOM handler aware of the geoip client history cache so it
10433 doesn't fill up the memory. This check is important for IPv6 and
10434 our DoS mitigation subsystem. Closes ticket 25122.
10436 o Minor features (fallback directory mirrors):
10437 - The fallback directory list has been re-generated based on the
10438 current status of the network. Tor uses fallback directories to
10439 bootstrap when it doesn't yet have up-to-date directory
10440 information. Closes ticket 24801.
10441 - Make the default DirAuthorityFallbackRate 0.1, so that clients
10442 prefer to bootstrap from fallback directory mirrors. This is a
10443 follow-up to 24679, which removed weights from the default
10444 fallbacks. Implements ticket 24681.
10446 o Minor features (geoip):
10447 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
10450 o Minor features (linux seccomp2 sandbox):
10451 - Update the sandbox rules so that they should now work correctly
10452 with Glibc 2.26. Closes ticket 24315.
10454 o Minor bugfix (channel connection):
10455 - Use the actual observed address of an incoming relay connection,
10456 not the canonical address of the relay from its descriptor, when
10457 making decisions about how to handle the incoming connection.
10458 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
10460 o Minor bugfix (directory authority):
10461 - Directory authorities, when refusing a descriptor from a rejected
10462 relay, now explicitly tell the relay (in its logs) to set a valid
10463 ContactInfo address and contact the bad-relays@ mailing list.
10464 Fixes bug 25170; bugfix on 0.2.9.1.
10466 o Minor bugfixes (address selection):
10467 - When the fascist_firewall_choose_address_ functions don't find a
10468 reachable address, set the returned address to the null address
10469 and port. This is a precautionary measure, because some callers do
10470 not check the return value. Fixes bug 24736; bugfix
10473 o Minor bugfixes (compilation):
10474 - Fix a signed/unsigned comparison warning introduced by our fix to
10475 TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16.
10477 o Minor bugfixes (control port, linux seccomp2 sandbox):
10478 - Avoid a crash when attempting to use the seccomp2 sandbox together
10479 with the OwningControllerProcess feature. Fixes bug 24198; bugfix
10482 o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha):
10483 - Fix a possible crash on malformed consensus. If a consensus had
10484 contained an unparseable protocol line, it could have made clients
10485 and relays crash with a null-pointer exception. To exploit this
10486 issue, however, an attacker would need to be able to subvert the
10487 directory authority system. Fixes bug 25251; bugfix on
10488 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
10490 o Minor bugfixes (memory usage):
10491 - When queuing DESTROY cells on a channel, only queue the circuit-id
10492 and reason fields: not the entire 514-byte cell. This fix should
10493 help mitigate any bugs or attacks that fill up these queues, and
10494 free more RAM for other uses. Fixes bug 24666; bugfix
10497 o Minor bugfixes (network layer):
10498 - When closing a connection via close_connection_immediately(), we
10499 mark it as "not blocked on bandwidth", to prevent later calls from
10500 trying to unblock it, and give it permission to read. This fixes a
10501 backtrace warning that can happen on relays under various
10502 circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc.
10504 o Minor bugfixes (OSX):
10505 - Don't exit the Tor process if setrlimit() fails to change the file
10506 limit (which can happen sometimes on some versions of OSX). Fixes
10507 bug 21074; bugfix on 0.0.9pre5.
10509 o Minor bugfixes (path selection):
10510 - When selecting relays by bandwidth, avoid a rounding error that
10511 could sometimes cause load to be imbalanced incorrectly.
10512 Previously, we would always round upwards; now, we round towards
10513 the nearest integer. This had the biggest effect when a relay's
10514 weight adjustments should have given it weight 0, but it got
10515 weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha.
10516 - When calculating the fraction of nodes that have descriptors, and
10517 all nodes in the network have zero bandwidths, count the number of
10518 nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha.
10519 - Actually log the total bandwidth in compute_weighted_bandwidths().
10520 Fixes bug 24170; bugfix on 0.2.4.3-alpha.
10522 o Minor bugfixes (portability, msvc):
10523 - Fix a bug in the bit-counting parts of our timing-wheel code on
10524 MSVC. (Note that MSVC is still not a supported build platform, due
10525 to cryptographic timing channel risks.) Fixes bug 24633; bugfix
10528 o Minor bugfixes (relay):
10529 - Make the internal channel_is_client() function look at what sort
10530 of connection handshake the other side used, rather than whether
10531 the other side ever sent a create_fast cell to us. Backports part
10532 of the fixes from bugs 22805 and 24898.
10534 o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha):
10535 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
10537 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
10538 bugfix on 0.2.9.4-alpha.
10541 Changes in version 0.3.2.10 - 2018-03-03
10542 Tor 0.3.2.10 is the second stable release in the 0.3.2 series. It
10543 backports a number of bugfixes, including important fixes for security
10546 It includes an important security fix for a remote crash attack
10547 against directory authorities, tracked as TROVE-2018-001.
10549 Additionally, it backports a fix for a bug whose severity we have
10550 upgraded: Bug 24700, which was fixed in 0.3.3.2-alpha, can be remotely
10551 triggered in order to crash relays with a use-after-free pattern. As
10552 such, we are now tracking that bug as TROVE-2018-002 and
10553 CVE-2018-0491, and backporting it to earlier releases. This bug
10554 affected versions 0.3.2.1-alpha through 0.3.2.9, as well as version
10557 This release also backports our new system for improved resistance to
10558 denial-of-service attacks against relays.
10560 This release also fixes several minor bugs and annoyances from
10563 Relays running 0.3.2.x SHOULD upgrade to one of the versions released
10564 today, for the fix to TROVE-2018-002. Directory authorities should
10565 also upgrade. (Relays on earlier versions might want to update too for
10566 the DoS mitigations.)
10568 o Major bugfixes (denial-of-service, directory authority, backport from 0.3.3.3-alpha):
10569 - Fix a protocol-list handling bug that could be used to remotely crash
10570 directory authorities with a null-pointer exception. Fixes bug 25074;
10571 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
10574 o Major bugfixes (scheduler, KIST, denial-of-service, backport from 0.3.3.2-alpha):
10575 - Avoid adding the same channel twice in the KIST scheduler pending
10576 list, which could lead to remote denial-of-service use-after-free
10577 attacks against relays. Fixes bug 24700; bugfix on 0.3.2.1-alpha.
10579 o Major features (denial-of-service mitigation, backport from 0.3.3.2-alpha):
10580 - Give relays some defenses against the recent network overload. We
10581 start with three defenses (default parameters in parentheses).
10582 First: if a single client address makes too many concurrent
10583 connections (>100), hang up on further connections. Second: if a
10584 single client address makes circuits too quickly (more than 3 per
10585 second, with an allowed burst of 90) while also having too many
10586 connections open (3), refuse new create cells for the next while
10587 (1-2 hours). Third: if a client asks to establish a rendezvous
10588 point to you directly, ignore the request. These defenses can be
10589 manually controlled by new torrc options, but relays will also
10590 take guidance from consensus parameters, so there's no need to
10591 configure anything manually. Implements ticket 24902.
10593 o Major bugfixes (onion services, retry behavior, backport from 0.3.3.1-alpha):
10594 - Fix an "off by 2" error in counting rendezvous failures on the
10595 onion service side. While we thought we would stop the rendezvous
10596 attempt after one failed circuit, we were actually making three
10597 circuit attempts before giving up. Now switch to a default of 2,
10598 and allow the consensus parameter "hs_service_max_rdv_failures" to
10599 override. Fixes bug 24895; bugfix on 0.0.6.
10600 - New-style (v3) onion services now obey the "max rendezvous circuit
10601 attempts" logic. Previously they would make as many rendezvous
10602 circuit attempts as they could fit in the MAX_REND_TIMEOUT second
10603 window before giving up. Fixes bug 24894; bugfix on 0.3.2.1-alpha.
10605 o Major bugfixes (protocol versions, backport from 0.3.3.2-alpha):
10606 - Add Link protocol version 5 to the supported protocols list. Fixes
10607 bug 25070; bugfix on 0.3.1.1-alpha.
10609 o Major bugfixes (relay, backport from 0.3.3.1-alpha):
10610 - Fix a set of false positives where relays would consider
10611 connections to other relays as being client-only connections (and
10612 thus e.g. deserving different link padding schemes) if those
10613 relays fell out of the consensus briefly. Now we look only at the
10614 initial handshake and whether the connection authenticated as a
10615 relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha.
10617 o Major bugfixes (scheduler, consensus, backport from 0.3.3.2-alpha):
10618 - The scheduler subsystem was failing to promptly notice changes in
10619 consensus parameters, making it harder to switch schedulers
10620 network-wide. Fixes bug 24975; bugfix on 0.3.2.1-alpha.
10622 o Minor features (denial-of-service avoidance, backport from 0.3.3.2-alpha):
10623 - Make our OOM handler aware of the geoip client history cache so it
10624 doesn't fill up the memory. This check is important for IPv6 and
10625 our DoS mitigation subsystem. Closes ticket 25122.
10627 o Minor features (compatibility, OpenSSL, backport from 0.3.3.3-alpha):
10628 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
10629 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
10630 since they neither disabled TLS 1.3 nor enabled any of the
10631 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
10632 Closes ticket 24978.
10634 o Minor features (geoip):
10635 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
10638 o Minor features (logging, diagnostic, backport from 0.3.3.2-alpha):
10639 - When logging a failure to create an onion service's descriptor,
10640 also log what the problem with the descriptor was. Diagnostic
10643 o Minor bugfix (channel connection, backport from 0.3.3.2-alpha):
10644 - Use the actual observed address of an incoming relay connection,
10645 not the canonical address of the relay from its descriptor, when
10646 making decisions about how to handle the incoming connection.
10647 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
10649 o Minor bugfixes (denial-of-service, backport from 0.3.3.3-alpha):
10650 - Fix a possible crash on malformed consensus. If a consensus had
10651 contained an unparseable protocol line, it could have made clients
10652 and relays crash with a null-pointer exception. To exploit this
10653 issue, however, an attacker would need to be able to subvert the
10654 directory authority system. Fixes bug 25251; bugfix on
10655 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
10657 o Minor bugfix (directory authority, backport from 0.3.3.2-alpha):
10658 - Directory authorities, when refusing a descriptor from a rejected
10659 relay, now explicitly tell the relay (in its logs) to set a valid
10660 ContactInfo address and contact the bad-relays@ mailing list.
10661 Fixes bug 25170; bugfix on 0.2.9.1.
10663 o Minor bugfixes (build, rust, backport from 0.3.3.1-alpha):
10664 - When building with Rust on OSX, link against libresolv, to work
10665 around the issue at https://github.com/rust-lang/rust/issues/46797.
10666 Fixes bug 24652; bugfix on 0.3.1.1-alpha.
10668 o Minor bugfixes (onion services, backport from 0.3.3.2-alpha):
10669 - Remove a BUG() statement when a client fetches an onion descriptor
10670 that has a lower revision counter than the one in its cache. This
10671 can happen in normal circumstances due to HSDir desync. Fixes bug
10672 24976; bugfix on 0.3.2.1-alpha.
10674 o Minor bugfixes (logging, backport from 0.3.3.2-alpha):
10675 - Don't treat inability to store a cached consensus object as a bug:
10676 it can happen normally when we are out of disk space. Fixes bug
10677 24859; bugfix on 0.3.1.1-alpha.
10679 o Minor bugfixes (performance, fragile-hardening, backport from 0.3.3.1-alpha):
10680 - Improve the performance of our consensus-diff application code
10681 when Tor is built with the --enable-fragile-hardening option set.
10682 Fixes bug 24826; bugfix on 0.3.1.1-alpha.
10684 o Minor bugfixes (OSX, backport from 0.3.3.1-alpha):
10685 - Don't exit the Tor process if setrlimit() fails to change the file
10686 limit (which can happen sometimes on some versions of OSX). Fixes
10687 bug 21074; bugfix on 0.0.9pre5.
10689 o Minor bugfixes (spec conformance, backport from 0.3.3.3-alpha):
10690 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
10692 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
10693 bugfix on 0.2.9.4-alpha.
10695 o Minor bugfixes (testing, backport from 0.3.3.1-alpha):
10696 - Fix a memory leak in the scheduler/loop_kist unit test. Fixes bug
10697 25005; bugfix on 0.3.2.7-rc.
10699 o Minor bugfixes (v3 onion services, backport from 0.3.3.2-alpha):
10700 - Look at the "HSRend" protocol version, not the "HSDir" protocol
10701 version, when deciding whether a consensus entry can support the
10702 v3 onion service protocol as a rendezvous point. Fixes bug 25105;
10703 bugfix on 0.3.2.1-alpha.
10705 o Code simplification and refactoring (backport from 0.3.3.3-alpha):
10706 - Update the "rust dependencies" submodule to be a project-level
10707 repository, rather than a user repository. Closes ticket 25323.
10709 o Documentation (backport from 0.3.3.1-alpha)
10710 - Document that operators who run more than one relay or bridge are
10711 expected to set MyFamily and ContactInfo correctly. Closes
10715 Changes in version 0.3.3.3-alpha - 2018-03-03
10716 Tor 0.3.3.3-alpha is the third alpha release for the 0.3.3.x series.
10717 It includes an important security fix for a remote crash attack
10718 against directory authorities tracked as TROVE-2018-001.
10720 Additionally, with this release, we are upgrading the severity of a
10721 bug fixed in 0.3.3.2-alpha. Bug 24700, which was fixed in
10722 0.3.3.2-alpha, can be remotely triggered in order to crash relays with
10723 a use-after-free pattern. As such, we are now tracking that bug as
10724 TROVE-2018-002 and CVE-2018-0491. This bug affected versions
10725 0.3.2.1-alpha through 0.3.2.9, as well as 0.3.3.1-alpha.
10727 This release also fixes several minor bugs and annoyances from
10730 Relays running 0.3.2.x should upgrade to one of the versions released
10731 today, for the fix to TROVE-2018-002. Directory authorities should
10732 also upgrade. (Relays on earlier versions might want to update too for
10733 the DoS mitigations.)
10735 o Major bugfixes (denial-of-service, directory authority):
10736 - Fix a protocol-list handling bug that could be used to remotely crash
10737 directory authorities with a null-pointer exception. Fixes bug 25074;
10738 bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2018-001 and
10741 o Minor features (compatibility, OpenSSL):
10742 - Tor will now support TLS1.3 once OpenSSL 1.1.1 is released.
10743 Previous versions of Tor would not have worked with OpenSSL 1.1.1,
10744 since they neither disabled TLS 1.3 nor enabled any of the
10745 ciphersuites it requires. Now we enable the TLS 1.3 ciphersuites.
10746 Closes ticket 24978.
10748 o Minor features (logging):
10749 - Clarify the log messages produced when getrandom() or a related
10750 entropy-generation mechanism gives an error. Closes ticket 25120.
10752 o Minor features (testing):
10753 - Add a "make test-rust" target to run the rust tests only. Closes
10756 o Minor bugfixes (denial-of-service):
10757 - Fix a possible crash on malformed consensus. If a consensus had
10758 contained an unparseable protocol line, it could have made clients
10759 and relays crash with a null-pointer exception. To exploit this
10760 issue, however, an attacker would need to be able to subvert the
10761 directory authority system. Fixes bug 25251; bugfix on
10762 0.2.9.4-alpha. Also tracked as TROVE-2018-004.
10764 o Minor bugfixes (DoS mitigation):
10765 - Add extra safety checks when refilling the circuit creation bucket
10766 to ensure we never set a value above the allowed maximum burst.
10767 Fixes bug 25202; bugfix on 0.3.3.2-alpha.
10768 - When a new consensus arrives, don't update our DoS-mitigation
10769 parameters if we aren't a public relay. Fixes bug 25223; bugfix
10772 o Minor bugfixes (man page, SocksPort):
10773 - Remove dead code from the old "SocksSocket" option, and rename
10774 SocksSocketsGroupWritable to UnixSocksGroupWritable. The old option
10775 still works, but is deprecated. Fixes bug 24343; bugfix on 0.2.6.3.
10777 o Minor bugfixes (performance):
10778 - Reduce the number of circuits that will be opened at once during
10779 the circuit build timeout phase. This is done by increasing the
10780 idle timeout to 3 minutes, and lowering the maximum number of
10781 concurrent learning circuits to 10. Fixes bug 24769; bugfix
10784 o Minor bugfixes (spec conformance):
10785 - Forbid "-0" as a protocol version. Fixes part of bug 25249; bugfix on
10787 - Forbid UINT32_MAX as a protocol version. Fixes part of bug 25249;
10788 bugfix on 0.2.9.4-alpha.
10790 o Minor bugfixes (spec conformance, rust):
10791 - Resolve a denial-of-service issue caused by an infinite loop in
10792 the rust protover code. Fixes bug 25250, bugfix on 0.3.3.1-alpha.
10793 Also tracked as TROVE-2018-003.
10795 o Code simplification and refactoring:
10796 - Update the "rust dependencies" submodule to be a project-level
10797 repository, rather than a user repository. Closes ticket 25323.
10800 Changes in version 0.3.3.2-alpha - 2018-02-10
10801 Tor 0.3.3.2-alpha is the second alpha in the 0.3.3.x series. It
10802 introduces a mechanism to handle the high loads that many relay
10803 operators have been reporting recently. It also fixes several bugs in
10804 older releases. If this new code proves reliable, we plan to backport
10805 it to older supported release series.
10807 o Major features (denial-of-service mitigation):
10808 - Give relays some defenses against the recent network overload. We
10809 start with three defenses (default parameters in parentheses).
10810 First: if a single client address makes too many concurrent
10811 connections (>100), hang up on further connections. Second: if a
10812 single client address makes circuits too quickly (more than 3 per
10813 second, with an allowed burst of 90) while also having too many
10814 connections open (3), refuse new create cells for the next while
10815 (1-2 hours). Third: if a client asks to establish a rendezvous
10816 point to you directly, ignore the request. These defenses can be
10817 manually controlled by new torrc options, but relays will also
10818 take guidance from consensus parameters, so there's no need to
10819 configure anything manually. Implements ticket 24902.
10821 o Major bugfixes (netflow padding):
10822 - Stop adding unneeded channel padding right after we finish
10823 flushing to a connection that has been trying to flush for many
10824 seconds. Instead, treat all partial or complete flushes as
10825 activity on the channel, which will defer the time until we need
10826 to add padding. This fix should resolve confusing and scary log
10827 messages like "Channel padding timeout scheduled 221453ms in the
10828 past." Fixes bug 22212; bugfix on 0.3.1.1-alpha.
10830 o Major bugfixes (protocol versions):
10831 - Add Link protocol version 5 to the supported protocols list. Fixes
10832 bug 25070; bugfix on 0.3.1.1-alpha.
10834 o Major bugfixes (scheduler, consensus):
10835 - The scheduler subsystem was failing to promptly notice changes in
10836 consensus parameters, making it harder to switch schedulers
10837 network-wide. Fixes bug 24975; bugfix on 0.3.2.1-alpha.
10839 o Minor features (denial-of-service avoidance):
10840 - Make our OOM handler aware of the geoip client history cache so it
10841 doesn't fill up the memory. This check is important for IPv6 and
10842 our DoS mitigation subsystem. Closes ticket 25122.
10844 o Minor features (directory authority):
10845 - When directory authorities are unable to add signatures to a
10846 pending consensus, log the reason why. Closes ticket 24849.
10848 o Minor features (geoip):
10849 - Update geoip and geoip6 to the February 7 2018 Maxmind GeoLite2
10852 o Minor features (logging, diagnostic):
10853 - When logging a failure to create an onion service's descriptor,
10854 also log what the problem with the descriptor was. Diagnostic for
10857 o Minor bugfix (channel connection):
10858 - Use the actual observed address of an incoming relay connection,
10859 not the canonical address of the relay from its descriptor, when
10860 making decisions about how to handle the incoming connection.
10861 Fixes bug 24952; bugfix on 0.2.4.11-alpha. Patch by "ffmancera".
10863 o Minor bugfix (directory authority):
10864 - Directory authorities, when refusing a descriptor from a rejected
10865 relay, now explicitly tell the relay (in its logs) to set a valid
10866 ContactInfo address and contact the bad-relays@ mailing list.
10867 Fixes bug 25170; bugfix on 0.2.9.1.
10869 o Minor bugfixes (all versions of Tor):
10870 - Use the "misspell" tool to detect and fix typos throughout the
10871 source code. Fixes bug 23650; bugfix on various versions of Tor.
10872 Patch from Deepesh Pathak.
10874 o Minor bugfixes (circuit, cannibalization):
10875 - Don't cannibalize preemptively-built circuits if we no longer
10876 recognize their first hop. This situation can happen if our Guard
10877 relay went off the consensus after the circuit was created. Fixes
10878 bug 24469; bugfix on 0.0.6.
10880 o Minor bugfixes (correctness):
10881 - Remove a nonworking, unnecessary check to see whether a circuit
10882 hop's identity digest was set when the circuit failed. Fixes bug
10883 24927; bugfix on 0.2.4.4-alpha.
10885 o Minor bugfixes (logging):
10886 - Don't treat inability to store a cached consensus object as a bug:
10887 it can happen normally when we are out of disk space. Fixes bug
10888 24859; bugfix on 0.3.1.1-alpha.
10889 - Fix a (mostly harmless) race condition when invoking
10890 LOG_PROTOCOL_WARN message from a subthread while the torrc options
10891 are changing. Fixes bug 23954; bugfix on 0.1.1.9-alpha.
10893 o Minor bugfixes (onion services):
10894 - Remove a BUG() statement when a client fetches an onion descriptor
10895 that has a lower revision counter than the one in its cache. This
10896 can happen in normal circumstances due to HSDir desync. Fixes bug
10897 24976; bugfix on 0.3.2.1-alpha.
10898 - If we are configured to offer a single onion service, don't log
10899 long-term established one hop rendezvous points in the heartbeat.
10900 Fixes bug 25116; bugfix on 0.2.9.6-rc.
10902 o Minor bugfixes (performance):
10903 - Avoid calling protocol_list_supports_protocol() from inside tight
10904 loops when running with cached routerinfo_t objects. Instead,
10905 summarize the relevant protocols as flags in the routerinfo_t, as
10906 we do for routerstatus_t objects. This change simplifies our code
10907 a little, and saves a large amount of short-term memory allocation
10908 operations. Fixes bug 25008; bugfix on 0.2.9.4-alpha.
10910 o Minor bugfixes (Rust FFI):
10911 - Fix a minor memory leak which would happen whenever the C code
10912 would call the Rust implementation of
10913 protover_get_supported_protocols(). This was due to the C version
10914 returning a static string, whereas the Rust version newly allocated
10915 a CString to pass across the FFI boundary. Consequently, the C
10916 code was not expecting to need to free() what it was given. Fixes
10917 bug 25127; bugfix on 0.3.2.1-alpha.
10919 o Minor bugfixes (scheduler, KIST):
10920 - Avoid adding the same channel twice in the KIST scheduler pending
10921 list, which would waste CPU cycles. Fixes bug 24700; bugfix
10924 o Minor bugfixes (unit test, monotonic time):
10925 - Increase a constant (1msec to 10msec) in the monotonic time test
10926 that makes sure the nsec/usec/msec times read are synchronized.
10927 This change was needed to accommodate slow systems like armel or
10928 when the clock_gettime() is not a VDSO on the running kernel.
10929 Fixes bug 25113; bugfix on 0.2.9.1.
10931 o Minor bugfixes (v3 onion services):
10932 - Look at the "HSRend" protocol version, not the "HSDir" protocol
10933 version, when deciding whether a consensus entry can support the
10934 v3 onion service protocol as a rendezvous point. Fixes bug 25105;
10935 bugfix on 0.3.2.1-alpha.
10937 o Code simplification and refactoring:
10938 - Remove the unused nodelist_recompute_all_hsdir_indices(). Closes
10940 - Remove a series of counters used to track circuit extend attempts
10941 and connection status but that in reality we aren't using for
10942 anything other than stats logged by a SIGUSR1 signal. Closes
10945 o Documentation (man page):
10946 - The HiddenServiceVersion torrc option accepts only one number:
10947 either version 2 or 3. Closes ticket 25026; bugfix
10951 Changes in version 0.3.3.1-alpha - 2018-01-25
10952 Tor 0.3.3.1-alpha is the first release in the 0.3.3.x series. It adds
10953 several new features to Tor, including several improvements to
10954 bootstrapping, and support for an experimental "vanguards" feature to
10955 resist guard discovery attacks. This series also includes better
10956 support for applications that need to embed Tor or manage v3
10959 o Major features (embedding):
10960 - There is now a documented stable API for programs that need to
10961 embed Tor. See tor_api.h for full documentation and known bugs.
10962 Closes ticket 23684.
10963 - Tor now has support for restarting in the same process.
10964 Controllers that run Tor using the "tor_api.h" interface can now
10965 restart Tor after Tor has exited. This support is incomplete,
10966 however: we fixed crash bugs that prevented it from working at
10967 all, but many bugs probably remain, including a possibility of
10968 security issues. Implements ticket 24581.
10970 o Major features (IPv6, directory documents):
10971 - Add consensus method 27, which adds IPv6 ORPorts to the microdesc
10972 consensus. This information makes it easier for IPv6 clients to
10973 bootstrap and choose reachable entry guards. Implements ticket 23826.
10974 - Add consensus method 28, which removes IPv6 ORPorts from
10975 microdescriptors. Now that the consensus contains IPv6 ORPorts, they
10976 are redundant in microdescs. This change will be used by Tor clients
10977 on 0.2.8.x and later. (That is to say, with all Tor clients that
10978 have IPv6 bootstrap and guard support.) Implements ticket 23828.
10979 - Expand the documentation for AuthDirHasIPv6Connectivity when it is
10980 set by different numbers of authorities. Fixes 23870
10983 o Major features (onion service v3, control port):
10984 - The control port now supports commands and events for v3 onion
10985 services. It is now possible to create ephemeral v3 services using
10986 ADD_ONION. Additionally, several events (HS_DESC, HS_DESC_CONTENT,
10987 CIRC and CIRC_MINOR) and commands (GETINFO, HSPOST, ADD_ONION and
10988 DEL_ONION) have been extended to support v3 onion services. Closes
10989 ticket 20699; implements proposal 284.
10991 o Major features (onion services):
10992 - Provide torrc options to pin the second and third hops of onion
10993 service circuits to a list of nodes. The option HSLayer2Guards
10994 pins the second hop, and the option HSLayer3Guards pins the third
10995 hop. These options are for use in conjunction with experiments
10996 with "vanguards" for preventing guard enumeration attacks. Closes
10999 o Major features (rust, portability, experimental):
11000 - Tor now ships with an optional implementation of one of its
11001 smaller modules (protover.c) in the Rust programming language. To
11002 try it out, install a Rust build environment, and configure Tor
11003 with "--enable-rust --enable-cargo-online-mode". This should not
11004 cause any user-visible changes, but should help us gain more
11005 experience with Rust, and plan future Rust integration work.
11006 Implementation by Chelsea Komlo. Closes ticket 22840.
11008 o Minor features (storage, configuration):
11009 - Users can store cached directory documents somewhere other than
11010 the DataDirectory by using the CacheDirectory option. Similarly,
11011 the storage location for relay's keys can be overridden with the
11012 KeyDirectory option. Closes ticket 22703.
11014 o Major features (v3 onion services, ipv6):
11015 - When v3 onion service clients send introduce cells, they now
11016 include the IPv6 address of the rendezvous point, if it has one.
11017 Current v3 onion services running 0.3.2 ignore IPv6 addresses, but
11018 in future Tor versions, IPv6-only v3 single onion services will be
11019 able to use IPv6 addresses to connect directly to the rendezvous
11020 point. Closes ticket 23577. Patch by Neel Chauhan.
11022 o Major bugfixes (onion services, retry behavior):
11023 - Fix an "off by 2" error in counting rendezvous failures on the
11024 onion service side. While we thought we would stop the rendezvous
11025 attempt after one failed circuit, we were actually making three
11026 circuit attempts before giving up. Now switch to a default of 2,
11027 and allow the consensus parameter "hs_service_max_rdv_failures" to
11028 override. Fixes bug 24895; bugfix on 0.0.6.
11029 - New-style (v3) onion services now obey the "max rendezvous circuit
11030 attempts" logic. Previously they would make as many rendezvous
11031 circuit attempts as they could fit in the MAX_REND_TIMEOUT second
11032 window before giving up. Fixes bug 24894; bugfix on 0.3.2.1-alpha.
11034 o Major bugfixes (relays):
11035 - Fix a set of false positives where relays would consider
11036 connections to other relays as being client-only connections (and
11037 thus e.g. deserving different link padding schemes) if those
11038 relays fell out of the consensus briefly. Now we look only at the
11039 initial handshake and whether the connection authenticated as a
11040 relay. Fixes bug 24898; bugfix on 0.3.1.1-alpha.
11042 o Minor feature (IPv6):
11043 - Make IPv6-only clients wait for microdescs for relays, even if we
11044 were previously using descriptors (or were using them as a bridge)
11045 and have a cached descriptor for them. Implements ticket 23827.
11046 - When a consensus has IPv6 ORPorts, make IPv6-only clients use
11047 them, rather than waiting to download microdescriptors.
11048 Implements ticket 23827.
11050 o Minor features (cleanup):
11051 - Tor now deletes the CookieAuthFile and ExtORPortCookieAuthFile
11052 when it stops. Closes ticket 23271.
11054 o Minor features (defensive programming):
11055 - Most of the functions in Tor that free objects have been replaced
11056 with macros that free the objects and set the corresponding
11057 pointers to NULL. This change should help prevent a large class of
11058 dangling pointer bugs. Closes ticket 24337.
11059 - Where possible, the tor_free() macro now only evaluates its input
11060 once. Part of ticket 24337.
11061 - Check that microdesc ed25519 ids are non-zero in
11062 node_get_ed25519_id() before returning them. Implements ticket
11063 24001, patch by "aruna1234".
11065 o Minor features (embedding):
11066 - Tor can now start with a preauthenticated control connection
11067 created by the process that launched it. This feature is meant for
11068 use by programs that want to launch and manage a Tor process
11069 without allowing other programs to manage it as well. For more
11070 information, see the __OwningControllerFD option documented in
11071 control-spec.txt. Closes ticket 23900.
11072 - On most errors that would cause Tor to exit, it now tries to
11073 return from the tor_main() function, rather than calling the
11074 system exit() function. Most users won't notice a difference here,
11075 but it should be significant for programs that run Tor inside
11076 a separate thread: they should now be able to survive Tor's exit
11077 conditions rather than having Tor shut down the entire process.
11078 Closes ticket 23848.
11079 - Applications that want to embed Tor can now tell Tor not to
11080 register any of its own POSIX signal handlers, using the
11081 __DisableSignalHandlers option. Closes ticket 24588.
11083 o Minor features (fallback directory list):
11084 - Avoid selecting fallbacks that change their IP addresses too
11085 often. Select more fallbacks by ignoring the Guard flag, and
11086 allowing lower cutoffs for the Running and V2Dir flags. Also allow
11087 a lower bandwidth, and a higher number of fallbacks per operator
11088 (5% of the list). Implements ticket 24785.
11089 - Update the fallback whitelist and blacklist based on opt-ins and
11090 relay changes. Closes tickets 22321, 24678, 22527, 24135,
11093 o Minor features (fallback directory mirror configuration):
11094 - Add a nickname to each fallback in a C comment. This makes it
11095 easier for operators to find their relays, and allows stem to use
11096 nicknames to identify fallbacks. Implements ticket 24600.
11097 - Add a type and version header to the fallback directory mirror
11098 file. Also add a delimiter to the end of each fallback entry. This
11099 helps external parsers like stem and Relay Search. Implements
11101 - Add an extrainfo cache flag for each fallback in a C comment. This
11102 allows stem to use fallbacks to fetch extra-info documents, rather
11103 than using authorities. Implements ticket 22759.
11104 - Add the generateFallbackDirLine.py script for automatically
11105 generating fallback directory mirror lines from relay fingerprints.
11106 No more typos! Add the lookupFallbackDirContact.py script for
11107 automatically looking up operator contact info from relay
11108 fingerprints. Implements ticket 24706, patch by teor and atagar.
11109 - Reject any fallback directory mirror that serves an expired
11110 consensus. Implements ticket 20942, patch by "minik".
11111 - Remove commas and equals signs from external string inputs to the
11112 fallback list. This avoids format confusion attacks. Implements
11114 - Remove the "weight=10" line from fallback directory mirror
11115 entries. Ticket 24681 will maintain the current fallback weights
11116 by changing Tor's default fallback weight to 10. Implements
11118 - Stop logging excessive information about fallback netblocks.
11119 Implements ticket 24791.
11121 o Minor features (forward-compatibility):
11122 - If a relay supports some link authentication protocol that we do
11123 not recognize, then include that relay's ed25519 key when telling
11124 other relays to extend to it. Previously, we treated future
11125 versions as if they were too old to support ed25519 link
11126 authentication. Closes ticket 20895.
11128 o Minor features (heartbeat):
11129 - Add onion service information to our heartbeat logs, displaying
11130 stats about the activity of configured onion services. Closes
11133 o Minor features (instrumentation, development):
11134 - Add the MainloopStats option to allow developers to get
11135 instrumentation information from the main event loop via the
11136 heartbeat messages. We hope to use this to improve Tor's behavior
11137 when it's trying to sleep. Closes ticket 24605.
11139 o Minor features (log messages):
11140 - Improve a warning message that happens when we fail to re-parse an
11141 old router because of an expired certificate. Closes ticket 20020.
11142 - Make the log more quantitative when we hit MaxMemInQueues
11143 threshold exposing some values. Closes ticket 24501.
11145 o Minor features (logging, android):
11146 - Added support for the Android logging subsystem. Closes
11149 o Minor features (performance):
11150 - Support predictive circuit building for onion service circuits
11151 with multiple layers of guards. Closes ticket 23101.
11152 - Use stdatomic.h where available, rather than mutexes, to implement
11153 atomic_counter_t. Closes ticket 23953.
11155 o Minor features (performance, 32-bit):
11156 - Improve performance on 32-bit systems by avoiding 64-bit division
11157 when calculating the timestamp in milliseconds for channel padding
11158 computations. Implements ticket 24613.
11159 - Improve performance on 32-bit systems by avoiding 64-bit division
11160 when timestamping cells and buffer chunks for OOM calculations.
11161 Implements ticket 24374.
11163 o Minor features (performance, OSX, iOS):
11164 - Use the mach_approximate_time() function (when available) to
11165 implement coarse monotonic time. Having a coarse time function
11166 should avoid a large number of system calls, and improve
11167 performance slightly, especially under load. Closes ticket 24427.
11169 o Minor features (performance, windows):
11170 - Improve performance on Windows Vista and Windows 7 by adjusting
11171 TCP send window size according to the recommendation from
11172 SIO_IDEAL_SEND_BACKLOG_QUERY. Closes ticket 22798. Patch
11175 o Major features (relay):
11176 - Implement an option, ReducedExitPolicy, to allow an Tor exit relay
11177 operator to use a more reasonable ("reduced") exit policy, rather
11178 than the default one. If you want to run an exit node without
11179 thinking too hard about which ports to allow, this one is for you.
11180 Closes ticket 13605. Patch from Neel Chauhan.
11182 o Minor features (testing, debugging, embedding):
11183 - For development purposes, Tor now has a mode in which it runs for
11184 a few seconds, then stops, and starts again without exiting the
11185 process. This mode is meant to help us debug various issues with
11186 ticket 23847. To use this feature, compile with
11187 --enable-restart-debugging, and set the TOR_DEBUG_RESTART
11188 environment variable. This is expected to crash a lot, and is
11189 really meant for developers only. It will likely be removed in a
11190 future release. Implements ticket 24583.
11192 o Minor bugfix (network IPv6 test):
11193 - Tor's test scripts now check if "ping -6 ::1" works when the user
11194 runs "make test-network-all". Fixes bug 24677; bugfix on
11195 0.2.9.3-alpha. Patch by "ffmancera".
11197 o Minor bugfixes (build, rust):
11198 - Fix output of autoconf checks to display success messages for Rust
11199 dependencies and a suitable rustc compiler version. Fixes bug
11200 24612; bugfix on 0.3.1.3-alpha.
11201 - When building with Rust on OSX, link against libresolv, to work
11202 around the issue at https://github.com/rust-lang/rust/issues/46797.
11203 Fixes bug 24652; bugfix on 0.3.1.1-alpha.
11204 - Don't pass the --quiet option to cargo: it seems to suppress some
11205 errors, which is not what we want to do when building. Fixes bug
11206 24518; bugfix on 0.3.1.7.
11207 - Build correctly when building from outside Tor's source tree with
11208 the TOR_RUST_DEPENDENCIES option set. Fixes bug 22768; bugfix
11211 o Minor bugfixes (directory authorities, IPv6):
11212 - When creating a routerstatus (vote) from a routerinfo (descriptor),
11213 set the IPv6 address to the unspecified IPv6 address, and
11214 explicitly initialize the port to zero. Fixes bug 24488; bugfix
11217 o Minor bugfixes (fallback directory mirrors):
11218 - Make updateFallbackDirs.py search harder for python. (Some OSs
11219 don't put it in /usr/bin.) Fixes bug 24708; bugfix
11222 o Minor bugfixes (hibernation, bandwidth accounting, shutdown):
11223 - When hibernating, close connections normally and allow them to
11224 flush. Fixes bug 23571; bugfix on 0.2.4.7-alpha. Also fixes
11226 - Do not attempt to launch self-reachability tests when entering
11227 hibernation. Fixes a case of bug 12062; bugfix on 0.0.9pre5.
11228 - Resolve several bugs related to descriptor fetching on bridge
11229 clients with bandwidth accounting enabled. (This combination is
11230 not recommended!) Fixes a case of bug 12062; bugfix
11232 - When hibernating, do not attempt to launch DNS checks. Fixes a
11233 case of bug 12062; bugfix on 0.1.2.2-alpha.
11234 - When hibernating, do not try to upload or download descriptors.
11235 Fixes a case of bug 12062; bugfix on 0.0.9pre5.
11237 o Minor bugfixes (IPv6, bridges):
11238 - Tor now always sets IPv6 preferences for bridges. Fixes bug 24573;
11239 bugfix on 0.2.8.2-alpha.
11240 - Tor now sets IPv6 address in the routerstatus as well as in the
11241 router descriptors when updating addresses for a bridge. Closes
11242 ticket 24572; bugfix on 0.2.4.5-alpha. Patch by "ffmancera".
11244 o Minor bugfixes (linux seccomp2 sandbox):
11245 - When running with the sandbox enabled, reload configuration files
11246 correctly even when %include was used. Previously we would crash.
11247 Fixes bug 22605; bugfix on 0.3.1. Patch from Daniel Pinto.
11249 o Minor bugfixes (memory leaks):
11250 - Avoid possible at-exit memory leaks related to use of Libevent's
11251 event_base_once() function. (This function tends to leak memory if
11252 the event_base is closed before the event fires.) Fixes bug 24584;
11253 bugfix on 0.2.8.1-alpha.
11254 - Fix a harmless memory leak in tor-resolve. Fixes bug 24582; bugfix
11257 o Minor bugfixes (OSX):
11258 - Don't exit the Tor process if setrlimit() fails to change the file
11259 limit (which can happen sometimes on some versions of OSX). Fixes
11260 bug 21074; bugfix on 0.0.9pre5.
11262 o Minor bugfixes (performance, fragile-hardening):
11263 - Improve the performance of our consensus-diff application code
11264 when Tor is built with the --enable-fragile-hardening option set.
11265 Fixes bug 24826; bugfix on 0.3.1.1-alpha.
11267 o Minor bugfixes (performance, timeouts):
11268 - Consider circuits for timeout as soon as they complete a hop. This
11269 is more accurate than applying the timeout in
11270 circuit_expire_building() because that function is only called
11271 once per second, which is now too slow for typical timeouts on the
11272 current network. Fixes bug 23114; bugfix on 0.2.2.2-alpha.
11273 - Use onion service circuits (and other circuits longer than 3 hops)
11274 to calculate a circuit build timeout. Previously, Tor only
11275 calculated its build timeout based on circuits that planned to be
11276 exactly 3 hops long. With this change, we include measurements
11277 from all circuits at the point where they complete their third
11278 hop. Fixes bug 23100; bugfix on 0.2.2.2-alpha.
11280 o Minor bugfixes (testing):
11281 - Give out Exit flags in bootstrapping networks. Fixes bug 24137;
11282 bugfix on 0.2.3.1-alpha.
11283 - Fix a memory leak in the scheduler/loop_kist unit test. Fixes bug
11284 25005; bugfix on 0.3.2.7-rc.
11286 o Code simplification and refactoring:
11287 - Remove /usr/athena from search path in configure.ac. Closes
11289 - Remove duplicate code in node_has_curve25519_onion_key() and
11290 node_get_curve25519_onion_key(), and add a check for a zero
11291 microdesc curve25519 onion key. Closes ticket 23966, patch by
11292 "aruna1234" and teor.
11293 - Rewrite channel_rsa_id_group_set_badness to reduce temporary
11294 memory allocations with large numbers of OR connections (e.g.
11295 relays). Closes ticket 24119.
11296 - Separate the function that deletes ephemeral files when Tor
11298 - Small changes to Tor's buf_t API to make it suitable for use as a
11299 general-purpose safe string constructor. Closes ticket 22342.
11300 - Switch -Wnormalized=id to -Wnormalized=nfkc in configure.ac to
11301 avoid source code identifier confusion. Closes ticket 24467.
11302 - The tor_git_revision[] constant no longer needs to be redeclared
11303 by everything that links against the rest of Tor. Done as part of
11304 ticket 23845, to simplify our external API.
11305 - We make extend_info_from_node() use node_get_curve25519_onion_key()
11306 introduced in ticket 23577 to access the curve25519 public keys
11307 rather than accessing it directly. Closes ticket 23760. Patch by
11309 - Add a function to log channels' scheduler state changes to aid
11310 debugging efforts. Closes ticket 24531.
11313 - Add documentation on how to build tor with Rust dependencies
11314 without having to be online. Closes ticket 22907; bugfix
11316 - Clarify the behavior of RelayBandwidth{Rate,Burst} with client
11317 traffic. Closes ticket 24318.
11318 - Document that OutboundBindAddress doesn't apply to DNS requests.
11319 Closes ticket 22145. Patch from Aruna Maurya.
11320 - Document that operators who run more than one relay or bridge are
11321 expected to set MyFamily and ContactInfo correctly. Closes
11324 o Code simplification and refactoring (channels):
11325 - Remove the incoming and outgoing channel queues. These were never
11326 used, but still took up a step in our fast path.
11327 - The majority of the channel unit tests have been rewritten and the
11328 code coverage has now been raised to 83.6% for channel.c. Closes
11330 - Remove other dead code from the channel subsystem: All together,
11331 this cleanup has removed more than 1500 lines of code overall and
11332 adding very little except for unit test.
11334 o Code simplification and refactoring (circuit rendezvous):
11335 - Split the client-side rendezvous circuit lookup into two
11336 functions: one that returns only established circuits and another
11337 that returns all kinds of circuits. Closes ticket 23459.
11339 o Code simplification and refactoring (controller):
11340 - Make most of the variables in networkstatus_getinfo_by_purpose()
11341 const. Implements ticket 24489.
11344 Changes in version 0.3.2.9 - 2018-01-09
11345 Tor 0.3.2.9 is the first stable release in the 0.3.2 series.
11347 The 0.3.2 series includes our long-anticipated new onion service
11348 design, with numerous security features. (For more information, see
11349 our blog post at https://blog.torproject.org/fall-harvest.) We also
11350 have a new circuit scheduler algorithm for improved performance on
11351 relays everywhere (see https://blog.torproject.org/kist-and-tell),
11352 along with many smaller features and bugfixes.
11354 Per our stable release policy, we plan to support each stable release
11355 series for at least the next nine months, or for three months after
11356 the first stable release of the next series: whichever is longer. If
11357 you need a release with long-term support, we recommend that you stay
11358 with the 0.2.9 series.
11360 Below is a list of the changes since 0.3.2.8-rc. For a list of all
11361 changes since 0.3.1, see the ReleaseNotes file.
11363 o Minor features (fallback directory mirrors):
11364 - The fallback directory list has been re-generated based on the
11365 current status of the network. Tor uses fallback directories to
11366 bootstrap when it doesn't yet have up-to-date directory
11367 information. Closes ticket 24801.
11368 - Make the default DirAuthorityFallbackRate 0.1, so that clients
11369 prefer to bootstrap from fallback directory mirrors. This is a
11370 follow-up to 24679, which removed weights from the default
11371 fallbacks. Implements ticket 24681.
11373 o Minor features (geoip):
11374 - Update geoip and geoip6 to the January 5 2018 Maxmind GeoLite2
11377 o Minor bugfixes (address selection):
11378 - When the fascist_firewall_choose_address_ functions don't find a
11379 reachable address, set the returned address to the null address
11380 and port. This is a precautionary measure, because some callers do
11381 not check the return value. Fixes bug 24736; bugfix
11384 o Minor bugfixes (compilation):
11385 - Resolve a few shadowed-variable warnings in the onion service
11386 code. Fixes bug 24634; bugfix on 0.3.2.1-alpha.
11388 o Minor bugfixes (portability, msvc):
11389 - Fix a bug in the bit-counting parts of our timing-wheel code on
11390 MSVC. (Note that MSVC is still not a supported build platform, due
11391 to cryptographic timing channel risks.) Fixes bug 24633; bugfix
11395 Changes in version 0.3.2.8-rc - 2017-12-21
11396 Tor 0.3.2.8-rc fixes a pair of bugs in the KIST and KISTLite
11397 schedulers that had led servers under heavy load to overload their
11398 outgoing connections. All relay operators running earlier 0.3.2.x
11399 versions should upgrade. This version also includes a mitigation for
11400 over-full DESTROY queues leading to out-of-memory conditions: if it
11401 works, we will soon backport it to earlier release series.
11403 This is the second release candidate in the 0.3.2 series. If we find
11404 no new bugs or regression here, then the first stable 0.3.2 release
11405 will be nearly identical to this.
11407 o Major bugfixes (KIST, scheduler):
11408 - The KIST scheduler did not correctly account for data already
11409 enqueued in each connection's send socket buffer, particularly in
11410 cases when the TCP/IP congestion window was reduced between
11411 scheduler calls. This situation lead to excessive per-connection
11412 buffering in the kernel, and a potential memory DoS. Fixes bug
11413 24665; bugfix on 0.3.2.1-alpha.
11415 o Minor features (geoip):
11416 - Update geoip and geoip6 to the December 6 2017 Maxmind GeoLite2
11419 o Minor bugfixes (hidden service v3):
11420 - Bump hsdir_spread_store parameter from 3 to 4 in order to increase
11421 the probability of reaching a service for a client missing
11422 microdescriptors. Fixes bug 24425; bugfix on 0.3.2.1-alpha.
11424 o Minor bugfixes (memory usage):
11425 - When queuing DESTROY cells on a channel, only queue the circuit-id
11426 and reason fields: not the entire 514-byte cell. This fix should
11427 help mitigate any bugs or attacks that fill up these queues, and
11428 free more RAM for other uses. Fixes bug 24666; bugfix
11431 o Minor bugfixes (scheduler, KIST):
11432 - Use a sane write limit for KISTLite when writing onto a connection
11433 buffer instead of using INT_MAX and shoving as much as it can.
11434 Because the OOM handler cleans up circuit queues, we are better
11435 off at keeping them in that queue instead of the connection's
11436 buffer. Fixes bug 24671; bugfix on 0.3.2.1-alpha.
11439 Changes in version 0.3.2.7-rc - 2017-12-14
11440 Tor 0.3.2.7-rc fixes various bugs in earlier versions of Tor,
11441 including some that could affect reliability or correctness.
11443 This is the first release candidate in the 0.3.2 series. If we find no
11444 new bugs or regression here, then the first stable 0.3.2. release will
11445 be nearly identical to this.
11447 o Major bugfixes (circuit prediction):
11448 - Fix circuit prediction logic so that a client doesn't treat a port
11449 as being "handled" by a circuit if that circuit already has
11450 isolation settings on it. This change should make Tor clients more
11451 responsive by improving their chances of having a pre-created
11452 circuit ready for use when a request arrives. Fixes bug 18859;
11453 bugfix on 0.2.3.3-alpha.
11455 o Minor features (logging):
11456 - Provide better warnings when the getrandom() syscall fails. Closes
11459 o Minor features (portability):
11460 - Tor now compiles correctly on arm64 with libseccomp-dev installed.
11461 (It doesn't yet work with the sandbox enabled.) Closes
11464 o Minor bugfixes (bridge clients, bootstrap):
11465 - Retry directory downloads when we get our first bridge descriptor
11466 during bootstrap or while reconnecting to the network. Keep
11467 retrying every time we get a bridge descriptor, until we have a
11468 reachable bridge. Fixes part of bug 24367; bugfix on 0.2.0.3-alpha.
11469 - Stop delaying bridge descriptor fetches when we have cached bridge
11470 descriptors. Instead, only delay bridge descriptor fetches when we
11471 have at least one reachable bridge. Fixes part of bug 24367;
11472 bugfix on 0.2.0.3-alpha.
11473 - Stop delaying directory fetches when we have cached bridge
11474 descriptors. Instead, only delay bridge descriptor fetches when
11475 all our bridges are definitely unreachable. Fixes part of bug
11476 24367; bugfix on 0.2.0.3-alpha.
11478 o Minor bugfixes (compilation):
11479 - Fix a signed/unsigned comparison warning introduced by our fix to
11480 TROVE-2017-009. Fixes bug 24480; bugfix on 0.2.5.16.
11482 o Minor bugfixes (correctness):
11483 - Fix several places in our codebase where a C compiler would be
11484 likely to eliminate a check, based on assuming that undefined
11485 behavior had not happened elsewhere in the code. These cases are
11486 usually a sign of redundant checking or dubious arithmetic. Found
11487 by Georg Koppen using the "STACK" tool from Wang, Zeldovich,
11488 Kaashoek, and Solar-Lezama. Fixes bug 24423; bugfix on various
11491 o Minor bugfixes (onion service v3):
11492 - Fix a race where an onion service would launch a new intro circuit
11493 after closing an old one, but fail to register it before freeing
11494 the previously closed circuit. This bug was making the service
11495 unable to find the established intro circuit and thus not upload
11496 its descriptor, thus making a service unavailable for up to 24
11497 hours. Fixes bug 23603; bugfix on 0.3.2.1-alpha.
11499 o Minor bugfixes (scheduler, KIST):
11500 - Properly set the scheduler state of an unopened channel in the
11501 KIST scheduler main loop. This prevents a harmless but annoying
11502 log warning. Fixes bug 24502; bugfix on 0.3.2.4-alpha.
11503 - Avoid a possible integer overflow when computing the available
11504 space on the TCP buffer of a channel. This had no security
11505 implications; but could make KIST allow too many cells on a
11506 saturated connection. Fixes bug 24590; bugfix on 0.3.2.1-alpha.
11507 - Downgrade to "info" a harmless warning about the monotonic time
11508 moving backwards: This can happen on platform not supporting
11509 monotonic time. Fixes bug 23696; bugfix on 0.3.2.1-alpha.
11512 Changes in version 0.3.2.6-alpha - 2017-12-01
11513 This version of Tor is the latest in the 0.3.2 alpha series. It
11514 includes fixes for several important security issues. All Tor users
11515 should upgrade to this release, or to one of the other releases coming
11518 o Major bugfixes (security):
11519 - Fix a denial of service bug where an attacker could use a
11520 malformed directory object to cause a Tor instance to pause while
11521 OpenSSL would try to read a passphrase from the terminal. (Tor
11522 instances run without a terminal, which is the case for most Tor
11523 packages, are not impacted.) Fixes bug 24246; bugfix on every
11524 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
11525 Found by OSS-Fuzz as testcase 6360145429790720.
11526 - Fix a denial of service issue where an attacker could crash a
11527 directory authority using a malformed router descriptor. Fixes bug
11528 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
11530 - When checking for replays in the INTRODUCE1 cell data for a
11531 (legacy) onion service, correctly detect replays in the RSA-
11532 encrypted part of the cell. We were previously checking for
11533 replays on the entire cell, but those can be circumvented due to
11534 the malleability of Tor's legacy hybrid encryption. This fix helps
11535 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
11536 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
11539 o Major bugfixes (security, onion service v2):
11540 - Fix a use-after-free error that could crash v2 Tor onion services
11541 when they failed to open circuits while expiring introduction
11542 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
11543 also tracked as TROVE-2017-013 and CVE-2017-8823.
11545 o Major bugfixes (security, relay):
11546 - When running as a relay, make sure that we never build a path
11547 through ourselves, even in the case where we have somehow lost the
11548 version of our descriptor appearing in the consensus. Fixes part
11549 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
11550 as TROVE-2017-012 and CVE-2017-8822.
11551 - When running as a relay, make sure that we never choose ourselves
11552 as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This
11553 issue is also tracked as TROVE-2017-012 and CVE-2017-8822.
11555 o Minor feature (relay statistics):
11556 - Change relay bandwidth reporting stats interval from 4 hours to 24
11557 hours in order to reduce the efficiency of guard discovery
11558 attacks. Fixes ticket 23856.
11560 o Minor features (directory authority):
11561 - Add an IPv6 address for the "bastet" directory authority. Closes
11564 o Minor bugfixes (client):
11565 - By default, do not enable storage of client-side DNS values. These
11566 values were unused by default previously, but they should not have
11567 been cached at all. Fixes bug 24050; bugfix on 0.2.6.3-alpha.
11570 Changes in version 0.3.1.9 - 2017-12-01:
11571 Tor 0.3.1.9 backports important security and stability fixes from the
11572 0.3.2 development series. All Tor users should upgrade to this
11573 release, or to another of the releases coming out today.
11575 o Major bugfixes (security, backport from 0.3.2.6-alpha):
11576 - Fix a denial of service bug where an attacker could use a
11577 malformed directory object to cause a Tor instance to pause while
11578 OpenSSL would try to read a passphrase from the terminal. (Tor
11579 instances run without a terminal, which is the case for most Tor
11580 packages, are not impacted.) Fixes bug 24246; bugfix on every
11581 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
11582 Found by OSS-Fuzz as testcase 6360145429790720.
11583 - Fix a denial of service issue where an attacker could crash a
11584 directory authority using a malformed router descriptor. Fixes bug
11585 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
11587 - When checking for replays in the INTRODUCE1 cell data for a
11588 (legacy) onion service, correctly detect replays in the RSA-
11589 encrypted part of the cell. We were previously checking for
11590 replays on the entire cell, but those can be circumvented due to
11591 the malleability of Tor's legacy hybrid encryption. This fix helps
11592 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
11593 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
11596 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
11597 - Fix a use-after-free error that could crash v2 Tor onion services
11598 when they failed to open circuits while expiring introduction
11599 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
11600 also tracked as TROVE-2017-013 and CVE-2017-8823.
11602 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
11603 - When running as a relay, make sure that we never build a path
11604 through ourselves, even in the case where we have somehow lost the
11605 version of our descriptor appearing in the consensus. Fixes part
11606 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
11607 as TROVE-2017-012 and CVE-2017-8822.
11608 - When running as a relay, make sure that we never choose ourselves
11609 as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This
11610 issue is also tracked as TROVE-2017-012 and CVE-2017-8822.
11612 o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha):
11613 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
11614 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
11615 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
11616 identifying and finding a workaround to this bug and to Moritz,
11617 Arthur Edelstein, and Roger for helping to track it down and
11620 o Minor features (bridge):
11621 - Bridges now include notice in their descriptors that they are
11622 bridges, and notice of their distribution status, based on their
11623 publication settings. Implements ticket 18329. For more fine-
11624 grained control of how a bridge is distributed, upgrade to 0.3.2.x
11627 o Minor features (directory authority, backport from 0.3.2.6-alpha):
11628 - Add an IPv6 address for the "bastet" directory authority. Closes
11631 o Minor features (geoip):
11632 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
11635 o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha):
11636 - Avoid unnecessary calls to directory_fetches_from_authorities() on
11637 relays, to prevent spurious address resolutions and descriptor
11638 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
11639 bugfix on in 0.2.8.1-alpha.
11641 o Minor bugfixes (compilation, backport from 0.3.2.1-alpha):
11642 - Fix unused variable warnings in donna's Curve25519 SSE2 code.
11643 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
11645 o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha):
11646 - When a circuit is marked for close, do not attempt to package any
11647 cells for channels on that circuit. Previously, we would detect
11648 this condition lower in the call stack, when we noticed that the
11649 circuit had no attached channel, and log an annoying message.
11650 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
11652 o Minor bugfixes (onion service, backport from 0.3.2.5-alpha):
11653 - Rename the consensus parameter "hsdir-interval" to "hsdir_interval"
11654 so it matches dir-spec.txt. Fixes bug 24262; bugfix
11657 o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha):
11658 - Avoid a crash when transitioning from client mode to bridge mode.
11659 Previously, we would launch the worker threads whenever our
11660 "public server" mode changed, but not when our "server" mode
11661 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
11664 Changes in version 0.3.0.13 - 2017-12-01
11665 Tor 0.3.0.13 backports important security and stability bugfixes from
11666 later Tor releases. All Tor users should upgrade to this release, or
11667 to another of the releases coming out today.
11669 Note: the Tor 0.3.0 series will no longer be supported after 26 Jan
11670 2018. If you need a release with long-term support, please stick with
11671 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
11673 o Major bugfixes (security, backport from 0.3.2.6-alpha):
11674 - Fix a denial of service bug where an attacker could use a
11675 malformed directory object to cause a Tor instance to pause while
11676 OpenSSL would try to read a passphrase from the terminal. (Tor
11677 instances run without a terminal, which is the case for most Tor
11678 packages, are not impacted.) Fixes bug 24246; bugfix on every
11679 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
11680 Found by OSS-Fuzz as testcase 6360145429790720.
11681 - Fix a denial of service issue where an attacker could crash a
11682 directory authority using a malformed router descriptor. Fixes bug
11683 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
11685 - When checking for replays in the INTRODUCE1 cell data for a
11686 (legacy) onion service, correctly detect replays in the RSA-
11687 encrypted part of the cell. We were previously checking for
11688 replays on the entire cell, but those can be circumvented due to
11689 the malleability of Tor's legacy hybrid encryption. This fix helps
11690 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
11691 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
11694 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
11695 - Fix a use-after-free error that could crash v2 Tor onion services
11696 when they failed to open circuits while expiring introduction
11697 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
11698 also tracked as TROVE-2017-013 and CVE-2017-8823.
11700 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
11701 - When running as a relay, make sure that we never build a path
11702 through ourselves, even in the case where we have somehow lost the
11703 version of our descriptor appearing in the consensus. Fixes part
11704 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
11705 as TROVE-2017-012 and CVE-2017-8822.
11706 - When running as a relay, make sure that we never choose ourselves
11707 as a guard. Fixes part of bug 21534; bugfix on 0.3.0.1-alpha. This
11708 issue is also tracked as TROVE-2017-012 and CVE-2017-8822.
11710 o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha):
11711 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
11712 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
11713 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
11714 identifying and finding a workaround to this bug and to Moritz,
11715 Arthur Edelstein, and Roger for helping to track it down and
11718 o Minor features (security, windows, backport from 0.3.1.1-alpha):
11719 - Enable a couple of pieces of Windows hardening: one
11720 (HeapEnableTerminationOnCorruption) that has been on-by-default
11721 since Windows 8, and unavailable before Windows 7; and one
11722 (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't
11723 affect us, but shouldn't do any harm. Closes ticket 21953.
11725 o Minor features (bridge, backport from 0.3.1.9):
11726 - Bridges now include notice in their descriptors that they are
11727 bridges, and notice of their distribution status, based on their
11728 publication settings. Implements ticket 18329. For more fine-
11729 grained control of how a bridge is distributed, upgrade to 0.3.2.x
11732 o Minor features (directory authority, backport from 0.3.2.6-alpha):
11733 - Add an IPv6 address for the "bastet" directory authority. Closes
11736 o Minor features (geoip):
11737 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
11740 o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha):
11741 - Avoid unnecessary calls to directory_fetches_from_authorities() on
11742 relays, to prevent spurious address resolutions and descriptor
11743 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
11744 bugfix on in 0.2.8.1-alpha.
11746 o Minor bugfixes (compilation, backport from 0.3.2.1-alpha):
11747 - Fix unused variable warnings in donna's Curve25519 SSE2 code.
11748 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
11750 o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha):
11751 - When a circuit is marked for close, do not attempt to package any
11752 cells for channels on that circuit. Previously, we would detect
11753 this condition lower in the call stack, when we noticed that the
11754 circuit had no attached channel, and log an annoying message.
11755 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
11757 o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha):
11758 - Avoid a crash when transitioning from client mode to bridge mode.
11759 Previously, we would launch the worker threads whenever our
11760 "public server" mode changed, but not when our "server" mode
11761 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
11763 o Minor bugfixes (testing, backport from 0.3.1.6-rc):
11764 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
11765 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
11768 Changes in version 0.2.9.14 - 2017-12-01
11769 Tor 0.3.0.13 backports important security and stability bugfixes from
11770 later Tor releases. All Tor users should upgrade to this release, or
11771 to another of the releases coming out today.
11773 o Major bugfixes (exit relays, DNS, backport from 0.3.2.4-alpha):
11774 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
11775 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
11776 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
11777 identifying and finding a workaround to this bug and to Moritz,
11778 Arthur Edelstein, and Roger for helping to track it down and
11781 o Major bugfixes (security, backport from 0.3.2.6-alpha):
11782 - Fix a denial of service bug where an attacker could use a
11783 malformed directory object to cause a Tor instance to pause while
11784 OpenSSL would try to read a passphrase from the terminal. (Tor
11785 instances run without a terminal, which is the case for most Tor
11786 packages, are not impacted.) Fixes bug 24246; bugfix on every
11787 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
11788 Found by OSS-Fuzz as testcase 6360145429790720.
11789 - Fix a denial of service issue where an attacker could crash a
11790 directory authority using a malformed router descriptor. Fixes bug
11791 24245; bugfix on 0.2.9.4-alpha. Also tracked as TROVE-2017-010
11793 - When checking for replays in the INTRODUCE1 cell data for a
11794 (legacy) onion service, correctly detect replays in the RSA-
11795 encrypted part of the cell. We were previously checking for
11796 replays on the entire cell, but those can be circumvented due to
11797 the malleability of Tor's legacy hybrid encryption. This fix helps
11798 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
11799 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
11802 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
11803 - Fix a use-after-free error that could crash v2 Tor onion services
11804 when they failed to open circuits while expiring introduction
11805 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
11806 also tracked as TROVE-2017-013 and CVE-2017-8823.
11808 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
11809 - When running as a relay, make sure that we never build a path
11810 through ourselves, even in the case where we have somehow lost the
11811 version of our descriptor appearing in the consensus. Fixes part
11812 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
11813 as TROVE-2017-012 and CVE-2017-8822.
11815 o Minor features (bridge, backport from 0.3.1.9):
11816 - Bridges now include notice in their descriptors that they are
11817 bridges, and notice of their distribution status, based on their
11818 publication settings. Implements ticket 18329. For more fine-
11819 grained control of how a bridge is distributed, upgrade to 0.3.2.x
11822 o Minor features (directory authority, backport from 0.3.2.6-alpha):
11823 - Add an IPv6 address for the "bastet" directory authority. Closes
11826 o Minor features (geoip):
11827 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
11830 o Minor features (security, windows, backport from 0.3.1.1-alpha):
11831 - Enable a couple of pieces of Windows hardening: one
11832 (HeapEnableTerminationOnCorruption) that has been on-by-default
11833 since Windows 8, and unavailable before Windows 7; and one
11834 (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't
11835 affect us, but shouldn't do any harm. Closes ticket 21953.
11837 o Minor bugfix (relay address resolution, backport from 0.3.2.1-alpha):
11838 - Avoid unnecessary calls to directory_fetches_from_authorities() on
11839 relays, to prevent spurious address resolutions and descriptor
11840 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
11841 bugfix on in 0.2.8.1-alpha.
11843 o Minor bugfixes (compilation, backport from 0.3.2.1-alpha):
11844 - Fix unused variable warnings in donna's Curve25519 SSE2 code.
11845 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
11847 o Minor bugfixes (logging, relay shutdown, annoyance, backport from 0.3.2.2-alpha):
11848 - When a circuit is marked for close, do not attempt to package any
11849 cells for channels on that circuit. Previously, we would detect
11850 this condition lower in the call stack, when we noticed that the
11851 circuit had no attached channel, and log an annoying message.
11852 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
11854 o Minor bugfixes (relay, crash, backport from 0.3.2.4-alpha):
11855 - Avoid a crash when transitioning from client mode to bridge mode.
11856 Previously, we would launch the worker threads whenever our
11857 "public server" mode changed, but not when our "server" mode
11858 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
11860 o Minor bugfixes (testing, backport from 0.3.1.6-rc):
11861 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
11862 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
11865 Changes in version 0.2.8.17 - 2017-12-01
11866 Tor 0.2.8.17 backports important security and stability bugfixes from
11867 later Tor releases. All Tor users should upgrade to this release, or
11868 to another of the releases coming out today.
11870 Note: the Tor 0.2.8 series will no longer be supported after 1 Jan
11871 2018. If you need a release with long-term support, please upgrade with
11872 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
11874 o Major bugfixes (security, backport from 0.3.2.6-alpha):
11875 - Fix a denial of service bug where an attacker could use a
11876 malformed directory object to cause a Tor instance to pause while
11877 OpenSSL would try to read a passphrase from the terminal. (Tor
11878 instances run without a terminal, which is the case for most Tor
11879 packages, are not impacted.) Fixes bug 24246; bugfix on every
11880 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
11881 Found by OSS-Fuzz as testcase 6360145429790720.
11882 - When checking for replays in the INTRODUCE1 cell data for a
11883 (legacy) onion service, correctly detect replays in the RSA-
11884 encrypted part of the cell. We were previously checking for
11885 replays on the entire cell, but those can be circumvented due to
11886 the malleability of Tor's legacy hybrid encryption. This fix helps
11887 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
11888 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
11891 o Major bugfixes (security, onion service v2, backport from 0.3.2.6-alpha):
11892 - Fix a use-after-free error that could crash v2 Tor onion services
11893 when they failed to open circuits while expiring introduction
11894 points. Fixes bug 24313; bugfix on 0.2.7.2-alpha. This issue is
11895 also tracked as TROVE-2017-013 and CVE-2017-8823.
11897 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
11898 - When running as a relay, make sure that we never build a path through
11899 ourselves, even in the case where we have somehow lost the version of
11900 our descriptor appearing in the consensus. Fixes part of bug 21534;
11901 bugfix on 0.2.0.1-alpha. This issue is also tracked as TROVE-2017-012
11904 o Minor features (bridge, backport from 0.3.1.9):
11905 - Bridges now include notice in their descriptors that they are
11906 bridges, and notice of their distribution status, based on their
11907 publication settings. Implements ticket 18329. For more fine-
11908 grained control of how a bridge is distributed, upgrade to 0.3.2.x
11911 o Minor features (directory authority, backport from 0.3.2.6-alpha):
11912 - Add an IPv6 address for the "bastet" directory authority. Closes
11915 o Minor features (geoip):
11916 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
11919 o Minor bugfixes (testing, backport from 0.3.1.6-rc):
11920 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
11921 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
11924 Changes in version 0.2.5.16 - 2017-12-01
11925 Tor 0.2.5.13 backports important security and stability bugfixes from
11926 later Tor releases. All Tor users should upgrade to this release, or
11927 to another of the releases coming out today.
11929 Note: the Tor 0.2.5 series will no longer be supported after 1 May
11930 2018. If you need a release with long-term support, please upgrade to
11931 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
11933 o Major bugfixes (security, backport from 0.3.2.6-alpha):
11934 - Fix a denial of service bug where an attacker could use a
11935 malformed directory object to cause a Tor instance to pause while
11936 OpenSSL would try to read a passphrase from the terminal. (Tor
11937 instances run without a terminal, which is the case for most Tor
11938 packages, are not impacted.) Fixes bug 24246; bugfix on every
11939 version of Tor. Also tracked as TROVE-2017-011 and CVE-2017-8821.
11940 Found by OSS-Fuzz as testcase 6360145429790720.
11941 - When checking for replays in the INTRODUCE1 cell data for a
11942 (legacy) onion service, correctly detect replays in the RSA-
11943 encrypted part of the cell. We were previously checking for
11944 replays on the entire cell, but those can be circumvented due to
11945 the malleability of Tor's legacy hybrid encryption. This fix helps
11946 prevent a traffic confirmation attack. Fixes bug 24244; bugfix on
11947 0.2.4.1-alpha. This issue is also tracked as TROVE-2017-009
11950 o Major bugfixes (security, relay, backport from 0.3.2.6-alpha):
11951 - When running as a relay, make sure that we never build a path
11952 through ourselves, even in the case where we have somehow lost the
11953 version of our descriptor appearing in the consensus. Fixes part
11954 of bug 21534; bugfix on 0.2.0.1-alpha. This issue is also tracked
11955 as TROVE-2017-012 and CVE-2017-8822.
11957 o Minor features (bridge, backport from 0.3.1.9):
11958 - Bridges now include notice in their descriptors that they are
11959 bridges, and notice of their distribution status, based on their
11960 publication settings. Implements ticket 18329. For more fine-
11961 grained control of how a bridge is distributed, upgrade to 0.3.2.x
11964 o Minor features (geoip):
11965 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
11969 Changes in version 0.3.2.5-alpha - 2017-11-22
11970 Tor 0.3.2.5-alpha is the fifth alpha release in the 0.3.2.x series. It
11971 fixes several stability and reliability bugs, including a fix for
11972 intermittent bootstrapping failures that some people have been seeing
11973 since the 0.3.0.x series.
11975 Please test this alpha out -- many of these fixes will soon be
11976 backported to stable Tor versions if no additional bugs are found
11979 o Major bugfixes (bootstrapping):
11980 - Fetch descriptors aggressively whenever we lack enough to build
11981 circuits, regardless of how many descriptors we are missing.
11982 Previously, we would delay launching the fetch when we had fewer
11983 than 15 missing descriptors, even if some of those descriptors
11984 were blocking circuits from building. Fixes bug 23985; bugfix on
11985 0.1.1.11-alpha. The effects of this bug became worse in
11986 0.3.0.3-alpha, when we began treating missing descriptors from our
11987 primary guards as a reason to delay circuits.
11988 - Don't try fetching microdescriptors from relays that have failed
11989 to deliver them in the past. Fixes bug 23817; bugfix
11992 o Minor features (directory authority):
11993 - Make the "Exit" flag assignment only depend on whether the exit
11994 policy allows connections to ports 80 and 443. Previously relays
11995 would get the Exit flag if they allowed connections to one of
11996 these ports and also port 6667. Resolves ticket 23637.
11998 o Minor features (geoip):
11999 - Update geoip and geoip6 to the November 6 2017 Maxmind GeoLite2
12002 o Minor features (linux seccomp2 sandbox):
12003 - Update the sandbox rules so that they should now work correctly
12004 with Glibc 2.26. Closes ticket 24315.
12006 o Minor features (logging):
12007 - Downgrade a pair of log messages that could occur when an exit's
12008 resolver gave us an unusual (but not forbidden) response. Closes
12010 - Improve the message we log when re-enabling circuit build timeouts
12011 after having received a consensus. Closes ticket 20963.
12013 o Minor bugfixes (compilation):
12014 - Fix a memory leak warning in one of the libevent-related
12015 configuration tests that could occur when manually specifying
12016 -fsanitize=address. Fixes bug 24279; bugfix on 0.3.0.2-alpha.
12017 Found and patched by Alex Xu.
12018 - When detecting OpenSSL on Windows from our configure script, make
12019 sure to try linking with the ws2_32 library. Fixes bug 23783;
12020 bugfix on 0.3.2.2-alpha.
12022 o Minor bugfixes (control port, linux seccomp2 sandbox):
12023 - Avoid a crash when attempting to use the seccomp2 sandbox together
12024 with the OwningControllerProcess feature. Fixes bug 24198; bugfix
12027 o Minor bugfixes (control port, onion services):
12028 - Report "FAILED" instead of "UPLOAD_FAILED" "FAILED" for the
12029 HS_DESC event when a service is not able to upload a descriptor.
12030 Fixes bug 24230; bugfix on 0.2.7.1-alpha.
12032 o Minor bugfixes (directory cache):
12033 - Recover better from empty or corrupt files in the consensus cache
12034 directory. Fixes bug 24099; bugfix on 0.3.1.1-alpha.
12035 - When a consensus diff calculation is only partially successful,
12036 only record the successful parts as having succeeded. Partial
12037 success can happen if (for example) one compression method fails
12038 but the others succeed. Previously we misrecorded all the
12039 calculations as having succeeded, which would later cause a
12040 nonfatal assertion failure. Fixes bug 24086; bugfix
12043 o Minor bugfixes (logging):
12044 - Only log once if we notice that KIST support is gone. Fixes bug
12045 24158; bugfix on 0.3.2.1-alpha.
12046 - Suppress a log notice when relay descriptors arrive. We already
12047 have a bootstrap progress for this so no need to log notice
12048 everytime tor receives relay descriptors. Microdescriptors behave
12049 the same. Fixes bug 23861; bugfix on 0.2.8.2-alpha.
12051 o Minor bugfixes (network layer):
12052 - When closing a connection via close_connection_immediately(), we
12053 mark it as "not blocked on bandwidth", to prevent later calls from
12054 trying to unblock it, and give it permission to read. This fixes a
12055 backtrace warning that can happen on relays under various
12056 circumstances. Fixes bug 24167; bugfix on 0.1.0.1-rc.
12058 o Minor bugfixes (onion services):
12059 - The introduction circuit was being timed out too quickly while
12060 waiting for the rendezvous circuit to complete. Keep the intro
12061 circuit around longer instead of timing out and reopening new ones
12062 constantly. Fixes bug 23681; bugfix on 0.2.4.8-alpha.
12063 - Rename the consensus parameter "hsdir-interval" to "hsdir_interval"
12064 so it matches dir-spec.txt. Fixes bug 24262; bugfix
12066 - Silence a warning about failed v3 onion descriptor uploads that
12067 can happen naturally under certain edge cases. Fixes part of bug
12068 23662; bugfix on 0.3.2.1-alpha.
12070 o Minor bugfixes (tests):
12071 - Fix a memory leak in one of the bridge-distribution test cases.
12072 Fixes bug 24345; bugfix on 0.3.2.3-alpha.
12073 - Fix a bug in our fuzzing mock replacement for crypto_pk_checksig(),
12074 to correctly handle cases where a caller gives it an RSA key of
12075 under 160 bits. (This is not actually a bug in Tor itself, but
12076 rather in our fuzzing code.) Fixes bug 24247; bugfix on
12077 0.3.0.3-alpha. Found by OSS-Fuzz as issue 4177.
12080 - Add notes in man page regarding OS support for the various
12081 scheduler types. Attempt to use less jargon in the scheduler
12082 section. Closes ticket 24254.
12085 Changes in version 0.3.2.4-alpha - 2017-11-08
12086 Tor 0.3.2.4-alpha is the fourth alpha release in the 0.3.2.x series.
12087 It fixes several stability and reliability bugs, especially including
12088 a major reliability issue that has been plaguing fast exit relays in
12091 o Major bugfixes (exit relays, DNS):
12092 - Fix an issue causing DNS to fail on high-bandwidth exit nodes,
12093 making them nearly unusable. Fixes bugs 21394 and 18580; bugfix on
12094 0.1.2.2-alpha, which introduced eventdns. Thanks to Dhalgren for
12095 identifying and finding a workaround to this bug and to Moritz,
12096 Arthur Edelstein, and Roger for helping to track it down and
12099 o Major bugfixes (scheduler, channel):
12100 - Stop processing scheduled channels if they closed while flushing
12101 cells. This can happen if the write on the connection fails
12102 leading to the channel being closed while in the scheduler loop.
12103 Fixes bug 23751; bugfix on 0.3.2.1-alpha.
12105 o Minor features (logging, scheduler):
12106 - Introduce a SCHED_BUG() function to log extra information about
12107 the scheduler state if we ever catch a bug in the scheduler.
12108 Closes ticket 23753.
12110 o Minor features (removed deprecations):
12111 - The ClientDNSRejectInternalAddresses flag can once again be set in
12112 non-testing Tor networks, so long as they do not use the default
12113 directory authorities. This change also removes the deprecation of
12114 this flag from 0.2.9.2-alpha. Closes ticket 21031.
12116 o Minor features (testing):
12117 - Our fuzzing tests now test the encrypted portions of v3 onion
12118 service descriptors. Implements more of 21509.
12120 o Minor bugfixes (directory client):
12121 - On failure to download directory information, delay retry attempts
12122 by a random amount based on the "decorrelated jitter" algorithm.
12123 Our previous delay algorithm tended to produce extra-long delays
12124 too easily. Fixes bug 23816; bugfix on 0.2.9.1-alpha.
12126 o Minor bugfixes (IPv6, v3 single onion services):
12127 - Remove buggy code for IPv6-only v3 single onion services, and
12128 reject attempts to configure them. This release supports IPv4,
12129 dual-stack, and IPv6-only v3 onion services; and IPv4 and dual-
12130 stack v3 single onion services. Fixes bug 23820; bugfix
12133 o Minor bugfixes (logging, relay):
12134 - Give only a protocol warning when the ed25519 key is not
12135 consistent between the descriptor and microdescriptor of a relay.
12136 This can happen, for instance, if the relay has been flagged
12137 NoEdConsensus. Fixes bug 24025; bugfix on 0.3.2.1-alpha.
12139 o Minor bugfixes (manpage, onion service):
12140 - Document that the HiddenServiceNumIntroductionPoints option is
12141 0-10 for v2 services and 0-20 for v3 services. Fixes bug 24115;
12142 bugfix on 0.3.2.1-alpha.
12144 o Minor bugfixes (memory leaks):
12145 - Fix a minor memory leak at exit in the KIST scheduler. This bug
12146 should have no user-visible impact. Fixes bug 23774; bugfix
12148 - Fix a memory leak when decrypting a badly formatted v3 onion
12149 service descriptor. Fixes bug 24150; bugfix on 0.3.2.1-alpha.
12150 Found by OSS-Fuzz; this is OSS-Fuzz issue 3994.
12152 o Minor bugfixes (onion services):
12153 - Cache some needed onion service client information instead of
12154 constantly computing it over and over again. Fixes bug 23623;
12155 bugfix on 0.3.2.1-alpha.
12156 - Properly retry HSv3 descriptor fetches when missing required
12157 directory information. Fixes bug 23762; bugfix on 0.3.2.1-alpha.
12159 o Minor bugfixes (path selection):
12160 - When selecting relays by bandwidth, avoid a rounding error that
12161 could sometimes cause load to be imbalanced incorrectly.
12162 Previously, we would always round upwards; now, we round towards
12163 the nearest integer. This had the biggest effect when a relay's
12164 weight adjustments should have given it weight 0, but it got
12165 weight 1 instead. Fixes bug 23318; bugfix on 0.2.4.3-alpha.
12166 - When calculating the fraction of nodes that have descriptors, and
12167 all nodes in the network have zero bandwidths, count the number of
12168 nodes instead. Fixes bug 23318; bugfix on 0.2.4.10-alpha.
12169 - Actually log the total bandwidth in compute_weighted_bandwidths().
12170 Fixes bug 24170; bugfix on 0.2.4.3-alpha.
12172 o Minor bugfixes (relay, crash):
12173 - Avoid a crash when transitioning from client mode to bridge mode.
12174 Previously, we would launch the worker threads whenever our
12175 "public server" mode changed, but not when our "server" mode
12176 changed. Fixes bug 23693; bugfix on 0.2.6.3-alpha.
12178 o Minor bugfixes (testing):
12179 - Fix a spurious fuzzing-only use of an uninitialized value. Found
12180 by Brian Carpenter. Fixes bug 24082; bugfix on 0.3.0.3-alpha.
12181 - Test that IPv6-only clients can use microdescriptors when running
12182 "make test-network-all". Requires chutney master 61c28b9 or later.
12183 Closes ticket 24109.
12186 Changes in version 0.3.2.3-alpha - 2017-10-27
12187 Tor 0.3.2.3-alpha is the third release in the 0.3.2 series. It fixes
12188 numerous small bugs in earlier versions of 0.3.2.x, and adds a new
12189 directory authority, Bastet.
12191 o Directory authority changes:
12192 - Add "Bastet" as a ninth directory authority to the default list.
12193 Closes ticket 23910.
12194 - The directory authority "Longclaw" has changed its IP address.
12195 Closes ticket 23592.
12197 o Minor features (bridge):
12198 - Bridge relays can now set the BridgeDistribution config option to
12199 add a "bridge-distribution-request" line to their bridge
12200 descriptor, which tells BridgeDB how they'd like their bridge
12201 address to be given out. (Note that as of Oct 2017, BridgeDB does
12202 not yet implement this feature.) As a side benefit, this feature
12203 provides a way to distinguish bridge descriptors from non-bridge
12204 descriptors. Implements tickets 18329.
12206 o Minor features (client, entry guards):
12207 - Improve log messages when missing descriptors for primary guards.
12208 Resolves ticket 23670.
12210 o Minor features (geoip):
12211 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
12214 o Minor bugfixes (bridge):
12215 - Overwrite the bridge address earlier in the process of retrieving
12216 its descriptor, to make sure we reach it on the configured
12217 address. Fixes bug 20532; bugfix on 0.2.0.10-alpha.
12219 o Minor bugfixes (documentation):
12220 - Document better how to read gcov, and what our gcov postprocessing
12221 scripts do. Fixes bug 23739; bugfix on 0.2.9.1-alpha.
12223 o Minor bugfixes (entry guards):
12224 - Tor now updates its guard state when it reads a consensus
12225 regardless of whether it's missing descriptors. That makes tor use
12226 its primary guards to fetch descriptors in some edge cases where
12227 it would previously have used fallback directories. Fixes bug
12228 23862; bugfix on 0.3.0.1-alpha.
12230 o Minor bugfixes (hidden service client):
12231 - When handling multiple SOCKS request for the same .onion address,
12232 only fetch the service descriptor once.
12233 - When a descriptor fetch fails with a non-recoverable error, close
12234 all pending SOCKS requests for that .onion. Fixes bug 23653;
12235 bugfix on 0.3.2.1-alpha.
12237 o Minor bugfixes (hidden service):
12238 - Always regenerate missing hidden service public key files. Prior
12239 to this, if the public key was deleted from disk, it wouldn't get
12240 recreated. Fixes bug 23748; bugfix on 0.3.2.2-alpha. Patch
12242 - Make sure that we have a usable ed25519 key when the intro point
12243 relay supports ed25519 link authentication. Fixes bug 24002;
12244 bugfix on 0.3.2.1-alpha.
12246 o Minor bugfixes (hidden service, v2):
12247 - When reloading configured hidden services, copy all information
12248 from the old service object. Previously, some data was omitted,
12249 causing delays in descriptor upload, and other bugs. Fixes bug
12250 23790; bugfix on 0.2.1.9-alpha.
12252 o Minor bugfixes (memory safety, defensive programming):
12253 - Clear the target address when node_get_prim_orport() returns
12254 early. Fixes bug 23874; bugfix on 0.2.8.2-alpha.
12256 o Minor bugfixes (relay):
12257 - Avoid a BUG warning when receiving a dubious CREATE cell while an
12258 option transition is in progress. Fixes bug 23952; bugfix
12261 o Minor bugfixes (testing):
12262 - Adjust the GitLab CI configuration to more closely match that of
12263 Travis CI. Fixes bug 23757; bugfix on 0.3.2.2-alpha.
12264 - Prevent scripts/test/coverage from attempting to move gcov output
12265 to the root directory. Fixes bug 23741; bugfix on 0.2.5.1-alpha.
12266 - When running unit tests as root, skip a test that would fail
12267 because it expects a permissions error. This affects some
12268 continuous integration setups. Fixes bug 23758; bugfix
12270 - Stop unconditionally mirroring the tor repository in GitLab CI.
12271 This prevented developers from enabling GitLab CI on master. Fixes
12272 bug 23755; bugfix on 0.3.2.2-alpha.
12273 - Fix the hidden service v3 descriptor decoding fuzzing to use the
12274 latest decoding API correctly. Fixes bug 21509; bugfix
12277 o Minor bugfixes (warnings):
12278 - When we get an HTTP request on a SOCKS port, tell the user about
12279 the new HTTPTunnelPort option. Previously, we would give a "Tor is
12280 not an HTTP Proxy" message, which stopped being true when
12281 HTTPTunnelPort was introduced. Fixes bug 23678; bugfix
12285 Changes in version 0.2.5.15 - 2017-10-25
12286 Tor 0.2.5.15 backports a collection of bugfixes from later Tor release
12287 series. It also adds a new directory authority, Bastet.
12289 Note: the Tor 0.2.5 series will no longer be supported after 1 May
12290 2018. If you need a release with long-term support, please upgrade to
12291 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
12293 o Directory authority changes:
12294 - Add "Bastet" as a ninth directory authority to the default list.
12295 Closes ticket 23910.
12296 - The directory authority "Longclaw" has changed its IP address.
12297 Closes ticket 23592.
12299 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
12300 - Avoid an assertion failure bug affecting our implementation of
12301 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
12302 handling of "0xx" differs from what we had expected. Fixes bug
12303 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
12305 o Minor features (geoip):
12306 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
12309 o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha):
12310 - Fix a memset() off the end of an array when packing cells. This
12311 bug should be harmless in practice, since the corrupted bytes are
12312 still in the same structure, and are always padding bytes,
12313 ignored, or immediately overwritten, depending on compiler
12314 behavior. Nevertheless, because the memset()'s purpose is to make
12315 sure that any other cell-handling bugs can't expose bytes to the
12316 network, we need to fix it. Fixes bug 22737; bugfix on
12317 0.2.4.11-alpha. Fixes CID 1401591.
12319 o Build features (backport from 0.3.1.5-alpha):
12320 - Tor's repository now includes a Travis Continuous Integration (CI)
12321 configuration file (.travis.yml). This is meant to help new
12322 developers and contributors who fork Tor to a Github repository be
12323 better able to test their changes, and understand what we expect
12324 to pass. To use this new build feature, you must fork Tor to your
12325 Github account, then go into the "Integrations" menu in the
12326 repository settings for your fork and enable Travis, then push
12327 your changes. Closes ticket 22636.
12330 Changes in version 0.2.8.16 - 2017-10-25
12331 Tor 0.2.8.16 backports a collection of bugfixes from later Tor release
12332 series, including a bugfix for a crash issue that had affected relays
12333 under memory pressure. It also adds a new directory authority, Bastet.
12335 Note: the Tor 0.2.8 series will no longer be supported after 1 Jan
12336 2018. If you need a release with long-term support, please stick with
12337 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
12339 o Directory authority changes:
12340 - Add "Bastet" as a ninth directory authority to the default list.
12341 Closes ticket 23910.
12342 - The directory authority "Longclaw" has changed its IP address.
12343 Closes ticket 23592.
12345 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
12346 - Fix a timing-based assertion failure that could occur when the
12347 circuit out-of-memory handler freed a connection's output buffer.
12348 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
12350 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
12351 - Remove longclaw's IPv6 address, as it will soon change. Authority
12352 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
12353 3/8 directory authorities with IPv6 addresses, but there are also
12354 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
12356 o Minor features (geoip):
12357 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
12361 Changes in version 0.2.9.13 - 2017-10-25
12362 Tor 0.2.9.13 backports a collection of bugfixes from later Tor release
12363 series, including a bugfix for a crash issue that had affected relays
12364 under memory pressure. It also adds a new directory authority, Bastet.
12366 o Directory authority changes:
12367 - Add "Bastet" as a ninth directory authority to the default list.
12368 Closes ticket 23910.
12369 - The directory authority "Longclaw" has changed its IP address.
12370 Closes ticket 23592.
12372 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
12373 - Fix a timing-based assertion failure that could occur when the
12374 circuit out-of-memory handler freed a connection's output buffer.
12375 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
12377 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
12378 - Remove longclaw's IPv6 address, as it will soon change. Authority
12379 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
12380 3/8 directory authorities with IPv6 addresses, but there are also
12381 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
12383 o Minor features (geoip):
12384 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
12387 o Minor bugfixes (directory authority, backport from 0.3.1.5-alpha):
12388 - When a directory authority rejects a descriptor or extrainfo with
12389 a given digest, mark that digest as undownloadable, so that we do
12390 not attempt to download it again over and over. We previously
12391 tried to avoid downloading such descriptors by other means, but we
12392 didn't notice if we accidentally downloaded one anyway. This
12393 behavior became problematic in 0.2.7.2-alpha, when authorities
12394 began pinning Ed25519 keys. Fixes bug 22349; bugfix
12397 o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha):
12398 - Clear the address when node_get_prim_orport() returns early.
12399 Fixes bug 23874; bugfix on 0.2.8.2-alpha.
12401 o Minor bugfixes (Windows service, backport from 0.3.1.6-rc):
12402 - When running as a Windows service, set the ID of the main thread
12403 correctly. Failure to do so made us fail to send log messages to
12404 the controller in 0.2.1.16-rc, slowed down controller event
12405 delivery in 0.2.7.3-rc and later, and crash with an assertion
12406 failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha.
12407 Patch and diagnosis from "Vort".
12410 Changes in version 0.3.0.12 - 2017-10-25
12411 Tor 0.3.0.12 backports a collection of bugfixes from later Tor release
12412 series, including a bugfix for a crash issue that had affected relays
12413 under memory pressure. It also adds a new directory authority, Bastet.
12415 Note: the Tor 0.3.0 series will no longer be supported after 26 Jan
12416 2018. If you need a release with long-term support, please stick with
12417 the 0.2.9 series. Otherwise, please upgrade to 0.3.1 or later.
12419 o Directory authority changes:
12420 - Add "Bastet" as a ninth directory authority to the default list.
12421 Closes ticket 23910.
12422 - The directory authority "Longclaw" has changed its IP address.
12423 Closes ticket 23592.
12425 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
12426 - Fix a timing-based assertion failure that could occur when the
12427 circuit out-of-memory handler freed a connection's output buffer.
12428 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
12430 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
12431 - Remove longclaw's IPv6 address, as it will soon change. Authority
12432 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
12433 3/8 directory authorities with IPv6 addresses, but there are also
12434 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
12436 o Minor features (geoip):
12437 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
12440 o Minor bugfixes (directory authority, backport from 0.3.1.5-alpha):
12441 - When a directory authority rejects a descriptor or extrainfo with
12442 a given digest, mark that digest as undownloadable, so that we do
12443 not attempt to download it again over and over. We previously
12444 tried to avoid downloading such descriptors by other means, but we
12445 didn't notice if we accidentally downloaded one anyway. This
12446 behavior became problematic in 0.2.7.2-alpha, when authorities
12447 began pinning Ed25519 keys. Fixes bug 22349; bugfix
12450 o Minor bugfixes (hidden service, relay, backport from 0.3.2.2-alpha):
12451 - Avoid a possible double close of a circuit by the intro point on
12452 error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610;
12453 bugfix on 0.3.0.1-alpha.
12455 o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha):
12456 - Clear the address when node_get_prim_orport() returns early.
12457 Fixes bug 23874; bugfix on 0.2.8.2-alpha.
12459 o Minor bugfixes (Windows service, backport from 0.3.1.6-rc):
12460 - When running as a Windows service, set the ID of the main thread
12461 correctly. Failure to do so made us fail to send log messages to
12462 the controller in 0.2.1.16-rc, slowed down controller event
12463 delivery in 0.2.7.3-rc and later, and crash with an assertion
12464 failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha.
12465 Patch and diagnosis from "Vort".
12468 Changes in version 0.3.1.8 - 2017-10-25
12469 Tor 0.3.1.8 is the second stable release in the 0.3.1 series.
12470 It includes several bugfixes, including a bugfix for a crash issue
12471 that had affected relays under memory pressure. It also adds
12472 a new directory authority, Bastet.
12474 o Directory authority changes:
12475 - Add "Bastet" as a ninth directory authority to the default list.
12476 Closes ticket 23910.
12477 - The directory authority "Longclaw" has changed its IP address.
12478 Closes ticket 23592.
12480 o Major bugfixes (relay, crash, assertion failure, backport from 0.3.2.2-alpha):
12481 - Fix a timing-based assertion failure that could occur when the
12482 circuit out-of-memory handler freed a connection's output buffer.
12483 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
12485 o Minor features (directory authorities, backport from 0.3.2.2-alpha):
12486 - Remove longclaw's IPv6 address, as it will soon change. Authority
12487 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
12488 3/8 directory authorities with IPv6 addresses, but there are also
12489 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
12491 o Minor features (geoip):
12492 - Update geoip and geoip6 to the October 4 2017 Maxmind GeoLite2
12495 o Minor bugfixes (compilation, backport from 0.3.2.2-alpha):
12496 - Fix a compilation warning when building with zstd support on
12497 32-bit platforms. Fixes bug 23568; bugfix on 0.3.1.1-alpha. Found
12498 and fixed by Andreas Stieger.
12500 o Minor bugfixes (compression, backport from 0.3.2.2-alpha):
12501 - Handle a pathological case when decompressing Zstandard data when
12502 the output buffer size is zero. Fixes bug 23551; bugfix
12505 o Minor bugfixes (directory authority, backport from 0.3.2.1-alpha):
12506 - Remove the length limit on HTTP status lines that authorities can
12507 send in their replies. Fixes bug 23499; bugfix on 0.3.1.6-rc.
12509 o Minor bugfixes (hidden service, relay, backport from 0.3.2.2-alpha):
12510 - Avoid a possible double close of a circuit by the intro point on
12511 error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610;
12512 bugfix on 0.3.0.1-alpha.
12514 o Minor bugfixes (memory safety, backport from 0.3.2.3-alpha):
12515 - Clear the address when node_get_prim_orport() returns early.
12516 Fixes bug 23874; bugfix on 0.2.8.2-alpha.
12518 o Minor bugfixes (unit tests, backport from 0.3.2.2-alpha):
12519 - Fix additional channelpadding unit test failures by using mocked
12520 time instead of actual time for all tests. Fixes bug 23608; bugfix
12524 Changes in version 0.3.2.2-alpha - 2017-09-29
12525 Tor 0.3.2.2-alpha is the second release in the 0.3.2 series. This
12526 release fixes several minor bugs in the new scheduler and next-
12527 generation onion services; both features were newly added in the 0.3.2
12528 series. Other fixes in this alpha include several fixes for non-fatal
12529 tracebacks which would appear in logs.
12531 With the aim to stabilise the 0.3.2 series by 15 December 2017, this
12532 alpha does not contain any substantial new features. Minor features
12533 include better testing and logging.
12535 The following comprises the complete list of changes included
12538 o Major bugfixes (relay, crash, assertion failure):
12539 - Fix a timing-based assertion failure that could occur when the
12540 circuit out-of-memory handler freed a connection's output buffer.
12541 Fixes bug 23690; bugfix on 0.2.6.1-alpha.
12543 o Major bugfixes (scheduler):
12544 - If a channel is put into the scheduler's pending list, then it
12545 starts closing, and then if the scheduler runs before it finishes
12546 closing, the scheduler will get stuck trying to flush its cells
12547 while the lower layers refuse to cooperate. Fix that race
12548 condition by giving the scheduler an escape method. Fixes bug
12549 23676; bugfix on 0.3.2.1-alpha.
12551 o Minor features (build, compilation):
12552 - The "check-changes" feature is now part of the "make check" tests;
12553 we'll use it to try to prevent misformed changes files from
12554 accumulating. Closes ticket 23564.
12555 - Tor builds should now fail if there are any mismatches between the
12556 C type representing a configuration variable and the C type the
12557 data-driven parser uses to store a value there. Previously, we
12558 needed to check these by hand, which sometimes led to mistakes.
12559 Closes ticket 23643.
12561 o Minor features (directory authorities):
12562 - Remove longclaw's IPv6 address, as it will soon change. Authority
12563 IPv6 addresses were originally added in 0.2.8.1-alpha. This leaves
12564 3/8 directory authorities with IPv6 addresses, but there are also
12565 52 fallback directory mirrors with IPv6 addresses. Resolves 19760.
12567 o Minor features (hidden service, circuit, logging):
12568 - Improve logging of many callsite in the circuit subsystem to print
12569 the circuit identifier(s).
12570 - Log when we cleanup an intro point from a service so we know when
12571 and for what reason it happened. Closes ticket 23604.
12573 o Minor features (logging):
12574 - Log more circuit information whenever we are about to try to
12575 package a relay cell on a circuit with a nonexistent n_chan.
12576 Attempt to diagnose ticket 8185.
12577 - Improve info-level log identification of particular circuits, to
12578 help with debugging. Closes ticket 23645.
12580 o Minor features (relay):
12581 - When choosing which circuits can be expired as unused, consider
12582 circuits from clients even if those clients used regular CREATE
12583 cells to make them; and do not consider circuits from relays even
12584 if they were made with CREATE_FAST. Part of ticket 22805.
12586 o Minor features (robustness):
12587 - Change several fatal assertions when flushing buffers into non-
12588 fatal assertions, to prevent any recurrence of 23690.
12590 o Minor features (spec conformance, bridge, diagnostic):
12591 - When handling the USERADDR command on an ExtOrPort, warn when the
12592 transports provides a USERADDR with no port. In a future version,
12593 USERADDR commands of this format may be rejected. Detects problems
12594 related to ticket 23080.
12596 o Minor features (testing):
12597 - Add a unit test to make sure that our own generated platform
12598 string will be accepted by directory authorities. Closes
12601 o Minor bugfixes (bootstrapping):
12602 - When warning about state file clock skew, report the correct
12603 direction for the detected skew. Fixes bug 23606; bugfix
12605 - Avoid an assertion failure when logging a state file clock skew
12606 very early in bootstrapping. Fixes bug 23607; bugfix
12609 o Minor bugfixes (build, compilation):
12610 - Fix a compilation warning when building with zstd support on
12611 32-bit platforms. Fixes bug 23568; bugfix on 0.3.1.1-alpha. Found
12612 and fixed by Andreas Stieger.
12613 - When searching for OpenSSL, don't accept any OpenSSL library that
12614 lacks TLSv1_1_method(): Tor doesn't build with those versions.
12615 Additionally, look in /usr/local/opt/openssl, if it's present.
12616 These changes together repair the default build on OSX systems
12617 with Homebrew installed. Fixes bug 23602; bugfix on 0.2.7.2-alpha.
12619 o Minor bugfixes (compression):
12620 - Handle a pathological case when decompressing Zstandard data when
12621 the output buffer size is zero. Fixes bug 23551; bugfix
12624 o Minor bugfixes (documentation):
12625 - Fix manpage to not refer to the obsolete (and misspelled)
12626 UseEntryGuardsAsDirectoryGuards parameter in the description of
12627 NumDirectoryGuards. Fixes bug 23611; bugfix on 0.2.4.8-alpha.
12629 o Minor bugfixes (hidden service v3):
12630 - Don't log an assertion failure when we can't find the right
12631 information to extend to an introduction point. In rare cases,
12632 this could happen, causing a warning, even though tor would
12633 recover gracefully. Fixes bug 23159; bugfix on 0.3.2.1-alpha.
12634 - Pad RENDEZVOUS cell up to the size of the legacy cell which is
12635 much bigger so the rendezvous point can't distinguish which hidden
12636 service protocol is being used. Fixes bug 23420; bugfix
12639 o Minor bugfixes (hidden service, relay):
12640 - Avoid a possible double close of a circuit by the intro point on
12641 error of sending the INTRO_ESTABLISHED cell. Fixes bug 23610;
12642 bugfix on 0.3.0.1-alpha.
12644 o Minor bugfixes (logging, relay shutdown, annoyance):
12645 - When a circuit is marked for close, do not attempt to package any
12646 cells for channels on that circuit. Previously, we would detect
12647 this condition lower in the call stack, when we noticed that the
12648 circuit had no attached channel, and log an annoying message.
12649 Fixes bug 8185; bugfix on 0.2.5.4-alpha.
12651 o Minor bugfixes (scheduler):
12652 - When switching schedulers due to a consensus change, we didn't
12653 give the new scheduler a chance to react to the consensus. Fix
12654 that. Fixes bug 23537; bugfix on 0.3.2.1-alpha.
12655 - Make the KISTSchedRunInterval option a non negative value. With
12656 this, the way to disable KIST through the consensus is to set it
12657 to 0. Fixes bug 23539; bugfix on 0.3.2.1-alpha.
12658 - Only notice log the selected scheduler when we switch scheduler
12659 types. Fixes bug 23552; bugfix on 0.3.2.1-alpha.
12660 - Avoid a compilation warning on macOS in scheduler_ev_add() caused
12661 by a different tv_usec data type. Fixes bug 23575; bugfix
12663 - Make a hard exit if tor is unable to pick a scheduler which can
12664 happen if the user specifies a scheduler type that is not
12665 supported and not other types in Schedulers. Fixes bug 23581;
12666 bugfix on 0.3.2.1-alpha.
12667 - Properly initialize the scheduler last run time counter so it is
12668 not 0 at the first tick. Fixes bug 23696; bugfix on 0.3.2.1-alpha.
12670 o Minor bugfixes (testing):
12671 - Capture and detect several "Result does not fit" warnings in unit
12672 tests on platforms with 32-bit time_t. Fixes bug 21800; bugfix
12674 - Fix additional channelpadding unit test failures by using mocked
12675 time instead of actual time for all tests. Fixes bug 23608; bugfix
12677 - The removal of some old scheduler options caused some tests to
12678 fail on BSD systems. Assume current behavior is correct and make
12679 the tests pass again. Fixes bug 23566; bugfix on 0.3.2.1-alpha.
12681 o Code simplification and refactoring:
12682 - Remove various ways of testing circuits and connections for
12683 "clientness"; instead, favor channel_is_client(). Part of
12686 o Deprecated features:
12687 - The ReachableDirAddresses and ClientPreferIPv6DirPort options are
12688 now deprecated; they do not apply to relays, and they have had no
12689 effect on clients since 0.2.8.x. Closes ticket 19704.
12692 - HiddenServiceVersion man page entry wasn't mentioning the now
12693 supported version 3. Fixes ticket 23580; bugfix on 0.3.2.1-alpha.
12694 - Clarify that the Address option is entirely about setting an
12695 advertised IPv4 address. Closes ticket 18891.
12696 - Clarify the manpage's use of the term "address" to clarify what
12697 kind of address is intended. Closes ticket 21405.
12698 - Document that onion service subdomains are allowed, and ignored.
12699 Closes ticket 18736.
12702 Changes in version 0.3.2.1-alpha - 2017-09-18
12703 Tor 0.3.2.1-alpha is the first release in the 0.3.2.x series. It
12704 includes support for our next-generation ("v3") onion service
12705 protocol, and adds a new circuit scheduler for more responsive
12706 forwarding decisions from relays. There are also numerous other small
12707 features and bugfixes here.
12709 Below are the changes since Tor 0.3.1.7.
12711 o Major feature (scheduler, channel):
12712 - Tor now uses new schedulers to decide which circuits should
12713 deliver cells first, in order to improve congestion at relays. The
12714 first type is called "KIST" ("Kernel Informed Socket Transport"),
12715 and is only available on Linux-like systems: it uses feedback from
12716 the kernel to prevent the kernel's TCP buffers from growing too
12717 full. The second new scheduler type is called "KISTLite": it
12718 behaves the same as KIST, but runs on systems without kernel
12719 support for inspecting TCP implementation details. The old
12720 scheduler is still available, under the name "Vanilla". To change
12721 the default scheduler preference order, use the new "Schedulers"
12722 option. (The default preference order is "KIST,KISTLite,Vanilla".)
12724 Matt Traudt implemented KIST, based on research by Rob Jansen,
12725 John Geddes, Christ Wacek, Micah Sherr, and Paul Syverson. For
12726 more information, see the design paper at
12727 http://www.robgjansen.com/publications/kist-sec2014.pdf and the
12728 followup implementation paper at https://arxiv.org/abs/1709.01044.
12729 Closes ticket 12541.
12731 o Major features (next-generation onion services):
12732 - Tor now supports the next-generation onion services protocol for
12733 clients and services! As part of this release, the core of
12734 proposal 224 has been implemented and is available for
12735 experimentation and testing by our users. This newer version of
12736 onion services ("v3") features many improvements over the legacy
12739 a) Better crypto (replaced SHA1/DH/RSA1024
12740 with SHA3/ed25519/curve25519)
12742 b) Improved directory protocol, leaking much less information to
12745 c) Improved directory protocol, with smaller surface for
12748 d) Better onion address security against impersonation.
12750 e) More extensible introduction/rendezvous protocol.
12752 f) A cleaner and more modular codebase.
12754 You can identify a next-generation onion address by its length:
12755 they are 56 characters long, as in
12756 "4acth47i6kxnvkewtm6q7ib2s3ufpo5sqbsnzjpbi7utijcltosqemad.onion".
12758 In the future, we will release more options and features for v3
12759 onion services, but we first need a testing period, so that the
12760 current codebase matures and becomes more robust. Planned features
12761 include: offline keys, advanced client authorization, improved
12762 guard algorithms, and statistics. For full details, see
12765 Legacy ("v2") onion services will still work for the foreseeable
12766 future, and will remain the default until this new codebase gets
12767 tested and hardened. Service operators who want to experiment with
12768 the new system can use the 'HiddenServiceVersion 3' torrc
12769 directive along with the regular onion service configuration
12770 options. We will publish a blog post about this new feature
12773 o Major bugfixes (usability, control port):
12774 - Report trusted clock skew indications as bootstrap errors, so
12775 controllers can more easily alert users when their clocks are
12776 wrong. Fixes bug 23506; bugfix on 0.1.2.6-alpha.
12778 o Minor features (bug detection):
12779 - Log a warning message with a stack trace for any attempt to call
12780 get_options() during option validation. This pattern has caused
12781 subtle bugs in the past. Closes ticket 22281.
12783 o Minor features (client):
12784 - You can now use Tor as a tunneled HTTP proxy: use the new
12785 HTTPTunnelPort option to open a port that accepts HTTP CONNECT
12786 requests. Closes ticket 22407.
12787 - Add an extra check to make sure that we always use the newer guard
12788 selection code for picking our guards. Closes ticket 22779.
12789 - When downloading (micro)descriptors, don't split the list into
12790 multiple requests unless we want at least 32 descriptors.
12791 Previously, we split at 4, not 32, which led to significant
12792 overhead in HTTP request size and degradation in compression
12793 performance. Closes ticket 23220.
12795 o Minor features (command line):
12796 - Add a new commandline option, --key-expiration, which prints when
12797 the current signing key is going to expire. Implements ticket
12798 17639; patch by Isis Lovecruft.
12800 o Minor features (control port):
12801 - If an application tries to use the control port as an HTTP proxy,
12802 respond with a meaningful "This is the Tor control port" message,
12803 and log the event. Closes ticket 1667. Patch from Ravi
12805 - Provide better error message for GETINFO desc/(id|name) when not
12806 fetching router descriptors. Closes ticket 5847. Patch by
12808 - Add GETINFO "{desc,md}/download-enabled", to inform the controller
12809 whether Tor will try to download router descriptors and
12810 microdescriptors respectively. Closes ticket 22684.
12811 - Added new GETINFO targets "ip-to-country/{ipv4,ipv6}-available",
12812 so controllers can tell whether the geoip databases are loaded.
12813 Closes ticket 23237.
12814 - Adds a timestamp field to the CIRC_BW and STREAM_BW bandwidth
12815 events. Closes ticket 19254. Patch by "DonnchaC".
12817 o Minor features (development support):
12818 - Developers can now generate a call-graph for Tor using the
12819 "calltool" python program, which post-processes object dumps. It
12820 should work okay on many Linux and OSX platforms, and might work
12821 elsewhere too. To run it, install calltool from
12822 https://gitweb.torproject.org/user/nickm/calltool.git and run
12823 "make callgraph". Closes ticket 19307.
12825 o Minor features (ed25519):
12826 - Add validation function to checks for torsion components in
12827 ed25519 public keys, used by prop224 client-side code. Closes
12828 ticket 22006. Math help by Ian Goldberg.
12830 o Minor features (exit relay, DNS):
12831 - Improve the clarity and safety of the log message from evdns when
12832 receiving an apparently spoofed DNS reply. Closes ticket 3056.
12834 o Minor features (integration, hardening):
12835 - Add a new NoExec option to prevent Tor from running other
12836 programs. When this option is set to 1, Tor will never try to run
12837 another program, regardless of the settings of
12838 PortForwardingHelper, ClientTransportPlugin, or
12839 ServerTransportPlugin. Once NoExec is set, it cannot be disabled
12840 without restarting Tor. Closes ticket 22976.
12842 o Minor features (logging):
12843 - Improve the warning message for specifying a relay by nickname.
12844 The previous message implied that nickname registration was still
12845 part of the Tor network design, which it isn't. Closes
12847 - If the sandbox filter fails to load, suggest to the user that
12848 their kernel might not support seccomp2. Closes ticket 23090.
12850 o Minor features (portability):
12851 - Check at configure time whether uint8_t is the same type as
12852 unsigned char. Lots of existing code already makes this
12853 assumption, and there could be strict aliasing issues if the
12854 assumption is violated. Closes ticket 22410.
12856 o Minor features (relay, configuration):
12857 - Reject attempts to use relative file paths when RunAsDaemon is
12858 set. Previously, Tor would accept these, but the directory-
12859 changing step of RunAsDaemon would give strange and/or confusing
12860 results. Closes ticket 22731.
12862 o Minor features (startup, safety):
12863 - When configured to write a PID file, Tor now exits if it is unable
12864 to do so. Previously, it would warn and continue. Closes
12867 o Minor features (static analysis):
12868 - The BUG() macro has been changed slightly so that Coverity no
12869 longer complains about dead code if the bug is impossible. Closes
12872 o Minor features (testing):
12873 - The default chutney network tests now include tests for the v3
12874 hidden service design. Make sure you have the latest version of
12875 chutney if you want to run these. Closes ticket 22437.
12876 - Add a unit test to verify that we can parse a hardcoded v2 hidden
12877 service descriptor. Closes ticket 15554.
12879 o Minor bugfixes (certificate handling):
12880 - Fix a time handling bug in Tor certificates set to expire after
12881 the year 2106. Fixes bug 23055; bugfix on 0.3.0.1-alpha. Found by
12882 Coverity as CID 1415728.
12884 o Minor bugfixes (client, usability):
12885 - Refrain from needlessly rejecting SOCKS5-with-hostnames and
12886 SOCKS4a requests that contain IP address strings, even when
12887 SafeSocks in enabled, as this prevents user from connecting to
12888 known IP addresses without relying on DNS for resolving. SafeSocks
12889 still rejects SOCKS connections that connect to IP addresses when
12890 those addresses are _not_ encoded as hostnames. Fixes bug 22461;
12891 bugfix on Tor 0.2.6.2-alpha.
12893 o Minor bugfixes (code correctness):
12894 - Call htons() in extend_cell_format() for encoding a 16-bit value.
12895 Previously we used ntohs(), which happens to behave the same on
12896 all the platforms we support, but which isn't really correct.
12897 Fixes bug 23106; bugfix on 0.2.4.8-alpha.
12898 - For defense-in-depth, make the controller's write_escaped_data()
12899 function robust to extremely long inputs. Fixes bug 19281; bugfix
12900 on 0.1.1.1-alpha. Reported by Guido Vranken.
12902 o Minor bugfixes (compilation):
12903 - Fix unused-variable warnings in donna's Curve25519 SSE2 code.
12904 Fixes bug 22895; bugfix on 0.2.7.2-alpha.
12906 o Minor bugfixes (consensus expiry):
12907 - Check for adequate directory information correctly. Previously, Tor
12908 would reconsider whether it had sufficient directory information
12909 every 2 minutes. Fixes bug 23091; bugfix on 0.2.0.19-alpha.
12911 o Minor bugfixes (directory protocol):
12912 - Directory servers now include a "Date:" http header for response
12913 codes other than 200. Clients starting with a skewed clock and a
12914 recent consensus were getting "304 Not modified" responses from
12915 directory authorities, so without the Date header, the client
12916 would never hear about a wrong clock. Fixes bug 23499; bugfix
12918 - Make clients wait for 6 seconds before trying to download a
12919 consensus from an authority. Fixes bug 17750; bugfix
12922 o Minor bugfixes (DoS-resistance):
12923 - If future code asks if there are any running bridges, without
12924 checking if bridges are enabled, log a BUG warning rather than
12925 crashing. Fixes bug 23524; bugfix on 0.3.0.1-alpha.
12927 o Minor bugfixes (format strictness):
12928 - Restrict several data formats to decimal. Previously, the
12929 BuildTimeHistogram entries in the state file, the "bw=" entries in
12930 the bandwidth authority file, and the process IDs passed to the
12931 __OwningControllerProcess option could all be specified in hex or
12932 octal as well as in decimal. This was not an intentional feature.
12933 Fixes bug 22802; bugfixes on 0.2.2.1-alpha, 0.2.2.2-alpha,
12936 o Minor bugfixes (heartbeat):
12937 - If we fail to write a heartbeat message, schedule a retry for the
12938 minimum heartbeat interval number of seconds in the future. Fixes
12939 bug 19476; bugfix on 0.2.3.1-alpha.
12941 o Minor bugfixes (linux seccomp2 sandbox, logging):
12942 - Fix some messages on unexpected errors from the seccomp2 library.
12943 Fixes bug 22750; bugfix on 0.2.5.1-alpha. Patch from "cypherpunks".
12945 o Minor bugfixes (logging):
12946 - Remove duplicate log messages regarding opening non-local
12947 SocksPorts upon parsing config and opening listeners at startup.
12948 Fixes bug 4019; bugfix on 0.2.3.3-alpha.
12949 - Use a more comprehensible log message when telling the user
12950 they've excluded every running exit node. Fixes bug 7890; bugfix
12952 - When logging the number of descriptors we intend to download per
12953 directory request, do not log a number higher than then the number
12954 of descriptors we're fetching in total. Fixes bug 19648; bugfix
12956 - When warning about a directory owned by the wrong user, log the
12957 actual name of the user owning the directory. Previously, we'd log
12958 the name of the process owner twice. Fixes bug 23487; bugfix
12960 - The tor specification says hop counts are 1-based, so fix two log
12961 messages that mistakenly logged 0-based hop counts. Fixes bug
12962 18982; bugfix on 0.2.6.2-alpha and 0.2.4.5-alpha. Patch by teor.
12963 Credit to Xiaofan Li for reporting this issue.
12965 o Minor bugfixes (portability):
12966 - Stop using the PATH_MAX variable, which is not defined on GNU
12967 Hurd. Fixes bug 23098; bugfix on 0.3.1.1-alpha.
12969 o Minor bugfixes (relay):
12970 - When uploading our descriptor for the first time after startup,
12971 report the reason for uploading as "Tor just started" rather than
12972 leaving it blank. Fixes bug 22885; bugfix on 0.2.3.4-alpha.
12973 - Avoid unnecessary calls to directory_fetches_from_authorities() on
12974 relays, to prevent spurious address resolutions and descriptor
12975 rebuilds. This is a mitigation for bug 21789. Fixes bug 23470;
12976 bugfix on in 0.2.8.1-alpha.
12978 o Minor bugfixes (tests):
12979 - Fix a broken unit test for the OutboundAddress option: the parsing
12980 function was never returning an error on failure. Fixes bug 23366;
12981 bugfix on 0.3.0.3-alpha.
12982 - Fix a signed-integer overflow in the unit tests for
12983 dir/download_status_random_backoff, which was untriggered until we
12984 fixed bug 17750. Fixes bug 22924; bugfix on 0.2.9.1-alpha.
12986 o Minor bugfixes (usability, control port):
12987 - Stop making an unnecessary routerlist check in NETINFO clock skew
12988 detection; this was preventing clients from reporting NETINFO clock
12989 skew to controllers. Fixes bug 23532; bugfix on 0.2.4.4-alpha.
12991 o Code simplification and refactoring:
12992 - Extract the code for handling newly-open channels into a separate
12993 function from the general code to handle channel state
12994 transitions. This change simplifies our callgraph, reducing the
12995 size of the largest strongly connected component by roughly a
12996 factor of two. Closes ticket 22608.
12997 - Remove dead code for largely unused statistics on the number of
12998 times we've attempted various public key operations. Fixes bug
12999 19871; bugfix on 0.1.2.4-alpha. Fix by Isis Lovecruft.
13000 - Remove several now-obsolete functions for asking about old
13001 variants directory authority status. Closes ticket 22311; patch
13003 - Remove some of the code that once supported "Named" and "Unnamed"
13004 routers. Authorities no longer vote for these flags. Closes
13006 - Rename the obsolete malleable hybrid_encrypt functions used in TAP
13007 and old hidden services, to indicate that they aren't suitable for
13008 new protocols or formats. Closes ticket 23026.
13009 - Replace our STRUCT_OFFSET() macro with offsetof(). Closes ticket
13010 22521. Patch from Neel Chauhan.
13011 - Split the enormous circuit_send_next_onion_skin() function into
13012 multiple subfunctions. Closes ticket 22804.
13013 - Split the portions of the buffer.c module that handle particular
13014 protocols into separate modules. Part of ticket 23149.
13015 - Use our test macros more consistently, to produce more useful
13016 error messages when our unit tests fail. Add coccinelle patches to
13017 allow us to re-check for test macro uses. Closes ticket 22497.
13019 o Deprecated features:
13020 - Deprecate HTTPProxy/HTTPProxyAuthenticator config options. They
13021 only applies to direct unencrypted HTTP connections to your
13022 directory server, which your Tor probably isn't using. Closes
13026 - Clarify in the manual that "Sandbox 1" is only supported on Linux
13027 kernels. Closes ticket 22677.
13028 - Document all values of PublishServerDescriptor in the manpage.
13029 Closes ticket 15645.
13030 - Improve the documentation for the directory port part of the
13031 DirAuthority line. Closes ticket 20152.
13032 - Restore documentation for the authorities' "approved-routers"
13033 file. Closes ticket 21148.
13035 o Removed features:
13036 - The AllowDotExit option has been removed as unsafe. It has been
13037 deprecated since 0.2.9.2-alpha. Closes ticket 23426.
13038 - The ClientDNSRejectInternalAddresses flag can no longer be set on
13039 non-testing networks. It has been deprecated since 0.2.9.2-alpha.
13040 Closes ticket 21031.
13041 - The controller API no longer includes an AUTHDIR_NEWDESCS event:
13042 nobody was using it any longer. Closes ticket 22377.
13045 Changes in version 0.2.8.15 - 2017-09-18
13046 Tor 0.2.8.15 backports a collection of bugfixes from later
13049 Most significantly, it includes a fix for TROVE-2017-008, a
13050 security bug that affects hidden services running with the
13051 SafeLogging option disabled. For more information, see
13052 https://trac.torproject.org/projects/tor/ticket/23490
13054 Note that Tor 0.2.8.x will no longer be supported after 1 Jan
13055 2018. We suggest that you upgrade to the latest stable release if
13056 possible. If you can't, we recommend that you upgrade at least to
13057 0.2.9, which will be supported until 2020.
13059 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
13060 - Avoid an assertion failure bug affecting our implementation of
13061 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
13062 handling of "0xx" differs from what we had expected. Fixes bug
13063 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
13066 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
13069 o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha):
13070 - Backport a fix for an "unused variable" warning that appeared
13071 in some versions of mingw. Fixes bug 22838; bugfix on
13074 o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha):
13075 - Fix a memset() off the end of an array when packing cells. This
13076 bug should be harmless in practice, since the corrupted bytes are
13077 still in the same structure, and are always padding bytes,
13078 ignored, or immediately overwritten, depending on compiler
13079 behavior. Nevertheless, because the memset()'s purpose is to make
13080 sure that any other cell-handling bugs can't expose bytes to the
13081 network, we need to fix it. Fixes bug 22737; bugfix on
13082 0.2.4.11-alpha. Fixes CID 1401591.
13084 o Build features (backport from 0.3.1.5-alpha):
13085 - Tor's repository now includes a Travis Continuous Integration (CI)
13086 configuration file (.travis.yml). This is meant to help new
13087 developers and contributors who fork Tor to a Github repository be
13088 better able to test their changes, and understand what we expect
13089 to pass. To use this new build feature, you must fork Tor to your
13090 Github account, then go into the "Integrations" menu in the
13091 repository settings for your fork and enable Travis, then push
13092 your changes. Closes ticket 22636.
13095 Changes in version 0.2.9.12 - 2017-09-18
13096 Tor 0.2.9.12 backports a collection of bugfixes from later
13099 Most significantly, it includes a fix for TROVE-2017-008, a
13100 security bug that affects hidden services running with the
13101 SafeLogging option disabled. For more information, see
13102 https://trac.torproject.org/projects/tor/ticket/23490
13104 o Major features (security, backport from 0.3.0.2-alpha):
13105 - Change the algorithm used to decide DNS TTLs on client and server
13106 side, to better resist DNS-based correlation attacks like the
13107 DefecTor attack of Greschbach, Pulls, Roberts, Winter, and
13108 Feamster. Now relays only return one of two possible DNS TTL
13109 values, and clients are willing to believe DNS TTL values up to 3
13110 hours long. Closes ticket 19769.
13112 o Major bugfixes (crash, directory connections, backport from 0.3.0.5-rc):
13113 - Fix a rare crash when sending a begin cell on a circuit whose
13114 linked directory connection had already been closed. Fixes bug
13115 21576; bugfix on 0.2.9.3-alpha. Reported by Alec Muffett.
13117 o Major bugfixes (DNS, backport from 0.3.0.2-alpha):
13118 - Fix a bug that prevented exit nodes from caching DNS records for
13119 more than 60 seconds. Fixes bug 19025; bugfix on 0.2.4.7-alpha.
13121 o Major bugfixes (linux TPROXY support, backport from 0.3.1.1-alpha):
13122 - Fix a typo that had prevented TPROXY-based transparent proxying
13123 from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
13124 Patch from "d4fq0fQAgoJ".
13126 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
13127 - Avoid an assertion failure bug affecting our implementation of
13128 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
13129 handling of "0xx" differs from what we had expected. Fixes bug
13130 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
13132 o Minor features (code style, backport from 0.3.1.3-alpha):
13133 - Add "Falls through" comments to our codebase, in order to silence
13134 GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas
13135 Stieger. Closes ticket 22446.
13137 o Minor features (geoip):
13138 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
13141 o Minor bugfixes (bandwidth accounting, backport from 0.3.1.1-alpha):
13142 - Roll over monthly accounting at the configured hour and minute,
13143 rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1.
13144 Found by Andrey Karpov with PVS-Studio.
13146 o Minor bugfixes (compilation, backport from 0.3.1.5-alpha):
13147 - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug 22915;
13148 bugfix on 0.2.8.1-alpha.
13149 - Fix warnings when building with libscrypt and openssl scrypt support
13150 on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha.
13151 - When building with certain versions the mingw C header files, avoid
13152 float-conversion warnings when calling the C functions isfinite(),
13153 isnan(), and signbit(). Fixes bug 22801; bugfix on 0.2.8.1-alpha.
13155 o Minor bugfixes (compilation, backport from 0.3.1.7):
13156 - Avoid compiler warnings in the unit tests for running tor_sscanf()
13157 with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha.
13159 o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha):
13160 - Backport a fix for an "unused variable" warning that appeared
13161 in some versions of mingw. Fixes bug 22838; bugfix on
13164 o Minor bugfixes (controller, backport from 0.3.1.7):
13165 - Do not crash when receiving a HSPOST command with an empty body.
13166 Fixes part of bug 22644; bugfix on 0.2.7.1-alpha.
13167 - Do not crash when receiving a POSTDESCRIPTOR command with an
13168 empty body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha.
13170 o Minor bugfixes (coverity build support, backport from 0.3.1.5-alpha):
13171 - Avoid Coverity build warnings related to our BUG() macro. By
13172 default, Coverity treats BUG() as the Linux kernel does: an
13173 instant abort(). We need to override that so our BUG() macro
13174 doesn't prevent Coverity from analyzing functions that use it.
13175 Fixes bug 23030; bugfix on 0.2.9.1-alpha.
13177 o Minor bugfixes (defensive programming, undefined behavior, backport from 0.3.1.4-alpha):
13178 - Fix a memset() off the end of an array when packing cells. This
13179 bug should be harmless in practice, since the corrupted bytes are
13180 still in the same structure, and are always padding bytes,
13181 ignored, or immediately overwritten, depending on compiler
13182 behavior. Nevertheless, because the memset()'s purpose is to make
13183 sure that any other cell-handling bugs can't expose bytes to the
13184 network, we need to fix it. Fixes bug 22737; bugfix on
13185 0.2.4.11-alpha. Fixes CID 1401591.
13187 o Minor bugfixes (file limits, osx, backport from 0.3.1.5-alpha):
13188 - When setting the maximum number of connections allowed by the OS,
13189 always allow some extra file descriptors for other files. Fixes
13190 bug 22797; bugfix on 0.2.0.10-alpha.
13192 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.5-alpha):
13193 - Avoid a sandbox failure when trying to re-bind to a socket and
13194 mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha.
13196 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.4-alpha):
13197 - Permit the fchmod system call, to avoid crashing on startup when
13198 starting with the seccomp2 sandbox and an unexpected set of
13199 permissions on the data directory or its contents. Fixes bug
13200 22516; bugfix on 0.2.5.4-alpha.
13202 o Minor bugfixes (relay, backport from 0.3.0.5-rc):
13203 - Avoid a double-marked-circuit warning that could happen when we
13204 receive DESTROY cells under heavy load. Fixes bug 20059; bugfix
13207 o Minor bugfixes (voting consistency, backport from 0.3.1.1-alpha):
13208 - Reject version numbers with non-numeric prefixes (such as +, -, or
13209 whitespace). Disallowing whitespace prevents differential version
13210 parsing between POSIX-based and Windows platforms. Fixes bug 21507
13211 and part of 21508; bugfix on 0.0.8pre1.
13213 o Build features (backport from 0.3.1.5-alpha):
13214 - Tor's repository now includes a Travis Continuous Integration (CI)
13215 configuration file (.travis.yml). This is meant to help new
13216 developers and contributors who fork Tor to a Github repository be
13217 better able to test their changes, and understand what we expect
13218 to pass. To use this new build feature, you must fork Tor to your
13219 Github account, then go into the "Integrations" menu in the
13220 repository settings for your fork and enable Travis, then push
13221 your changes. Closes ticket 22636.
13224 Changes in version 0.3.0.11 - 2017-09-18
13225 Tor 0.3.0.11 backports a collection of bugfixes from Tor the 0.3.1
13228 Most significantly, it includes a fix for TROVE-2017-008, a
13229 security bug that affects hidden services running with the
13230 SafeLogging option disabled. For more information, see
13231 https://trac.torproject.org/projects/tor/ticket/23490
13233 o Minor features (code style, backport from 0.3.1.7):
13234 - Add "Falls through" comments to our codebase, in order to silence
13235 GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas
13236 Stieger. Closes ticket 22446.
13239 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
13242 o Minor bugfixes (compilation, backport from 0.3.1.7):
13243 - Avoid compiler warnings in the unit tests for calling tor_sscanf()
13244 with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha.
13246 o Minor bugfixes (controller, backport from 0.3.1.7):
13247 - Do not crash when receiving a HSPOST command with an empty body.
13248 Fixes part of bug 22644; bugfix on 0.2.7.1-alpha.
13249 - Do not crash when receiving a POSTDESCRIPTOR command with an empty
13250 body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha.
13252 o Minor bugfixes (file limits, osx, backport from 0.3.1.5-alpha):
13253 - When setting the maximum number of connections allowed by the OS,
13254 always allow some extra file descriptors for other files. Fixes
13255 bug 22797; bugfix on 0.2.0.10-alpha.
13257 o Minor bugfixes (logging, relay, backport from 0.3.1.6-rc):
13258 - Remove a forgotten debugging message when an introduction point
13259 successfully establishes a hidden service prop224 circuit with
13261 - Change three other log_warn() for an introduction point to
13262 protocol warnings, because they can be failure from the network
13263 and are not relevant to the operator. Fixes bug 23078; bugfix on
13264 0.3.0.1-alpha and 0.3.0.2-alpha.
13267 Changes in version 0.3.1.7 - 2017-09-18
13268 Tor 0.3.1.7 is the first stable release in the 0.3.1 series.
13270 With the 0.3.1 series, Tor now serves and downloads directory
13271 information in more compact formats, to save on bandwidth overhead. It
13272 also contains a new padding system to resist netflow-based traffic
13273 analysis, and experimental support for building parts of Tor in Rust
13274 (though no parts of Tor are in Rust yet). There are also numerous
13275 small features, bugfixes on earlier release series, and groundwork for
13276 the hidden services revamp of 0.3.2.
13278 This release also includes a fix for TROVE-2017-008, a security bug
13279 that affects hidden services running with the SafeLogging option
13280 disabled. For more information, see
13281 https://trac.torproject.org/projects/tor/ticket/23490
13283 Per our stable release policy, we plan to support each stable release
13284 series for at least the next nine months, or for three months after
13285 the first stable release of the next series: whichever is longer. If
13286 you need a release with long-term support, we recommend that you stay
13287 with the 0.2.9 series.
13289 Below is a list of the changes since 0.3.1.6-rc. For a list of all
13290 changes since 0.3.0, see the ReleaseNotes file.
13292 o Major bugfixes (security, hidden services, loggging):
13293 - Fix a bug where we could log uninitialized stack when a certain
13294 hidden service error occurred while SafeLogging was disabled.
13295 Fixes bug #23490; bugfix on 0.2.7.2-alpha. This is also tracked as
13296 TROVE-2017-008 and CVE-2017-0380.
13298 o Minor features (defensive programming):
13299 - Create a pair of consensus parameters, nf_pad_tor2web and
13300 nf_pad_single_onion, to disable netflow padding in the consensus
13301 for non-anonymous connections in case the overhead is high. Closes
13304 o Minor features (diagnostic):
13305 - Add a stack trace to the bug warnings that can be logged when
13306 trying to send an outgoing relay cell with n_chan == 0. Diagnostic
13307 attempt for bug 23105.
13309 o Minor features (geoip):
13310 - Update geoip and geoip6 to the September 6 2017 Maxmind GeoLite2
13313 o Minor bugfixes (compilation):
13314 - Avoid compiler warnings in the unit tests for calling tor_sscanf()
13315 with wide string outputs. Fixes bug 15582; bugfix on 0.2.6.2-alpha.
13317 o Minor bugfixes (controller):
13318 - Do not crash when receiving a HSPOST command with an empty body.
13319 Fixes part of bug 22644; bugfix on 0.2.7.1-alpha.
13320 - Do not crash when receiving a POSTDESCRIPTOR command with an empty
13321 body. Fixes part of bug 22644; bugfix on 0.2.0.1-alpha.
13323 o Minor bugfixes (relay):
13324 - Inform the geoip and rephist modules about all requests, even on
13325 relays that are only fetching microdescriptors. Fixes a bug
13326 related to 21585; bugfix on 0.3.0.1-alpha.
13328 o Minor bugfixes (unit tests):
13329 - Fix a channelpadding unit test failure on slow systems by using
13330 mocked time instead of actual time. Fixes bug 23077; bugfix
13334 Changes in version 0.3.1.6-rc - 2017-09-05
13335 Tor 0.3.1.6-rc fixes a few small bugs and annoyances in the 0.3.1
13336 release series, including a bug that produced weird behavior on
13337 Windows directory caches.
13339 This is the first release candidate in the Tor 0.3.1 series. If we
13340 find no new bugs or regressions here, the first stable 0.3.1 release
13341 will be nearly identical to it.
13343 o Major bugfixes (windows, directory cache):
13344 - On Windows, do not try to delete cached consensus documents and
13345 diffs before they are unmapped from memory--Windows won't allow
13346 that. Instead, allow the consensus cache directory to grow larger,
13347 to hold files that might need to stay around longer. Fixes bug
13348 22752; bugfix on 0.3.1.1-alpha.
13350 o Minor features (directory authority):
13351 - Improve the message that authorities report to relays that present
13352 RSA/Ed25519 keypairs that conflict with previously pinned keys.
13353 Closes ticket 22348.
13355 o Minor features (geoip):
13356 - Update geoip and geoip6 to the August 3 2017 Maxmind GeoLite2
13359 o Minor features (testing):
13360 - Add more tests for compression backend initialization. Closes
13363 o Minor bugfixes (directory cache):
13364 - Fix a memory leak when recovering space in the consensus cache.
13365 Fixes bug 23139; bugfix on 0.3.1.1-alpha.
13367 o Minor bugfixes (hidden service):
13368 - Increase the number of circuits that a service is allowed to
13369 open over a specific period of time. The value was lower than it
13370 should be (8 vs 12) in the normal case of 3 introduction points.
13371 Fixes bug 22159; bugfix on 0.3.0.5-rc.
13372 - Fix a BUG warning during HSv3 descriptor decoding that could be
13373 cause by a specially crafted descriptor. Fixes bug 23233; bugfix
13374 on 0.3.0.1-alpha. Bug found by "haxxpop".
13375 - Rate-limit the log messages if we exceed the maximum number of
13376 allowed intro circuits. Fixes bug 22159; bugfix on 0.3.1.1-alpha.
13378 o Minor bugfixes (logging, relay):
13379 - Remove a forgotten debugging message when an introduction point
13380 successfully establishes a hidden service prop224 circuit with
13382 - Change three other log_warn() for an introduction point to
13383 protocol warnings, because they can be failure from the network
13384 and are not relevant to the operator. Fixes bug 23078; bugfix on
13385 0.3.0.1-alpha and 0.3.0.2-alpha.
13387 o Minor bugfixes (relay):
13388 - When a relay is not running as a directory cache, it will no
13389 longer generate compressed consensuses and consensus diff
13390 information. Previously, this was a waste of disk and CPU. Fixes
13391 bug 23275; bugfix on 0.3.1.1-alpha.
13393 o Minor bugfixes (robustness, error handling):
13394 - Improve our handling of the cases where OpenSSL encounters a
13395 memory error while encoding keys and certificates. We haven't
13396 observed these errors in the wild, but if they do happen, we now
13397 detect and respond better. Fixes bug 19418; bugfix on all versions
13398 of Tor. Reported by Guido Vranken.
13400 o Minor bugfixes (stability):
13401 - Avoid crashing on a double-free when unable to load or process an
13402 included file. Fixes bug 23155; bugfix on 0.3.1.1-alpha. Found
13403 with the clang static analyzer.
13405 o Minor bugfixes (testing):
13406 - Fix an undersized buffer in test-memwipe.c. Fixes bug 23291;
13407 bugfix on 0.2.7.2-alpha. Found and patched by Ties Stuij.
13408 - Port the hs_ntor handshake test to work correctly with recent
13409 versions of the pysha3 module. Fixes bug 23071; bugfix
13412 o Minor bugfixes (Windows service):
13413 - When running as a Windows service, set the ID of the main thread
13414 correctly. Failure to do so made us fail to send log messages to
13415 the controller in 0.2.1.16-rc, slowed down controller event
13416 delivery in 0.2.7.3-rc and later, and crash with an assertion
13417 failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha.
13418 Patch and diagnosis from "Vort".
13421 Changes in version 0.3.0.10 - 2017-08-02
13422 Tor 0.3.0.10 backports a collection of small-to-medium bugfixes
13423 from the current Tor alpha series. OpenBSD users and TPROXY users
13424 should upgrade; others are probably okay sticking with 0.3.0.9.
13426 o Major features (build system, continuous integration, backport from 0.3.1.5-alpha):
13427 - Tor's repository now includes a Travis Continuous Integration (CI)
13428 configuration file (.travis.yml). This is meant to help new
13429 developers and contributors who fork Tor to a Github repository be
13430 better able to test their changes, and understand what we expect
13431 to pass. To use this new build feature, you must fork Tor to your
13432 Github account, then go into the "Integrations" menu in the
13433 repository settings for your fork and enable Travis, then push
13434 your changes. Closes ticket 22636.
13436 o Major bugfixes (linux TPROXY support, backport from 0.3.1.1-alpha):
13437 - Fix a typo that had prevented TPROXY-based transparent proxying
13438 from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
13439 Patch from "d4fq0fQAgoJ".
13441 o Major bugfixes (openbsd, denial-of-service, backport from 0.3.1.5-alpha):
13442 - Avoid an assertion failure bug affecting our implementation of
13443 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
13444 handling of "0xbar" differs from what we had expected. Fixes bug
13445 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
13447 o Minor features (backport from 0.3.1.5-alpha):
13448 - Update geoip and geoip6 to the July 4 2017 Maxmind GeoLite2
13451 o Minor bugfixes (bandwidth accounting, backport from 0.3.1.2-alpha):
13452 - Roll over monthly accounting at the configured hour and minute,
13453 rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1.
13454 Found by Andrey Karpov with PVS-Studio.
13456 o Minor bugfixes (compilation warnings, backport from 0.3.1.5-alpha):
13457 - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug 22915;
13458 bugfix on 0.2.8.1-alpha.
13459 - Fix warnings when building with libscrypt and openssl scrypt
13460 support on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha.
13461 - When building with certain versions of the mingw C header files,
13462 avoid float-conversion warnings when calling the C functions
13463 isfinite(), isnan(), and signbit(). Fixes bug 22801; bugfix
13466 o Minor bugfixes (compilation, mingw, backport from 0.3.1.1-alpha):
13467 - Backport a fix for an "unused variable" warning that appeared
13468 in some versions of mingw. Fixes bug 22838; bugfix on
13471 o Minor bugfixes (coverity build support, backport from 0.3.1.5-alpha):
13472 - Avoid Coverity build warnings related to our BUG() macro. By
13473 default, Coverity treats BUG() as the Linux kernel does: an
13474 instant abort(). We need to override that so our BUG() macro
13475 doesn't prevent Coverity from analyzing functions that use it.
13476 Fixes bug 23030; bugfix on 0.2.9.1-alpha.
13478 o Minor bugfixes (directory authority, backport from 0.3.1.1-alpha):
13479 - When rejecting a router descriptor for running an obsolete version
13480 of Tor without ntor support, warn about the obsolete tor version,
13481 not the missing ntor key. Fixes bug 20270; bugfix on 0.2.9.3-alpha.
13483 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.5-alpha):
13484 - Avoid a sandbox failure when trying to re-bind to a socket and
13485 mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha.
13487 o Minor bugfixes (unit tests, backport from 0.3.1.5-alpha)
13488 - Fix a memory leak in the link-handshake/certs_ok_ed25519 test.
13489 Fixes bug 22803; bugfix on 0.3.0.1-alpha.
13492 Changes in version 0.3.1.5-alpha - 2017-08-01
13493 Tor 0.3.1.5-alpha improves the performance of consensus diff
13494 calculation, fixes a crash bug on older versions of OpenBSD, and fixes
13495 several other bugs. If no serious bugs are found in this version, the
13496 next version will be a release candidate.
13498 This release also marks the end of support for the Tor 0.2.4.x,
13499 0.2.6.x, and 0.2.7.x release series. Those releases will receive no
13500 further bug or security fixes. Anyone still running or distributing
13501 one of those versions should upgrade.
13503 o Major features (build system, continuous integration):
13504 - Tor's repository now includes a Travis Continuous Integration (CI)
13505 configuration file (.travis.yml). This is meant to help new
13506 developers and contributors who fork Tor to a Github repository be
13507 better able to test their changes, and understand what we expect
13508 to pass. To use this new build feature, you must fork Tor to your
13509 Github account, then go into the "Integrations" menu in the
13510 repository settings for your fork and enable Travis, then push
13511 your changes. Closes ticket 22636.
13513 o Major bugfixes (openbsd, denial-of-service):
13514 - Avoid an assertion failure bug affecting our implementation of
13515 inet_pton(AF_INET6) on certain OpenBSD systems whose strtol()
13516 handling of "0xbar" differs from what we had expected. Fixes bug
13517 22789; bugfix on 0.2.3.8-alpha. Also tracked as TROVE-2017-007.
13519 o Major bugfixes (relay, performance):
13520 - Perform circuit handshake operations at a higher priority than we
13521 use for consensus diff creation and compression. This should
13522 prevent circuits from starving when a relay or bridge receives a
13523 new consensus, especially on lower-powered machines. Fixes bug
13524 22883; bugfix on 0.3.1.1-alpha.
13526 o Minor features (bridge authority):
13527 - Add "fingerprint" lines to the networkstatus-bridges file produced
13528 by bridge authorities. Closes ticket 22207.
13530 o Minor features (directory cache, consensus diff):
13531 - Add a new MaxConsensusAgeForDiffs option to allow directory cache
13532 operators with low-resource environments to adjust the number of
13533 consensuses they'll store and generate diffs from. Most cache
13534 operators should leave it unchanged. Helps to work around
13537 o Minor features (geoip):
13538 - Update geoip and geoip6 to the July 4 2017 Maxmind GeoLite2
13541 o Minor features (relay, performance):
13542 - Always start relays with at least two worker threads, to prevent
13543 priority inversion on slow tasks. Part of the fix for bug 22883.
13544 - Allow background work to be queued with different priorities, so
13545 that a big pile of slow low-priority jobs will not starve out
13546 higher priority jobs. This lays the groundwork for a fix for
13549 o Minor bugfixes (build system, rust):
13550 - Fix a problem where Rust toolchains were not being found when
13551 building without --enable-cargo-online-mode, due to setting the
13552 $HOME environment variable instead of $CARGO_HOME. Fixes bug
13553 22830; bugfix on 0.3.1.1-alpha. Fix by Chelsea Komlo.
13555 o Minor bugfixes (compatibility, zstd):
13556 - Write zstd epilogues correctly when the epilogue requires
13557 reallocation of the output buffer, even with zstd 1.3.0.
13558 (Previously, we worked on 1.2.0 and failed with 1.3.0). Fixes bug
13559 22927; bugfix on 0.3.1.1-alpha.
13561 o Minor bugfixes (compilation warnings):
13562 - Suppress -Wdouble-promotion warnings with clang 4.0. Fixes bug
13563 22915; bugfix on 0.2.8.1-alpha.
13564 - Fix warnings when building with libscrypt and openssl scrypt
13565 support on Clang. Fixes bug 22916; bugfix on 0.2.7.2-alpha.
13566 - Compile correctly when both openssl 1.1.0 and libscrypt are
13567 detected. Previously this would cause an error. Fixes bug 22892;
13568 bugfix on 0.3.1.1-alpha.
13569 - When building with certain versions of the mingw C header files,
13570 avoid float-conversion warnings when calling the C functions
13571 isfinite(), isnan(), and signbit(). Fixes bug 22801; bugfix
13574 o Minor bugfixes (coverity build support):
13575 - Avoid Coverity build warnings related to our BUG() macro. By
13576 default, Coverity treats BUG() as the Linux kernel does: an
13577 instant abort(). We need to override that so our BUG() macro
13578 doesn't prevent Coverity from analyzing functions that use it.
13579 Fixes bug 23030; bugfix on 0.2.9.1-alpha.
13581 o Minor bugfixes (directory authority):
13582 - When a directory authority rejects a descriptor or extrainfo with
13583 a given digest, mark that digest as undownloadable, so that we do
13584 not attempt to download it again over and over. We previously
13585 tried to avoid downloading such descriptors by other means, but we
13586 didn't notice if we accidentally downloaded one anyway. This
13587 behavior became problematic in 0.2.7.2-alpha, when authorities
13588 began pinning Ed25519 keys. Fixes bug 22349; bugfix
13591 o Minor bugfixes (error reporting, windows):
13592 - When formatting Windows error messages, use the English format to
13593 avoid codepage issues. Fixes bug 22520; bugfix on 0.1.2.8-alpha.
13596 o Minor bugfixes (file limits, osx):
13597 - When setting the maximum number of connections allowed by the OS,
13598 always allow some extra file descriptors for other files. Fixes
13599 bug 22797; bugfix on 0.2.0.10-alpha.
13601 o Minor bugfixes (linux seccomp2 sandbox):
13602 - Avoid a sandbox failure when trying to re-bind to a socket and
13603 mark it as IPv6-only. Fixes bug 20247; bugfix on 0.2.5.1-alpha.
13605 o Minor bugfixes (memory leaks):
13606 - Fix a small memory leak when validating a configuration that uses
13607 two or more AF_UNIX sockets for the same port type. Fixes bug
13608 23053; bugfix on 0.2.6.3-alpha. This is CID 1415725.
13610 o Minor bugfixes (unit tests):
13611 - test_consdiff_base64cmp would fail on OS X because while OS X
13612 follows the standard of (less than zero/zero/greater than zero),
13613 it doesn't follow the convention of (-1/0/+1). Make the test
13614 comply with the standard. Fixes bug 22870; bugfix on 0.3.1.1-alpha.
13615 - Fix a memory leak in the link-handshake/certs_ok_ed25519 test.
13616 Fixes bug 22803; bugfix on 0.3.0.1-alpha.
13619 Changes in version 0.3.1.4-alpha - 2017-06-29
13620 Tor 0.3.1.4-alpha fixes a path selection bug that would allow a client
13621 to use a guard that was in the same network family as a chosen exit
13622 relay. This is a security regression; all clients running earlier
13623 versions of 0.3.0.x or 0.3.1.x should upgrade to 0.3.0.9
13626 This release also fixes several other bugs introduced in 0.3.0.x
13627 and 0.3.1.x, including others that can affect bandwidth usage
13630 o New dependencies:
13631 - To build with zstd and lzma support, Tor now requires the
13632 pkg-config tool at build time. (This requirement was new in
13633 0.3.1.1-alpha, but was not noted at the time. Noting it here to
13634 close ticket 22623.)
13636 o Major bugfixes (path selection, security):
13637 - When choosing which guard to use for a circuit, avoid the exit's
13638 family along with the exit itself. Previously, the new guard
13639 selection logic avoided the exit, but did not consider its family.
13640 Fixes bug 22753; bugfix on 0.3.0.1-alpha. Tracked as TROVE-2017-
13641 006 and CVE-2017-0377.
13643 o Major bugfixes (compression, zstd):
13644 - Correctly detect a full buffer when decompressing a large zstd-
13645 compressed input. Previously, we would sometimes treat a full
13646 buffer as an error. Fixes bug 22628; bugfix on 0.3.1.1-alpha.
13648 o Major bugfixes (directory protocol):
13649 - Ensure that we send "304 Not modified" as HTTP status code when a
13650 client is attempting to fetch a consensus or consensus diff, and
13651 the best one we can send them is one they already have. Fixes bug
13652 22702; bugfix on 0.3.1.1-alpha.
13654 o Major bugfixes (entry guards):
13655 - When starting with an old consensus, do not add new entry guards
13656 unless the consensus is "reasonably live" (under 1 day old). Fixes
13657 one root cause of bug 22400; bugfix on 0.3.0.1-alpha.
13659 o Minor features (bug mitigation, diagnostics, logging):
13660 - Avoid an assertion failure, and log a better error message, when
13661 unable to remove a file from the consensus cache on Windows.
13662 Attempts to mitigate and diagnose bug 22752.
13664 o Minor features (geoip):
13665 - Update geoip and geoip6 to the June 8 2017 Maxmind GeoLite2
13668 o Minor bugfixes (compression):
13669 - When compressing or decompressing a buffer, check for a failure to
13670 create a compression object. Fixes bug 22626; bugfix
13672 - When decompressing a buffer, check for extra data after the end of
13673 the compressed data. Fixes bug 22629; bugfix on 0.3.1.1-alpha.
13674 - When decompressing an object received over an anonymous directory
13675 connection, if we have already decompressed it using an acceptable
13676 compression method, do not reject it for looking like an
13677 unacceptable compression method. Fixes part of bug 22670; bugfix
13679 - When serving directory votes compressed with zlib, do not claim to
13680 have compressed them with zstd. Fixes bug 22669; bugfix
13682 - When spooling compressed data to an output buffer, don't try to
13683 spool more data when there is no more data to spool and we are not
13684 trying to flush the input. Previously, we would sometimes launch
13685 compression requests with nothing to do, which interferes with our
13686 22672 checks. Fixes bug 22719; bugfix on 0.2.0.16-alpha.
13688 o Minor bugfixes (defensive programming):
13689 - Detect and break out of infinite loops in our compression code. We
13690 don't think that any such loops exist now, but it's best to be
13691 safe. Closes ticket 22672.
13692 - Fix a memset() off the end of an array when packing cells. This
13693 bug should be harmless in practice, since the corrupted bytes are
13694 still in the same structure, and are always padding bytes,
13695 ignored, or immediately overwritten, depending on compiler
13696 behavior. Nevertheless, because the memset()'s purpose is to make
13697 sure that any other cell-handling bugs can't expose bytes to the
13698 network, we need to fix it. Fixes bug 22737; bugfix on
13699 0.2.4.11-alpha. Fixes CID 1401591.
13701 o Minor bugfixes (linux seccomp2 sandbox):
13702 - Permit the fchmod system call, to avoid crashing on startup when
13703 starting with the seccomp2 sandbox and an unexpected set of
13704 permissions on the data directory or its contents. Fixes bug
13705 22516; bugfix on 0.2.5.4-alpha.
13706 - Fix a crash in the LZMA module, when the sandbox was enabled, and
13707 liblzma would allocate more than 16 MB of memory. We solve this by
13708 bumping the mprotect() limit in the sandbox module from 16 MB to
13709 20 MB. Fixes bug 22751; bugfix on 0.3.1.1-alpha.
13711 o Minor bugfixes (logging):
13712 - When decompressing, do not warn if we fail to decompress using a
13713 compression method that we merely guessed. Fixes part of bug
13714 22670; bugfix on 0.1.1.14-alpha.
13715 - When decompressing, treat mismatch between content-encoding and
13716 actual compression type as a protocol warning. Fixes part of bug
13717 22670; bugfix on 0.1.1.9-alpha.
13718 - Downgrade "assigned_to_cpuworker failed" message to info-level
13719 severity. In every case that can reach it, either a better warning
13720 has already been logged, or no warning is warranted. Fixes bug
13721 22356; bugfix on 0.2.6.3-alpha.
13722 - Demote a warn that was caused by libevent delays to info if
13723 netflow padding is less than 4.5 seconds late, or to notice
13724 if it is more (4.5 seconds is the amount of time that a netflow
13725 record might be emitted after, if we chose the maximum timeout).
13726 Fixes bug 22212; bugfix on 0.3.1.1-alpha.
13728 o Minor bugfixes (process behavior):
13729 - When exiting because of an error, always exit with a nonzero exit
13730 status. Previously, we would fail to report an error in our exit
13731 status in cases related to __OwningControllerProcess failure,
13732 lockfile contention, and Ed25519 key initialization. Fixes bug
13733 22720; bugfix on versions 0.2.1.6-alpha, 0.2.2.28-beta, and
13734 0.2.7.2-alpha respectively. Reported by "f55jwk4f"; patch
13738 - Add a manpage description for the key-pinning-journal file. Closes
13740 - Correctly note that bandwidth accounting values are stored in the
13741 state file, and the bw_accounting file is now obsolete. Closes
13743 - Document more of the files in the Tor data directory, including
13744 cached-extrainfo, secret_onion_key{,_ntor}.old, hidserv-stats,
13745 approved-routers, sr-random, and diff-cache. Found while fixing
13749 Changes in version 0.3.0.9 - 2017-06-29
13750 Tor 0.3.0.9 fixes a path selection bug that would allow a client
13751 to use a guard that was in the same network family as a chosen exit
13752 relay. This is a security regression; all clients running earlier
13753 versions of 0.3.0.x or 0.3.1.x should upgrade to 0.3.0.9 or
13756 This release also backports several other bugfixes from the 0.3.1.x
13759 o Major bugfixes (path selection, security, backport from 0.3.1.4-alpha):
13760 - When choosing which guard to use for a circuit, avoid the exit's
13761 family along with the exit itself. Previously, the new guard
13762 selection logic avoided the exit, but did not consider its family.
13763 Fixes bug 22753; bugfix on 0.3.0.1-alpha. Tracked as TROVE-2017-
13764 006 and CVE-2017-0377.
13766 o Major bugfixes (entry guards, backport from 0.3.1.1-alpha):
13767 - Don't block bootstrapping when a primary bridge is offline and we
13768 can't get its descriptor. Fixes bug 22325; fixes one case of bug
13769 21969; bugfix on 0.3.0.3-alpha.
13771 o Major bugfixes (entry guards, backport from 0.3.1.4-alpha):
13772 - When starting with an old consensus, do not add new entry guards
13773 unless the consensus is "reasonably live" (under 1 day old). Fixes
13774 one root cause of bug 22400; bugfix on 0.3.0.1-alpha.
13776 o Minor features (geoip):
13777 - Update geoip and geoip6 to the June 8 2017 Maxmind GeoLite2
13780 o Minor bugfixes (voting consistency, backport from 0.3.1.1-alpha):
13781 - Reject version numbers with non-numeric prefixes (such as +, -, or
13782 whitespace). Disallowing whitespace prevents differential version
13783 parsing between POSIX-based and Windows platforms. Fixes bug 21507
13784 and part of 21508; bugfix on 0.0.8pre1.
13786 o Minor bugfixes (linux seccomp2 sandbox, backport from 0.3.1.4-alpha):
13787 - Permit the fchmod system call, to avoid crashing on startup when
13788 starting with the seccomp2 sandbox and an unexpected set of
13789 permissions on the data directory or its contents. Fixes bug
13790 22516; bugfix on 0.2.5.4-alpha.
13792 o Minor bugfixes (defensive programming, backport from 0.3.1.4-alpha):
13793 - Fix a memset() off the end of an array when packing cells. This
13794 bug should be harmless in practice, since the corrupted bytes are
13795 still in the same structure, and are always padding bytes,
13796 ignored, or immediately overwritten, depending on compiler
13797 behavior. Nevertheless, because the memset()'s purpose is to make
13798 sure that any other cell-handling bugs can't expose bytes to the
13799 network, we need to fix it. Fixes bug 22737; bugfix on
13800 0.2.4.11-alpha. Fixes CID 1401591.
13803 Changes in version 0.3.1.3-alpha - 2017-06-08
13804 Tor 0.3.1.3-alpha fixes a pair of bugs that would allow an attacker to
13805 remotely crash a hidden service with an assertion failure. Anyone
13806 running a hidden service should upgrade to this version, or to some
13807 other version with fixes for TROVE-2017-004 and TROVE-2017-005.
13809 Tor 0.3.1.3-alpha also includes fixes for several key management bugs
13810 that sometimes made relays unreliable, as well as several other
13811 bugfixes described below.
13813 o Major bugfixes (hidden service, relay, security):
13814 - Fix a remotely triggerable assertion failure when a hidden service
13815 handles a malformed BEGIN cell. Fixes bug 22493, tracked as
13816 TROVE-2017-004 and as CVE-2017-0375; bugfix on 0.3.0.1-alpha.
13817 - Fix a remotely triggerable assertion failure caused by receiving a
13818 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
13819 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
13822 o Major bugfixes (relay, link handshake):
13823 - When performing the v3 link handshake on a TLS connection, report
13824 that we have the x509 certificate that we actually used on that
13825 connection, even if we have changed certificates since that
13826 connection was first opened. Previously, we would claim to have
13827 used our most recent x509 link certificate, which would sometimes
13828 make the link handshake fail. Fixes one case of bug 22460; bugfix
13831 o Major bugfixes (relays, key management):
13832 - Regenerate link and authentication certificates whenever the key
13833 that signs them changes; also, regenerate link certificates
13834 whenever the signed key changes. Previously, these processes were
13835 only weakly coupled, and we relays could (for minutes to hours)
13836 wind up with an inconsistent set of keys and certificates, which
13837 other relays would not accept. Fixes two cases of bug 22460;
13838 bugfix on 0.3.0.1-alpha.
13839 - When sending an Ed25519 signing->link certificate in a CERTS cell,
13840 send the certificate that matches the x509 certificate that we
13841 used on the TLS connection. Previously, there was a race condition
13842 if the TLS context rotated after we began the TLS handshake but
13843 before we sent the CERTS cell. Fixes a case of bug 22460; bugfix
13846 o Major bugfixes (torrc, crash):
13847 - Fix a crash bug when using %include in torrc. Fixes bug 22417;
13848 bugfix on 0.3.1.1-alpha. Patch by Daniel Pinto.
13850 o Minor features (code style):
13851 - Add "Falls through" comments to our codebase, in order to silence
13852 GCC 7's -Wimplicit-fallthrough warnings. Patch from Andreas
13853 Stieger. Closes ticket 22446.
13855 o Minor features (diagnostic):
13856 - Add logging messages to try to diagnose a rare bug that seems to
13857 generate RSA->Ed25519 cross-certificates dated in the 1970s. We
13858 think this is happening because of incorrect system clocks, but
13859 we'd like to know for certain. Diagnostic for bug 22466.
13861 o Minor bugfixes (correctness):
13862 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
13863 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
13865 o Minor bugfixes (directory protocol):
13866 - Check for libzstd >= 1.1, because older versions lack the
13867 necessary streaming API. Fixes bug 22413; bugfix on 0.3.1.1-alpha.
13869 o Minor bugfixes (link handshake):
13870 - Lower the lifetime of the RSA->Ed25519 cross-certificate to six
13871 months, and regenerate it when it is within one month of expiring.
13872 Previously, we had generated this certificate at startup with a
13873 ten-year lifetime, but that could lead to weird behavior when Tor
13874 was started with a grossly inaccurate clock. Mitigates bug 22466;
13875 mitigation on 0.3.0.1-alpha.
13877 o Minor bugfixes (storage directories):
13878 - Always check for underflows in the cached storage directory usage.
13879 If the usage does underflow, re-calculate it. Also, avoid a
13880 separate underflow when the usage is not known. Fixes bug 22424;
13881 bugfix on 0.3.1.1-alpha.
13883 o Minor bugfixes (unit tests):
13884 - The unit tests now pass on systems where localhost is misconfigured
13885 to some IPv4 address other than 127.0.0.1. Fixes bug 6298; bugfix
13889 - Clarify the manpage for the (deprecated) torify script. Closes
13892 Changes in version 0.3.0.8 - 2017-06-08
13893 Tor 0.3.0.8 fixes a pair of bugs that would allow an attacker to
13894 remotely crash a hidden service with an assertion failure. Anyone
13895 running a hidden service should upgrade to this version, or to some
13896 other version with fixes for TROVE-2017-004 and TROVE-2017-005.
13898 Tor 0.3.0.8 also includes fixes for several key management bugs
13899 that sometimes made relays unreliable, as well as several other
13900 bugfixes described below.
13902 o Major bugfixes (hidden service, relay, security, backport
13903 from 0.3.1.3-alpha):
13904 - Fix a remotely triggerable assertion failure when a hidden service
13905 handles a malformed BEGIN cell. Fixes bug 22493, tracked as
13906 TROVE-2017-004 and as CVE-2017-0375; bugfix on 0.3.0.1-alpha.
13907 - Fix a remotely triggerable assertion failure caused by receiving a
13908 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
13909 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
13912 o Major bugfixes (relay, link handshake, backport from 0.3.1.3-alpha):
13913 - When performing the v3 link handshake on a TLS connection, report
13914 that we have the x509 certificate that we actually used on that
13915 connection, even if we have changed certificates since that
13916 connection was first opened. Previously, we would claim to have
13917 used our most recent x509 link certificate, which would sometimes
13918 make the link handshake fail. Fixes one case of bug 22460; bugfix
13921 o Major bugfixes (relays, key management, backport from 0.3.1.3-alpha):
13922 - Regenerate link and authentication certificates whenever the key
13923 that signs them changes; also, regenerate link certificates
13924 whenever the signed key changes. Previously, these processes were
13925 only weakly coupled, and we relays could (for minutes to hours)
13926 wind up with an inconsistent set of keys and certificates, which
13927 other relays would not accept. Fixes two cases of bug 22460;
13928 bugfix on 0.3.0.1-alpha.
13929 - When sending an Ed25519 signing->link certificate in a CERTS cell,
13930 send the certificate that matches the x509 certificate that we
13931 used on the TLS connection. Previously, there was a race condition
13932 if the TLS context rotated after we began the TLS handshake but
13933 before we sent the CERTS cell. Fixes a case of bug 22460; bugfix
13936 o Major bugfixes (hidden service v3, backport from 0.3.1.1-alpha):
13937 - Stop rejecting v3 hidden service descriptors because their size
13938 did not match an old padding rule. Fixes bug 22447; bugfix on
13941 o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
13942 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
13943 December 2016 (of which ~126 were still functional) with a list of
13944 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
13945 2017. Resolves ticket 21564.
13947 o Minor bugfixes (configuration, backport from 0.3.1.1-alpha):
13948 - Do not crash when starting with LearnCircuitBuildTimeout 0. Fixes
13949 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.
13955 o Minor bugfixes (link handshake, backport from 0.3.1.3-alpha):
13956 - Lower the lifetime of the RSA->Ed25519 cross-certificate to six
13957 months, and regenerate it when it is within one month of expiring.
13958 Previously, we had generated this certificate at startup with a
13959 ten-year lifetime, but that could lead to weird behavior when Tor
13960 was started with a grossly inaccurate clock. Mitigates bug 22466;
13961 mitigation on 0.3.0.1-alpha.
13963 o Minor bugfixes (memory leak, directory authority, backport from
13965 - When directory authorities reject a router descriptor due to
13966 keypinning, free the router descriptor rather than leaking the
13967 memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
13970 Changes in version 0.2.9.11 - 2017-06-08
13971 Tor 0.2.9.11 backports a fix for a bug that would allow an attacker to
13972 remotely crash a hidden service with an assertion failure. Anyone
13973 running a hidden service should upgrade to this version, or to some
13974 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
13975 are not affected by TROVE-2017-004.)
13977 Tor 0.2.9.11 also backports fixes for several key management bugs
13978 that sometimes made relays unreliable, as well as several other
13979 bugfixes described below.
13981 o Major bugfixes (hidden service, relay, security, backport
13982 from 0.3.1.3-alpha):
13983 - Fix a remotely triggerable assertion failure caused by receiving a
13984 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
13985 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
13988 o Major bugfixes (relay, link handshake, backport from 0.3.1.3-alpha):
13989 - When performing the v3 link handshake on a TLS connection, report
13990 that we have the x509 certificate that we actually used on that
13991 connection, even if we have changed certificates since that
13992 connection was first opened. Previously, we would claim to have
13993 used our most recent x509 link certificate, which would sometimes
13994 make the link handshake fail. Fixes one case of bug 22460; bugfix
13997 o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
13998 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
13999 December 2016 (of which ~126 were still functional) with a list of
14000 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
14001 2017. Resolves ticket 21564.
14003 o Minor features (future-proofing, backport from 0.3.0.7):
14004 - Tor no longer refuses to download microdescriptors or descriptors if
14005 they are listed as "published in the future". This change will
14006 eventually allow us to stop listing meaningful "published" dates
14007 in microdescriptor consensuses, and thereby allow us to reduce the
14008 resources required to download consensus diffs by over 50%.
14009 Implements part of ticket 21642; implements part of proposal 275.
14011 o Minor features (directory authorities, backport from 0.3.0.4-rc)
14012 - Directory authorities now reject relays running versions
14013 0.2.9.1-alpha through 0.2.9.4-alpha, because those relays
14014 suffer from bug 20499 and don't keep their consensus cache
14015 up-to-date. Resolves ticket 20509.
14017 o Minor features (geoip):
14018 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
14021 o Minor bugfixes (control port, backport from 0.3.0.6):
14022 - The GETINFO extra-info/digest/<digest> command was broken because
14023 of a wrong base16 decode return value check, introduced when
14024 refactoring that API. Fixes bug 22034; bugfix on 0.2.9.1-alpha.
14026 o Minor bugfixes (correctness, backport from 0.3.1.3-alpha):
14027 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
14028 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
14030 o Minor bugfixes (Linux seccomp2 sandbox, backport from 0.3.0.7):
14031 - The getpid() system call is now permitted under the Linux seccomp2
14032 sandbox, to avoid crashing with versions of OpenSSL (and other
14033 libraries) that attempt to learn the process's PID by using the
14034 syscall rather than the VDSO code. Fixes bug 21943; bugfix
14037 o Minor bugfixes (memory leak, directory authority, backport
14038 from 0.3.1.2-alpha):
14039 - When directory authorities reject a router descriptor due to
14040 keypinning, free the router descriptor rather than leaking the
14041 memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
14043 Changes in version 0.2.8.14 - 2017-06-08
14044 Tor 0.2.7.8 backports a fix for a bug that would allow an attacker to
14045 remotely crash a hidden service with an assertion failure. Anyone
14046 running a hidden service should upgrade to this version, or to some
14047 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
14048 are not affected by TROVE-2017-004.)
14050 o Major bugfixes (hidden service, relay, security):
14051 - Fix a remotely triggerable assertion failure caused by receiving a
14052 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
14053 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
14056 o Minor features (geoip):
14057 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
14060 o Minor features (fallback directory list, backport from 0.3.1.3-alpha):
14061 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
14062 December 2016 (of which ~126 were still functional) with a list of
14063 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
14064 2017. Resolves ticket 21564.
14066 o Minor bugfixes (correctness):
14067 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
14068 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
14070 Changes in version 0.2.7.8 - 2017-06-08
14071 Tor 0.2.7.8 backports a fix for a bug that would allow an attacker to
14072 remotely crash a hidden service with an assertion failure. Anyone
14073 running a hidden service should upgrade to this version, or to some
14074 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
14075 are not affected by TROVE-2017-004.)
14077 o Major bugfixes (hidden service, relay, security):
14078 - Fix a remotely triggerable assertion failure caused by receiving a
14079 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
14080 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
14083 o Minor features (geoip):
14084 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
14087 o Minor bugfixes (correctness):
14088 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
14089 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
14092 Changes in version 0.2.6.12 - 2017-06-08
14093 Tor 0.2.6.12 backports a fix for a bug that would allow an attacker to
14094 remotely crash a hidden service with an assertion failure. Anyone
14095 running a hidden service should upgrade to this version, or to some
14096 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
14097 are not affected by TROVE-2017-004.)
14099 o Major bugfixes (hidden service, relay, security):
14100 - Fix a remotely triggerable assertion failure caused by receiving a
14101 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
14102 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
14105 o Minor features (geoip):
14106 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
14109 o Minor bugfixes (correctness):
14110 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
14111 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
14113 Changes in version 0.2.5.14 - 2017-06-08
14114 Tor 0.2.5.14 backports a fix for a bug that would allow an attacker to
14115 remotely crash a hidden service with an assertion failure. Anyone
14116 running a hidden service should upgrade to this version, or to some
14117 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
14118 are not affected by TROVE-2017-004.)
14120 o Major bugfixes (hidden service, relay, security):
14121 - Fix a remotely triggerable assertion failure caused by receiving a
14122 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
14123 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
14126 o Minor features (geoip):
14127 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
14130 o Minor bugfixes (correctness):
14131 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
14132 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
14134 Changes in version 0.2.4.29 - 2017-06-08
14135 Tor 0.2.4.29 backports a fix for a bug that would allow an attacker to
14136 remotely crash a hidden service with an assertion failure. Anyone
14137 running a hidden service should upgrade to this version, or to some
14138 other version with fixes for TROVE-2017-005. (Versions before 0.3.0
14139 are not affected by TROVE-2017-004.)
14141 o Major bugfixes (hidden service, relay, security):
14142 - Fix a remotely triggerable assertion failure caused by receiving a
14143 BEGIN_DIR cell on a hidden service rendezvous circuit. Fixes bug
14144 22494, tracked as TROVE-2017-005 and CVE-2017-0376; bugfix
14147 o Minor features (geoip):
14148 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
14151 o Minor bugfixes (correctness):
14152 - Avoid undefined behavior when parsing IPv6 entries from the geoip6
14153 file. Fixes bug 22490; bugfix on 0.2.4.6-alpha.
14156 Changes in version 0.3.1.2-alpha - 2017-05-26
14157 Tor 0.3.1.2-alpha is the second release in the 0.3.1.x series. It
14158 fixes a few bugs found while testing 0.3.1.1-alpha, including a
14159 memory corruption bug that affected relay stability.
14161 o Major bugfixes (crash, relay):
14162 - Fix a memory-corruption bug in relays that set MyFamily.
14163 Previously, they would double-free MyFamily elements when making
14164 the next descriptor or when changing their configuration. Fixes
14165 bug 22368; bugfix on 0.3.1.1-alpha.
14167 o Minor bugfixes (logging):
14168 - Log a better message when a directory authority replies to an
14169 upload with an unexpected status code. Fixes bug 11121; bugfix
14172 o Minor bugfixes (memory leak, directory authority):
14173 - When directory authorities reject a router descriptor due to
14174 keypinning, free the router descriptor rather than leaking the
14175 memory. Fixes bug 22370; bugfix on 0.2.7.2-alpha.
14178 Changes in version 0.3.1.1-alpha - 2017-05-22
14179 Tor 0.3.1.1-alpha is the first release in the 0.3.1.x series. It
14180 reduces the bandwidth usage for Tor's directory protocol, adds some
14181 basic padding to resist netflow-based traffic analysis and to serve as
14182 the basis of other padding in the future, and adds rust support to the
14185 It also contains numerous other small features and improvements to
14186 security, correctness, and performance.
14188 Below are the changes since 0.3.0.7.
14190 o Major features (directory protocol):
14191 - Tor relays and authorities can now serve clients an abbreviated
14192 version of the consensus document, containing only the changes
14193 since an older consensus document that the client holds. Clients
14194 now request these documents when available. When both client and
14195 server use this new protocol, they will use far less bandwidth (up
14196 to 94% less) to keep the client's consensus up-to-date. Implements
14197 proposal 140; closes ticket 13339. Based on work by Daniel Martí.
14198 - Tor can now compress directory traffic with lzma or with zstd
14199 compression algorithms, which can deliver better bandwidth
14200 performance. Because lzma is computationally expensive, it's only
14201 used for documents that can be compressed once and served many
14202 times. Support for these algorithms requires that tor is built
14203 with the libzstd and/or liblzma libraries available. Implements
14204 proposal 278; closes ticket 21662.
14205 - Relays now perform the more expensive compression operations, and
14206 consensus diff generation, in worker threads. This separation
14207 avoids delaying the main thread when a new consensus arrives.
14209 o Major features (experimental):
14210 - Tor can now build modules written in Rust. To turn this on, pass
14211 the "--enable-rust" flag to the configure script. It's not time to
14212 get excited yet: currently, there is no actual Rust functionality
14213 beyond some simple glue code, and a notice at startup to tell you
14214 that Rust is running. Still, we hope that programmers and
14215 packagers will try building Tor with Rust support, so that we can
14216 find issues and solve portability problems. Closes ticket 22106.
14218 o Major features (traffic analysis resistance):
14219 - Connections between clients and relays now send a padding cell in
14220 each direction every 1.5 to 9.5 seconds (tunable via consensus
14221 parameters). This padding will not resist specialized
14222 eavesdroppers, but it should be enough to make many ISPs' routine
14223 network flow logging less useful in traffic analysis against
14226 Padding is negotiated using Tor's link protocol, so both relays
14227 and clients must upgrade for this to take effect. Clients may
14228 still send padding despite the relay's version by setting
14229 ConnectionPadding 1 in torrc, and may disable padding by setting
14230 ConnectionPadding 0 in torrc. Padding may be minimized for mobile
14231 users with the torrc option ReducedConnectionPadding. Implements
14232 Proposal 251 and Section 2 of Proposal 254; closes ticket 16861.
14233 - Relays will publish 24 hour totals of padding and non-padding cell
14234 counts to their extra-info descriptors, unless PaddingStatistics 0
14235 is set in torrc. These 24 hour totals are also rounded to
14236 multiples of 10000.
14238 o Major bugfixes (connection usage):
14239 - We use NETINFO cells to try to determine if both relays involved
14240 in a connection will agree on the canonical status of that
14241 connection. We prefer the connections where this is the case for
14242 extend cells, and try to close connections where relays disagree
14243 on their canonical status early. Also, we now prefer the oldest
14244 valid connection for extend cells. These two changes should reduce
14245 the number of long-term connections that are kept open between
14246 relays. Fixes bug 17604; bugfix on 0.2.5.5-alpha.
14247 - Relays now log hourly statistics (look for
14248 "channel_check_for_duplicates" lines) on the total number of
14249 connections to other relays. If the number of connections per
14250 relay is unexpectedly large, this log message is at notice level.
14251 Otherwise it is at info.
14253 o Major bugfixes (entry guards):
14254 - Don't block bootstrapping when a primary bridge is offline and we
14255 can't get its descriptor. Fixes bug 22325; fixes one case of bug
14256 21969; bugfix on 0.3.0.3-alpha.
14258 o Major bugfixes (linux TPROXY support):
14259 - Fix a typo that had prevented TPROXY-based transparent proxying
14260 from working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
14261 Patch from "d4fq0fQAgoJ".
14263 o Minor features (security, windows):
14264 - Enable a couple of pieces of Windows hardening: one
14265 (HeapEnableTerminationOnCorruption) that has been on-by-default
14266 since Windows 8, and unavailable before Windows 7; and one
14267 (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't
14268 affect us, but shouldn't do any harm. Closes ticket 21953.
14270 o Minor features (config options):
14271 - Allow "%include" directives in torrc configuration files. These
14272 directives import the settings from other files, or from all the
14273 files in a directory. Closes ticket 1922. Code by Daniel Pinto.
14274 - Make SAVECONF return an error when overwriting a torrc that has
14275 includes. Using SAVECONF with the FORCE option will allow it to
14276 overwrite torrc even if includes are used. Related to ticket 1922.
14277 - Add "GETINFO config-can-saveconf" to tell controllers if SAVECONF
14278 will work without the FORCE option. Related to ticket 1922.
14280 o Minor features (controller):
14281 - Warn the first time that a controller requests data in the long-
14282 deprecated 'GETINFO network-status' format. Closes ticket 21703.
14284 o Minor features (defaults):
14285 - The default value for UseCreateFast is now 0: clients which
14286 haven't yet received a consensus document will now use a proper
14287 ntor handshake to talk to their directory servers whenever they
14288 can. Closes ticket 21407.
14289 - Onion key rotation and expiry intervals are now defined as a
14290 network consensus parameter, per proposal 274. The default
14291 lifetime of an onion key is increased from 7 to 28 days. Old onion
14292 keys will expire after 7 days by default. This change will make
14293 consensus diffs much smaller, and save significant bandwidth.
14294 Closes ticket 21641.
14296 o Minor features (fallback directory list):
14297 - Update the fallback directory mirror whitelist and blacklist based
14298 on operator emails. Closes task 21121.
14299 - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
14300 December 2016 (of which ~126 were still functional) with a list of
14301 151 fallbacks (32 new, 119 unchanged, 58 removed) generated in May
14302 2017. Resolves ticket 21564.
14304 o Minor features (hidden services, logging):
14305 - Log a message when a hidden service descriptor has fewer
14306 introduction points than specified in
14307 HiddenServiceNumIntroductionPoints. Closes tickets 21598.
14308 - Log a message when a hidden service reaches its introduction point
14309 circuit limit, and when that limit is reset. Follow up to ticket
14310 21594; closes ticket 21622.
14311 - Warn user if multiple entries in EntryNodes and at least one
14312 HiddenService are used together. Pinning EntryNodes along with a
14313 hidden service can be possibly harmful; for instance see ticket
14314 14917 or 21155. Closes ticket 21155.
14316 o Minor features (linux seccomp2 sandbox):
14317 - We now have a document storage backend compatible with the Linux
14318 seccomp2 sandbox. This backend is used for consensus documents and
14319 diffs between them; in the long term, we'd like to use it for
14320 unparseable directory material too. Closes ticket 21645
14321 - Increase the maximum allowed size passed to mprotect(PROT_WRITE)
14322 from 1MB to 16MB. This was necessary with the glibc allocator in
14323 order to allow worker threads to allocate more memory -- which in
14324 turn is necessary because of our new use of worker threads for
14325 compression. Closes ticket 22096.
14327 o Minor features (logging):
14328 - Log files are no longer created world-readable by default.
14329 (Previously, most distributors would store the logs in a non-
14330 world-readable location to prevent inappropriate access. This
14331 change is an extra precaution.) Closes ticket 21729; patch
14334 o Minor features (performance):
14335 - Our Keccak (SHA-3) implementation now accesses memory more
14336 efficiently, especially on little-endian systems. Closes
14338 - Add an O(1) implementation of channel_find_by_global_id(), to
14339 speed some controller functions.
14341 o Minor features (relay, configuration):
14342 - The MyFamily option may now be repeated as many times as desired,
14343 for relays that want to configure large families. Closes ticket
14344 4998; patch by Daniel Pinto.
14346 o Minor features (safety):
14347 - Add an explicit check to extrainfo_parse_entry_from_string() for
14348 NULL inputs. We don't believe this can actually happen, but it may
14349 help silence a warning from the Clang analyzer. Closes
14352 o Minor features (testing):
14353 - Add a "--disable-memory-sentinels" feature to help with fuzzing.
14354 When Tor is compiled with this option, we disable a number of
14355 redundant memory-safety failsafes that are intended to stop bugs
14356 from becoming security issues. This makes it easier to hunt for
14357 bugs that would be security issues without the failsafes turned
14358 on. Closes ticket 21439.
14359 - Add a general event-tracing instrumentation support to Tor. This
14360 subsystem will enable developers and researchers to add fine-
14361 grained instrumentation to their Tor instances, for use when
14362 examining Tor network performance issues. There are no trace
14363 events yet, and event-tracing is off by default unless enabled at
14364 compile time. Implements ticket 13802.
14365 - Improve our version parsing tests: add tests for typical version
14366 components, add tests for invalid versions, including numeric
14367 range and non-numeric prefixes. Unit tests 21278, 21450, and
14368 21507. Partially implements 21470.
14370 o Minor bugfixes (bandwidth accounting):
14371 - Roll over monthly accounting at the configured hour and minute,
14372 rather than always at 00:00. Fixes bug 22245; bugfix on 0.0.9rc1.
14373 Found by Andrey Karpov with PVS-Studio.
14375 o Minor bugfixes (code correctness):
14376 - Accurately identify client connections by their lack of peer
14377 authentication. This means that we bail out earlier if asked to
14378 extend to a client. Follow-up to 21407. Fixes bug 21406; bugfix
14381 o Minor bugfixes (configuration):
14382 - Do not crash when starting with LearnCircuitBuildTimeout 0. Fixes
14383 bug 22252; bugfix on 0.2.9.3-alpha.
14385 o Minor bugfixes (connection lifespan):
14386 - Allow more control over how long TLS connections are kept open:
14387 unify CircuitIdleTimeout and PredictedPortsRelevanceTime into a
14388 single option called CircuitsAvailableTimeout. Also, allow the
14389 consensus to control the default values for both this preference
14390 and the lifespan of relay-to-relay connections. Fixes bug 17592;
14391 bugfix on 0.2.5.5-alpha.
14392 - Increase the initial circuit build timeout testing frequency, to
14393 help ensure that ReducedConnectionPadding clients finish learning
14394 a timeout before their orconn would expire. The initial testing
14395 rate was set back in the days of TAP and before the Tor Browser
14396 updater, when we had to be much more careful about new clients
14397 making lots of circuits. With this change, a circuit build timeout
14398 is learned in about 15-20 minutes, instead of 100-120 minutes.
14400 o Minor bugfixes (controller):
14401 - GETINFO onions/current and onions/detached no longer respond with
14402 551 on empty lists. Fixes bug 21329; bugfix on 0.2.7.1-alpha.
14403 - Trigger HS descriptor events on the control port when the client
14404 fails to pick a hidden service directory for a hidden service.
14405 This can happen if all the hidden service directories are in
14406 ExcludeNodes, or they have all been queried within the last 15
14407 minutes. Fixes bug 22042; bugfix on 0.2.5.2-alpha.
14409 o Minor bugfixes (directory authority):
14410 - When rejecting a router descriptor for running an obsolete version
14411 of Tor without ntor support, warn about the obsolete tor version,
14412 not the missing ntor key. Fixes bug 20270; bugfix on 0.2.9.3-alpha.
14413 - Prevent the shared randomness subsystem from asserting when
14414 initialized by a bridge authority with an incomplete configuration
14415 file. Fixes bug 21586; bugfix on 0.2.9.8.
14417 o Minor bugfixes (exit-side DNS):
14418 - Fix an untriggerable assertion that checked the output of a
14419 libevent DNS error, so that the assertion actually behaves as
14420 expected. Fixes bug 22244; bugfix on 0.2.0.20-rc. Found by Andrey
14421 Karpov using PVS-Studio.
14423 o Minor bugfixes (fallback directories):
14424 - Make the usage example in updateFallbackDirs.py actually work, and
14425 explain what it does. Fixes bug 22270; bugfix on 0.3.0.3-alpha.
14426 - Decrease the guard flag average required to be a fallback. This
14427 allows us to keep relays that have their guard flag removed when
14428 they restart. Fixes bug 20913; bugfix on 0.2.8.1-alpha.
14429 - Decrease the minimum number of fallbacks to 100. Fixes bug 20913;
14430 bugfix on 0.2.8.1-alpha.
14431 - Make sure fallback directory mirrors have the same address, port,
14432 and relay identity key for at least 30 days before they are
14433 selected. Fixes bug 20913; bugfix on 0.2.8.1-alpha.
14435 o Minor bugfixes (hidden services):
14436 - Stop printing a cryptic warning when a hidden service gets a
14437 request to connect to a virtual port that it hasn't configured.
14438 Fixes bug 16706; bugfix on 0.2.6.3-alpha.
14439 - Simplify hidden service descriptor creation by using an existing
14440 flag to check if an introduction point is established. Fixes bug
14441 21599; bugfix on 0.2.7.2-alpha.
14443 o Minor bugfixes (memory leak):
14444 - Fix a small memory leak at exit from the backtrace handler code.
14445 Fixes bug 21788; bugfix on 0.2.5.2-alpha. Patch from Daniel Pinto.
14447 o Minor bugfixes (protocol, logging):
14448 - Downgrade a log statement about unexpected relay cells from "bug"
14449 to "protocol warning", because there is at least one use case
14450 where it can be triggered by a buggy tor implementation. Fixes bug
14451 21293; bugfix on 0.1.1.14-alpha.
14453 o Minor bugfixes (testing):
14454 - Use unbuffered I/O for utility functions around the
14455 process_handle_t type. This fixes unit test failures reported on
14456 OpenBSD and FreeBSD. Fixes bug 21654; bugfix on 0.2.3.1-alpha.
14457 - Make display of captured unit test log messages consistent. Fixes
14458 bug 21510; bugfix on 0.2.9.3-alpha.
14459 - Make test-network.sh always call chutney's test-network.sh.
14460 Previously, this only worked on systems which had bash installed,
14461 due to some bash-specific code in the script. Fixes bug 19699;
14462 bugfix on 0.3.0.4-rc. Follow-up to ticket 21581.
14464 o Minor bugfixes (voting consistency):
14465 - Reject version numbers with non-numeric prefixes (such as +, -, or
14466 whitespace). Disallowing whitespace prevents differential version
14467 parsing between POSIX-based and Windows platforms. Fixes bug 21507
14468 and part of 21508; bugfix on 0.0.8pre1.
14470 o Minor bugfixes (windows, relay):
14471 - Resolve "Failure from drain_fd: No error" warnings on Windows
14472 relays. Fixes bug 21540; bugfix on 0.2.6.3-alpha.
14474 o Code simplification and refactoring:
14475 - Break up the 630-line function connection_dir_client_reached_eof()
14476 into a dozen smaller functions. This change should help
14477 maintainability and readability of the client directory code.
14478 - Isolate our use of the openssl headers so that they are only
14479 included from our crypto wrapper modules, and from tests that
14480 examine those modules' internals. Closes ticket 21841.
14481 - Simplify our API to launch directory requests, making it more
14482 extensible and less error-prone. Now it's easier to add extra
14483 headers to directory requests. Closes ticket 21646.
14484 - Our base64 decoding functions no longer overestimate the output
14485 space that they need when parsing unpadded inputs. Closes
14487 - Remove unused "ROUTER_ADDED_NOTIFY_GENERATOR" internal value.
14488 Resolves ticket 22213.
14489 - The logic that directory caches use to spool request to clients,
14490 serving them one part at a time so as not to allocate too much
14491 memory, has been refactored for consistency. Previously there was
14492 a separate spooling implementation per type of spoolable data. Now
14493 there is one common spooling implementation, with extensible data
14494 types. Closes ticket 21651.
14495 - Tor's compression module now supports multiple backends. Part of
14496 the implementation for proposal 278; closes ticket 21663.
14499 - Clarify the behavior of the KeepAliveIsolateSOCKSAuth sub-option.
14500 Closes ticket 21873.
14501 - Correct documentation about the default DataDirectory value.
14502 Closes ticket 21151.
14503 - Document the default behavior of NumEntryGuards and
14504 NumDirectoryGuards correctly. Fixes bug 21715; bugfix
14506 - Document key=value pluggable transport arguments for Bridge lines
14507 in torrc. Fixes bug 20341; bugfix on 0.2.5.1-alpha.
14508 - Note that bandwidth-limiting options don't affect TCP headers or
14509 DNS. Closes ticket 17170.
14511 o Removed features (configuration options, all in ticket 22060):
14512 - These configuration options are now marked Obsolete, and no longer
14513 have any effect: AllowInvalidNodes, AllowSingleHopCircuits,
14514 AllowSingleHopExits, ExcludeSingleHopRelays, FastFirstHopPK,
14515 TLSECGroup, WarnUnsafeSocks. They were first marked as deprecated
14516 in 0.2.9.2-alpha and have now been removed. The previous default
14517 behavior is now always chosen; the previous (less secure) non-
14518 default behavior is now unavailable.
14519 - CloseHSClientCircuitsImmediatelyOnTimeout and
14520 CloseHSServiceRendCircuitsImmediatelyOnTimeout were deprecated in
14521 0.2.9.2-alpha and now have been removed. HS circuits never close
14522 on circuit build timeout; they have a longer timeout period.
14523 - {Control,DNS,Dir,Socks,Trans,NATD,OR}ListenAddress were deprecated
14524 in 0.2.9.2-alpha and now have been removed. Use the ORPort option
14525 (and others) to configure listen-only and advertise-only addresses.
14527 o Removed features (tools):
14528 - We've removed the tor-checkkey tool from src/tools. Long ago, we
14529 used it to help people detect RSA keys that were generated by
14530 versions of Debian affected by CVE-2008-0166. But those keys have
14531 been out of circulation for ages, and this tool is no longer
14532 required. Closes ticket 21842.
14535 Changes in version 0.3.0.7 - 2017-05-15
14536 Tor 0.3.0.7 fixes a medium-severity security bug in earlier versions
14537 of Tor 0.3.0.x, where an attacker could cause a Tor relay process
14538 to exit. Relays running earlier versions of Tor 0.3.0.x should upgrade;
14539 clients are not affected.
14541 o Major bugfixes (hidden service directory, security):
14542 - Fix an assertion failure in the hidden service directory code, which
14543 could be used by an attacker to remotely cause a Tor relay process to
14544 exit. Relays running earlier versions of Tor 0.3.0.x should upgrade.
14545 should upgrade. This security issue is tracked as TROVE-2017-002.
14546 Fixes bug 22246; bugfix on 0.3.0.1-alpha.
14549 - Update geoip and geoip6 to the May 2 2017 Maxmind GeoLite2
14552 o Minor features (future-proofing):
14553 - Tor no longer refuses to download microdescriptors or descriptors
14554 if they are listed as "published in the future". This change will
14555 eventually allow us to stop listing meaningful "published" dates
14556 in microdescriptor consensuses, and thereby allow us to reduce the
14557 resources required to download consensus diffs by over 50%.
14558 Implements part of ticket 21642; implements part of proposal 275.
14560 o Minor bugfixes (Linux seccomp2 sandbox):
14561 - The getpid() system call is now permitted under the Linux seccomp2
14562 sandbox, to avoid crashing with versions of OpenSSL (and other
14563 libraries) that attempt to learn the process's PID by using the
14564 syscall rather than the VDSO code. Fixes bug 21943; bugfix
14568 Changes in version 0.3.0.6 - 2017-04-26
14569 Tor 0.3.0.6 is the first stable release of the Tor 0.3.0 series.
14571 With the 0.3.0 series, clients and relays now use Ed25519 keys to
14572 authenticate their link connections to relays, rather than the old
14573 RSA1024 keys that they used before. (Circuit crypto has been
14574 Curve25519-authenticated since 0.2.4.8-alpha.) We have also replaced
14575 the guard selection and replacement algorithm to behave more robustly
14576 in the presence of unreliable networks, and to resist guard-
14579 This series also includes numerous other small features and bugfixes,
14580 along with more groundwork for the upcoming hidden-services revamp.
14582 Per our stable release policy, we plan to support the Tor 0.3.0
14583 release series for at least the next nine months, or for three months
14584 after the first stable release of the 0.3.1 series: whichever is
14585 longer. If you need a release with long-term support, we recommend
14586 that you stay with the 0.2.9 series.
14588 Below are the changes since 0.3.0.5-rc. For a list of all changes
14589 since 0.2.9, see the ReleaseNotes file.
14591 o Minor features (geoip):
14592 - Update geoip and geoip6 to the April 4 2017 Maxmind GeoLite2
14595 o Minor bugfixes (control port):
14596 - The GETINFO extra-info/digest/<digest> command was broken because
14597 of a wrong base16 decode return value check, introduced when
14598 refactoring that API. Fixes bug 22034; bugfix on 0.2.9.1-alpha.
14600 o Minor bugfixes (crash prevention):
14601 - Fix a (currently untriggerable, but potentially dangerous) crash
14602 bug when base32-encoding inputs whose sizes are not a multiple of
14603 5. Fixes bug 21894; bugfix on 0.2.9.1-alpha.
14606 Changes in version 0.3.0.5-rc - 2017-04-05
14607 Tor 0.3.0.5-rc fixes a few remaining bugs, large and small, in the
14608 0.3.0 release series.
14610 This is the second release candidate in the Tor 0.3.0 series, and has
14611 much fewer changes than the first. If we find no new bugs or
14612 regressions here, the first stable 0.3.0 release will be nearly
14615 o Major bugfixes (crash, directory connections):
14616 - Fix a rare crash when sending a begin cell on a circuit whose
14617 linked directory connection had already been closed. Fixes bug
14618 21576; bugfix on 0.2.9.3-alpha. Reported by Alec Muffett.
14620 o Major bugfixes (guard selection):
14621 - Fix a guard selection bug where Tor would refuse to bootstrap in
14622 some cases if the user swapped a bridge for another bridge in
14623 their configuration file. Fixes bug 21771; bugfix on 0.3.0.1-alpha.
14624 Reported by "torvlnt33r".
14626 o Minor features (geoip):
14627 - Update geoip and geoip6 to the March 7 2017 Maxmind GeoLite2
14630 o Minor bugfix (compilation):
14631 - Fix a warning when compiling hs_service.c. Previously, it had no
14632 exported symbols when compiled for libor.a, resulting in a
14633 compilation warning from clang. Fixes bug 21825; bugfix
14636 o Minor bugfixes (hidden services):
14637 - Make hidden services check for failed intro point connections,
14638 even when they have exceeded their intro point creation limit.
14639 Fixes bug 21596; bugfix on 0.2.7.2-alpha. Reported by Alec Muffett.
14640 - Make hidden services with 8 to 10 introduction points check for
14641 failed circuits immediately after startup. Previously, they would
14642 wait for 5 minutes before performing their first checks. Fixes bug
14643 21594; bugfix on 0.2.3.9-alpha. Reported by Alec Muffett.
14645 o Minor bugfixes (memory leaks):
14646 - Fix a memory leak when using GETCONF on a port option. Fixes bug
14647 21682; bugfix on 0.3.0.3-alpha.
14649 o Minor bugfixes (relay):
14650 - Avoid a double-marked-circuit warning that could happen when we
14651 receive DESTROY cells under heavy load. Fixes bug 20059; bugfix
14654 o Minor bugfixes (tests):
14655 - Run the entry_guard_parse_from_state_full() test with the time set
14656 to a specific date. (The guard state that this test was parsing
14657 contained guards that had expired since the test was first
14658 written.) Fixes bug 21799; bugfix on 0.3.0.1-alpha.
14661 - Update the description of the directory server options in the
14662 manual page, to clarify that a relay no longer needs to set
14663 DirPort in order to be a directory cache. Closes ticket 21720.
14667 Changes in version 0.2.8.13 - 2017-03-03
14668 Tor 0.2.8.13 backports a security fix from later Tor
14669 releases. Anybody running Tor 0.2.8.12 or earlier should upgrade to this
14670 this release, if for some reason they cannot upgrade to a later
14671 release series, and if they build Tor with the --enable-expensive-hardening
14674 Note that support for Tor 0.2.8.x is ending next year: we will not issue
14675 any fixes for the Tor 0.2.8.x series after 1 Jan 2018. If you need
14676 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
14678 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
14679 - Fix an integer underflow bug when comparing malformed Tor
14680 versions. This bug could crash Tor when built with
14681 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
14682 0.2.9.8, which were built with -ftrapv by default. In other cases
14683 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
14684 on 0.0.8pre1. Found by OSS-Fuzz.
14686 o Minor features (geoip):
14687 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
14691 Changes in version 0.2.7.7 - 2017-03-03
14692 Tor 0.2.7.7 backports a number of security fixes from later Tor
14693 releases. Anybody running Tor 0.2.7.6 or earlier should upgrade to
14694 this release, if for some reason they cannot upgrade to a later
14697 Note that support for Tor 0.2.7.x is ending this year: we will not issue
14698 any fixes for the Tor 0.2.7.x series after 1 August 2017. If you need
14699 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
14701 o Directory authority changes (backport from 0.2.8.5-rc):
14702 - Urras is no longer a directory authority. Closes ticket 19271.
14704 o Directory authority changes (backport from 0.2.9.2-alpha):
14705 - The "Tonga" bridge authority has been retired; the new bridge
14706 authority is "Bifroest". Closes tickets 19728 and 19690.
14708 o Directory authority key updates (backport from 0.2.8.1-alpha):
14709 - Update the V3 identity key for the dannenberg directory authority:
14710 it was changed on 18 November 2015. Closes task 17906. Patch
14713 o Major bugfixes (parsing, security, backport from 0.2.9.8):
14714 - Fix a bug in parsing that could cause clients to read a single
14715 byte past the end of an allocated region. This bug could be used
14716 to cause hardened clients (built with --enable-expensive-hardening)
14717 to crash if they tried to visit a hostile hidden service. Non-
14718 hardened clients are only affected depending on the details of
14719 their platform's memory allocator. Fixes bug 21018; bugfix on
14720 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
14721 2016-12-002 and as CVE-2016-1254.
14723 o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha):
14724 - Stop a crash that could occur when a client running with DNSPort
14725 received a query with multiple address types, and the first
14726 address type was not supported. Found and fixed by Scott Dial.
14727 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
14728 - Prevent a class of security bugs caused by treating the contents
14729 of a buffer chunk as if they were a NUL-terminated string. At
14730 least one such bug seems to be present in all currently used
14731 versions of Tor, and would allow an attacker to remotely crash
14732 most Tor instances, especially those compiled with extra compiler
14733 hardening. With this defense in place, such bugs can't crash Tor,
14734 though we should still fix them as they occur. Closes ticket
14735 20384 (TROVE-2016-10-001).
14737 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
14738 - Avoid a difficult-to-trigger heap corruption attack when extending
14739 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
14740 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
14741 Reported by Guido Vranken.
14743 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
14744 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
14745 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
14747 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
14748 - If OpenSSL fails to generate an RSA key, do not retain a dangling
14749 pointer to the previous (uninitialized) key value. The impact here
14750 should be limited to a difficult-to-trigger crash, if OpenSSL is
14751 running an engine that makes key generation failures possible, or
14752 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
14753 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
14756 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
14757 - Fix an integer underflow bug when comparing malformed Tor
14758 versions. This bug could crash Tor when built with
14759 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
14760 0.2.9.8, which were built with -ftrapv by default. In other cases
14761 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
14762 on 0.0.8pre1. Found by OSS-Fuzz.
14764 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
14765 - Make memwipe() do nothing when passed a NULL pointer or buffer of
14766 zero size. Check size argument to memwipe() for underflow. Fixes
14767 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
14770 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
14771 - Make Tor survive errors involving connections without a
14772 corresponding event object. Previously we'd fail with an
14773 assertion; now we produce a log message. Related to bug 16248.
14775 o Minor features (geoip):
14776 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
14780 Changes in version 0.2.6.11 - 2017-03-03
14781 Tor 0.2.6.11 backports a number of security fixes from later Tor
14782 releases. Anybody running Tor 0.2.6.10 or earlier should upgrade to
14783 this release, if for some reason they cannot upgrade to a later
14786 Note that support for Tor 0.2.6.x is ending this year: we will not issue
14787 any fixes for the Tor 0.2.6.x series after 1 August 2017. If you need
14788 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
14790 o Directory authority changes (backport from 0.2.8.5-rc):
14791 - Urras is no longer a directory authority. Closes ticket 19271.
14793 o Directory authority changes (backport from 0.2.9.2-alpha):
14794 - The "Tonga" bridge authority has been retired; the new bridge
14795 authority is "Bifroest". Closes tickets 19728 and 19690.
14797 o Directory authority key updates (backport from 0.2.8.1-alpha):
14798 - Update the V3 identity key for the dannenberg directory authority:
14799 it was changed on 18 November 2015. Closes task 17906. Patch
14802 o Major features (security fixes, backport from 0.2.9.4-alpha):
14803 - Prevent a class of security bugs caused by treating the contents
14804 of a buffer chunk as if they were a NUL-terminated string. At
14805 least one such bug seems to be present in all currently used
14806 versions of Tor, and would allow an attacker to remotely crash
14807 most Tor instances, especially those compiled with extra compiler
14808 hardening. With this defense in place, such bugs can't crash Tor,
14809 though we should still fix them as they occur. Closes ticket
14810 20384 (TROVE-2016-10-001).
14812 o Major bugfixes (parsing, security, backport from 0.2.9.8):
14813 - Fix a bug in parsing that could cause clients to read a single
14814 byte past the end of an allocated region. This bug could be used
14815 to cause hardened clients (built with --enable-expensive-hardening)
14816 to crash if they tried to visit a hostile hidden service. Non-
14817 hardened clients are only affected depending on the details of
14818 their platform's memory allocator. Fixes bug 21018; bugfix on
14819 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
14820 2016-12-002 and as CVE-2016-1254.
14822 o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha):
14823 - Stop a crash that could occur when a client running with DNSPort
14824 received a query with multiple address types, and the first
14825 address type was not supported. Found and fixed by Scott Dial.
14826 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
14828 o Major bugfixes (security, correctness, backport from 0.2.7.4-rc):
14829 - Fix an error that could cause us to read 4 bytes before the
14830 beginning of an openssl string. This bug could be used to cause
14831 Tor to crash on systems with unusual malloc implementations, or
14832 systems with unusual hardening installed. Fixes bug 17404; bugfix
14835 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
14836 - Avoid a difficult-to-trigger heap corruption attack when extending
14837 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
14838 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
14839 Reported by Guido Vranken.
14841 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
14842 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
14843 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
14845 o Major bugfixes (guard selection, backport from 0.2.7.6):
14846 - Actually look at the Guard flag when selecting a new directory
14847 guard. When we implemented the directory guard design, we
14848 accidentally started treating all relays as if they have the Guard
14849 flag during guard selection, leading to weaker anonymity and worse
14850 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
14853 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
14854 - If OpenSSL fails to generate an RSA key, do not retain a dangling
14855 pointer to the previous (uninitialized) key value. The impact here
14856 should be limited to a difficult-to-trigger crash, if OpenSSL is
14857 running an engine that makes key generation failures possible, or
14858 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
14859 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
14862 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
14863 - Fix an integer underflow bug when comparing malformed Tor
14864 versions. This bug could crash Tor when built with
14865 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
14866 0.2.9.8, which were built with -ftrapv by default. In other cases
14867 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
14868 on 0.0.8pre1. Found by OSS-Fuzz.
14870 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
14871 - Make memwipe() do nothing when passed a NULL pointer or buffer of
14872 zero size. Check size argument to memwipe() for underflow. Fixes
14873 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
14876 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
14877 - Make Tor survive errors involving connections without a
14878 corresponding event object. Previously we'd fail with an
14879 assertion; now we produce a log message. Related to bug 16248.
14881 o Minor features (geoip):
14882 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
14885 o Minor bugfixes (compilation, backport from 0.2.7.6):
14886 - Fix a compilation warning with Clang 3.6: Do not check the
14887 presence of an address which can never be NULL. Fixes bug 17781.
14890 Changes in version 0.2.5.13 - 2017-03-03
14891 Tor 0.2.5.13 backports a number of security fixes from later Tor
14892 releases. Anybody running Tor 0.2.5.13 or earlier should upgrade to
14893 this release, if for some reason they cannot upgrade to a later
14896 Note that support for Tor 0.2.5.x is ending next year: we will not issue
14897 any fixes for the Tor 0.2.5.x series after 1 May 2018. If you need
14898 a Tor release series with longer-term support, we recommend Tor 0.2.9.x.
14900 o Directory authority changes (backport from 0.2.8.5-rc):
14901 - Urras is no longer a directory authority. Closes ticket 19271.
14903 o Directory authority changes (backport from 0.2.9.2-alpha):
14904 - The "Tonga" bridge authority has been retired; the new bridge
14905 authority is "Bifroest". Closes tickets 19728 and 19690.
14907 o Directory authority key updates (backport from 0.2.8.1-alpha):
14908 - Update the V3 identity key for the dannenberg directory authority:
14909 it was changed on 18 November 2015. Closes task 17906. Patch
14912 o Major features (security fixes, backport from 0.2.9.4-alpha):
14913 - Prevent a class of security bugs caused by treating the contents
14914 of a buffer chunk as if they were a NUL-terminated string. At
14915 least one such bug seems to be present in all currently used
14916 versions of Tor, and would allow an attacker to remotely crash
14917 most Tor instances, especially those compiled with extra compiler
14918 hardening. With this defense in place, such bugs can't crash Tor,
14919 though we should still fix them as they occur. Closes ticket
14920 20384 (TROVE-2016-10-001).
14922 o Major bugfixes (parsing, security, backport from 0.2.9.8):
14923 - Fix a bug in parsing that could cause clients to read a single
14924 byte past the end of an allocated region. This bug could be used
14925 to cause hardened clients (built with --enable-expensive-hardening)
14926 to crash if they tried to visit a hostile hidden service. Non-
14927 hardened clients are only affected depending on the details of
14928 their platform's memory allocator. Fixes bug 21018; bugfix on
14929 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
14930 2016-12-002 and as CVE-2016-1254.
14932 o Major bugfixes (security, client, DNS proxy, backport from 0.2.8.3-alpha):
14933 - Stop a crash that could occur when a client running with DNSPort
14934 received a query with multiple address types, and the first
14935 address type was not supported. Found and fixed by Scott Dial.
14936 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
14938 o Major bugfixes (security, correctness, backport from 0.2.7.4-rc):
14939 - Fix an error that could cause us to read 4 bytes before the
14940 beginning of an openssl string. This bug could be used to cause
14941 Tor to crash on systems with unusual malloc implementations, or
14942 systems with unusual hardening installed. Fixes bug 17404; bugfix
14945 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
14946 - Avoid a difficult-to-trigger heap corruption attack when extending
14947 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
14948 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
14949 Reported by Guido Vranken.
14951 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
14952 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
14953 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
14955 o Major bugfixes (guard selection, backport from 0.2.7.6):
14956 - Actually look at the Guard flag when selecting a new directory
14957 guard. When we implemented the directory guard design, we
14958 accidentally started treating all relays as if they have the Guard
14959 flag during guard selection, leading to weaker anonymity and worse
14960 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
14963 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
14964 - If OpenSSL fails to generate an RSA key, do not retain a dangling
14965 pointer to the previous (uninitialized) key value. The impact here
14966 should be limited to a difficult-to-trigger crash, if OpenSSL is
14967 running an engine that makes key generation failures possible, or
14968 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
14969 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
14972 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
14973 - Fix an integer underflow bug when comparing malformed Tor
14974 versions. This bug could crash Tor when built with
14975 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
14976 0.2.9.8, which were built with -ftrapv by default. In other cases
14977 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
14978 on 0.0.8pre1. Found by OSS-Fuzz.
14980 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
14981 - Make memwipe() do nothing when passed a NULL pointer or buffer of
14982 zero size. Check size argument to memwipe() for underflow. Fixes
14983 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
14986 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
14987 - Make Tor survive errors involving connections without a
14988 corresponding event object. Previously we'd fail with an
14989 assertion; now we produce a log message. Related to bug 16248.
14991 o Minor features (geoip):
14992 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
14995 o Minor bugfixes (compilation, backport from 0.2.7.6):
14996 - Fix a compilation warning with Clang 3.6: Do not check the
14997 presence of an address which can never be NULL. Fixes bug 17781.
14999 o Minor bugfixes (crypto error-handling, backport from 0.2.7.2-alpha):
15000 - Check for failures from crypto_early_init, and refuse to continue.
15001 A previous typo meant that we could keep going with an
15002 uninitialized crypto library, and would have OpenSSL initialize
15003 its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
15004 when implementing ticket 4900. Patch by "teor".
15006 o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
15007 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
15008 a client authorized hidden service. Fixes bug 15823; bugfix
15012 Changes in version 0.2.4.28 - 2017-03-03
15013 Tor 0.2.4.28 backports a number of security fixes from later Tor
15014 releases. Anybody running Tor 0.2.4.27 or earlier should upgrade to
15015 this release, if for some reason they cannot upgrade to a later
15018 Note that support for Tor 0.2.4.x is ending soon: we will not issue
15019 any fixes for the Tor 0.2.4.x series after 1 August 2017. If you need
15020 a Tor release series with long-term support, we recommend Tor 0.2.9.x.
15022 o Directory authority changes (backport from 0.2.8.5-rc):
15023 - Urras is no longer a directory authority. Closes ticket 19271.
15025 o Directory authority changes (backport from 0.2.9.2-alpha):
15026 - The "Tonga" bridge authority has been retired; the new bridge
15027 authority is "Bifroest". Closes tickets 19728 and 19690.
15029 o Directory authority key updates (backport from 0.2.8.1-alpha):
15030 - Update the V3 identity key for the dannenberg directory authority:
15031 it was changed on 18 November 2015. Closes task 17906. Patch
15034 o Major features (security fixes, backport from 0.2.9.4-alpha):
15035 - Prevent a class of security bugs caused by treating the contents
15036 of a buffer chunk as if they were a NUL-terminated string. At
15037 least one such bug seems to be present in all currently used
15038 versions of Tor, and would allow an attacker to remotely crash
15039 most Tor instances, especially those compiled with extra compiler
15040 hardening. With this defense in place, such bugs can't crash Tor,
15041 though we should still fix them as they occur. Closes ticket
15042 20384 (TROVE-2016-10-001).
15044 o Major bugfixes (parsing, security, backport from 0.2.9.8):
15045 - Fix a bug in parsing that could cause clients to read a single
15046 byte past the end of an allocated region. This bug could be used
15047 to cause hardened clients (built with --enable-expensive-hardening)
15048 to crash if they tried to visit a hostile hidden service. Non-
15049 hardened clients are only affected depending on the details of
15050 their platform's memory allocator. Fixes bug 21018; bugfix on
15051 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
15052 2016-12-002 and as CVE-2016-1254.
15054 o Major bugfixes (security, correctness, backport from 0.2.7.4-rc):
15055 - Fix an error that could cause us to read 4 bytes before the
15056 beginning of an openssl string. This bug could be used to cause
15057 Tor to crash on systems with unusual malloc implementations, or
15058 systems with unusual hardening installed. Fixes bug 17404; bugfix
15061 o Major bugfixes (security, pointers, backport from 0.2.8.2-alpha):
15062 - Avoid a difficult-to-trigger heap corruption attack when extending
15063 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
15064 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
15065 Reported by Guido Vranken.
15067 o Major bugfixes (dns proxy mode, crash, backport from 0.2.8.2-alpha):
15068 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
15069 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
15071 o Major bugfixes (guard selection, backport from 0.2.7.6):
15072 - Actually look at the Guard flag when selecting a new directory
15073 guard. When we implemented the directory guard design, we
15074 accidentally started treating all relays as if they have the Guard
15075 flag during guard selection, leading to weaker anonymity and worse
15076 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
15079 o Major bugfixes (key management, backport from 0.2.8.3-alpha):
15080 - If OpenSSL fails to generate an RSA key, do not retain a dangling
15081 pointer to the previous (uninitialized) key value. The impact here
15082 should be limited to a difficult-to-trigger crash, if OpenSSL is
15083 running an engine that makes key generation failures possible, or
15084 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
15085 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
15088 o Major bugfixes (parsing, backported from 0.3.0.4-rc):
15089 - Fix an integer underflow bug when comparing malformed Tor
15090 versions. This bug could crash Tor when built with
15091 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
15092 0.2.9.8, which were built with -ftrapv by default. In other cases
15093 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
15094 on 0.0.8pre1. Found by OSS-Fuzz.
15096 o Minor features (security, memory erasure, backport from 0.2.8.1-alpha):
15097 - Make memwipe() do nothing when passed a NULL pointer or buffer of
15098 zero size. Check size argument to memwipe() for underflow. Fixes
15099 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
15102 o Minor features (bug-resistance, backport from 0.2.8.2-alpha):
15103 - Make Tor survive errors involving connections without a
15104 corresponding event object. Previously we'd fail with an
15105 assertion; now we produce a log message. Related to bug 16248.
15107 o Minor features (DoS-resistance, backport from 0.2.7.1-alpha):
15108 - Make it harder for attackers to overload hidden services with
15109 introductions, by blocking multiple introduction requests on the
15110 same circuit. Resolves ticket 15515.
15112 o Minor features (geoip):
15113 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
15116 o Minor bugfixes (compilation, backport from 0.2.7.6):
15117 - Fix a compilation warning with Clang 3.6: Do not check the
15118 presence of an address which can never be NULL. Fixes bug 17781.
15120 o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
15121 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
15122 a client authorized hidden service. Fixes bug 15823; bugfix
15126 Changes in version 0.3.0.4-rc - 2017-03-01
15127 Tor 0.3.0.4-rc fixes some remaining bugs, large and small, in the
15128 0.3.0 release series, and introduces a few reliability features to
15129 keep them from coming back.
15131 This is the first release candidate in the Tor 0.3.0 series. If we
15132 find no new bugs or regressions here, the first stable 0.3.0 release
15133 will be nearly identical to it.
15135 o Major bugfixes (bridges):
15136 - When the same bridge is configured multiple times with the same
15137 identity, but at different address:port combinations, treat those
15138 bridge instances as separate guards. This fix restores the ability
15139 of clients to configure the same bridge with multiple pluggable
15140 transports. Fixes bug 21027; bugfix on 0.3.0.1-alpha.
15142 o Major bugfixes (hidden service directory v3):
15143 - Stop crashing on a failed v3 hidden service descriptor lookup
15144 failure. Fixes bug 21471; bugfixes on 0.3.0.1-alpha.
15146 o Major bugfixes (parsing):
15147 - When parsing a malformed content-length field from an HTTP
15148 message, do not read off the end of the buffer. This bug was a
15149 potential remote denial-of-service attack against Tor clients and
15150 relays. A workaround was released in October 2016, to prevent this
15151 bug from crashing Tor. This is a fix for the underlying issue,
15152 which should no longer matter (if you applied the earlier patch).
15153 Fixes bug 20894; bugfix on 0.2.0.16-alpha. Bug found by fuzzing
15154 using AFL (http://lcamtuf.coredump.cx/afl/).
15155 - Fix an integer underflow bug when comparing malformed Tor
15156 versions. This bug could crash Tor when built with
15157 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
15158 0.2.9.8, which were built with -ftrapv by default. In other cases
15159 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
15160 on 0.0.8pre1. Found by OSS-Fuzz.
15162 o Minor feature (protocol versioning):
15163 - Add new protocol version for proposal 224. HSIntro now advertises
15164 version "3-4" and HSDir version "1-2". Fixes ticket 20656.
15166 o Minor features (directory authorities):
15167 - Directory authorities now reject descriptors that claim to be
15168 malformed versions of Tor. Helps prevent exploitation of
15170 - Reject version numbers with components that exceed INT32_MAX.
15171 Otherwise 32-bit and 64-bit platforms would behave inconsistently.
15172 Fixes bug 21450; bugfix on 0.0.8pre1.
15173 - Directory authorities now reject relays running versions
15174 0.2.9.1-alpha through 0.2.9.4-alpha, because those relays
15175 suffer from bug 20499 and don't keep their consensus cache
15176 up-to-date. Resolves ticket 20509.
15178 o Minor features (geoip):
15179 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
15182 o Minor features (reliability, crash):
15183 - Try better to detect problems in buffers where they might grow (or
15184 think they have grown) over 2 GB in size. Diagnostic for
15187 o Minor features (testing):
15188 - During 'make test-network-all', if tor logs any warnings, ask
15189 chutney to output them. Requires a recent version of chutney with
15190 the 21572 patch. Implements 21570.
15192 o Minor bugfixes (certificate expiration time):
15193 - Avoid using link certificates that don't become valid till some
15194 time in the future. Fixes bug 21420; bugfix on 0.2.4.11-alpha
15196 o Minor bugfixes (code correctness):
15197 - Repair a couple of (unreachable or harmless) cases of the risky
15198 comparison-by-subtraction pattern that caused bug 21278.
15199 - Remove a redundant check for the UseEntryGuards option from the
15200 options_transition_affects_guards() function. Fixes bug 21492;
15201 bugfix on 0.3.0.1-alpha.
15203 o Minor bugfixes (directory mirrors):
15204 - Allow relays to use directory mirrors without a DirPort: these
15205 relays need to be contacted over their ORPorts using a begindir
15206 connection. Fixes one case of bug 20711; bugfix on 0.2.8.2-alpha.
15207 - Clarify the message logged when a remote relay is unexpectedly
15208 missing an ORPort or DirPort: users were confusing this with a
15209 local port. Fixes another case of bug 20711; bugfix
15212 o Minor bugfixes (guards):
15213 - Don't warn about a missing guard state on timeout-measurement
15214 circuits: they aren't supposed to be using guards. Fixes an
15215 instance of bug 21007; bugfix on 0.3.0.1-alpha.
15216 - Silence a BUG() warning when attempting to use a guard whose
15217 descriptor we don't know, and make this scenario less likely to
15218 happen. Fixes bug 21415; bugfix on 0.3.0.1-alpha.
15220 o Minor bugfixes (hidden service):
15221 - Pass correct buffer length when encoding legacy ESTABLISH_INTRO
15222 cells. Previously, we were using sizeof() on a pointer, instead of
15223 the real destination buffer. Fortunately, that value was only used
15224 to double-check that there was enough room--which was already
15225 enforced elsewhere. Fixes bug 21553; bugfix on 0.3.0.1-alpha.
15227 o Minor bugfixes (testing):
15228 - Fix Raspbian build issues related to missing socket errno in
15229 test_util.c. Fixes bug 21116; bugfix on 0.2.8.2. Patch
15231 - Rename "make fuzz" to "make test-fuzz-corpora", since it doesn't
15232 actually fuzz anything. Fixes bug 21447; bugfix on 0.3.0.3-alpha.
15233 - Use bash in src/test/test-network.sh. This ensures we reliably
15234 call chutney's newer tools/test-network.sh when available. Fixes
15235 bug 21562; bugfix on 0.2.9.1-alpha.
15238 - Small fixes to the fuzzing documentation. Closes ticket 21472.
15241 Changes in version 0.2.9.10 - 2017-03-01
15242 Tor 0.2.9.10 backports a security fix from later Tor release. It also
15243 includes fixes for some major issues affecting directory authorities,
15244 LibreSSL compatibility, and IPv6 correctness.
15246 The Tor 0.2.9.x release series is now marked as a long-term-support
15247 series. We intend to backport security fixes to 0.2.9.x until at
15248 least January of 2020.
15250 o Major bugfixes (directory authority, 0.3.0.3-alpha):
15251 - During voting, when marking a relay as a probable sybil, do not
15252 clear its BadExit flag: sybils can still be bad in other ways
15253 too. (We still clear the other flags.) Fixes bug 21108; bugfix
15256 o Major bugfixes (IPv6 Exits, backport from 0.3.0.3-alpha):
15257 - Stop rejecting all IPv6 traffic on Exits whose exit policy rejects
15258 any IPv6 addresses. Instead, only reject a port over IPv6 if the
15259 exit policy rejects that port on more than an IPv6 /16 of
15260 addresses. This bug was made worse by 17027 in 0.2.8.1-alpha,
15261 which rejected a relay's own IPv6 address by default. Fixes bug
15262 21357; bugfix on commit 004f3f4e53 in 0.2.4.7-alpha.
15264 o Major bugfixes (parsing, also in 0.3.0.4-rc):
15265 - Fix an integer underflow bug when comparing malformed Tor
15266 versions. This bug could crash Tor when built with
15267 --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
15268 0.2.9.8, which were built with -ftrapv by default. In other cases
15269 it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
15270 on 0.0.8pre1. Found by OSS-Fuzz.
15272 o Minor features (directory authorities, also in 0.3.0.4-rc):
15273 - Directory authorities now reject descriptors that claim to be
15274 malformed versions of Tor. Helps prevent exploitation of
15276 - Reject version numbers with components that exceed INT32_MAX.
15277 Otherwise 32-bit and 64-bit platforms would behave inconsistently.
15278 Fixes bug 21450; bugfix on 0.0.8pre1.
15280 o Minor features (geoip):
15281 - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
15284 o Minor features (portability, compilation, backport from 0.3.0.3-alpha):
15285 - Autoconf now checks to determine if OpenSSL structures are opaque,
15286 instead of explicitly checking for OpenSSL version numbers. Part
15288 - Support building with recent LibreSSL code that uses opaque
15289 structures. Closes ticket 21359.
15291 o Minor bugfixes (code correctness, also in 0.3.0.4-rc):
15292 - Repair a couple of (unreachable or harmless) cases of the risky
15293 comparison-by-subtraction pattern that caused bug 21278.
15295 o Minor bugfixes (tor-resolve, backport from 0.3.0.3-alpha):
15296 - The tor-resolve command line tool now rejects hostnames over 255
15297 characters in length. Previously, it would silently truncate them,
15298 which could lead to bugs. Fixes bug 21280; bugfix on 0.0.9pre5.
15299 Patch by "junglefowl".
15302 Changes in version 0.3.0.3-alpha - 2017-02-03
15303 Tor 0.3.0.3-alpha fixes a few significant bugs introduced over the
15304 0.3.0.x development series, including some that could cause
15305 authorities to behave badly. There is also a fix for a longstanding
15306 bug that could prevent IPv6 exits from working. Tor 0.3.0.3-alpha also
15307 includes some smaller features and bugfixes.
15309 The Tor 0.3.0.x release series is now in patch-freeze: no additional
15310 features will be considered for inclusion in 0.3.0.x. We suspect that
15311 some bugs will probably remain, however, and we encourage people to
15314 o Major bugfixes (directory authority):
15315 - During voting, when marking a relay as a probable sybil, do not
15316 clear its BadExit flag: sybils can still be bad in other ways
15317 too. (We still clear the other flags.) Fixes bug 21108; bugfix
15319 - When deciding whether we have just found a router to be reachable,
15320 do not penalize it for not having performed an Ed25519 link
15321 handshake if it does not claim to support an Ed25519 handshake.
15322 Previously, we would treat such relays as non-running. Fixes bug
15323 21107; bugfix on 0.3.0.1-alpha.
15325 o Major bugfixes (entry guards):
15326 - Stop trying to build circuits through entry guards for which we
15327 have no descriptor. Also, stop crashing in the case that we *do*
15328 accidentally try to build a circuit in such a state. Fixes bug
15329 21242; bugfix on 0.3.0.1-alpha.
15331 o Major bugfixes (IPv6 Exits):
15332 - Stop rejecting all IPv6 traffic on Exits whose exit policy rejects
15333 any IPv6 addresses. Instead, only reject a port over IPv6 if the
15334 exit policy rejects that port on more than an IPv6 /16 of
15335 addresses. This bug was made worse by 17027 in 0.2.8.1-alpha,
15336 which rejected a relay's own IPv6 address by default. Fixes bug
15337 21357; bugfix on commit 004f3f4e53 in 0.2.4.7-alpha.
15339 o Minor feature (client):
15340 - Enable IPv6 traffic on the SocksPort by default. To disable this,
15341 a user will have to specify "NoIPv6Traffic". Closes ticket 21269.
15343 o Minor feature (fallback scripts):
15344 - Add a check_existing mode to updateFallbackDirs.py, which checks
15345 if fallbacks in the hard-coded list are working. Closes ticket
15346 20174. Patch by haxxpop.
15348 o Minor features (ciphersuite selection):
15349 - Clients now advertise a list of ciphersuites closer to the ones
15350 preferred by Firefox. Closes part of ticket 15426.
15351 - Allow relays to accept a wider range of ciphersuites, including
15352 chacha20-poly1305 and AES-CCM. Closes the other part of 15426.
15354 o Minor features (controller, configuration):
15355 - Each of the *Port options, such as SocksPort, ORPort, ControlPort,
15356 and so on, now comes with a __*Port variant that will not be saved
15357 to the torrc file by the controller's SAVECONF command. This
15358 change allows TorBrowser to set up a single-use domain socket for
15359 each time it launches Tor. Closes ticket 20956.
15360 - The GETCONF command can now query options that may only be
15361 meaningful in context-sensitive lists. This allows the controller
15362 to query the mixed SocksPort/__SocksPort style options introduced
15363 in feature 20956. Implements ticket 21300.
15365 o Minor features (portability, compilation):
15366 - Autoconf now checks to determine if OpenSSL structures are opaque,
15367 instead of explicitly checking for OpenSSL version numbers. Part
15369 - Support building with recent LibreSSL code that uses opaque
15370 structures. Closes ticket 21359.
15372 o Minor features (relay):
15373 - We now allow separation of exit and relay traffic to different
15374 source IP addresses, using the OutboundBindAddressExit and
15375 OutboundBindAddressOR options respectively. Closes ticket 17975.
15376 Written by Michael Sonntag.
15378 o Minor bugfix (logging):
15379 - Don't recommend the use of Tor2web in non-anonymous mode.
15380 Recommending Tor2web is a bad idea because the client loses all
15381 anonymity. Tor2web should only be used in specific cases by users
15382 who *know* and understand the issues. Fixes bug 21294; bugfix
15385 o Minor bugfixes (client):
15386 - Always recover from failures in extend_info_from_node(), in an
15387 attempt to prevent any recurrence of bug 21242. Fixes bug 21372;
15388 bugfix on 0.2.3.1-alpha.
15390 o Minor bugfixes (client, entry guards):
15391 - Fix a bug warning (with backtrace) when we fail a channel that
15392 circuits to fallback directories on it. Fixes bug 21128; bugfix
15394 - Fix a spurious bug warning (with backtrace) when removing an
15395 expired entry guard. Fixes bug 21129; bugfix on 0.3.0.1-alpha.
15396 - Fix a bug of the new guard algorithm where tor could stall for up
15397 to 10 minutes before retrying a guard after a long period of no
15398 network. Fixes bug 21052; bugfix on 0.3.0.1-alpha.
15399 - Do not try to build circuits until we have descriptors for our
15400 primary entry guards. Related to fix for bug 21242.
15402 o Minor bugfixes (configure, autoconf):
15403 - Rename the configure option --enable-expensive-hardening to
15404 --enable-fragile-hardening. Expensive hardening makes the tor
15405 daemon abort when some kinds of issues are detected. Thus, it
15406 makes tor more at risk of remote crashes but safer against RCE or
15407 heartbleed bug category. We now try to explain this issue in a
15408 message from the configure script. Fixes bug 21290; bugfix
15411 o Minor bugfixes (controller):
15412 - Restore the (deprecated) DROPGUARDS controller command. Fixes bug
15413 20824; bugfix on 0.3.0.1-alpha.
15415 o Minor bugfixes (hidden service):
15416 - Clean up the code for expiring intro points with no associated
15417 circuits. It was causing, rarely, a service with some expiring
15418 introduction points to not open enough additional introduction
15419 points. Fixes part of bug 21302; bugfix on 0.2.7.2-alpha.
15420 - Stop setting the torrc option HiddenServiceStatistics to "0" just
15421 because we're not a bridge or relay. Instead, we preserve whatever
15422 value the user set (or didn't set). Fixes bug 21150; bugfix
15424 - Resolve two possible underflows which could lead to creating and
15425 closing a lot of introduction point circuits in a non-stop loop.
15426 Fixes bug 21302; bugfix on 0.2.7.2-alpha.
15428 o Minor bugfixes (portability):
15429 - Use "OpenBSD" compiler macro instead of "OPENBSD" or "__OpenBSD__".
15430 It is supported by OpenBSD itself, and also by most OpenBSD
15431 variants (such as Bitrig). Fixes bug 20980; bugfix
15433 - When mapping a file of length greater than SIZE_MAX, do not
15434 silently truncate its contents. This issue could occur on 32 bit
15435 systems with large file support and files which are larger than 4
15436 GB. Fixes bug 21134; bugfix on 0.3.0.1-alpha.
15438 o Minor bugfixes (tor-resolve):
15439 - The tor-resolve command line tool now rejects hostnames over 255
15440 characters in length. Previously, it would silently truncate them,
15441 which could lead to bugs. Fixes bug 21280; bugfix on 0.0.9pre5.
15442 Patch by "junglefowl".
15444 o Minor bugfixes (Windows services):
15445 - Be sure to initialize the monotonic time subsystem before using
15446 it, even when running as an NT service. Fixes bug 21356; bugfix
15450 Changes in version 0.3.0.2-alpha - 2017-01-23
15451 Tor 0.3.0.2-alpha fixes a denial-of-service bug where an attacker could
15452 cause relays and clients to crash, even if they were not built with
15453 the --enable-expensive-hardening option. This bug affects all 0.2.9.x
15454 versions, and also affects 0.3.0.1-alpha: all relays running an affected
15455 version should upgrade.
15457 Tor 0.3.0.2-alpha also improves how exit relays and clients handle DNS
15458 time-to-live values, makes directory authorities enforce the 1-to-1
15459 mapping of relay RSA identity keys to ED25519 identity keys, fixes a
15460 client-side onion service reachability bug, does better at selecting
15461 the set of fallback directories, and more.
15463 o Major bugfixes (security, also in 0.2.9.9):
15464 - Downgrade the "-ftrapv" option from "always on" to "only on when
15465 --enable-expensive-hardening is provided." This hardening option, like
15466 others, can turn survivable bugs into crashes--and having it on by
15467 default made a (relatively harmless) integer overflow bug into a
15468 denial-of-service bug. Fixes bug 21278 (TROVE-2017-001); bugfix on
15471 o Major features (security):
15472 - Change the algorithm used to decide DNS TTLs on client and server
15473 side, to better resist DNS-based correlation attacks like the
15474 DefecTor attack of Greschbach, Pulls, Roberts, Winter, and
15475 Feamster. Now relays only return one of two possible DNS TTL
15476 values, and clients are willing to believe DNS TTL values up to 3
15477 hours long. Closes ticket 19769.
15479 o Major features (directory authority, security):
15480 - The default for AuthDirPinKeys is now 1: directory authorities
15481 will reject relays where the RSA identity key matches a previously
15482 seen value, but the Ed25519 key has changed. Closes ticket 18319.
15484 o Major bugfixes (client, guard, crash):
15485 - In circuit_get_global_origin_list(), return the actual list of
15486 origin circuits. The previous version of this code returned the
15487 list of all the circuits, and could have caused strange bugs,
15488 including possible crashes. Fixes bug 21118; bugfix
15491 o Major bugfixes (client, onion service, also in 0.2.9.9):
15492 - Fix a client-side onion service reachability bug, where multiple
15493 socks requests to an onion service (or a single slow request)
15494 could cause us to mistakenly mark some of the service's
15495 introduction points as failed, and we cache that failure so
15496 eventually we run out and can't reach the service. Also resolves a
15497 mysterious "Remote server sent bogus reason code 65021" log
15498 warning. The bug was introduced in ticket 17218, where we tried to
15499 remember the circuit end reason as a uint16_t, which mangled
15500 negative values. Partially fixes bug 21056 and fixes bug 20307;
15501 bugfix on 0.2.8.1-alpha.
15503 o Major bugfixes (DNS):
15504 - Fix a bug that prevented exit nodes from caching DNS records for
15505 more than 60 seconds. Fixes bug 19025; bugfix on 0.2.4.7-alpha.
15507 o Minor features (controller):
15508 - Add "GETINFO sr/current" and "GETINFO sr/previous" keys, to expose
15509 shared-random values to the controller. Closes ticket 19925.
15511 o Minor features (entry guards):
15512 - Add UseEntryGuards to TEST_OPTIONS_DEFAULT_VALUES in order to not
15513 break regression tests.
15514 - Require UseEntryGuards when UseBridges is set, in order to make
15515 sure bridges aren't bypassed. Resolves ticket 20502.
15517 o Minor features (fallback directories):
15518 - Select 200 fallback directories for each release. Closes
15520 - Allow 3 fallback relays per operator, which is safe now that we
15521 are choosing 200 fallback relays. Closes ticket 20912.
15522 - Exclude relays affected by bug 20499 from the fallback list.
15523 Exclude relays from the fallback list if they are running versions
15524 known to be affected by bug 20499, or if in our tests they deliver
15525 a stale consensus (i.e. one that expired more than 24 hours ago).
15526 Closes ticket 20539.
15527 - Reduce the minimum fallback bandwidth to 1 MByte/s. Part of
15529 - Require fallback directories to have the same address and port for
15530 7 days (now that we have enough relays with this stability).
15531 Relays whose OnionOO stability timer is reset on restart by bug
15532 18050 should upgrade to Tor 0.2.8.7 or later, which has a fix for
15533 this issue. Closes ticket 20880; maintains short-term fix
15535 - Require fallbacks to have flags for 90% of the time (weighted
15536 decaying average), rather than 95%. This allows at least 73% of
15537 clients to bootstrap in the first 5 seconds without contacting an
15538 authority. Part of ticket 18828.
15539 - Annotate updateFallbackDirs.py with the bandwidth and consensus
15540 weight for each candidate fallback. Closes ticket 20878.
15541 - Make it easier to change the output sort order of fallbacks.
15542 Closes ticket 20822.
15543 - Display the relay fingerprint when downloading consensuses from
15544 fallbacks. Closes ticket 20908.
15546 o Minor features (geoip, also in 0.2.9.9):
15547 - Update geoip and geoip6 to the January 4 2017 Maxmind GeoLite2
15550 o Minor features (next-gen onion service directories):
15551 - Remove the "EnableOnionServicesV3" consensus parameter that we
15552 introduced in 0.3.0.1-alpha: relays are now always willing to act
15553 as v3 onion service directories. Resolves ticket 19899.
15555 o Minor features (linting):
15556 - Enhance the changes file linter to warn on Tor versions that are
15557 prefixed with "tor-". Closes ticket 21096.
15559 o Minor features (logging):
15560 - In several places, describe unset ed25519 keys as "<unset>",
15561 rather than the scary "AAAAAAAA...AAA". Closes ticket 21037.
15563 o Minor bugfix (control protocol):
15564 - The reply to a "GETINFO config/names" request via the control
15565 protocol now spells the type "Dependent" correctly. This is a
15566 breaking change in the control protocol. (The field seems to be
15567 ignored by the most common known controllers.) Fixes bug 18146;
15568 bugfix on 0.1.1.4-alpha.
15570 o Minor bugfixes (bug resilience):
15571 - Fix an unreachable size_t overflow in base64_decode(). Fixes bug
15572 19222; bugfix on 0.2.0.9-alpha. Found by Guido Vranken; fixed by
15573 Hans Jerry Illikainen.
15575 o Minor bugfixes (build):
15576 - Replace obsolete Autoconf macros with their modern equivalent and
15577 prevent similar issues in the future. Fixes bug 20990; bugfix
15580 o Minor bugfixes (client, guards):
15581 - Fix bug where Tor would think that there are circuits waiting for
15582 better guards even though those circuits have been freed. Fixes
15583 bug 21142; bugfix on 0.3.0.1-alpha.
15585 o Minor bugfixes (config):
15586 - Don't assert on startup when trying to get the options list and
15587 LearnCircuitBuildTimeout is set to 0: we are currently parsing the
15588 options so of course they aren't ready yet. Fixes bug 21062;
15589 bugfix on 0.2.9.3-alpha.
15591 o Minor bugfixes (controller):
15592 - Make the GETINFO interface for inquiring about entry guards
15593 support the new guards backend. Fixes bug 20823; bugfix
15596 o Minor bugfixes (dead code):
15597 - Remove a redundant check for PidFile changes at runtime in
15598 options_transition_allowed(): this check is already performed
15599 regardless of whether the sandbox is active. Fixes bug 21123;
15600 bugfix on 0.2.5.4-alpha.
15602 o Minor bugfixes (documentation):
15603 - Update the tor manual page to document every option that can not
15604 be changed while tor is running. Fixes bug 21122.
15606 o Minor bugfixes (fallback directories):
15607 - Stop failing when a relay has no uptime data in
15608 updateFallbackDirs.py. Fixes bug 20945; bugfix on 0.2.8.1-alpha.
15609 - Avoid checking fallback candidates' DirPorts if they are down in
15610 OnionOO. When a relay operator has multiple relays, this
15611 prioritizes relays that are up over relays that are down. Fixes
15612 bug 20926; bugfix on 0.2.8.3-alpha.
15613 - Stop failing when OUTPUT_COMMENTS is True in updateFallbackDirs.py.
15614 Fixes bug 20877; bugfix on 0.2.8.3-alpha.
15616 o Minor bugfixes (guards, bootstrapping):
15617 - When connecting to a directory guard during bootstrap, do not mark
15618 the guard as successful until we receive a good-looking directory
15619 response from it. Fixes bug 20974; bugfix on 0.3.0.1-alpha.
15621 o Minor bugfixes (onion services):
15622 - Fix the config reload pruning of old vs new services so it
15623 actually works when both ephemeral and non-ephemeral services are
15624 configured. Fixes bug 21054; bugfix on 0.3.0.1-alpha.
15625 - Allow the number of introduction points to be as low as 0, rather
15626 than as low as 3. Fixes bug 21033; bugfix on 0.2.7.2-alpha.
15628 o Minor bugfixes (IPv6):
15629 - Make IPv6-using clients try harder to find an IPv6 directory
15630 server. Fixes bug 20999; bugfix on 0.2.8.2-alpha.
15631 - When IPv6 addresses have not been downloaded yet (microdesc
15632 consensus documents don't list relay IPv6 addresses), use hard-
15633 coded addresses for authorities, fallbacks, and configured
15634 bridges. Now IPv6-only clients can use microdescriptors. Fixes bug
15635 20996; bugfix on b167e82 from 19608 in 0.2.8.5-alpha.
15637 o Minor bugfixes (memory leaks):
15638 - Fix a memory leak when configuring hidden services. Fixes bug
15639 20987; bugfix on 0.3.0.1-alpha.
15641 o Minor bugfixes (portability, also in 0.2.9.9):
15642 - Avoid crashing when Tor is built using headers that contain
15643 CLOCK_MONOTONIC_COARSE, but then tries to run on an older kernel
15644 without CLOCK_MONOTONIC_COARSE. Fixes bug 21035; bugfix
15646 - Fix Libevent detection on platforms without Libevent 1 headers
15647 installed. Fixes bug 21051; bugfix on 0.2.9.1-alpha.
15649 o Minor bugfixes (relay):
15650 - Honor DataDirectoryGroupReadable when tor is a relay. Previously,
15651 initializing the keys would reset the DataDirectory to 0700
15652 instead of 0750 even if DataDirectoryGroupReadable was set to 1.
15653 Fixes bug 19953; bugfix on 0.0.2pre16. Patch by "redfish".
15655 o Minor bugfixes (testing):
15656 - Remove undefined behavior from the backtrace generator by removing
15657 its signal handler. Fixes bug 21026; bugfix on 0.2.5.2-alpha.
15659 o Minor bugfixes (unit tests):
15660 - Allow the unit tests to pass even when DNS lookups of bogus
15661 addresses do not fail as expected. Fixes bug 20862 and 20863;
15662 bugfix on unit tests introduced in 0.2.8.1-alpha
15663 through 0.2.9.4-alpha.
15665 o Code simplification and refactoring:
15666 - Refactor code to manipulate global_origin_circuit_list into
15667 separate functions. Closes ticket 20921.
15669 o Documentation (formatting):
15670 - Clean up formatting of tor.1 man page and HTML doc, where <pre>
15671 blocks were incorrectly appearing. Closes ticket 20885.
15673 o Documentation (man page):
15674 - Clarify many options in tor.1 and add some min/max values for
15675 HiddenService options. Closes ticket 21058.
15678 Changes in version 0.2.9.9 - 2017-01-23
15679 Tor 0.2.9.9 fixes a denial-of-service bug where an attacker could
15680 cause relays and clients to crash, even if they were not built with
15681 the --enable-expensive-hardening option. This bug affects all 0.2.9.x
15682 versions, and also affects 0.3.0.1-alpha: all relays running an affected
15683 version should upgrade.
15685 This release also resolves a client-side onion service reachability
15686 bug, and resolves a pair of small portability issues.
15688 o Major bugfixes (security):
15689 - Downgrade the "-ftrapv" option from "always on" to "only on when
15690 --enable-expensive-hardening is provided." This hardening option,
15691 like others, can turn survivable bugs into crashes -- and having
15692 it on by default made a (relatively harmless) integer overflow bug
15693 into a denial-of-service bug. Fixes bug 21278 (TROVE-2017-001);
15694 bugfix on 0.2.9.1-alpha.
15696 o Major bugfixes (client, onion service):
15697 - Fix a client-side onion service reachability bug, where multiple
15698 socks requests to an onion service (or a single slow request)
15699 could cause us to mistakenly mark some of the service's
15700 introduction points as failed, and we cache that failure so
15701 eventually we run out and can't reach the service. Also resolves a
15702 mysterious "Remote server sent bogus reason code 65021" log
15703 warning. The bug was introduced in ticket 17218, where we tried to
15704 remember the circuit end reason as a uint16_t, which mangled
15705 negative values. Partially fixes bug 21056 and fixes bug 20307;
15706 bugfix on 0.2.8.1-alpha.
15708 o Minor features (geoip):
15709 - Update geoip and geoip6 to the January 4 2017 Maxmind GeoLite2
15712 o Minor bugfixes (portability):
15713 - Avoid crashing when Tor is built using headers that contain
15714 CLOCK_MONOTONIC_COARSE, but then tries to run on an older kernel
15715 without CLOCK_MONOTONIC_COARSE. Fixes bug 21035; bugfix
15717 - Fix Libevent detection on platforms without Libevent 1 headers
15718 installed. Fixes bug 21051; bugfix on 0.2.9.1-alpha.
15721 Changes in version 0.3.0.1-alpha - 2016-12-19
15722 Tor 0.3.0.1-alpha is the first alpha release in the 0.3.0 development
15723 series. It strengthens Tor's link and circuit handshakes by
15724 identifying relays by their Ed25519 keys, improves the algorithm that
15725 clients use to choose and maintain their list of guards, and includes
15726 additional backend support for the next-generation hidden service
15727 design. It also contains numerous other small features and
15728 improvements to security, correctness, and performance.
15730 Below are the changes since 0.2.9.8.
15732 o Major features (guard selection algorithm):
15733 - Tor's guard selection algorithm has been redesigned from the
15734 ground up, to better support unreliable networks and restrictive
15735 sets of entry nodes, and to better resist guard-capture attacks by
15736 hostile local networks. Implements proposal 271; closes
15739 o Major features (next-generation hidden services):
15740 - Relays can now handle v3 ESTABLISH_INTRO cells as specified by
15741 prop224 aka "Next Generation Hidden Services". Service and clients
15742 don't use this functionality yet. Closes ticket 19043. Based on
15743 initial code by Alec Heifetz.
15744 - Relays now support the HSDir version 3 protocol, so that they can
15745 can store and serve v3 descriptors. This is part of the next-
15746 generation onion service work detailed in proposal 224. Closes
15749 o Major features (protocol, ed25519 identity keys):
15750 - Relays now use Ed25519 to prove their Ed25519 identities and to
15751 one another, and to clients. This algorithm is faster and more
15752 secure than the RSA-based handshake we've been doing until now.
15753 Implements the second big part of proposal 220; Closes
15755 - Clients now support including Ed25519 identity keys in the EXTEND2
15756 cells they generate. By default, this is controlled by a consensus
15757 parameter, currently disabled. You can turn this feature on for
15758 testing by setting ExtendByEd25519ID in your configuration. This
15759 might make your traffic appear different than the traffic
15760 generated by other users, however. Implements part of ticket
15761 15056; part of proposal 220.
15762 - Relays now understand requests to extend to other relays by their
15763 Ed25519 identity keys. When an Ed25519 identity key is included in
15764 an EXTEND2 cell, the relay will only extend the circuit if the
15765 other relay can prove ownership of that identity. Implements part
15766 of ticket 15056; part of proposal 220.
15768 o Major bugfixes (scheduler):
15769 - Actually compare circuit policies in ewma_cmp_cmux(). This bug
15770 caused the channel scheduler to behave more or less randomly,
15771 rather than preferring channels with higher-priority circuits.
15772 Fixes bug 20459; bugfix on 0.2.6.2-alpha.
15774 o Minor features (controller):
15775 - When HSFETCH arguments cannot be parsed, say "Invalid argument"
15776 rather than "unrecognized." Closes ticket 20389; patch from
15779 o Minor features (diagnostic, directory client):
15780 - Warn when we find an unexpected inconsistency in directory
15781 download status objects. Prevents some negative consequences of
15784 o Minor features (directory authority):
15785 - Add a new authority-only AuthDirTestEd25519LinkKeys option (on by
15786 default) to control whether authorities should try to probe relays
15787 by their Ed25519 link keys. This option will go away in a few
15788 releases--unless we encounter major trouble in our ed25519 link
15789 protocol rollout, in which case it will serve as a safety option.
15791 o Minor features (directory cache):
15792 - Relays and bridges will now refuse to serve the consensus they
15793 have if they know it is too old for a client to use. Closes
15796 o Minor features (ed25519 link handshake):
15797 - Advertise support for the ed25519 link handshake using the
15798 subprotocol-versions mechanism, so that clients can tell which
15799 relays can identity themselves by Ed25519 ID. Closes ticket 20552.
15801 o Minor features (fingerprinting resistance, authentication):
15802 - Extend the length of RSA keys used for TLS link authentication to
15803 2048 bits. (These weren't used for forward secrecy; for forward
15804 secrecy, we used P256.) Closes ticket 13752.
15806 o Minor features (infrastructure):
15807 - Implement smartlist_add_strdup() function. Replaces the use of
15808 smartlist_add(sl, tor_strdup(str)). Closes ticket 20048.
15810 o Minor bugfixes (client):
15811 - When clients that use bridges start up with a cached consensus on
15812 disk, they were ignoring it and downloading a new one. Now they
15813 use the cached one. Fixes bug 20269; bugfix on 0.2.3.12-alpha.
15815 o Minor bugfixes (configuration):
15816 - Accept non-space whitespace characters after the severity level in
15817 the `Log` option. Fixes bug 19965; bugfix on 0.2.1.1-alpha.
15818 - Support "TByte" and "TBytes" units in options given in bytes.
15819 "TB", "terabyte(s)", "TBit(s)" and "terabit(s)" were already
15820 supported. Fixes bug 20622; bugfix on 0.2.0.14-alpha.
15822 o Minor bugfixes (consensus weight):
15823 - Add new consensus method that initializes bw weights to 1 instead
15824 of 0. This prevents a zero weight from making it all the way to
15825 the end (happens in small testing networks) and causing an error.
15826 Fixes bug 14881; bugfix on 0.2.2.17-alpha.
15828 o Minor bugfixes (descriptors):
15829 - Correctly recognise downloaded full descriptors as valid, even
15830 when using microdescriptors as circuits. This affects clients with
15831 FetchUselessDescriptors set, and may affect directory authorities.
15832 Fixes bug 20839; bugfix on 0.2.3.2-alpha.
15834 o Minor bugfixes (directory system):
15835 - Download all consensus flavors, descriptors, and authority
15836 certificates when FetchUselessDescriptors is set, regardless of
15837 whether tor is a directory cache or not. Fixes bug 20667; bugfix
15838 on all recent tor versions.
15839 - Bridges and relays now use microdescriptors (like clients do)
15840 rather than old-style router descriptors. Now bridges will blend
15841 in with clients in terms of the circuits they build. Fixes bug
15842 6769; bugfix on 0.2.3.2-alpha.
15844 o Minor bugfixes (ed25519 certificates):
15845 - Correctly interpret ed25519 certificates that would expire some
15846 time after 19 Jan 2038. Fixes bug 20027; bugfix on 0.2.7.2-alpha.
15848 o Minor bugfixes (hidden services):
15849 - Stop ignoring misconfigured hidden services. Instead, refuse to
15850 start tor until the misconfigurations have been corrected. Fixes
15851 bug 20559; bugfix on multiple commits in 0.2.7.1-alpha
15854 o Minor bugfixes (memory leak at exit):
15855 - Fix a small harmless memory leak at exit of the previously unused
15856 RSA->Ed identity cross-certificate. Fixes bug 17779; bugfix
15859 o Minor bugfixes (util):
15860 - When finishing writing a file to disk, if we were about to replace
15861 the file with the temporary file created before and we fail to
15862 replace it, remove the temporary file so it doesn't stay on disk.
15863 Fixes bug 20646; bugfix on 0.2.0.7-alpha. Patch by fk.
15865 o Minor bugfixes (Windows):
15866 - Check for getpagesize before using it to mmap files. This fixes
15867 compilation in some MinGW environments. Fixes bug 20530; bugfix on
15868 0.1.2.1-alpha. Reported by "ice".
15870 o Code simplification and refactoring:
15871 - Abolish all global guard context in entrynodes.c; replace with new
15872 guard_selection_t structure as preparation for proposal 271.
15873 Closes ticket 19858.
15874 - Introduce rend_service_is_ephemeral() that tells if given onion
15875 service is ephemeral. Replace unclear NULL-checkings for service
15876 directory with this function. Closes ticket 20526.
15877 - Extract magic numbers in circuituse.c into defined variables.
15878 - Refactor circuit_is_available_for_use to remove unnecessary check.
15879 - Refactor circuit_predict_and_launch_new for readability and
15880 testability. Closes ticket 18873.
15881 - Refactor large if statement in purpose_needs_anonymity to use
15882 switch statement instead. Closes part of ticket 20077.
15883 - Refactor the hashing API to return negative values for errors, as
15884 is done as throughout the codebase. Closes ticket 20717.
15885 - Remove data structures that were used to index or_connection
15886 objects by their RSA identity digests. These structures are fully
15887 redundant with the similar structures used in the
15888 channel abstraction.
15889 - Remove duplicate code in the channel_write_*cell() functions.
15890 Closes ticket 13827; patch from Pingl.
15891 - Remove redundant behavior of is_sensitive_dir_purpose, refactor to
15892 use only purpose_needs_anonymity. Closes part of ticket 20077.
15893 - The code to generate and parse EXTEND and EXTEND2 cells has been
15894 replaced with code automatically generated by the
15898 - Include the "TBits" unit in Tor's man page. Fixes part of bug
15899 20622; bugfix on 0.2.5.1-alpha.
15900 - Change '1' to 'weight_scale' in consensus bw weights calculation
15901 comments, as that is reality. Closes ticket 20273. Patch
15903 - Correct the value for AuthDirGuardBWGuarantee in the manpage, from
15904 250 KBytes to 2 MBytes. Fixes bug 20435; bugfix
15906 - Stop the man page from incorrectly stating that HiddenServiceDir
15907 must already exist. Fixes 20486.
15908 - Clarify that when ClientRejectInternalAddresses is enabled (which
15909 is the default), multicast DNS hostnames for machines on the local
15910 network (of the form *.local) are also rejected. Closes
15913 o Removed features:
15914 - The AuthDirMaxServersPerAuthAddr option no longer exists: The same
15915 limit for relays running on a single IP applies to authority IP
15916 addresses as well as to non-authority IP addresses. Closes
15918 - The UseDirectoryGuards torrc option no longer exists: all users
15919 that use entry guards will also use directory guards. Related to
15920 proposal 271; implements part of ticket 20831.
15923 - New unit tests for tor_htonll(). Closes ticket 19563. Patch
15924 from "overcaffeinated".
15925 - Perform the coding style checks when running the tests and fail
15926 when coding style violations are found. Closes ticket 5500.
15927 - Add tests for networkstatus_compute_bw_weights_v10.
15928 - Add unit tests circuit_predict_and_launch_new.
15929 - Extract dummy_origin_circuit_new so it can be used by other
15933 Changes in version 0.2.8.12 - 2016-12-19
15934 Tor 0.2.8.12 backports a fix for a medium-severity issue (bug 21018
15935 below) where Tor clients could crash when attempting to visit a
15936 hostile hidden service. Clients are recommended to upgrade as packages
15937 become available for their systems.
15939 It also includes an updated list of fallback directories, backported
15942 Now that the Tor 0.2.9 series is stable, only major bugfixes will be
15943 backported to 0.2.8 in the future.
15945 o Major bugfixes (parsing, security, backported from 0.2.9.8):
15946 - Fix a bug in parsing that could cause clients to read a single
15947 byte past the end of an allocated region. This bug could be used
15948 to cause hardened clients (built with --enable-expensive-hardening)
15949 to crash if they tried to visit a hostile hidden service. Non-
15950 hardened clients are only affected depending on the details of
15951 their platform's memory allocator. Fixes bug 21018; bugfix on
15952 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
15953 2016-12-002 and as CVE-2016-1254.
15955 o Minor features (fallback directory list, backported from 0.2.9.8):
15956 - Replace the 81 remaining fallbacks of the 100 originally
15957 introduced in Tor 0.2.8.3-alpha in March 2016, with a list of 177
15958 fallbacks (123 new, 54 existing, 27 removed) generated in December
15959 2016. Resolves ticket 20170.
15961 o Minor features (geoip, backported from 0.2.9.7-rc):
15962 - Update geoip and geoip6 to the December 7 2016 Maxmind GeoLite2
15966 Changes in version 0.2.9.8 - 2016-12-19
15967 Tor 0.2.9.8 is the first stable release of the Tor 0.2.9 series.
15969 The Tor 0.2.9 series makes mandatory a number of security features
15970 that were formerly optional. It includes support for a new shared-
15971 randomness protocol that will form the basis for next generation
15972 hidden services, includes a single-hop hidden service mode for
15973 optimizing .onion services that don't actually want to be hidden,
15974 tries harder not to overload the directory authorities with excessive
15975 downloads, and supports a better protocol versioning scheme for
15976 improved compatibility with other implementations of the Tor protocol.
15978 And of course, there are numerous other bugfixes and improvements.
15980 This release also includes a fix for a medium-severity issue (bug
15981 21018 below) where Tor clients could crash when attempting to visit a
15982 hostile hidden service. Clients are recommended to upgrade as packages
15983 become available for their systems.
15985 Below are the changes since 0.2.9.7-rc. For a list of all changes
15986 since 0.2.8, see the ReleaseNotes file.
15988 o Major bugfixes (parsing, security):
15989 - Fix a bug in parsing that could cause clients to read a single
15990 byte past the end of an allocated region. This bug could be used
15991 to cause hardened clients (built with --enable-expensive-hardening)
15992 to crash if they tried to visit a hostile hidden service. Non-
15993 hardened clients are only affected depending on the details of
15994 their platform's memory allocator. Fixes bug 21018; bugfix on
15995 0.2.0.8-alpha. Found by using libFuzzer. Also tracked as TROVE-
15996 2016-12-002 and as CVE-2016-1254.
15998 o Minor features (fallback directory list):
15999 - Replace the 81 remaining fallbacks of the 100 originally
16000 introduced in Tor 0.2.8.3-alpha in March 2016, with a list of 177
16001 fallbacks (123 new, 54 existing, 27 removed) generated in December
16002 2016. Resolves ticket 20170.
16005 Changes in version 0.2.9.7-rc - 2016-12-12
16006 Tor 0.2.9.7-rc fixes a few small bugs remaining in Tor 0.2.9.6-rc,
16007 including a few that had prevented tests from passing on
16010 o Minor features (geoip):
16011 - Update geoip and geoip6 to the December 7 2016 Maxmind GeoLite2
16014 o Minor bugfix (build):
16015 - The current Git revision when building from a local repository is
16016 now detected correctly when using git worktrees. Fixes bug 20492;
16017 bugfix on 0.2.3.9-alpha.
16019 o Minor bugfixes (directory authority):
16020 - When computing old Tor protocol line version in protover, we were
16021 looking at 0.2.7.5 twice instead of a specific case for
16022 0.2.9.1-alpha. Fixes bug 20810; bugfix on 0.2.9.4-alpha.
16024 o Minor bugfixes (download scheduling):
16025 - Resolve a "bug" warning when considering a download schedule whose
16026 delay had approached INT_MAX. Fixes 20875; bugfix on 0.2.9.5-alpha.
16028 o Minor bugfixes (logging):
16029 - Downgrade a harmless log message about the
16030 pending_entry_connections list from "warn" to "info". Mitigates
16033 o Minor bugfixes (memory leak):
16034 - Fix a small memory leak when receiving AF_UNIX connections on a
16035 SocksPort. Fixes bug 20716; bugfix on 0.2.6.3-alpha.
16036 - When moving a signed descriptor object from a source to an
16037 existing destination, free the allocated memory inside that
16038 destination object. Fixes bug 20715; bugfix on 0.2.8.3-alpha.
16040 o Minor bugfixes (memory leak, use-after-free, linux seccomp2 sandbox):
16041 - Fix a memory leak and use-after-free error when removing entries
16042 from the sandbox's getaddrinfo() cache. Fixes bug 20710; bugfix on
16043 0.2.5.5-alpha. Patch from "cypherpunks".
16045 o Minor bugfixes (portability):
16046 - Use the correct spelling of MAC_OS_X_VERSION_10_12 on configure.ac
16047 Fixes bug 20935; bugfix on 0.2.9.6-rc.
16049 o Minor bugfixes (unit tests):
16050 - Stop expecting NetBSD unit tests to report success for ipfw. Part
16051 of a fix for bug 19960; bugfix on 0.2.9.5-alpha.
16052 - Fix tolerances in unit tests for monotonic time comparisons
16053 between nanoseconds and microseconds. Previously, we accepted a 10
16054 us difference only, which is not realistic on every platform's
16055 clock_gettime(). Fixes bug 19974; bugfix on 0.2.9.1-alpha.
16056 - Remove a double-free in the single onion service unit test. Stop
16057 ignoring a return value. Make future changes less error-prone.
16058 Fixes bug 20864; bugfix on 0.2.9.6-rc.
16061 Changes in version 0.2.8.11 - 2016-12-08
16062 Tor 0.2.8.11 backports fixes for additional portability issues that
16063 could prevent Tor from building correctly on OSX Sierra, or with
16064 OpenSSL 1.1. Affected users should upgrade; others can safely stay
16067 o Minor bugfixes (portability):
16068 - Avoid compilation errors when building on OSX Sierra. Sierra began
16069 to support the getentropy() and clock_gettime() APIs, but created
16070 a few problems in doing so. Tor 0.2.9 has a more thorough set of
16071 workarounds; in 0.2.8, we are just using the /dev/urandom and mach
16072 monotonic time interfaces. Fixes bug 20865. Bugfix
16075 o Minor bugfixes (portability, backport from 0.2.9.5-alpha):
16076 - Fix compilation with OpenSSL 1.1 and less commonly-used CPU
16077 architectures. Closes ticket 20588.
16080 Changes in version 0.2.8.10 - 2016-12-02
16081 Tor 0.2.8.10 backports a fix for a bug that would sometimes make clients
16082 unusable after they left standby mode. It also backports fixes for
16083 a few portability issues and a small but problematic memory leak.
16085 o Major bugfixes (client reliability, backport from 0.2.9.5-alpha):
16086 - When Tor leaves standby because of a new application request, open
16087 circuits as needed to serve that request. Previously, we would
16088 potentially wait a very long time. Fixes part of bug 19969; bugfix
16091 o Major bugfixes (client performance, backport from 0.2.9.5-alpha):
16092 - Clients now respond to new application stream requests immediately
16093 when they arrive, rather than waiting up to one second before
16094 starting to handle them. Fixes part of bug 19969; bugfix
16097 o Minor bugfixes (portability, backport from 0.2.9.6-rc):
16098 - Work around a bug in the OSX 10.12 SDK that would prevent us from
16099 successfully targeting earlier versions of OSX. Resolves
16102 o Minor bugfixes (portability, backport from 0.2.9.5-alpha):
16103 - Fix implicit conversion warnings under OpenSSL 1.1. Fixes bug
16104 20551; bugfix on 0.2.1.1-alpha.
16106 o Minor bugfixes (relay, backport from 0.2.9.5-alpha):
16107 - Work around a memory leak in OpenSSL 1.1 when encoding public
16108 keys. Fixes bug 20553; bugfix on 0.0.2pre8.
16110 o Minor features (geoip):
16111 - Update geoip and geoip6 to the November 3 2016 Maxmind GeoLite2
16114 Changes in version 0.2.9.6-rc - 2016-12-02
16115 Tor 0.2.9.6-rc fixes a few remaining bugs found in the previous alpha
16116 version. We hope that it will be ready to become stable soon, and we
16117 encourage everyone to test this release. If no showstopper bugs are
16118 found here, the next 0.2.9 release will be stable.
16120 o Major bugfixes (relay, resolver, logging):
16121 - For relays that don't know their own address, avoid attempting a
16122 local hostname resolve for each descriptor we download. This
16123 will cut down on the number of "Success: chose address 'x.x.x.x'"
16124 log lines, and also avoid confusing clock jumps if the resolver
16125 is slow. Fixes bugs 20423 and 20610; bugfix on 0.2.8.1-alpha.
16127 o Minor bugfixes (client, fascistfirewall):
16128 - Avoid spurious warnings when ReachableAddresses or FascistFirewall
16129 is set. Fixes bug 20306; bugfix on 0.2.8.2-alpha.
16131 o Minor bugfixes (hidden services):
16132 - Stop ignoring the anonymity status of saved keys for hidden
16133 services and single onion services when first starting tor.
16134 Instead, refuse to start tor if any hidden service key has been
16135 used in a different hidden service anonymity mode. Fixes bug
16136 20638; bugfix on 17178 in 0.2.9.3-alpha; reported by ahf.
16138 o Minor bugfixes (portability):
16139 - Work around a bug in the OSX 10.12 SDK that would prevent us from
16140 successfully targeting earlier versions of OSX. Resolves
16142 - Run correctly when built on Windows build environments that
16143 require _vcsprintf(). Fixes bug 20560; bugfix on 0.2.2.11-alpha.
16145 o Minor bugfixes (single onion services, Tor2web):
16146 - Stop complaining about long-term one-hop circuits deliberately
16147 created by single onion services and Tor2web. These log messages
16148 are intended to diagnose issue 8387, which relates to circuits
16149 hanging around forever for no reason. Fixes bug 20613; bugfix on
16150 0.2.9.1-alpha. Reported by "pastly".
16152 o Minor bugfixes (unit tests):
16153 - Stop spurious failures in the local interface address discovery
16154 unit tests. Fixes bug 20634; bugfix on 0.2.8.1-alpha; patch by
16158 - Correct the minimum bandwidth value in torrc.sample, and queue a
16159 corresponding change for torrc.minimal. Closes ticket 20085.
16162 Changes in version 0.2.9.5-alpha - 2016-11-08
16163 Tor 0.2.9.5-alpha fixes numerous bugs discovered in the previous alpha
16164 version. We believe one or two probably remain, and we encourage
16165 everyone to test this release.
16167 o Major bugfixes (client performance):
16168 - Clients now respond to new application stream requests immediately
16169 when they arrive, rather than waiting up to one second before
16170 starting to handle them. Fixes part of bug 19969; bugfix
16173 o Major bugfixes (client reliability):
16174 - When Tor leaves standby because of a new application request, open
16175 circuits as needed to serve that request. Previously, we would
16176 potentially wait a very long time. Fixes part of bug 19969; bugfix
16179 o Major bugfixes (download scheduling):
16180 - When using an exponential backoff schedule, do not give up on
16181 downloading just because we have failed a bunch of times. Since
16182 each delay is longer than the last, retrying indefinitely won't
16183 hurt. Fixes bug 20536; bugfix on 0.2.9.1-alpha.
16184 - If a consensus expires while we are waiting for certificates to
16185 download, stop waiting for certificates.
16186 - If we stop waiting for certificates less than a minute after we
16187 started downloading them, do not consider the certificate download
16188 failure a separate failure. Fixes bug 20533; bugfix
16190 - Remove the maximum delay on exponential-backoff scheduling. Since
16191 we now allow an infinite number of failures (see ticket 20536), we
16192 must now allow the time to grow longer on each failure. Fixes part
16193 of bug 20534; bugfix on 0.2.9.1-alpha.
16194 - Make our initial download delays closer to those from 0.2.8. Fixes
16195 another part of bug 20534; bugfix on 0.2.9.1-alpha.
16196 - When determining when to download a directory object, handle times
16197 after 2038 if the operating system supports them. (Someday this
16198 will be important!) Fixes bug 20587; bugfix on 0.2.8.1-alpha.
16199 - When using exponential backoff in test networks, use a lower
16200 exponent, so the delays do not vary as much. This helps test
16201 networks bootstrap consistently. Fixes bug 20597; bugfix on 20499.
16203 o Minor features (geoip):
16204 - Update geoip and geoip6 to the November 3 2016 Maxmind GeoLite2
16207 o Minor bugfixes (client directory scheduling):
16208 - Treat "relay too busy to answer request" as a failed request and a
16209 reason to back off on our retry frequency. This is safe now that
16210 exponential backoffs retry indefinitely, and avoids a bug where we
16211 would reset our download schedule erroneously. Fixes bug 20593;
16212 bugfix on 0.2.9.1-alpha.
16214 o Minor bugfixes (client, logging):
16215 - Remove a BUG warning in circuit_pick_extend_handshake(). Instead,
16216 assume all nodes support EXTEND2. Use ntor whenever a key is
16217 available. Fixes bug 20472; bugfix on 0.2.9.3-alpha.
16218 - On DNSPort, stop logging a BUG warning on a failed hostname
16219 lookup. Fixes bug 19869; bugfix on 0.2.9.1-alpha.
16221 o Minor bugfixes (hidden services):
16222 - When configuring hidden services, check every hidden service
16223 directory's permissions. Previously, we only checked the last
16224 hidden service. Fixes bug 20529; bugfix the work to fix 13942
16227 o Minor bugfixes (portability):
16228 - Fix compilation with OpenSSL 1.1 and less commonly-used CPU
16229 architectures. Closes ticket 20588.
16230 - Use ECDHE ciphers instead of ECDH in tortls tests. LibreSSL has
16231 removed the ECDH ciphers which caused the tests to fail on
16232 platforms which use it. Fixes bug 20460; bugfix on 0.2.8.1-alpha.
16233 - Fix implicit conversion warnings under OpenSSL 1.1. Fixes bug
16234 20551; bugfix on 0.2.1.1-alpha.
16236 o Minor bugfixes (relay bootstrap):
16237 - Ensure relays don't make multiple connections during bootstrap.
16238 Fixes bug 20591; bugfix on 0.2.8.1-alpha.
16240 o Minor bugfixes (relay):
16241 - Work around a memory leak in OpenSSL 1.1 when encoding public
16242 keys. Fixes bug 20553; bugfix on 0.0.2pre8.
16243 - Avoid a small memory leak when informing worker threads about
16244 rotated onion keys. Fixes bug 20401; bugfix on 0.2.6.3-alpha.
16245 - Do not try to parallelize workers more than 16x without the user
16246 explicitly configuring us to do so, even if we do detect more than
16247 16 CPU cores. Fixes bug 19968; bugfix on 0.2.3.1-alpha.
16249 o Minor bugfixes (single onion services):
16250 - Start correctly when creating a single onion service in a
16251 directory that did not previously exist. Fixes bug 20484; bugfix
16254 o Minor bugfixes (testing):
16255 - Avoid a unit test failure on systems with over 16 detectable CPU
16256 cores. Fixes bug 19968; bugfix on 0.2.3.1-alpha.
16259 - Clarify that setting HiddenServiceNonAnonymousMode requires you to
16260 also set "SOCKSPort 0". Fixes bug 20487; bugfix on 0.2.9.3-alpha.
16261 - Module-level documentation for several more modules. Closes
16262 tickets 19287 and 19290.
16265 Changes in version 0.2.8.9 - 2016-10-17
16266 Tor 0.2.8.9 backports a fix for a security hole in previous versions
16267 of Tor that would allow a remote attacker to crash a Tor client,
16268 hidden service, relay, or authority. All Tor users should upgrade to
16269 this version, or to 0.2.9.4-alpha. Patches will be released for older
16272 o Major features (security fixes, also in 0.2.9.4-alpha):
16273 - Prevent a class of security bugs caused by treating the contents
16274 of a buffer chunk as if they were a NUL-terminated string. At
16275 least one such bug seems to be present in all currently used
16276 versions of Tor, and would allow an attacker to remotely crash
16277 most Tor instances, especially those compiled with extra compiler
16278 hardening. With this defense in place, such bugs can't crash Tor,
16279 though we should still fix them as they occur. Closes ticket
16280 20384 (TROVE-2016-10-001).
16282 o Minor features (geoip):
16283 - Update geoip and geoip6 to the October 4 2016 Maxmind GeoLite2
16287 Changes in version 0.2.9.4-alpha - 2016-10-17
16288 Tor 0.2.9.4-alpha fixes a security hole in previous versions of Tor
16289 that would allow a remote attacker to crash a Tor client, hidden
16290 service, relay, or authority. All Tor users should upgrade to this
16291 version, or to 0.2.8.9. Patches will be released for older versions
16294 Tor 0.2.9.4-alpha also adds numerous small features and fix-ups to
16295 previous versions of Tor, including the implementation of a feature to
16296 future- proof the Tor ecosystem against protocol changes, some bug
16297 fixes necessary for Tor Browser to use unix domain sockets correctly,
16298 and several portability improvements. We anticipate that this will be
16299 the last alpha in the Tor 0.2.9 series, and that the next release will
16300 be a release candidate.
16302 o Major features (security fixes):
16303 - Prevent a class of security bugs caused by treating the contents
16304 of a buffer chunk as if they were a NUL-terminated string. At
16305 least one such bug seems to be present in all currently used
16306 versions of Tor, and would allow an attacker to remotely crash
16307 most Tor instances, especially those compiled with extra compiler
16308 hardening. With this defense in place, such bugs can't crash Tor,
16309 though we should still fix them as they occur. Closes ticket
16310 20384 (TROVE-2016-10-001).
16312 o Major features (subprotocol versions):
16313 - Tor directory authorities now vote on a set of recommended
16314 subprotocol versions, and on a set of required subprotocol
16315 versions. Clients and relays that lack support for a _required_
16316 subprotocol version will not start; those that lack support for a
16317 _recommended_ subprotocol version will warn the user to upgrade.
16318 Closes ticket 19958; implements part of proposal 264.
16319 - Tor now uses "subprotocol versions" to indicate compatibility.
16320 Previously, versions of Tor looked at the declared Tor version of
16321 a relay to tell whether they could use a given feature. Now, they
16322 should be able to rely on its declared subprotocol versions. This
16323 change allows compatible implementations of the Tor protocol(s) to
16324 exist without pretending to be 100% bug-compatible with particular
16325 releases of Tor itself. Closes ticket 19958; implements part of
16328 o Minor feature (fallback directories):
16329 - Remove broken fallbacks from the hard-coded fallback directory
16330 list. Closes ticket 20190; patch by teor.
16332 o Minor features (client, directory):
16333 - Since authorities now omit all routers that lack the Running and
16334 Valid flags, we assume that any relay listed in the consensus must
16335 have those flags. Closes ticket 20001; implements part of
16338 o Minor features (compilation, portability):
16339 - Compile correctly on MacOS 10.12 (aka "Sierra"). Closes
16342 o Minor features (development tools, etags):
16343 - Teach the "make tags" Makefile target how to correctly find
16344 "MOCK_IMPL" function definitions. Patch from nherring; closes
16347 o Minor features (geoip):
16348 - Update geoip and geoip6 to the October 4 2016 Maxmind GeoLite2
16351 o Minor features (unix domain sockets):
16352 - When configuring a unix domain socket for a SocksPort,
16353 ControlPort, or Hidden service, you can now wrap the address in
16354 quotes, using C-style escapes inside the quotes. This allows unix
16355 domain socket paths to contain spaces.
16357 o Minor features (virtual addresses):
16358 - Increase the maximum number of bits for the IPv6 virtual network
16359 prefix from 16 to 104. In this way, the condition for address
16360 allocation is less restrictive. Closes ticket 20151; feature
16363 o Minor bugfixes (address discovery):
16364 - Stop reordering IP addresses returned by the OS. This makes it
16365 more likely that Tor will guess the same relay IP address every
16366 time. Fixes issue 20163; bugfix on 0.2.7.1-alpha, ticket 17027.
16367 Reported by René Mayrhofer, patch by "cypherpunks".
16369 o Minor bugfixes (client, unix domain sockets):
16370 - Disable IsolateClientAddr when using AF_UNIX backed SocksPorts as
16371 the client address is meaningless. Fixes bug 20261; bugfix
16374 o Minor bugfixes (compilation, OpenBSD):
16375 - Detect Libevent2 functions correctly on systems that provide
16376 libevent2, but where libevent1 is linked with -levent. Fixes bug
16377 19904; bugfix on 0.2.2.24-alpha. Patch from Rubiate.
16379 o Minor bugfixes (configuration):
16380 - When parsing quoted configuration values from the torrc file,
16381 handle windows line endings correctly. Fixes bug 19167; bugfix on
16382 0.2.0.16-alpha. Patch from "Pingl".
16384 o Minor bugfixes (getpass):
16385 - Defensively fix a non-triggerable heap corruption at do_getpass()
16386 to protect ourselves from mistakes in the future. Fixes bug
16387 19223; bugfix on 0.2.7.3-rc. Bug found by Guido Vranken, patch
16390 o Minor bugfixes (hidden service):
16391 - Allow hidden services to run on IPv6 addresses even when the
16392 IPv6Exit option is not set. Fixes bug 18357; bugfix
16396 - Add module-level internal documentation for 36 C files that
16397 previously didn't have a high-level overview. Closes ticket #20385.
16399 o Required libraries:
16400 - When building with OpenSSL, Tor now requires version 1.0.1 or
16401 later. OpenSSL 1.0.0 and earlier are no longer supported by the
16402 OpenSSL team, and should not be used. Closes ticket 20303.
16405 Changes in version 0.2.9.3-alpha - 2016-09-23
16406 Tor 0.2.9.3-alpha adds improved support for entities that want to make
16407 high-performance services available through the Tor .onion mechanism
16408 without themselves receiving anonymity as they host those services. It
16409 also tries harder to ensure that all steps on a circuit are using the
16410 strongest crypto possible, strengthens some TLS properties, and
16411 resolves several bugs -- including a pair of crash bugs from the 0.2.8
16412 series. Anybody running an earlier version of 0.2.9.x should upgrade.
16414 o Major bugfixes (crash, also in 0.2.8.8):
16415 - Fix a complicated crash bug that could affect Tor clients
16416 configured to use bridges when replacing a networkstatus consensus
16417 in which one of their bridges was mentioned. OpenBSD users saw
16418 more crashes here, but all platforms were potentially affected.
16419 Fixes bug 20103; bugfix on 0.2.8.2-alpha.
16421 o Major bugfixes (relay, OOM handler, also in 0.2.8.8):
16422 - Fix a timing-dependent assertion failure that could occur when we
16423 tried to flush from a circuit after having freed its cells because
16424 of an out-of-memory condition. Fixes bug 20203; bugfix on
16425 0.2.8.1-alpha. Thanks to "cypherpunks" for help diagnosing
16428 o Major features (circuit building, security):
16429 - Authorities, relays and clients now require ntor keys in all
16430 descriptors, for all hops (except for rare hidden service protocol
16431 cases), for all circuits, and for all other roles. Part of
16433 - Tor authorities, relays, and clients only use ntor, except for
16434 rare cases in the hidden service protocol. Part of ticket 19163.
16436 o Major features (single-hop "hidden" services):
16437 - Add experimental HiddenServiceSingleHopMode and
16438 HiddenServiceNonAnonymousMode options. When both are set to 1,
16439 every hidden service on a Tor instance becomes a non-anonymous
16440 Single Onion Service. Single Onions make one-hop (direct)
16441 connections to their introduction and rendezvous points. One-hop
16442 circuits make Single Onion servers easily locatable, but clients
16443 remain location-anonymous. This is compatible with the existing
16444 hidden service implementation, and works on the current tor
16445 network without any changes to older relays or clients. Implements
16446 proposal 260, completes ticket 17178. Patch by teor and asn.
16448 o Major features (resource management):
16449 - Tor can now notice it is about to run out of sockets, and
16450 preemptively close connections of lower priority. (This feature is
16451 off by default for now, since the current prioritizing method is
16452 yet not mature enough. You can enable it by setting
16453 "DisableOOSCheck 0", but watch out: it might close some sockets
16454 you would rather have it keep.) Closes ticket 18640.
16456 o Major bugfixes (circuit building):
16457 - Hidden service client-to-intro-point and service-to-rendezvous-
16458 point circuits use the TAP key supplied by the protocol, to avoid
16459 epistemic attacks. Fixes bug 19163; bugfix on 0.2.4.18-rc.
16461 o Major bugfixes (compilation, OpenBSD):
16462 - Fix a Libevent-detection bug in our autoconf script that would
16463 prevent Tor from linking successfully on OpenBSD. Patch from
16464 rubiate. Fixes bug 19902; bugfix on 0.2.9.1-alpha.
16466 o Major bugfixes (hidden services):
16467 - Clients now require hidden services to include the TAP keys for
16468 their intro points in the hidden service descriptor. This prevents
16469 an inadvertent upgrade to ntor, which a malicious hidden service
16470 could use to distinguish clients by consensus version. Fixes bug
16471 20012; bugfix on 0.2.4.8-alpha. Patch by teor.
16473 o Minor features (security, TLS):
16474 - Servers no longer support clients that without AES ciphersuites.
16475 (3DES is no longer considered an acceptable cipher.) We believe
16476 that no such Tor clients currently exist, since Tor has required
16477 OpenSSL 0.9.7 or later since 2009. Closes ticket 19998.
16479 o Minor feature (fallback directories):
16480 - Remove 8 fallbacks that are no longer suitable, leaving 81 of the
16481 100 fallbacks originally introduced in Tor 0.2.8.2-alpha in March
16482 2016. Closes ticket 20190; patch by teor.
16484 o Minor features (geoip, also in 0.2.8.8):
16485 - Update geoip and geoip6 to the September 6 2016 Maxmind GeoLite2
16488 o Minor feature (port flags):
16489 - Add new flags to the *Port options to finer control over which
16490 requests are allowed. The flags are NoDNSRequest, NoOnionTraffic,
16491 and the synthetic flag OnionTrafficOnly, which is equivalent to
16492 NoDNSRequest, NoIPv4Traffic, and NoIPv6Traffic. Closes enhancement
16493 18693; patch by "teor".
16495 o Minor features (directory authority):
16496 - After voting, if the authorities decide that a relay is not
16497 "Valid", they no longer include it in the consensus at all. Closes
16498 ticket 20002; implements part of proposal 272.
16500 o Minor features (testing):
16501 - Disable memory protections on OpenBSD when performing our unit
16502 tests for memwipe(). The test deliberately invokes undefined
16503 behavior, and the OpenBSD protections interfere with this. Patch
16504 from "rubiate". Closes ticket 20066.
16506 o Minor features (testing, ipv6):
16507 - Add the single-onion and single-onion-ipv6 chutney targets to
16508 "make test-network-all". This requires a recent chutney version
16509 with the single onion network flavours (git c72a652 or later).
16510 Closes ticket 20072; patch by teor.
16511 - Add the hs-ipv6 chutney target to make test-network-all's IPv6
16512 tests. Remove bridges+hs, as it's somewhat redundant. This
16513 requires a recent chutney version that supports IPv6 clients,
16514 relays, and authorities. Closes ticket 20069; patch by teor.
16516 o Minor features (Tor2web):
16517 - Make Tor2web clients respect ReachableAddresses. This feature was
16518 inadvertently enabled in 0.2.8.6, then removed by bugfix 19973 on
16519 0.2.8.7. Implements feature 20034. Patch by teor.
16521 o Minor features (unit tests):
16522 - We've done significant work to make the unit tests run faster.
16523 - Our link-handshake unit tests now check that when invalid
16524 handshakes fail, they fail with the error messages we expected.
16525 - Our unit testing code that captures log messages no longer
16526 prevents them from being written out if the user asked for them
16527 (by passing --debug or --info or or --notice --warn to the "test"
16528 binary). This change prevents us from missing unexpected log
16529 messages simply because we were looking for others. Related to
16531 - The unit tests now log all warning messages with the "BUG" flag.
16532 Previously, they only logged errors by default. This change will
16533 help us make our testing code more correct, and make sure that we
16534 only hit this code when we mean to. In the meantime, however,
16535 there will be more warnings in the unit test logs than before.
16536 This is preparatory work for ticket 19999.
16537 - The unit tests now treat any failure of a "tor_assert_nonfatal()"
16538 assertion as a test failure.
16540 o Minor bug fixes (circuits):
16541 - Use the CircuitBuildTimeout option whenever
16542 LearnCircuitBuildTimeout is disabled. Previously, we would respect
16543 the option when a user disabled it, but not when it was disabled
16544 because some other option was set. Fixes bug 20073; bugfix on
16545 0.2.4.12-alpha. Patch by teor.
16547 o Minor bugfixes (allocation):
16548 - Change how we allocate memory for large chunks on buffers, to
16549 avoid a (currently impossible) integer overflow, and to waste less
16550 space when allocating unusually large chunks. Fixes bug 20081;
16551 bugfix on 0.2.0.16-alpha. Issue identified by Guido Vranken.
16552 - Always include orconfig.h before including any other C headers.
16553 Sometimes, it includes macros that affect the behavior of the
16554 standard headers. Fixes bug 19767; bugfix on 0.2.9.1-alpha (the
16555 first version to use AC_USE_SYSTEM_EXTENSIONS).
16556 - Fix a syntax error in the IF_BUG_ONCE__() macro in non-GCC-
16557 compatible compilers. Fixes bug 20141; bugfix on 0.2.9.1-alpha.
16558 Patch from Gisle Vanem.
16559 - Stop trying to build with Clang 4.0's -Wthread-safety warnings.
16560 They apparently require a set of annotations that we aren't
16561 currently using, and they create false positives in our pthreads
16562 wrappers. Fixes bug 20110; bugfix on 0.2.9.1-alpha.
16564 o Minor bugfixes (directory authority):
16565 - Die with a more useful error when the operator forgets to place
16566 the authority_signing_key file into the keys directory. This
16567 avoids an uninformative assert & traceback about having an invalid
16568 key. Fixes bug 20065; bugfix on 0.2.0.1-alpha.
16569 - When allowing private addresses, mark Exits that only exit to
16570 private locations as such. Fixes bug 20064; bugfix
16573 o Minor bugfixes (documentation):
16574 - Document the default PathsNeededToBuildCircuits value that's used
16575 by clients when the directory authorities don't set
16576 min_paths_for_circs_pct. Fixes bug 20117; bugfix on 02c320916e02
16577 in 0.2.4.10-alpha. Patch by teor, reported by Jesse V.
16578 - Fix manual for the User option: it takes a username, not a UID.
16579 Fixes bug 19122; bugfix on 0.0.2pre16 (the first version to have
16582 o Minor bugfixes (hidden services):
16583 - Stop logging intro point details to the client log on certain
16584 error conditions. Fixed as part of bug 20012; bugfix on
16585 0.2.4.8-alpha. Patch by teor.
16587 o Minor bugfixes (IPv6, testing):
16588 - Check for IPv6 correctly on Linux when running test networks.
16589 Fixes bug 19905; bugfix on 0.2.7.3-rc; patch by teor.
16591 o Minor bugfixes (Linux seccomp2 sandbox):
16592 - Add permission to run the sched_yield() and sigaltstack() system
16593 calls, in order to support versions of Tor compiled with asan or
16594 ubsan code that use these calls. Now "sandbox 1" and
16595 "--enable-expensive-hardening" should be compatible on more
16596 systems. Fixes bug 20063; bugfix on 0.2.5.1-alpha.
16598 o Minor bugfixes (logging):
16599 - When logging a message from the BUG() macro, be explicit about
16600 what we were asserting. Previously we were confusing what we were
16601 asserting with what the bug was. Fixes bug 20093; bugfix
16603 - When we are unable to remove the bw_accounting file, do not warn
16604 if the reason we couldn't remove it was that it didn't exist.
16605 Fixes bug 19964; bugfix on 0.2.5.4-alpha. Patch from 'pastly'.
16607 o Minor bugfixes (option parsing):
16608 - Count unix sockets when counting client listeners (SOCKS, Trans,
16609 NATD, and DNS). This has no user-visible behaviour changes: these
16610 options are set once, and never read. Required for correct
16611 behaviour in ticket 17178. Fixes bug 19677; bugfix on
16612 0.2.6.3-alpha. Patch by teor.
16614 o Minor bugfixes (options):
16615 - Check the consistency of UseEntryGuards and EntryNodes more
16616 reliably. Fixes bug 20074; bugfix on 0.2.4.12-alpha. Patch
16618 - Stop changing the configured value of UseEntryGuards on
16619 authorities and Tor2web clients. Fixes bug 20074; bugfix on
16620 commits 51fc6799 in 0.1.1.16-rc and acda1735 in 0.2.4.3-alpha.
16623 o Minor bugfixes (Tor2web):
16624 - Prevent Tor2web clients running hidden services, these services
16625 are not anonymous due to the one-hop client paths. Fixes bug
16626 19678. Patch by teor.
16628 o Minor bugfixes (unit tests):
16629 - Fix a shared-random unit test that was failing on big endian
16630 architectures due to internal representation of a integer copied
16631 to a buffer. The test is changed to take a full 32 bytes of data
16632 and use the output of a python script that make the COMMIT and
16633 REVEAL calculation according to the spec. Fixes bug 19977; bugfix
16635 - The tor_tls_server_info_callback unit test no longer crashes when
16636 debug-level logging is turned on. Fixes bug 20041; bugfix
16640 Changes in version 0.2.8.8 - 2016-09-23
16641 Tor 0.2.8.8 fixes two crash bugs present in previous versions of the
16642 0.2.8.x series. Relays running 0.2.8.x should upgrade, as should users
16643 who select public relays as their bridges.
16645 o Major bugfixes (crash):
16646 - Fix a complicated crash bug that could affect Tor clients
16647 configured to use bridges when replacing a networkstatus consensus
16648 in which one of their bridges was mentioned. OpenBSD users saw
16649 more crashes here, but all platforms were potentially affected.
16650 Fixes bug 20103; bugfix on 0.2.8.2-alpha.
16652 o Major bugfixes (relay, OOM handler):
16653 - Fix a timing-dependent assertion failure that could occur when we
16654 tried to flush from a circuit after having freed its cells because
16655 of an out-of-memory condition. Fixes bug 20203; bugfix on
16656 0.2.8.1-alpha. Thanks to "cypherpunks" for help diagnosing
16659 o Minor feature (fallback directories):
16660 - Remove 8 fallbacks that are no longer suitable, leaving 81 of the
16661 100 fallbacks originally introduced in Tor 0.2.8.2-alpha in March
16662 2016. Closes ticket 20190; patch by teor.
16664 o Minor features (geoip):
16665 - Update geoip and geoip6 to the September 6 2016 Maxmind GeoLite2
16669 Changes in version 0.2.9.2-alpha - 2016-08-24
16670 Tor 0.2.9.2-alpha continues development of the 0.2.9 series with
16671 several new features and bugfixes. It also includes an important
16672 authority update and an important bugfix from 0.2.8.7. Everyone who
16673 sets the ReachableAddresses option, and all bridges, are strongly
16674 encouraged to upgrade to 0.2.8.7, or to 0.2.9.2-alpha.
16676 o Directory authority changes (also in 0.2.8.7):
16677 - The "Tonga" bridge authority has been retired; the new bridge
16678 authority is "Bifroest". Closes tickets 19728 and 19690.
16680 o Major bugfixes (client, security, also in 0.2.8.7):
16681 - Only use the ReachableAddresses option to restrict the first hop
16682 in a path. In earlier versions of 0.2.8.x, it would apply to
16683 every hop in the path, with a possible degradation in anonymity
16684 for anyone using an uncommon ReachableAddress setting. Fixes bug
16685 19973; bugfix on 0.2.8.2-alpha.
16687 o Major features (user interface):
16688 - Tor now supports the ability to declare options deprecated, so
16689 that we can recommend that people stop using them. Previously,
16690 this was done in an ad-hoc way. Closes ticket 19820.
16692 o Major bugfixes (directory downloads):
16693 - Avoid resetting download status for consensuses hourly, since we
16694 already have another, smarter retry mechanism. Fixes bug 8625;
16695 bugfix on 0.2.0.9-alpha.
16697 o Minor features (config):
16698 - Warn users when descriptor and port addresses are inconsistent.
16699 Mitigates bug 13953; patch by teor.
16701 o Minor features (geoip):
16702 - Update geoip and geoip6 to the August 2 2016 Maxmind GeoLite2
16705 o Minor features (user interface):
16706 - There is a new --list-deprecated-options command-line option to
16707 list all of the deprecated options. Implemented as part of
16710 o Minor bugfixes (code style):
16711 - Fix an integer signedness conversion issue in the case conversion
16712 tables. Fixes bug 19168; bugfix on 0.2.1.11-alpha.
16714 o Minor bugfixes (compilation):
16715 - Build correctly on versions of libevent2 without support for
16716 evutil_secure_rng_add_bytes(). Fixes bug 19904; bugfix
16718 - Fix a compilation warning on GCC versions before 4.6. Our
16719 ENABLE_GCC_WARNING macro used the word "warning" as an argument,
16720 when it is also required as an argument to the compiler pragma.
16721 Fixes bug 19901; bugfix on 0.2.9.1-alpha.
16723 o Minor bugfixes (compilation, also in 0.2.8.7):
16724 - Remove an inappropriate "inline" in tortls.c that was causing
16725 warnings on older versions of GCC. Fixes bug 19903; bugfix
16728 o Minor bugfixes (fallback directories, also in 0.2.8.7):
16729 - Avoid logging a NULL string pointer when loading fallback
16730 directory information. Fixes bug 19947; bugfix on 0.2.4.7-alpha
16731 and 0.2.8.1-alpha. Report and patch by "rubiate".
16733 o Minor bugfixes (logging):
16734 - Log a more accurate message when we fail to dump a microdescriptor.
16735 Fixes bug 17758; bugfix on 0.2.2.8-alpha. Patch from Daniel Pinto.
16737 o Minor bugfixes (memory leak):
16738 - Fix a series of slow memory leaks related to parsing torrc files
16739 and options. Fixes bug 19466; bugfix on 0.2.1.6-alpha.
16741 o Deprecated features:
16742 - A number of DNS-cache-related sub-options for client ports are now
16743 deprecated for security reasons, and may be removed in a future
16744 version of Tor. (We believe that client-side DNS caching is a bad
16745 idea for anonymity, and you should not turn it on.) The options
16746 are: CacheDNS, CacheIPv4DNS, CacheIPv6DNS, UseDNSCache,
16747 UseIPv4Cache, and UseIPv6Cache.
16748 - A number of options are deprecated for security reasons, and may
16749 be removed in a future version of Tor. The options are:
16750 AllowDotExit, AllowInvalidNodes, AllowSingleHopCircuits,
16751 AllowSingleHopExits, ClientDNSRejectInternalAddresses,
16752 CloseHSClientCircuitsImmediatelyOnTimeout,
16753 CloseHSServiceRendCircuitsImmediatelyOnTimeout,
16754 ExcludeSingleHopRelays, FastFirstHopPK, TLSECGroup,
16755 UseNTorHandshake, and WarnUnsafeSocks.
16756 - The *ListenAddress options are now deprecated as unnecessary: the
16757 corresponding *Port options should be used instead. These options
16758 may someday be removed. The affected options are:
16759 ControlListenAddress, DNSListenAddress, DirListenAddress,
16760 NATDListenAddress, ORListenAddress, SocksListenAddress,
16761 and TransListenAddress.
16764 - Correct the IPv6 syntax in our documentation for the
16765 VirtualAddrNetworkIPv6 torrc option. Closes ticket 19743.
16768 - We no longer include the (dead, deprecated) bufferevent code in
16769 Tor. Closes ticket 19450. Based on a patch from U+039b.
16772 Changes in version 0.2.8.7 - 2016-08-24
16773 Tor 0.2.8.7 fixes an important bug related to the ReachableAddresses
16774 option in 0.2.8.6, and replaces a retiring bridge authority. Everyone
16775 who sets the ReachableAddresses option, and all bridges, are strongly
16776 encouraged to upgrade.
16778 o Directory authority changes:
16779 - The "Tonga" bridge authority has been retired; the new bridge
16780 authority is "Bifroest". Closes tickets 19728 and 19690.
16782 o Major bugfixes (client, security):
16783 - Only use the ReachableAddresses option to restrict the first hop
16784 in a path. In earlier versions of 0.2.8.x, it would apply to
16785 every hop in the path, with a possible degradation in anonymity
16786 for anyone using an uncommon ReachableAddress setting. Fixes bug
16787 19973; bugfix on 0.2.8.2-alpha.
16789 o Minor features (geoip):
16790 - Update geoip and geoip6 to the August 2 2016 Maxmind GeoLite2
16793 o Minor bugfixes (compilation):
16794 - Remove an inappropriate "inline" in tortls.c that was causing
16795 warnings on older versions of GCC. Fixes bug 19903; bugfix
16798 o Minor bugfixes (fallback directories):
16799 - Avoid logging a NULL string pointer when loading fallback
16800 directory information. Fixes bug 19947; bugfix on 0.2.4.7-alpha
16801 and 0.2.8.1-alpha. Report and patch by "rubiate".
16804 Changes in version 0.2.9.1-alpha - 2016-08-08
16805 Tor 0.2.9.1-alpha is the first alpha release in the 0.2.9 development
16806 series. It improves our support for hardened builds and compiler
16807 warnings, deploys some critical infrastructure for improvements to
16808 hidden services, includes a new timing backend that we hope to use for
16809 better support for traffic padding, makes it easier for programmers to
16810 log unexpected events, and contains other small improvements to
16811 security, correctness, and performance.
16813 Below are the changes since 0.2.8.6.
16815 o New system requirements:
16816 - Tor now requires Libevent version 2.0.10-stable or later. Older
16817 versions of Libevent have less efficient backends for several
16818 platforms, and lack the DNS code that we use for our server-side
16819 DNS support. This implements ticket 19554.
16820 - Tor now requires zlib version 1.2 or later, for security,
16821 efficiency, and (eventually) gzip support. (Back when we started,
16822 zlib 1.1 and zlib 1.0 were still found in the wild. 1.2 was
16823 released in 2003. We recommend the latest version.)
16825 o Major features (build, hardening):
16826 - Tor now builds with -ftrapv by default on compilers that support
16827 it. This option detects signed integer overflow (which C forbids),
16828 and turns it into a hard-failure. We do not apply this option to
16829 code that needs to run in constant time to avoid side-channels;
16830 instead, we use -fwrapv in that code. Closes ticket 17983.
16831 - When --enable-expensive-hardening is selected, stop applying the
16832 clang/gcc sanitizers to code that needs to run in constant time.
16833 Although we are aware of no introduced side-channels, we are not
16834 able to prove that there are none. Related to ticket 17983.
16836 o Major features (compilation):
16837 - Our big list of extra GCC warnings is now enabled by default when
16838 building with GCC (or with anything like Clang that claims to be
16839 GCC-compatible). To make all warnings into fatal compilation
16840 errors, pass --enable-fatal-warnings to configure. Closes
16842 - Use the Autoconf macro AC_USE_SYSTEM_EXTENSIONS to automatically
16843 turn on C and POSIX extensions. (Previously, we attempted to do
16844 this on an ad hoc basis.) Closes ticket 19139.
16846 o Major features (directory authorities, hidden services):
16847 - Directory authorities can now perform the shared randomness
16848 protocol specified by proposal 250. Using this protocol, directory
16849 authorities generate a global fresh random value every day. In the
16850 future, this value will be used by hidden services to select
16851 HSDirs. This release implements the directory authority feature;
16852 the hidden service side will be implemented in the future as part
16853 of proposal 224. Resolves ticket 16943; implements proposal 250.
16855 o Major features (downloading, random exponential backoff):
16856 - When we fail to download an object from a directory service, wait
16857 for an (exponentially increasing) randomized amount of time before
16858 retrying, rather than a fixed interval as we did before. This
16859 prevents a group of Tor instances from becoming too synchronized,
16860 or a single Tor instance from becoming too predictable, in its
16861 download schedule. Closes ticket 15942.
16863 o Major bugfixes (exit policies):
16864 - Avoid disclosing exit outbound bind addresses, configured port
16865 bind addresses, and local interface addresses in relay descriptors
16866 by default under ExitPolicyRejectPrivate. Instead, only reject
16867 these (otherwise unlisted) addresses if
16868 ExitPolicyRejectLocalInterfaces is set. Fixes bug 18456; bugfix on
16869 0.2.7.2-alpha. Patch by teor.
16871 o Major bugfixes (hidden service client):
16872 - Allow Tor clients with appropriate controllers to work with
16873 FetchHidServDescriptors set to 0. Previously, this option also
16874 disabled descriptor cache lookup, thus breaking hidden services
16875 entirely. Fixes bug 18704; bugfix on 0.2.0.20-rc. Patch by "twim".
16877 o Minor features (build, hardening):
16878 - Detect and work around a libclang_rt problem that would prevent
16879 clang from finding __mulodi4() on some 32-bit platforms, and thus
16880 keep -ftrapv from linking on those systems. Closes ticket 19079.
16881 - When building on a system without runtime support for the runtime
16882 hardening options, try to log a useful warning at configuration
16883 time, rather than an incomprehensible warning at link time. If
16884 expensive hardening was requested, this warning becomes an error.
16885 Closes ticket 18895.
16887 o Minor features (code safety):
16888 - In our integer-parsing functions, ensure that maxiumum value we
16889 give is no smaller than the minimum value. Closes ticket 19063;
16892 o Minor features (controller):
16893 - Implement new GETINFO queries for all downloads that use
16894 download_status_t to schedule retries. This allows controllers to
16895 examine the schedule for pending downloads. Closes ticket 19323.
16896 - Allow controllers to configure basic client authorization on
16897 hidden services when they create them with the ADD_ONION control
16898 command. Implements ticket 15588. Patch by "special".
16899 - Fire a STATUS_SERVER controller event whenever the hibernation
16900 status changes between "awake"/"soft"/"hard". Closes ticket 18685.
16902 o Minor features (directory authority):
16903 - Directory authorities now only give the Guard flag to a relay if
16904 they are also giving it the Stable flag. This change allows us to
16905 simplify path selection for clients. It should have minimal effect
16906 in practice, since >99% of Guards already have the Stable flag.
16907 Implements ticket 18624.
16908 - Directory authorities now write their v3-status-votes file out to
16909 disk earlier in the consensus process, so we have a record of the
16910 votes even if we abort the consensus process. Resolves
16913 o Minor features (hidden service):
16914 - Stop being so strict about the payload length of "rendezvous1"
16915 cells. We used to be locked in to the "TAP" handshake length, and
16916 now we can handle better handshakes like "ntor". Resolves
16919 o Minor features (infrastructure, time):
16920 - Tor now uses the operating system's monotonic timers (where
16921 available) for internal fine-grained timing. Previously we would
16922 look at the system clock, and then attempt to compensate for the
16923 clock running backwards. Closes ticket 18908.
16924 - Tor now includes an improved timer backend, so that we can
16925 efficiently support tens or hundreds of thousands of concurrent
16926 timers, as will be needed for some of our planned anti-traffic-
16927 analysis work. This code is based on William Ahern's "timeout.c"
16928 project, which implements a "tickless hierarchical timing wheel".
16929 Closes ticket 18365.
16931 o Minor features (logging):
16932 - Provide a more useful warning message when configured with an
16933 invalid Nickname. Closes ticket 18300; patch from "icanhasaccount".
16934 - When dumping unparseable router descriptors, optionally store them
16935 in separate files, named by digest, up to a configurable size
16936 limit. You can change the size limit by setting the
16937 MaxUnparseableDescSizeToLog option, and disable this feature by
16938 setting that option to 0. Closes ticket 18322.
16939 - Add a set of macros to check nonfatal assertions, for internal
16940 use. Migrating more of our checks to these should help us avoid
16941 needless crash bugs. Closes ticket 18613.
16943 o Minor features (performance):
16944 - Change the "optimistic data" extension from "off by default" to
16945 "on by default". The default was ordinarily overridden by a
16946 consensus option, but when clients were bootstrapping for the
16947 first time, they would not have a consensus to get the option
16948 from. Changing this default saves a round-trip during startup.
16949 Closes ticket 18815.
16951 o Minor features (relay, usability):
16952 - When the directory authorities refuse a bad relay's descriptor,
16953 encourage the relay operator to contact us. Many relay operators
16954 won't notice this line in their logs, but it's a win if even a few
16955 learn why we don't like what their relay was doing. Resolves
16958 o Minor features (testing):
16959 - Let backtrace tests work correctly under AddressSanitizer. Fixes
16960 part of bug 18934; bugfix on 0.2.5.2-alpha.
16961 - Move the test-network.sh script to chutney, and modify tor's test-
16962 network.sh to call the (newer) chutney version when available.
16963 Resolves ticket 19116. Patch by teor.
16964 - Use the lcov convention for marking lines as unreachable, so that
16965 we don't count them when we're generating test coverage data.
16966 Update our coverage tools to understand this convention. Closes
16969 o Minor bugfixes (bootstrap):
16970 - Remember the directory we fetched the consensus or previous
16971 certificates from, and use it to fetch future authority
16972 certificates. This change improves bootstrapping performance.
16973 Fixes bug 18963; bugfix on 0.2.8.1-alpha.
16975 o Minor bugfixes (build):
16976 - The test-stem and test-network makefile targets now depend only on
16977 the tor binary that they are testing. Previously, they depended on
16978 "make all". Fixes bug 18240; bugfix on 0.2.8.2-alpha. Based on a
16979 patch from "cypherpunks".
16981 o Minor bugfixes (circuits):
16982 - Make sure extend_info_from_router() is only called on servers.
16983 Fixes bug 19639; bugfix on 0.2.8.1-alpha.
16985 o Minor bugfixes (compilation):
16986 - When building with Clang, use a full set of GCC warnings.
16987 (Previously, we included only a subset, because of the way we
16988 detected them.) Fixes bug 19216; bugfix on 0.2.0.1-alpha.
16990 o Minor bugfixes (directory authority):
16991 - Authorities now sort the "package" lines in their votes, for ease
16992 of debugging. (They are already sorted in consensus documents.)
16993 Fixes bug 18840; bugfix on 0.2.6.3-alpha.
16994 - When parsing a detached signature, make sure we use the length of
16995 the digest algorithm instead of an hardcoded DIGEST256_LEN in
16996 order to avoid comparing bytes out-of-bounds with a smaller digest
16997 length such as SHA1. Fixes bug 19066; bugfix on 0.2.2.6-alpha.
16999 o Minor bugfixes (documentation):
17000 - Document the --passphrase-fd option in the tor manpage. Fixes bug
17001 19504; bugfix on 0.2.7.3-rc.
17002 - Fix the description of the --passphrase-fd option in the
17003 tor-gencert manpage. The option is used to pass the number of a
17004 file descriptor to read the passphrase from, not to read the file
17005 descriptor from. Fixes bug 19505; bugfix on 0.2.0.20-alpha.
17007 o Minor bugfixes (ephemeral hidden service):
17008 - When deleting an ephemeral hidden service, close its intro points
17009 even if they are not completely open. Fixes bug 18604; bugfix
17012 o Minor bugfixes (guard selection):
17013 - Use a single entry guard even if the NumEntryGuards consensus
17014 parameter is not provided. Fixes bug 17688; bugfix
17016 - Don't mark guards as unreachable if connection_connect() fails.
17017 That function fails for local reasons, so it shouldn't reveal
17018 anything about the status of the guard. Fixes bug 14334; bugfix
17021 o Minor bugfixes (hidden service client):
17022 - Increase the minimum number of internal circuits we preemptively
17023 build from 2 to 3, so a circuit is available when a client
17024 connects to another onion service. Fixes bug 13239; bugfix
17027 o Minor bugfixes (logging):
17028 - When logging a directory ownership mismatch, log the owning
17029 username correctly. Fixes bug 19578; bugfix on 0.2.2.29-beta.
17031 o Minor bugfixes (memory leaks):
17032 - Fix a small, uncommon memory leak that could occur when reading a
17033 truncated ed25519 key file. Fixes bug 18956; bugfix
17036 o Minor bugfixes (testing):
17037 - Allow clients to retry HSDirs much faster in test networks. Fixes
17038 bug 19702; bugfix on 0.2.7.1-alpha. Patch by teor.
17039 - Disable ASAN's detection of segmentation faults while running
17040 test_bt.sh, so that we can make sure that our own backtrace
17041 generation code works. Fixes another aspect of bug 18934; bugfix
17042 on 0.2.5.2-alpha. Patch from "cypherpunks".
17043 - Fix the test-network-all target on out-of-tree builds by using the
17044 correct path to the test driver script. Fixes bug 19421; bugfix
17047 o Minor bugfixes (time):
17048 - Improve overflow checks in tv_udiff and tv_mdiff. Fixes bug 19483;
17049 bugfix on all released tor versions.
17050 - When computing the difference between two times in milliseconds,
17051 we now round to the nearest millisecond correctly. Previously, we
17052 could sometimes round in the wrong direction. Fixes bug 19428;
17053 bugfix on 0.2.2.2-alpha.
17055 o Minor bugfixes (user interface):
17056 - Display a more accurate number of suppressed messages in the log
17057 rate-limiter. Previously, there was a potential integer overflow
17058 in the counter. Now, if the number of messages hits a maximum, the
17059 rate-limiter doesn't count any further. Fixes bug 19435; bugfix
17061 - Fix a typo in the passphrase prompt for the ed25519 identity key.
17062 Fixes bug 19503; bugfix on 0.2.7.2-alpha.
17064 o Code simplification and refactoring:
17065 - Remove redundant declarations of the MIN macro. Closes
17067 - Rename tor_dup_addr() to tor_addr_to_str_dup() to avoid confusion.
17068 Closes ticket 18462; patch from "icanhasaccount".
17069 - Split the 600-line directory_handle_command_get function into
17070 separate functions for different URL types. Closes ticket 16698.
17073 - Fix spelling of "--enable-tor2web-mode" in the manpage. Closes
17074 ticket 19153. Patch from "U+039b".
17076 o Removed features:
17077 - Remove support for "GET /tor/bytes.txt" DirPort request, and
17078 "GETINFO dir-usage" controller request, which were only available
17079 via a compile-time option in Tor anyway. Feature was added in
17080 0.2.2.1-alpha. Resolves ticket 19035.
17081 - There is no longer a compile-time option to disable support for
17082 TransPort. (If you don't want TransPort; just don't use it.) Patch
17083 from "U+039b". Closes ticket 19449.
17086 - Run more workqueue tests as part of "make check". These had
17087 previously been implemented, but you needed to know special
17088 command-line options to enable them.
17089 - We now have unit tests for our code to reject zlib "compression
17090 bombs". (Fortunately, the code works fine.)
17093 Changes in version 0.2.8.6 - 2016-08-02
17095 Tor 0.2.8.6 is the first stable version of the Tor 0.2.8 series.
17097 The Tor 0.2.8 series improves client bootstrapping performance,
17098 completes the authority-side implementation of improved identity
17099 keys for relays, and includes numerous bugfixes and performance
17100 improvements throughout the program. This release continues to
17101 improve the coverage of Tor's test suite. For a full list of
17102 changes since Tor 0.2.7, see the ReleaseNotes file.
17104 Changes since 0.2.8.5-rc:
17106 o Minor features (geoip):
17107 - Update geoip and geoip6 to the July 6 2016 Maxmind GeoLite2
17110 o Minor bugfixes (compilation):
17111 - Fix a compilation warning in the unit tests on systems where char
17112 is signed. Fixes bug 19682; bugfix on 0.2.8.1-alpha.
17114 o Minor bugfixes (fallback directories):
17115 - Remove 1 fallback that was on the hardcoded list, then opted-out,
17116 leaving 89 of the 100 fallbacks originally introduced in Tor
17117 0.2.8.2-alpha in March 2016. Closes ticket 19782; patch by teor.
17119 o Minor bugfixes (Linux seccomp2 sandbox):
17120 - Allow more syscalls when running with "Sandbox 1" enabled:
17121 sysinfo, getsockopt(SO_SNDBUF), and setsockopt(SO_SNDBUFFORCE). On
17122 some systems, these are required for Tor to start. Fixes bug
17123 18397; bugfix on 0.2.5.1-alpha. Patch from Daniel Pinto.
17124 - Allow IPPROTO_UDP datagram sockets when running with "Sandbox 1",
17125 so that get_interface_address6_via_udp_socket_hack() can work.
17126 Fixes bug 19660; bugfix on 0.2.5.1-alpha.
17129 Changes in version 0.2.8.5-rc - 2016-07-07
17130 Tor 0.2.8.5-rc is the second release candidate in the Tor 0.2.8
17131 series. If we find no new bugs or regressions here, the first stable
17132 0.2.8 release will be identical to it. It has a few small bugfixes
17133 against previous versions.
17135 o Directory authority changes:
17136 - Urras is no longer a directory authority. Closes ticket 19271.
17138 o Major bugfixes (heartbeat):
17139 - Fix a regression that would crash Tor when the periodic
17140 "heartbeat" log messages were disabled. Fixes bug 19454; bugfix on
17141 0.2.8.1-alpha. Reported by "kubaku".
17143 o Minor features (build):
17144 - Tor now again builds with the recent OpenSSL 1.1 development
17145 branch (tested against 1.1.0-pre6-dev). Closes ticket 19499.
17146 - When building manual pages, set the timezone to "UTC", so that the
17147 output is reproducible. Fixes bug 19558; bugfix on 0.2.2.9-alpha.
17148 Patch from intrigeri.
17150 o Minor bugfixes (fallback directory selection):
17151 - Avoid errors during fallback selection if there are no eligible
17152 fallbacks. Fixes bug 19480; bugfix on 0.2.8.3-alpha. Patch
17155 o Minor bugfixes (IPv6, microdescriptors):
17156 - Don't check node addresses when we only have a routerstatus. This
17157 allows IPv6-only clients to bootstrap by fetching microdescriptors
17158 from fallback directory mirrors. (The microdescriptor consensus
17159 has no IPv6 addresses in it.) Fixes bug 19608; bugfix
17162 o Minor bugfixes (logging):
17163 - Reduce pointlessly verbose log messages when directory servers
17164 can't be found. Fixes bug 18849; bugfix on 0.2.8.3-alpha and
17165 0.2.8.1-alpha. Patch by teor.
17166 - When a fallback directory changes its fingerprint from the hard-
17167 coded fingerprint, log a less severe, more explanatory log
17168 message. Fixes bug 18812; bugfix on 0.2.8.1-alpha. Patch by teor.
17170 o Minor bugfixes (Linux seccomp2 sandboxing):
17171 - Allow statistics to be written to disk when "Sandbox 1" is
17172 enabled. Fixes bugs 19556 and 19957; bugfix on 0.2.5.1-alpha and
17173 0.2.6.1-alpha respectively.
17175 o Minor bugfixes (user interface):
17176 - Remove a warning message "Service [scrubbed] not found after
17177 descriptor upload". This message appears when one uses HSPOST
17178 control command to upload a service descriptor. Since there is
17179 only a descriptor and no service, showing this message is
17180 pointless and confusing. Fixes bug 19464; bugfix on 0.2.7.2-alpha.
17182 o Fallback directory list:
17183 - Add a comment to the generated fallback directory list that
17184 explains how to comment out unsuitable fallbacks in a way that's
17185 compatible with the stem fallback parser.
17186 - Update fallback whitelist and blacklist based on relay operator
17187 emails. Blacklist unsuitable (non-working, over-volatile)
17188 fallbacks. Resolves ticket 19071. Patch by teor.
17189 - Remove 10 unsuitable fallbacks, leaving 90 of the 100 fallbacks
17190 originally introduced in Tor 0.2.8.2-alpha in March 2016. Closes
17191 ticket 19071; patch by teor.
17194 Changes in version 0.2.8.4-rc - 2016-06-15
17195 Tor 0.2.8.4-rc is the first release candidate in the Tor 0.2.8 series.
17196 If we find no new bugs or regressions here, the first stable 0.2.8
17197 release will be identical to it. It has a few small bugfixes against
17200 o Major bugfixes (user interface):
17201 - Correctly give a warning in the cases where a relay is specified
17202 by nickname, and one such relay is found, but it is not officially
17203 Named. Fixes bug 19203; bugfix on 0.2.3.1-alpha.
17205 o Minor features (build):
17206 - Tor now builds once again with the recent OpenSSL 1.1 development
17207 branch (tested against 1.1.0-pre5 and 1.1.0-pre6-dev).
17209 o Minor features (geoip):
17210 - Update geoip and geoip6 to the June 7 2016 Maxmind GeoLite2
17213 o Minor bugfixes (compilation):
17214 - Cause the unit tests to compile correctly on mingw64 versions that
17215 lack sscanf. Fixes bug 19213; bugfix on 0.2.7.1-alpha.
17217 o Minor bugfixes (downloading):
17218 - Predict more correctly whether we'll be downloading over HTTP when
17219 we determine the maximum length of a URL. This should avoid a
17220 "BUG" warning about the Squid HTTP proxy and its URL limits. Fixes
17224 Changes in version 0.2.8.3-alpha - 2016-05-26
17225 Tor 0.2.8.3-alpha resolves several bugs, most of them introduced over
17226 the course of the 0.2.8 development cycle. It improves the behavior of
17227 directory clients, fixes several crash bugs, fixes a gap in compiler
17228 hardening, and allows the full integration test suite to run on
17231 o Major bugfixes (security, client, DNS proxy):
17232 - Stop a crash that could occur when a client running with DNSPort
17233 received a query with multiple address types, and the first
17234 address type was not supported. Found and fixed by Scott Dial.
17235 Fixes bug 18710; bugfix on 0.2.5.4-alpha.
17237 o Major bugfixes (security, compilation):
17238 - Correctly detect compiler flags on systems where _FORTIFY_SOURCE
17239 is predefined. Previously, our use of -D_FORTIFY_SOURCE would
17240 cause a compiler warning, thereby making other checks fail, and
17241 needlessly disabling compiler-hardening support. Fixes one case of
17242 bug 18841; bugfix on 0.2.3.17-beta. Patch from "trudokal".
17244 o Major bugfixes (security, directory authorities):
17245 - Fix a crash and out-of-bounds write during authority voting, when
17246 the list of relays includes duplicate ed25519 identity keys. Fixes
17247 bug 19032; bugfix on 0.2.8.2-alpha.
17249 o Major bugfixes (client, bootstrapping):
17250 - Check if bootstrap consensus downloads are still needed when the
17251 linked connection attaches. This prevents tor making unnecessary
17252 begindir-style connections, which are the only directory
17253 connections tor clients make since the fix for 18483 was merged.
17254 - Fix some edge cases where consensus download connections may not
17255 have been closed, even though they were not needed. Related to fix
17257 - Make relays retry consensus downloads the correct number of times,
17258 rather than the more aggressive client retry count. Fixes part of
17260 - Stop downloading consensuses when we have a consensus, even if we
17261 don't have all the certificates for it yet. Fixes bug 18809;
17262 bugfix on 0.2.8.1-alpha. Patches by arma and teor.
17264 o Major bugfixes (directory mirrors):
17265 - Decide whether to advertise begindir support in the the same way
17266 we decide whether to advertise our DirPort. Allowing these
17267 decisions to become out-of-sync led to surprising behavior like
17268 advertising begindir support when hibernation made us not
17269 advertise a DirPort. Resolves bug 18616; bugfix on 0.2.8.1-alpha.
17272 o Major bugfixes (IPv6 bridges, client):
17273 - Actually use IPv6 addresses when selecting directory addresses for
17274 IPv6 bridges. Fixes bug 18921; bugfix on 0.2.8.1-alpha. Patch
17277 o Major bugfixes (key management):
17278 - If OpenSSL fails to generate an RSA key, do not retain a dangling
17279 pointer to the previous (uninitialized) key value. The impact here
17280 should be limited to a difficult-to-trigger crash, if OpenSSL is
17281 running an engine that makes key generation failures possible, or
17282 if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
17283 0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
17286 o Major bugfixes (testing):
17287 - Fix a bug that would block 'make test-network-all' on systems where
17288 IPv6 packets were lost. Fixes bug 19008; bugfix on 0.2.7.3-rc.
17289 - Avoid "WSANOTINITIALISED" warnings in the unit tests. Fixes bug 18668;
17290 bugfix on 0.2.8.1-alpha.
17292 o Minor features (clients):
17293 - Make clients, onion services, and bridge relays always use an
17294 encrypted begindir connection for directory requests. Resolves
17295 ticket 18483. Patch by "teor".
17297 o Minor features (fallback directory mirrors):
17298 - Give each fallback the same weight for client selection; restrict
17299 fallbacks to one per operator; report fallback directory detail
17300 changes when rebuilding list; add new fallback directory mirrors
17301 to the whitelist; and many other minor simplifications and fixes.
17302 Closes tasks 17905, 18749, bug 18689, and fixes part of bug 18812 on
17303 0.2.8.1-alpha; patch by "teor".
17304 - Replace the 21 fallbacks generated in January 2016 and included in
17305 Tor 0.2.8.1-alpha, with a list of 100 fallbacks generated in March
17306 2016. Closes task 17158; patch by "teor".
17308 o Minor features (geoip):
17309 - Update geoip and geoip6 to the May 4 2016 Maxmind GeoLite2
17312 o Minor bugfixes (assert, portability):
17313 - Fix an assertion failure in memarea.c on systems where "long" is
17314 shorter than the size of a pointer. Fixes bug 18716; bugfix
17317 o Minor bugfixes (bootstrap):
17318 - Consistently use the consensus download schedule for authority
17319 certificates. Fixes bug 18816; bugfix on 0.2.4.13-alpha.
17321 o Minor bugfixes (build):
17322 - Remove a pair of redundant AM_CONDITIONAL declarations from
17323 configure.ac. Fixes one final case of bug 17744; bugfix
17325 - Resolve warnings when building on systems that are concerned with
17326 signed char. Fixes bug 18728; bugfix on 0.2.7.2-alpha
17328 - When libscrypt.h is found, but no libscrypt library can be linked,
17329 treat libscrypt as absent. Fixes bug 19161; bugfix
17332 o Minor bugfixes (client):
17333 - Turn all TestingClientBootstrap* into non-testing torrc options.
17334 This changes simply renames them by removing "Testing" in front of
17335 them and they do not require TestingTorNetwork to be enabled
17336 anymore. Fixes bug 18481; bugfix on 0.2.8.1-alpha.
17337 - Make directory node selection more reliable, mainly for IPv6-only
17338 clients and clients with few reachable addresses. Fixes bug 18929;
17339 bugfix on 0.2.8.1-alpha. Patch by "teor".
17341 o Minor bugfixes (controller, microdescriptors):
17342 - Make GETINFO dir/status-vote/current/consensus conform to the
17343 control specification by returning "551 Could not open cached
17344 consensus..." when not caching consensuses. Fixes bug 18920;
17345 bugfix on 0.2.2.6-alpha.
17347 o Minor bugfixes (crypto, portability):
17348 - The SHA3 and SHAKE routines now produce the correct output on Big
17349 Endian systems. No code calls either algorithm yet, so this is
17350 primarily a build fix. Fixes bug 18943; bugfix on 0.2.8.1-alpha.
17351 - Tor now builds again with the recent OpenSSL 1.1 development
17352 branch (tested against 1.1.0-pre4 and 1.1.0-pre5-dev). Closes
17355 o Minor bugfixes (directories):
17356 - When fetching extrainfo documents, compare their SHA256 digests
17357 and Ed25519 signing key certificates with the routerinfo that led
17358 us to fetch them, rather than with the most recent routerinfo.
17359 Otherwise we generate many spurious warnings about mismatches.
17360 Fixes bug 17150; bugfix on 0.2.7.2-alpha.
17362 o Minor bugfixes (logging):
17363 - When we can't generate a signing key because OfflineMasterKey is
17364 set, do not imply that we should have been able to load it. Fixes
17365 bug 18133; bugfix on 0.2.7.2-alpha.
17366 - Stop periodic_event_dispatch() from blasting twelve lines per
17367 second at loglevel debug. Fixes bug 18729; fix on 0.2.8.1-alpha.
17368 - When rejecting a misformed INTRODUCE2 cell, only log at
17369 PROTOCOL_WARN severity. Fixes bug 18761; bugfix on 0.2.8.2-alpha.
17371 o Minor bugfixes (pluggable transports):
17372 - Avoid reporting a spurious error when we decide that we don't need
17373 to terminate a pluggable transport because it has already exited.
17374 Fixes bug 18686; bugfix on 0.2.5.5-alpha.
17376 o Minor bugfixes (pointer arithmetic):
17377 - Fix a bug in memarea_alloc() that could have resulted in remote
17378 heap write access, if Tor had ever passed an unchecked size to
17379 memarea_alloc(). Fortunately, all the sizes we pass to
17380 memarea_alloc() are pre-checked to be less than 128 kilobytes.
17381 Fixes bug 19150; bugfix on 0.2.1.1-alpha. Bug found by
17384 o Minor bugfixes (relays):
17385 - Consider more config options when relays decide whether to
17386 regenerate their descriptor. Fixes more of bug 12538; bugfix
17388 - Resolve some edge cases where we might launch an ORPort
17389 reachability check even when DisableNetwork is set. Noticed while
17390 fixing bug 18616; bugfix on 0.2.3.9-alpha.
17392 o Minor bugfixes (statistics):
17393 - We now include consensus downloads via IPv6 in our directory-
17394 request statistics. Fixes bug 18460; bugfix on 0.2.3.14-alpha.
17396 o Minor bugfixes (testing):
17397 - Allow directories in small networks to bootstrap by skipping
17398 DirPort checks when the consensus has no exits. Fixes bug 19003;
17399 bugfix on 0.2.8.1-alpha. Patch by teor.
17400 - Fix a small memory leak that would occur when the
17401 TestingEnableCellStatsEvent option was turned on. Fixes bug 18673;
17402 bugfix on 0.2.5.2-alpha.
17404 o Minor bugfixes (time handling):
17405 - When correcting a corrupt 'struct tm' value, fill in the tm_wday
17406 field. Otherwise, our unit tests crash on Windows. Fixes bug
17407 18977; bugfix on 0.2.2.25-alpha.
17410 - Document the contents of the 'datadir/keys' subdirectory in the
17411 manual page. Closes ticket 17621.
17412 - Stop recommending use of nicknames to identify relays in our
17413 MapAddress documentation. Closes ticket 18312.
17416 Changes in version 0.2.8.2-alpha - 2016-03-28
17417 Tor 0.2.8.2-alpha is the second alpha in its series. It fixes numerous
17418 bugs in earlier versions of Tor, including some that prevented
17419 authorities using Tor 0.2.7.x from running correctly. IPv6 and
17420 directory support should also be much improved.
17422 o New system requirements:
17423 - Tor no longer supports versions of OpenSSL with a broken
17424 implementation of counter mode. (This bug was present in OpenSSL
17425 1.0.0, and was fixed in OpenSSL 1.0.0a.) Tor still detects, but no
17426 longer runs with, these versions.
17427 - Tor no longer attempts to support platforms where the "time_t"
17428 type is unsigned. (To the best of our knowledge, only OpenVMS does
17429 this, and Tor has never actually built on OpenVMS.) Closes
17431 - Tor now uses Autoconf version 2.63 or later, and Automake 1.11 or
17432 later (released in 2008 and 2009 respectively). If you are
17433 building Tor from the git repository instead of from the source
17434 distribution, and your tools are older than this, you will need to
17435 upgrade. Closes ticket 17732.
17437 o Major bugfixes (security, pointers):
17438 - Avoid a difficult-to-trigger heap corruption attack when extending
17439 a smartlist to contain over 16GB of pointers. Fixes bug 18162;
17440 bugfix on 0.1.1.11-alpha, which fixed a related bug incompletely.
17441 Reported by Guido Vranken.
17443 o Major bugfixes (bridges, pluggable transports):
17444 - Modify the check for OR connections to private addresses. Allow
17445 bridges on private addresses, including pluggable transports that
17446 ignore the (potentially private) address in the bridge line. Fixes
17447 bug 18517; bugfix on 0.2.8.1-alpha. Reported by gk, patch by teor.
17449 o Major bugfixes (compilation):
17450 - Repair hardened builds under the clang compiler. Previously, our
17451 use of _FORTIFY_SOURCE would conflict with clang's address
17452 sanitizer. Fixes bug 14821; bugfix on 0.2.5.4-alpha.
17454 o Major bugfixes (crash on shutdown):
17455 - Correctly handle detaching circuits from muxes when shutting down.
17456 Fixes bug 18116; bugfix on 0.2.8.1-alpha.
17457 - Fix an assert-on-exit bug related to counting memory usage in
17458 rephist.c. Fixes bug 18651; bugfix on 0.2.8.1-alpha.
17460 o Major bugfixes (crash on startup):
17461 - Fix a segfault during startup: If a Unix domain socket was
17462 configured as listener (such as a ControlSocket or a SocksPort
17463 "unix:" socket), and tor was started as root but not configured to
17464 switch to another user, tor would segfault while trying to string
17465 compare a NULL value. Fixes bug 18261; bugfix on 0.2.8.1-alpha.
17468 o Major bugfixes (dns proxy mode, crash):
17469 - Avoid crashing when running as a DNS proxy. Fixes bug 16248;
17470 bugfix on 0.2.0.1-alpha. Patch from "cypherpunks".
17472 o Major bugfixes (relays, bridge clients):
17473 - Ensure relays always allow IPv4 OR and Dir connections. Ensure
17474 bridge clients use the address configured in the bridge line.
17475 Fixes bug 18348; bugfix on 0.2.8.1-alpha. Reported by sysrqb,
17478 o Major bugfixes (voting):
17479 - Actually enable support for authorities to match routers by their
17480 Ed25519 identities. Previously, the code had been written, but
17481 some debugging code that had accidentally been left in the
17482 codebase made it stay turned off. Fixes bug 17702; bugfix
17484 - When collating votes by Ed25519 identities, authorities now
17485 include a "NoEdConsensus" flag if the ed25519 value (or lack
17486 thereof) for a server does not reflect the majority consensus.
17487 Related to bug 17668; bugfix on 0.2.7.2-alpha.
17488 - When generating a vote with keypinning disabled, never include two
17489 entries for the same ed25519 identity. This bug was causing
17490 authorities to generate votes that they could not parse when a
17491 router violated key pinning by changing its RSA identity but
17492 keeping its Ed25519 identity. Fixes bug 17668; fixes part of bug
17493 18318. Bugfix on 0.2.7.2-alpha.
17495 o Minor features (security, win32):
17496 - Set SO_EXCLUSIVEADDRUSE on Win32 to avoid a local port-stealing
17497 attack. Fixes bug 18123; bugfix on all tor versions. Patch
17500 o Minor features (bug-resistance):
17501 - Make Tor survive errors involving connections without a
17502 corresponding event object. Previously we'd fail with an
17503 assertion; now we produce a log message. Related to bug 16248.
17505 o Minor features (build):
17506 - Detect systems with FreeBSD-derived kernels (such as GNU/kFreeBSD)
17507 as having possible IPFW support. Closes ticket 18448. Patch from
17508 Steven Chamberlain.
17510 o Minor features (code hardening):
17511 - Use tor_snprintf() and tor_vsnprintf() even in external and low-
17512 level code, to harden against accidental failures to NUL-
17513 terminate. Part of ticket 17852. Patch from jsturgix. Found
17516 o Minor features (crypto):
17517 - Validate the hard-coded Diffie-Hellman parameters and ensure that
17518 p is a safe prime, and g is a suitable generator. Closes
17521 o Minor features (geoip):
17522 - Update geoip and geoip6 to the March 3 2016 Maxmind GeoLite2
17525 o Minor features (hidden service directory):
17526 - Streamline relay-side hsdir handling: when relays consider whether
17527 to accept an uploaded hidden service descriptor, they no longer
17528 check whether they are one of the relays in the network that is
17529 "supposed" to handle that descriptor. Implements ticket 18332.
17531 o Minor features (IPv6):
17532 - Add ClientPreferIPv6DirPort, which is set to 0 by default. If set
17533 to 1, tor prefers IPv6 directory addresses.
17534 - Add ClientUseIPv4, which is set to 1 by default. If set to 0, tor
17535 avoids using IPv4 for client OR and directory connections.
17536 - Try harder to obey the IP version restrictions "ClientUseIPv4 0",
17537 "ClientUseIPv6 0", "ClientPreferIPv6ORPort", and
17538 "ClientPreferIPv6DirPort". Closes ticket 17840; patch by teor.
17540 o Minor features (linux seccomp2 sandbox):
17541 - Reject attempts to change our Address with "Sandbox 1" enabled.
17542 Changing Address with Sandbox turned on would never actually work,
17543 but previously it would fail in strange and confusing ways. Found
17544 while fixing 18548.
17546 o Minor features (robustness):
17547 - Exit immediately with an error message if the code attempts to use
17548 Libevent without having initialized it. This should resolve some
17549 frequently-made mistakes in our unit tests. Closes ticket 18241.
17551 o Minor features (unix domain sockets):
17552 - Add a new per-socket option, RelaxDirModeCheck, to allow creating
17553 Unix domain sockets without checking the permissions on the parent
17554 directory. (Tor checks permissions by default because some
17555 operating systems only check permissions on the parent directory.
17556 However, some operating systems do look at permissions on the
17557 socket, and tor's default check is unneeded.) Closes ticket 18458.
17560 o Minor bugfixes (exit policies, security):
17561 - Refresh an exit relay's exit policy when interface addresses
17562 change. Previously, tor only refreshed the exit policy when the
17563 configured external address changed. Fixes bug 18208; bugfix on
17564 0.2.7.3-rc. Patch by teor.
17566 o Minor bugfixes (security, hidden services):
17567 - Prevent hidden services connecting to client-supplied rendezvous
17568 addresses that are reserved as internal or multicast. Fixes bug
17569 8976; bugfix on 0.2.3.21-rc. Patch by dgoulet and teor.
17571 o Minor bugfixes (build):
17572 - Do not link the unit tests against both the testing and non-
17573 testing versions of the static libraries. Fixes bug 18490; bugfix
17575 - Avoid spurious failures from configure files related to calling
17576 exit(0) in TOR_SEARCH_LIBRARY. Fixes bug 18626; bugfix on
17577 0.2.0.1-alpha. Patch from "cypherpunks".
17578 - Silence spurious clang-scan warnings in the ed25519_donna code by
17579 explicitly initializing some objects. Fixes bug 18384; bugfix on
17580 0.2.7.2-alpha. Patch by teor.
17582 o Minor bugfixes (client, bootstrap):
17583 - Count receipt of new microdescriptors as progress towards
17584 bootstrapping. Previously, with EntryNodes set, Tor might not
17585 successfully repopulate the guard set on bootstrapping. Fixes bug
17586 16825; bugfix on 0.2.3.1-alpha.
17588 o Minor bugfixes (code correctness):
17589 - Update to the latest version of Trunnel, which tries harder to
17590 avoid generating code that can invoke memcpy(p,NULL,0). Bug found
17591 by clang address sanitizer. Fixes bug 18373; bugfix
17594 o Minor bugfixes (configuration):
17595 - Fix a tiny memory leak when parsing a port configuration ending in
17596 ":auto". Fixes bug 18374; bugfix on 0.2.3.3-alpha.
17598 o Minor bugfixes (containers):
17599 - If we somehow attempt to construct a heap with more than
17600 1073741822 elements, avoid an integer overflow when maintaining
17601 the heap property. Fixes bug 18296; bugfix on 0.1.2.1-alpha.
17603 o Minor bugfixes (correctness):
17604 - Fix a bad memory handling bug that would occur if we had queued a
17605 cell on a channel's incoming queue. Fortunately, we can't actually
17606 queue a cell like that as our code is constructed today, but it's
17607 best to avoid this kind of error, even if there isn't any code
17608 that triggers it today. Fixes bug 18570; bugfix on 0.2.4.4-alpha.
17610 o Minor bugfixes (directory):
17611 - When generating a URL for a directory server on an IPv6 address,
17612 wrap the IPv6 address in square brackets. Fixes bug 18051; bugfix
17613 on 0.2.3.9-alpha. Patch from Malek.
17615 o Minor bugfixes (fallback directory mirrors):
17616 - When requesting extrainfo descriptors from a trusted directory
17617 server, check whether it is an authority or a fallback directory
17618 which supports extrainfo descriptors. Fixes bug 18489; bugfix on
17619 0.2.4.7-alpha. Reported by atagar, patch by teor.
17621 o Minor bugfixes (hidden service, client):
17622 - Handle the case where the user makes several fast consecutive
17623 requests to the same .onion address. Previously, the first six
17624 requests would each trigger a descriptor fetch, each picking a
17625 directory (there are 6 overall) and the seventh one would fail
17626 because no directories were left, thereby triggering a close on
17627 all current directory connections asking for the hidden service.
17628 The solution here is to not close the connections if we have
17629 pending directory fetches. Fixes bug 15937; bugfix
17632 o Minor bugfixes (hidden service, control port):
17633 - Add the onion address to the HS_DESC event for the UPLOADED action
17634 both on success or failure. It was previously hardcoded with
17635 UNKNOWN. Fixes bug 16023; bugfix on 0.2.7.2-alpha.
17637 o Minor bugfixes (hidden service, directory):
17638 - Bridges now refuse "rendezvous2" (hidden service descriptor)
17639 publish attempts. Suggested by ticket 18332.
17641 o Minor bugfixes (linux seccomp2 sandbox):
17642 - Allow the setrlimit syscall, and the prlimit and prlimit64
17643 syscalls, which some libc implementations use under the hood.
17644 Fixes bug 15221; bugfix on 0.2.5.1-alpha.
17645 - Avoid a 10-second delay when starting as a client with "Sandbox 1"
17646 enabled and no DNS resolvers configured. This should help TAILS
17647 start up faster. Fixes bug 18548; bugfix on 0.2.5.1-alpha.
17648 - Fix the sandbox's interoperability with unix domain sockets under
17649 setuid. Fixes bug 18253; bugfix on 0.2.8.1-alpha.
17651 o Minor bugfixes (logging):
17652 - When logging information about an unparsable networkstatus vote or
17653 consensus, do not say "vote" when we mean consensus. Fixes bug
17654 18368; bugfix on 0.2.0.8-alpha.
17655 - Scrub service name in "unrecognized service ID" log messages.
17656 Fixes bug 18600; bugfix on 0.2.4.11-alpha.
17657 - Downgrade logs and backtraces about IP versions to info-level.
17658 Only log backtraces once each time tor runs. Assists in diagnosing
17659 bug 18351; bugfix on 0.2.8.1-alpha. Reported by sysrqb and
17660 Christian, patch by teor.
17662 o Minor bugfixes (memory safety):
17663 - Avoid freeing an uninitialized pointer when opening a socket fails
17664 in get_interface_addresses_ioctl(). Fixes bug 18454; bugfix on
17665 0.2.3.11-alpha. Reported by toralf and "cypherpunks", patch
17667 - Correctly duplicate addresses in get_interface_address6_list().
17668 Fixes bug 18454; bugfix on 0.2.8.1-alpha. Reported by toralf,
17669 patch by "cypherpunks".
17670 - Fix a memory leak in tor-gencert. Fixes part of bug 18672; bugfix
17672 - Fix a memory leak in "tor --list-fingerprint". Fixes part of bug
17673 18672; bugfix on 0.2.5.1-alpha.
17675 o Minor bugfixes (private directory):
17676 - Prevent a race condition when creating private directories. Fixes
17677 part of bug 17852; bugfix on 0.0.2pre13. Part of ticket 17852.
17678 Patch from jsturgix. Found with Flawfinder.
17680 o Minor bugfixes (test networks, IPv6):
17681 - Allow internal IPv6 addresses in descriptors in test networks.
17682 Fixes bug 17153; bugfix on 0.2.3.16-alpha. Patch by teor, reported
17685 o Minor bugfixes (testing):
17686 - We no longer disable assertions in the unit tests when coverage is
17687 enabled. Instead, we require you to say --disable-asserts-in-tests
17688 to the configure script if you need assertions disabled in the
17689 unit tests (for example, if you want to perform branch coverage).
17690 Fixes bug 18242; bugfix on 0.2.7.1-alpha.
17692 o Minor bugfixes (time parsing):
17693 - Avoid overflow in tor_timegm when parsing dates in and after 2038
17694 on platforms with 32-bit time_t. Fixes bug 18479; bugfix on
17695 0.0.2pre14. Patch by teor.
17697 o Minor bugfixes (tor-gencert):
17698 - Correctly handle the case where an authority operator enters a
17699 passphrase but sends an EOF before sending a newline. Fixes bug
17700 17443; bugfix on 0.2.0.20-rc. Found by junglefowl.
17702 o Code simplification and refactoring:
17703 - Quote all the string interpolations in configure.ac -- even those
17704 which we are pretty sure can't contain spaces. Closes ticket
17705 17744. Patch from zerosion.
17706 - Remove specialized code for non-inplace AES_CTR. 99% of our AES is
17707 inplace, so there's no need to have a separate implementation for
17708 the non-inplace code. Closes ticket 18258. Patch from Malek.
17709 - Simplify return types for some crypto functions that can't
17710 actually fail. Patch from Hassan Alsibyani. Closes ticket 18259.
17713 - Change build messages to refer to "Fedora" instead of "Fedora
17714 Core", and "dnf" instead of "yum". Closes tickets 18459 and 18426.
17715 Patches from "icanhasaccount" and "cypherpunks".
17717 o Removed features:
17718 - We no longer maintain an internal freelist in memarea.c.
17719 Allocators should be good enough to make this code unnecessary,
17720 and it's doubtful that it ever had any performance benefit.
17723 - Fix several warnings from clang's address sanitizer produced in
17725 - Treat backtrace test failures as expected on FreeBSD until we
17726 solve bug 17808. Closes ticket 18204.
17729 Changes in version 0.2.8.1-alpha - 2016-02-04
17730 Tor 0.2.8.1-alpha is the first alpha release in its series. It
17731 includes numerous small features and bugfixes against previous Tor
17732 versions, and numerous small infrastructure improvements. The most
17733 notable features are a set of improvements to the directory subsystem.
17735 o Major features (security, Linux):
17736 - When Tor starts as root on Linux and is told to switch user ID, it
17737 can now retain the capability to bind to low ports. By default,
17738 Tor will do this only when it's switching user ID and some low
17739 ports have been configured. You can change this behavior with the
17740 new option KeepBindCapabilities. Closes ticket 8195.
17742 o Major features (directory system):
17743 - When bootstrapping multiple consensus downloads at a time, use the
17744 first one that starts downloading, and close the rest. This
17745 reduces failures when authorities or fallback directories are slow
17746 or down. Together with the code for feature 15775, this feature
17747 should reduces failures due to fallback churn. Implements ticket
17748 4483. Patch by "teor". Implements IPv4 portions of proposal 210 by
17749 "mikeperry" and "teor".
17750 - Include a trial list of 21 default fallback directories, generated
17751 in January 2016, based on an opt-in survey of suitable relays.
17752 Doing this should make clients bootstrap more quickly and reliably,
17753 and reduce the load on the directory authorities. Closes ticket
17754 15775. Patch by "teor".
17755 Candidates identified using an OnionOO script by "weasel", "teor",
17756 "gsathya", and "karsten".
17757 - Previously only relays that explicitly opened a directory port
17758 (DirPort) accepted directory requests from clients. Now all
17759 relays, with and without a DirPort, accept and serve tunneled
17760 directory requests that they receive through their ORPort. You can
17761 disable this behavior using the new DirCache option. Closes
17764 o Major key updates:
17765 - Update the V3 identity key for the dannenberg directory authority:
17766 it was changed on 18 November 2015. Closes task 17906. Patch
17769 o Minor features (security, clock):
17770 - Warn when the system clock appears to move back in time (when the
17771 state file was last written in the future). Tor doesn't know that
17772 consensuses have expired if the clock is in the past. Patch by
17773 "teor". Implements ticket 17188.
17775 o Minor features (security, exit policies):
17776 - ExitPolicyRejectPrivate now rejects more private addresses by
17777 default. Specifically, it now rejects the relay's outbound bind
17778 addresses (if configured), and the relay's configured port
17779 addresses (such as ORPort and DirPort). Fixes bug 17027; bugfix on
17780 0.2.0.11-alpha. Patch by "teor".
17782 o Minor features (security, memory erasure):
17783 - Set the unused entries in a smartlist to NULL. This helped catch
17784 a (harmless) bug, and shouldn't affect performance too much.
17785 Implements ticket 17026.
17786 - Use SecureMemoryWipe() function to securely clean memory on
17787 Windows. Previously we'd use OpenSSL's OPENSSL_cleanse() function.
17788 Implements feature 17986.
17789 - Use explicit_bzero or memset_s when present. Previously, we'd use
17790 OpenSSL's OPENSSL_cleanse() function. Closes ticket 7419; patches
17791 from <logan@hackers.mu> and <selven@hackers.mu>.
17792 - Make memwipe() do nothing when passed a NULL pointer or buffer of
17793 zero size. Check size argument to memwipe() for underflow. Fixes
17794 bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk",
17797 o Minor features (security, RNG):
17798 - Adjust Tor's use of OpenSSL's RNG APIs so that they absolutely,
17799 positively are not allowed to fail. Previously we depended on
17800 internal details of OpenSSL's behavior. Closes ticket 17686.
17801 - Never use the system entropy output directly for anything besides
17802 seeding the PRNG. When we want to generate important keys, instead
17803 of using system entropy directly, we now hash it with the PRNG
17804 stream. This may help resist certain attacks based on broken OS
17805 entropy implementations. Closes part of ticket 17694.
17806 - Use modern system calls (like getentropy() or getrandom()) to
17807 generate strong entropy on platforms that have them. Closes
17810 o Minor features (accounting):
17811 - Added two modes to the AccountingRule option: One for limiting
17812 only the number of bytes sent ("AccountingRule out"), and one for
17813 limiting only the number of bytes received ("AccountingRule in").
17814 Closes ticket 15989; patch from "unixninja92".
17816 o Minor features (build):
17817 - Since our build process now uses "make distcheck", we no longer
17818 force "make dist" to depend on "make check". Closes ticket 17893;
17819 patch from "cypherpunks."
17820 - Tor now builds successfully with the recent OpenSSL 1.1
17821 development branch, and with the latest LibreSSL. Closes tickets
17822 17549, 17921, and 17984.
17824 o Minor features (controller):
17825 - Adds the FallbackDir entries to 'GETINFO config/defaults'. Closes
17826 tickets 16774 and 17817. Patch by George Tankersley.
17827 - New 'GETINFO hs/service/desc/id/' command to retrieve a hidden
17828 service descriptor from a service's local hidden service
17829 descriptor cache. Closes ticket 14846.
17830 - Add 'GETINFO exit-policy/reject-private/[default,relay]', so
17831 controllers can examine the the reject rules added by
17832 ExitPolicyRejectPrivate. This makes it easier for stem to display
17835 o Minor features (crypto):
17836 - Add SHA512 support to crypto.c. Closes ticket 17663; patch from
17838 - Add SHA3 and SHAKE support to crypto.c. Closes ticket 17783.
17839 - When allocating a digest state object, allocate no more space than
17840 we actually need. Previously, we would allocate as much space as
17841 the state for the largest algorithm would need. This change saves
17842 up to 672 bytes per circuit. Closes ticket 17796.
17843 - Improve performance when hashing non-multiple of 8 sized buffers,
17844 based on Andrew Moon's public domain SipHash-2-4 implementation.
17845 Fixes bug 17544; bugfix on 0.2.5.3-alpha.
17847 o Minor features (directory downloads):
17848 - Wait for busy authorities and fallback directories to become non-
17849 busy when bootstrapping. (A similar change was made in 6c443e987d
17850 for directory caches chosen from the consensus.) Closes ticket
17851 17864; patch by "teor".
17852 - Add UseDefaultFallbackDirs, which enables any hard-coded fallback
17853 directory mirrors. The default is 1; set it to 0 to disable
17854 fallbacks. Implements ticket 17576. Patch by "teor".
17856 o Minor features (geoip):
17857 - Update geoip and geoip6 to the January 5 2016 Maxmind GeoLite2
17860 o Minor features (IPv6):
17861 - Add an argument 'ipv6=address:orport' to the DirAuthority and
17862 FallbackDir torrc options, to specify an IPv6 address for an
17863 authority or fallback directory. Add hard-coded ipv6 addresses for
17864 directory authorities that have them. Closes ticket 17327; patch
17865 from Nick Mathewson and "teor".
17866 - Add address policy assume_action support for IPv6 addresses.
17867 - Limit IPv6 mask bits to 128.
17868 - Warn when comparing against an AF_UNSPEC address in a policy, it's
17869 almost always a bug. Closes ticket 17863; patch by "teor".
17870 - Allow users to configure directory authorities and fallback
17871 directory servers with IPv6 addresses and ORPorts. Resolves
17873 - routerset_parse now accepts IPv6 literal addresses. Fixes bug
17874 17060; bugfix on 0.2.1.3-alpha. Patch by "teor".
17875 - Make tor_ersatz_socketpair work on IPv6-only systems. Fixes bug
17876 17638; bugfix on 0.0.2pre8. Patch by "teor".
17878 o Minor features (logging):
17879 - When logging to syslog, allow a tag to be added to the syslog
17880 identity (the string prepended to every log message). The tag can
17881 be configured with SyslogIdentityTag and defaults to none. Setting
17882 it to "foo" will cause logs to be tagged as "Tor-foo". Closes
17885 o Minor features (portability):
17886 - Use timingsafe_memcmp() where available. Closes ticket 17944;
17887 patch from <logan@hackers.mu>.
17889 o Minor features (relay, address discovery):
17890 - Add a family argument to get_interface_addresses_raw() and
17891 subfunctions to make network interface address interogation more
17892 efficient. Now Tor can specifically ask for IPv4, IPv6 or both
17893 types of interfaces from the operating system. Resolves
17895 - When get_interface_address6_list(.,AF_UNSPEC,.) is called and
17896 fails to enumerate interface addresses using the platform-specific
17897 API, have it rely on the UDP socket fallback technique to try and
17898 find out what IP addresses (both IPv4 and IPv6) our machine has.
17899 Resolves ticket 17951.
17901 o Minor features (replay cache):
17902 - The replay cache now uses SHA256 instead of SHA1. Implements
17903 feature 8961. Patch by "teor", issue reported by "rransom".
17905 o Minor features (unix file permissions):
17906 - Defer creation of Unix sockets until after setuid. This avoids
17907 needing CAP_CHOWN and CAP_FOWNER when using systemd's
17908 CapabilityBoundingSet, or chown and fowner when using SELinux.
17909 Implements part of ticket 17562. Patch from Jamie Nguyen.
17910 - If any directory created by Tor is marked as group readable, the
17911 filesystem group is allowed to be either the default GID or the
17912 root user. Allowing root to read the DataDirectory prevents the
17913 need for CAP_READ_SEARCH when using systemd's
17914 CapabilityBoundingSet, or dac_read_search when using SELinux.
17915 Implements part of ticket 17562. Patch from Jamie Nguyen.
17916 - Introduce a new DataDirectoryGroupReadable option. If it is set to
17917 1, the DataDirectory will be made readable by the default GID.
17918 Implements part of ticket 17562. Patch from Jamie Nguyen.
17920 o Minor bugfixes (accounting):
17921 - The max bandwidth when using 'AccountRule sum' is now correctly
17922 logged. Fixes bug 18024; bugfix on 0.2.6.1-alpha. Patch
17923 from "unixninja92".
17925 o Minor bugfixes (code correctness):
17926 - When closing an entry connection, generate a warning if we should
17927 have sent an end cell for it but we haven't. Fixes bug 17876;
17928 bugfix on 0.2.3.2-alpha.
17929 - Assert that allocated memory held by the reputation code is freed
17930 according to its internal counters. Fixes bug 17753; bugfix
17932 - Assert when the TLS contexts fail to initialize. Fixes bug 17683;
17935 o Minor bugfixes (compilation):
17936 - Mark all object files that include micro-revision.i as depending
17937 on it, so as to make parallel builds more reliable. Fixes bug
17938 17826; bugfix on 0.2.5.1-alpha.
17939 - Don't try to use the pthread_condattr_setclock() function unless
17940 it actually exists. Fixes compilation on NetBSD-6.x. Fixes bug
17941 17819; bugfix on 0.2.6.3-alpha.
17942 - Fix backtrace compilation on FreeBSD. Fixes bug 17827; bugfix
17944 - Fix compilation of sandbox.c with musl-libc. Fixes bug 17347;
17945 bugfix on 0.2.5.1-alpha. Patch from 'jamestk'.
17946 - Fix search for libevent libraries on OpenBSD (and other systems
17947 that install libevent 1 and libevent 2 in parallel). Fixes bug
17948 16651; bugfix on 0.1.0.7-rc. Patch from "rubiate".
17949 - Isolate environment variables meant for tests from the rest of the
17950 build system. Fixes bug 17818; bugfix on 0.2.7.3-rc.
17951 - Replace usage of 'INLINE' with 'inline'. Fixes bug 17804; bugfix
17953 - Remove config.log only from make distclean, not from make clean.
17954 Fixes bug 17924; bugfix on 0.2.4.1-alpha.
17956 o Minor bugfixes (crypto):
17957 - Check the return value of HMAC() and assert on failure. Fixes bug
17958 17658; bugfix on 0.2.3.6-alpha. Patch by "teor".
17960 o Minor bugfixes (fallback directories):
17961 - Mark fallbacks as "too busy" when they return a 503 response,
17962 rather than just marking authorities. Fixes bug 17572; bugfix on
17963 0.2.4.7-alpha. Patch by "teor".
17965 o Minor bugfixes (IPv6):
17966 - Update the limits in max_dl_per_request for IPv6 address length.
17967 Fixes bug 17573; bugfix on 0.2.1.5-alpha.
17969 o Minor bugfixes (linux seccomp2 sandbox):
17970 - Fix a crash when using offline master ed25519 keys with the Linux
17971 seccomp2 sandbox enabled. Fixes bug 17675; bugfix on 0.2.7.3-rc.
17973 o Minor bugfixes (logging):
17974 - In log messages that include a function name, use __FUNCTION__
17975 instead of __PRETTY_FUNCTION__. In GCC, these are synonymous, but
17976 with clang __PRETTY_FUNCTION__ has extra information we don't
17977 need. Fixes bug 16563; bugfix on 0.0.2pre8. Fix by Tom van
17979 - Remove needless quotes from a log message about unparseable
17980 addresses. Fixes bug 17843; bugfix on 0.2.3.3-alpha.
17982 o Minor bugfixes (portability):
17983 - Remove an #endif from configure.ac so that we correctly detect the
17984 presence of in6_addr.s6_addr32. Fixes bug 17923; bugfix
17987 o Minor bugfixes (relays):
17988 - Check that both the ORPort and DirPort (if present) are reachable
17989 before publishing a relay descriptor. Otherwise, relays publish a
17990 descriptor with DirPort 0 when the DirPort reachability test takes
17991 longer than the ORPort reachability test. Fixes bug 18050; bugfix
17992 on 0.1.0.1-rc. Reported by "starlight", patch by "teor".
17994 o Minor bugfixes (relays, hidden services):
17995 - Refuse connection requests to private OR addresses unless
17996 ExtendAllowPrivateAddresses is set. Previously, tor would connect,
17997 then refuse to send any cells to a private address. Fixes bugs
17998 17674 and 8976; bugfix on 0.2.3.21-rc. Patch by "teor".
18000 o Minor bugfixes (safe logging):
18001 - When logging a malformed hostname received through socks4, scrub
18002 it if SafeLogging says we should. Fixes bug 17419; bugfix
18005 o Minor bugfixes (statistics code):
18006 - Consistently check for overflow in round_*_to_next_multiple_of
18007 functions, and add unit tests with additional and maximal values.
18008 Fixes part of bug 13192; bugfix on 0.2.2.1-alpha.
18009 - Handle edge cases in the laplace functions: avoid division by
18010 zero, avoid taking the log of zero, and silence clang type
18011 conversion warnings using round and trunc. Add unit tests for edge
18012 cases with maximal values. Fixes part of bug 13192; bugfix
18015 o Minor bugfixes (testing):
18016 - The test for log_heartbeat was incorrectly failing in timezones
18017 with non-integer offsets. Instead of comparing the end of the time
18018 string against a constant, compare it to the output of
18019 format_local_iso_time when given the correct input. Fixes bug
18020 18039; bugfix on 0.2.5.4-alpha.
18021 - Make unit tests pass on IPv6-only systems, and systems without
18022 localhost addresses (like some FreeBSD jails). Fixes bug 17632;
18023 bugfix on 0.2.7.3-rc. Patch by "teor".
18024 - Fix a memory leak in the ntor test. Fixes bug 17778; bugfix
18026 - Check the full results of SHA256 and SHA512 digests in the unit
18027 tests. Bugfix on 0.2.2.4-alpha. Patch by "teor".
18029 o Code simplification and refactoring:
18030 - Move logging of redundant policy entries in
18031 policies_parse_exit_policy_internal into its own function. Closes
18032 ticket 17608; patch from "juce".
18033 - Extract the more complicated parts of circuit_mark_for_close()
18034 into a new function that we run periodically before circuits are
18035 freed. This change removes more than half of the functions
18036 currently in the "blob". Closes ticket 17218.
18037 - Clean up a little duplicated code in
18038 crypto_expand_key_material_TAP(). Closes ticket 17587; patch
18040 - Decouple the list of streams waiting to be attached to circuits
18041 from the overall connection list. This change makes it possible to
18042 attach streams quickly while simplifying Tor's callgraph and
18043 avoiding O(N) scans of the entire connection list. Closes
18045 - When a direct directory request fails immediately on launch,
18046 instead of relaunching that request from inside the code that
18047 launches it, instead mark the connection for teardown. This change
18048 simplifies Tor's callback and prevents the directory-request
18049 launching code from invoking itself recursively. Closes
18051 - Remove code for configuring OpenSSL dynamic locks; OpenSSL doesn't
18052 use them. Closes ticket 17926.
18055 - Add a description of the correct use of the '--keygen' command-
18056 line option. Closes ticket 17583; based on text by 's7r'.
18057 - Document the minimum HeartbeatPeriod value. Closes ticket 15638.
18058 - Explain actual minima for BandwidthRate. Closes ticket 16382.
18059 - Fix a minor formatting typo in the manpage. Closes ticket 17791.
18060 - Mention torspec URL in the manpage and point the reader to it
18061 whenever we mention a document that belongs in torspce. Fixes
18064 o Removed features:
18065 - Remove client-side support for connecting to Tor relays running
18066 versions of Tor before 0.2.3.6-alpha. These relays didn't support
18067 the v3 TLS handshake protocol, and are no longer allowed on the
18068 Tor network. Implements the client side of ticket 11150. Based on
18069 patches by Tom van der Woerdt.
18072 - Add unit tests to check for common RNG failure modes, such as
18073 returning all zeroes, identical values, or incrementing values
18074 (OpenSSL's rand_predictable feature). Patch by "teor".
18075 - Log more information when the backtrace tests fail. Closes ticket
18076 17892. Patch from "cypherpunks."
18077 - Always test both ed25519 backends, so that we can be sure that our
18078 batch-open replacement code works. Part of ticket 16794.
18079 - Cover dns_resolve_impl() in dns.c with unit tests. Implements a
18080 portion of ticket 16831.
18081 - More unit tests for compat_libevent.c, procmon.c, tortls.c,
18082 util_format.c, directory.c, and options_validate.c. Closes tickets
18083 17075, 17082, 17084, 17003, and 17076 respectively. Patches from
18085 - Unit tests for directory_handle_command_get. Closes ticket 17004.
18086 Patch from Reinaldo de Souza Jr.
18089 Changes in version 0.2.7.6 - 2015-12-10
18090 Tor version 0.2.7.6 fixes a major bug in entry guard selection, as
18091 well as a minor bug in hidden service reliability.
18093 o Major bugfixes (guard selection):
18094 - Actually look at the Guard flag when selecting a new directory
18095 guard. When we implemented the directory guard design, we
18096 accidentally started treating all relays as if they have the Guard
18097 flag during guard selection, leading to weaker anonymity and worse
18098 performance. Fixes bug 17772; bugfix on 0.2.4.8-alpha. Discovered
18101 o Minor features (geoip):
18102 - Update geoip and geoip6 to the December 1 2015 Maxmind GeoLite2
18105 o Minor bugfixes (compilation):
18106 - When checking for net/pfvar.h, include netinet/in.h if possible.
18107 This fixes transparent proxy detection on OpenBSD. Fixes bug
18108 17551; bugfix on 0.1.2.1-alpha. Patch from "rubiate".
18109 - Fix a compilation warning with Clang 3.6: Do not check the
18110 presence of an address which can never be NULL. Fixes bug 17781.
18112 o Minor bugfixes (correctness):
18113 - When displaying an IPv6 exit policy, include the mask bits
18114 correctly even when the number is greater than 31. Fixes bug
18115 16056; bugfix on 0.2.4.7-alpha. Patch from "gturner".
18116 - The wrong list was used when looking up expired intro points in a
18117 rend service object, causing what we think could be reachability
18118 issues for hidden services, and triggering a BUG log. Fixes bug
18119 16702; bugfix on 0.2.7.2-alpha.
18120 - Fix undefined behavior in the tor_cert_checksig function. Fixes
18121 bug 17722; bugfix on 0.2.7.2-alpha.
18124 Changes in version 0.2.7.5 - 2015-11-20
18125 The Tor 0.2.7 release series is dedicated to the memory of Tor user
18126 and privacy advocate Caspar Bowden (1961-2015). Caspar worked
18127 tirelessly to advocate human rights regardless of national borders,
18128 and oppose the encroachments of mass surveillance. He opposed national
18129 exceptionalism, he brought clarity to legal and policy debates, he
18130 understood and predicted the impact of mass surveillance on the world,
18131 and he laid the groundwork for resisting it. While serving on the Tor
18132 Project's board of directors, he brought us his uncompromising focus
18133 on technical excellence in the service of humankind. Caspar was an
18134 inimitable force for good and a wonderful friend. He was kind,
18135 humorous, generous, gallant, and believed we should protect one
18136 another without exception. We honor him here for his ideals, his
18137 efforts, and his accomplishments. Please honor his memory with works
18138 that would make him proud.
18140 Tor 0.2.7.5 is the first stable release in the Tor 0.2.7 series.
18142 The 0.2.7 series adds a more secure identity key type for relays,
18143 improves cryptography performance, resolves several longstanding
18144 hidden-service performance issues, improves controller support for
18145 hidden services, and includes small bugfixes and performance
18146 improvements throughout the program. This release series also includes
18147 more tests than before, and significant simplifications to which parts
18148 of Tor invoke which others.
18150 (This release contains no code changes since 0.2.7.4-rc.)
18153 Changes in version 0.2.7.4-rc - 2015-10-21
18154 Tor 0.2.7.4-rc is the second release candidate in the 0.2.7 series. It
18155 fixes some important memory leaks, and a scary-looking (but mostly
18156 harmless in practice) invalid-read bug. It also has a few small
18157 bugfixes, notably fixes for compilation and portability on different
18158 platforms. If no further significant bounds are found, the next
18159 release will the the official stable release.
18161 o Major bugfixes (security, correctness):
18162 - Fix an error that could cause us to read 4 bytes before the
18163 beginning of an openssl string. This bug could be used to cause
18164 Tor to crash on systems with unusual malloc implementations, or
18165 systems with unusual hardening installed. Fixes bug 17404; bugfix
18168 o Major bugfixes (correctness):
18169 - Fix a use-after-free bug in validate_intro_point_failure(). Fixes
18170 bug 17401; bugfix on 0.2.7.3-rc.
18172 o Major bugfixes (memory leaks):
18173 - Fix a memory leak in ed25519 batch signature checking. Fixes bug
18174 17398; bugfix on 0.2.6.1-alpha.
18175 - Fix a memory leak in rend_cache_failure_entry_free(). Fixes bug
18176 17402; bugfix on 0.2.7.3-rc.
18177 - Fix a memory leak when reading an expired signing key from disk.
18178 Fixes bug 17403; bugfix on 0.2.7.2-rc.
18180 o Minor features (geoIP):
18181 - Update geoip and geoip6 to the October 9 2015 Maxmind GeoLite2
18184 o Minor bugfixes (compilation):
18185 - Repair compilation with the most recent (unreleased, alpha)
18186 vesions of OpenSSL 1.1. Fixes part of ticket 17237.
18187 - Fix an integer overflow warning in test_crypto_slow.c. Fixes bug
18188 17251; bugfix on 0.2.7.2-alpha.
18189 - Fix compilation of sandbox.c with musl-libc. Fixes bug 17347;
18190 bugfix on 0.2.5.1-alpha. Patch from 'jamestk'.
18192 o Minor bugfixes (portability):
18193 - Use libexecinfo on FreeBSD to enable backtrace support. Fixes
18194 part of bug 17151; bugfix on 0.2.5.2-alpha. Patch from
18197 o Minor bugfixes (sandbox):
18198 - Add the "hidserv-stats" filename to our sandbox filter for the
18199 HiddenServiceStatistics option to work properly. Fixes bug 17354;
18200 bugfix on 0.2.6.2-alpha. Patch from David Goulet.
18202 o Minor bugfixes (testing):
18203 - Add unit tests for get_interface_address* failure cases. Fixes bug
18204 17173; bugfix on 0.2.7.3-rc. Patch by fk/teor.
18205 - Fix breakage when running 'make check' with BSD make. Fixes bug
18206 17154; bugfix on 0.2.7.3-rc. Patch by Marcin Cieślak.
18207 - Make the get_ifaddrs_* unit tests more tolerant of different
18208 network configurations. (Don't assume every test box has an IPv4
18209 address, and don't assume every test box has a non-localhost
18210 address.) Fixes bug 17255; bugfix on 0.2.7.3-rc. Patch by "teor".
18211 - Skip backtrace tests when backtrace support is not compiled in.
18212 Fixes part of bug 17151; bugfix on 0.2.7.1-alpha. Patch from
18216 - Fix capitalization of SOCKS in sample torrc. Closes ticket 15609.
18217 - Note that HiddenServicePorts can take a unix domain socket. Closes
18221 Changes in version 0.2.7.3-rc - 2015-09-25
18222 Tor 0.2.7.3-rc is the first release candidate in the 0.2.7 series. It
18223 contains numerous usability fixes for Ed25519 keys, safeguards against
18224 several misconfiguration problems, significant simplifications to
18225 Tor's callgraph, and numerous bugfixes and small features.
18227 This is the most tested release of Tor to date. The unit tests cover
18228 39.40% of the code, and the integration tests (accessible with "make
18229 test-full-online", requiring stem and chutney and a network
18230 connection) raise the coverage to 64.49%.
18232 o Major features (security, hidden services):
18233 - Hidden services, if using the EntryNodes option, are required to
18234 use more than one EntryNode, in order to avoid a guard discovery
18235 attack. (This would only affect people who had configured hidden
18236 services and manually specified the EntryNodes option with a
18237 single entry-node. The impact was that it would be easy to
18238 remotely identify the guard node used by such a hidden service.
18239 See ticket for more information.) Fixes ticket 14917.
18241 o Major features (Ed25519 keys, keypinning):
18242 - The key-pinning option on directory authorities is now advisory-
18243 only by default. In a future version, or when the AuthDirPinKeys
18244 option is set, pins are enforced again. Disabling key-pinning
18245 seemed like a good idea so that we can survive the fallout of any
18246 usability problems associated with Ed25519 keys. Closes
18249 o Major features (Ed25519 performance):
18250 - Improve the speed of Ed25519 operations and Curve25519 keypair
18251 generation when built targeting 32 bit x86 platforms with SSE2
18252 available. Implements ticket 16535.
18253 - Improve the runtime speed of Ed25519 signature verification by
18254 using Ed25519-donna's batch verification support. Implements
18257 o Major features (performance testing):
18258 - The test-network.sh script now supports performance testing.
18259 Requires corresponding chutney performance testing changes. Patch
18260 by "teor". Closes ticket 14175.
18262 o Major features (relay, Ed25519):
18263 - Significant usability improvements for Ed25519 key management. Log
18264 messages are better, and the code can recover from far more
18265 failure conditions. Thanks to "s7r" for reporting and diagnosing
18267 - Add a new OfflineMasterKey option to tell Tor never to try loading
18268 or generating a secret Ed25519 identity key. You can use this in
18269 combination with tor --keygen to manage offline and/or encrypted
18270 Ed25519 keys. Implements ticket 16944.
18271 - Add a --newpass option to allow changing or removing the
18272 passphrase of an encrypted key with tor --keygen. Implements part
18274 - On receiving a HUP signal, check to see whether the Ed25519
18275 signing key has changed, and reload it if so. Closes ticket 16790.
18277 o Major bugfixes (relay, Ed25519):
18278 - Avoid crashing on 'tor --keygen'. Fixes bug 16679; bugfix on
18279 0.2.7.2-alpha. Reported by "s7r".
18280 - Improve handling of expired signing keys with offline master keys.
18281 Fixes bug 16685; bugfix on 0.2.7.2-alpha. Reported by "s7r".
18283 o Minor features (client-side privacy):
18284 - New KeepAliveIsolateSOCKSAuth option to indefinitely extend circuit
18285 lifespan when IsolateSOCKSAuth and streams with SOCKS
18286 authentication are attached to the circuit. This allows
18287 applications like TorBrowser to manage circuit lifetime on their
18288 own. Implements feature 15482.
18289 - When logging malformed hostnames from SOCKS5 requests, respect
18290 SafeLogging configuration. Fixes bug 16891; bugfix on 0.1.1.16-rc.
18292 o Minor features (compilation):
18293 - Give a warning as early as possible when trying to build with an
18294 unsupported OpenSSL version. Closes ticket 16901.
18295 - Fail during configure if we're trying to build against an OpenSSL
18296 built without ECC support. Fixes bug 17109, bugfix on 0.2.7.1-alpha
18297 which started requiring ECC.
18299 o Minor features (geoip):
18300 - Update geoip and geoip6 to the September 3 2015 Maxmind GeoLite2
18303 o Minor features (hidden services):
18304 - Relays need to have the Fast flag to get the HSDir flag. As this
18305 is being written, we'll go from 2745 HSDirs down to 2342, a ~14%
18306 drop. This change should make some attacks against the hidden
18307 service directory system harder. Fixes ticket 15963.
18308 - Turn on hidden service statistics collection by setting the torrc
18309 option HiddenServiceStatistics to "1" by default. (This keeps
18310 track only of the fraction of traffic used by hidden services, and
18311 the total number of hidden services in existence.) Closes
18313 - Client now uses an introduction point failure cache to know when
18314 to fetch or keep a descriptor in their cache. Previously, failures
18315 were recorded implicitly, but not explicitly remembered. Closes
18318 o Minor features (testing, authorities, documentation):
18319 - New TestingDirAuthVote{Exit,Guard,HSDir}IsStrict flags to
18320 explicitly manage consensus flags in testing networks. Patch by
18321 "robgjansen", modified by "teor". Implements part of ticket 14882.
18323 o Minor bugfixes (security, exit policies):
18324 - ExitPolicyRejectPrivate now also rejects the relay's published
18325 IPv6 address (if any), and any publicly routable IPv4 or IPv6
18326 addresses on any local interfaces. ticket 17027. Patch by "teor".
18327 Fixes bug 17027; bugfix on 0.2.0.11-alpha.
18329 o Minor bug fixes (torrc exit policies):
18330 - In torrc, "accept6 *" and "reject6 *" ExitPolicy lines now only
18331 produce IPv6 wildcard addresses. Previously they would produce
18332 both IPv4 and IPv6 wildcard addresses. Patch by "teor". Fixes part
18333 of bug 16069; bugfix on 0.2.4.7-alpha.
18334 - When parsing torrc ExitPolicies, we now warn for a number of cases
18335 where the user's intent is likely to differ from Tor's actual
18336 behavior. These include: using an IPv4 address with an accept6 or
18337 reject6 line; using "private" on an accept6 or reject6 line; and
18338 including any ExitPolicy lines after accept *:* or reject *:*.
18339 Related to ticket 16069.
18340 - When parsing torrc ExitPolicies, we now issue an info-level
18341 message when expanding an "accept/reject *" line to include both
18342 IPv4 and IPv6 wildcard addresses. Related to ticket 16069.
18343 - In each instance above, usage advice is provided to avoid the
18344 message. Resolves ticket 16069. Patch by "teor". Fixes part of bug
18345 16069; bugfix on 0.2.4.7-alpha.
18347 o Minor bugfixes (authority):
18348 - Don't assign "HSDir" to a router if it isn't Valid and Running.
18349 Fixes bug 16524; bugfix on 0.2.7.2-alpha.
18350 - Downgrade log messages about Ed25519 key issues if they are in old
18351 cached router descriptors. Fixes part of bug 16286; bugfix
18353 - When we find an Ed25519 key issue in a cached descriptor, stop
18354 saying the descriptor was just "uploaded". Fixes another part of
18355 bug 16286; bugfix on 0.2.7.2-alpha.
18357 o Minor bugfixes (control port):
18358 - Repair a warning and a spurious result when getting the maximum
18359 number of file descriptors from the controller. Fixes bug 16697;
18360 bugfix on 0.2.7.2-alpha.
18362 o Minor bugfixes (correctness):
18363 - When calling channel_free_list(), avoid calling smartlist_remove()
18364 while inside a FOREACH loop. This partially reverts commit
18365 17356fe7fd96af where the correct SMARTLIST_DEL_CURRENT was
18366 incorrectly removed. Fixes bug 16924; bugfix on 0.2.4.4-alpha.
18368 o Minor bugfixes (documentation):
18369 - Advise users on how to configure separate IPv4 and IPv6 exit
18370 policies in the manpage and sample torrcs. Related to ticket 16069.
18371 - Fix the usage message of tor-resolve(1) so that it no longer lists
18372 the removed -F option. Fixes bug 16913; bugfix on 0.2.2.28-beta.
18373 - Fix an error in the manual page and comments for
18374 TestingDirAuthVoteHSDir[IsStrict], which suggested that a HSDir
18375 required "ORPort connectivity". While this is true, it is in no
18376 way unique to the HSDir flag. Of all the flags, only HSDirs need a
18377 DirPort configured in order for the authorities to assign that
18378 particular flag. Patch by "teor". Fixed as part of 14882; bugfix
18381 o Minor bugfixes (Ed25519):
18382 - Fix a memory leak when reading router descriptors with expired
18383 Ed25519 certificates. Fixes bug 16539; bugfix on 0.2.7.2-alpha.
18385 o Minor bugfixes (linux seccomp2 sandbox):
18386 - Allow bridge authorities to run correctly under the seccomp2
18387 sandbox. Fixes bug 16964; bugfix on 0.2.5.1-alpha.
18388 - Allow routers with ed25519 keys to run correctly under the
18389 seccomp2 sandbox. Fixes bug 16965; bugfix on 0.2.7.2-alpha.
18391 o Minor bugfixes (open file limit):
18392 - Fix set_max_file_descriptors() to set by default the max open file
18393 limit to the current limit when setrlimit() fails. Fixes bug
18394 16274; bugfix on 0.2.0.10-alpha. Patch by dgoulet.
18396 o Minor bugfixes (portability):
18397 - Try harder to normalize the exit status of the Tor process to the
18398 standard-provided range. Fixes bug 16975; bugfix on every version
18400 - Check correctly for Windows socket errors in the workqueue
18401 backend. Fixes bug 16741; bugfix on 0.2.6.3-alpha.
18402 - Fix the behavior of crypto_rand_time_range() when told to consider
18403 times before 1970. (These times were possible when running in a
18404 simulated network environment where time()'s output starts at
18405 zero.) Fixes bug 16980; bugfix on 0.2.7.1-alpha.
18406 - Restore correct operation of TLS client-cipher detection on
18407 OpenSSL 1.1. Fixes bug 14047; bugfix on 0.2.7.2-alpha.
18409 o Minor bugfixes (relay):
18410 - Ensure that worker threads actually exit when a fatal error or
18411 shutdown is indicated. This fix doesn't currently affect the
18412 behavior of Tor, because Tor workers never indicates fatal error
18413 or shutdown except in the unit tests. Fixes bug 16868; bugfix
18415 - Unblock threads before releasing the work queue mutex to ensure
18416 predictable scheduling behavior. Fixes bug 16644; bugfix
18419 o Code simplification and refactoring:
18420 - Change the function that's called when we need to retry all
18421 downloads so that it only reschedules the downloads to happen
18422 immediately, rather than launching them all at once itself. This
18423 further simplifies Tor's callgraph.
18424 - Move some format-parsing functions out of crypto.c and
18425 crypto_curve25519.c into crypto_format.c and/or util_format.c.
18426 - Move the client-only parts of init_keys() into a separate
18427 function. Closes ticket 16763.
18428 - Simplify the microdesc_free() implementation so that it no longer
18429 appears (to code analysis tools) to potentially invoke a huge
18430 suite of other microdesc functions.
18431 - Simply the control graph further by deferring the inner body of
18432 directory_all_unreachable() into a callback. Closes ticket 16762.
18433 - Treat the loss of an owning controller as equivalent to a SIGTERM
18434 signal. This removes a tiny amount of duplicated code, and
18435 simplifies our callgraph. Closes ticket 16788.
18436 - When generating an event to send to the controller, we no longer
18437 put the event over the network immediately. Instead, we queue
18438 these events, and use a Libevent callback to deliver them. This
18439 change simplifies Tor's callgraph by reducing the number of
18440 functions from which all other Tor functions are reachable. Closes
18442 - Wrap Windows-only C files inside '#ifdef _WIN32' so that tools
18443 that try to scan or compile every file on Unix won't decide that
18445 - Remove the unused "nulterminate" argument from buf_pullup().
18448 - Recommend a 40 GB example AccountingMax in torrc.sample rather
18449 than a 4 GB max. Closes ticket 16742.
18450 - Include the TUNING document in our source tarball. It is referred
18451 to in the ChangeLog and an error message. Fixes bug 16929; bugfix
18455 - The internal pure-C tor-fw-helper tool is now removed from the Tor
18456 distribution, in favor of the pure-Go clone available from
18457 https://gitweb.torproject.org/tor-fw-helper.git/ . The libraries
18458 used by the C tor-fw-helper are not, in our opinion, very
18459 confidence- inspiring in their secure-programming techniques.
18460 Closes ticket 13338.
18461 - Remove the code that would try to aggressively flush controller
18462 connections while writing to them. This code was introduced in
18463 0.1.2.7-alpha, in order to keep output buffers from exceeding
18464 their limits. But there is no longer a maximum output buffer size,
18465 and flushing data in this way caused some undesirable recursions
18466 in our call graph. Closes ticket 16480.
18469 - Make "bridges+hs" the default test network. This tests almost all
18470 tor functionality during make test-network, while allowing tests
18471 to succeed on non-IPv6 systems. Requires chutney commit 396da92 in
18472 test-network-bridges-hs. Closes tickets 16945 (tor) and 16946
18473 (chutney). Patches by "teor".
18474 - Autodetect CHUTNEY_PATH if the chutney and Tor sources are side-
18475 by-side in the same parent directory. Closes ticket 16903. Patch
18477 - Use environment variables rather than autoconf substitutions to
18478 send variables from the build system to the test scripts. This
18479 change should be easier to maintain, and cause 'make distcheck' to
18480 work better than before. Fixes bug 17148.
18481 - Add a new set of callgraph analysis scripts that use clang to
18482 produce a list of which Tor functions are reachable from which
18483 other Tor functions. We're planning to use these to help simplify
18484 our code structure by identifying illogical dependencies.
18485 - Add new 'test-full' and 'test-full-online' targets to run all
18486 tests, including integration tests with stem and chutney.
18487 - Make the test-workqueue test work on Windows by initializing the
18488 network before we begin.
18489 - New make target (make test-network-all) to run multiple applicable
18490 chutney test cases. Patch from Teor; closes 16953.
18491 - Unit test dns_resolve(), dns_clip_ttl() and dns_get_expiry_ttl()
18492 functions in dns.c. Implements a portion of ticket 16831.
18493 - When building Tor with testing coverage enabled, run Chutney tests
18494 (if any) using the 'tor-cov' coverage binary.
18495 - When running test-network or test-stem, check for the absence of
18496 stem/chutney before doing any build operations.
18499 Changes in version 0.2.7.2-alpha - 2015-07-27
18500 This, the second alpha in the Tor 0.2.7 series, has a number of new
18501 features, including a way to manually pick the number of introduction
18502 points for hidden services, and the much stronger Ed25519 signing key
18503 algorithm for regular Tor relays (including support for encrypted
18504 offline identity keys in the new algorithm).
18506 Support for Ed25519 on relays is currently limited to signing router
18507 descriptors; later alphas in this series will extend Ed25519 key
18508 support to more parts of the Tor protocol.
18510 o Major features (Ed25519 identity keys, Proposal 220):
18511 - All relays now maintain a stronger identity key, using the Ed25519
18512 elliptic curve signature format. This master key is designed so
18513 that it can be kept offline. Relays also generate an online
18514 signing key, and a set of other Ed25519 keys and certificates.
18515 These are all automatically regenerated and rotated as needed.
18516 Implements part of ticket 12498.
18517 - Directory authorities now vote on Ed25519 identity keys along with
18518 RSA1024 keys. Implements part of ticket 12498.
18519 - Directory authorities track which Ed25519 identity keys have been
18520 used with which RSA1024 identity keys, and do not allow them to
18521 vary freely. Implements part of ticket 12498.
18522 - Microdescriptors now include Ed25519 identity keys. Implements
18523 part of ticket 12498.
18524 - Add support for offline encrypted Ed25519 master keys. To use this
18525 feature on your tor relay, run "tor --keygen" to make a new master
18526 key (or to make a new signing key if you already have a master
18527 key). Closes ticket 13642.
18529 o Major features (Hidden services):
18530 - Add the torrc option HiddenServiceNumIntroductionPoints, to
18531 specify a fixed number of introduction points. Its maximum value
18532 is 10 and default is 3. Using this option can increase a hidden
18533 service's reliability under load, at the cost of making it more
18534 visible that the hidden service is facing extra load. Closes
18536 - Remove the adaptive algorithm for choosing the number of
18537 introduction points, which used to change the number of
18538 introduction points (poorly) depending on the number of
18539 connections the HS sees. Closes ticket 4862.
18541 o Major features (onion key cross-certification):
18542 - Relay descriptors now include signatures of their own identity
18543 keys, made using the TAP and ntor onion keys. These signatures
18544 allow relays to prove ownership of their own onion keys. Because
18545 of this change, microdescriptors will no longer need to include
18546 RSA identity keys. Implements proposal 228; closes ticket 12499.
18548 o Major features (performance):
18549 - Improve the runtime speed of Ed25519 operations by using the
18550 public-domain Ed25519-donna by Andrew M. ("floodyberry").
18551 Implements ticket 16467.
18552 - Improve the runtime speed of the ntor handshake by using an
18553 optimized curve25519 basepoint scalarmult implementation from the
18554 public-domain Ed25519-donna by Andrew M. ("floodyberry"), based on
18555 ideas by Adam Langley. Implements ticket 9663.
18557 o Major bugfixes (client-side privacy, also in 0.2.6.9):
18558 - Properly separate out each SOCKSPort when applying stream
18559 isolation. The error occurred because each port's session group
18560 was being overwritten by a default value when the listener
18561 connection was initialized. Fixes bug 16247; bugfix on
18562 0.2.6.3-alpha. Patch by "jojelino".
18564 o Major bugfixes (hidden service clients, stability, also in 0.2.6.10):
18565 - Stop refusing to store updated hidden service descriptors on a
18566 client. This reverts commit 9407040c59218 (which indeed fixed bug
18567 14219, but introduced a major hidden service reachability
18568 regression detailed in bug 16381). This is a temporary fix since
18569 we can live with the minor issue in bug 14219 (it just results in
18570 some load on the network) but the regression of 16381 is too much
18571 of a setback. First-round fix for bug 16381; bugfix
18574 o Major bugfixes (hidden services):
18575 - When cannibalizing a circuit for an introduction point, always
18576 extend to the chosen exit node (creating a 4 hop circuit).
18577 Previously Tor would use the current circuit exit node, which
18578 changed the original choice of introduction point, and could cause
18579 the hidden service to skip excluded introduction points or
18580 reconnect to a skipped introduction point. Fixes bug 16260; bugfix
18583 o Major bugfixes (open file limit):
18584 - The open file limit wasn't checked before calling
18585 tor_accept_socket_nonblocking(), which would make Tor exceed the
18586 limit. Now, before opening a new socket, Tor validates the open
18587 file limit just before, and if the max has been reached, return an
18588 error. Fixes bug 16288; bugfix on 0.1.1.1-alpha.
18590 o Major bugfixes (stability, also in 0.2.6.10):
18591 - Stop crashing with an assertion failure when parsing certain kinds
18592 of malformed or truncated microdescriptors. Fixes bug 16400;
18593 bugfix on 0.2.6.1-alpha. Found by "torkeln"; fix based on a patch
18594 by "cypherpunks_backup".
18595 - Stop random client-side assertion failures that could occur when
18596 connecting to a busy hidden service, or connecting to a hidden
18597 service while a NEWNYM is in progress. Fixes bug 16013; bugfix
18600 o Minor features (directory authorities, security, also in 0.2.6.9):
18601 - The HSDir flag given by authorities now requires the Stable flag.
18602 For the current network, this results in going from 2887 to 2806
18603 HSDirs. Also, it makes it harder for an attacker to launch a sybil
18604 attack by raising the effort for a relay to become Stable to
18605 require at the very least 7 days, while maintaining the 96 hours
18606 uptime requirement for HSDir. Implements ticket 8243.
18608 o Minor features (client):
18609 - Relax the validation of hostnames in SOCKS5 requests, allowing the
18610 character '_' to appear, in order to cope with domains observed in
18611 the wild that are serving non-RFC compliant records. Resolves
18613 - Relax the validation done to hostnames in SOCKS5 requests, and
18614 allow a single trailing '.' to cope with clients that pass FQDNs
18615 using that syntax to explicitly indicate that the domain name is
18616 fully-qualified. Fixes bug 16674; bugfix on 0.2.6.2-alpha.
18617 - Add GroupWritable and WorldWritable options to unix-socket based
18618 SocksPort and ControlPort options. These options apply to a single
18619 socket, and override {Control,Socks}SocketsGroupWritable. Closes
18622 o Minor features (control protocol):
18623 - Support network-liveness GETINFO key and NETWORK_LIVENESS event in
18624 the control protocol. Resolves ticket 15358.
18626 o Minor features (directory authorities):
18627 - Directory authorities no longer vote against the "Fast", "Stable",
18628 and "HSDir" flags just because they were going to vote against
18629 "Running": if the consensus turns out to be that the router was
18630 running, then the authority's vote should count. Patch from Peter
18631 Retzlaff; closes issue 8712.
18633 o Minor features (geoip, also in 0.2.6.10):
18634 - Update geoip to the June 3 2015 Maxmind GeoLite2 Country database.
18635 - Update geoip6 to the June 3 2015 Maxmind GeoLite2 Country database.
18637 o Minor features (hidden services):
18638 - Add the new options "HiddenServiceMaxStreams" and
18639 "HiddenServiceMaxStreamsCloseCircuit" to allow hidden services to
18640 limit the maximum number of simultaneous streams per circuit, and
18641 optionally tear down the circuit when the limit is exceeded. Part
18644 o Minor features (portability):
18645 - Use C99 variadic macros when the compiler is not GCC. This avoids
18646 failing compilations on MSVC, and fixes a log-file-based race
18647 condition in our old workarounds. Original patch from Gisle Vanem.
18649 o Minor bugfixes (compilation, also in 0.2.6.9):
18650 - Build with --enable-systemd correctly when libsystemd is
18651 installed, but systemd is not. Fixes bug 16164; bugfix on
18652 0.2.6.3-alpha. Patch from Peter Palfrader.
18654 o Minor bugfixes (controller):
18655 - Add the descriptor ID in each HS_DESC control event. It was
18656 missing, but specified in control-spec.txt. Fixes bug 15881;
18657 bugfix on 0.2.5.2-alpha.
18659 o Minor bugfixes (crypto error-handling, also in 0.2.6.10):
18660 - Check for failures from crypto_early_init, and refuse to continue.
18661 A previous typo meant that we could keep going with an
18662 uninitialized crypto library, and would have OpenSSL initialize
18663 its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
18664 when implementing ticket 4900. Patch by "teor".
18666 o Minor bugfixes (hidden services):
18667 - Fix a crash when reloading configuration while at least one
18668 configured and one ephemeral hidden service exists. Fixes bug
18669 16060; bugfix on 0.2.7.1-alpha.
18670 - Avoid crashing with a double-free bug when we create an ephemeral
18671 hidden service but adding it fails for some reason. Fixes bug
18672 16228; bugfix on 0.2.7.1-alpha.
18674 o Minor bugfixes (Linux seccomp2 sandbox):
18675 - Use the sandbox in tor_open_cloexec whether or not O_CLOEXEC is
18676 defined. Patch by "teor". Fixes bug 16515; bugfix on 0.2.3.1-alpha.
18678 o Minor bugfixes (Linux seccomp2 sandbox, also in 0.2.6.10):
18679 - Allow pipe() and pipe2() syscalls in the seccomp2 sandbox: we need
18680 these when eventfd2() support is missing. Fixes bug 16363; bugfix
18681 on 0.2.6.3-alpha. Patch from "teor".
18683 o Minor bugfixes (Linux seccomp2 sandbox, also in 0.2.6.9):
18684 - Fix sandboxing to work when running as a relay, by allowing the
18685 renaming of secret_id_key, and allowing the eventfd2 and futex
18686 syscalls. Fixes bug 16244; bugfix on 0.2.6.1-alpha. Patch by
18688 - Allow systemd connections to work with the Linux seccomp2 sandbox
18689 code. Fixes bug 16212; bugfix on 0.2.6.2-alpha. Patch by
18692 o Minor bugfixes (relay):
18693 - Fix a rarely-encountered memory leak when failing to initialize
18694 the thread pool. Fixes bug 16631; bugfix on 0.2.6.3-alpha. Patch
18695 from "cypherpunks".
18697 o Minor bugfixes (systemd):
18698 - Fix an accidental formatting error that broke the systemd
18699 configuration file. Fixes bug 16152; bugfix on 0.2.7.1-alpha.
18700 - Tor's systemd unit file no longer contains extraneous spaces.
18701 These spaces would sometimes confuse tools like deb-systemd-
18702 helper. Fixes bug 16162; bugfix on 0.2.5.5-alpha.
18704 o Minor bugfixes (tests):
18705 - Use the configured Python executable when running test-stem-full.
18706 Fixes bug 16470; bugfix on 0.2.7.1-alpha.
18708 o Minor bugfixes (tests, also in 0.2.6.9):
18709 - Fix a crash in the unit tests when built with MSVC2013. Fixes bug
18710 16030; bugfix on 0.2.6.2-alpha. Patch from "NewEraCracker".
18712 o Minor bugfixes (threads, comments):
18713 - Always initialize return value in compute_desc_id in rendcommon.c
18714 Patch by "teor". Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
18715 - Check for NULL values in getinfo_helper_onions(). Patch by "teor".
18716 Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
18717 - Remove undefined directive-in-macro in test_util_writepid clang
18718 3.7 complains that using a preprocessor directive inside a macro
18719 invocation in test_util_writepid in test_util.c is undefined.
18720 Patch by "teor". Fixes part of bug 16115; bugfix on 0.2.7.1-alpha.
18722 o Code simplification and refactoring:
18723 - Define WINVER and _WIN32_WINNT centrally, in orconfig.h, in order
18724 to ensure they remain consistent and visible everywhere.
18725 - Remove some vestigial workarounds for the MSVC6 compiler. We
18726 haven't supported that in ages.
18727 - The link authentication code has been refactored for better
18728 testability and reliability. It now uses code generated with the
18729 "trunnel" binary encoding generator, to reduce the risk of bugs
18730 due to programmer error. Done as part of ticket 12498.
18733 - Include a specific and (hopefully) accurate documentation of the
18734 torrc file's meta-format in doc/torrc_format.txt. This is mainly
18735 of interest to people writing programs to parse or generate torrc
18736 files. This document is not a commitment to long-term
18737 compatibility; some aspects of the current format are a bit
18738 ridiculous. Closes ticket 2325.
18740 o Removed features:
18741 - Tor no longer supports copies of OpenSSL that are missing support
18742 for Elliptic Curve Cryptography. (We began using ECC when
18743 available in 0.2.4.8-alpha, for more safe and efficient key
18744 negotiation.) In particular, support for at least one of P256 or
18745 P224 is now required, with manual configuration needed if only
18746 P224 is available. Resolves ticket 16140.
18747 - Tor no longer supports versions of OpenSSL before 1.0. (If you are
18748 on an operating system that has not upgraded to OpenSSL 1.0 or
18749 later, and you compile Tor from source, you will need to install a
18750 more recent OpenSSL to link Tor against.) These versions of
18751 OpenSSL are still supported by the OpenSSL, but the numerous
18752 cryptographic improvements in later OpenSSL releases makes them a
18753 clear choice. Resolves ticket 16034.
18754 - Remove the HidServDirectoryV2 option. Now all relays offer to
18755 store hidden service descriptors. Related to 16543.
18756 - Remove the VoteOnHidServDirectoriesV2 option, since all
18757 authorities have long set it to 1. Closes ticket 16543.
18760 - Document use of coverity, clang static analyzer, and clang dynamic
18761 undefined behavior and address sanitizers in doc/HACKING. Include
18762 detailed usage instructions in the blacklist. Patch by "teor".
18763 Closes ticket 15817.
18764 - The link authentication protocol code now has extensive tests.
18765 - The relay descriptor signature testing code now has
18767 - The test_workqueue program now runs faster, and is enabled by
18768 default as a part of "make check".
18769 - Now that OpenSSL has its own scrypt implementation, add an unit
18770 test that checks for interoperability between libscrypt_scrypt()
18771 and OpenSSL's EVP_PBE_scrypt() so that we could not use libscrypt
18772 and rely on EVP_PBE_scrypt() whenever possible. Resolves
18776 Changes in version 0.2.6.10 - 2015-07-12
18777 Tor version 0.2.6.10 fixes some significant stability and hidden
18778 service client bugs, bulletproofs the cryptography init process, and
18779 fixes a bug when using the sandbox code with some older versions of
18780 Linux. Everyone running an older version, especially an older version
18781 of 0.2.6, should upgrade.
18783 o Major bugfixes (hidden service clients, stability):
18784 - Stop refusing to store updated hidden service descriptors on a
18785 client. This reverts commit 9407040c59218 (which indeed fixed bug
18786 14219, but introduced a major hidden service reachability
18787 regression detailed in bug 16381). This is a temporary fix since
18788 we can live with the minor issue in bug 14219 (it just results in
18789 some load on the network) but the regression of 16381 is too much
18790 of a setback. First-round fix for bug 16381; bugfix
18793 o Major bugfixes (stability):
18794 - Stop crashing with an assertion failure when parsing certain kinds
18795 of malformed or truncated microdescriptors. Fixes bug 16400;
18796 bugfix on 0.2.6.1-alpha. Found by "torkeln"; fix based on a patch
18797 by "cypherpunks_backup".
18798 - Stop random client-side assertion failures that could occur when
18799 connecting to a busy hidden service, or connecting to a hidden
18800 service while a NEWNYM is in progress. Fixes bug 16013; bugfix
18803 o Minor features (geoip):
18804 - Update geoip to the June 3 2015 Maxmind GeoLite2 Country database.
18805 - Update geoip6 to the June 3 2015 Maxmind GeoLite2 Country database.
18807 o Minor bugfixes (crypto error-handling):
18808 - Check for failures from crypto_early_init, and refuse to continue.
18809 A previous typo meant that we could keep going with an
18810 uninitialized crypto library, and would have OpenSSL initialize
18811 its own PRNG. Fixes bug 16360; bugfix on 0.2.5.2-alpha, introduced
18812 when implementing ticket 4900. Patch by "teor".
18814 o Minor bugfixes (Linux seccomp2 sandbox):
18815 - Allow pipe() and pipe2() syscalls in the seccomp2 sandbox: we need
18816 these when eventfd2() support is missing. Fixes bug 16363; bugfix
18817 on 0.2.6.3-alpha. Patch from "teor".
18820 Changes in version 0.2.6.9 - 2015-06-11
18821 Tor 0.2.6.9 fixes a regression in the circuit isolation code, increases the
18822 requirements for receiving an HSDir flag, and addresses some other small
18823 bugs in the systemd and sandbox code. Clients using circuit isolation
18824 should upgrade; all directory authorities should upgrade.
18826 o Major bugfixes (client-side privacy):
18827 - Properly separate out each SOCKSPort when applying stream
18828 isolation. The error occurred because each port's session group was
18829 being overwritten by a default value when the listener connection
18830 was initialized. Fixes bug 16247; bugfix on 0.2.6.3-alpha. Patch
18833 o Minor feature (directory authorities, security):
18834 - The HSDir flag given by authorities now requires the Stable flag.
18835 For the current network, this results in going from 2887 to 2806
18836 HSDirs. Also, it makes it harder for an attacker to launch a sybil
18837 attack by raising the effort for a relay to become Stable which
18838 takes at the very least 7 days to do so and by keeping the 96
18839 hours uptime requirement for HSDir. Implements ticket 8243.
18841 o Minor bugfixes (compilation):
18842 - Build with --enable-systemd correctly when libsystemd is
18843 installed, but systemd is not. Fixes bug 16164; bugfix on
18844 0.2.6.3-alpha. Patch from Peter Palfrader.
18846 o Minor bugfixes (Linux seccomp2 sandbox):
18847 - Fix sandboxing to work when running as a relaymby renaming of
18848 secret_id_key, and allowing the eventfd2 and futex syscalls. Fixes
18849 bug 16244; bugfix on 0.2.6.1-alpha. Patch by Peter Palfrader.
18850 - Allow systemd connections to work with the Linux seccomp2 sandbox
18851 code. Fixes bug 16212; bugfix on 0.2.6.2-alpha. Patch by
18854 o Minor bugfixes (tests):
18855 - Fix a crash in the unit tests when built with MSVC2013. Fixes bug
18856 16030; bugfix on 0.2.6.2-alpha. Patch from "NewEraCracker".
18859 Changes in version 0.2.6.8 - 2015-05-21
18860 Tor 0.2.6.8 fixes a bit of dodgy code in parsing INTRODUCE2 cells, and
18861 fixes an authority-side bug in assigning the HSDir flag. All directory
18862 authorities should upgrade.
18864 o Major bugfixes (hidden services, backport from 0.2.7.1-alpha):
18865 - Revert commit that made directory authorities assign the HSDir
18866 flag to relays without a DirPort; this was bad because such relays
18867 can't handle BEGIN_DIR cells. Fixes bug 15850; bugfix
18870 o Minor bugfixes (hidden service, backport from 0.2.7.1-alpha):
18871 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
18872 a client authorized hidden service. Fixes bug 15823; bugfix
18875 o Minor features (geoip):
18876 - Update geoip to the April 8 2015 Maxmind GeoLite2 Country database.
18877 - Update geoip6 to the April 8 2015 Maxmind GeoLite2
18881 Changes in version 0.2.7.1-alpha - 2015-05-12
18882 Tor 0.2.7.1-alpha is the first alpha release in its series. It
18883 includes numerous small features and bugfixes against previous Tor
18884 versions, and numerous small infrastructure improvements. The most
18885 notable features are several new ways for controllers to interact with
18886 the hidden services subsystem.
18888 o New system requirements:
18889 - Tor no longer includes workarounds to support Libevent versions
18890 before 1.3e. Libevent 2.0 or later is recommended. Closes
18893 o Major features (controller):
18894 - Add the ADD_ONION and DEL_ONION commands that allow the creation
18895 and management of hidden services via the controller. Closes
18897 - New "GETINFO onions/current" and "GETINFO onions/detached"
18898 commands to get information about hidden services created via the
18899 controller. Part of ticket 6411.
18900 - New HSFETCH command to launch a request for a hidden service
18901 descriptor. Closes ticket 14847.
18902 - New HSPOST command to upload a hidden service descriptor. Closes
18903 ticket 3523. Patch by "DonnchaC".
18905 o Major bugfixes (hidden services):
18906 - Revert commit that made directory authorities assign the HSDir
18907 flag to relays without a DirPort; this was bad because such relays
18908 can't handle BEGIN_DIR cells. Fixes bug 15850; bugfix
18911 o Minor features (clock-jump tolerance):
18912 - Recover better when our clock jumps back many hours, like might
18913 happen for Tails or Whonix users who start with a very wrong
18914 hardware clock, use Tor to discover a more accurate time, and then
18915 fix their clock. Resolves part of ticket 8766.
18917 o Minor features (command-line interface):
18918 - Make --hash-password imply --hush to prevent unnecessary noise.
18919 Closes ticket 15542. Patch from "cypherpunks".
18920 - Print a warning whenever we find a relative file path being used
18921 as torrc option. Resolves issue 14018.
18923 o Minor features (controller):
18924 - Add DirAuthority lines for default directory authorities to the
18925 output of the "GETINFO config/defaults" command if not already
18926 present. Implements ticket 14840.
18927 - Controllers can now use "GETINFO hs/client/desc/id/..." to
18928 retrieve items from the client's hidden service descriptor cache.
18929 Closes ticket 14845.
18930 - Implement a new controller command "GETINFO status/fresh-relay-
18931 descs" to fetch a descriptor/extrainfo pair that was generated on
18932 demand just for the controller's use. Implements ticket 14784.
18934 o Minor features (DoS-resistance):
18935 - Make it harder for attackers to overload hidden services with
18936 introductions, by blocking multiple introduction requests on the
18937 same circuit. Resolves ticket 15515.
18939 o Minor features (geoip):
18940 - Update geoip to the April 8 2015 Maxmind GeoLite2 Country database.
18941 - Update geoip6 to the April 8 2015 Maxmind GeoLite2
18944 o Minor features (HS popularity countermeasure):
18945 - To avoid leaking HS popularity, don't cycle the introduction point
18946 when we've handled a fixed number of INTRODUCE2 cells but instead
18947 cycle it when a random number of introductions is reached, thus
18948 making it more difficult for an attacker to find out the amount of
18949 clients that have used the introduction point for a specific HS.
18950 Closes ticket 15745.
18952 o Minor features (logging):
18953 - Include the Tor version in all LD_BUG log messages, since people
18954 tend to cut and paste those into the bugtracker. Implements
18957 o Minor features (pluggable transports):
18958 - When launching managed pluggable transports on Linux systems,
18959 attempt to have the kernel deliver a SIGTERM on tor exit if the
18960 pluggable transport process is still running. Resolves
18962 - When launching managed pluggable transports, setup a valid open
18963 stdin in the child process that can be used to detect if tor has
18964 terminated. The "TOR_PT_EXIT_ON_STDIN_CLOSE" environment variable
18965 can be used by implementations to detect this new behavior.
18966 Resolves ticket 15435.
18968 o Minor features (testing):
18969 - Add a test to verify that the compiler does not eliminate our
18970 memwipe() implementation. Closes ticket 15377.
18971 - Add make rule `check-changes` to verify the format of changes
18972 files. Closes ticket 15180.
18973 - Add unit tests for control_event_is_interesting(). Add a compile-
18974 time check that the number of events doesn't exceed the capacity
18975 of control_event_t.event_mask. Closes ticket 15431, checks for
18976 bugs similar to 13085. Patch by "teor".
18977 - Command-line argument tests moved to Stem. Resolves ticket 14806.
18978 - Integrate the ntor, backtrace, and zero-length keys tests into the
18979 automake test suite. Closes ticket 15344.
18980 - Remove assertions during builds to determine Tor's test coverage.
18981 We don't want to trigger these even in assertions, so including
18982 them artificially makes our branch coverage look worse than it is.
18983 This patch provides the new test-stem-full and coverage-html-full
18984 configure options. Implements ticket 15400.
18986 o Minor bugfixes (build):
18987 - Improve out-of-tree builds by making non-standard rules work and
18988 clean up additional files and directories. Fixes bug 15053; bugfix
18991 o Minor bugfixes (command-line interface):
18992 - When "--quiet" is provided along with "--validate-config", do not
18993 write anything to stdout on success. Fixes bug 14994; bugfix
18995 - When complaining about bad arguments to "--dump-config", use
18996 stderr, not stdout.
18998 o Minor bugfixes (configuration, unit tests):
18999 - Only add the default fallback directories when the DirAuthorities,
19000 AlternateDirAuthority, and FallbackDir directory config options
19001 are set to their defaults. The default fallback directory list is
19002 currently empty, this fix will only change tor's behavior when it
19003 has default fallback directories. Includes unit tests for
19004 consider_adding_dir_servers(). Fixes bug 15642; bugfix on
19005 90f6071d8dc0 in 0.2.4.7-alpha. Patch by "teor".
19007 o Minor bugfixes (correctness):
19008 - For correctness, avoid modifying a constant string in
19009 handle_control_postdescriptor. Fixes bug 15546; bugfix
19011 - Remove side-effects from tor_assert() calls. This was harmless,
19012 because we never disable assertions, but it is bad style and
19013 unnecessary. Fixes bug 15211; bugfix on 0.2.5.5, 0.2.2.36,
19016 o Minor bugfixes (hidden service):
19017 - Fix an out-of-bounds read when parsing invalid INTRODUCE2 cells on
19018 a client authorized hidden service. Fixes bug 15823; bugfix
19020 - Remove an extraneous newline character from the end of hidden
19021 service descriptors. Fixes bug 15296; bugfix on 0.2.0.10-alpha.
19023 o Minor bugfixes (interface):
19024 - Print usage information for --dump-config when it is used without
19025 an argument. Also, fix the error message to use different wording
19026 and add newline at the end. Fixes bug 15541; bugfix
19029 o Minor bugfixes (logs):
19030 - When building Tor under Clang, do not include an extra set of
19031 parentheses in log messages that include function names. Fixes bug
19032 15269; bugfix on every released version of Tor when compiled with
19033 recent enough Clang.
19035 o Minor bugfixes (network):
19036 - When attempting to use fallback technique for network interface
19037 lookup, disregard loopback and multicast addresses since they are
19038 unsuitable for public communications.
19040 o Minor bugfixes (statistics):
19041 - Disregard the ConnDirectionStatistics torrc options when Tor is
19042 not a relay since in that mode of operation no sensible data is
19043 being collected and because Tor might run into measurement hiccups
19044 when running as a client for some time, then becoming a relay.
19045 Fixes bug 15604; bugfix on 0.2.2.35.
19047 o Minor bugfixes (test networks):
19048 - When self-testing reachability, use ExtendAllowPrivateAddresses to
19049 determine if local/private addresses imply reachability. The
19050 previous fix used TestingTorNetwork, which implies
19051 ExtendAllowPrivateAddresses, but this excluded rare configurations
19052 where ExtendAllowPrivateAddresses is set but TestingTorNetwork is
19053 not. Fixes bug 15771; bugfix on 0.2.6.1-alpha. Patch by "teor",
19054 issue discovered by CJ Ess.
19056 o Minor bugfixes (testing):
19057 - Check for matching value in server response in ntor_ref.py. Fixes
19058 bug 15591; bugfix on 0.2.4.8-alpha. Reported and fixed
19060 - Set the severity correctly when testing
19061 get_interface_addresses_ifaddrs() and
19062 get_interface_addresses_win32(), so that the tests fail gracefully
19063 instead of triggering an assertion. Fixes bug 15759; bugfix on
19064 0.2.6.3-alpha. Reported by Nicolas Derive.
19066 o Code simplification and refactoring:
19067 - Move the hacky fallback code out of get_interface_address6() into
19068 separate function and get it covered with unit-tests. Resolves
19070 - Refactor hidden service client-side cache lookup to intelligently
19071 report its various failure cases, and disentangle failure cases
19072 involving a lack of introduction points. Closes ticket 14391.
19073 - Use our own Base64 encoder instead of OpenSSL's, to allow more
19074 control over the output. Part of ticket 15652.
19077 - Improve the descriptions of statistics-related torrc options in
19078 the manpage to describe rationale and possible uses cases. Fixes
19080 - Improve the layout and formatting of ./configure --help messages.
19081 Closes ticket 15024. Patch from "cypherpunks".
19082 - Standardize on the term "server descriptor" in the manual page.
19083 Previously, we had used "router descriptor", "server descriptor",
19084 and "relay descriptor" interchangeably. Part of ticket 14987.
19087 - Remove `USE_OPENSSL_BASE64` and the corresponding fallback code
19088 and always use the internal Base64 decoder. The internal decoder
19089 has been part of tor since 0.2.0.10-alpha, and no one should
19090 be using the OpenSSL one. Part of ticket 15652.
19091 - Remove the 'tor_strclear()' function; use memwipe() instead.
19092 Closes ticket 14922.
19094 o Removed features:
19095 - Remove the (seldom-used) DynamicDHGroups feature. For anti-
19096 fingerprinting we now recommend pluggable transports; for forward-
19097 secrecy in TLS, we now use the P-256 group. Closes ticket 13736.
19098 - Remove the undocumented "--digests" command-line option. It
19099 complicated our build process, caused subtle build issues on
19100 multiple platforms, and is now redundant since we started
19101 including git version identifiers. Closes ticket 14742.
19102 - Tor no longer contains checks for ancient directory cache versions
19103 that didn't know about microdescriptors.
19104 - Tor no longer contains workarounds for stat files generated by
19105 super-old versions of Tor that didn't choose guards sensibly.
19108 Changes in version 0.2.4.27 - 2015-04-06
19109 Tor 0.2.4.27 backports two fixes from 0.2.6.7 for security issues that
19110 could be used by an attacker to crash hidden services, or crash clients
19111 visiting hidden services. Hidden services should upgrade as soon as
19112 possible; clients should upgrade whenever packages become available.
19114 This release also backports a simple improvement to make hidden
19115 services a bit less vulnerable to denial-of-service attacks.
19117 o Major bugfixes (security, hidden service):
19118 - Fix an issue that would allow a malicious client to trigger an
19119 assertion failure and halt a hidden service. Fixes bug 15600;
19120 bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
19121 - Fix a bug that could cause a client to crash with an assertion
19122 failure when parsing a malformed hidden service descriptor. Fixes
19123 bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
19125 o Minor features (DoS-resistance, hidden service):
19126 - Introduction points no longer allow multiple INTRODUCE1 cells to
19127 arrive on the same circuit. This should make it more expensive for
19128 attackers to overwhelm hidden services with introductions.
19129 Resolves ticket 15515.
19132 Changes in version 0.2.5.12 - 2015-04-06
19133 Tor 0.2.5.12 backports two fixes from 0.2.6.7 for security issues that
19134 could be used by an attacker to crash hidden services, or crash clients
19135 visiting hidden services. Hidden services should upgrade as soon as
19136 possible; clients should upgrade whenever packages become available.
19138 This release also backports a simple improvement to make hidden
19139 services a bit less vulnerable to denial-of-service attacks.
19141 o Major bugfixes (security, hidden service):
19142 - Fix an issue that would allow a malicious client to trigger an
19143 assertion failure and halt a hidden service. Fixes bug 15600;
19144 bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
19145 - Fix a bug that could cause a client to crash with an assertion
19146 failure when parsing a malformed hidden service descriptor. Fixes
19147 bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
19149 o Minor features (DoS-resistance, hidden service):
19150 - Introduction points no longer allow multiple INTRODUCE1 cells to
19151 arrive on the same circuit. This should make it more expensive for
19152 attackers to overwhelm hidden services with introductions.
19153 Resolves ticket 15515.
19156 Changes in version 0.2.6.7 - 2015-04-06
19157 Tor 0.2.6.7 fixes two security issues that could be used by an
19158 attacker to crash hidden services, or crash clients visiting hidden
19159 services. Hidden services should upgrade as soon as possible; clients
19160 should upgrade whenever packages become available.
19162 This release also contains two simple improvements to make hidden
19163 services a bit less vulnerable to denial-of-service attacks.
19165 o Major bugfixes (security, hidden service):
19166 - Fix an issue that would allow a malicious client to trigger an
19167 assertion failure and halt a hidden service. Fixes bug 15600;
19168 bugfix on 0.2.1.6-alpha. Reported by "disgleirio".
19169 - Fix a bug that could cause a client to crash with an assertion
19170 failure when parsing a malformed hidden service descriptor. Fixes
19171 bug 15601; bugfix on 0.2.1.5-alpha. Found by "DonnchaC".
19173 o Minor features (DoS-resistance, hidden service):
19174 - Introduction points no longer allow multiple INTRODUCE1 cells to
19175 arrive on the same circuit. This should make it more expensive for
19176 attackers to overwhelm hidden services with introductions.
19177 Resolves ticket 15515.
19178 - Decrease the amount of reattempts that a hidden service performs
19179 when its rendezvous circuits fail. This reduces the computational
19180 cost for running a hidden service under heavy load. Resolves
19184 Changes in version 0.2.6.6 - 2015-03-24
19185 Tor 0.2.6.6 is the first stable release in the 0.2.6 series.
19187 It adds numerous safety, security, correctness, and performance
19188 improvements. Client programs can be configured to use more kinds of
19189 sockets, AutomapHosts works better, the multithreading backend is
19190 improved, cell transmission is refactored, test coverage is much
19191 higher, more denial-of-service attacks are handled, guard selection is
19192 improved to handle long-term guards better, pluggable transports
19193 should work a bit better, and some annoying hidden service performance
19194 bugs should be addressed.
19196 o Minor bugfixes (portability):
19197 - Use the correct datatype in the SipHash-2-4 function to prevent
19198 compilers from assuming any sort of alignment. Fixes bug 15436;
19199 bugfix on 0.2.5.3-alpha.
19201 Changes in version 0.2.6.5-rc - 2015-03-18
19202 Tor 0.2.6.5-rc is the second and (hopefully) last release candidate in
19203 the 0.2.6. It fixes a small number of bugs found in 0.2.6.4-rc.
19205 o Major bugfixes (client):
19206 - Avoid crashing when making certain configuration option changes on
19207 clients. Fixes bug 15245; bugfix on 0.2.6.3-alpha. Reported
19210 o Major bugfixes (pluggable transports):
19211 - Initialize the extended OR Port authentication cookie before
19212 launching pluggable transports. This prevents a race condition
19213 that occurred when server-side pluggable transports would cache the
19214 authentication cookie before it has been (re)generated. Fixes bug
19215 15240; bugfix on 0.2.5.1-alpha.
19217 o Major bugfixes (portability):
19218 - Do not crash on startup when running on Solaris. Fixes a bug
19219 related to our fix for 9495; bugfix on 0.2.6.1-alpha. Reported
19222 o Minor features (heartbeat):
19223 - On relays, report how many connections we negotiated using each
19224 version of the Tor link protocols. This information will let us
19225 know if removing support for very old versions of the Tor
19226 protocols is harming the network. Closes ticket 15212.
19228 o Code simplification and refactoring:
19229 - Refactor main loop to extract the 'loop' part. This makes it
19230 easier to run Tor under Shadow. Closes ticket 15176.
19233 Changes in version 0.2.5.11 - 2015-03-17
19234 Tor 0.2.5.11 is the second stable release in the 0.2.5 series.
19236 It backports several bugfixes from the 0.2.6 branch, including a
19237 couple of medium-level security fixes for relays and exit nodes.
19238 It also updates the list of directory authorities.
19240 o Directory authority changes:
19241 - Remove turtles as a directory authority.
19242 - Add longclaw as a new (v3) directory authority. This implements
19243 ticket 13296. This keeps the directory authority count at 9.
19244 - The directory authority Faravahar has a new IP address. This
19245 closes ticket 14487.
19247 o Major bugfixes (crash, OSX, security):
19248 - Fix a remote denial-of-service opportunity caused by a bug in
19249 OSX's _strlcat_chk() function. Fixes bug 15205; bug first appeared
19252 o Major bugfixes (relay, stability, possible security):
19253 - Fix a bug that could lead to a relay crashing with an assertion
19254 failure if a buffer of exactly the wrong layout was passed to
19255 buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
19256 0.2.0.10-alpha. Patch from 'cypherpunks'.
19257 - Do not assert if the 'data' pointer on a buffer is advanced to the
19258 very end of the buffer; log a BUG message instead. Only assert if
19259 it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
19261 o Major bugfixes (exit node stability):
19262 - Fix an assertion failure that could occur under high DNS load.
19263 Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
19264 diagnosed and fixed by "cypherpunks".
19266 o Major bugfixes (Linux seccomp2 sandbox):
19267 - Upon receiving sighup with the seccomp2 sandbox enabled, do not
19268 crash during attempts to call wait4. Fixes bug 15088; bugfix on
19269 0.2.5.1-alpha. Patch from "sanic".
19271 o Minor features (controller):
19272 - New "GETINFO bw-event-cache" to get information about recent
19273 bandwidth events. Closes ticket 14128. Useful for controllers to
19274 get recent bandwidth history after the fix for ticket 13988.
19276 o Minor features (geoip):
19277 - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
19278 - Update geoip6 to the March 3 2015 Maxmind GeoLite2
19281 o Minor bugfixes (client, automapping):
19282 - Avoid crashing on torrc lines for VirtualAddrNetworkIPv[4|6] when
19283 no value follows the option. Fixes bug 14142; bugfix on
19284 0.2.4.7-alpha. Patch by "teor".
19285 - Fix a memory leak when using AutomapHostsOnResolve. Fixes bug
19286 14195; bugfix on 0.1.0.1-rc.
19288 o Minor bugfixes (compilation):
19289 - Build without warnings with the stock OpenSSL srtp.h header, which
19290 has a duplicate declaration of SSL_get_selected_srtp_profile().
19291 Fixes bug 14220; this is OpenSSL's bug, not ours.
19293 o Minor bugfixes (directory authority):
19294 - Allow directory authorities to fetch more data from one another if
19295 they find themselves missing lots of votes. Previously, they had
19296 been bumping against the 10 MB queued data limit. Fixes bug 14261;
19297 bugfix on 0.1.2.5-alpha.
19298 - Enlarge the buffer to read bwauth generated files to avoid an
19299 issue when parsing the file in dirserv_read_measured_bandwidths().
19300 Fixes bug 14125; bugfix on 0.2.2.1-alpha.
19302 o Minor bugfixes (statistics):
19303 - Increase period over which bandwidth observations are aggregated
19304 from 15 minutes to 4 hours. Fixes bug 13988; bugfix on 0.0.8pre1.
19306 o Minor bugfixes (preventative security, C safety):
19307 - When reading a hexadecimal, base-32, or base-64 encoded value from
19308 a string, always overwrite the whole output buffer. This prevents
19309 some bugs where we would look at (but fortunately, not reveal)
19310 uninitialized memory on the stack. Fixes bug 14013; bugfix on all
19314 Changes in version 0.2.4.26 - 2015-03-17
19315 Tor 0.2.4.26 includes an updated list of directory authorities. It
19316 also backports a couple of stability and security bugfixes from 0.2.5
19319 o Directory authority changes:
19320 - Remove turtles as a directory authority.
19321 - Add longclaw as a new (v3) directory authority. This implements
19322 ticket 13296. This keeps the directory authority count at 9.
19323 - The directory authority Faravahar has a new IP address. This
19324 closes ticket 14487.
19326 o Major bugfixes (exit node stability, also in 0.2.6.3-alpha):
19327 - Fix an assertion failure that could occur under high DNS load.
19328 Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
19329 diagnosed and fixed by "cypherpunks".
19331 o Major bugfixes (relay, stability, possible security, also in 0.2.6.4-rc):
19332 - Fix a bug that could lead to a relay crashing with an assertion
19333 failure if a buffer of exactly the wrong layout was passed to
19334 buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
19335 0.2.0.10-alpha. Patch from 'cypherpunks'.
19336 - Do not assert if the 'data' pointer on a buffer is advanced to the
19337 very end of the buffer; log a BUG message instead. Only assert if
19338 it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
19340 o Minor features (geoip):
19341 - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
19342 - Update geoip6 to the March 3 2015 Maxmind GeoLite2
19345 Changes in version 0.2.6.4-rc - 2015-03-09
19346 Tor 0.2.6.4-alpha fixes an issue in the directory code that an
19347 attacker might be able to use in order to crash certain Tor
19348 directories. It also resolves some minor issues left over from, or
19349 introduced in, Tor 0.2.6.3-alpha or earlier.
19351 o Major bugfixes (crash, OSX, security):
19352 - Fix a remote denial-of-service opportunity caused by a bug in
19353 OSX's _strlcat_chk() function. Fixes bug 15205; bug first appeared
19356 o Major bugfixes (relay, stability, possible security):
19357 - Fix a bug that could lead to a relay crashing with an assertion
19358 failure if a buffer of exactly the wrong layout is passed to
19359 buf_pullup() at exactly the wrong time. Fixes bug 15083; bugfix on
19360 0.2.0.10-alpha. Patch from "cypherpunks".
19361 - Do not assert if the 'data' pointer on a buffer is advanced to the
19362 very end of the buffer; log a BUG message instead. Only assert if
19363 it is past that point. Fixes bug 15083; bugfix on 0.2.0.10-alpha.
19365 o Major bugfixes (FreeBSD IPFW transparent proxy):
19366 - Fix address detection with FreeBSD transparent proxies, when
19367 "TransProxyType ipfw" is in use. Fixes bug 15064; bugfix
19370 o Major bugfixes (Linux seccomp2 sandbox):
19371 - Pass IPPROTO_TCP rather than 0 to socket(), so that the Linux
19372 seccomp2 sandbox doesn't fail. Fixes bug 14989; bugfix
19374 - Allow AF_UNIX hidden services to be used with the seccomp2
19375 sandbox. Fixes bug 15003; bugfix on 0.2.6.3-alpha.
19376 - Upon receiving sighup with the seccomp2 sandbox enabled, do not
19377 crash during attempts to call wait4. Fixes bug 15088; bugfix on
19378 0.2.5.1-alpha. Patch from "sanic".
19380 o Minor features (controller):
19381 - Messages about problems in the bootstrap process now include
19382 information about the server we were trying to connect to when we
19383 noticed the problem. Closes ticket 15006.
19385 o Minor features (geoip):
19386 - Update geoip to the March 3 2015 Maxmind GeoLite2 Country database.
19387 - Update geoip6 to the March 3 2015 Maxmind GeoLite2
19390 o Minor features (logs):
19391 - Quiet some log messages in the heartbeat and at startup. Closes
19394 o Minor bugfixes (certificate handling):
19395 - If an authority operator accidentally makes a signing certificate
19396 with a future publication time, do not discard its real signing
19397 certificates. Fixes bug 11457; bugfix on 0.2.0.3-alpha.
19398 - Remove any old authority certificates that have been superseded
19399 for at least two days. Previously, we would keep superseded
19400 certificates until they expired, if they were published close in
19401 time to the certificate that superseded them. Fixes bug 11454;
19402 bugfix on 0.2.1.8-alpha.
19404 o Minor bugfixes (compilation):
19405 - Fix a compilation warning on s390. Fixes bug 14988; bugfix
19407 - Fix a compilation warning on FreeBSD. Fixes bug 15151; bugfix
19410 o Minor bugfixes (testing):
19411 - Fix endianness issues in unit test for resolve_my_address() to
19412 have it pass on big endian systems. Fixes bug 14980; bugfix on
19414 - Avoid a side-effect in a tor_assert() in the unit tests. Fixes bug
19415 15188; bugfix on 0.1.2.3-alpha. Patch from Tom van der Woerdt.
19416 - When running the new 'make test-stem' target, use the configured
19417 python binary. Fixes bug 15037; bugfix on 0.2.6.3-alpha. Patch
19418 from "cypherpunks".
19419 - When running the zero-length-keys tests, do not use the default
19420 torrc file. Fixes bug 15033; bugfix on 0.2.6.3-alpha. Reported
19423 o Directory authority IP change:
19424 - The directory authority Faravahar has a new IP address. This
19425 closes ticket 14487.
19428 - Remove some lingering dead code that once supported mempools.
19429 Mempools were disabled by default in 0.2.5, and removed entirely
19430 in 0.2.6.3-alpha. Closes more of ticket 14848; patch
19434 Changes in version 0.2.6.3-alpha - 2015-02-19
19435 Tor 0.2.6.3-alpha is the third (and hopefully final) alpha release in
19436 the 0.2.6.x series. It introduces support for more kinds of sockets,
19437 makes it harder to accidentally run an exit, improves our
19438 multithreading backend, incorporates several fixes for the
19439 AutomapHostsOnResolve option, and fixes numerous other bugs besides.
19441 If no major regressions or security holes are found in this version,
19442 the next version will be a release candidate.
19444 o Deprecated versions:
19445 - Tor relays older than 0.2.4.18-rc are no longer allowed to
19446 advertise themselves on the network. Closes ticket 13555.
19448 o Major features (security, unix domain sockets):
19449 - Allow SocksPort to be an AF_UNIX Unix Domain Socket. Now high risk
19450 applications can reach Tor without having to create AF_INET or
19451 AF_INET6 sockets, meaning they can completely disable their
19452 ability to make non-Tor network connections. To create a socket of
19453 this type, use "SocksPort unix:/path/to/socket". Implements
19455 - Support mapping hidden service virtual ports to AF_UNIX sockets.
19456 The syntax is "HiddenServicePort 80 unix:/path/to/socket".
19457 Implements ticket 11485.
19459 o Major features (changed defaults):
19460 - Prevent relay operators from unintentionally running exits: When a
19461 relay is configured as an exit node, we now warn the user unless
19462 the "ExitRelay" option is set to 1. We warn even more loudly if
19463 the relay is configured with the default exit policy, since this
19464 can indicate accidental misconfiguration. Setting "ExitRelay 0"
19465 stops Tor from running as an exit relay. Closes ticket 10067.
19467 o Major features (directory system):
19468 - When downloading server- or microdescriptors from a directory
19469 server, we no longer launch multiple simultaneous requests to the
19470 same server. This reduces load on the directory servers,
19471 especially when directory guards are in use. Closes ticket 9969.
19472 - When downloading server- or microdescriptors over a tunneled
19473 connection, do not limit the length of our requests to what the
19474 Squid proxy is willing to handle. Part of ticket 9969.
19475 - Authorities can now vote on the correct digests and latest
19476 versions for different software packages. This allows packages
19477 that include Tor to use the Tor authority system as a way to get
19478 notified of updates and their correct digests. Implements proposal
19479 227. Closes ticket 10395.
19481 o Major features (guards):
19482 - Introduce the Guardfraction feature to improves load balancing on
19483 guard nodes. Specifically, it aims to reduce the traffic gap that
19484 guard nodes experience when they first get the Guard flag. This is
19485 a required step if we want to increase the guard lifetime to 9
19486 months or greater. Closes ticket 9321.
19488 o Major features (performance):
19489 - Make the CPU worker implementation more efficient by avoiding the
19490 kernel and lengthening pipelines. The original implementation used
19491 sockets to transfer data from the main thread to the workers, and
19492 didn't allow any thread to be assigned more than a single piece of
19493 work at once. The new implementation avoids communications
19494 overhead by making requests in shared memory, avoiding kernel IO
19495 where possible, and keeping more requests in flight at once.
19496 Implements ticket 9682.
19498 o Major features (relay):
19499 - Raise the minimum acceptable configured bandwidth rate for bridges
19500 to 50 KiB/sec and for relays to 75 KiB/sec. (The old values were
19501 20 KiB/sec.) Closes ticket 13822.
19503 o Major bugfixes (exit node stability):
19504 - Fix an assertion failure that could occur under high DNS load.
19505 Fixes bug 14129; bugfix on Tor 0.0.7rc1. Found by "jowr";
19506 diagnosed and fixed by "cypherpunks".
19508 o Major bugfixes (mixed relay-client operation):
19509 - When running as a relay and client at the same time (not
19510 recommended), if we decide not to use a new guard because we want
19511 to retry older guards, only close the locally-originating circuits
19512 passing through that guard. Previously we would close all the
19513 circuits through that guard. Fixes bug 9819; bugfix on
19514 0.2.1.1-alpha. Reported by "skruffy".
19516 o Minor features (build):
19517 - New --disable-system-torrc compile-time option to prevent Tor from
19518 looking for the system-wide torrc or torrc-defaults files.
19519 Resolves ticket 13037.
19521 o Minor features (controller):
19522 - Include SOCKS_USERNAME and SOCKS_PASSWORD values in controller
19523 events so controllers can observe circuit isolation inputs. Closes
19525 - ControlPort now supports the unix:/path/to/socket syntax as an
19526 alternative to the ControlSocket option, for consistency with
19527 SocksPort and HiddenServicePort. Closes ticket 14451.
19528 - New "GETINFO bw-event-cache" to get information about recent
19529 bandwidth events. Closes ticket 14128. Useful for controllers to
19530 get recent bandwidth history after the fix for ticket 13988.
19532 o Minor features (Denial of service resistance):
19533 - Count the total number of bytes used storing hidden service
19534 descriptors against the value of MaxMemInQueues. If we're low on
19535 memory, and more than 20% of our memory is used holding hidden
19536 service descriptors, free them until no more than 10% of our
19537 memory holds hidden service descriptors. Free the least recently
19538 fetched descriptors first. Resolves ticket 13806.
19539 - When we have recently been under memory pressure (over 3/4 of
19540 MaxMemInQueues is allocated), then allocate smaller zlib objects
19541 for small requests. Closes ticket 11791.
19543 o Minor features (geoip):
19544 - Update geoip and geoip6 files to the January 7 2015 Maxmind
19545 GeoLite2 Country database.
19547 o Minor features (guard nodes):
19548 - Reduce the time delay before saving guard status to disk from 10
19549 minutes to 30 seconds (or from one hour to 10 minutes if
19550 AvoidDiskWrites is set). Closes ticket 12485.
19552 o Minor features (hidden service):
19553 - Make Sybil attacks against hidden services harder by changing the
19554 minimum time required to get the HSDir flag from 25 hours up to 96
19555 hours. Addresses ticket 14149.
19556 - New option "HiddenServiceAllowUnknownPorts" to allow hidden
19557 services to disable the anti-scanning feature introduced in
19558 0.2.6.2-alpha. With this option not set, a connection to an
19559 unlisted port closes the circuit. With this option set, only a
19560 RELAY_DONE cell is sent. Closes ticket 14084.
19562 o Minor features (interface):
19563 - Implement "-f -" command-line option to read torrc configuration
19564 from standard input, if you don't want to store the torrc file in
19565 the file system. Implements feature 13865.
19567 o Minor features (logging):
19568 - Add a count of unique clients to the bridge heartbeat message.
19569 Resolves ticket 6852.
19570 - Suppress "router info incompatible with extra info" message when
19571 reading extrainfo documents from cache. (This message got loud
19572 around when we closed bug 9812 in 0.2.6.2-alpha.) Closes
19574 - Elevate hidden service authorized-client message from DEBUG to
19575 INFO. Closes ticket 14015.
19577 o Minor features (stability):
19578 - Add assertions in our hash-table iteration code to check for
19579 corrupted values that could cause infinite loops. Closes
19582 o Minor features (systemd):
19583 - Various improvements and modernizations in systemd hardening
19584 support. Closes ticket 13805. Patch from Craig Andrews.
19586 o Minor features (testing networks):
19587 - Drop the minimum RendPostPeriod on a testing network to 5 seconds,
19588 and the default on a testing network to 2 minutes. Drop the
19589 MIN_REND_INITIAL_POST_DELAY on a testing network to 5 seconds, but
19590 keep the default on a testing network at 30 seconds. This reduces
19591 HS bootstrap time to around 25 seconds. Also, change the default
19592 time in test-network.sh to match. Closes ticket 13401. Patch
19594 - Create TestingDirAuthVoteHSDir to correspond to
19595 TestingDirAuthVoteExit/Guard. Ensures that authorities vote the
19596 HSDir flag for the listed relays regardless of uptime or ORPort
19597 connectivity. Respects the value of VoteOnHidServDirectoriesV2.
19598 Partial implementation for ticket 14067. Patch by "teor".
19600 o Minor features (tor2web mode):
19601 - Introduce the config option Tor2webRendezvousPoints, which allows
19602 clients in Tor2webMode to select a specific Rendezvous Point to be
19603 used in HS circuits. This might allow better performance for
19604 Tor2Web nodes. Implements ticket 12844.
19606 o Minor bugfixes (client DNS):
19607 - Report the correct cached DNS expiration times on SOCKS port or in
19608 DNS replies. Previously, we would report everything as "never
19609 expires." Fixes bug 14193; bugfix on 0.2.3.17-beta.
19610 - Avoid a small memory leak when we find a cached answer for a
19611 reverse DNS lookup in a client-side DNS cache. (Remember, client-
19612 side DNS caching is off by default, and is not recommended.) Fixes
19613 bug 14259; bugfix on 0.2.0.1-alpha.
19615 o Minor bugfixes (client, automapping):
19616 - Avoid crashing on torrc lines for VirtualAddrNetworkIPv[4|6] when
19617 no value follows the option. Fixes bug 14142; bugfix on
19618 0.2.4.7-alpha. Patch by "teor".
19619 - Fix a memory leak when using AutomapHostsOnResolve. Fixes bug
19620 14195; bugfix on 0.1.0.1-rc.
19621 - Prevent changes to other options from removing the wildcard value
19622 "." from "AutomapHostsSuffixes". Fixes bug 12509; bugfix
19624 - Allow MapAddress and AutomapHostsOnResolve to work together when
19625 an address is mapped into another address type (like .onion) that
19626 must be automapped at resolve time. Fixes bug 7555; bugfix
19629 o Minor bugfixes (client, bridges):
19630 - When we are using bridges and we had a network connectivity
19631 problem, only retry connecting to our currently configured
19632 bridges, not all bridges we know about and remember using. Fixes
19633 bug 14216; bugfix on 0.2.2.17-alpha.
19635 o Minor bugfixes (client, IPv6):
19636 - Reject socks requests to literal IPv6 addresses when IPv6Traffic
19637 flag is not set; and not because the NoIPv4Traffic flag was set.
19638 Previously we'd looked at the NoIPv4Traffic flag for both types of
19639 literal addresses. Fixes bug 14280; bugfix on 0.2.4.7-alpha.
19641 o Minor bugfixes (compilation):
19642 - The address of an array in the middle of a structure will always
19643 be non-NULL. clang recognises this and complains. Disable the
19644 tautologous and redundant check to silence this warning. Fixes bug
19645 14001; bugfix on 0.2.1.2-alpha.
19646 - Avoid warnings when building with systemd 209 or later. Fixes bug
19647 14072; bugfix on 0.2.6.2-alpha. Patch from "h.venev".
19648 - Compile correctly with (unreleased) OpenSSL 1.1.0 headers.
19649 Addresses ticket 14188.
19650 - Build without warnings with the stock OpenSSL srtp.h header, which
19651 has a duplicate declaration of SSL_get_selected_srtp_profile().
19652 Fixes bug 14220; this is OpenSSL's bug, not ours.
19653 - Do not compile any code related to Tor2Web mode when Tor2Web mode
19654 is not enabled at compile time. Previously, this code was included
19655 in a disabled state. See discussion on ticket 12844.
19656 - Remove the --disable-threads configure option again. It was
19657 accidentally partially reintroduced in 29ac883606d6d. Fixes bug
19658 14819; bugfix on 0.2.6.2-alpha.
19660 o Minor bugfixes (controller):
19661 - Report "down" in response to the "GETINFO entry-guards" command
19662 when relays are down with an unreachable_since value. Previously,
19663 we would report "up". Fixes bug 14184; bugfix on 0.1.2.2-alpha.
19664 - Avoid crashing on a malformed EXTENDCIRCUIT command. Fixes bug
19665 14116; bugfix on 0.2.2.9-alpha.
19666 - Add a code for the END_CIRC_REASON_IP_NOW_REDUNDANT circuit close
19667 reason. Fixes bug 14207; bugfix on 0.2.6.2-alpha.
19669 o Minor bugfixes (directory authority):
19670 - Allow directory authorities to fetch more data from one another if
19671 they find themselves missing lots of votes. Previously, they had
19672 been bumping against the 10 MB queued data limit. Fixes bug 14261;
19673 bugfix on 0.1.2.5-alpha.
19674 - Do not attempt to download extrainfo documents which we will be
19675 unable to validate with a matching server descriptor. Fixes bug
19676 13762; bugfix on 0.2.0.1-alpha.
19677 - Fix a bug that was truncating AUTHDIR_NEWDESC events sent to the
19678 control port. Fixes bug 14953; bugfix on 0.2.0.1-alpha.
19679 - Enlarge the buffer to read bwauth generated files to avoid an
19680 issue when parsing the file in dirserv_read_measured_bandwidths().
19681 Fixes bug 14125; bugfix on 0.2.2.1-alpha.
19683 o Minor bugfixes (file handling):
19684 - Stop failing when key files are zero-length. Instead, generate new
19685 keys, and overwrite the empty key files. Fixes bug 13111; bugfix
19686 on all versions of Tor. Patch by "teor".
19687 - Stop generating a fresh .old RSA onion key file when the .old file
19688 is missing. Fixes part of 13111; bugfix on 0.0.6rc1.
19689 - Avoid overwriting .old key files with empty key files.
19690 - Skip loading zero-length extrainfo store, router store, stats,
19691 state, and key files.
19692 - Avoid crashing when trying to reload a torrc specified as a
19693 relative path with RunAsDaemon turned on. Fixes bug 13397; bugfix
19696 o Minor bugfixes (hidden services):
19697 - Close the introduction circuit when we have no more usable intro
19698 points, instead of waiting for it to time out. This also ensures
19699 that no follow-up HS descriptor fetch is triggered when the
19700 circuit eventually times out. Fixes bug 14224; bugfix on 0.0.6.
19701 - When fetching a hidden service descriptor for a down service that
19702 was recently up, do not keep refetching until we try the same
19703 replica twice in a row. Fixes bug 14219; bugfix on 0.2.0.10-alpha.
19704 - Successfully launch Tor with a nonexistent hidden service
19705 directory. Our fix for bug 13942 didn't catch this case. Fixes bug
19706 14106; bugfix on 0.2.6.2-alpha.
19708 o Minor bugfixes (logging):
19709 - Avoid crashing when there are more log domains than entries in
19710 domain_list. Bugfix on 0.2.3.1-alpha.
19711 - Add a string representation for LD_SCHED. Fixes bug 14740; bugfix
19713 - Don't log messages to stdout twice when starting up. Fixes bug
19714 13993; bugfix on 0.2.6.1-alpha.
19716 o Minor bugfixes (parsing):
19717 - Stop accepting milliseconds (or other junk) at the end of
19718 descriptor publication times. Fixes bug 9286; bugfix on 0.0.2pre25.
19719 - Support two-number and three-number version numbers correctly, in
19720 case we change the Tor versioning system in the future. Fixes bug
19721 13661; bugfix on 0.0.8pre1.
19723 o Minor bugfixes (path counting):
19724 - When deciding whether the consensus lists any exit nodes, count
19725 the number listed in the consensus, not the number we have
19726 descriptors for. Fixes part of bug 14918; bugfix on 0.2.6.2-alpha.
19727 - When deciding whether we have any exit nodes, only examine
19728 ExitNodes when the ExitNodes option is actually set. Fixes part of
19729 bug 14918; bugfix on 0.2.6.2-alpha.
19730 - Get rid of redundant and possibly scary warnings that we are
19731 missing directory information while we bootstrap. Fixes part of
19732 bug 14918; bugfix on 0.2.6.2-alpha.
19734 o Minor bugfixes (portability):
19735 - Fix the ioctl()-based network interface lookup code so that it
19736 will work on systems that have variable-length struct ifreq, for
19738 - Fix scheduler compilation on targets where char is unsigned. Fixes
19739 bug 14764; bugfix on 0.2.6.2-alpha. Reported by Christian Kujau.
19741 o Minor bugfixes (sandbox):
19742 - Allow glibc fatal errors to be sent to stderr before Tor exits.
19743 Previously, glibc would try to write them to /dev/tty, and the
19744 sandbox would trap the call and make Tor exit prematurely. Fixes
19745 bug 14759; bugfix on 0.2.5.1-alpha.
19747 o Minor bugfixes (shutdown):
19748 - When shutting down, always call event_del() on lingering read or
19749 write events before freeing them. Otherwise, we risk double-frees
19750 or read-after-frees in event_base_free(). Fixes bug 12985; bugfix
19753 o Minor bugfixes (small memory leaks):
19754 - Avoid leaking memory when using IPv6 virtual address mappings.
19755 Fixes bug 14123; bugfix on 0.2.4.7-alpha. Patch by Tom van
19758 o Minor bugfixes (statistics):
19759 - Increase period over which bandwidth observations are aggregated
19760 from 15 minutes to 4 hours. Fixes bug 13988; bugfix on 0.0.8pre1.
19762 o Minor bugfixes (systemd support):
19763 - Fix detection and operation of systemd watchdog. Fixes part of bug
19764 14141; bugfix on 0.2.6.2-alpha. Patch from Tomasz Torcz.
19765 - Run correctly under systemd with the RunAsDaemon option set. Fixes
19766 part of bug 14141; bugfix on 0.2.5.7-rc. Patch from Tomasz Torcz.
19767 - Inform the systemd supervisor about more changes in the Tor
19768 process status. Implements part of ticket 14141. Patch from
19770 - Cause the "--disable-systemd" option to actually disable systemd
19771 support. Fixes bug 14350; bugfix on 0.2.6.2-alpha. Patch
19774 o Minor bugfixes (TLS):
19775 - Check more thoroughly throughout the TLS code for possible
19776 unlogged TLS errors. Possible diagnostic or fix for bug 13319.
19778 o Minor bugfixes (transparent proxy):
19779 - Use getsockname, not getsockopt, to retrieve the address for a
19780 TPROXY-redirected connection. Fixes bug 13796; bugfix
19783 o Code simplification and refactoring:
19784 - Move fields related to isolating and configuring client ports into
19785 a shared structure. Previously, they were duplicated across
19786 port_cfg_t, listener_connection_t, and edge_connection_t. Failure
19787 to copy them correctly had been the cause of at least one bug in
19788 the past. Closes ticket 8546.
19789 - Refactor the get_interface_addresses_raw() doom-function into
19790 multiple smaller and simpler subfunctions. Cover the resulting
19791 subfunctions with unit-tests. Fixes a significant portion of
19793 - Remove workaround in dirserv_thinks_router_is_hs_dir() that was
19794 only for version <= 0.2.2.24 which is now deprecated. Closes
19796 - Remove a test for a long-defunct broken version-one
19800 - Adding section on OpenBSD to our TUNING document. Thanks to mmcc
19801 for writing the OpenBSD-specific tips. Resolves ticket 13702.
19802 - Make the tor-resolve documentation match its help string and its
19803 options. Resolves part of ticket 14325.
19804 - Log a more useful error message from tor-resolve when failing to
19805 look up a hidden service address. Resolves part of ticket 14325.
19807 o Downgraded warnings:
19808 - Don't warn when we've attempted to contact a relay using the wrong
19809 ntor onion key. Closes ticket 9635.
19811 o Removed features:
19812 - To avoid confusion with the "ExitRelay" option, "ExitNode" is no
19813 longer silently accepted as an alias for "ExitNodes".
19814 - The --enable-mempool and --enable-buf-freelists options, which
19815 were originally created to work around bad malloc implementations,
19816 no longer exist. They were off-by-default in 0.2.5. Closes
19820 - Make the checkdir/perms test complete successfully even if the
19821 global umask is not 022. Fixes bug 14215; bugfix on 0.2.6.2-alpha.
19822 - Test that tor does not fail when key files are zero-length. Check
19823 that tor generates new keys, and overwrites the empty key files.
19824 - Test that tor generates new keys when keys are missing
19825 (existing behavior).
19826 - Test that tor does not overwrite key files that already contain
19827 data (existing behavior). Tests bug 13111. Patch by "teor".
19828 - New "make test-stem" target to run stem integration tests.
19829 Requires that the "STEM_SOURCE_DIR" environment variable be set.
19830 Closes ticket 14107.
19831 - Make the test_cmdline_args.py script work correctly on Windows.
19832 Patch from Gisle Vanem.
19833 - Move the slower unit tests into a new "./src/test/test-slow"
19834 binary that can be run independently of the other tests. Closes
19836 - Avoid undefined behavior when sampling huge values from the
19837 Laplace distribution. This made unittests fail on Raspberry Pi.
19838 Bug found by Device. Fixes bug 14090; bugfix on 0.2.6.2-alpha.
19841 Changes in version 0.2.6.2-alpha - 2014-12-31
19842 Tor 0.2.6.2-alpha is the second alpha release in the 0.2.6.x series.
19843 It introduces a major new backend for deciding when to send cells on
19844 channels, which should lead down the road to big performance
19845 increases. It contains security and statistics features for better
19846 work on hidden services, and numerous bugfixes.
19848 This release contains many new unit tests, along with major
19849 performance improvements for running testing networks using Chutney.
19850 Thanks to a series of patches contributed by "teor", testing networks
19851 should now bootstrap in seconds, rather than minutes.
19853 o Major features (relay, infrastructure):
19854 - Complete revision of the code that relays use to decide which cell
19855 to send next. Formerly, we selected the best circuit to write on
19856 each channel, but we didn't select among channels in any
19857 sophisticated way. Now, we choose the best circuits globally from
19858 among those whose channels are ready to deliver traffic.
19860 This patch implements a new inter-cmux comparison API, a global
19861 high/low watermark mechanism and a global scheduler loop for
19862 transmission prioritization across all channels as well as among
19863 circuits on one channel. This schedule is currently tuned to
19864 (tolerantly) avoid making changes in network performance, but it
19865 should form the basis for major circuit performance increases in
19866 the future. Code by Andrea; tuning by Rob Jansen; implements
19869 o Major features (hidden services):
19870 - Make HS port scanning more difficult by immediately closing the
19871 circuit when a user attempts to connect to a nonexistent port.
19872 Closes ticket 13667.
19873 - Add a HiddenServiceStatistics option that allows Tor relays to
19874 gather and publish statistics about the overall size and volume of
19875 hidden service usage. Specifically, when this option is turned on,
19876 an HSDir will publish an approximate number of hidden services
19877 that have published descriptors to it the past 24 hours. Also, if
19878 a relay has acted as a hidden service rendezvous point, it will
19879 publish the approximate amount of rendezvous cells it has relayed
19880 the past 24 hours. The statistics themselves are obfuscated so
19881 that the exact values cannot be derived. For more details see
19882 proposal 238, "Better hidden service stats from Tor relays". This
19883 feature is currently disabled by default. Implements feature 13192.
19885 o Major bugfixes (client, automap):
19886 - Repair automapping with IPv6 addresses. This automapping should
19887 have worked previously, but one piece of debugging code that we
19888 inserted to detect a regression actually caused the regression to
19889 manifest itself again. Fixes bug 13811 and bug 12831; bugfix on
19890 0.2.4.7-alpha. Diagnosed and fixed by Francisco Blas
19893 o Major bugfixes (hidden services):
19894 - When closing an introduction circuit that was opened in parallel
19895 with others, don't mark the introduction point as unreachable.
19896 Previously, the first successful connection to an introduction
19897 point would make the other introduction points get marked as
19898 having timed out. Fixes bug 13698; bugfix on 0.0.6rc2.
19900 o Directory authority changes:
19901 - Remove turtles as a directory authority.
19902 - Add longclaw as a new (v3) directory authority. This implements
19903 ticket 13296. This keeps the directory authority count at 9.
19905 o Major removed features:
19906 - Tor clients no longer support connecting to hidden services
19907 running on Tor 0.2.2.x and earlier; the Support022HiddenServices
19908 option has been removed. (There shouldn't be any hidden services
19909 running these versions on the network.) Closes ticket 7803.
19911 o Minor features (client):
19912 - Validate hostnames in SOCKS5 requests more strictly. If SafeSocks
19913 is enabled, reject requests with IP addresses as hostnames.
19914 Resolves ticket 13315.
19916 o Minor features (controller):
19917 - Add a "SIGNAL HEARTBEAT" controller command that tells Tor to
19918 write an unscheduled heartbeat message to the log. Implements
19921 o Minor features (geoip):
19922 - Update geoip and geoip6 to the November 15 2014 Maxmind GeoLite2
19925 o Minor features (hidden services):
19926 - When re-enabling the network, don't try to build introduction
19927 circuits until we have successfully built a circuit. This makes
19928 hidden services come up faster when the network is re-enabled.
19929 Patch from "akwizgran". Closes ticket 13447.
19930 - When we fail to retrieve a hidden service descriptor, send the
19931 controller an "HS_DESC FAILED" controller event. Implements
19933 - New HiddenServiceDirGroupReadable option to cause hidden service
19934 directories and hostname files to be created group-readable. Patch
19935 from "anon", David Stainton, and "meejah". Closes ticket 11291.
19937 o Minor features (systemd):
19938 - Where supported, when running with systemd, report successful
19939 startup to systemd. Part of ticket 11016. Patch by Michael Scherer.
19940 - When running with systemd, support systemd watchdog messages. Part
19941 of ticket 11016. Patch by Michael Scherer.
19943 o Minor features (transparent proxy):
19944 - Update the transparent proxy option checks to allow for both ipfw
19945 and pf on OS X. Closes ticket 14002.
19946 - Use the correct option when using IPv6 with transparent proxy
19947 support on Linux. Resolves 13808. Patch by Francisco Blas
19950 o Minor bugfixes (preventative security, C safety):
19951 - When reading a hexadecimal, base-32, or base-64 encoded value from
19952 a string, always overwrite the whole output buffer. This prevents
19953 some bugs where we would look at (but fortunately, not reveal)
19954 uninitialized memory on the stack. Fixes bug 14013; bugfix on all
19956 - Clear all memory targeted by tor_addr_{to,from}_sockaddr(), not
19957 just the part that's used. This makes it harder for data leak bugs
19958 to occur in the event of other programming failures. Resolves
19961 o Minor bugfixes (client, microdescriptors):
19962 - Use a full 256 bits of the SHA256 digest of a microdescriptor when
19963 computing which microdescriptors to download. This keeps us from
19964 erroneous download behavior if two microdescriptor digests ever
19965 have the same first 160 bits. Fixes part of bug 13399; bugfix
19967 - Reset a router's status if its microdescriptor digest changes,
19968 even if the first 160 bits remain the same. Fixes part of bug
19969 13399; bugfix on 0.2.3.1-alpha.
19971 o Minor bugfixes (compilation):
19972 - Silence clang warnings under --enable-expensive-hardening,
19973 including implicit truncation of 64 bit values to 32 bit, const
19974 char assignment to self, tautological compare, and additional
19975 parentheses around equality tests. Fixes bug 13577; bugfix
19977 - Fix a clang warning about checking whether an address in the
19978 middle of a structure is NULL. Fixes bug 14001; bugfix
19981 o Minor bugfixes (hidden services):
19982 - Correctly send a controller event when we find that a rendezvous
19983 circuit has finished. Fixes bug 13936; bugfix on 0.1.1.5-alpha.
19984 - Pre-check directory permissions for new hidden-services to avoid
19985 at least one case of "Bug: Acting on config options left us in a
19986 broken state. Dying." Fixes bug 13942; bugfix on 0.0.6pre1.
19987 - When adding a new hidden service (for example, via SETCONF), Tor
19988 no longer congratulates the user for running a relay. Fixes bug
19989 13941; bugfix on 0.2.6.1-alpha.
19990 - When fetching hidden service descriptors, we now check not only
19991 for whether we got the hidden service we had in mind, but also
19992 whether we got the particular descriptors we wanted. This prevents
19993 a class of inefficient but annoying DoS attacks by hidden service
19994 directories. Fixes bug 13214; bugfix on 0.2.1.6-alpha. Reported
19997 o Minor bugfixes (Linux seccomp2 sandbox):
19998 - Make transparent proxy support work along with the seccomp2
19999 sandbox. Fixes part of bug 13808; bugfix on 0.2.5.1-alpha. Patch
20000 by Francisco Blas Izquierdo Riera.
20001 - Fix a memory leak in tor-resolve when running with the sandbox
20002 enabled. Fixes bug 14050; bugfix on 0.2.5.9-rc.
20004 o Minor bugfixes (logging):
20005 - Downgrade warnings about RSA signature failures to info log level.
20006 Emit a warning when an extra info document is found incompatible
20007 with a corresponding router descriptor. Fixes bug 9812; bugfix
20009 - Make connection_ap_handshake_attach_circuit() log the circuit ID
20010 correctly. Fixes bug 13701; bugfix on 0.0.6.
20012 o Minor bugfixes (misc):
20013 - Stop allowing invalid address patterns like "*/24" that contain
20014 both a wildcard address and a bit prefix length. This affects all
20015 our address-range parsing code. Fixes bug 7484; bugfix
20018 o Minor bugfixes (testing networks, fast startup):
20019 - Allow Tor to build circuits using a consensus with no exits. If
20020 the consensus has no exits (typical of a bootstrapping test
20021 network), allow Tor to build circuits once enough descriptors have
20022 been downloaded. This assists in bootstrapping a testing Tor
20023 network. Fixes bug 13718; bugfix on 0.2.4.10-alpha. Patch
20025 - When V3AuthVotingInterval is low, give a lower If-Modified-Since
20026 header to directory servers. This allows us to obtain consensuses
20027 promptly when the consensus interval is very short. This assists
20028 in bootstrapping a testing Tor network. Fixes parts of bugs 13718
20029 and 13963; bugfix on 0.2.0.3-alpha. Patch by "teor".
20030 - Stop assuming that private addresses are local when checking
20031 reachability in a TestingTorNetwork. Instead, when testing, assume
20032 all OR connections are remote. (This is necessary due to many test
20033 scenarios running all relays on localhost.) This assists in
20034 bootstrapping a testing Tor network. Fixes bug 13924; bugfix on
20035 0.1.0.1-rc. Patch by "teor".
20036 - Avoid building exit circuits from a consensus with no exits. Now
20037 thanks to our fix for 13718, we accept a no-exit network as not
20038 wholly lost, but we need to remember not to try to build exit
20039 circuits on it. Closes ticket 13814; patch by "teor".
20040 - Stop requiring exits to have non-zero bandwithcapacity in a
20041 TestingTorNetwork. Instead, when TestingMinExitFlagThreshold is 0,
20042 ignore exit bandwidthcapacity. This assists in bootstrapping a
20043 testing Tor network. Fixes parts of bugs 13718 and 13839; bugfix
20044 on 0.2.0.3-alpha. Patch by "teor".
20045 - Add "internal" to some bootstrap statuses when no exits are
20046 available. If the consensus does not contain Exits, Tor will only
20047 build internal circuits. In this case, relevant statuses will
20048 contain the word "internal" as indicated in the Tor control-
20049 spec.txt. When bootstrap completes, Tor will be ready to build
20050 internal circuits. If a future consensus contains Exits, exit
20051 circuits may become available. Fixes part of bug 13718; bugfix on
20052 0.2.4.10-alpha. Patch by "teor".
20053 - Decrease minimum consensus interval to 10 seconds when
20054 TestingTorNetwork is set, or 5 seconds for the first consensus.
20055 Fix assumptions throughout the code that assume larger intervals.
20056 Fixes bugs 13718 and 13823; bugfix on 0.2.0.3-alpha. Patch
20058 - Avoid excluding guards from path building in minimal test
20059 networks, when we're in a test network and excluding guards would
20060 exclude all relays. This typically occurs in incredibly small tor
20061 networks, and those using "TestingAuthVoteGuard *". Fixes part of
20062 bug 13718; bugfix on 0.1.1.11-alpha. Patch by "teor".
20064 o Code simplification and refactoring:
20065 - Stop using can_complete_circuits as a global variable; access it
20066 with a function instead.
20067 - Avoid using operators directly as macro arguments: this lets us
20068 apply coccinelle transformations to our codebase more directly.
20069 Closes ticket 13172.
20070 - Combine the functions used to parse ClientTransportPlugin and
20071 ServerTransportPlugin into a single function. Closes ticket 6456.
20072 - Add inline functions and convenience macros for inspecting channel
20073 state. Refactor the code to use convenience macros instead of
20074 checking channel state directly. Fixes issue 7356.
20075 - Document all members of was_router_added_t and rename
20076 ROUTER_WAS_NOT_NEW to ROUTER_IS_ALREADY_KNOWN to make it less
20077 confusable with ROUTER_WAS_TOO_OLD. Fixes issue 13644.
20078 - In connection_exit_begin_conn(), use END_CIRC_REASON_TORPROTOCOL
20079 constant instead of hardcoded value. Fixes issue 13840.
20080 - Refactor our generic strmap and digestmap types into a single
20081 implementation, so that we can add a new digest256map
20085 - Document the bridge-authority-only 'networkstatus-bridges' file.
20086 Closes ticket 13713; patch from "tom".
20087 - Fix typo in PredictedPortsRelevanceTime option description in
20088 manpage. Resolves issue 13707.
20089 - Stop suggesting that users specify relays by nickname: it isn't a
20090 good idea. Also, properly cross-reference how to specify relays in
20091 all parts of manual documenting options that take a list of
20092 relays. Closes ticket 13381.
20093 - Clarify the HiddenServiceDir option description in manpage to make
20094 it clear that relative paths are taken with respect to the current
20095 working directory. Also clarify that this behavior is not
20096 guaranteed to remain indefinitely. Fixes issue 13913.
20099 - New tests for many parts of channel, relay, and circuitmux
20100 functionality. Code by Andrea; part of 9262.
20101 - New tests for parse_transport_line(). Part of ticket 6456.
20102 - In the unit tests, use chgrp() to change the group of the unit
20103 test temporary directory to the current user, so that the sticky
20104 bit doesn't interfere with tests that check directory groups.
20106 - Add unit tests for resolve_my_addr(). Part of ticket 12376; patch
20110 Changes in version 0.2.6.1-alpha - 2014-10-30
20111 Tor 0.2.6.1-alpha is the first release in the Tor 0.2.6.x series. It
20112 includes numerous code cleanups and new tests, and fixes a large
20113 number of annoying bugs. Out-of-memory conditions are handled better
20114 than in 0.2.5, pluggable transports have improved proxy support, and
20115 clients now use optimistic data for contacting hidden services. Also,
20116 we are now more robust to changes in what we consider a parseable
20117 directory object, so that tightening restrictions does not have a risk
20118 of introducing infinite download loops.
20120 This is the first alpha release in a new series, so expect there to be
20121 bugs. Users who would rather test out a more stable branch should stay
20122 with 0.2.5.x for now.
20124 o New compiler and system requirements:
20125 - Tor 0.2.6.x requires that your compiler support more of the C99
20126 language standard than before. The 'configure' script now detects
20127 whether your compiler supports C99 mid-block declarations and
20128 designated initializers. If it does not, Tor will not compile.
20130 We may revisit this requirement if it turns out that a significant
20131 number of people need to build Tor with compilers that don't
20132 bother implementing a 15-year-old standard. Closes ticket 13233.
20133 - Tor no longer supports systems without threading support. When we
20134 began working on Tor, there were several systems that didn't have
20135 threads, or where the thread support wasn't able to run the
20136 threads of a single process on multiple CPUs. That no longer
20137 holds: every system where Tor needs to run well now has threading
20138 support. Resolves ticket 12439.
20140 o Removed platform support:
20141 - We no longer include special code to build on Windows CE; as far
20142 as we know, nobody has used Tor on Windows CE in a very long time.
20143 Closes ticket 11446.
20145 o Major features (bridges):
20146 - Expose the outgoing upstream HTTP/SOCKS proxy to pluggable
20147 transports if they are configured via the "TOR_PT_PROXY"
20148 environment variable. Implements proposal 232. Resolves
20151 o Major features (client performance, hidden services):
20152 - Allow clients to use optimistic data when connecting to a hidden
20153 service, which should remove a round-trip from hidden service
20154 initialization. See proposal 181 for details. Implements
20157 o Major features (directory system):
20158 - Upon receiving an unparseable directory object, if its digest
20159 matches what we expected, then don't try to download it again.
20160 Previously, when we got a descriptor we didn't like, we would keep
20161 trying to download it over and over. Closes ticket 11243.
20163 o Major features (sample torrc):
20164 - Add a new, infrequently-changed "torrc.minimal". This file is
20165 similar to torrc.sample, but it will change as infrequently as
20166 possible, for the benefit of users whose systems prompt them for
20167 intervention whenever a default configuration file is changed.
20168 Making this change allows us to update torrc.sample to be a more
20169 generally useful "sample torrc".
20171 o Major bugfixes (directory authorities):
20172 - Do not assign the HSDir flag to relays if they are not Valid, or
20173 currently hibernating. Fixes 12573; bugfix on 0.2.0.10-alpha.
20175 o Major bugfixes (directory bandwidth performance):
20176 - Don't flush the zlib buffer aggressively when compressing
20177 directory information for clients. This should save about 7% of
20178 the bandwidth currently used for compressed descriptors and
20179 microdescriptors. Fixes bug 11787; bugfix on 0.1.1.23.
20181 o Minor features (security, memory wiping):
20182 - Ensure we securely wipe keys from memory after
20183 crypto_digest_get_digest and init_curve25519_keypair_from_file
20184 have finished using them. Resolves ticket 13477.
20186 o Minor features (security, out-of-memory handling):
20187 - When handling an out-of-memory condition, allocate less memory for
20188 temporary data structures. Fixes issue 10115.
20189 - When handling an out-of-memory condition, consider more types of
20190 buffers, including those on directory connections, and zlib
20191 buffers. Resolves ticket 11792.
20194 - When identity keypair is generated for first time, log a
20195 congratulatory message that links to the new relay lifecycle
20196 document. Implements feature 10427.
20198 o Minor features (client):
20199 - Clients are now willing to send optimistic data (before they
20200 receive a 'connected' cell) to relays of any version. (Relays
20201 without support for optimistic data are no longer supported on the
20202 Tor network.) Resolves ticket 13153.
20204 o Minor features (directory authorities):
20205 - Don't list relays with a bandwidth estimate of 0 in the consensus.
20206 Implements a feature proposed during discussion of bug 13000.
20207 - In tor-gencert, report an error if the user provides the same
20208 argument more than once.
20209 - If a directory authority can't find a best consensus method in the
20210 votes that it holds, it now falls back to its favorite consensus
20211 method. Previously, it fell back to method 1. Neither of these is
20212 likely to get enough signatures, but "fall back to favorite"
20213 doesn't require us to maintain support an obsolete consensus
20214 method. Implements part of proposal 215.
20216 o Minor features (logging):
20217 - On Unix-like systems, you can now use named pipes as the target of
20218 the Log option, and other options that try to append to files.
20219 Closes ticket 12061. Patch from "carlo von lynX".
20220 - When opening a log file at startup, send it every log message that
20221 we generated between startup and opening it. Previously, log
20222 messages that were generated before opening the log file were only
20223 logged to stdout. Closes ticket 6938.
20224 - Add a TruncateLogFile option to overwrite logs instead of
20225 appending to them. Closes ticket 5583.
20227 o Minor features (portability, Solaris):
20228 - Threads are no longer disabled by default on Solaris; we believe
20229 that the versions of Solaris with broken threading support are all
20230 obsolete by now. Resolves ticket 9495.
20232 o Minor features (relay):
20233 - Re-check our address after we detect a changed IP address from
20234 getsockname(). This ensures that the controller command "GETINFO
20235 address" will report the correct value. Resolves ticket 11582.
20237 - A new AccountingRule option lets Relays set whether they'd like
20238 AccountingMax to be applied separately to inbound and outbound
20239 traffic, or applied to the sum of inbound and outbound traffic.
20240 Resolves ticket 961. Patch by "chobe".
20242 o Minor features (testing networks):
20243 - Add the TestingDirAuthVoteExit option, which lists nodes to assign
20244 the "Exit" flag regardless of their uptime, bandwidth, or exit
20245 policy. TestingTorNetwork must be set for this option to have any
20246 effect. Previously, authorities would take up to 35 minutes to
20247 give nodes the Exit flag in a test network. Partially implements
20250 o Minor features (validation):
20251 - Check all date/time values passed to tor_timegm and
20252 parse_rfc1123_time for validity, taking leap years into account.
20253 Improves HTTP header validation. Implemented with bug 13476.
20254 - In correct_tm(), limit the range of values returned by system
20255 localtime(_r) and gmtime(_r) to be between the years 1 and 8099.
20256 This means we don't have to deal with negative or too large dates,
20257 even if a clock is wrong. Otherwise we might fail to read a file
20258 written by us which includes such a date. Fixes bug 13476.
20260 o Minor bugfixes (bridge clients):
20261 - When configured to use a bridge without an identity digest (not
20262 recommended), avoid launching an extra channel to it when
20263 bootstrapping. Fixes bug 7733; bugfix on 0.2.4.4-alpha.
20265 o Minor bugfixes (bridges):
20266 - When DisableNetwork is set, do not launch pluggable transport
20267 plugins, and if any are running, terminate them. Fixes bug 13213;
20268 bugfix on 0.2.3.6-alpha.
20270 o Minor bugfixes (C correctness):
20271 - Fix several instances of possible integer overflow/underflow/NaN.
20272 Fixes bug 13104; bugfix on 0.2.3.1-alpha and later. Patches
20274 - In circuit_build_times_calculate_timeout() in circuitstats.c,
20275 avoid dividing by zero in the pareto calculations. This traps
20276 under clang's "undefined-trap" sanitizer. Fixes bug 13290; bugfix
20278 - Fix an integer overflow in format_time_interval(). Fixes bug
20279 13393; bugfix on 0.2.0.10-alpha.
20280 - Set the correct day of year value when the system's localtime(_r)
20281 or gmtime(_r) functions fail to set struct tm. Not externally
20282 visible. Fixes bug 13476; bugfix on 0.0.2pre14.
20283 - Avoid unlikely signed integer overflow in tor_timegm on systems
20284 with 32-bit time_t. Fixes bug 13476; bugfix on 0.0.2pre14.
20286 o Minor bugfixes (client):
20287 - Fix smartlist_choose_node_by_bandwidth() so that relays with the
20288 BadExit flag are not considered worthy candidates. Fixes bug
20289 13066; bugfix on 0.1.2.3-alpha.
20290 - Use the consensus schedule for downloading consensuses, and not
20291 the generic schedule. Fixes bug 11679; bugfix on 0.2.2.6-alpha.
20292 - Handle unsupported or malformed SOCKS5 requests properly by
20293 responding with the appropriate error message before closing the
20294 connection. Fixes bugs 12971 and 13314; bugfix on 0.0.2pre13.
20296 o Minor bugfixes (client, torrc):
20297 - Stop modifying the value of our DirReqStatistics torrc option just
20298 because we're not a bridge or relay. This bug was causing Tor
20299 Browser users to write "DirReqStatistics 0" in their torrc files
20300 as if they had chosen to change the config. Fixes bug 4244; bugfix
20302 - When GeoIPExcludeUnknown is enabled, do not incorrectly decide
20303 that our options have changed every time we SIGHUP. Fixes bug
20304 9801; bugfix on 0.2.4.10-alpha. Patch from "qwerty1".
20306 o Minor bugfixes (controller):
20307 - Return an error when the second or later arguments of the
20308 "setevents" controller command are invalid events. Previously we
20309 would return success while silently skipping invalid events. Fixes
20310 bug 13205; bugfix on 0.2.3.2-alpha. Reported by "fpxnns".
20312 o Minor bugfixes (directory system):
20313 - Always believe that v3 directory authorities serve extra-info
20314 documents, whether they advertise "caches-extra-info" or not.
20315 Fixes part of bug 11683; bugfix on 0.2.0.1-alpha.
20316 - When running as a v3 directory authority, advertise that you serve
20317 extra-info documents so that clients who want them can find them
20318 from you too. Fixes part of bug 11683; bugfix on 0.2.0.1-alpha.
20319 - Check the BRIDGE_DIRINFO flag bitwise rather than using equality.
20320 Previously, directories offering BRIDGE_DIRINFO and some other
20321 flag (i.e. microdescriptors or extrainfo) would be ignored when
20322 looking for bridges. Partially fixes bug 13163; bugfix
20325 o Minor bugfixes (networking):
20326 - Check for orconns and use connection_or_close_for_error() rather
20327 than connection_mark_for_close() directly in the getsockopt()
20328 failure case of connection_handle_write_impl(). Fixes bug 11302;
20329 bugfix on 0.2.4.4-alpha.
20331 o Minor bugfixes (relay):
20332 - When generating our family list, remove spaces from around the
20333 entries. Fixes bug 12728; bugfix on 0.2.1.7-alpha.
20334 - If our previous bandwidth estimate was 0 bytes, allow publishing a
20335 new relay descriptor immediately. Fixes bug 13000; bugfix
20338 o Minor bugfixes (testing networks):
20339 - Fix TestingDirAuthVoteGuard to properly give out Guard flags in a
20340 testing network. Fixes bug 13064; bugfix on 0.2.5.2-alpha.
20341 - Stop using the default authorities in networks which provide both
20342 AlternateDirAuthority and AlternateBridgeAuthority. Partially
20343 fixes bug 13163; bugfix on 0.2.0.13-alpha.
20345 o Minor bugfixes (testing):
20346 - Stop spawn test failures due to a race condition between the
20347 SIGCHLD handler updating the process status, and the test reading
20348 it. Fixes bug 13291; bugfix on 0.2.3.3-alpha.
20350 o Minor bugfixes (testing, Windows):
20351 - Avoid passing an extra backslash when creating a temporary
20352 directory for running the unit tests on Windows. Fixes bug 12392;
20353 bugfix on 0.2.2.25-alpha. Patch from Gisle Vanem.
20355 o Minor bugfixes (windows):
20356 - Remove code to special-case handling of NTE_BAD_KEYSET when
20357 acquiring windows CryptoAPI context. This error can't actually
20358 occur for the parameters we're providing. Fixes bug 10816; bugfix
20361 o Minor bugfixes (zlib):
20362 - Avoid truncating a zlib stream when trying to finalize it with an
20363 empty output buffer. Fixes bug 11824; bugfix on 0.1.1.23.
20366 - Allow our configure script to build correctly with autoconf 2.62
20367 again. Fixes bug 12693; bugfix on 0.2.5.2-alpha.
20368 - Improve the error message from ./configure to make it clear that
20369 when asciidoc has not been found, the user will have to either add
20370 --disable-asciidoc argument or install asciidoc. Resolves
20373 o Code simplification and refactoring:
20374 - Change the entry_is_live() function to take named bitfield
20375 elements instead of an unnamed list of booleans. Closes
20377 - Refactor and unit-test entry_is_time_to_retry() in entrynodes.c.
20378 Resolves ticket 12205.
20379 - Use calloc and reallocarray functions instead of multiply-
20380 then-malloc. This makes it less likely for us to fall victim to an
20381 integer overflow attack when allocating. Resolves ticket 12855.
20382 - Use the standard macro name SIZE_MAX, instead of our
20384 - Document usage of the NO_DIRINFO and ALL_DIRINFO flags clearly in
20385 functions which take them as arguments. Replace 0 with NO_DIRINFO
20386 in a function call for clarity. Seeks to prevent future issues
20388 - Avoid 4 null pointer errors under clang static analysis by using
20389 tor_assert() to prove that the pointers aren't null. Fixes
20391 - Rework the API of policies_parse_exit_policy() to use a bitmask to
20392 represent parsing options, instead of a confusing mess of
20393 booleans. Resolves ticket 8197.
20394 - Introduce a helper function to parse ExitPolicy in
20395 or_options_t structure.
20398 - Add a doc/TUNING document with tips for handling large numbers of
20399 TCP connections when running busy Tor relay. Update the warning
20400 message to point to this file when running out of sockets
20401 operating system is allowing to use simultaneously. Resolves
20404 o Removed features:
20405 - We no longer remind the user about configuration options that have
20406 been obsolete since 0.2.3.x or earlier. Patch by Adrien Bak.
20407 - Remove our old, non-weighted bandwidth-based node selection code.
20408 Previously, we used it as a fallback when we couldn't perform
20409 weighted bandwidth-based node selection. But that would only
20410 happen in the cases where we had no consensus, or when we had a
20411 consensus generated by buggy or ancient directory authorities. In
20412 either case, it's better to use the more modern, better maintained
20413 algorithm, with reasonable defaults for the weights. Closes
20415 - Remove the --disable-curve25519 configure option. Relays and
20416 clients now are required to support curve25519 and the
20418 - The old "StrictEntryNodes" and "StrictExitNodes" options, which
20419 used to be deprecated synonyms for "StrictNodes", are now marked
20420 obsolete. Resolves ticket 12226.
20421 - Clients don't understand the BadDirectory flag in the consensus
20422 anymore, and ignore it.
20425 - Refactor the function that chooses guard nodes so that it can more
20426 easily be tested; write some tests for it.
20427 - Fix and re-enable the fgets_eagain unit test. Fixes bug 12503;
20428 bugfix on 0.2.3.1-alpha. Patch from "cypherpunks."
20429 - Create unit tests for format_time_interval(). With bug 13393.
20430 - Add unit tests for tor_timegm signed overflow, tor_timegm and
20431 parse_rfc1123_time validity checks, correct_tm year clamping. Unit
20432 tests (visible) fixes in bug 13476.
20433 - Add a "coverage-html" make target to generate HTML-visualized
20434 coverage results when building with --enable-coverage. (Requires
20435 lcov.) Patch from Kevin Murray.
20436 - Enable the backtrace handler (where supported) when running the
20438 - Revise all unit tests that used the legacy test_* macros to
20439 instead use the recommended tt_* macros. This patch was generated
20440 with coccinelle, to avoid manual errors. Closes ticket 13119.
20442 o Distribution (systemd):
20443 - systemd unit file: only allow tor to write to /var/lib/tor and
20444 /var/log/tor. The rest of the filesystem is accessible for reading
20445 only. Patch by intrigeri; resolves ticket 12751.
20446 - systemd unit file: ensure that the process and all its children
20447 can never gain new privileges. Patch by intrigeri; resolves
20449 - systemd unit file: set up /var/run/tor as writable for the Tor
20450 service. Patch by intrigeri; resolves ticket 13196.
20452 o Removed features (directory authorities):
20453 - Remove code that prevented authorities from listing Tor relays
20454 affected by CVE-2011-2769 as guards. These relays are already
20455 rejected altogether due to the minimum version requirement of
20456 0.2.3.16-alpha. Closes ticket 13152.
20457 - The "AuthDirRejectUnlisted" option no longer has any effect, as
20458 the fingerprints file (approved-routers) has been deprecated.
20459 - Directory authorities do not support being Naming dirauths anymore.
20460 The "NamingAuthoritativeDir" config option is now obsolete.
20461 - Directory authorities do not support giving out the BadDirectory
20463 - Directory authorities no longer advertise or support consensus
20464 methods 1 through 12 inclusive. These consensus methods were
20465 obsolete and/or insecure: maintaining the ability to support them
20466 served no good purpose. Implements part of proposal 215; closes
20469 o Testing (test-network.sh):
20470 - Stop using "echo -n", as some shells' built-in echo doesn't
20471 support "-n". Instead, use "/bin/echo -n". Partially fixes
20473 - Stop an apparent test-network hang when used with make -j2. Fixes
20475 - Add a --delay option to test-network.sh, which configures the
20476 delay before the chutney network tests for data transmission.
20477 Partially implements ticket 13161.
20480 Changes in version 0.2.5.10 - 2014-10-24
20481 Tor 0.2.5.10 is the first stable release in the 0.2.5 series.
20483 It adds several new security features, including improved
20484 denial-of-service resistance for relays, new compiler hardening
20485 options, and a system-call sandbox for hardened installations on Linux
20486 (requires seccomp2). The controller protocol has several new features,
20487 resolving IPv6 addresses should work better than before, and relays
20488 should be a little more CPU-efficient. We've added support for more
20489 OpenBSD and FreeBSD transparent proxy types. We've improved the build
20490 system and testing infrastructure to allow unit testing of more parts
20491 of the Tor codebase. Finally, we've addressed several nagging pluggable
20492 transport usability issues, and included numerous other small bugfixes
20493 and features mentioned below.
20495 This release marks end-of-life for Tor 0.2.3.x; those Tor versions
20496 have accumulated many known flaws; everyone should upgrade.
20498 o Deprecated versions:
20499 - Tor 0.2.3.x has reached end-of-life; it has received no patches or
20500 attention for some while.
20503 Changes in version 0.2.5.9-rc - 2014-10-20
20504 Tor 0.2.5.9-rc is the third release candidate for the Tor 0.2.5.x
20505 series. It disables SSL3 in response to the recent "POODLE" attack
20506 (even though POODLE does not affect Tor). It also works around a crash
20507 bug caused by some operating systems' response to the "POODLE" attack
20508 (which does affect Tor). It also contains a few miscellaneous fixes.
20510 o Major security fixes:
20511 - Disable support for SSLv3. All versions of OpenSSL in use with Tor
20512 today support TLS 1.0 or later, so we can safely turn off support
20513 for this old (and insecure) protocol. Fixes bug 13426.
20515 o Major bugfixes (openssl bug workaround):
20516 - Avoid crashing when using OpenSSL version 0.9.8zc, 1.0.0o, or
20517 1.0.1j, built with the 'no-ssl3' configuration option. Fixes bug
20518 13471. This is a workaround for an OpenSSL bug.
20521 - Disable the sandbox name resolver cache when running tor-resolve:
20522 tor-resolve doesn't use the sandbox code, and turning it on was
20523 breaking attempts to do tor-resolve on a non-default server on
20524 Linux. Fixes bug 13295; bugfix on 0.2.5.3-alpha.
20526 o Compilation fixes:
20527 - Build and run correctly on systems like OpenBSD-current that have
20528 patched OpenSSL to remove get_cipher_by_char and/or its
20529 implementations. Fixes issue 13325.
20531 o Downgraded warnings:
20532 - Downgrade the severity of the 'unexpected sendme cell from client'
20533 from 'warn' to 'protocol warning'. Closes ticket 8093.
20536 Changes in version 0.2.4.25 - 2014-10-20
20537 Tor 0.2.4.25 disables SSL3 in response to the recent "POODLE" attack
20538 (even though POODLE does not affect Tor). It also works around a crash
20539 bug caused by some operating systems' response to the "POODLE" attack
20540 (which does affect Tor).
20542 o Major security fixes (also in 0.2.5.9-rc):
20543 - Disable support for SSLv3. All versions of OpenSSL in use with Tor
20544 today support TLS 1.0 or later, so we can safely turn off support
20545 for this old (and insecure) protocol. Fixes bug 13426.
20547 o Major bugfixes (openssl bug workaround, also in 0.2.5.9-rc):
20548 - Avoid crashing when using OpenSSL version 0.9.8zc, 1.0.0o, or
20549 1.0.1j, built with the 'no-ssl3' configuration option. Fixes bug
20550 13471. This is a workaround for an OpenSSL bug.
20553 Changes in version 0.2.5.8-rc - 2014-09-22
20554 Tor 0.2.5.8-rc is the second release candidate for the Tor 0.2.5.x
20555 series. It fixes a bug that affects consistency and speed when
20556 connecting to hidden services, and it updates the location of one of
20557 the directory authorities.
20560 - Clients now send the correct address for their chosen rendezvous
20561 point when trying to access a hidden service. They used to send
20562 the wrong address, which would still work some of the time because
20563 they also sent the identity digest of the rendezvous point, and if
20564 the hidden service happened to try connecting to the rendezvous
20565 point from a relay that already had a connection open to it,
20566 the relay would reuse that connection. Now connections to hidden
20567 services should be more robust and faster. Also, this bug meant
20568 that clients were leaking to the hidden service whether they were
20569 on a little-endian (common) or big-endian (rare) system, which for
20570 some users might have reduced their anonymity. Fixes bug 13151;
20571 bugfix on 0.2.1.5-alpha.
20573 o Directory authority changes:
20574 - Change IP address for gabelmoo (v3 directory authority).
20577 Changes in version 0.2.4.24 - 2014-09-22
20578 Tor 0.2.4.24 fixes a bug that affects consistency and speed when
20579 connecting to hidden services, and it updates the location of one of
20580 the directory authorities.
20583 - Clients now send the correct address for their chosen rendezvous
20584 point when trying to access a hidden service. They used to send
20585 the wrong address, which would still work some of the time because
20586 they also sent the identity digest of the rendezvous point, and if
20587 the hidden service happened to try connecting to the rendezvous
20588 point from a relay that already had a connection open to it,
20589 the relay would reuse that connection. Now connections to hidden
20590 services should be more robust and faster. Also, this bug meant
20591 that clients were leaking to the hidden service whether they were
20592 on a little-endian (common) or big-endian (rare) system, which for
20593 some users might have reduced their anonymity. Fixes bug 13151;
20594 bugfix on 0.2.1.5-alpha.
20596 o Directory authority changes:
20597 - Change IP address for gabelmoo (v3 directory authority).
20599 o Minor features (geoip):
20600 - Update geoip and geoip6 to the August 7 2014 Maxmind GeoLite2
20604 Changes in version 0.2.5.7-rc - 2014-09-11
20605 Tor 0.2.5.7-rc fixes several regressions from earlier in the 0.2.5.x
20606 release series, and some long-standing bugs related to ORPort reachability
20607 testing and failure to send CREATE cells. It is the first release
20608 candidate for the Tor 0.2.5.x series.
20610 o Major bugfixes (client, startup):
20611 - Start making circuits as soon as DisabledNetwork is turned off.
20612 When Tor started with DisabledNetwork set, it would correctly
20613 conclude that it shouldn't build circuits, but it would mistakenly
20614 cache this conclusion, and continue believing it even when
20615 DisableNetwork is set to 0. Fixes the bug introduced by the fix
20616 for bug 11200; bugfix on 0.2.5.4-alpha.
20617 - Resume expanding abbreviations for command-line options. The fix
20618 for bug 4647 accidentally removed our hack from bug 586 that
20619 rewrote HashedControlPassword to __HashedControlSessionPassword
20620 when it appears on the commandline (which allowed the user to set
20621 her own HashedControlPassword in the torrc file while the
20622 controller generates a fresh session password for each run). Fixes
20623 bug 12948; bugfix on 0.2.5.1-alpha.
20624 - Warn about attempts to run hidden services and relays in the same
20625 process: that's probably not a good idea. Closes ticket 12908.
20627 o Major bugfixes (relay):
20628 - Avoid queuing or sending destroy cells for circuit ID zero when we
20629 fail to send a CREATE cell. Fixes bug 12848; bugfix on 0.0.8pre1.
20630 Found and fixed by "cypherpunks".
20631 - Fix ORPort reachability detection on relays running behind a
20632 proxy, by correctly updating the "local" mark on the controlling
20633 channel when changing the address of an or_connection_t after the
20634 handshake. Fixes bug 12160; bugfix on 0.2.4.4-alpha.
20636 o Minor features (bridge):
20637 - Add an ExtORPortCookieAuthFileGroupReadable option to make the
20638 cookie file for the ExtORPort g+r by default.
20640 o Minor features (geoip):
20641 - Update geoip and geoip6 to the August 7 2014 Maxmind GeoLite2
20644 o Minor bugfixes (logging):
20645 - Reduce the log severity of the "Pluggable transport proxy does not
20646 provide any needed transports and will not be launched." message,
20647 since Tor Browser includes several ClientTransportPlugin lines in
20648 its torrc-defaults file, leading every Tor Browser user who looks
20649 at her logs to see these notices and wonder if they're dangerous.
20650 Resolves bug 13124; bugfix on 0.2.5.3-alpha.
20651 - Downgrade "Unexpected onionskin length after decryption" warning
20652 to a protocol-warn, since there's nothing relay operators can do
20653 about a client that sends them a malformed create cell. Resolves
20654 bug 12996; bugfix on 0.0.6rc1.
20655 - Log more specific warnings when we get an ESTABLISH_RENDEZVOUS
20656 cell on a cannibalized or non-OR circuit. Resolves ticket 12997.
20657 - When logging information about an EXTEND2 or EXTENDED2 cell, log
20658 their names correctly. Fixes part of bug 12700; bugfix
20660 - When logging information about a relay cell whose command we don't
20661 recognize, log its command as an integer. Fixes part of bug 12700;
20662 bugfix on 0.2.1.10-alpha.
20663 - Escape all strings from the directory connection before logging
20664 them. Fixes bug 13071; bugfix on 0.1.1.15. Patch from "teor".
20666 o Minor bugfixes (controller):
20667 - Restore the functionality of CookieAuthFileGroupReadable. Fixes
20668 bug 12864; bugfix on 0.2.5.1-alpha.
20669 - Actually send TRANSPORT_LAUNCHED and HS_DESC events to
20670 controllers. Fixes bug 13085; bugfix on 0.2.5.1-alpha. Patch
20673 o Minor bugfixes (compilation):
20674 - Fix compilation of test.h with MSVC. Patch from Gisle Vanem;
20675 bugfix on 0.2.5.5-alpha.
20676 - Make the nmake make files work again. Fixes bug 13081. Bugfix on
20677 0.2.5.1-alpha. Patch from "NewEraCracker".
20678 - In routerlist_assert_ok(), don't take the address of a
20679 routerinfo's cache_info member unless that routerinfo is non-NULL.
20680 Fixes bug 13096; bugfix on 0.1.1.9-alpha. Patch by "teor".
20681 - Fix a large number of false positive warnings from the clang
20682 analyzer static analysis tool. This should make real warnings
20683 easier for clang analyzer to find. Patch from "teor". Closes
20686 o Distribution (systemd):
20687 - Verify configuration file via ExecStartPre in the systemd unit
20688 file. Patch from intrigeri; resolves ticket 12730.
20689 - Explicitly disable RunAsDaemon in the systemd unit file. Our
20690 current systemd unit uses "Type = simple", so systemd does not
20691 expect tor to fork. If the user has "RunAsDaemon 1" in their
20692 torrc, then things won't work as expected. This is e.g. the case
20693 on Debian (and derivatives), since there we pass "--defaults-torrc
20694 /usr/share/tor/tor-service-defaults-torrc" (that contains
20695 "RunAsDaemon 1") by default. Patch by intrigeri; resolves
20699 - Adjust the URLs in the README to refer to the new locations of
20700 several documents on the website. Fixes bug 12830. Patch from
20702 - Document 'reject6' and 'accept6' ExitPolicy entries. Resolves
20706 Changes in version 0.2.5.6-alpha - 2014-07-28
20707 Tor 0.2.5.6-alpha brings us a big step closer to slowing down the
20708 risk from guard rotation, and fixes a variety of other issues to get
20709 us closer to a release candidate.
20711 o Major features (also in 0.2.4.23):
20712 - Make the number of entry guards configurable via a new
20713 NumEntryGuards consensus parameter, and the number of directory
20714 guards configurable via a new NumDirectoryGuards consensus
20715 parameter. Implements ticket 12688.
20717 o Major bugfixes (also in 0.2.4.23):
20718 - Fix a bug in the bounds-checking in the 32-bit curve25519-donna
20719 implementation that caused incorrect results on 32-bit
20720 implementations when certain malformed inputs were used along with
20721 a small class of private ntor keys. This bug does not currently
20722 appear to allow an attacker to learn private keys or impersonate a
20723 Tor server, but it could provide a means to distinguish 32-bit Tor
20724 implementations from 64-bit Tor implementations. Fixes bug 12694;
20725 bugfix on 0.2.4.8-alpha. Bug found by Robert Ransom; fix from
20729 - Perform circuit cleanup operations even when circuit
20730 construction operations are disabled (because the network is
20731 disabled, or because there isn't enough directory information).
20732 Previously, when we were not building predictive circuits, we
20733 were not closing expired circuits either. Fixes bug 8387; bugfix on
20734 0.1.1.11-alpha. This bug became visible in 0.2.4.10-alpha when we
20735 became more strict about when we have "enough directory information
20736 to build circuits".
20739 - Authorities now assign the Guard flag to the fastest 25% of the
20740 network (it used to be the fastest 50%). Also raise the consensus
20741 weight that guarantees the Guard flag from 250 to 2000. For the
20742 current network, this results in about 1100 guards, down from 2500.
20743 This step paves the way for moving the number of entry guards
20744 down to 1 (proposal 236) while still providing reasonable expected
20745 performance for most users. Implements ticket 12690.
20746 - Update geoip and geoip6 to the July 10 2014 Maxmind GeoLite2
20748 - Slightly enhance the diagnostic message for bug 12184.
20750 o Minor bugfixes (also in 0.2.4.23):
20751 - Warn and drop the circuit if we receive an inbound 'relay early'
20752 cell. Those used to be normal to receive on hidden service circuits
20753 due to bug 1038, but the buggy Tor versions are long gone from
20754 the network so we can afford to resume watching for them. Resolves
20755 the rest of bug 1038; bugfix on 0.2.1.19.
20756 - Correct a confusing error message when trying to extend a circuit
20757 via the control protocol but we don't know a descriptor or
20758 microdescriptor for one of the specified relays. Fixes bug 12718;
20759 bugfix on 0.2.3.1-alpha.
20762 - Fix compilation when building with bufferevents enabled. (This
20763 configuration is still not expected to work, however.)
20764 Fixes bugs 12438, 12474, 11578; bugfixes on 0.2.5.1-alpha and
20765 0.2.5.3-alpha. Patches from Anthony G. Basile and Sathyanarayanan
20767 - Compile correctly with builds and forks of OpenSSL (such as
20768 LibreSSL) that disable compression. Fixes bug 12602; bugfix on
20769 0.2.1.1-alpha. Patch from "dhill".
20772 Changes in version 0.2.4.23 - 2014-07-28
20773 Tor 0.2.4.23 brings us a big step closer to slowing down the risk from
20774 guard rotation, and also backports several important fixes from the
20775 Tor 0.2.5 alpha release series.
20778 - Clients now look at the "usecreatefast" consensus parameter to
20779 decide whether to use CREATE_FAST or CREATE cells for the first hop
20780 of their circuit. This approach can improve security on connections
20781 where Tor's circuit handshake is stronger than the available TLS
20782 connection security levels, but the tradeoff is more computational
20783 load on guard relays. Implements proposal 221. Resolves ticket 9386.
20784 - Make the number of entry guards configurable via a new
20785 NumEntryGuards consensus parameter, and the number of directory
20786 guards configurable via a new NumDirectoryGuards consensus
20787 parameter. Implements ticket 12688.
20790 - Fix a bug in the bounds-checking in the 32-bit curve25519-donna
20791 implementation that caused incorrect results on 32-bit
20792 implementations when certain malformed inputs were used along with
20793 a small class of private ntor keys. This bug does not currently
20794 appear to allow an attacker to learn private keys or impersonate a
20795 Tor server, but it could provide a means to distinguish 32-bit Tor
20796 implementations from 64-bit Tor implementations. Fixes bug 12694;
20797 bugfix on 0.2.4.8-alpha. Bug found by Robert Ransom; fix from
20801 - Warn and drop the circuit if we receive an inbound 'relay early'
20802 cell. Those used to be normal to receive on hidden service circuits
20803 due to bug 1038, but the buggy Tor versions are long gone from
20804 the network so we can afford to resume watching for them. Resolves
20805 the rest of bug 1038; bugfix on 0.2.1.19.
20806 - Correct a confusing error message when trying to extend a circuit
20807 via the control protocol but we don't know a descriptor or
20808 microdescriptor for one of the specified relays. Fixes bug 12718;
20809 bugfix on 0.2.3.1-alpha.
20810 - Avoid an illegal read from stack when initializing the TLS
20811 module using a version of OpenSSL without all of the ciphers
20812 used by the v2 link handshake. Fixes bug 12227; bugfix on
20813 0.2.4.8-alpha. Found by "starlight".
20816 - Update geoip and geoip6 to the July 10 2014 Maxmind GeoLite2
20820 Changes in version 0.2.5.5-alpha - 2014-06-18
20821 Tor 0.2.5.5-alpha fixes a wide variety of remaining issues in the Tor
20822 0.2.5.x release series, including a couple of DoS issues, some
20823 performance regressions, a large number of bugs affecting the Linux
20824 seccomp2 sandbox code, and various other bugfixes. It also adds
20825 diagnostic bugfixes for a few tricky issues that we're trying to
20828 o Major features (security, traffic analysis resistance):
20829 - Several major improvements to the algorithm used to decide when to
20830 close TLS connections. Previous versions of Tor closed connections
20831 at a fixed interval after the last time a non-padding cell was
20832 sent over the connection, regardless of the target of the
20833 connection. Now, we randomize the intervals by adding up to 50% of
20834 their base value, we measure the length of time since connection
20835 last had at least one circuit, and we allow connections to known
20836 ORs to remain open a little longer (15 minutes instead of 3
20837 minutes minimum). These changes should improve Tor's resistance
20838 against some kinds of traffic analysis, and lower some overhead
20839 from needlessly closed connections. Fixes ticket 6799.
20840 Incidentally fixes ticket 12023; bugfix on 0.2.5.1-alpha.
20842 o Major bugfixes (security, OOM, new since 0.2.5.4-alpha, also in 0.2.4.22):
20843 - Fix a memory leak that could occur if a microdescriptor parse
20844 fails during the tokenizing step. This bug could enable a memory
20845 exhaustion attack by directory servers. Fixes bug 11649; bugfix
20848 o Major bugfixes (security, directory authorities):
20849 - Directory authorities now include a digest of each relay's
20850 identity key as a part of its microdescriptor.
20852 This is a workaround for bug 11743 (reported by "cypherpunks"),
20853 where Tor clients do not support receiving multiple
20854 microdescriptors with the same SHA256 digest in the same
20855 consensus. When clients receive a consensus like this, they only
20856 use one of the relays. Without this fix, a hostile relay could
20857 selectively disable some client use of target relays by
20858 constructing a router descriptor with a different identity and the
20859 same microdescriptor parameters and getting the authorities to
20860 list it in a microdescriptor consensus. This fix prevents an
20861 attacker from causing a microdescriptor collision, because the
20862 router's identity is not forgeable.
20864 o Major bugfixes (relay):
20865 - Use a direct dirport connection when uploading non-anonymous
20866 descriptors to the directory authorities. Previously, relays would
20867 incorrectly use tunnel connections under a fairly wide variety of
20868 circumstances. Fixes bug 11469; bugfix on 0.2.4.3-alpha.
20869 - When a circuit accidentally has the same circuit ID for its
20870 forward and reverse direction, correctly detect the direction of
20871 cells using that circuit. Previously, this bug made roughly one
20872 circuit in a million non-functional. Fixes bug 12195; this is a
20873 bugfix on every version of Tor.
20875 o Major bugfixes (client, pluggable transports):
20876 - When managing pluggable transports, use OS notification facilities
20877 to learn if they have crashed, and don't attempt to kill any
20878 process that has already exited. Fixes bug 8746; bugfix
20881 o Minor features (diagnostic):
20882 - When logging a warning because of bug 7164, additionally check the
20883 hash table for consistency (as proposed on ticket 11737). This may
20884 help diagnose bug 7164.
20885 - When we log a heartbeat, log how many one-hop circuits we have
20886 that are at least 30 minutes old, and log status information about
20887 a few of them. This is an attempt to track down bug 8387.
20888 - When encountering an unexpected CR while writing text to a file on
20889 Windows, log the name of the file. Should help diagnosing
20891 - Give more specific warnings when a client notices that an onion
20892 handshake has failed. Fixes ticket 9635.
20893 - Add significant new logging code to attempt to diagnose bug 12184,
20894 where relays seem to run out of available circuit IDs.
20895 - Improve the diagnostic log message for bug 8387 even further to
20896 try to improve our odds of figuring out why one-hop directory
20897 circuits sometimes do not get closed.
20899 o Minor features (security, memory management):
20900 - Memory allocation tricks (mempools and buffer freelists) are now
20901 disabled by default. You can turn them back on with
20902 --enable-mempools and --enable-buf-freelists respectively. We're
20903 disabling these features because malloc performance is good enough
20904 on most platforms, and a similar feature in OpenSSL exacerbated
20905 exploitation of the Heartbleed attack. Resolves ticket 11476.
20907 o Minor features (security):
20908 - Apply the secure SipHash-2-4 function to the hash table mapping
20909 circuit IDs and channels to circuits. We missed this one when we
20910 were converting all the other hash functions to use SipHash back
20911 in 0.2.5.3-alpha. Resolves ticket 11750.
20913 o Minor features (build):
20914 - The configure script has a --disable-seccomp option to turn off
20915 support for libseccomp on systems that have it, in case it (or
20916 Tor's use of it) is broken. Resolves ticket 11628.
20918 o Minor features (other):
20919 - Update geoip and geoip6 to the June 4 2014 Maxmind GeoLite2
20922 o Minor bugfixes (security, new since 0.2.5.4-alpha, also in 0.2.4.22):
20923 - When running a hidden service, do not allow TunneledDirConns 0;
20924 this will keep the hidden service from running, and also
20925 make it publish its descriptors directly over HTTP. Fixes bug 10849;
20926 bugfix on 0.2.1.1-alpha.
20928 o Minor bugfixes (performance):
20929 - Avoid a bug where every successful connection made us recompute
20930 the flag telling us whether we have sufficient information to
20931 build circuits. Previously, we would forget our cached value
20932 whenever we successfully opened a channel (or marked a router as
20933 running or not running for any other reason), regardless of
20934 whether we had previously believed the router to be running. This
20935 forced us to run an expensive update operation far too often.
20936 Fixes bug 12170; bugfix on 0.1.2.1-alpha.
20937 - Avoid using tor_memeq() for checking relay cell integrity. This
20938 removes a possible performance bottleneck. Fixes part of bug
20939 12169; bugfix on 0.2.1.31.
20941 o Minor bugfixes (compilation):
20942 - Fix compilation of test_status.c when building with MVSC. Bugfix
20943 on 0.2.5.4-alpha. Patch from Gisle Vanem.
20944 - Resolve GCC complaints on OpenBSD about discarding constness in
20945 TO_{ORIGIN,OR}_CIRCUIT functions. Fixes part of bug 11633; bugfix
20946 on 0.1.1.23. Patch from Dana Koch.
20947 - Resolve clang complaints on OpenBSD with -Wshorten-64-to-32 due to
20948 treatment of long and time_t as comparable types. Fixes part of
20949 bug 11633. Patch from Dana Koch.
20950 - Make Tor compile correctly with --disable-buf-freelists. Fixes bug
20951 11623; bugfix on 0.2.5.3-alpha.
20952 - When deciding whether to build the 64-bit curve25519
20953 implementation, detect platforms where we can compile 128-bit
20954 arithmetic but cannot link it. Fixes bug 11729; bugfix on
20955 0.2.4.8-alpha. Patch from "conradev".
20956 - Fix compilation when DNS_CACHE_DEBUG is enabled. Fixes bug 11761;
20957 bugfix on 0.2.3.13-alpha. Found by "cypherpunks".
20958 - Fix compilation with dmalloc. Fixes bug 11605; bugfix
20961 o Minor bugfixes (Directory server):
20962 - When sending a compressed set of descriptors or microdescriptors,
20963 make sure to finalize the zlib stream. Previously, we would write
20964 all the compressed data, but if the last descriptor we wanted to
20965 send was missing or too old, we would not mark the stream as
20966 finished. This caused problems for decompression tools. Fixes bug
20967 11648; bugfix on 0.1.1.23.
20969 o Minor bugfixes (Linux seccomp sandbox):
20970 - Make the seccomp sandbox code compile under ARM Linux. Fixes bug
20971 11622; bugfix on 0.2.5.1-alpha.
20972 - Avoid crashing when re-opening listener ports with the seccomp
20973 sandbox active. Fixes bug 12115; bugfix on 0.2.5.1-alpha.
20974 - Avoid crashing with the seccomp sandbox enabled along with
20975 ConstrainedSockets. Fixes bug 12139; bugfix on 0.2.5.1-alpha.
20976 - When we receive a SIGHUP with the sandbox enabled, correctly
20977 support rotating our log files. Fixes bug 12032; bugfix
20979 - Avoid crash when running with sandboxing enabled and
20980 DirReqStatistics not disabled. Fixes bug 12035; bugfix
20982 - Fix a "BUG" warning when trying to write bridge-stats files with
20983 the Linux syscall sandbox filter enabled. Fixes bug 12041; bugfix
20985 - Prevent the sandbox from crashing on startup when run with the
20986 --enable-expensive-hardening configuration option. Fixes bug
20987 11477; bugfix on 0.2.5.4-alpha.
20988 - When running with DirPortFrontPage and sandboxing both enabled,
20989 reload the DirPortFrontPage correctly when restarting. Fixes bug
20990 12028; bugfix on 0.2.5.1-alpha.
20991 - Don't try to enable the sandbox when using the Tor binary to check
20992 its configuration, hash a passphrase, or so on. Doing so was
20993 crashing on startup for some users. Fixes bug 11609; bugfix
20995 - Avoid warnings when running with sandboxing and node statistics
20996 enabled at the same time. Fixes part of 12064; bugfix on
20997 0.2.5.1-alpha. Patch from Michael Wolf.
20998 - Avoid warnings when running with sandboxing enabled at the same
20999 time as cookie authentication, hidden services, or directory
21000 authority voting. Fixes part of 12064; bugfix on 0.2.5.1-alpha.
21001 - Do not allow options that require calls to exec to be enabled
21002 alongside the seccomp2 sandbox: they will inevitably crash. Fixes
21003 bug 12043; bugfix on 0.2.5.1-alpha.
21004 - Handle failures in getpwnam()/getpwuid() when running with the
21005 User option set and the Linux syscall sandbox enabled. Fixes bug
21006 11946; bugfix on 0.2.5.1-alpha.
21007 - Refactor the getaddrinfo workaround that the seccomp sandbox uses
21008 to avoid calling getaddrinfo() after installing the sandbox
21009 filters. Previously, it preloaded a cache with the IPv4 address
21010 for our hostname, and nothing else. Now, it loads the cache with
21011 every address that it used to initialize the Tor process. Fixes
21012 bug 11970; bugfix on 0.2.5.1-alpha.
21014 o Minor bugfixes (pluggable transports):
21015 - Enable the ExtORPortCookieAuthFile option, to allow changing the
21016 default location of the authentication token for the extended OR
21017 Port as used by sever-side pluggable transports. We had
21018 implemented this option before, but the code to make it settable
21019 had been omitted. Fixes bug 11635; bugfix on 0.2.5.1-alpha.
21020 - Avoid another 60-second delay when starting Tor in a pluggable-
21021 transport-using configuration when we already have cached
21022 descriptors for our bridges. Fixes bug 11965; bugfix
21025 o Minor bugfixes (client):
21026 - Avoid "Tried to open a socket with DisableNetwork set" warnings
21027 when starting a client with bridges configured and DisableNetwork
21028 set. (Tor launcher starts Tor with DisableNetwork set the first
21029 time it runs.) Fixes bug 10405; bugfix on 0.2.3.9-alpha.
21031 o Minor bugfixes (testing):
21032 - The Python parts of the test scripts now work on Python 3 as well
21033 as Python 2, so systems where '/usr/bin/python' is Python 3 will
21034 no longer have the tests break. Fixes bug 11608; bugfix
21036 - When looking for versions of python that we could run the tests
21037 with, check for "python2.7" and "python3.3"; previously we were
21038 only looking for "python", "python2", and "python3". Patch from
21039 Dana Koch. Fixes bug 11632; bugfix on 0.2.5.2-alpha.
21040 - Fix all valgrind warnings produced by the unit tests. There were
21041 over a thousand memory leak warnings previously, mostly produced
21042 by forgetting to free things in the unit test code. Fixes bug
21043 11618, bugfixes on many versions of Tor.
21045 o Minor bugfixes (tor-fw-helper):
21046 - Give a correct log message when tor-fw-helper fails to launch.
21047 (Previously, we would say something like "tor-fw-helper sent us a
21048 string we could not parse".) Fixes bug 9781; bugfix
21051 o Minor bugfixes (relay, threading):
21052 - Check return code on spawn_func() in cpuworker code, so that we
21053 don't think we've spawned a nonworking cpuworker and write junk to
21054 it forever. Fix related to bug 4345; bugfix on all released Tor
21055 versions. Found by "skruffy".
21056 - Use a pthread_attr to make sure that spawn_func() cannot return an
21057 error while at the same time launching a thread. Fix related to
21058 bug 4345; bugfix on all released Tor versions. Reported
21061 o Minor bugfixes (relay, oom prevention):
21062 - Correctly detect the total available system memory. We tried to do
21063 this in 0.2.5.4-alpha, but the code was set up to always return an
21064 error value, even on success. Fixes bug 11805; bugfix
21067 o Minor bugfixes (relay, other):
21068 - We now drop CREATE cells for already-existent circuit IDs and for
21069 zero-valued circuit IDs, regardless of other factors that might
21070 otherwise have called for DESTROY cells. Fixes bug 12191; bugfix
21072 - Avoid an illegal read from stack when initializing the TLS module
21073 using a version of OpenSSL without all of the ciphers used by the
21074 v2 link handshake. Fixes bug 12227; bugfix on 0.2.4.8-alpha. Found
21076 - When rejecting DATA cells for stream_id zero, still count them
21077 against the circuit's deliver window so that we don't fail to send
21078 a SENDME. Fixes bug 11246; bugfix on 0.2.4.10-alpha.
21080 o Minor bugfixes (logging):
21081 - Fix a misformatted log message about delayed directory fetches.
21082 Fixes bug 11654; bugfix on 0.2.5.3-alpha.
21083 - Squelch a spurious LD_BUG message "No origin circuit for
21084 successful SOCKS stream" in certain hidden service failure cases;
21088 - Include a tor.service file in contrib/dist for use with systemd.
21089 Some distributions will be able to use this file unmodified;
21090 others will need to tweak it, or write their own. Patch from Jamie
21091 Nguyen; resolves ticket 8368.
21094 - Clean up several option names in the manpage to match their real
21095 names, add the missing documentation for a couple of testing and
21096 directory authority options, remove the documentation for a
21097 V2-directory fetching option that no longer exists. Resolves
21099 - Correct the documentation so that it lists the correct directory
21100 for the stats files. (They are in a subdirectory called "stats",
21102 - In the manpage, move more authority-only options into the
21103 directory authority section so that operators of regular directory
21104 caches don't get confused.
21107 - The contrib directory has been sorted and tidied. Before, it was
21108 an unsorted dumping ground for useful and not-so-useful things.
21109 Now, it is divided based on functionality, and the items which
21110 seemed to be nonfunctional or useless have been removed. Resolves
21111 ticket 8966; based on patches from "rl1987".
21114 - Remove /tor/dbg-stability.txt URL that was meant to help debug WFU
21115 and MTBF calculations, but that nobody was using. Fixes ticket 11742.
21116 - The TunnelDirConns and PreferTunnelledDirConns options no longer
21117 exist; tunneled directory connections have been available since
21118 0.1.2.5-alpha, and turning them off is not a good idea. This is a
21119 brute-force fix for 10849, where "TunnelDirConns 0" would break
21123 Changes in version 0.2.4.22 - 2014-05-16
21124 Tor 0.2.4.22 backports numerous high-priority fixes from the Tor 0.2.5
21125 alpha release series. These include blocking all authority signing
21126 keys that may have been affected by the OpenSSL "heartbleed" bug,
21127 choosing a far more secure set of TLS ciphersuites by default, closing
21128 a couple of memory leaks that could be used to run a target relay out
21129 of RAM, and several others.
21131 o Major features (security, backport from 0.2.5.4-alpha):
21132 - Block authority signing keys that were used on authorities
21133 vulnerable to the "heartbleed" bug in OpenSSL (CVE-2014-0160). (We
21134 don't have any evidence that these keys _were_ compromised; we're
21135 doing this to be prudent.) Resolves ticket 11464.
21137 o Major bugfixes (security, OOM):
21138 - Fix a memory leak that could occur if a microdescriptor parse
21139 fails during the tokenizing step. This bug could enable a memory
21140 exhaustion attack by directory servers. Fixes bug 11649; bugfix
21143 o Major bugfixes (TLS cipher selection, backport from 0.2.5.4-alpha):
21144 - The relay ciphersuite list is now generated automatically based on
21145 uniform criteria, and includes all OpenSSL ciphersuites with
21146 acceptable strength and forward secrecy. Previously, we had left
21147 some perfectly fine ciphersuites unsupported due to omission or
21148 typo. Resolves bugs 11513, 11492, 11498, 11499. Bugs reported by
21149 'cypherpunks'. Bugfix on 0.2.4.8-alpha.
21150 - Relays now trust themselves to have a better view than clients of
21151 which TLS ciphersuites are better than others. (Thanks to bug
21152 11513, the relay list is now well-considered, whereas the client
21153 list has been chosen mainly for anti-fingerprinting purposes.)
21154 Relays prefer: AES over 3DES; then ECDHE over DHE; then GCM over
21155 CBC; then SHA384 over SHA256 over SHA1; and last, AES256 over
21156 AES128. Resolves ticket 11528.
21157 - Clients now try to advertise the same list of ciphersuites as
21158 Firefox 28. This change enables selection of (fast) GCM
21159 ciphersuites, disables some strange old ciphers, and stops
21160 advertising the ECDH (not to be confused with ECDHE) ciphersuites.
21161 Resolves ticket 11438.
21163 o Minor bugfixes (configuration, security):
21164 - When running a hidden service, do not allow TunneledDirConns 0:
21165 trying to set that option together with a hidden service would
21166 otherwise prevent the hidden service from running, and also make
21167 it publish its descriptors directly over HTTP. Fixes bug 10849;
21168 bugfix on 0.2.1.1-alpha.
21170 o Minor bugfixes (controller, backport from 0.2.5.4-alpha):
21171 - Avoid sending a garbage value to the controller when a circuit is
21172 cannibalized. Fixes bug 11519; bugfix on 0.2.3.11-alpha.
21174 o Minor bugfixes (exit relay, backport from 0.2.5.4-alpha):
21175 - Stop leaking memory when we successfully resolve a PTR record.
21176 Fixes bug 11437; bugfix on 0.2.4.7-alpha.
21178 o Minor bugfixes (bridge client, backport from 0.2.5.4-alpha):
21179 - Avoid 60-second delays in the bootstrapping process when Tor is
21180 launching for a second time while using bridges. Fixes bug 9229;
21181 bugfix on 0.2.0.3-alpha.
21183 o Minor bugfixes (relays and bridges, backport from 0.2.5.4-alpha):
21184 - Give the correct URL in the warning message when trying to run a
21185 relay on an ancient version of Windows. Fixes bug 9393.
21187 o Minor bugfixes (compilation):
21188 - Fix a compilation error when compiling with --disable-curve25519.
21189 Fixes bug 9700; bugfix on 0.2.4.17-rc.
21192 - Downgrade the warning severity for the the "md was still
21193 referenced 1 node(s)" warning. Tor 0.2.5.4-alpha has better code
21194 for trying to diagnose this bug, and the current warning in
21195 earlier versions of tor achieves nothing useful. Addresses warning
21198 o Minor features (log verbosity, backport from 0.2.5.4-alpha):
21199 - When we run out of usable circuit IDs on a channel, log only one
21200 warning for the whole channel, and describe how many circuits
21201 there were on the channel. Fixes part of ticket 11553.
21203 o Minor features (security, backport from 0.2.5.4-alpha):
21204 - Decrease the lower limit of MaxMemInCellQueues to 256 MBytes (but
21205 leave the default at 8GBytes), to better support Raspberry Pi
21206 users. Fixes bug 9686; bugfix on 0.2.4.14-alpha.
21208 o Documentation (backport from 0.2.5.4-alpha):
21209 - Correctly document that we search for a system torrc file before
21210 looking in ~/.torrc. Fixes documentation side of 9213; bugfix on
21214 Changes in version 0.2.5.4-alpha - 2014-04-25
21215 Tor 0.2.5.4-alpha includes several security and performance
21216 improvements for clients and relays, including blacklisting authority
21217 signing keys that were used while susceptible to the OpenSSL
21218 "heartbleed" bug, fixing two expensive functions on busy relays,
21219 improved TLS ciphersuite preference lists, support for run-time
21220 hardening on compilers that support AddressSanitizer, and more work on
21221 the Linux sandbox code.
21223 There are also several usability fixes for clients (especially clients
21224 that use bridges), two new TransPort protocols supported (one on
21225 OpenBSD, one on FreeBSD), and various other bugfixes.
21227 This release marks end-of-life for Tor 0.2.2.x; those Tor versions
21228 have accumulated many known flaws; everyone should upgrade.
21230 o Major features (security):
21231 - If you don't specify MaxMemInQueues yourself, Tor now tries to
21232 pick a good value based on your total system memory. Previously,
21233 the default was always 8 GB. You can still override the default by
21234 setting MaxMemInQueues yourself. Resolves ticket 11396.
21235 - Block authority signing keys that were used on authorities
21236 vulnerable to the "heartbleed" bug in OpenSSL (CVE-2014-0160). (We
21237 don't have any evidence that these keys _were_ compromised; we're
21238 doing this to be prudent.) Resolves ticket 11464.
21240 o Major features (relay performance):
21241 - Speed up server-side lookups of rendezvous and introduction point
21242 circuits by using hashtables instead of linear searches. These
21243 functions previously accounted between 3 and 7% of CPU usage on
21244 some busy relays. Resolves ticket 9841.
21245 - Avoid wasting CPU when extending a circuit over a channel that is
21246 nearly out of circuit IDs. Previously, we would do a linear scan
21247 over possible circuit IDs before finding one or deciding that we
21248 had exhausted our possibilities. Now, we try at most 64 random
21249 circuit IDs before deciding that we probably won't succeed. Fixes
21250 a possible root cause of ticket 11553.
21252 o Major features (seccomp2 sandbox, Linux only):
21253 - The seccomp2 sandbox can now run a test network for multiple hours
21254 without crashing. The sandbox is still experimental, and more bugs
21255 will probably turn up. To try it, enable "Sandbox 1" on a Linux
21256 host. Resolves ticket 11351.
21257 - Strengthen sandbox code: the sandbox can now test the arguments
21258 for rename(), and blocks _sysctl() entirely. Resolves another part
21260 - When the sandbox blocks a system call, it now tries to log a stack
21261 trace before exiting. Resolves ticket 11465.
21263 o Major bugfixes (TLS cipher selection):
21264 - The relay ciphersuite list is now generated automatically based on
21265 uniform criteria, and includes all OpenSSL ciphersuites with
21266 acceptable strength and forward secrecy. Previously, we had left
21267 some perfectly fine ciphersuites unsupported due to omission or
21268 typo. Resolves bugs 11513, 11492, 11498, 11499. Bugs reported by
21269 'cypherpunks'. Bugfix on 0.2.4.8-alpha.
21270 - Relays now trust themselves to have a better view than clients of
21271 which TLS ciphersuites are better than others. (Thanks to bug
21272 11513, the relay list is now well-considered, whereas the client
21273 list has been chosen mainly for anti-fingerprinting purposes.)
21274 Relays prefer: AES over 3DES; then ECDHE over DHE; then GCM over
21275 CBC; then SHA384 over SHA256 over SHA1; and last, AES256 over
21276 AES128. Resolves ticket 11528.
21277 - Clients now try to advertise the same list of ciphersuites as
21278 Firefox 28. This change enables selection of (fast) GCM
21279 ciphersuites, disables some strange old ciphers, and stops
21280 advertising the ECDH (not to be confused with ECDHE) ciphersuites.
21281 Resolves ticket 11438.
21283 o Major bugfixes (bridge client):
21284 - Avoid 60-second delays in the bootstrapping process when Tor is
21285 launching for a second time while using bridges. Fixes bug 9229;
21286 bugfix on 0.2.0.3-alpha.
21288 o Minor features (transparent proxy, *BSD):
21289 - Support FreeBSD's ipfw firewall interface for TransPort ports on
21290 FreeBSD. To enable it, set "TransProxyType ipfw". Resolves ticket
21291 10267; patch from "yurivict".
21292 - Support OpenBSD's divert-to rules with the pf firewall for
21293 transparent proxy ports. To enable it, set "TransProxyType
21294 pf-divert". This allows Tor to run a TransPort transparent proxy
21295 port on OpenBSD 4.4 or later without root privileges. See the
21296 pf.conf(5) manual page for information on configuring pf to use
21297 divert-to rules. Closes ticket 10896; patch from Dana Koch.
21299 o Minor features (security):
21300 - New --enable-expensive-hardening option to enable security
21301 hardening options that consume nontrivial amounts of CPU and
21302 memory. Right now, this includes AddressSanitizer and UbSan, which
21303 are supported in newer versions of GCC and Clang. Closes ticket
21306 o Minor features (log verbosity):
21307 - Demote the message that we give when a flushing connection times
21308 out for too long from NOTICE to INFO. It was usually meaningless.
21309 Resolves ticket 5286.
21310 - Don't log so many notice-level bootstrapping messages at startup
21311 about downloading descriptors. Previously, we'd log a notice
21312 whenever we learned about more routers. Now, we only log a notice
21313 at every 5% of progress. Fixes bug 9963.
21314 - Warn less verbosely when receiving a malformed
21315 ESTABLISH_RENDEZVOUS cell. Fixes ticket 11279.
21316 - When we run out of usable circuit IDs on a channel, log only one
21317 warning for the whole channel, and describe how many circuits
21318 there were on the channel. Fixes part of ticket 11553.
21320 o Minor features (relay):
21321 - If a circuit timed out for at least 3 minutes, check if we have a
21322 new external IP address, and publish a new descriptor with the new
21323 IP address if it changed. Resolves ticket 2454.
21325 o Minor features (controller):
21326 - Make the entire exit policy available from the control port via
21327 GETINFO exit-policy/*. Implements enhancement 7952. Patch from
21329 - Because of the fix for ticket 11396, the real limit for memory
21330 usage may no longer match the configured MaxMemInQueues value. The
21331 real limit is now exposed via GETINFO limits/max-mem-in-queues.
21333 o Minor features (bridge client):
21334 - Report a more useful failure message when we can't connect to a
21335 bridge because we don't have the right pluggable transport
21336 configured. Resolves ticket 9665. Patch from Fábio J. Bertinatto.
21338 o Minor features (diagnostic):
21339 - Add more log messages to diagnose bug 7164, which causes
21340 intermittent "microdesc_free() called but md was still referenced"
21341 warnings. We now include more information, to figure out why we
21342 might be cleaning a microdescriptor for being too old if it's
21343 still referenced by a live node_t object.
21345 o Minor bugfixes (client, DNSPort):
21346 - When using DNSPort, try to respond to AAAA requests with AAAA
21347 answers. Previously, we hadn't looked at the request type when
21348 deciding which answer type to prefer. Fixes bug 10468; bugfix on
21350 - When receiving a DNS query for an unsupported record type, reply
21351 with no answer rather than with a NOTIMPL error. This behavior
21352 isn't correct either, but it will break fewer client programs, we
21353 hope. Fixes bug 10268; bugfix on 0.2.0.1-alpha. Original patch
21356 o Minor bugfixes (exit relay):
21357 - Stop leaking memory when we successfully resolve a PTR record.
21358 Fixes bug 11437; bugfix on 0.2.4.7-alpha.
21360 o Minor bugfixes (bridge client):
21361 - Stop accepting bridge lines containing hostnames. Doing so would
21362 cause clients to perform DNS requests on the hostnames, which was
21363 not sensible behavior. Fixes bug 10801; bugfix on 0.2.0.1-alpha.
21364 - Avoid a 60-second delay in the bootstrapping process when a Tor
21365 client with pluggable transports re-reads its configuration at
21366 just the wrong time. Re-fixes bug 11156; bugfix on 0.2.5.3-alpha.
21368 o Minor bugfixes (client, logging during bootstrap):
21369 - Warn only once if we start logging in an unsafe way. Previously,
21370 we complain as many times as we had problems. Fixes bug 9870;
21371 bugfix on 0.2.5.1-alpha.
21372 - Only report the first fatal bootstrap error on a given OR
21373 connection. This stops us from telling the controller bogus error
21374 messages like "DONE". Fixes bug 10431; bugfix on 0.2.1.1-alpha.
21375 - Be more helpful when trying to run sandboxed on Linux without
21376 libseccomp. Instead of saying "Sandbox is not implemented on this
21377 platform", we now explain that we need to be built with
21378 libseccomp. Fixes bug 11543; bugfix on 0.2.5.1-alpha.
21379 - Avoid generating spurious warnings when starting with
21380 DisableNetwork enabled. Fixes bug 11200 and bug 10405; bugfix on
21383 o Minor bugfixes (closing OR connections):
21384 - If write_to_buf() in connection_write_to_buf_impl_() ever fails,
21385 check if it's an or_connection_t and correctly call
21386 connection_or_close_for_error() rather than
21387 connection_mark_for_close() directly. Fixes bug 11304; bugfix on
21389 - When closing all connections on setting DisableNetwork to 1, use
21390 connection_or_close_normally() rather than closing OR connections
21391 out from under the channel layer. Fixes bug 11306; bugfix on
21394 o Minor bugfixes (controller):
21395 - Avoid sending a garbage value to the controller when a circuit is
21396 cannibalized. Fixes bug 11519; bugfix on 0.2.3.11-alpha.
21398 o Minor bugfixes (tor-fw-helper):
21399 - Allow tor-fw-helper to build again by adding src/ext to its
21400 CPPFLAGS. Fixes bug 11296; bugfix on 0.2.5.3-alpha.
21402 o Minor bugfixes (bridges):
21403 - Avoid potential crashes or bad behavior when launching a
21404 server-side managed proxy with ORPort or ExtORPort temporarily
21405 disabled. Fixes bug 9650; bugfix on 0.2.3.16-alpha.
21407 o Minor bugfixes (platform-specific):
21408 - Fix compilation on Solaris, which does not have <endian.h>. Fixes
21409 bug 11426; bugfix on 0.2.5.3-alpha.
21410 - When dumping a malformed directory object to disk, save it in
21411 binary mode on Windows, not text mode. Fixes bug 11342; bugfix on
21413 - Don't report failures from make_socket_reuseable() on incoming
21414 sockets on OSX: this can happen when incoming connections close
21415 early. Fixes bug 10081.
21417 o Minor bugfixes (trivial memory leaks):
21418 - Fix a small memory leak when signing a directory object. Fixes bug
21419 11275; bugfix on 0.2.4.13-alpha.
21420 - Free placeholder entries in our circuit table at exit; fixes a
21421 harmless memory leak. Fixes bug 11278; bugfix on 0.2.5.1-alpha.
21422 - Don't re-initialize a second set of OpenSSL mutexes when starting
21423 up. Previously, we'd make one set of mutexes, and then immediately
21424 replace them with another. Fixes bug 11726; bugfix on
21426 - Resolve some memory leaks found by coverity in the unit tests, on
21427 exit in tor-gencert, and on a failure to compute digests for our
21428 own keys when generating a v3 networkstatus vote. These leaks
21429 should never have affected anyone in practice.
21431 o Minor bugfixes (hidden service):
21432 - Only retry attempts to connect to a chosen rendezvous point 8
21433 times, not 30. Fixes bug 4241; bugfix on 0.1.0.1-rc.
21435 o Minor bugfixes (misc code correctness):
21436 - Fix various instances of undefined behavior in channeltls.c,
21437 tor_memmem(), and eventdns.c that would cause us to construct
21438 pointers to memory outside an allocated object. (These invalid
21439 pointers were not accessed, but C does not even allow them to
21440 exist.) Fixes bug 10363; bugfixes on 0.1.1.1-alpha, 0.1.2.1-alpha,
21441 0.2.0.10-alpha, and 0.2.3.6-alpha. Reported by "bobnomnom".
21442 - Use the AddressSanitizer and Ubsan sanitizers (in clang-3.4) to
21443 fix some miscellaneous errors in our tests and codebase. Fixes bug
21444 11232. Bugfixes on versions back as far as 0.2.1.11-alpha.
21445 - Always check return values for unlink, munmap, UnmapViewOfFile;
21446 check strftime return values more often. In some cases all we can
21447 do is report a warning, but this may help prevent deeper bugs from
21448 going unnoticed. Closes ticket 8787; bugfixes on many, many tor
21450 - Fix numerous warnings from the clang "scan-build" static analyzer.
21451 Some of these are programming style issues; some of them are false
21452 positives that indicated awkward code; some are undefined behavior
21453 cases related to constructing (but not using) invalid pointers;
21454 some are assumptions about API behavior; some are (harmlessly)
21455 logging sizeof(ptr) bytes from a token when sizeof(*ptr) would be
21456 correct; and one or two are genuine bugs that weren't reachable
21457 from the rest of the program. Fixes bug 8793; bugfixes on many,
21461 - Build the torify.1 manpage again. Previously, we were only trying
21462 to build it when also building tor-fw-helper. That's why we didn't
21463 notice that we'd broken the ability to build it. Fixes bug 11321;
21464 bugfix on 0.2.5.1-alpha.
21465 - Fix the layout of the SOCKSPort flags in the manpage. Fixes bug
21466 11061; bugfix on 0.2.4.7-alpha.
21467 - Correctly document that we search for a system torrc file before
21468 looking in ~/.torrc. Fixes documentation side of 9213; bugfix on
21470 - Resolve warnings from Doxygen.
21472 o Code simplifications and refactoring:
21473 - Remove is_internal_IP() function. Resolves ticket 4645.
21474 - Remove unused function circuit_dump_by_chan from circuitlist.c.
21475 Closes issue 9107; patch from "marek".
21476 - Change our use of the ENUM_BF macro to avoid declarations that
21479 o Deprecated versions:
21480 - Tor 0.2.2.x has reached end-of-life; it has received no patches or
21481 attention for some while. Directory authorities no longer accept
21482 descriptors from relays running any version of Tor prior to Tor
21483 0.2.3.16-alpha. Resolves ticket 11149.
21486 - New macros in test.h to simplify writing mock-functions for unit
21487 tests. Part of ticket 11507. Patch from Dana Koch.
21488 - Complete tests for the status.c module. Resolves ticket 11507.
21489 Patch from Dana Koch.
21492 - Remove all code for the long unused v1 directory protocol.
21493 Resolves ticket 11070.
21496 Changes in version 0.2.5.3-alpha - 2014-03-22
21497 Tor 0.2.5.3-alpha includes all the fixes from 0.2.4.21. It contains
21498 two new anti-DoS features for Tor relays, resolves a bug that kept
21499 SOCKS5 support for IPv6 from working, fixes several annoying usability
21500 issues for bridge users, and removes more old code for unused
21503 The Tor 0.2.5.x release series is now in patch-freeze: no feature
21504 patches not already written will be considered for inclusion in 0.2.5.x.
21506 o Major features (relay security, DoS-resistance):
21507 - When deciding whether we have run out of memory and we need to
21508 close circuits, also consider memory allocated in buffers for
21509 streams attached to each circuit.
21511 This change, which extends an anti-DoS feature introduced in
21512 0.2.4.13-alpha and improved in 0.2.4.14-alpha, lets Tor exit relays
21513 better resist more memory-based DoS attacks than before. Since the
21514 MaxMemInCellQueues option now applies to all queues, it is renamed
21515 to MaxMemInQueues. This feature fixes bug 10169.
21516 - Avoid hash-flooding denial-of-service attacks by using the secure
21517 SipHash-2-4 hash function for our hashtables. Without this
21518 feature, an attacker could degrade performance of a targeted
21519 client or server by flooding their data structures with a large
21520 number of entries to be stored at the same hash table position,
21521 thereby slowing down the Tor instance. With this feature, hash
21522 table positions are derived from a randomized cryptographic key,
21523 and an attacker cannot predict which entries will collide. Closes
21525 - Decrease the lower limit of MaxMemInQueues to 256 MBytes (but leave
21526 the default at 8GBytes), to better support Raspberry Pi users. Fixes
21527 bug 9686; bugfix on 0.2.4.14-alpha.
21529 o Minor features (bridges, pluggable transports):
21530 - Bridges now write the SHA1 digest of their identity key
21531 fingerprint (that is, a hash of a hash of their public key) to
21532 notice-level logs, and to a new hashed-fingerprint file. This
21533 information will help bridge operators look up their bridge in
21534 Globe and similar tools. Resolves ticket 10884.
21535 - Improve the message that Tor displays when running as a bridge
21536 using pluggable transports without an Extended ORPort listener.
21537 Also, log the message in the log file too. Resolves ticket 11043.
21539 o Minor features (other):
21540 - Add a new option, PredictedPortsRelevanceTime, to control how long
21541 after having received a request to connect to a given port Tor
21542 will try to keep circuits ready in anticipation of future requests
21543 for that port. Patch from "unixninja92"; implements ticket 9176.
21544 - Generate a warning if any ports are listed in the SocksPolicy,
21545 DirPolicy, AuthDirReject, AuthDirInvalid, AuthDirBadDir, or
21546 AuthDirBadExit options. (These options only support address
21547 ranges.) Fixes part of ticket 11108.
21548 - Update geoip and geoip6 to the February 7 2014 Maxmind GeoLite2
21551 o Minor bugfixes (new since 0.2.5.2-alpha, also in 0.2.4.21):
21552 - Build without warnings under clang 3.4. (We have some macros that
21553 define static functions only some of which will get used later in
21554 the module. Starting with clang 3.4, these give a warning unless the
21555 unused attribute is set on them.) Resolves ticket 10904.
21556 - Fix build warnings about missing "a2x" comment when building the
21557 manpages from scratch on OpenBSD; OpenBSD calls it "a2x.py".
21558 Fixes bug 10929; bugfix on 0.2.2.9-alpha. Patch from Dana Koch.
21560 o Minor bugfixes (client):
21561 - Improve the log message when we can't connect to a hidden service
21562 because all of the hidden service directory nodes hosting its
21563 descriptor are excluded. Improves on our fix for bug 10722, which
21564 was a bugfix on 0.2.0.10-alpha.
21565 - Raise a control port warning when we fail to connect to all of
21566 our bridges. Previously, we didn't inform the controller, and
21567 the bootstrap process would stall. Fixes bug 11069; bugfix on
21569 - Exit immediately when a process-owning controller exits.
21570 Previously, tor relays would wait for a little while after their
21571 controller exited, as if they had gotten an INT signal -- but this
21572 was problematic, since there was no feedback for the user. To do a
21573 clean shutdown, controllers should send an INT signal and give Tor
21574 a chance to clean up. Fixes bug 10449; bugfix on 0.2.2.28-beta.
21575 - Stop attempting to connect to bridges before our pluggable
21576 transports are configured (harmless but resulted in some erroneous
21577 log messages). Fixes bug 11156; bugfix on 0.2.3.2-alpha.
21578 - Fix connections to IPv6 addresses over SOCKS5. Previously, we were
21579 generating incorrect SOCKS5 responses, and confusing client
21580 applications. Fixes bug 10987; bugfix on 0.2.4.7-alpha.
21582 o Minor bugfixes (relays and bridges):
21583 - Avoid crashing on a malformed resolv.conf file when running a
21584 relay using Libevent 1. Fixes bug 8788; bugfix on 0.1.1.23.
21585 - Non-exit relays no longer launch mock DNS requests to check for
21586 DNS hijacking. This has been unnecessary since 0.2.1.7-alpha, when
21587 non-exit relays stopped servicing DNS requests. Fixes bug 965;
21588 bugfix on 0.2.1.7-alpha. Patch from Matt Pagan.
21589 - Bridges now report complete directory request statistics. Related
21590 to bug 5824; bugfix on 0.2.2.1-alpha.
21591 - Bridges now never collect statistics that were designed for
21592 relays. Fixes bug 5824; bugfix on 0.2.3.8-alpha.
21593 - Stop giving annoying warning messages when we decide not to launch
21594 a pluggable transport proxy that we don't need (because there are
21595 no bridges configured to use it). Resolves ticket 5018; bugfix
21597 - Give the correct URL in the warning message when trying to run a
21598 relay on an ancient version of Windows. Fixes bug 9393.
21600 o Minor bugfixes (backtrace support):
21601 - Support automatic backtraces on more platforms by using the
21602 "-fasynchronous-unwind-tables" compiler option. This option is
21603 needed for platforms like 32-bit Intel where "-fomit-frame-pointer"
21604 is on by default and table generation is not. This doesn't yet
21605 add Windows support; only Linux, OSX, and some BSDs are affected.
21606 Reported by 'cypherpunks'; fixes bug 11047; bugfix on 0.2.5.2-alpha.
21607 - Avoid strange behavior if two threads hit failed assertions at the
21608 same time and both try to log backtraces at once. (Previously, if
21609 this had happened, both threads would have stored their intermediate
21610 results in the same buffer, and generated junk outputs.) Reported by
21611 "cypherpunks". Fixes bug 11048; bugfix on 0.2.5.2-alpha.
21612 - Fix a compiler warning in format_number_sigsafe(). Bugfix on
21613 0.2.5.2-alpha; patch from Nick Hopper.
21615 o Minor bugfixes (unit tests):
21616 - Fix a small bug in the unit tests that might have made the tests
21617 call 'chmod' with an uninitialized bitmask. Fixes bug 10928;
21618 bugfix on 0.2.5.1-alpha. Patch from Dana Koch.
21621 - Remove all remaining code related to version-0 hidden service
21622 descriptors: they have not been in use since 0.2.2.1-alpha. Fixes
21623 the rest of bug 10841.
21626 - Document in the manpage that "KBytes" may also be written as
21627 "kilobytes" or "KB", that "Kbits" may also be written as
21628 "kilobits", and so forth. Closes ticket 9222.
21629 - Document that the ClientOnly config option overrides ORPort.
21630 Our old explanation made ClientOnly sound as though it did
21631 nothing at all. Resolves bug 9059.
21632 - Explain that SocksPolicy, DirPolicy, and similar options don't
21633 take port arguments. Fixes the other part of ticket 11108.
21634 - Fix a comment about the rend_server_descriptor_t.protocols field
21635 to more accurately describe its range. Also, make that field
21636 unsigned, to more accurately reflect its usage. Fixes bug 9099;
21637 bugfix on 0.2.1.5-alpha.
21638 - Fix the manpage's description of HiddenServiceAuthorizeClient:
21639 the maximum client name length is 16, not 19. Fixes bug 11118;
21640 bugfix on 0.2.1.6-alpha.
21642 o Code simplifications and refactoring:
21643 - Get rid of router->address, since in all cases it was just the
21644 string representation of router->addr. Resolves ticket 5528.
21646 o Test infrastructure:
21647 - Update to the latest version of tinytest.
21648 - Improve the tinytest implementation of string operation tests so
21649 that comparisons with NULL strings no longer crash the tests; they
21650 now just fail, normally. Fixes bug 9004; bugfix on 0.2.2.4-alpha.
21653 Changes in version 0.2.4.21 - 2014-02-28
21654 Tor 0.2.4.21 further improves security against potential adversaries who
21655 find breaking 1024-bit crypto doable, and backports several stability
21656 and robustness patches from the 0.2.5 branch.
21658 o Major features (client security):
21659 - When we choose a path for a 3-hop circuit, make sure it contains
21660 at least one relay that supports the NTor circuit extension
21661 handshake. Otherwise, there is a chance that we're building
21662 a circuit that's worth attacking by an adversary who finds
21663 breaking 1024-bit crypto doable, and that chance changes the game
21664 theory. Implements ticket 9777.
21667 - Do not treat streams that fail with reason
21668 END_STREAM_REASON_INTERNAL as indicating a definite circuit failure,
21669 since it could also indicate an ENETUNREACH connection error. Fixes
21670 part of bug 10777; bugfix on 0.2.4.8-alpha.
21672 o Code simplification and refactoring:
21673 - Remove data structures which were introduced to implement the
21674 CellStatistics option: they are now redundant with the new timestamp
21675 field in the regular packed_cell_t data structure, which we did
21676 in 0.2.4.18-rc in order to resolve bug 9093. Resolves ticket 10870.
21679 - Always clear OpenSSL bignums before freeing them -- even bignums
21680 that don't contain secrets. Resolves ticket 10793. Patch by
21682 - Build without warnings under clang 3.4. (We have some macros that
21683 define static functions only some of which will get used later in
21684 the module. Starting with clang 3.4, these give a warning unless the
21685 unused attribute is set on them.) Resolves ticket 10904.
21686 - Update geoip and geoip6 files to the February 7 2014 Maxmind
21687 GeoLite2 Country database.
21690 - Set the listen() backlog limit to the largest actually supported
21691 on the system, not to the value in a header file. Fixes bug 9716;
21692 bugfix on every released Tor.
21693 - Treat ENETUNREACH, EACCES, and EPERM connection failures at an
21694 exit node as a NOROUTE error, not an INTERNAL error, since they
21695 can apparently happen when trying to connect to the wrong sort
21696 of netblocks. Fixes part of bug 10777; bugfix on 0.1.0.1-rc.
21697 - Fix build warnings about missing "a2x" comment when building the
21698 manpages from scratch on OpenBSD; OpenBSD calls it "a2x.py".
21699 Fixes bug 10929; bugfix on 0.2.2.9-alpha. Patch from Dana Koch.
21700 - Avoid a segfault on SIGUSR1, where we had freed a connection but did
21701 not entirely remove it from the connection lists. Fixes bug 9602;
21702 bugfix on 0.2.4.4-alpha.
21703 - Fix a segmentation fault in our benchmark code when running with
21704 Fedora's OpenSSL package, or any other OpenSSL that provides
21705 ECDH but not P224. Fixes bug 10835; bugfix on 0.2.4.8-alpha.
21706 - Turn "circuit handshake stats since last time" log messages into a
21707 heartbeat message. Fixes bug 10485; bugfix on 0.2.4.17-rc.
21709 o Documentation fixes:
21710 - Document that all but one DirPort entry must have the NoAdvertise
21711 flag set. Fixes bug 10470; bugfix on 0.2.3.3-alpha / 0.2.3.16-alpha.
21714 Changes in version 0.2.5.2-alpha - 2014-02-13
21715 Tor 0.2.5.2-alpha includes all the fixes from 0.2.4.18-rc and 0.2.4.20,
21716 like the "poor random number generation" fix and the "building too many
21717 circuits" fix. It also further improves security against potential
21718 adversaries who find breaking 1024-bit crypto doable, and launches
21719 pluggable transports on demand (which gets us closer to integrating
21720 pluggable transport support by default -- not to be confused with Tor
21721 bundles enabling pluggable transports and bridges by default).
21723 o Major features (client security):
21724 - When we choose a path for a 3-hop circuit, make sure it contains
21725 at least one relay that supports the NTor circuit extension
21726 handshake. Otherwise, there is a chance that we're building
21727 a circuit that's worth attacking by an adversary who finds
21728 breaking 1024-bit crypto doable, and that chance changes the game
21729 theory. Implements ticket 9777.
21730 - Clients now look at the "usecreatefast" consensus parameter to
21731 decide whether to use CREATE_FAST or CREATE cells for the first hop
21732 of their circuit. This approach can improve security on connections
21733 where Tor's circuit handshake is stronger than the available TLS
21734 connection security levels, but the tradeoff is more computational
21735 load on guard relays. Implements proposal 221. Resolves ticket 9386.
21737 o Major features (bridges):
21738 - Don't launch pluggable transport proxies if we don't have any
21739 bridges configured that would use them. Now we can list many
21740 pluggable transports, and Tor will dynamically start one when it
21741 hears a bridge address that needs it. Resolves ticket 5018.
21742 - The bridge directory authority now assigns status flags (Stable,
21743 Guard, etc) to bridges based on thresholds calculated over all
21744 Running bridges. Now bridgedb can finally make use of its features
21745 to e.g. include at least one Stable bridge in its answers. Fixes
21748 o Major features (other):
21749 - Extend ORCONN controller event to include an "ID" parameter,
21750 and add four new controller event types CONN_BW, CIRC_BW,
21751 CELL_STATS, and TB_EMPTY that show connection and circuit usage.
21752 The new events are emitted in private Tor networks only, with the
21753 goal of being able to better track performance and load during
21754 full-network simulations. Implements proposal 218 and ticket 7359.
21755 - On some platforms (currently: recent OSX versions, glibc-based
21756 platforms that support the ELF format, and a few other
21757 Unix-like operating systems), Tor can now dump stack traces
21758 when a crash occurs or an assertion fails. By default, traces
21759 are dumped to stderr (if possible) and to any logs that are
21760 reporting errors. Implements ticket 9299.
21763 - Avoid a segfault on SIGUSR1, where we had freed a connection but did
21764 not entirely remove it from the connection lists. Fixes bug 9602;
21765 bugfix on 0.2.4.4-alpha.
21766 - Do not treat streams that fail with reason
21767 END_STREAM_REASON_INTERNAL as indicating a definite circuit failure,
21768 since it could also indicate an ENETUNREACH connection error. Fixes
21769 part of bug 10777; bugfix on 0.2.4.8-alpha.
21771 o Major bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.20):
21772 - Do not allow OpenSSL engines to replace the PRNG, even when
21773 HardwareAccel is set. The only default builtin PRNG engine uses
21774 the Intel RDRAND instruction to replace the entire PRNG, and
21775 ignores all attempts to seed it with more entropy. That's
21776 cryptographically stupid: the right response to a new alleged
21777 entropy source is never to discard all previously used entropy
21778 sources. Fixes bug 10402; works around behavior introduced in
21779 OpenSSL 1.0.0. Diagnosis and investigation thanks to "coderman"
21781 - Fix assertion failure when AutomapHostsOnResolve yields an IPv6
21782 address. Fixes bug 10465; bugfix on 0.2.4.7-alpha.
21783 - Avoid launching spurious extra circuits when a stream is pending.
21784 This fixes a bug where any circuit that _wasn't_ unusable for new
21785 streams would be treated as if it were, causing extra circuits to
21786 be launched. Fixes bug 10456; bugfix on 0.2.4.12-alpha.
21788 o Major bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
21789 - No longer stop reading or writing on cpuworker connections when
21790 our rate limiting buckets go empty. Now we should handle circuit
21791 handshake requests more promptly. Resolves bug 9731.
21792 - Stop trying to bootstrap all our directory information from
21793 only our first guard. Discovered while fixing bug 9946; bugfix
21796 o Minor features (bridges, pluggable transports):
21797 - Add threshold cutoffs to the networkstatus document created by
21798 the Bridge Authority. Fixes bug 1117.
21799 - On Windows, spawn background processes using the CREATE_NO_WINDOW
21800 flag. Now Tor Browser Bundle 3.5 with pluggable transports enabled
21801 doesn't pop up a blank console window. (In Tor Browser Bundle 2.x,
21802 Vidalia set this option for us.) Implements ticket 10297.
21804 o Minor features (security):
21805 - Always clear OpenSSL bignums before freeing them -- even bignums
21806 that don't contain secrets. Resolves ticket 10793. Patch by
21809 o Minor features (config options and command line):
21810 - Add an --allow-missing-torrc commandline option that tells Tor to
21811 run even if the configuration file specified by -f is not available.
21812 Implements ticket 10060.
21813 - Add support for the TPROXY transparent proxying facility on Linux.
21814 See documentation for the new TransProxyType option for more
21815 details. Implementation by "thomo". Closes ticket 10582.
21817 o Minor features (controller):
21818 - Add a new "HS_DESC" controller event that reports activities
21819 related to hidden service descriptors. Resolves ticket 8510.
21820 - New "DROPGUARDS" controller command to forget all current entry
21821 guards. Not recommended for ordinary use, since replacing guards
21822 too frequently makes several attacks easier. Resolves ticket 9934;
21825 o Minor features (build):
21826 - Assume that a user using ./configure --host wants to cross-compile,
21827 and give an error if we cannot find a properly named
21828 tool-chain. Add a --disable-tool-name-check option to proceed
21829 nevertheless. Addresses ticket 9869. Patch by Benedikt Gollatz.
21830 - If we run ./configure and the compiler recognizes -fstack-protector
21831 but the linker rejects it, warn the user about a potentially missing
21832 libssp package. Addresses ticket 9948. Patch from Benedikt Gollatz.
21834 o Minor features (testing):
21835 - If Python is installed, "make check" now runs extra tests beyond
21836 the unit test scripts.
21837 - When bootstrapping a test network, sometimes very few relays get
21838 the Guard flag. Now a new option "TestingDirAuthVoteGuard" can
21839 specify a set of relays which should be voted Guard regardless of
21840 their uptime or bandwidth. Addresses ticket 9206.
21842 o Minor features (log messages):
21843 - When ServerTransportPlugin is set on a bridge, Tor can write more
21844 useful statistics about bridge use in its extrainfo descriptors,
21845 but only if the Extended ORPort ("ExtORPort") is set too. Add a
21846 log message to inform the user in this case. Resolves ticket 9651.
21847 - When receiving a new controller connection, log the origin address.
21848 Resolves ticket 9698; patch from "sigpipe".
21849 - When logging OpenSSL engine status at startup, log the status of
21850 more engines. Fixes ticket 10043; patch from Joshua Datko.
21851 - Turn "circuit handshake stats since last time" log messages into a
21852 heartbeat message. Fixes bug 10485; bugfix on 0.2.4.17-rc.
21854 o Minor features (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
21855 - Improve the circuit queue out-of-memory handler. Previously, when
21856 we ran low on memory, we'd close whichever circuits had the most
21857 queued cells. Now, we close those that have the *oldest* queued
21858 cells, on the theory that those are most responsible for us
21859 running low on memory. Based on analysis from a forthcoming paper
21860 by Jansen, Tschorsch, Johnson, and Scheuermann. Fixes bug 9093.
21861 - Generate bootstrapping status update events correctly when fetching
21862 microdescriptors. Fixes bug 9927.
21863 - Update to the October 2 2013 Maxmind GeoLite Country database.
21865 o Minor bugfixes (clients):
21866 - When closing a channel that has already been open, do not close
21867 pending circuits that were waiting to connect to the same relay.
21868 Fixes bug 9880; bugfix on 0.2.5.1-alpha. Thanks to skruffy for
21871 o Minor bugfixes (relays):
21872 - Treat ENETUNREACH, EACCES, and EPERM connection failures at an
21873 exit node as a NOROUTE error, not an INTERNAL error, since they
21874 can apparently happen when trying to connect to the wrong sort
21875 of netblocks. Fixes part of bug 10777; bugfix on 0.1.0.1-rc.
21877 o Minor bugfixes (bridges):
21878 - Fix a bug where the first connection works to a bridge that uses a
21879 pluggable transport with client-side parameters, but we don't send
21880 the client-side parameters on subsequent connections. (We don't
21881 use any pluggable transports with client-side parameters yet,
21882 but ScrambleSuit will soon become the first one.) Fixes bug 9162;
21883 bugfix on 0.2.0.3-alpha. Based on a patch from "rl1987".
21885 o Minor bugfixes (node selection):
21886 - If ExcludeNodes is set, consider non-excluded hidden service
21887 directory servers before excluded ones. Do not consider excluded
21888 hidden service directory servers at all if StrictNodes is
21889 set. (Previously, we would sometimes decide to connect to those
21890 servers, and then realize before we initiated a connection that
21891 we had excluded them.) Fixes bug 10722; bugfix on 0.2.0.10-alpha.
21892 Reported by "mr-4".
21893 - If we set the ExitNodes option but it doesn't include any nodes
21894 that have the Exit flag, we would choose not to bootstrap. Now we
21895 bootstrap so long as ExitNodes includes nodes which can exit to
21896 some port. Fixes bug 10543; bugfix on 0.2.4.10-alpha.
21898 o Minor bugfixes (controller and command-line):
21899 - If changing a config option via "setconf" fails in a recoverable
21900 way, we used to nonetheless write our new control ports to the
21901 file described by the "ControlPortWriteToFile" option. Now we only
21902 write out that file if we successfully switch to the new config
21903 option. Fixes bug 5605; bugfix on 0.2.2.26-beta. Patch from "Ryman".
21904 - When a command-line option such as --version or --help that
21905 ordinarily implies --hush appears on the command line along with
21906 --quiet, then actually obey --quiet. Previously, we obeyed --quiet
21907 only if it appeared later on the command line. Fixes bug 9578;
21908 bugfix on 0.2.5.1-alpha.
21910 o Minor bugfixes (code correctness):
21911 - Previously we used two temporary files when writing descriptors to
21912 disk; now we only use one. Fixes bug 1376.
21913 - Remove an erroneous (but impossible and thus harmless) pointer
21914 comparison that would have allowed compilers to skip a bounds
21915 check in channeltls.c. Fixes bugs 10313 and 9980; bugfix on
21916 0.2.0.10-alpha. Noticed by Jared L Wong and David Fifield.
21917 - Fix an always-true assertion in pluggable transports code so it
21918 actually checks what it was trying to check. Fixes bug 10046;
21919 bugfix on 0.2.3.9-alpha. Found by "dcb".
21921 o Minor bugfixes (protocol correctness):
21922 - When receiving a VERSIONS cell with an odd number of bytes, close
21923 the connection immediately since the cell is malformed. Fixes bug
21924 10365; bugfix on 0.2.0.10-alpha. Spotted by "bobnomnom"; fix by
21927 o Minor bugfixes (build):
21928 - Restore the ability to compile Tor with V2_HANDSHAKE_SERVER
21929 turned off (that is, without support for v2 link handshakes). Fixes
21930 bug 4677; bugfix on 0.2.3.2-alpha. Patch from "piet".
21931 - Fix compilation warnings and startup issues when running with
21932 "Sandbox 1" and libseccomp-2.1.0. Fixes bug 10563; bugfix on
21934 - Fix compilation on Solaris 9, which didn't like us having an
21935 identifier named "sun". Fixes bug 10565; bugfix in 0.2.5.1-alpha.
21937 o Minor bugfixes (testing):
21938 - Fix a segmentation fault in our benchmark code when running with
21939 Fedora's OpenSSL package, or any other OpenSSL that provides
21940 ECDH but not P224. Fixes bug 10835; bugfix on 0.2.4.8-alpha.
21942 o Minor bugfixes (log messages):
21943 - Fix a bug where clients using bridges would report themselves
21944 as 50% bootstrapped even without a live consensus document.
21945 Fixes bug 9922; bugfix on 0.2.1.1-alpha.
21946 - Suppress a warning where, if there's only one directory authority
21947 in the network, we would complain that votes and signatures cannot
21948 be uploaded to other directory authorities. Fixes bug 10842;
21949 bugfix on 0.2.2.26-beta.
21950 - Report bootstrapping progress correctly when we're downloading
21951 microdescriptors. We had updated our "do we have enough microdescs
21952 to begin building circuits?" logic most recently in 0.2.4.10-alpha
21953 (see bug 5956), but we left the bootstrap status event logic at
21954 "how far through getting 1/4 of them are we?" Fixes bug 9958;
21955 bugfix on 0.2.2.36, which is where they diverged (see bug 5343).
21957 o Minor bugfixes (new since 0.2.5.1-alpha, also in 0.2.4.20):
21958 - Avoid a crash bug when starting with a corrupted microdescriptor
21959 cache file. Fixes bug 10406; bugfix on 0.2.2.6-alpha.
21960 - If we fail to dump a previously cached microdescriptor to disk, avoid
21961 freeing duplicate data later on. Fixes bug 10423; bugfix on
21962 0.2.4.13-alpha. Spotted by "bobnomnom".
21964 o Minor bugfixes on 0.2.4.x (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
21965 - Correctly log long IPv6 exit policies, instead of truncating them
21966 or reporting an error. Fixes bug 9596; bugfix on 0.2.4.7-alpha.
21967 - Our default TLS ecdhe groups were backwards: we meant to be using
21968 P224 for relays (for performance win) and P256 for bridges (since
21969 it is more common in the wild). Instead we had it backwards. After
21970 reconsideration, we decided that the default should be P256 on all
21971 hosts, since its security is probably better, and since P224 is
21972 reportedly used quite little in the wild. Found by "skruffy" on
21973 IRC. Fix for bug 9780; bugfix on 0.2.4.8-alpha.
21974 - Free directory authority certificate download statuses on exit
21975 rather than leaking them. Fixes bug 9644; bugfix on 0.2.4.13-alpha.
21977 o Minor bugfixes on 0.2.3.x (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
21978 - If the guard we choose first doesn't answer, we would try the
21979 second guard, but once we connected to the second guard we would
21980 abandon it and retry the first one, slowing down bootstrapping.
21981 The fix is to treat all our initially chosen guards as acceptable
21982 to use. Fixes bug 9946; bugfix on 0.1.1.11-alpha.
21983 - Fix an assertion failure that would occur when disabling the
21984 ORPort setting on a running Tor process while accounting was
21985 enabled. Fixes bug 6979; bugfix on 0.2.2.18-alpha.
21986 - When examining the list of network interfaces to find our address,
21987 do not consider non-running or disabled network interfaces. Fixes
21988 bug 9904; bugfix on 0.2.3.11-alpha. Patch from "hantwister".
21989 - Avoid an off-by-one error when checking buffer boundaries when
21990 formatting the exit status of a pluggable transport helper.
21991 This is probably not an exploitable bug, but better safe than
21992 sorry. Fixes bug 9928; bugfix on 0.2.3.18-rc. Bug found by
21995 o Removed code and features:
21996 - Clients now reject any directory authority certificates lacking
21997 a dir-key-crosscert element. These have been included since
21998 0.2.1.9-alpha, so there's no real reason for them to be optional
21999 any longer. Completes proposal 157. Resolves ticket 10162.
22000 - Remove all code that existed to support the v2 directory system,
22001 since there are no longer any v2 directory authorities. Resolves
22003 - Remove the HSAuthoritativeDir and AlternateHSAuthority torrc
22004 options, which were used for designating authorities as "Hidden
22005 service authorities". There has been no use of hidden service
22006 authorities since 0.2.2.1-alpha, when we stopped uploading or
22007 downloading v0 hidden service descriptors. Fixes bug 10881; also
22008 part of a fix for bug 10841.
22010 o Code simplification and refactoring:
22011 - Remove some old fallback code designed to keep Tor clients working
22012 in a network with only two working relays. Elsewhere in the code we
22013 have long since stopped supporting such networks, so there wasn't
22014 much point in keeping it around. Addresses ticket 9926.
22015 - Reject 0-length EXTEND2 cells more explicitly. Fixes bug 10536;
22016 bugfix on 0.2.4.8-alpha. Reported by "cypherpunks".
22017 - Remove data structures which were introduced to implement the
22018 CellStatistics option: they are now redundant with the addition
22019 of a timestamp to the regular packed_cell_t data structure, which
22020 we did in 0.2.4.18-rc in order to resolve ticket 9093. Implements
22023 o Documentation (man page) fixes:
22024 - Update manpage to describe some of the files you can expect to
22025 find in Tor's DataDirectory. Addresses ticket 9839.
22026 - Document that all but one DirPort entry must have the NoAdvertise
22027 flag set. Fixes bug 10470; bugfix on 0.2.3.3-alpha / 0.2.3.16-alpha.
22029 o Documentation fixes (new since 0.2.5.1-alpha, also in 0.2.4.18-rc):
22030 - Clarify the usage and risks of setting the ContactInfo torrc line
22031 for your relay or bridge. Resolves ticket 9854.
22032 - Add anchors to the manpage so we can link to the html version of
22033 the documentation for specific options. Resolves ticket 9866.
22034 - Replace remaining references to DirServer in man page and
22035 log entries. Resolves ticket 10124.
22038 - Make the "tor-gencert" tool used by directory authority operators
22039 create 2048-bit signing keys by default (rather than 1024-bit, since
22040 1024-bit is uncomfortably small these days). Addresses ticket 10324.
22043 Changes in version 0.2.4.20 - 2013-12-22
22044 Tor 0.2.4.20 fixes potentially poor random number generation for users
22045 who 1) use OpenSSL 1.0.0 or later, 2) set "HardwareAccel 1" in their
22046 torrc file, 3) have "Sandy Bridge" or "Ivy Bridge" Intel processors,
22047 and 4) have no state file in their DataDirectory (as would happen on
22048 first start). Users who generated relay or hidden service identity
22049 keys in such a situation should discard them and generate new ones.
22051 This release also fixes a logic error that caused Tor clients to build
22052 many more preemptive circuits than they actually need.
22055 - Do not allow OpenSSL engines to replace the PRNG, even when
22056 HardwareAccel is set. The only default builtin PRNG engine uses
22057 the Intel RDRAND instruction to replace the entire PRNG, and
22058 ignores all attempts to seed it with more entropy. That's
22059 cryptographically stupid: the right response to a new alleged
22060 entropy source is never to discard all previously used entropy
22061 sources. Fixes bug 10402; works around behavior introduced in
22062 OpenSSL 1.0.0. Diagnosis and investigation thanks to "coderman"
22064 - Fix assertion failure when AutomapHostsOnResolve yields an IPv6
22065 address. Fixes bug 10465; bugfix on 0.2.4.7-alpha.
22066 - Avoid launching spurious extra circuits when a stream is pending.
22067 This fixes a bug where any circuit that _wasn't_ unusable for new
22068 streams would be treated as if it were, causing extra circuits to
22069 be launched. Fixes bug 10456; bugfix on 0.2.4.12-alpha.
22072 - Avoid a crash bug when starting with a corrupted microdescriptor
22073 cache file. Fixes bug 10406; bugfix on 0.2.2.6-alpha.
22074 - If we fail to dump a previously cached microdescriptor to disk, avoid
22075 freeing duplicate data later on. Fixes bug 10423; bugfix on
22076 0.2.4.13-alpha. Spotted by "bobnomnom".
22079 Changes in version 0.2.4.19 - 2013-12-11
22080 The Tor 0.2.4 release series is dedicated to the memory of Aaron Swartz
22081 (1986-2013). Aaron worked on diverse projects including helping to guide
22082 Creative Commons, playing a key role in stopping SOPA/PIPA, bringing
22083 transparency to the U.S government's PACER documents, and contributing
22084 design and development for Tor and Tor2Web. Aaron was one of the latest
22085 martyrs in our collective fight for civil liberties and human rights,
22086 and his death is all the more painful because he was one of us.
22088 Tor 0.2.4.19, the first stable release in the 0.2.4 branch, features
22089 a new circuit handshake and link encryption that use ECC to provide
22090 better security and efficiency; makes relays better manage circuit
22091 creation requests; uses "directory guards" to reduce client enumeration
22092 risks; makes bridges collect and report statistics about the pluggable
22093 transports they support; cleans up and improves our geoip database;
22094 gets much closer to IPv6 support for clients, bridges, and relays; makes
22095 directory authorities use measured bandwidths rather than advertised
22096 ones when computing flags and thresholds; disables client-side DNS
22097 caching to reduce tracking risks; and fixes a big bug in bridge
22098 reachability testing. This release introduces two new design
22099 abstractions in the code: a new "channel" abstraction between circuits
22100 and or_connections to allow for implementing alternate relay-to-relay
22101 transports, and a new "circuitmux" abstraction storing the queue of
22102 circuits for a channel. The release also includes many stability,
22103 security, and privacy fixes.
22106 Changes in version 0.2.4.18-rc - 2013-11-16
22107 Tor 0.2.4.18-rc is the fourth release candidate for the Tor 0.2.4.x
22108 series. It takes a variety of fixes from the 0.2.5.x branch to improve
22109 stability, performance, and better handling of edge cases.
22112 - Re-enable TLS 1.1 and 1.2 when built with OpenSSL 1.0.1e or later.
22113 Resolves ticket 6055. (OpenSSL before 1.0.1 didn't have TLS 1.1 or
22114 1.2, and OpenSSL from 1.0.1 through 1.0.1d had bugs that prevented
22115 renegotiation from working with TLS 1.1 or 1.2, so we had disabled
22116 them to solve bug 6033.)
22119 - No longer stop reading or writing on cpuworker connections when
22120 our rate limiting buckets go empty. Now we should handle circuit
22121 handshake requests more promptly. Resolves bug 9731.
22122 - If we are unable to save a microdescriptor to the journal, do not
22123 drop it from memory and then reattempt downloading it. Fixes bug
22124 9645; bugfix on 0.2.2.6-alpha.
22125 - Stop trying to bootstrap all our directory information from
22126 only our first guard. Discovered while fixing bug 9946; bugfix
22128 - The new channel code sometimes lost track of in-progress circuits,
22129 causing long-running clients to stop building new circuits. The
22130 fix is to always call circuit_n_chan_done(chan, 0) from
22131 channel_closed(). Fixes bug 9776; bugfix on 0.2.4.17-rc.
22133 o Minor bugfixes (on 0.2.4.x):
22134 - Correctly log long IPv6 exit policies, instead of truncating them
22135 or reporting an error. Fixes bug 9596; bugfix on 0.2.4.7-alpha.
22136 - Our default TLS ecdhe groups were backwards: we meant to be using
22137 P224 for relays (for performance win) and P256 for bridges (since
22138 it is more common in the wild). Instead we had it backwards. After
22139 reconsideration, we decided that the default should be P256 on all
22140 hosts, since its security is probably better, and since P224 is
22141 reportedly used quite little in the wild. Found by "skruffy" on
22142 IRC. Fix for bug 9780; bugfix on 0.2.4.8-alpha.
22143 - Free directory authority certificate download statuses on exit
22144 rather than leaking them. Fixes bug 9644; bugfix on 0.2.4.13-alpha.
22146 o Minor bugfixes (on 0.2.3.x and earlier):
22147 - If the guard we choose first doesn't answer, we would try the
22148 second guard, but once we connected to the second guard we would
22149 abandon it and retry the first one, slowing down bootstrapping.
22150 The fix is to treat all our initially chosen guards as acceptable
22151 to use. Fixes bug 9946; bugfix on 0.1.1.11-alpha.
22152 - Fix an assertion failure that would occur when disabling the
22153 ORPort setting on a running Tor process while accounting was
22154 enabled. Fixes bug 6979; bugfix on 0.2.2.18-alpha.
22155 - When examining the list of network interfaces to find our address,
22156 do not consider non-running or disabled network interfaces. Fixes
22157 bug 9904; bugfix on 0.2.3.11-alpha. Patch from "hantwister".
22158 - Avoid an off-by-one error when checking buffer boundaries when
22159 formatting the exit status of a pluggable transport helper.
22160 This is probably not an exploitable bug, but better safe than
22161 sorry. Fixes bug 9928; bugfix on 0.2.3.18-rc. Bug found by
22164 o Minor features (protecting client timestamps):
22165 - Clients no longer send timestamps in their NETINFO cells. These were
22166 not used for anything, and they provided one small way for clients
22167 to be distinguished from each other as they moved from network to
22168 network or behind NAT. Implements part of proposal 222.
22169 - Clients now round timestamps in INTRODUCE cells down to the nearest
22170 10 minutes. If a new Support022HiddenServices option is set to 0, or
22171 if it's set to "auto" and the feature is disabled in the consensus,
22172 the timestamp is sent as 0 instead. Implements part of proposal 222.
22173 - Stop sending timestamps in AUTHENTICATE cells. This is not such
22174 a big deal from a security point of view, but it achieves no actual
22175 good purpose, and isn't needed. Implements part of proposal 222.
22176 - Reduce down accuracy of timestamps in hidden service descriptors.
22177 Implements part of proposal 222.
22179 o Minor features (other):
22180 - Improve the circuit queue out-of-memory handler. Previously, when
22181 we ran low on memory, we'd close whichever circuits had the most
22182 queued cells. Now, we close those that have the *oldest* queued
22183 cells, on the theory that those are most responsible for us
22184 running low on memory. Based on analysis from a forthcoming paper
22185 by Jansen, Tschorsch, Johnson, and Scheuermann. Fixes bug 9093.
22186 - Generate bootstrapping status update events correctly when fetching
22187 microdescriptors. Fixes bug 9927.
22188 - Update to the October 2 2013 Maxmind GeoLite Country database.
22190 o Documentation fixes:
22191 - Clarify the usage and risks of setting the ContactInfo torrc line
22192 for your relay or bridge. Resolves ticket 9854.
22193 - Add anchors to the manpage so we can link to the html version of
22194 the documentation for specific options. Resolves ticket 9866.
22195 - Replace remaining references to DirServer in man page and
22196 log entries. Resolves ticket 10124.
22199 Changes in version 0.2.5.1-alpha - 2013-10-02
22200 Tor 0.2.5.1-alpha introduces experimental support for syscall sandboxing
22201 on Linux, allows bridges that offer pluggable transports to report usage
22202 statistics, fixes many issues to make testing easier, and provides
22203 a pile of minor features and bugfixes that have been waiting for a
22204 release of the new branch.
22206 This is the first alpha release in a new series, so expect there to
22207 be bugs. Users who would rather test out a more stable branch should
22208 stay with 0.2.4.x for now.
22210 o Major features (security):
22211 - Use the seccomp2 syscall filtering facility on Linux to limit
22212 which system calls Tor can invoke. This is an experimental,
22213 Linux-only feature to provide defense-in-depth against unknown
22214 attacks. To try turning it on, set "Sandbox 1" in your torrc
22215 file. Please be ready to report bugs. We hope to add support
22216 for better sandboxing in the future, including more fine-grained
22217 filters, better division of responsibility, and support for more
22218 platforms. This work has been done by Cristian-Matei Toader for
22219 Google Summer of Code.
22220 - Re-enable TLS 1.1 and 1.2 when built with OpenSSL 1.0.1e or later.
22221 Resolves ticket 6055. (OpenSSL before 1.0.1 didn't have TLS 1.1 or
22222 1.2, and OpenSSL from 1.0.1 through 1.0.1d had bugs that prevented
22223 renegotiation from working with TLS 1.1 or 1.2, so we had disabled
22224 them to solve bug 6033.)
22226 o Major features (other):
22227 - Add support for passing arguments to managed pluggable transport
22228 proxies. Implements ticket 3594.
22229 - Bridges now track GeoIP information and the number of their users
22230 even when pluggable transports are in use, and report usage
22231 statistics in their extra-info descriptors. Resolves tickets 4773
22233 - Make testing Tor networks bootstrap better: lower directory fetch
22234 retry schedules and maximum interval without directory requests,
22235 and raise maximum download tries. Implements ticket 6752.
22236 - Add make target 'test-network' to run tests on a Chutney network.
22237 Implements ticket 8530.
22238 - The ntor handshake is now on-by-default, no matter what the
22239 directory authorities recommend. Implements ticket 8561.
22242 - Instead of writing destroy cells directly to outgoing connection
22243 buffers, queue them and intersperse them with other outgoing cells.
22244 This can prevent a set of resource starvation conditions where too
22245 many pending destroy cells prevent data cells from actually getting
22246 delivered. Reported by "oftc_must_be_destroyed". Fixes bug 7912;
22247 bugfix on 0.2.0.1-alpha.
22248 - If we are unable to save a microdescriptor to the journal, do not
22249 drop it from memory and then reattempt downloading it. Fixes bug
22250 9645; bugfix on 0.2.2.6-alpha.
22251 - The new channel code sometimes lost track of in-progress circuits,
22252 causing long-running clients to stop building new circuits. The
22253 fix is to always call circuit_n_chan_done(chan, 0) from
22254 channel_closed(). Fixes bug 9776; bugfix on 0.2.4.17-rc.
22257 - Tor now builds each source file in two modes: a mode that avoids
22258 exposing identifiers needlessly, and another mode that exposes
22259 more identifiers for testing. This lets the compiler do better at
22260 optimizing the production code, while enabling us to take more
22261 radical measures to let the unit tests test things.
22262 - The production builds no longer include functions used only in
22263 the unit tests; all functions exposed from a module only for
22264 unit-testing are now static in production builds.
22265 - Add an --enable-coverage configuration option to make the unit
22266 tests (and a new src/or/tor-cov target) to build with gcov test
22270 - We now have rudimentary function mocking support that our unit
22271 tests can use to test functions in isolation. Function mocking
22272 lets the tests temporarily replace a function's dependencies with
22273 stub functions, so that the tests can check the function without
22274 invoking the other functions it calls.
22275 - Add more unit tests for the <circid,channel>->circuit map, and
22276 the destroy-cell-tracking code to fix bug 7912.
22277 - Unit tests for failing cases of the TAP onion handshake.
22278 - More unit tests for address-manipulation functions.
22280 o Minor features (protecting client timestamps):
22281 - Clients no longer send timestamps in their NETINFO cells. These were
22282 not used for anything, and they provided one small way for clients
22283 to be distinguished from each other as they moved from network to
22284 network or behind NAT. Implements part of proposal 222.
22285 - Clients now round timestamps in INTRODUCE cells down to the nearest
22286 10 minutes. If a new Support022HiddenServices option is set to 0, or
22287 if it's set to "auto" and the feature is disabled in the consensus,
22288 the timestamp is sent as 0 instead. Implements part of proposal 222.
22289 - Stop sending timestamps in AUTHENTICATE cells. This is not such
22290 a big deal from a security point of view, but it achieves no actual
22291 good purpose, and isn't needed. Implements part of proposal 222.
22292 - Reduce down accuracy of timestamps in hidden service descriptors.
22293 Implements part of proposal 222.
22295 o Minor features (config options):
22296 - Config (torrc) lines now handle fingerprints which are missing
22297 their initial '$'. Resolves ticket 4341; improvement over 0.0.9pre5.
22298 - Support a --dump-config option to print some or all of the
22299 configured options. Mainly useful for debugging the command-line
22300 option parsing code. Helps resolve ticket 4647.
22301 - Raise awareness of safer logging: notify user of potentially
22302 unsafe config options, like logging more verbosely than severity
22303 "notice" or setting SafeLogging to 0. Resolves ticket 5584.
22304 - Add a new configuration option TestingV3AuthVotingStartOffset
22305 that bootstraps a network faster by changing the timing for
22306 consensus votes. Addresses ticket 8532.
22307 - Add a new torrc option "ServerTransportOptions" that allows
22308 bridge operators to pass configuration parameters to their
22309 pluggable transports. Resolves ticket 8929.
22310 - The config (torrc) file now accepts bandwidth and space limits in
22311 bits as well as bytes. (Anywhere that you can say "2 Kilobytes",
22312 you can now say "16 kilobits", and so on.) Resolves ticket 9214.
22315 o Minor features (build):
22316 - Add support for `--library-versions` flag. Implements ticket 6384.
22317 - Return the "unexpected sendme" warnings to a warn severity, but make
22318 them rate limited, to help diagnose ticket 8093.
22319 - Detect a missing asciidoc, and warn the user about it, during
22320 configure rather than at build time. Fixes issue 6506. Patch from
22323 o Minor features (other):
22324 - Use the SOCK_NONBLOCK socket type, if supported, to open nonblocking
22325 sockets in a single system call. Implements ticket 5129.
22326 - Log current accounting state (bytes sent and received + remaining
22327 time for the current accounting period) in the relay's heartbeat
22328 message. Implements ticket 5526; patch from Peter Retzlaff.
22329 - Implement the TRANSPORT_LAUNCHED control port event that
22330 notifies controllers about new launched pluggable
22331 transports. Resolves ticket 5609.
22332 - If we're using the pure-C 32-bit curve25519_donna implementation
22333 of curve25519, build it with the -fomit-frame-pointer option to
22334 make it go faster on register-starved hosts. This improves our
22335 handshake performance by about 6% on i386 hosts without nacl.
22336 Closes ticket 8109.
22337 - Update to the September 4 2013 Maxmind GeoLite Country database.
22340 - Set the listen() backlog limit to the largest actually supported
22341 on the system, not to the value in a header file. Fixes bug 9716;
22342 bugfix on every released Tor.
22343 - No longer accept malformed http headers when parsing urls from
22344 headers. Now we reply with Bad Request ("400"). Fixes bug 2767;
22345 bugfix on 0.0.6pre1.
22346 - In munge_extrainfo_into_routerinfo(), check the return value of
22347 memchr(). This would have been a serious issue if we ever passed
22348 it a non-extrainfo. Fixes bug 8791; bugfix on 0.2.0.6-alpha. Patch
22350 - On the chance that somebody manages to build Tor on a
22351 platform where time_t is unsigned, correct the way that
22352 microdesc_add_to_cache() handles negative time arguments.
22353 Fixes bug 8042; bugfix on 0.2.3.1-alpha.
22354 - Reject relative control socket paths and emit a warning. Previously,
22355 single-component control socket paths would be rejected, but Tor
22356 would not log why it could not validate the config. Fixes bug 9258;
22357 bugfix on 0.2.3.16-alpha.
22359 o Minor bugfixes (command line):
22360 - Use a single command-line parser for parsing torrc options on the
22361 command line and for finding special command-line options to avoid
22362 inconsistent behavior for torrc option arguments that have the same
22363 names as command-line options. Fixes bugs 4647 and 9578; bugfix on
22365 - No longer allow 'tor --hash-password' with no arguments. Fixes bug
22366 9573; bugfix on 0.0.9pre5.
22368 o Minor fixes (build, auxiliary programs):
22369 - Stop preprocessing the "torify" script with autoconf, since
22370 it no longer refers to LOCALSTATEDIR. Fixes bug 5505; patch
22372 - The tor-fw-helper program now follows the standard convention and
22373 exits with status code "0" on success. Fixes bug 9030; bugfix on
22374 0.2.3.1-alpha. Patch by Arlo Breault.
22375 - Corrected ./configure advice for what openssl dev package you should
22376 install on Debian. Fixes bug 9207; bugfix on 0.2.0.1-alpha.
22378 o Minor code improvements:
22379 - Remove constants and tests for PKCS1 padding; it's insecure and
22380 shouldn't be used for anything new. Fixes bug 8792; patch
22382 - Remove instances of strcpy() from the unit tests. They weren't
22383 hurting anything, since they were only in the unit tests, but it's
22384 embarrassing to have strcpy() in the code at all, and some analysis
22385 tools don't like it. Fixes bug 8790; bugfix on 0.2.3.6-alpha and
22386 0.2.3.8-alpha. Patch from Arlo Breault.
22388 o Removed features:
22389 - Remove migration code from when we renamed the "cached-routers"
22390 file to "cached-descriptors" back in 0.2.0.8-alpha. This
22391 incidentally resolves ticket 6502 by cleaning up the related code
22392 a bit. Patch from Akshay Hebbar.
22394 o Code simplification and refactoring:
22395 - Extract the common duplicated code for creating a subdirectory
22396 of the data directory and writing to a file in it. Fixes ticket
22397 4282; patch from Peter Retzlaff.
22398 - Since OpenSSL 0.9.7, the i2d_*() functions support allocating output
22399 buffer. Avoid calling twice: i2d_RSAPublicKey(), i2d_DHparams(),
22400 i2d_X509(), and i2d_PublicKey(). Resolves ticket 5170.
22401 - Add a set of accessor functions for the circuit timeout data
22402 structure. Fixes ticket 6153; patch from "piet".
22403 - Clean up exit paths from connection_listener_new(). Closes ticket
22404 8789. Patch from Arlo Breault.
22405 - Since we rely on OpenSSL 0.9.8 now, we can use EVP_PKEY_cmp()
22406 and drop our own custom pkey_eq() implementation. Fixes bug 9043.
22407 - Use a doubly-linked list to implement the global circuit list.
22408 Resolves ticket 9108. Patch from Marek Majkowski.
22409 - Remove contrib/id_to_fp.c since it wasn't used anywhere.
22412 Changes in version 0.2.4.17-rc - 2013-09-05
22413 Tor 0.2.4.17-rc is the third release candidate for the Tor 0.2.4.x
22414 series. It adds an emergency step to help us tolerate the massive
22415 influx of users: 0.2.4 clients using the new (faster and safer) "NTor"
22416 circuit-level handshakes now effectively jump the queue compared to
22417 the 0.2.3 clients using "TAP" handshakes. This release also fixes a
22418 big bug hindering bridge reachability tests.
22421 - Relays now process the new "NTor" circuit-level handshake requests
22422 with higher priority than the old "TAP" circuit-level handshake
22423 requests. We still process some TAP requests to not totally starve
22424 0.2.3 clients when NTor becomes popular. A new consensus parameter
22425 "NumNTorsPerTAP" lets us tune the balance later if we need to.
22426 Implements ticket 9574.
22429 - If the circuit build timeout logic is disabled (via the consensus,
22430 or because we are an authority), then don't build testing circuits.
22431 Fixes bug 9657; bugfix on 0.2.2.14-alpha.
22432 - Bridges now send AUTH_CHALLENGE cells during their v3 handshakes;
22433 previously they did not, which prevented them from receiving
22434 successful connections from relays for self-test or bandwidth
22435 testing. Also, when a relay is extending a circuit to a bridge,
22436 it needs to send a NETINFO cell, even when the bridge hasn't sent
22437 an AUTH_CHALLENGE cell. Fixes bug 9546; bugfix on 0.2.3.6-alpha.
22438 - If the time to download the next old-style networkstatus is in
22439 the future, do not decline to consider whether to download the
22440 next microdescriptor networkstatus. Fixes bug 9564; bugfix on
22444 - Avoid double-closing the listener socket in our socketpair()
22445 replacement (used on Windows) in the case where the addresses on
22446 our opened sockets don't match what we expected. Fixes bug 9400;
22447 bugfix on 0.0.2pre7. Found by Coverity.
22449 o Minor fixes (config options):
22450 - Avoid overflows when the user sets MaxCircuitDirtiness to a
22451 ridiculously high value, by imposing a (ridiculously high) 30-day
22452 maximum on MaxCircuitDirtiness.
22453 - Fix the documentation of HeartbeatPeriod to say that the heartbeat
22454 message is logged at notice, not at info.
22455 - Warn and fail if a server is configured not to advertise any
22456 ORPorts at all. (We need *something* to put in our descriptor,
22457 or we just won't work.)
22460 - Track how many "TAP" and "NTor" circuit handshake requests we get,
22461 and how many we complete, and log it every hour to help relay
22462 operators follow trends in network load. Addresses ticket 9658.
22463 - Update to the August 7 2013 Maxmind GeoLite Country database.
22466 Changes in version 0.2.4.16-rc - 2013-08-10
22467 Tor 0.2.4.16-rc is the second release candidate for the Tor 0.2.4.x
22468 series. It fixes several crash bugs in the 0.2.4 branch.
22471 - Fix a bug in the voting algorithm that could yield incorrect results
22472 when a non-naming authority declared too many flags. Fixes bug 9200;
22473 bugfix on 0.2.0.3-alpha.
22474 - Fix an uninitialized read that could in some cases lead to a remote
22475 crash while parsing INTRODUCE2 cells. Bugfix on 0.2.4.1-alpha.
22476 Anybody running a hidden service on the experimental 0.2.4.x
22477 branch should upgrade. (This is, so far as we know, unrelated to
22479 - Avoid an assertion failure when processing DNS replies without the
22480 answer types we expected. Fixes bug 9337; bugfix on 0.2.4.7-alpha.
22481 - Avoid a crash when using --hash-password. Fixes bug 9295; bugfix on
22482 0.2.4.15-rc. Found by stem integration tests.
22485 - Fix an invalid memory read that occurred when a pluggable
22486 transport proxy failed its configuration protocol.
22487 Fixes bug 9288; bugfix on 0.2.4.1-alpha.
22488 - When evaluating whether to use a connection that we haven't
22489 decided is canonical using a recent link protocol version,
22490 decide that it's canonical only if it used address _does_
22491 match the desired address. Fixes bug 9309; bugfix on
22492 0.2.4.4-alpha. Reported by skruffy.
22493 - Make the default behavior of NumDirectoryGuards be to track
22494 NumEntryGuards. Now a user who changes only NumEntryGuards will get
22495 the behavior she expects. Fixes bug 9354; bugfix on 0.2.4.8-alpha.
22496 - Fix a spurious compilation warning with some older versions of
22497 GCC on FreeBSD. Fixes bug 9254; bugfix on 0.2.4.14-alpha.
22500 - Update to the July 3 2013 Maxmind GeoLite Country database.
22503 Changes in version 0.2.4.15-rc - 2013-07-01
22504 Tor 0.2.4.15-rc is the first release candidate for the Tor 0.2.4.x
22505 series. It fixes a few smaller bugs, but generally appears stable.
22506 Please test it and let us know whether it is!
22509 - When receiving a new configuration file via the control port's
22510 LOADCONF command, do not treat the defaults file as absent.
22511 Fixes bug 9122; bugfix on 0.2.3.9-alpha.
22514 - Issue a warning when running with the bufferevents backend enabled.
22515 It's still not stable, and people should know that they're likely
22516 to hit unexpected problems. Closes ticket 9147.
22519 Changes in version 0.2.4.14-alpha - 2013-06-18
22520 Tor 0.2.4.14-alpha fixes a pair of client guard enumeration problems
22521 present in 0.2.4.13-alpha.
22524 - When we have too much memory queued in circuits (according to a new
22525 MaxMemInCellQueues option), close the circuits consuming the most
22526 memory. This prevents us from running out of memory as a relay if
22527 circuits fill up faster than they can be drained. Fixes bug 9063;
22528 bugfix on the 54th commit of Tor. This bug is a further fix beyond
22529 bug 6252, whose fix was merged into 0.2.3.21-rc.
22531 This change also fixes an earlier approach taken in 0.2.4.13-alpha,
22532 where we tried to solve this issue simply by imposing an upper limit
22533 on the number of queued cells for a single circuit. That approach
22534 proved to be problematic, since there are ways to provoke clients to
22535 send a number of cells in excess of any such reasonable limit. Fixes
22536 bug 9072; bugfix on 0.2.4.13-alpha.
22538 - Limit hidden service descriptors to at most ten introduction
22539 points, to slow one kind of guard enumeration. Fixes bug 9002;
22540 bugfix on 0.1.1.11-alpha.
22543 Changes in version 0.2.4.13-alpha - 2013-06-14
22544 Tor 0.2.4.13-alpha fixes a variety of potential remote crash
22545 vulnerabilities, makes socks5 username/password circuit isolation
22546 actually actually work (this time for sure!), and cleans up a bunch
22547 of other issues in preparation for a release candidate.
22549 o Major bugfixes (robustness):
22550 - Close any circuit that has too many cells queued on it. Fixes
22551 bug 9063; bugfix on the 54th commit of Tor. This bug is a further
22552 fix beyond bug 6252, whose fix was merged into 0.2.3.21-rc.
22553 - Prevent the get_freelists() function from running off the end of
22554 the list of freelists if it somehow gets an unrecognized
22555 allocation. Fixes bug 8844; bugfix on 0.2.0.16-alpha. Reported by
22557 - Avoid an assertion failure on OpenBSD (and perhaps other BSDs)
22558 when an exit connection with optimistic data succeeds immediately
22559 rather than returning EINPROGRESS. Fixes bug 9017; bugfix on
22561 - Fix a directory authority crash bug when building a consensus
22562 using an older consensus as its basis. Fixes bug 8833. Bugfix
22566 - Avoid a memory leak where we would leak a consensus body when we
22567 find that a consensus which we couldn't previously verify due to
22568 missing certificates is now verifiable. Fixes bug 8719; bugfix
22570 - We used to always request authority certificates by identity digest,
22571 meaning we'd get the newest one even when we wanted one with a
22572 different signing key. Then we would complain about being given
22573 a certificate we already had, and never get the one we really
22574 wanted. Now we use the "fp-sk/" resource as well as the "fp/"
22575 resource to request the one we want. Fixes bug 5595; bugfix on
22577 - Follow the socks5 protocol when offering username/password
22578 authentication. The fix for bug 8117 exposed this bug, and it
22579 turns out real-world applications like Pidgin do care. Bugfix on
22580 0.2.3.2-alpha; fixes bug 8879.
22581 - Prevent failures on Windows Vista and later when rebuilding the
22582 microdescriptor cache. Diagnosed by Robert Ransom. Fixes bug 8822;
22583 bugfix on 0.2.4.12-alpha.
22586 - Fix an impossible buffer overrun in the AES unit tests. Fixes
22587 bug 8845; bugfix on 0.2.0.7-alpha. Found by eugenis.
22588 - If for some reason we fail to write a microdescriptor while
22589 rebuilding the cache, do not let the annotations from that
22590 microdescriptor linger in the cache file, and do not let the
22591 microdescriptor stay recorded as present in its old location.
22592 Fixes bug 9047; bugfix on 0.2.2.6-alpha.
22593 - Fix a memory leak that would occur whenever a configuration
22594 option changed. Fixes bug 8718; bugfix on 0.2.3.3-alpha.
22595 - Paste the description for PathBias parameters from the man
22596 page into or.h, so the code documents them too. Fixes bug 7982;
22597 bugfix on 0.2.3.17-beta and 0.2.4.8-alpha.
22598 - Relays now treat a changed IPv6 ORPort as sufficient reason to
22599 publish an updated descriptor. Fixes bug 6026; bugfix on
22601 - When launching a resolve request on behalf of an AF_UNIX control
22602 socket, omit the address field of the new entry connection, used in
22603 subsequent controller events, rather than letting tor_dup_addr()
22604 set it to "<unknown address type>". Fixes bug 8639; bugfix on
22607 o Minor bugfixes (log messages):
22608 - Fix a scaling issue in the path bias accounting code that
22609 resulted in "Bug:" log messages from either
22610 pathbias_scale_close_rates() or pathbias_count_build_success().
22611 This represents a bugfix on a previous bugfix: the original fix
22612 attempted in 0.2.4.10-alpha was incomplete. Fixes bug 8235; bugfix
22614 - Give a less useless error message when the user asks for an IPv4
22615 address on an IPv6-only port, or vice versa. Fixes bug 8846; bugfix
22619 - Downgrade "unexpected SENDME" warnings to protocol-warn for 0.2.4.x,
22620 to tolerate bug 8093 for now.
22621 - Add an "ignoring-advertised-bws" boolean to the flag-threshold lines
22622 in directory authority votes to describe whether they have enough
22623 measured bandwidths to ignore advertised (relay descriptor)
22624 bandwidth claims. Resolves ticket 8711.
22625 - Update to the June 5 2013 Maxmind GeoLite Country database.
22627 o Removed documentation:
22628 - Remove some of the older contents of doc/ as obsolete; move others
22629 to torspec.git. Fixes bug 8965.
22631 o Code simplification and refactoring:
22632 - Avoid using character buffers when constructing most directory
22633 objects: this approach was unwieldy and error-prone. Instead,
22634 build smartlists of strings, and concatenate them when done.
22637 Changes in version 0.2.4.12-alpha - 2013-04-18
22638 Tor 0.2.4.12-alpha moves Tor forward on several fronts: it starts the
22639 process for lengthening the guard rotation period, makes directory
22640 authority opinions in the consensus a bit less gameable, makes socks5
22641 username/password circuit isolation actually work, and fixes a wide
22642 variety of other issues.
22645 - Raise the default time that a client keeps an entry guard from
22646 "1-2 months" to "2-3 months", as suggested by Tariq Elahi's WPES
22647 2012 paper. (We would make it even longer, but we need better client
22648 load balancing first.) Also, make the guard lifetime controllable
22649 via a new GuardLifetime torrc option and a GuardLifetime consensus
22650 parameter. Start of a fix for bug 8240; bugfix on 0.1.1.11-alpha.
22651 - Directory authorities now prefer using measured bandwidths to
22652 advertised ones when computing flags and thresholds. Resolves
22654 - Directory authorities that have more than a threshold number
22655 of relays with measured bandwidths now treat relays with unmeasured
22656 bandwidths as having bandwidth 0. Resolves ticket 8435.
22658 o Major bugfixes (assert / resource use):
22659 - Avoid a bug where our response to TLS renegotiation under certain
22660 network conditions could lead to a busy-loop, with 100% CPU
22661 consumption. Fixes bug 5650; bugfix on 0.2.0.16-alpha.
22662 - Avoid an assertion when we discover that we'd like to write a cell
22663 onto a closing connection: just discard the cell. Fixes another
22664 case of bug 7350; bugfix on 0.2.4.4-alpha.
22666 o Major bugfixes (client-side privacy):
22667 - When we mark a circuit as unusable for new circuits, have it
22668 continue to be unusable for new circuits even if MaxCircuitDirtiness
22669 is increased too much at the wrong time, or the system clock jumps
22670 backwards. Fixes bug 6174; bugfix on 0.0.2pre26.
22671 - If ClientDNSRejectInternalAddresses ("do not believe DNS queries
22672 which have resolved to internal addresses") is set, apply that
22673 rule to IPv6 as well. Fixes bug 8475; bugfix on 0.2.0.7-alpha.
22674 - When an exit relay rejects a stream with reason "exit policy", but
22675 we only know an exit policy summary (e.g. from the microdesc
22676 consensus) for it, do not mark the relay as useless for all exiting.
22677 Instead, mark just the circuit as unsuitable for that particular
22678 address. Fixes part of bug 7582; bugfix on 0.2.3.2-alpha.
22679 - Allow applications to get proper stream isolation with
22680 IsolateSOCKSAuth. Many SOCKS5 clients that want to offer
22681 username/password authentication also offer "no authentication". Tor
22682 had previously preferred "no authentication", so the applications
22683 never actually sent Tor their auth details. Now Tor selects
22684 username/password authentication if it's offered. You can disable
22685 this behavior on a per-SOCKSPort basis via PreferSOCKSNoAuth. Fixes
22686 bug 8117; bugfix on 0.2.3.3-alpha.
22688 o Major bugfixes (other):
22689 - When unable to find any working directory nodes to use as a
22690 directory guard, give up rather than adding the same non-working
22691 nodes to the directory guard list over and over. Fixes bug 8231;
22692 bugfix on 0.2.4.8-alpha.
22695 - Reject as invalid most directory objects containing a NUL.
22696 Belt-and-suspender fix for bug 8037.
22697 - In our testsuite, create temporary directories with a bit more
22698 entropy in their name to make name collisions less likely. Fixes
22700 - Add CACHED keyword to ADDRMAP events in the control protocol
22701 to indicate whether a DNS result will be cached or not. Resolves
22703 - Update to the April 3 2013 Maxmind GeoLite Country database.
22705 o Minor features (build):
22706 - Detect and reject attempts to build Tor with threading support
22707 when OpenSSL has been compiled without threading support.
22709 - Clarify that when autoconf is checking for nacl, it is checking
22710 specifically for nacl with a fast curve25519 implementation.
22712 - Warn if building on a platform with an unsigned time_t: there
22713 are too many places where Tor currently assumes that time_t can
22714 hold negative values. We'd like to fix them all, but probably
22717 o Minor bugfixes (build):
22718 - Fix some bugs in tor-fw-helper-natpmp when trying to build and
22719 run it on Windows. More bugs likely remain. Patch from Gisle Vanem.
22720 Fixes bug 7280; bugfix on 0.2.3.1-alpha.
22721 - Add the old src/or/micro-revision.i filename to CLEANFILES.
22722 On the off chance that somebody has one, it will go away as soon
22723 as they run "make clean". Fix for bug 7143; bugfix on 0.2.4.1-alpha.
22724 - Build Tor correctly on 32-bit platforms where the compiler can build
22725 but not run code using the "uint128_t" construction. Fixes bug 8587;
22726 bugfix on 0.2.4.8-alpha.
22727 - Fix compilation warning with some versions of clang that would
22728 prefer the -Wswitch-enum compiler flag to warn about switch
22729 statements with missing enum values, even if those switch
22730 statements have a "default:" statement. Fixes bug 8598; bugfix
22733 o Minor bugfixes (protocol):
22734 - Fix the handling of a TRUNCATE cell when it arrives while the
22735 circuit extension is in progress. Fixes bug 7947; bugfix on 0.0.7.1.
22736 - Fix a misframing issue when reading the version numbers in a
22737 VERSIONS cell. Previously we would recognize [00 01 00 02] as
22738 'version 1, version 2, and version 0x100', when it should have
22739 only included versions 1 and 2. Fixes bug 8059; bugfix on
22740 0.2.0.10-alpha. Reported pseudonymously.
22741 - Make the format and order of STREAM events for DNS lookups
22742 consistent among the various ways to launch DNS lookups. Fixes
22743 bug 8203; bugfix on 0.2.0.24-rc. Patch by "Desoxy".
22744 - Correct our check for which versions of Tor support the EXTEND2
22745 cell. We had been willing to send it to Tor 0.2.4.7-alpha and
22746 later, when support was really added in version 0.2.4.8-alpha.
22747 Fixes bug 8464; bugfix on 0.2.4.8-alpha.
22749 o Minor bugfixes (other):
22750 - Correctly store microdescriptors and extrainfo descriptors with
22751 an internal NUL byte. Fixes bug 8037; bugfix on 0.2.0.1-alpha.
22752 Bug reported by "cypherpunks".
22753 - Increase the width of the field used to remember a connection's
22754 link protocol version to two bytes. Harmless for now, since the
22755 only currently recognized versions are one byte long. Reported
22756 pseudonymously. Fixes bug 8062; bugfix on 0.2.0.10-alpha.
22757 - If the state file's path bias counts are invalid (presumably from a
22758 buggy Tor prior to 0.2.4.10-alpha), make them correct. Also add
22759 additional checks and log messages to the scaling of Path Bias
22760 counts, in case there still are remaining issues with scaling.
22761 Should help resolve bug 8235.
22762 - Eliminate several instances where we use "Nickname=ID" to refer to
22763 nodes in logs. Use "Nickname (ID)" instead. (Elsewhere, we still use
22764 "$ID=Nickname", which is also acceptable.) Fixes bug 7065. Bugfix
22765 on 0.2.3.21-rc, 0.2.4.5-alpha, 0.2.4.8-alpha, and 0.2.4.10-alpha.
22767 o Minor bugfixes (syscalls):
22768 - Always check the return values of functions fcntl() and
22769 setsockopt(). We don't believe these are ever actually failing in
22770 practice, but better safe than sorry. Also, checking these return
22771 values should please analysis tools like Coverity. Patch from
22772 'flupzor'. Fixes bug 8206; bugfix on all versions of Tor.
22773 - Use direct writes rather than stdio when building microdescriptor
22774 caches, in an attempt to mitigate bug 8031, or at least make it
22777 o Minor bugfixes (config):
22778 - When rejecting a configuration because we were unable to parse a
22779 quoted string, log an actual error message. Fixes bug 7950; bugfix
22781 - Behave correctly when the user disables LearnCircuitBuildTimeout
22782 but doesn't tell us what they would like the timeout to be. Fixes
22783 bug 6304; bugfix on 0.2.2.14-alpha.
22784 - When autodetecting the number of CPUs, use the number of available
22785 CPUs in preference to the number of configured CPUs. Inform the
22786 user if this reduces the number of available CPUs. Fixes bug 8002;
22787 bugfix on 0.2.3.1-alpha.
22788 - Make it an error when you set EntryNodes but disable UseGuardNodes,
22789 since it will (surprisingly to some users) ignore EntryNodes. Fixes
22790 bug 8180; bugfix on 0.2.3.11-alpha.
22791 - Allow TestingTorNetworks to override the 4096-byte minimum for
22792 the Fast threshold. Otherwise they can't bootstrap until they've
22793 observed more traffic. Fixes bug 8508; bugfix on 0.2.4.10-alpha.
22794 - Fix some logic errors when the user manually overrides the
22795 PathsNeededToBuildCircuits option in torrc. Fixes bug 8599; bugfix
22798 o Minor bugfixes (log messages to help diagnose bugs):
22799 - If we fail to free a microdescriptor because of bug 7164, log
22800 the filename and line number from which we tried to free it.
22801 - Add another diagnostic to the heartbeat message: track and log
22802 overhead that TLS is adding to the data we write. If this is
22803 high, we are sending too little data to SSL_write at a time.
22804 Diagnostic for bug 7707.
22805 - Add more detail to a log message about relaxed timeouts, to help
22807 - Warn more aggressively when flushing microdescriptors to a
22808 microdescriptor cache fails, in an attempt to mitigate bug 8031,
22809 or at least make it more diagnosable.
22810 - Improve debugging output to help track down bug 8185 ("Bug:
22811 outgoing relay cell has n_chan==NULL. Dropping.")
22812 - Log the purpose of a path-bias testing circuit correctly.
22813 Improves a log message from bug 8477; bugfix on 0.2.4.8-alpha.
22815 o Minor bugfixes (0.2.4.x log messages that were too noisy):
22816 - Don't attempt to relax the timeout of already opened 1-hop circuits.
22817 They might never timeout. This should eliminate some/all cases of
22818 the relaxed timeout log message.
22819 - Use circuit creation time for network liveness evaluation. This
22820 should eliminate warning log messages about liveness caused
22821 by changes in timeout evaluation. Fixes bug 6572; bugfix on
22823 - Reduce a path bias length check from notice to info. The message
22824 is triggered when creating controller circuits. Fixes bug 8196;
22825 bugfix on 0.2.4.8-alpha.
22826 - Fix a path state issue that triggered a notice during relay startup.
22827 Fixes bug 8320; bugfix on 0.2.4.10-alpha.
22828 - Reduce occurrences of warns about circuit purpose in
22829 connection_ap_expire_building(). Fixes bug 8477; bugfix on
22832 o Minor bugfixes (pre-0.2.4.x log messages that were too noisy):
22833 - If we encounter a write failure on a SOCKS connection before we
22834 finish our SOCKS handshake, don't warn that we closed the
22835 connection before we could send a SOCKS reply. Fixes bug 8427;
22836 bugfix on 0.1.0.1-rc.
22837 - Correctly recognize that [::1] is a loopback address. Fixes
22838 bug 8377; bugfix on 0.2.1.3-alpha.
22839 - Fix a directory authority warn caused when we have a large amount
22840 of badexit bandwidth. Fixes bug 8419; bugfix on 0.2.2.10-alpha.
22841 - Don't log inappropriate heartbeat messages when hibernating: a
22842 hibernating node is _expected_ to drop out of the consensus,
22843 decide it isn't bootstrapped, and so forth. Fixes bug 7302;
22844 bugfix on 0.2.3.1-alpha.
22845 - Don't complain about bootstrapping problems while hibernating.
22846 These complaints reflect a general code problem, but not one
22847 with any problematic effects (no connections are actually
22848 opened). Fixes part of bug 7302; bugfix on 0.2.3.2-alpha.
22850 o Documentation fixes:
22851 - Update tor-fw-helper.1.txt and tor-fw-helper.c to make option
22852 names match. Fixes bug 7768.
22853 - Make the torify manpage no longer refer to tsocks; torify hasn't
22854 supported tsocks since 0.2.3.14-alpha.
22855 - Make the tor manpage no longer reference tsocks.
22856 - Fix the GeoIPExcludeUnknown documentation to refer to
22857 ExcludeExitNodes rather than the currently nonexistent
22858 ExcludeEntryNodes. Spotted by "hamahangi" on tor-talk.
22861 - The tor-tsocks.conf is no longer distributed or installed. We
22862 recommend that tsocks users use torsocks instead. Resolves
22866 Changes in version 0.2.4.11-alpha - 2013-03-11
22867 Tor 0.2.4.11-alpha makes relay measurement by directory authorities
22868 more robust, makes hidden service authentication work again, and
22869 resolves a DPI fingerprint for Tor's SSL transport.
22871 o Major features (directory authorities):
22872 - Directory authorities now support a new consensus method (17)
22873 where they cap the published bandwidth of servers for which
22874 insufficient bandwidth measurements exist. Fixes part of bug 2286.
22875 - Directory authorities that set "DisableV2DirectoryInfo_ 1" no longer
22876 serve any v2 directory information. Now we can test disabling the
22877 old deprecated v2 directory format, and see whether doing so has
22878 any effect on network load. Begins to fix bug 6783.
22879 - Directory authorities now include inside each vote a statement of
22880 the performance thresholds they used when assigning flags.
22881 Implements ticket 8151.
22883 o Major bugfixes (directory authorities):
22884 - Stop marking every relay as having been down for one hour every
22885 time we restart a directory authority. These artificial downtimes
22886 were messing with our Stable and Guard flag calculations. Fixes
22887 bug 8218 (introduced by the fix for 1035). Bugfix on 0.2.2.23-alpha.
22889 o Major bugfixes (hidden services):
22890 - Allow hidden service authentication to succeed again. When we
22891 refactored the hidden service introduction code back
22892 in 0.2.4.1-alpha, we didn't update the code that checks
22893 whether authentication information is present, causing all
22894 authentication checks to return "false". Fix for bug 8207; bugfix
22895 on 0.2.4.1-alpha. Found by Coverity; this is CID 718615.
22897 o Minor features (relays, bridges):
22898 - Make bridge relays check once a minute for whether their IP
22899 address has changed, rather than only every 15 minutes. Resolves
22900 bugs 1913 and 1992.
22901 - Refactor resolve_my_address() so it returns the method by which we
22902 decided our public IP address (explicitly configured, resolved from
22903 explicit hostname, guessed from interfaces, learned by gethostname).
22904 Now we can provide more helpful log messages when a relay guesses
22905 its IP address incorrectly (e.g. due to unexpected lines in
22906 /etc/hosts). Resolves ticket 2267.
22907 - Teach bridge-using clients to avoid 0.2.2 bridges when making
22908 microdescriptor-related dir requests, and only fall back to normal
22909 descriptors if none of their bridges can handle microdescriptors
22910 (as opposed to the fix in ticket 4013, which caused them to fall
22911 back to normal descriptors if *any* of their bridges preferred
22912 them). Resolves ticket 4994.
22913 - Randomize the lifetime of our SSL link certificate, so censors can't
22914 use the static value for filtering Tor flows. Resolves ticket 8443;
22915 related to ticket 4014 which was included in 0.2.2.33.
22916 - Support a new version of the link protocol that allows 4-byte circuit
22917 IDs. Previously, circuit IDs were limited to 2 bytes, which presented
22918 a possible resource exhaustion issue. Closes ticket 7351; implements
22921 o Minor features (portability):
22922 - Tweak the curve25519-donna*.c implementations to tolerate systems
22923 that lack stdint.h. Fixes bug 3894; bugfix on 0.2.4.8-alpha.
22924 - Use Ville Laurikari's implementation of AX_CHECK_SIGN() to determine
22925 the signs of types during autoconf. This is better than our old
22926 approach, which didn't work when cross-compiling.
22927 - Detect the sign of enum values, rather than assuming that MSC is the
22928 only compiler where enum types are all signed. Fixes bug 7727;
22929 bugfix on 0.2.4.10-alpha.
22931 o Minor features (other):
22932 - Say "KBytes" rather than "KB" in the man page (for various values
22933 of K), to further reduce confusion about whether Tor counts in
22934 units of memory or fractions of units of memory. Resolves ticket 7054.
22935 - Clear the high bit on curve25519 public keys before passing them to
22936 our backend, in case we ever wind up using a backend that doesn't do
22937 so itself. If we used such a backend, and *didn't* clear the high bit,
22938 we could wind up in a situation where users with such backends would
22939 be distinguishable from users without. Fixes bug 8121; bugfix on
22941 - Update to the March 6 2013 Maxmind GeoLite Country database.
22943 o Minor bugfixes (clients):
22944 - When we receive a RELAY_END cell with the reason DONE, or with no
22945 reason, before receiving a RELAY_CONNECTED cell, report the SOCKS
22946 status as "connection refused". Previously we reported these cases
22947 as success but then immediately closed the connection. Fixes bug
22948 7902; bugfix on 0.1.0.1-rc. Reported by "oftc_must_be_destroyed".
22949 - Downgrade an assertion in connection_ap_expire_beginning to an
22950 LD_BUG message. The fix for bug 8024 should prevent this message
22951 from displaying, but just in case, a warn that we can diagnose
22952 is better than more assert crashes. Fixes bug 8065; bugfix on
22954 - Lower path use bias thresholds to .80 for notice and .60 for warn.
22955 Also make the rate limiting flags for the path use bias log messages
22956 independent from the original path bias flags. Fixes bug 8161;
22957 bugfix on 0.2.4.10-alpha.
22959 o Minor bugfixes (relays):
22960 - Stop trying to resolve our hostname so often (e.g. every time we
22961 think about doing a directory fetch). Now we reuse the cached
22962 answer in some cases. Fixes bugs 1992 (bugfix on 0.2.0.20-rc)
22963 and 2410 (bugfix on 0.1.2.2-alpha).
22964 - Stop sending a stray "(null)" in some cases for the server status
22965 "EXTERNAL_ADDRESS" controller event. Resolves bug 8200; bugfix
22967 - When choosing which stream on a formerly stalled circuit to wake
22968 first, make better use of the platform's weak RNG. Previously,
22969 we had been using the % ("modulo") operator to try to generate a
22970 1/N chance of picking each stream, but this behaves badly with
22971 many platforms' choice of weak RNG. Fixes bug 7801; bugfix on
22973 - Use our own weak RNG when we need a weak RNG. Windows's rand() and
22974 Irix's random() only return 15 bits; Solaris's random() returns more
22975 bits but its RAND_MAX says it only returns 15, and so on. Motivated
22976 by the fix for bug 7801; bugfix on 0.2.2.20-alpha.
22978 o Minor bugfixes (directory authorities):
22979 - Directory authorities now use less space when formatting identical
22980 microdescriptor lines in directory votes. Fixes bug 8158; bugfix
22983 o Minor bugfixes (memory leaks spotted by Coverity -- bug 7816):
22984 - Avoid leaking memory if we fail to compute a consensus signature
22985 or we generate a consensus we can't parse. Bugfix on 0.2.0.5-alpha.
22986 - Fix a memory leak when receiving headers from an HTTPS proxy. Bugfix
22988 - Fix a memory leak during safe-cookie controller authentication.
22989 Bugfix on 0.2.3.13-alpha.
22990 - Avoid memory leak of IPv6 policy content if we fail to format it into
22991 a router descriptor. Bugfix on 0.2.4.7-alpha.
22993 o Minor bugfixes (other code correctness issues):
22994 - Avoid a crash if we fail to generate an extrainfo descriptor.
22995 Fixes bug 8208; bugfix on 0.2.3.16-alpha. Found by Coverity;
22996 this is CID 718634.
22997 - When detecting the largest possible file descriptor (in order to
22998 close all file descriptors when launching a new program), actually
22999 use _SC_OPEN_MAX. The old code for doing this was very, very broken.
23000 Fixes bug 8209; bugfix on 0.2.3.1-alpha. Found by Coverity; this
23002 - Fix a copy-and-paste error when adding a missing A1 to a routerset
23003 because of GeoIPExcludeUnknown. Fix for Coverity CID 980650.
23004 Bugfix on 0.2.4.10-alpha.
23005 - Fix an impossible-to-trigger integer overflow when estimating how
23006 long our onionskin queue would take. (This overflow would require us
23007 to accept 4 million onionskins before processing 100 of them.) Fixes
23008 bug 8210; bugfix on 0.2.4.10-alpha.
23010 o Code simplification and refactoring:
23011 - Add a wrapper function for the common "log a message with a
23015 Changes in version 0.2.4.10-alpha - 2013-02-04
23016 Tor 0.2.4.10-alpha adds defenses at the directory authority level from
23017 certain attacks that flood the network with relays; changes the queue
23018 for circuit create requests from a sized-based limit to a time-based
23019 limit; resumes building with MSVC on Windows; and fixes a wide variety
23022 o Major bugfixes (directory authority):
23023 - When computing directory thresholds, ignore any rejected-as-sybil
23024 nodes during the computation so that they can't influence Fast,
23025 Guard, etc. (We should have done this for proposal 109.) Fixes
23027 - When marking a node as a likely sybil, reset its uptime metrics
23028 to zero, so that it cannot time towards getting marked as Guard,
23029 Stable, or HSDir. (We should have done this for proposal 109.) Fixes
23033 - When a TLS write is partially successful but incomplete, remember
23034 that the flushed part has been flushed, and notice that bytes were
23035 actually written. Reported and fixed pseudonymously. Fixes bug
23036 7708; bugfix on Tor 0.1.0.5-rc.
23037 - Reject bogus create and relay cells with 0 circuit ID or 0 stream
23038 ID: these could be used to create unexpected streams and circuits
23039 which would count as "present" to some parts of Tor but "absent"
23040 to others, leading to zombie circuits and streams or to a bandwidth
23041 denial-of-service. Fixes bug 7889; bugfix on every released version
23042 of Tor. Reported by "oftc_must_be_destroyed".
23043 - Rename all macros in our local copy of queue.h to begin with "TOR_".
23044 This change seems the only good way to permanently prevent conflicts
23045 with queue.h on various operating systems. Fixes bug 8107; bugfix
23048 o Major features (relay):
23049 - Instead of limiting the number of queued onionskins (aka circuit
23050 create requests) to a fixed, hard-to-configure number, we limit
23051 the size of the queue based on how many we expect to be able to
23052 process in a given amount of time. We estimate the time it will
23053 take to process an onionskin based on average processing time
23054 of previous onionskins. Closes ticket 7291. You'll never have to
23055 configure MaxOnionsPending again.
23057 o Major features (portability):
23058 - Resume building correctly with MSVC and Makefile.nmake. This patch
23059 resolves numerous bugs and fixes reported by ultramage, including
23060 7305, 7308, 7309, 7310, 7312, 7313, 7315, 7316, and 7669.
23061 - Make the ntor and curve25519 code build correctly with MSVC.
23062 Fix on 0.2.4.8-alpha.
23065 - When directory authorities are computing thresholds for flags,
23066 never let the threshold for the Fast flag fall below 4096
23067 bytes. Also, do not consider nodes with extremely low bandwidths
23068 when deciding thresholds for various directory flags. This change
23069 should raise our threshold for Fast relays, possibly in turn
23070 improving overall network performance; see ticket 1854. Resolves
23072 - The Tor client now ignores sub-domain components of a .onion
23073 address. This change makes HTTP "virtual" hosting
23074 possible: http://foo.aaaaaaaaaaaaaaaa.onion/ and
23075 http://bar.aaaaaaaaaaaaaaaa.onion/ can be two different websites
23076 hosted on the same hidden service. Implements proposal 204.
23077 - We compute the overhead from passing onionskins back and forth to
23078 cpuworkers, and report it when dumping statistics in response to
23079 SIGUSR1. Supports ticket 7291.
23081 o Minor features (path selection):
23082 - When deciding whether we have enough descriptors to build circuits,
23083 instead of looking at raw relay counts, look at which fraction
23084 of (bandwidth-weighted) paths we're able to build. This approach
23085 keeps clients from building circuits if their paths are likely to
23086 stand out statistically. The default fraction of paths needed is
23087 taken from the consensus directory; you can override it with the
23088 new PathsNeededToBuildCircuits option. Fixes ticket 5956.
23089 - When any country code is listed in ExcludeNodes or ExcludeExitNodes,
23090 and we have GeoIP information, also exclude all nodes with unknown
23091 countries "??" and "A1". This behavior is controlled by the
23092 new GeoIPExcludeUnknown option: you can make such nodes always
23093 excluded with "GeoIPExcludeUnknown 1", and disable the feature
23094 with "GeoIPExcludeUnknown 0". Setting "GeoIPExcludeUnknown auto"
23095 gets you the default behavior. Implements feature 7706.
23096 - Path Use Bias: Perform separate accounting for successful circuit
23097 use. Keep separate statistics on stream attempt rates versus stream
23098 success rates for each guard. Provide configurable thresholds to
23099 determine when to emit log messages or disable use of guards that
23100 fail too many stream attempts. Resolves ticket 7802.
23102 o Minor features (log messages):
23103 - When learning a fingerprint for a bridge, log its corresponding
23104 transport type. Implements ticket 7896.
23105 - Improve the log message when "Bug/attack: unexpected sendme cell
23106 from client" occurs, to help us track bug 8093.
23109 - Remove a couple of extraneous semicolons that were upsetting the
23110 cparser library. Patch by Christian Grothoff. Fixes bug 7115;
23111 bugfix on 0.2.2.1-alpha.
23112 - Remove a source of rounding error during path bias count scaling;
23113 don't count cannibalized circuits as used for path bias until we
23114 actually try to use them; and fix a circuit_package_relay_cell()
23115 warning message about n_chan==NULL. Fixes bug 7802.
23116 - Detect nacl when its headers are in a nacl/ subdirectory. Also,
23117 actually link against nacl when we're configured to use it. Fixes
23118 bug 7972; bugfix on 0.2.4.8-alpha.
23119 - Compile correctly with the --disable-curve25519 option. Fixes
23120 bug 8153; bugfix on 0.2.4.8-alpha.
23122 o Build improvements:
23123 - Do not report status verbosely from autogen.sh unless the -v flag
23124 is specified. Fixes issue 4664. Patch from Onizuka.
23125 - Replace all calls to snprintf() outside of src/ext with
23126 tor_snprintf(). Also remove the #define to replace snprintf with
23127 _snprintf on Windows; they have different semantics, and all of
23128 our callers should be using tor_snprintf() anyway. Fixes bug 7304.
23129 - Try to detect if we are ever building on a platform where
23130 memset(...,0,...) does not set the value of a double to 0.0. Such
23131 platforms are permitted by the C standard, though in practice
23132 they're pretty rare (since IEEE 754 is nigh-ubiquitous). We don't
23133 currently support them, but it's better to detect them and fail
23134 than to perform erroneously.
23136 o Removed features:
23137 - Stop exporting estimates of v2 and v3 directory traffic shares
23138 in extrainfo documents. They were unneeded and sometimes inaccurate.
23139 Also stop exporting any v2 directory request statistics. Resolves
23141 - Drop support for detecting and warning about versions of Libevent
23142 before 1.3e. Nothing reasonable ships with them any longer;
23143 warning the user about them shouldn't be needed. Resolves ticket
23146 o Code simplifications and refactoring:
23147 - Rename "isin" functions to "contains", for grammar. Resolves
23149 - Rename Tor's logging function log() to tor_log(), to avoid conflicts
23150 with the natural logarithm function from the system libm. Resolves
23154 Changes in version 0.2.4.9-alpha - 2013-01-15
23155 Tor 0.2.4.9-alpha provides a quick fix to make the new ntor handshake
23156 work more robustly.
23159 - Fix backward compatibility logic when receiving an embedded ntor
23160 handshake tunneled in a CREATE cell. This clears up the "Bug:
23161 couldn't format CREATED cell" warning. Fixes bug 7959; bugfix
23165 Changes in version 0.2.4.8-alpha - 2013-01-14
23166 Tor 0.2.4.8-alpha introduces directory guards to reduce user enumeration
23167 risks, adds a new stronger and faster circuit handshake, and offers
23168 stronger and faster link encryption when both sides support it.
23171 - Preliminary support for directory guards (proposal 207): when
23172 possible, clients now use their entry guards for non-anonymous
23173 directory requests. This can help prevent client enumeration. Note
23174 that this behavior only works when we have a usable consensus
23175 directory, and when options about what to download are more or less
23176 standard. In the future we should re-bootstrap from our guards,
23177 rather than re-bootstrapping from the preconfigured list of
23178 directory sources that ships with Tor. Resolves ticket 6526.
23179 - Tor relays and clients now support a better CREATE/EXTEND cell
23180 format, allowing the sender to specify multiple address, identity,
23181 and handshake types. Implements Robert Ransom's proposal 200;
23182 closes ticket 7199.
23184 o Major features (new circuit handshake):
23185 - Tor now supports a new circuit extension handshake designed by Ian
23186 Goldberg, Douglas Stebila, and Berkant Ustaoglu. Our original
23187 circuit extension handshake, later called "TAP", was a bit slow
23188 (especially on the relay side), had a fragile security proof, and
23189 used weaker keys than we'd now prefer. The new circuit handshake
23190 uses Dan Bernstein's "curve25519" elliptic-curve Diffie-Hellman
23191 function, making it significantly more secure than the older
23192 handshake, and significantly faster. Tor can use one of two built-in
23193 pure-C curve25519-donna implementations by Adam Langley, or it
23194 can link against the "nacl" library for a tuned version if present.
23196 The built-in version is very fast for 64-bit systems when building
23197 with GCC. The built-in 32-bit version is still faster than the
23198 old TAP protocol, but using libnacl is better on most such hosts.
23200 Clients don't currently use this protocol by default, since
23201 comparatively few clients support it so far. To try it, set
23202 UseNTorHandshake to 1.
23204 Implements proposal 216; closes ticket 7202.
23206 o Major features (better link encryption):
23207 - Relays can now enable the ECDHE TLS ciphersuites when available
23208 and appropriate. These ciphersuites let us negotiate forward-secure
23209 TLS secret keys more safely and more efficiently than with our
23210 previous use of Diffie-Hellman modulo a 1024-bit prime. By default,
23211 public relays prefer the (faster) P224 group, and bridges prefer
23212 the (more common) P256 group; you can override this with the
23215 Enabling these ciphers was a little tricky, since for a long time,
23216 clients had been claiming to support them without actually doing
23217 so, in order to foil fingerprinting. But with the client-side
23218 implementation of proposal 198 in 0.2.3.17-beta, clients can now
23219 match the ciphers from recent Firefox versions *and* list the
23220 ciphers they actually mean, so relays can believe such clients
23221 when they advertise ECDHE support in their TLS ClientHello messages.
23223 This feature requires clients running 0.2.3.17-beta or later,
23224 and requires both sides to be running OpenSSL 1.0.0 or later
23225 with ECC support. OpenSSL 1.0.1, with the compile-time option
23226 "enable-ec_nistp_64_gcc_128", is highly recommended.
23228 Implements the relay side of proposal 198; closes ticket 7200.
23231 - Avoid crashing when, as a relay without IPv6-exit support, a
23232 client insists on getting an IPv6 address or nothing. Fixes bug
23233 7814; bugfix on 0.2.4.7-alpha.
23236 - Improve circuit build timeout handling for hidden services.
23237 In particular: adjust build timeouts more accurately depending
23238 upon the number of hop-RTTs that a particular circuit type
23239 undergoes. Additionally, launch intro circuits in parallel
23240 if they timeout, and take the first one to reply as valid.
23241 - Work correctly on Unix systems where EAGAIN and EWOULDBLOCK are
23242 separate error codes; or at least, don't break for that reason.
23243 Fixes bug 7935. Reported by "oftc_must_be_destroyed".
23244 - Update to the January 2 2013 Maxmind GeoLite Country database.
23246 o Minor features (testing):
23247 - Add benchmarks for DH (1024-bit multiplicative group) and ECDH
23248 (P-256) Diffie-Hellman handshakes to src/or/bench.
23249 - Add benchmark functions to test onion handshake performance.
23251 o Minor features (path bias detection):
23252 - Alter the Path Bias log messages to be more descriptive in terms
23253 of reporting timeouts and other statistics.
23254 - Create three levels of Path Bias log messages, as opposed to just
23255 two. These are configurable via consensus as well as via the torrc
23256 options PathBiasNoticeRate, PathBiasWarnRate, PathBiasExtremeRate.
23257 The default values are 0.70, 0.50, and 0.30 respectively.
23258 - Separate the log message levels from the decision to drop guards,
23259 which also is available via torrc option PathBiasDropGuards.
23260 PathBiasDropGuards still defaults to 0 (off).
23261 - Deprecate PathBiasDisableRate in favor of PathBiasDropGuards
23262 in combination with PathBiasExtremeRate.
23263 - Increase the default values for PathBiasScaleThreshold and
23264 PathBiasCircThreshold from (200, 20) to (300, 150).
23265 - Add in circuit usage accounting to path bias. If we try to use a
23266 built circuit but fail for any reason, it counts as path bias.
23267 Certain classes of circuits where the adversary gets to pick your
23268 destination node are exempt from this accounting. Usage accounting
23269 can be specifically disabled via consensus parameter or torrc.
23270 - Convert all internal path bias state to double-precision floating
23271 point, to avoid roundoff error and other issues.
23272 - Only record path bias information for circuits that have completed
23273 *two* hops. Assuming end-to-end tagging is the attack vector, this
23274 makes us more resilient to ambient circuit failure without any
23275 detection capability loss.
23277 o Minor bugfixes (log messages):
23278 - Rate-limit the "No circuits are opened. Relaxed timeout for a
23279 circuit with channel state open..." message to once per hour to
23280 keep it from filling the notice logs. Mitigates bug 7799 but does
23281 not fix the underlying cause. Bugfix on 0.2.4.7-alpha.
23282 - Avoid spurious warnings when configuring multiple client ports of
23283 which only some are nonlocal. Previously, we had claimed that some
23284 were nonlocal when in fact they weren't. Fixes bug 7836; bugfix on
23287 o Code simplifications and refactoring:
23288 - Get rid of a couple of harmless clang warnings, where we compared
23289 enums to ints. These warnings are newly introduced in clang 3.2.
23290 - Split the onion.c file into separate modules for the onion queue
23291 and the different handshakes it supports.
23292 - Remove the marshalling/unmarshalling code for sending requests to
23293 cpuworkers over a socket, and instead just send structs. The
23294 recipient will always be the same Tor binary as the sender, so
23295 any encoding is overkill.
23298 Changes in version 0.2.4.7-alpha - 2012-12-24
23299 Tor 0.2.4.7-alpha introduces a new approach to providing fallback
23300 directory mirrors for more robust bootstrapping; fixes more issues where
23301 clients with changing network conditions refuse to make any circuits;
23302 adds initial support for exiting to IPv6 addresses; resumes being able
23303 to update our GeoIP database, and includes the geoip6 file this time;
23304 turns off the client-side DNS cache by default due to privacy risks;
23305 and fixes a variety of other issues.
23307 o Major features (client resilience):
23308 - Add a new "FallbackDir" torrc option to use when we can't use
23309 a directory mirror from the consensus (either because we lack a
23310 consensus, or because they're all down). Currently, all authorities
23311 are fallbacks by default, and there are no other default fallbacks,
23312 but that will change. This option will allow us to give clients a
23313 longer list of servers to try to get a consensus from when first
23314 connecting to the Tor network, and thereby reduce load on the
23315 directory authorities. Implements proposal 206, "Preconfigured
23316 directory sources for bootstrapping". We also removed the old
23317 "FallbackNetworkstatus" option, since we never got it working well
23318 enough to use it. Closes bug 572.
23319 - If we have no circuits open, use a relaxed timeout (the
23320 95-percentile cutoff) until a circuit succeeds. This heuristic
23321 should allow Tor to succeed at building circuits even when the
23322 network connection drastically changes. Should help with bug 3443.
23324 o Major features (IPv6):
23325 - Relays can now exit to IPv6 addresses: make sure that you have IPv6
23326 connectivity, then set the IPv6Exit flag to 1. Also make sure your
23327 exit policy reads as you would like: the address * applies to all
23328 address families, whereas *4 is IPv4 address only, and *6 is IPv6
23329 addresses only. On the client side, you'll need to wait until the
23330 authorities have upgraded, wait for enough exits to support IPv6,
23331 apply the "IPv6Traffic" flag to a SocksPort, and use Socks5. Closes
23332 ticket 5547, implements proposal 117 as revised in proposal 208.
23334 We DO NOT recommend that clients with actual anonymity needs start
23335 using IPv6 over Tor yet, since not enough exits support it yet.
23337 o Major features (geoip database):
23338 - Maxmind began labelling Tor relays as being in country "A1",
23339 which breaks by-country node selection inside Tor. Now we use a
23340 script to replace "A1" ("Anonymous Proxy") entries in our geoip
23341 file with real country codes. This script fixes about 90% of "A1"
23342 entries automatically and uses manual country code assignments to
23343 fix the remaining 10%. See src/config/README.geoip for details.
23344 Fixes bug 6266. Also update to the December 5 2012 Maxmind GeoLite
23345 Country database, as modified above.
23347 o Major bugfixes (client-side DNS):
23348 - Turn off the client-side DNS cache by default. Updating and using
23349 the DNS cache is now configurable on a per-client-port
23350 level. SOCKSPort, DNSPort, etc lines may now contain
23351 {No,}Cache{IPv4,IPv6,}DNS lines to indicate that we shouldn't
23352 cache these types of DNS answers when we receive them from an
23353 exit node in response to an application request on this port, and
23354 {No,}UseCached{IPv4,IPv6,DNS} lines to indicate that if we have
23355 cached DNS answers of these types, we shouldn't use them. It's
23356 potentially risky to use cached DNS answers at the client, since
23357 doing so can indicate to one exit what answers we've gotten
23358 for DNS lookups in the past. With IPv6, this becomes especially
23359 problematic. Using cached DNS answers for requests on the same
23360 circuit would present less linkability risk, since all traffic
23361 on a circuit is already linkable, but it would also provide
23362 little performance benefit: the exit node caches DNS replies
23363 too. Implements a simplified version of Proposal 205. Implements
23366 o Major bugfixes (other):
23367 - Alter circuit build timeout measurement to start at the point
23368 where we begin the CREATE/CREATE_FAST step (as opposed to circuit
23369 initialization). This should make our timeout measurements more
23370 uniform. Previously, we were sometimes including ORconn setup time
23371 in our circuit build time measurements. Should resolve bug 3443.
23372 - Fix an assertion that could trigger in hibernate_go_dormant() when
23373 closing an or_connection_t: call channel_mark_for_close() rather
23374 than connection_mark_for_close(). Fixes bug 7267. Bugfix on
23376 - Include the geoip6 IPv6 GeoIP database in the tarball. Fixes bug
23377 7655; bugfix on 0.2.4.6-alpha.
23380 - Add a new torrc option "ServerTransportListenAddr" to let bridge
23381 operators select the address where their pluggable transports will
23382 listen for connections. Resolves ticket 7013.
23383 - Allow an optional $ before the node identity digest in the
23384 controller command GETINFO ns/id/<identity>, for consistency with
23385 md/id/<identity> and desc/id/<identity>. Resolves ticket 7059.
23386 - Log packaged cell fullness as part of the heartbeat message.
23387 Diagnosis to try to determine the extent of bug 7743.
23389 o Minor features (IPv6):
23390 - AutomapHostsOnResolve now supports IPv6 addresses. By default, we
23391 prefer to hand out virtual IPv6 addresses, since there are more of
23392 them and we can't run out. To override this behavior and make IPv4
23393 addresses preferred, set NoPreferIPv6Automap on whatever SOCKSPort
23394 or DNSPort you're using for resolving. Implements ticket 7571.
23395 - AutomapHostsOnResolve responses are now randomized, to avoid
23396 annoying situations where Tor is restarted and applications
23397 connect to the wrong addresses.
23398 - Never try more than 1000 times to pick a new virtual address when
23399 AutomapHostsOnResolve is set. That's good enough so long as we
23400 aren't close to handing out our entire virtual address space;
23401 if you're getting there, it's best to switch to IPv6 virtual
23405 - The ADDRMAP command can no longer generate an ill-formed error
23406 code on a failed MAPADDRESS. It now says "internal" rather than
23407 an English sentence fragment with spaces in the middle. Bugfix on
23408 Tor 0.2.0.19-alpha.
23409 - Fix log messages and comments to avoid saying "GMT" when we mean
23410 "UTC". Fixes bug 6113.
23411 - Compile on win64 using mingw64. Fixes bug 7260; patches from
23413 - Fix a crash when debugging unit tests on Windows: deallocate a
23414 shared library with FreeLibrary, not CloseHandle. Fixes bug 7306;
23415 bugfix on 0.2.2.17-alpha. Reported by "ultramage".
23418 - The DirServer option is now DirAuthority, for consistency with
23419 current naming patterns. You can still use the old DirServer form.
23421 o Code simplification and refactoring:
23422 - Move the client-side address-map/virtual-address/DNS-cache code
23423 out of connection_edge.c into a new addressmap.c module.
23424 - Remove unused code for parsing v1 directories and "running routers"
23425 documents. Fixes bug 6887.
23428 Changes in version 0.2.3.25 - 2012-11-19
23429 The Tor 0.2.3 release series is dedicated to the memory of Len "rabbi"
23430 Sassaman (1980-2011), a long-time cypherpunk, anonymity researcher,
23431 Mixmaster maintainer, Pynchon Gate co-designer, CodeCon organizer,
23432 programmer, and friend. Unstinting in his dedication to the cause of
23433 freedom, he inspired and helped many of us as we began our work on
23434 anonymity, and inspires us still. Please honor his memory by writing
23435 software to protect people's freedoms, and by helping others to do so.
23437 Tor 0.2.3.25, the first stable release in the 0.2.3 branch, features
23438 significantly reduced directory overhead (via microdescriptors),
23439 enormous crypto performance improvements for fast relays on new
23440 enough hardware, a new v3 TLS handshake protocol that can better
23441 resist fingerprinting, support for protocol obfuscation plugins (aka
23442 pluggable transports), better scalability for hidden services, IPv6
23443 support for bridges, performance improvements like allowing clients
23444 to skip the first round-trip on the circuit ("optimistic data") and
23445 refilling token buckets more often, a new "stream isolation" design
23446 to isolate different applications on different circuits, and many
23447 stability, security, and privacy fixes.
23450 - Tor tries to wipe potentially sensitive data after using it, so
23451 that if some subsequent security failure exposes Tor's memory,
23452 the damage will be limited. But we had a bug where the compiler
23453 was eliminating these wipe operations when it decided that the
23454 memory was no longer visible to a (correctly running) program,
23455 hence defeating our attempt at defense in depth. We fix that
23456 by using OpenSSL's OPENSSL_cleanse() operation, which a compiler
23457 is unlikely to optimize away. Future versions of Tor may use
23458 a less ridiculously heavy approach for this. Fixes bug 7352.
23459 Reported in an article by Andrey Karpov.
23462 - Fix a harmless bug when opting against publishing a relay descriptor
23463 because DisableNetwork is set. Fixes bug 7464; bugfix on
23467 Changes in version 0.2.4.6-alpha - 2012-11-13
23468 Tor 0.2.4.6-alpha fixes an assert bug that has been plaguing relays,
23469 makes our defense-in-depth memory wiping more reliable, and begins to
23470 count IPv6 addresses in bridge statistics,
23473 - Fix an assertion failure that could occur when closing a connection
23474 with a spliced rendezvous circuit. Fix for bug 7212; bugfix on
23476 - Tor tries to wipe potentially sensitive data after using it, so
23477 that if some subsequent security failure exposes Tor's memory,
23478 the damage will be limited. But we had a bug where the compiler
23479 was eliminating these wipe operations when it decided that the
23480 memory was no longer visible to a (correctly running) program,
23481 hence defeating our attempt at defense in depth. We fix that
23482 by using OpenSSL's OPENSSL_cleanse() operation, which a compiler
23483 is unlikely to optimize away. Future versions of Tor may use
23484 a less ridiculously heavy approach for this. Fixes bug 7352.
23485 Reported in an article by Andrey Karpov.
23488 - Add GeoIP database for IPv6 addresses. The new config option
23490 - Bridge statistics now count bridge clients connecting over IPv6:
23491 bridge statistics files now list "bridge-ip-versions" and
23492 extra-info documents list "geoip6-db-digest". The control protocol
23493 "CLIENTS_SEEN" and "ip-to-country" queries now support IPv6. Initial
23494 implementation by "shkoo", addressing ticket 5055.
23497 - Warn when we are binding low ports when hibernation is enabled;
23498 previously we had warned when we were _advertising_ low ports with
23499 hibernation enabled. Fixes bug 7285; bugfix on 0.2.3.9-alpha.
23500 - Fix a harmless bug when opting against publishing a relay descriptor
23501 because DisableNetwork is set. Fixes bug 7464; bugfix on
23503 - Add warning message when a managed proxy dies during configuration.
23504 Fixes bug 7195; bugfix on 0.2.4.2-alpha.
23505 - Fix a linking error when building tor-fw-helper without miniupnp.
23506 Fixes bug 7235; bugfix on 0.2.4.2-alpha. Fix by Anthony G. Basile.
23507 - Check for closing an or_connection_t without going through correct
23508 channel functions; emit a warning and then call
23509 connection_or_close_for_error() so we don't assert as in bugs 7212
23511 - Compile correctly on compilers without C99 designated initializer
23512 support. Fixes bug 7286; bugfix on 0.2.4.4-alpha.
23513 - Avoid a possible assert that can occur when channel_send_destroy() is
23514 called on a channel in CHANNEL_STATE_CLOSING, CHANNEL_STATE_CLOSED,
23515 or CHANNEL_STATE_ERROR when the Tor process is resumed after being
23516 blocked for a long interval. Fixes bug 7350; bugfix on 0.2.4.4-alpha.
23517 - Fix a memory leak on failing cases of channel_tls_process_certs_cell.
23518 Fixes bug 7422; bugfix on 0.2.4.4-alpha.
23520 o Code simplification and refactoring:
23521 - Start using OpenBSD's implementation of queue.h, so that we don't
23522 need to hand-roll our own pointer and list structures whenever we
23523 need them. (We can't rely on a sys/queue.h, since some operating
23524 systems don't have them, and the ones that do have them don't all
23525 present the same extensions.)
23528 Changes in version 0.2.4.5-alpha - 2012-10-25
23529 Tor 0.2.4.5-alpha comes hard at the heels of 0.2.4.4-alpha, to fix
23530 two important security vulnerabilities that could lead to remotely
23531 triggerable relay crashes, fix a major bug that was preventing clients
23532 from choosing suitable exit nodes, and refactor some of our code.
23534 o Major bugfixes (security, also in 0.2.3.24-rc):
23535 - Fix a group of remotely triggerable assertion failures related to
23536 incorrect link protocol negotiation. Found, diagnosed, and fixed
23537 by "some guy from France". Fix for CVE-2012-2250; bugfix on
23539 - Fix a denial of service attack by which any directory authority
23540 could crash all the others, or by which a single v2 directory
23541 authority could crash everybody downloading v2 directory
23542 information. Fixes bug 7191; bugfix on 0.2.0.10-alpha.
23544 o Major bugfixes (also in 0.2.3.24-rc):
23545 - When parsing exit policy summaries from microdescriptors, we had
23546 previously been ignoring the last character in each one, so that
23547 "accept 80,443,8080" would be treated by clients as indicating
23548 a node that allows access to ports 80, 443, and 808. That would
23549 lead to clients attempting connections that could never work,
23550 and ignoring exit nodes that would support their connections. Now
23551 clients parse these exit policy summaries correctly. Fixes bug 7192;
23552 bugfix on 0.2.3.1-alpha.
23554 o Minor bugfixes (also in 0.2.3.24-rc):
23555 - Clients now consider the ClientRejectInternalAddresses config option
23556 when using a microdescriptor consensus stanza to decide whether
23557 an exit relay would allow exiting to an internal address. Fixes
23558 bug 7190; bugfix on 0.2.3.1-alpha.
23561 - Only disable TLS session ticket support when running as a TLS
23562 server. Now clients will blend better with regular Firefox
23563 connections. Fixes bug 7189; bugfix on Tor 0.2.3.23-rc.
23565 o Code simplification and refactoring:
23566 - Start using OpenBSD's implementation of queue.h (originally by
23568 - Move the entry node code from circuitbuild.c to its own file.
23569 - Move the circuit build timeout tracking code from circuitbuild.c
23573 Changes in version 0.2.3.24-rc - 2012-10-25
23574 Tor 0.2.3.24-rc fixes two important security vulnerabilities that
23575 could lead to remotely triggerable relay crashes, and fixes
23576 a major bug that was preventing clients from choosing suitable exit
23579 o Major bugfixes (security):
23580 - Fix a group of remotely triggerable assertion failures related to
23581 incorrect link protocol negotiation. Found, diagnosed, and fixed
23582 by "some guy from France". Fix for CVE-2012-2250; bugfix on
23584 - Fix a denial of service attack by which any directory authority
23585 could crash all the others, or by which a single v2 directory
23586 authority could crash everybody downloading v2 directory
23587 information. Fixes bug 7191; bugfix on 0.2.0.10-alpha.
23590 - When parsing exit policy summaries from microdescriptors, we had
23591 previously been ignoring the last character in each one, so that
23592 "accept 80,443,8080" would be treated by clients as indicating
23593 a node that allows access to ports 80, 443, and 808. That would
23594 lead to clients attempting connections that could never work,
23595 and ignoring exit nodes that would support their connections. Now
23596 clients parse these exit policy summaries correctly. Fixes bug 7192;
23597 bugfix on 0.2.3.1-alpha.
23600 - Clients now consider the ClientRejectInternalAddresses config option
23601 when using a microdescriptor consensus stanza to decide whether
23602 an exit relay would allow exiting to an internal address. Fixes
23603 bug 7190; bugfix on 0.2.3.1-alpha.
23606 Changes in version 0.2.4.4-alpha - 2012-10-20
23607 Tor 0.2.4.4-alpha adds a new v3 directory authority, fixes a privacy
23608 vulnerability introduced by a change in OpenSSL, fixes a remotely
23609 triggerable assert, and adds new channel_t and circuitmux_t abstractions
23610 that will make it easier to test new connection transport and cell
23611 scheduling algorithms.
23613 o New directory authorities (also in 0.2.3.23-rc):
23614 - Add Faravahar (run by Sina Rabbani) as the ninth v3 directory
23615 authority. Closes ticket 5749.
23617 o Major bugfixes (security/privacy, also in 0.2.3.23-rc):
23618 - Disable TLS session tickets. OpenSSL's implementation was giving
23619 our TLS session keys the lifetime of our TLS context objects, when
23620 perfect forward secrecy would want us to discard anything that
23621 could decrypt a link connection as soon as the link connection
23622 was closed. Fixes bug 7139; bugfix on all versions of Tor linked
23623 against OpenSSL 1.0.0 or later. Found by Florent Daignière.
23624 - Discard extraneous renegotiation attempts once the V3 link
23625 protocol has been initiated. Failure to do so left us open to
23626 a remotely triggerable assertion failure. Fixes CVE-2012-2249;
23627 bugfix on 0.2.3.6-alpha. Reported by "some guy from France".
23629 o Internal abstraction features:
23630 - Introduce new channel_t abstraction between circuits and
23631 or_connection_t to allow for implementing alternate OR-to-OR
23632 transports. A channel_t is an abstract object which can either be a
23633 cell-bearing channel, which is responsible for authenticating and
23634 handshaking with the remote OR and transmitting cells to and from
23635 it, or a listening channel, which spawns new cell-bearing channels
23636 at the request of remote ORs. Implements part of ticket 6465.
23637 - Also new is the channel_tls_t subclass of channel_t, adapting it
23638 to the existing or_connection_t code. The V2/V3 protocol handshaking
23639 code which formerly resided in command.c has been moved below the
23640 channel_t abstraction layer and may be found in channeltls.c now.
23641 Implements the rest of ticket 6465.
23642 - Introduce new circuitmux_t storing the queue of circuits for
23643 a channel; this encapsulates and abstracts the queue logic and
23644 circuit selection policy, and allows the latter to be overridden
23645 easily by switching out a policy object. The existing EWMA behavior
23646 is now implemented as a circuitmux_policy_t. Resolves ticket 6816.
23648 o Required libraries:
23649 - Tor now requires OpenSSL 0.9.8 or later. OpenSSL 1.0.0 or later is
23650 strongly recommended.
23653 - Warn users who run hidden services on a Tor client with
23654 UseEntryGuards disabled that their hidden services will be
23655 vulnerable to http://freehaven.net/anonbib/#hs-attack06 (the
23656 attack which motivated Tor to support entry guards in the first
23657 place). Resolves ticket 6889.
23658 - Tor now builds correctly on Bitrig, an OpenBSD fork. Patch from
23659 dhill. Resolves ticket 6982.
23660 - Option OutboundBindAddress can be specified multiple times and
23661 accepts IPv6 addresses. Resolves ticket 6876.
23663 o Minor bugfixes (also in 0.2.3.23-rc):
23664 - Don't serve or accept v2 hidden service descriptors over a
23665 relay's DirPort. It's never correct to do so, and disabling it
23666 might make it more annoying to exploit any bugs that turn up in the
23667 descriptor-parsing code. Fixes bug 7149.
23668 - Fix two cases in src/or/transports.c where we were calling
23669 fmt_addr() twice in a parameter list. Bug found by David
23670 Fifield. Fixes bug 7014; bugfix on 0.2.3.9-alpha.
23671 - Fix memory leaks whenever we logged any message about the "path
23672 bias" detection. Fixes bug 7022; bugfix on 0.2.3.21-rc.
23673 - When relays refuse a "create" cell because their queue of pending
23674 create cells is too big (typically because their cpu can't keep up
23675 with the arrival rate), send back reason "resource limit" rather
23676 than reason "internal", so network measurement scripts can get a
23677 more accurate picture. Fixes bug 7037; bugfix on 0.1.1.11-alpha.
23680 - Command-line option "--version" implies "--quiet". Fixes bug 6997.
23681 - Free some more still-in-use memory at exit, to make hunting for
23682 memory leaks easier. Resolves bug 7029.
23683 - When a Tor client gets a "truncated" relay cell, the first byte of
23684 its payload specifies why the circuit was truncated. We were
23685 ignoring this 'reason' byte when tearing down the circuit, resulting
23686 in the controller not being told why the circuit closed. Now we
23687 pass the reason from the truncated cell to the controller. Bugfix
23688 on 0.1.2.3-alpha; fixes bug 7039.
23689 - Downgrade "Failed to hand off onionskin" messages to "debug"
23690 severity, since they're typically redundant with the "Your computer
23691 is too slow" messages. Fixes bug 7038; bugfix on 0.2.2.16-alpha.
23692 - Make clients running with IPv6 bridges connect over IPv6 again,
23693 even without setting new config options ClientUseIPv6 and
23694 ClientPreferIPv6ORPort. Fixes bug 6757; bugfix on 0.2.4.1-alpha.
23695 - Use square brackets around IPv6 addresses in numerous places
23696 that needed them, including log messages, HTTPS CONNECT proxy
23697 requests, TransportProxy statefile entries, and pluggable transport
23698 extra-info lines. Fixes bug 7011; patch by David Fifield.
23700 o Code refactoring and cleanup:
23701 - Source files taken from other packages now reside in src/ext;
23702 previously they were scattered around the rest of Tor.
23703 - Avoid use of reserved identifiers in our C code. The C standard
23704 doesn't like us declaring anything that starts with an
23705 underscore, so let's knock it off before we get in trouble. Fix
23706 for bug 1031; bugfix on the first Tor commit.
23709 Changes in version 0.2.3.23-rc - 2012-10-20
23710 Tor 0.2.3.23-rc adds a new v3 directory authority, fixes a privacy
23711 vulnerability introduced by a change in OpenSSL, and fixes a variety
23712 of smaller bugs in preparation for the release.
23714 o New directory authorities:
23715 - Add Faravahar (run by Sina Rabbani) as the ninth v3 directory
23716 authority. Closes ticket 5749.
23718 o Major bugfixes (security/privacy):
23719 - Disable TLS session tickets. OpenSSL's implementation was giving
23720 our TLS session keys the lifetime of our TLS context objects, when
23721 perfect forward secrecy would want us to discard anything that
23722 could decrypt a link connection as soon as the link connection
23723 was closed. Fixes bug 7139; bugfix on all versions of Tor linked
23724 against OpenSSL 1.0.0 or later. Found by Florent Daignière.
23725 - Discard extraneous renegotiation attempts once the V3 link
23726 protocol has been initiated. Failure to do so left us open to
23727 a remotely triggerable assertion failure. Fixes CVE-2012-2249;
23728 bugfix on 0.2.3.6-alpha. Reported by "some guy from France".
23731 - Fix a possible crash bug when checking for deactivated circuits
23732 in connection_or_flush_from_first_active_circuit(). Fixes bug 6341;
23733 bugfix on 0.2.2.7-alpha. Bug report and fix received pseudonymously.
23735 o Minor bugfixes (on 0.2.3.x):
23736 - Fix two cases in src/or/transports.c where we were calling
23737 fmt_addr() twice in a parameter list. Bug found by David
23738 Fifield. Fixes bug 7014; bugfix on 0.2.3.9-alpha.
23739 - Convert an assert in the pathbias code to a log message. The assert
23740 appears to only be triggerable by Tor2Web mode. Fixes bug 6866;
23741 bugfix on 0.2.3.17-beta.
23742 - Fix memory leaks whenever we logged any message about the "path
23743 bias" detection. Fixes bug 7022; bugfix on 0.2.3.21-rc.
23745 o Minor bugfixes (on 0.2.2.x and earlier):
23746 - Don't serve or accept v2 hidden service descriptors over a relay's
23747 DirPort. It's never correct to do so, and disabling it might
23748 make it more annoying to exploit any bugs that turn up in the
23749 descriptor-parsing code. Fixes bug 7149.
23750 - When relays refuse a "create" cell because their queue of pending
23751 create cells is too big (typically because their cpu can't keep up
23752 with the arrival rate), send back reason "resource limit" rather
23753 than reason "internal", so network measurement scripts can get a
23754 more accurate picture. Bugfix on 0.1.1.11-alpha; fixes bug 7037.
23755 - Correct file sizes when reading binary files on Cygwin, to avoid
23756 a bug where Tor would fail to read its state file. Fixes bug 6844;
23757 bugfix on 0.1.2.7-alpha.
23758 - Avoid undefined behavior when parsing the list of supported
23759 rendezvous/introduction protocols in a hidden service descriptor.
23760 Previously, Tor would have confused (as-yet-unused) protocol version
23761 numbers greater than 32 with lower ones on many platforms. Fixes
23762 bug 6827; bugfix on 0.2.0.10-alpha. Found by George Kadianakis.
23764 o Documentation fixes:
23765 - Clarify that hidden services are TCP only. Fixes bug 6024.
23768 Changes in version 0.2.4.3-alpha - 2012-09-22
23769 Tor 0.2.4.3-alpha fixes another opportunity for a remotely triggerable
23770 assertion, resumes letting relays test reachability of their DirPort,
23771 and cleans up a bunch of smaller bugs.
23774 - Fix an assertion failure in tor_timegm() that could be triggered
23775 by a badly formatted directory object. Bug found by fuzzing with
23776 Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
23779 - Fix a possible crash bug when checking for deactivated circuits
23780 in connection_or_flush_from_first_active_circuit(). Fixes bug 6341;
23781 bugfix on 0.2.2.7-alpha. Bug report and fix received pseudonymously.
23782 - Allow routers to detect that their own DirPorts are running. When
23783 we removed support for versions_supports_begindir, we also
23784 accidentally removed the mechanism we used to self-test our
23785 DirPort. Diagnosed with help from kargig. Fixes bugs 6814 and 6815;
23786 bugfix on 0.2.4.2-alpha.
23788 o Security features:
23789 - Switch to a completely time-invariant approach for picking nodes
23790 weighted by bandwidth. Our old approach would run through the
23791 part of the loop after it had made its choice slightly slower
23792 than it ran through the part of the loop before it had made its
23793 choice. Addresses ticket 6538.
23794 - Disable the use of Guard nodes when in Tor2WebMode. Guard usage
23795 by tor2web clients allows hidden services to identify tor2web
23796 clients through their repeated selection of the same rendezvous
23797 and introduction point circuit endpoints (their guards). Resolves
23801 - Enable Tor to read configuration, state, and key information from
23802 a FIFO. Previously Tor would only read from files with a positive
23803 stat.st_size. Code from meejah; fixes bug 6044.
23806 - Correct file sizes when reading binary files on Cygwin, to avoid
23807 a bug where Tor would fail to read its state file. Fixes bug 6844;
23808 bugfix on 0.1.2.7-alpha.
23809 - Correctly handle votes with more than 31 flags. Fixes bug 6853;
23810 bugfix on 0.2.0.3-alpha.
23811 - When complaining about a client port on a public address, log
23812 which address we're complaining about. Fixes bug 4020; bugfix on
23813 0.2.3.3-alpha. Patch by Tom Fitzhenry.
23814 - Convert an assert in the pathbias code to a log message. The assert
23815 appears to only be triggerable by Tor2Web mode. Fixes bug 6866;
23816 bugfix on 0.2.3.17-beta.
23817 - Our new buildsystem was overzealous about rebuilding manpages: it
23818 would rebuild them all whenever any one of them changed. Now our
23819 dependency checking should be correct. Fixes bug 6843; bugfix on
23821 - Don't do reachability testing over IPv6 unless AuthDirPublishIPv6
23822 is set. Fixes bug 6880. Bugfix on 0.2.4.1-alpha.
23823 - Correct log printout about which address family is preferred
23824 when connecting to a bridge with both an IPv4 and IPv6 OR port.
23825 Fixes bug 6884; bugfix on 0.2.4.1-alpha.
23827 o Minor bugfixes (code cleanliness):
23828 - Fix round_to_power_of_2() so it doesn't invoke undefined behavior
23829 with large values. This situation was untriggered, but nevertheless
23830 incorrect. Fixes bug 6831; bugfix on 0.2.0.1-alpha.
23831 - Reject consensus votes with more than 64 known-flags. We aren't even
23832 close to that limit yet, and our code doesn't handle it correctly.
23833 Fixes bug 6833; bugfix on 0.2.0.1-alpha.
23834 - Avoid undefined behavior when parsing the list of supported
23835 rendezvous/introduction protocols in a hidden service descriptor.
23836 Previously, Tor would have confused (as-yet-unused) protocol version
23837 numbers greater than 32 with lower ones on many platforms. Fixes
23838 bug 6827; bugfix on 0.2.0.10-alpha. Found by George Kadianakis.
23839 - Fix handling of rendezvous client authorization types over 8.
23840 Fixes bug 6861; bugfix on 0.2.1.5-alpha.
23841 - Fix building with older versions of GCC (2.95, for one) that don't
23842 like preprocessor directives inside macro arguments. Found by
23843 grarpamp. Fixes bug 6842; bugfix on 0.2.4.2-alpha.
23844 - Switch weighted node selection rule from using a list of doubles
23845 to using a list of int64_t. This change should make the process
23846 slightly easier to debug and maintain. Needed to finish ticket 6538.
23848 o Code simplification and refactoring:
23849 - Move the generic "config" code into a new file, and have "config.c"
23850 hold only torrc- and state-related code. Resolves ticket 6823.
23851 - Move the core of our "choose a weighted element at random" logic
23852 into its own function, and give it unit tests. Now the logic is
23853 testable, and a little less fragile too.
23854 - Removed the testing_since field of node_t, which hasn't been used
23855 for anything since 0.2.0.9-alpha.
23857 o Documentation fixes:
23858 - Clarify that hidden services are TCP only. Fixes bug 6024.
23859 - Resolve a typo in torrc.sample.in. Fixes bug 6819; bugfix on
23863 Changes in version 0.2.3.22-rc - 2012-09-11
23864 Tor 0.2.3.22-rc fixes another opportunity for a remotely triggerable
23868 - Fix an assertion failure in tor_timegm() that could be triggered
23869 by a badly formatted directory object. Bug found by fuzzing with
23870 Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
23873 - Avoid segfault when starting up having run with an extremely old
23874 version of Tor and parsing its state file. Fixes bug 6801; bugfix
23878 Changes in version 0.2.2.39 - 2012-09-11
23879 Tor 0.2.2.39 fixes two more opportunities for remotely triggerable
23883 - Fix an assertion failure in tor_timegm() that could be triggered
23884 by a badly formatted directory object. Bug found by fuzzing with
23885 Radamsa. Fixes bug 6811; bugfix on 0.2.0.20-rc.
23886 - Do not crash when comparing an address with port value 0 to an
23887 address policy. This bug could have been used to cause a remote
23888 assertion failure by or against directory authorities, or to
23889 allow some applications to crash clients. Fixes bug 6690; bugfix
23893 Changes in version 0.2.4.2-alpha - 2012-09-10
23894 Tor 0.2.4.2-alpha enables port forwarding for pluggable transports,
23895 raises the default rate limiting even more, and makes the bootstrapping
23896 log messages less noisy.
23899 - Automatically forward the TCP ports of pluggable transport
23900 proxies using tor-fw-helper if PortForwarding is enabled. Implements
23904 - Raise the default BandwidthRate/BandwidthBurst values from 5MB/10MB
23905 to 1GB/1GB. The previous defaults were intended to be "basically
23906 infinite", but it turns out they're now limiting our 100mbit+
23907 relays and bridges. Fixes bug 6605; bugfix on 0.2.0.10-alpha (the
23908 last time we raised it).
23911 - Detect when we're running with a version of OpenSSL other than the
23912 one we compiled with. This has occasionally given people hard-to-
23914 - Log fewer lines at level "notice" about our OpenSSL and Libevent
23915 versions and capabilities when everything is going right. Resolves
23916 part of ticket 6736.
23917 - Directory authorities no long accept descriptors for any version of
23918 Tor before 0.2.2.35, or for any 0.2.3 release before 0.2.3.10-alpha.
23919 These versions are insecure, unsupported, or both. Implements
23923 - Rename the (internal-use-only) UsingTestingNetworkDefaults option
23924 to start with a triple-underscore so the controller won't touch it.
23925 Patch by Meejah. Fixes bug 3155. Bugfix on 0.2.2.23-alpha.
23926 - Avoid segfault when starting up having run with an extremely old
23927 version of Tor and parsing its state file. Fixes bug 6801; bugfix
23929 - Rename the (testing-use-only) _UseFilteringSSLBufferevents option
23930 so it doesn't start with _. Fixes bug 3155. Bugfix on 0.2.3.1-alpha.
23931 - Don't follow the NULL pointer if microdescriptor generation fails.
23932 (This does not appear to be triggerable, but it's best to be safe.)
23933 Found by "f. tp.". Fixes bug 6797; bugfix on 0.2.4.1-alpha.
23934 - Fix mis-declared dependencies on src/common/crypto.c and
23935 src/or/tor_main.c that could break out-of-tree builds under some
23936 circumstances. Fixes bug 6778; bugfix on 0.2.4.1-alpha.
23937 - Avoid a warning when building common_sha1.i out of tree. Fixes bug
23938 6778; bugfix on 0.2.4.1-alpha.
23939 - Fix a harmless (in this case) build warning for implicitly
23940 converting a strlen() to an int. Bugfix on 0.2.4.1-alpha.
23942 o Removed features:
23943 - Now that all versions before 0.2.2.x are disallowed, we no longer
23944 need to work around their missing features. Thus we can remove a
23945 bunch of compatibility code.
23947 o Code refactoring:
23948 - Tweak tor-fw-helper to accept an arbitrary amount of arbitrary
23949 TCP ports to forward. In the past it only accepted two ports:
23950 the ORPort and the DirPort.
23953 Changes in version 0.2.4.1-alpha - 2012-09-05
23954 Tor 0.2.4.1-alpha lets bridges publish their pluggable transports to
23955 bridgedb; lets relays use IPv6 addresses and directory authorities
23956 advertise them; and switches to a cleaner build interface.
23958 This is the first alpha release in a new series, so expect there to
23959 be bugs. Users who would rather test out a more stable branch should
23960 stay with 0.2.3.x for now.
23962 o Major features (bridges):
23963 - Bridges now report the pluggable transports they support to the
23964 bridge authority, so it can pass the supported transports on to
23965 bridgedb and/or eventually do reachability testing. Implements
23968 o Major features (IPv6):
23969 - Bridge authorities now accept IPv6 bridge addresses and include
23970 them in network status documents. Implements ticket 5534.
23971 - Clients who set "ClientUseIPv6 1" may connect to entry nodes over
23972 IPv6. Set "ClientPreferIPv6ORPort 1" to make this even more likely
23973 to happen. Implements ticket 5535.
23974 - All kind of relays, not just bridges, can now advertise an IPv6
23975 OR port. Implements ticket 6362.
23976 - Directory authorities vote on IPv6 OR ports using the new consensus
23977 method 14. Implements ticket 6363.
23979 o Major features (build):
23980 - Switch to a nonrecursive Makefile structure. Now instead of each
23981 Makefile.am invoking other Makefile.am's, there is a master
23982 Makefile.am that includes the others. This change makes our build
23983 process slightly more maintainable, and improves parallelism for
23984 building with make -j. Original patch by Stewart Smith; various
23985 fixes by Jim Meyering.
23986 - Where available, we now use automake's "silent" make rules by
23987 default, so that warnings are easier to spot. You can get the old
23988 behavior with "make V=1". Patch by Stewart Smith for ticket 6522.
23990 o Minor features (code security and spec conformance):
23991 - Clear keys and key-derived material left on the stack in
23992 rendservice.c and rendclient.c. Check return value of
23993 crypto_pk_write_private_key_to_string() in rend_service_load_keys().
23994 These fixes should make us more forward-secure against cold-boot
23995 attacks and the like. Fixes bug 2385.
23996 - Reject EXTEND cells sent to nonexistent streams. According to the
23997 spec, an EXTEND cell sent to _any_ nonzero stream ID is invalid, but
23998 we were only checking for stream IDs that were currently in use.
23999 Found while hunting for more instances of bug 6271. Bugfix on
24000 0.0.2pre8, which introduced incremental circuit construction.
24002 o Minor features (streamlining);
24003 - No longer include the "opt" prefix when generating routerinfos
24004 or v2 directories: it has been needless since Tor 0.1.2. Closes
24006 - Remove some now-needless code that tried to aggressively flush
24007 OR connections as data was added to them. Since 0.2.0.1-alpha, our
24008 cell queue logic has saved us from the failure mode that this code
24009 was supposed to prevent. Removing this code will limit the number
24010 of baroque control flow paths through Tor's network logic. Reported
24011 pseudonymously on IRC. Fixes bug 6468; bugfix on 0.2.0.1-alpha.
24013 o Minor features (controller):
24014 - Add a "GETINFO signal/names" control port command. Implements
24016 - Provide default values for all options via "GETINFO config/defaults".
24017 Implements ticket 4971.
24019 o Minor features (IPv6):
24020 - New config option "AuthDirHasIPv6Connectivity 1" that directory
24021 authorities should set if they have IPv6 connectivity and want to
24022 do reachability tests for IPv6 relays. Implements feature 5974.
24023 - A relay with an IPv6 OR port now sends that address in NETINFO
24024 cells (in addition to its other address). Implements ticket 6364.
24026 o Minor features (log messages):
24027 - Omit the first heartbeat log message, because it never has anything
24028 useful to say, and it clutters up the bootstrapping messages.
24029 Resolves ticket 6758.
24030 - Don't log about reloading the microdescriptor cache at startup. Our
24031 bootstrap warnings are supposed to tell the user when there's a
24032 problem, and our bootstrap notices say when there isn't. Resolves
24033 ticket 6759; bugfix on 0.2.2.6-alpha.
24034 - Don't log "I learned some more directory information" when we're
24035 reading cached directory information. Reserve it for when new
24036 directory information arrives in response to a fetch. Resolves
24038 - Prevent rounding error in path bias counts when scaling
24039 them down, and use the correct scale factor default. Also demote
24040 some path bias related log messages down a level and make others
24041 less scary sounding. Fixes bug 6647. Bugfix against 0.2.3.17-beta.
24042 - We no longer warn so much when generating manpages from their
24045 o Code simplifications and refactoring:
24046 - Enhance our internal sscanf replacement so that we can eliminate
24047 the last remaining uses of the system sscanf. (Though those uses
24048 of sscanf were safe, sscanf itself is generally error prone, so
24049 we want to eliminate when we can.) Fixes ticket 4195 and Coverity
24051 - Move ipv6_preferred from routerinfo_t to node_t. Addresses bug 4620.
24052 - Move last_reachable and testing_since from routerinfo_t to node_t.
24053 Implements ticket 5529.
24054 - Add replaycache_t structure, functions and unit tests, then refactor
24055 rend_service_introduce() to be more clear to read, improve, debug,
24056 and test. Resolves bug 6177.
24057 - Finally remove support for malloc_good_size and malloc_usable_size.
24058 We had hoped that these functions would let us eke a little more
24059 memory out of our malloc implementation. Unfortunately, the only
24060 implementations that provided these functions are also ones that
24061 are already efficient about not overallocation: they never got us
24062 more than 7 or so bytes per allocation. Removing them saves us a
24063 little code complexity and a nontrivial amount of build complexity.
24065 o New requirements:
24066 - Tor maintainers now require Automake version 1.9 or later to build
24067 Tor from the Git repository. (Automake is not required when building
24068 from a source distribution.)
24071 Changes in version 0.2.3.21-rc - 2012-09-05
24072 Tor 0.2.3.21-rc is the fourth release candidate for the Tor 0.2.3.x
24073 series. It fixes a trio of potential security bugs, fixes a bug where
24074 we were leaving some of the fast relays out of the microdescriptor
24075 consensus, resumes interpreting "ORPort 0" and "DirPort 0" correctly,
24076 and cleans up other smaller issues.
24078 o Major bugfixes (security):
24079 - Tear down the circuit if we get an unexpected SENDME cell. Clients
24080 could use this trick to make their circuits receive cells faster
24081 than our flow control would have allowed, or to gum up the network,
24082 or possibly to do targeted memory denial-of-service attacks on
24083 entry nodes. Fixes bug 6252. Bugfix on the 54th commit on Tor --
24084 from July 2002, before the release of Tor 0.0.0. We had committed
24085 this patch previously, but we had to revert it because of bug 6271.
24086 Now that 6271 is fixed, this patch appears to work.
24087 - Reject any attempt to extend to an internal address. Without
24088 this fix, a router could be used to probe addresses on an internal
24089 network to see whether they were accepting connections. Fixes bug
24090 6710; bugfix on 0.0.8pre1.
24091 - Do not crash when comparing an address with port value 0 to an
24092 address policy. This bug could have been used to cause a remote
24093 assertion failure by or against directory authorities, or to
24094 allow some applications to crash clients. Fixes bug 6690; bugfix
24098 - Remove the upper bound on microdescriptor length. We were hitting
24099 the limit for routers with complex exit policies or family
24100 declarations, causing clients to not use them. Fixes the first
24101 piece of bug 6404; fix on 0.2.2.6-alpha.
24102 - Detect "ORPort 0" as meaning, uniformly, that we're not running
24103 as a relay. Previously, some of our code would treat the presence
24104 of any ORPort line as meaning that we should act like a relay,
24105 even though our new listener code would correctly not open any
24106 ORPorts for ORPort 0. Similar bugs in other Port options are also
24107 fixed. Fixes the first half of bug 6507; bugfix on 0.2.3.3-alpha.
24110 - Avoid a pair of double-free and use-after-mark bugs that can
24111 occur with certain timings in canceled and re-received DNS
24112 requests. Fixes bug 6472; bugfix on 0.0.7rc1.
24113 - Fix build and 64-bit compile warnings from --enable-openbsd-malloc.
24114 Fixes bug 6379. Bugfix on 0.2.0.20-rc.
24115 - Allow one-hop directory fetching circuits the full "circuit build
24116 timeout" period, rather than just half of it, before failing them
24117 and marking the relay down. This fix should help reduce cases where
24118 clients declare relays (or worse, bridges) unreachable because
24119 the TLS handshake takes a few seconds to complete. Fixes bug 6743;
24120 bugfix on 0.2.2.2-alpha, where we changed the timeout from a static
24122 - Authorities no longer include any router in their microdescriptor
24123 consensuses for which they couldn't generate or agree on a
24124 microdescriptor. Fixes the second piece of bug 6404; fix on
24126 - Detect and reject attempts to specify both "FooPort" and
24127 "FooPort 0" in the same configuration domain. (It's still okay
24128 to have a FooPort in your configuration file, and use "FooPort 0"
24129 on the command line to disable it.) Fixes the second half of bug
24130 6507; bugfix on 0.2.3.3-alpha.
24131 - Make wildcarded addresses (that is, ones beginning with "*.") work
24132 when provided via the controller's MapAddress command. Previously,
24133 they were accepted, but we never actually noticed that they were
24134 wildcards. Fixes bug 6244; bugfix on 0.2.3.9-alpha.
24135 - Avoid crashing on a malformed state file where EntryGuardPathBias
24136 precedes EntryGuard. Fix for bug 6774; bugfix on 0.2.3.17-beta.
24137 - Add a (probably redundant) memory clear between iterations of
24138 the router status voting loop, to prevent future coding errors
24139 where data might leak between iterations of the loop. Resolves
24142 o Minor bugfixes (log messages):
24143 - Downgrade "set buildtimeout to low value" messages to "info"
24144 severity; they were never an actual problem, there was never
24145 anything reasonable to do about them, and they tended to spam logs
24146 from time to time. Fixes bug 6251; bugfix on 0.2.2.2-alpha.
24147 - Downgrade path-bias warning messages to "info". We'll try to get
24148 them working better in 0.2.4. Add internal circuit construction
24149 state to protect against the noisy warn message "Unexpectedly high
24150 circuit_successes". Also add some additional rate-limited notice
24151 messages to help determine the root cause of the warn. Fixes bug
24152 6475. Bugfix against 0.2.3.17-beta.
24153 - Move log message when unable to find a microdesc in a routerstatus
24154 entry to parse time. Previously we'd spam this warning every time
24155 we tried to figure out which microdescriptors to download. Fixes
24156 the third piece of bug 6404; fix on 0.2.3.18-rc.
24159 - Consider new, removed or changed IPv6 OR ports a non-cosmetic
24160 change when the authority is deciding whether to accept a newly
24161 uploaded descriptor. Implements ticket 6423.
24162 - Add missing documentation for consensus and microdesc files.
24163 Resolves ticket 6732.
24166 Changes in version 0.2.2.38 - 2012-08-12
24167 Tor 0.2.2.38 fixes a remotely triggerable crash bug, and fixes a timing
24168 attack that could in theory leak path information.
24171 - Avoid an uninitialized memory read when reading a vote or consensus
24172 document that has an unrecognized flavor name. This read could
24173 lead to a remote crash bug. Fixes bug 6530; bugfix on 0.2.2.6-alpha.
24174 - Try to leak less information about what relays a client is
24175 choosing to a side-channel attacker. Previously, a Tor client would
24176 stop iterating through the list of available relays as soon as it
24177 had chosen one, thus finishing a little earlier when it picked
24178 a router earlier in the list. If an attacker can recover this
24179 timing information (nontrivial but not proven to be impossible),
24180 they could learn some coarse-grained information about which relays
24181 a client was picking (middle nodes in particular are likelier to
24182 be affected than exits). The timing attack might be mitigated by
24183 other factors (see bug 6537 for some discussion), but it's best
24184 not to take chances. Fixes bug 6537; bugfix on 0.0.8rc1.
24187 Changes in version 0.2.3.20-rc - 2012-08-05
24188 Tor 0.2.3.20-rc is the third release candidate for the Tor 0.2.3.x
24189 series. It fixes a pair of code security bugs and a potential anonymity
24190 issue, updates our RPM spec files, and cleans up other smaller issues.
24193 - Avoid read-from-freed-memory and double-free bugs that could occur
24194 when a DNS request fails while launching it. Fixes bug 6480;
24195 bugfix on 0.2.0.1-alpha.
24196 - Avoid an uninitialized memory read when reading a vote or consensus
24197 document that has an unrecognized flavor name. This read could
24198 lead to a remote crash bug. Fixes bug 6530; bugfix on 0.2.2.6-alpha.
24199 - Try to leak less information about what relays a client is
24200 choosing to a side-channel attacker. Previously, a Tor client would
24201 stop iterating through the list of available relays as soon as it
24202 had chosen one, thus finishing a little earlier when it picked
24203 a router earlier in the list. If an attacker can recover this
24204 timing information (nontrivial but not proven to be impossible),
24205 they could learn some coarse-grained information about which relays
24206 a client was picking (middle nodes in particular are likelier to
24207 be affected than exits). The timing attack might be mitigated by
24208 other factors (see bug 6537 for some discussion), but it's best
24209 not to take chances. Fixes bug 6537; bugfix on 0.0.8rc1.
24212 - Try to make the warning when giving an obsolete SOCKSListenAddress
24213 a little more useful.
24214 - Terminate active server managed proxies if Tor stops being a
24215 relay. Addresses parts of bug 6274; bugfix on 0.2.3.6-alpha.
24216 - Provide a better error message about possible OSX Asciidoc failure
24217 reasons. Fixes bug 6436.
24218 - Warn when Tor is configured to use accounting in a way that can
24219 link a hidden service to some other hidden service or public
24220 address. Resolves ticket 6490.
24223 - Check return value of fputs() when writing authority certificate
24224 file. Fixes Coverity issue 709056; bugfix on 0.2.0.1-alpha.
24225 - Ignore ServerTransportPlugin lines when Tor is not configured as
24226 a relay. Fixes bug 6274; bugfix on 0.2.3.6-alpha.
24227 - When disabling guards for having too high a proportion of failed
24228 circuits, make sure to look at each guard. Fixes bug 6397; bugfix
24232 - Update our default RPM spec files to work with mock and rpmbuild
24233 on RHEL/Fedora. They have an updated set of dependencies and
24234 conflicts, a fix for an ancient typo when creating the "_tor"
24235 user, and better instructions. Thanks to Ondrej Mikle for the
24236 patch series. Fixes bug 6043.
24239 - Make it possible to set the TestingTorNetwork configuration
24240 option using AlternateDirAuthority and AlternateBridgeAuthority
24241 as an alternative to setting DirServer. Addresses ticket 6377.
24244 - Clarify the documentation for the Alternate*Authority options.
24246 - Fix some typos in the manpages. Patch from A. Costa. Fixes bug 6500.
24248 o Code simplification and refactoring:
24249 - Do not use SMARTLIST_FOREACH for any loop whose body exceeds
24250 10 lines. Also, don't nest them. Doing so in the past has
24251 led to hard-to-debug code. The new style is to use the
24252 SMARTLIST_FOREACH_{BEGIN,END} pair. Addresses issue 6400.
24255 Changes in version 0.2.3.19-rc - 2012-07-06
24256 Tor 0.2.3.19-rc is the second release candidate for the Tor 0.2.3.x
24257 series. It fixes the compile on Windows, reverts to a GeoIP database
24258 that isn't as broken, and fixes a flow control bug that has been around
24259 since the beginning of Tor.
24262 - Fix a bug handling SENDME cells on nonexistent streams that could
24263 result in bizarre window values. Report and patch contributed
24264 pseudonymously. Fixes part of bug 6271. This bug was introduced
24265 before the first Tor release, in svn commit r152.
24266 - Revert to the May 1 2012 Maxmind GeoLite Country database. In the
24267 June 2012 database, Maxmind marked many Tor relays as country "A1",
24268 which will cause risky behavior for clients that set EntryNodes
24269 or ExitNodes. Addresses bug 6334; bugfix on 0.2.3.17-beta.
24270 - Instead of ENOBUFS on Windows, say WSAENOBUFS. Fixes compilation
24271 on Windows. Fixes bug 6296; bugfix on 0.2.3.18-rc.
24274 - Fix wrong TCP port range in parse_port_range(). Fixes bug 6218;
24275 bugfix on 0.2.1.10-alpha.
24278 Changes in version 0.2.3.18-rc - 2012-06-28
24279 Tor 0.2.3.18-rc is the first release candidate for the Tor 0.2.3.x
24280 series. It fixes a few smaller bugs, but generally appears stable.
24281 Please test it and let us know whether it is!
24284 - Allow wildcarded mapaddress targets to be specified on the
24285 controlport. Partially fixes bug 6244; bugfix on 0.2.3.9-alpha.
24286 - Make our linker option detection code more robust against linkers
24287 such as on FreeBSD 8, where a bad combination of options completes
24288 successfully but makes an unrunnable binary. Fixes bug 6173;
24289 bugfix on 0.2.3.17-beta.
24291 o Minor bugfixes (on 0.2.2.x and earlier):
24292 - Avoid a false positive in the util/threads unit test by increasing
24293 the maximum timeout time. Fixes bug 6227; bugfix on 0.2.0.4-alpha.
24294 - Replace "Sending publish request" log messages with "Launching
24295 upload", so that they no longer confusingly imply that we're
24296 sending something to a directory we might not even be connected
24297 to yet. Fixes bug 3311; bugfix on 0.2.0.10-alpha.
24298 - Make sure to set *socket_error in all error cases in
24299 connection_connect(), so it can't produce a warning about
24300 errno being zero from errno_to_orconn_end_reason(). Bugfix on
24301 0.2.1.1-alpha; resolves ticket 6028.
24302 - Downgrade "Got a certificate, but we already have it" log messages
24303 from warning to info, except when we're a dirauth. Fixes bug 5238;
24304 bugfix on 0.2.1.7-alpha.
24305 - When checking for requested signatures on the latest consensus
24306 before serving it to a client, make sure to check the right
24307 consensus flavor. Bugfix on 0.2.2.6-alpha.
24308 - Downgrade "eventdns rejected address" message to LOG_PROTOCOL_WARN.
24309 Fixes bug 5932; bugfix on 0.2.2.7-alpha.
24311 o Minor bugfixes (on 0.2.3.x):
24312 - Make format_helper_exit_status() avoid unnecessary space padding
24313 and stop confusing log_from_pipe(). Fixes ticket 5557; bugfix
24315 - Downgrade a message about cleaning the microdescriptor cache to
24316 "info" from "notice". Fixes bug 6238; bugfix on 0.2.3.1-alpha.
24317 - Log a BUG message at severity INFO if we have a networkstatus with
24318 a missing entry for some microdescriptor. Continues on a patch
24320 - Improve the log message when a managed proxy fails to launch. Fixes
24321 bug 5099; bugfix on 0.2.3.6-alpha.
24322 - Don't do DNS lookups when parsing corrupted managed proxy protocol
24323 messages. Fixes bug 6226; bugfix on 0.2.3.6-alpha.
24324 - When formatting wildcarded address mappings for the controller,
24325 be sure to include "*." as appropriate. Partially fixes bug 6244;
24326 bugfix on 0.2.3.9-alpha.
24327 - Avoid a warning caused by using strcspn() from glibc with clang 3.0.
24328 Bugfix on 0.2.3.13-alpha.
24329 - Stop logging messages about running with circuit timeout learning
24330 enabled at severity LD_BUG. Fixes bug 6169; bugfix on 0.2.3.17-beta.
24331 - Disable a spurious warning about reading on a marked and flushing
24332 connection. We shouldn't be doing that, but apparently we
24333 sometimes do. Fixes bug 6203; bugfix on 0.2.3.17-beta.
24334 - Fix a bug that stopped AllowDotExit from working on addresses
24335 that had an entry in the DNS cache. Fixes bug 6211; bugfix on
24338 o Code simplification, refactoring, unit tests:
24339 - Move tor_gettimeofday_cached() into compat_libevent.c, and use
24340 Libevent's notion of cached time when possible.
24341 - Remove duplicate code for invoking getrlimit() from control.c.
24342 - Add a unit test for the environment_variable_names_equal function.
24345 - Document the --defaults-torrc option, and the new (in 0.2.3)
24346 semantics for overriding, extending, and clearing lists of
24347 options. Closes bug 4748.
24350 Changes in version 0.2.3.17-beta - 2012-06-15
24351 Tor 0.2.3.17-beta enables compiler and linker hardening by default,
24352 gets our TLS handshake back on track for being able to blend in with
24353 Firefox, fixes a big bug in 0.2.3.16-alpha that broke Tor's interaction
24354 with Vidalia, and otherwise continues to get us closer to a release
24358 - Enable gcc and ld hardening by default. Resolves ticket 5210.
24359 - Update TLS cipher list to match Firefox 8 and later. Resolves
24361 - Implement the client side of proposal 198: remove support for
24362 clients falsely claiming to support standard ciphersuites that
24363 they can actually provide. As of modern OpenSSL versions, it's not
24364 necessary to fake any standard ciphersuite, and doing so prevents
24365 us from using better ciphersuites in the future, since servers
24366 can't know whether an advertised ciphersuite is really supported or
24367 not. Some hosts -- notably, ones with very old versions of OpenSSL
24368 or where OpenSSL has been built with ECC disabled -- will stand
24369 out because of this change; TBB users should not be affected.
24372 - Change the default value for DynamicDHGroups (introduced in
24373 0.2.3.9-alpha) to 0. This feature can make Tor relays less
24374 identifiable by their use of the mod_ssl DH group, but at
24375 the cost of some usability (#4721) and bridge tracing (#6087)
24376 regressions. Resolves ticket 5598.
24377 - Send a CRLF at the end of each STATUS_* control protocol event. This
24378 bug tickled a bug in Vidalia which would make it freeze. Fixes
24379 bug 6094; bugfix on 0.2.3.16-alpha.
24382 - Disable writing on marked-for-close connections when they are
24383 blocked on bandwidth, to prevent busy-looping in Libevent. Fixes
24384 bug 5263; bugfix on 0.0.2pre13, where we first added a special
24385 case for flushing marked connections.
24386 - Detect SSL handshake even when the initial attempt to write the
24387 server hello fails. Fixes bug 4592; bugfix on 0.2.0.13-alpha.
24388 - Change the AllowDotExit rules so they should actually work.
24389 We now enforce AllowDotExit only immediately after receiving an
24390 address via SOCKS or DNSPort: other sources are free to provide
24391 .exit addresses after the resolution occurs. Fixes bug 3940;
24392 bugfix on 0.2.2.1-alpha.
24393 - Fix a (harmless) integer overflow in cell statistics reported by
24394 some fast relays. Fixes bug 5849; bugfix on 0.2.2.1-alpha.
24395 - Make sure circuitbuild.c checks LearnCircuitBuildTimeout in all the
24396 right places and never depends on the consensus parameters or
24397 computes adaptive timeouts when it is disabled. Fixes bug 5049;
24398 bugfix on 0.2.2.14-alpha.
24399 - When building Tor on Windows with -DUNICODE (not default), ensure
24400 that error messages, filenames, and DNS server names are always
24401 NUL-terminated when we convert them to a single-byte encoding.
24402 Fixes bug 5909; bugfix on 0.2.2.16-alpha.
24403 - Make Tor build correctly again with -DUNICODE -D_UNICODE defined.
24404 Fixes bug 6097; bugfix on 0.2.2.16-alpha.
24405 - Fix an edge case where TestingTorNetwork is set but the authorities
24406 and relays all have an uptime of zero, where the private Tor network
24407 could briefly lack support for hidden services. Fixes bug 3886;
24408 bugfix on 0.2.2.18-alpha.
24409 - Correct the manpage's descriptions for the default values of
24410 DirReqStatistics and ExtraInfoStatistics. Fixes bug 2865; bugfix
24412 - Fix the documentation for the --hush and --quiet command line
24413 options, which changed their behavior back in 0.2.3.3-alpha.
24414 - Fix compilation warning with clang 3.1. Fixes bug 6141; bugfix on
24418 - Rate-limit the "Weighted bandwidth is 0.000000" message, and add
24419 more information to it, so that we can track it down in case it
24420 returns again. Mitigates bug 5235.
24421 - Check CircuitBuildTimeout and LearnCircuitBuildTimeout in
24422 options_validate(); warn if LearnCircuitBuildTimeout is disabled and
24423 CircuitBuildTimeout is set unreasonably low. Resolves ticket 5452.
24424 - Warn the user when HTTPProxy, but no other proxy type, is
24425 configured. This can cause surprising behavior: it doesn't send
24426 all of Tor's traffic over the HTTPProxy -- it sends unencrypted
24427 directory traffic only. Resolves ticket 4663.
24428 - Issue a notice if a guard completes less than 40% of your circuits.
24429 Threshold is configurable by torrc option PathBiasNoticeRate and
24430 consensus parameter pb_noticepct. There is additional, off-by-
24431 default code to disable guards which fail too many circuits.
24432 Addresses ticket 5458.
24433 - Update to the June 6 2012 Maxmind GeoLite Country database.
24435 o Code simplifications and refactoring:
24436 - Remove validate_pluggable_transports_config(): its warning
24437 message is now handled by connection_or_connect().
24440 Changes in version 0.2.2.37 - 2012-06-06
24441 Tor 0.2.2.37 introduces a workaround for a critical renegotiation
24442 bug in OpenSSL 1.0.1 (where 20% of the Tor network can't talk to itself
24446 - Work around a bug in OpenSSL that broke renegotiation with TLS
24447 1.1 and TLS 1.2. Without this workaround, all attempts to speak
24448 the v2 Tor connection protocol when both sides were using OpenSSL
24449 1.0.1 would fail. Resolves ticket 6033.
24450 - When waiting for a client to renegotiate, don't allow it to add
24451 any bytes to the input buffer. This fixes a potential DoS issue.
24452 Fixes bugs 5934 and 6007; bugfix on 0.2.0.20-rc.
24453 - Fix an edge case where if we fetch or publish a hidden service
24454 descriptor, we might build a 4-hop circuit and then use that circuit
24455 for exiting afterwards -- even if the new last hop doesn't obey our
24456 ExitNodes config option. Fixes bug 5283; bugfix on 0.2.0.10-alpha.
24459 - Fix a build warning with Clang 3.1 related to our use of vasprintf.
24460 Fixes bug 5969. Bugfix on 0.2.2.11-alpha.
24463 - Tell GCC and Clang to check for any errors in format strings passed
24464 to the tor_v*(print|scan)f functions.
24467 Changes in version 0.2.3.16-alpha - 2012-06-05
24468 Tor 0.2.3.16-alpha introduces a workaround for a critical renegotiation
24469 bug in OpenSSL 1.0.1 (where 20% of the Tor network can't talk to itself
24470 currently). It also fixes a variety of smaller bugs and other cleanups
24471 that get us closer to a release candidate.
24473 o Major bugfixes (general):
24474 - Work around a bug in OpenSSL that broke renegotiation with TLS
24475 1.1 and TLS 1.2. Without this workaround, all attempts to speak
24476 the v2 Tor connection protocol when both sides were using OpenSSL
24477 1.0.1 would fail. Resolves ticket 6033.
24478 - When waiting for a client to renegotiate, don't allow it to add
24479 any bytes to the input buffer. This fixes a potential DoS issue.
24480 Fixes bugs 5934 and 6007; bugfix on 0.2.0.20-rc.
24481 - Pass correct OR address to managed proxies (like obfsproxy),
24482 even when ORListenAddress is used. Fixes bug 4865; bugfix on
24484 - The advertised platform of a router now includes only its operating
24485 system's name (e.g., "Linux", "Darwin", "Windows 7"), and not its
24486 service pack level (for Windows) or its CPU architecture (for Unix).
24487 We also no longer include the "git-XYZ" tag in the version. Resolves
24490 o Major bugfixes (clients):
24491 - If we are unable to find any exit that supports our predicted ports,
24492 stop calling them predicted, so that we don't loop and build
24493 hopeless circuits indefinitely. Fixes bug 3296; bugfix on 0.0.9pre6,
24494 which introduced predicted ports.
24495 - Fix an edge case where if we fetch or publish a hidden service
24496 descriptor, we might build a 4-hop circuit and then use that circuit
24497 for exiting afterwards -- even if the new last hop doesn't obey our
24498 ExitNodes config option. Fixes bug 5283; bugfix on 0.2.0.10-alpha.
24499 - Check at each new consensus whether our entry guards were picked
24500 long enough ago that we should rotate them. Previously, we only
24501 did this check at startup, which could lead to us holding a guard
24502 indefinitely. Fixes bug 5380; bugfix on 0.2.1.14-rc.
24503 - When fetching a bridge descriptor from a bridge authority,
24504 always do so anonymously, whether we have been able to open
24505 circuits or not. Partial fix for bug 1938; bugfix on 0.2.0.7-alpha.
24506 This behavior makes it *safer* to use UpdateBridgesFromAuthority,
24507 but we'll need to wait for bug 6010 before it's actually usable.
24509 o Major bugfixes (directory authorities):
24510 - When computing weight parameters, behave more robustly in the
24511 presence of a bad bwweightscale value. Previously, the authorities
24512 would crash if they agreed on a sufficiently broken weight_scale
24513 value: now, they use a reasonable default and carry on. Partial
24514 fix for 5786; bugfix on 0.2.2.17-alpha.
24515 - Check more thoroughly to prevent a rogue authority from
24516 double-voting on any consensus directory parameter. Previously,
24517 authorities would crash in this case if the total number of
24518 votes for any parameter exceeded the number of active voters,
24519 but would let it pass otherwise. Partial fix for bug 5786; bugfix
24523 - Rate-limit log messages when asked to connect anonymously to
24524 a private address. When these hit, they tended to hit fast and
24525 often. Also, don't bother trying to connect to addresses that we
24526 are sure will resolve to 127.0.0.1: getting 127.0.0.1 in a directory
24527 reply makes us think we have been lied to, even when the address the
24528 client tried to connect to was "localhost." Resolves ticket 2822.
24529 - Allow packagers to insert an extra string in server descriptor
24530 platform lines by setting the preprocessor variable TOR_BUILD_TAG.
24531 Resolves the rest of ticket 2988.
24532 - Raise the threshold of server descriptors needed (75%) and exit
24533 server descriptors needed (50%) before we will declare ourselves
24534 bootstrapped. This will make clients start building circuits a
24535 little later, but makes the initially constructed circuits less
24536 skewed and less in conflict with further directory fetches. Fixes
24538 - Close any connection that sends unrecognized junk before the
24539 handshake. Solves an issue noted in bug 4369.
24540 - Improve log messages about managed transports. Resolves ticket 5070.
24541 - Tag a bridge's descriptor as "never to be sent unencrypted".
24542 This shouldn't matter, since bridges don't open non-anonymous
24543 connections to the bridge authority and don't allow unencrypted
24544 directory connections from clients, but we might as well make
24545 sure. Closes bug 5139.
24546 - Expose our view of whether we have gone dormant to the controller,
24547 via a new "GETINFO dormant" value. Torbutton and other controllers
24548 can use this to avoid doing periodic requests through Tor while
24549 it's dormant (bug 4718). Fixes bug 5954.
24550 - Tell GCC and Clang to check for any errors in format strings passed
24551 to the tor_v*(print|scan)f functions.
24552 - Update to the May 1 2012 Maxmind GeoLite Country database.
24554 o Minor bugfixes (already included in 0.2.2.36):
24555 - Reject out-of-range times like 23:59:61 in parse_rfc1123_time().
24556 Fixes bug 5346; bugfix on 0.0.8pre3.
24557 - Correct parsing of certain date types in parse_http_time().
24558 Without this patch, If-Modified-Since would behave
24559 incorrectly. Fixes bug 5346; bugfix on 0.2.0.2-alpha. Patch from
24560 Esteban Manchado Velázques.
24561 - Make our number-parsing functions always treat too-large values
24562 as an error, even when those values exceed the width of the
24563 underlying type. Previously, if the caller provided these
24564 functions with minima or maxima set to the extreme values of the
24565 underlying integer type, these functions would return those
24566 values on overflow rather than treating overflow as an error.
24567 Fixes part of bug 5786; bugfix on 0.0.9.
24568 - If we hit the error case where routerlist_insert() replaces an
24569 existing (old) server descriptor, make sure to remove that
24570 server descriptor from the old_routers list. Fix related to bug
24571 1776. Bugfix on 0.2.2.18-alpha.
24572 - Clarify the behavior of MaxCircuitDirtiness with hidden service
24573 circuits. Fixes issue 5259.
24575 o Minor bugfixes (coding cleanup, on 0.2.2.x and earlier):
24576 - Prevent a null-pointer dereference when receiving a data cell
24577 for a nonexistent stream when the circuit in question has an
24578 empty deliver window. We don't believe this is triggerable,
24579 since we don't currently allow deliver windows to become empty,
24580 but the logic is tricky enough that it's better to make the code
24581 robust. Fixes bug 5541; bugfix on 0.0.2pre14.
24582 - Fix a memory leak when trying to launch a DNS request when the
24583 network is disabled or the nameservers are unconfigurable. Fixes
24584 bug 5916; bugfix on Tor 0.1.2.1-alpha (for the unconfigurable
24585 nameserver case) and on 0.2.3.9-alpha (for the DisableNetwork case).
24586 - Don't hold a Windows file handle open for every file mapping;
24587 the file mapping handle is sufficient. Fixes bug 5951; bugfix on
24589 - Avoid O(n^2) performance characteristics when parsing a large
24590 extrainfo cache. Fixes bug 5828; bugfix on 0.2.0.1-alpha.
24591 - Format more doubles with %f, not %lf. Patch from grarpamp to make
24592 Tor build correctly on older BSDs again. Fixes bug 3894; bugfix on
24594 - Make our replacement implementation of strtok_r() compatible with
24595 the standard behavior of strtok_r(). Patch by nils. Fixes bug 5091;
24596 bugfix on 0.2.2.1-alpha.
24597 - Fix a NULL-pointer dereference on a badly formed
24598 SETCIRCUITPURPOSE command. Found by mikeyc. Fixes bug 5796;
24599 bugfix on 0.2.2.9-alpha.
24600 - Fix a build warning with Clang 3.1 related to our use of vasprintf.
24601 Fixes bug 5969. Bugfix on 0.2.2.11-alpha.
24602 - Defensively refactor rend_mid_rendezvous() so that protocol
24603 violations and length checks happen in the beginning. Fixes
24605 - Set _WIN32_WINNT to 0x0501 consistently throughout the code, so
24606 that IPv6 stuff will compile on MSVC, and compilation issues
24607 will be easier to track down. Fixes bug 5861.
24609 o Minor bugfixes (correctness, on 0.2.2.x and earlier):
24610 - Exit nodes now correctly report EADDRINUSE and EADDRNOTAVAIL as
24611 resource exhaustion, so that clients can adjust their load to
24612 try other exits. Fixes bug 4710; bugfix on 0.1.0.1-rc, which
24613 started using END_STREAM_REASON_RESOURCELIMIT.
24614 - Don't check for whether the address we're using for outbound
24615 connections has changed until after the outbound connection has
24616 completed. On Windows, getsockname() doesn't succeed until the
24617 connection is finished. Fixes bug 5374; bugfix on 0.1.1.14-alpha.
24618 - If the configuration tries to set MyFamily on a bridge, refuse to
24619 do so, and warn about the security implications. Fixes bug 4657;
24620 bugfix on 0.2.0.3-alpha.
24621 - If the client fails to set a reasonable set of ciphersuites
24622 during its v2 handshake renegotiation, allow the renegotiation to
24623 continue nevertheless (i.e. send all the required certificates).
24624 Fixes bug 4591; bugfix on 0.2.0.20-rc.
24625 - When we receive a SIGHUP and the controller __ReloadTorrcOnSIGHUP
24626 option is set to 0 (which Vidalia version 0.2.16 now does when
24627 a SAVECONF attempt fails), perform other actions that SIGHUP
24628 usually causes (like reopening the logs). Fixes bug 5095; bugfix
24630 - If we fail to write a microdescriptor to the disk cache, do not
24631 continue replacing the old microdescriptor file. Fixes bug 2954;
24632 bugfix on 0.2.2.6-alpha.
24633 - Exit nodes don't need to fetch certificates for authorities that
24634 they don't recognize; only directory authorities, bridges,
24635 and caches need to do that. Fixes part of bug 2297; bugfix on
24637 - Correctly handle checking the permissions on the parent
24638 directory of a control socket in the root directory. Bug found
24639 by Esteban Manchado Velázquez. Fixes bug 5089; bugfix on Tor
24641 - When told to add a bridge with the same digest as a preexisting
24642 bridge but a different addr:port, change the addr:port as
24643 requested. Previously we would not notice the change. Fixes half
24644 of bug 5603; fix on 0.2.2.26-beta.
24645 - End AUTHCHALLENGE error messages (in the control protocol) with
24646 a CRLF. Fixes bug 5760; bugfix on 0.2.2.36 and 0.2.3.13-alpha.
24648 o Minor bugfixes (on 0.2.3.x):
24649 - Turn an assertion (that the number of handshakes received as a
24650 server is not < 1) into a warning. Fixes bug 4873; bugfix on
24652 - Format IPv4 addresses correctly in ADDRMAP events. (Previously,
24653 we had reversed them when the answer was cached.) Fixes bug
24654 5723; bugfix on 0.2.3.1-alpha.
24655 - Work correctly on Linux systems with accept4 support advertised in
24656 their headers, but without accept4 support in the kernel. Fix
24657 by murb. Fixes bug 5762; bugfix on 0.2.3.1-alpha.
24658 - When told to add a bridge with the same addr:port as a preexisting
24659 bridge but a different transport, change the transport as
24660 requested. Previously we would not notice the change. Fixes half
24661 of bug 5603; fix on 0.2.3.2-alpha.
24662 - Avoid a "double-reply" warning when replying to a SOCKS request
24663 with a parse error. Patch from Fabian Keil. Fixes bug 4108;
24664 bugfix on 0.2.3.4-alpha.
24665 - Fix a bug where a bridge authority crashes if it has seen no
24666 directory requests when it's time to write statistics to disk.
24667 Fixes bug 5891; bugfix on 0.2.3.6-alpha. Also fixes bug 5508 in
24669 - Don't try to open non-control listeners when DisableNetwork is set.
24670 Previously, we'd open all listeners, then immediately close them.
24671 Fixes bug 5604; bugfix on 0.2.3.9-alpha.
24672 - Don't abort the managed proxy protocol if the managed proxy
24673 sends us an unrecognized line; ignore it instead. Fixes bug
24674 5910; bugfix on 0.2.3.9-alpha.
24675 - Fix a compile warning in crypto.c when compiling with clang 3.1.
24676 Fixes bug 5969, bugfix on 0.2.3.9-alpha.
24677 - Fix a compilation issue on GNU Hurd, which doesn't have PATH_MAX.
24678 Fixes bug 5355; bugfix on 0.2.3.11-alpha.
24679 - Remove bogus definition of "_WIN32" from src/win32/orconfig.h, to
24680 unbreak the MSVC build. Fixes bug 5858; bugfix on 0.2.3.12-alpha.
24681 - Resolve numerous small warnings and build issues with MSVC. Resolves
24684 o Documentation fixes:
24685 - Improve the manual's documentation for the NT Service command-line
24686 options. Addresses ticket 3964.
24687 - Clarify SessionGroup documentation slightly; resolves ticket 5437.
24688 - Document the changes to the ORPort and DirPort options, and the
24689 fact that {OR/Dir}ListenAddress is now unnecessary (and
24690 therefore deprecated). Resolves ticket 5597.
24693 - Remove the torrc.bridge file: we don't use it for anything, and
24694 it had become badly desynchronized from torrc.sample. Resolves
24698 Changes in version 0.2.2.36 - 2012-05-24
24699 Tor 0.2.2.36 updates the addresses for two of the eight directory
24700 authorities, fixes some potential anonymity and security issues,
24701 and fixes several crash bugs.
24703 Tor 0.2.1.x has reached its end-of-life. Those Tor versions have many
24704 known flaws, and nobody should be using them. You should upgrade. If
24705 you're using a Linux or BSD and its packages are obsolete, stop using
24706 those packages and upgrade anyway.
24708 o Directory authority changes:
24709 - Change IP address for maatuska (v3 directory authority).
24710 - Change IP address for ides (v3 directory authority), and rename
24714 - When building or running with any version of OpenSSL earlier
24715 than 0.9.8s or 1.0.0f, disable SSLv3 support. These OpenSSL
24716 versions have a bug (CVE-2011-4576) in which their block cipher
24717 padding includes uninitialized data, potentially leaking sensitive
24718 information to any peer with whom they make a SSLv3 connection. Tor
24719 does not use SSL v3 by default, but a hostile client or server
24720 could force an SSLv3 connection in order to gain information that
24721 they shouldn't have been able to get. The best solution here is to
24722 upgrade to OpenSSL 0.9.8s or 1.0.0f (or later). But when building
24723 or running with a non-upgraded OpenSSL, we disable SSLv3 entirely
24724 to make sure that the bug can't happen.
24725 - Never use a bridge or a controller-supplied node as an exit, even
24726 if its exit policy allows it. Found by wanoskarnet. Fixes bug
24727 5342. Bugfix on 0.1.1.15-rc (for controller-purpose descriptors)
24728 and 0.2.0.3-alpha (for bridge-purpose descriptors).
24729 - Only build circuits if we have a sufficient threshold of the total
24730 descriptors that are marked in the consensus with the "Exit"
24731 flag. This mitigates an attack proposed by wanoskarnet, in which
24732 all of a client's bridges collude to restrict the exit nodes that
24733 the client knows about. Fixes bug 5343.
24734 - Provide controllers with a safer way to implement the cookie
24735 authentication mechanism. With the old method, if another locally
24736 running program could convince a controller that it was the Tor
24737 process, then that program could trick the controller into telling
24738 it the contents of an arbitrary 32-byte file. The new "SAFECOOKIE"
24739 authentication method uses a challenge-response approach to prevent
24740 this attack. Fixes bug 5185; implements proposal 193.
24743 - Avoid logging uninitialized data when unable to decode a hidden
24744 service descriptor cookie. Fixes bug 5647; bugfix on 0.2.1.5-alpha.
24745 - Avoid a client-side assertion failure when receiving an INTRODUCE2
24746 cell on a general purpose circuit. Fixes bug 5644; bugfix on
24748 - Fix builds when the path to sed, openssl, or sha1sum contains
24749 spaces, which is pretty common on Windows. Fixes bug 5065; bugfix
24751 - Correct our replacements for the timeradd() and timersub() functions
24752 on platforms that lack them (for example, Windows). The timersub()
24753 function is used when expiring circuits, while timeradd() is
24754 currently unused. Bug report and patch by Vektor. Fixes bug 4778;
24755 bugfix on 0.2.2.24-alpha.
24756 - Fix the SOCKET_OK test that we use to tell when socket
24757 creation fails so that it works on Win64. Fixes part of bug 4533;
24758 bugfix on 0.2.2.29-beta. Bug found by wanoskarnet.
24761 - Reject out-of-range times like 23:59:61 in parse_rfc1123_time().
24762 Fixes bug 5346; bugfix on 0.0.8pre3.
24763 - Make our number-parsing functions always treat too-large values
24764 as an error, even when those values exceed the width of the
24765 underlying type. Previously, if the caller provided these
24766 functions with minima or maxima set to the extreme values of the
24767 underlying integer type, these functions would return those
24768 values on overflow rather than treating overflow as an error.
24769 Fixes part of bug 5786; bugfix on 0.0.9.
24770 - Older Linux kernels erroneously respond to strange nmap behavior
24771 by having accept() return successfully with a zero-length
24772 socket. When this happens, just close the connection. Previously,
24773 we would try harder to learn the remote address: but there was
24774 no such remote address to learn, and our method for trying to
24775 learn it was incorrect. Fixes bugs 1240, 4745, and 4747. Bugfix
24776 on 0.1.0.3-rc. Reported and diagnosed by "r1eo".
24777 - Correct parsing of certain date types in parse_http_time().
24778 Without this patch, If-Modified-Since would behave
24779 incorrectly. Fixes bug 5346; bugfix on 0.2.0.2-alpha. Patch from
24780 Esteban Manchado Velázques.
24781 - Change the BridgePassword feature (part of the "bridge community"
24782 design, which is not yet implemented) to use a time-independent
24783 comparison. The old behavior might have allowed an adversary
24784 to use timing to guess the BridgePassword value. Fixes bug 5543;
24785 bugfix on 0.2.0.14-alpha.
24786 - Detect and reject certain misformed escape sequences in
24787 configuration values. Previously, these values would cause us
24788 to crash if received in a torrc file or over an authenticated
24789 control port. Bug found by Esteban Manchado Velázquez, and
24790 independently by Robert Connolly from Matta Consulting who further
24791 noted that it allows a post-authentication heap overflow. Patch
24792 by Alexander Schrijver. Fixes bugs 5090 and 5402 (CVE 2012-1668);
24793 bugfix on 0.2.0.16-alpha.
24794 - Fix a compile warning when using the --enable-openbsd-malloc
24795 configure option. Fixes bug 5340; bugfix on 0.2.0.20-rc.
24796 - During configure, detect when we're building with clang version
24797 3.0 or lower and disable the -Wnormalized=id and -Woverride-init
24798 CFLAGS. clang doesn't support them yet.
24799 - When sending an HTTP/1.1 proxy request, include a Host header.
24800 Fixes bug 5593; bugfix on 0.2.2.1-alpha.
24801 - Fix a NULL-pointer dereference on a badly formed SETCIRCUITPURPOSE
24802 command. Found by mikeyc. Fixes bug 5796; bugfix on 0.2.2.9-alpha.
24803 - If we hit the error case where routerlist_insert() replaces an
24804 existing (old) server descriptor, make sure to remove that
24805 server descriptor from the old_routers list. Fix related to bug
24806 1776. Bugfix on 0.2.2.18-alpha.
24808 o Minor bugfixes (documentation and log messages):
24809 - Fix a typo in a log message in rend_service_rendezvous_has_opened().
24810 Fixes bug 4856; bugfix on Tor 0.0.6.
24811 - Update "ClientOnly" man page entry to explain that there isn't
24812 really any point to messing with it. Resolves ticket 5005.
24813 - Document the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays
24814 directory authority option (introduced in Tor 0.2.2.34).
24815 - Downgrade the "We're missing a certificate" message from notice
24816 to info: people kept mistaking it for a real problem, whereas it
24817 is seldom the problem even when we are failing to bootstrap. Fixes
24818 bug 5067; bugfix on 0.2.0.10-alpha.
24819 - Correctly spell "connect" in a log message on failure to create a
24820 controlsocket. Fixes bug 4803; bugfix on 0.2.2.26-beta.
24821 - Clarify the behavior of MaxCircuitDirtiness with hidden service
24822 circuits. Fixes issue 5259.
24825 - Directory authorities now reject versions of Tor older than
24826 0.2.1.30, and Tor versions between 0.2.2.1-alpha and 0.2.2.20-alpha
24827 inclusive. These versions accounted for only a small fraction of
24828 the Tor network, and have numerous known security issues. Resolves
24830 - Update to the May 1 2012 Maxmind GeoLite Country database.
24833 - When sending or relaying a RELAY_EARLY cell, we used to convert
24834 it to a RELAY cell if the connection was using the v1 link
24835 protocol. This was a workaround for older versions of Tor, which
24836 didn't handle RELAY_EARLY cells properly. Now that all supported
24837 versions can handle RELAY_EARLY cells, and now that we're enforcing
24838 the "no RELAY_EXTEND commands except in RELAY_EARLY cells" rule,
24839 remove this workaround. Addresses bug 4786.
24842 Changes in version 0.2.3.15-alpha - 2012-04-30
24843 Tor 0.2.3.15-alpha fixes a variety of smaller bugs, including making
24844 the development branch build on Windows again.
24846 o Minor bugfixes (on 0.2.2.x and earlier):
24847 - Make sure that there are no unhandled pending TLS errors before
24848 reading from a TLS stream. We had checks in 0.1.0.3-rc, but
24849 lost them in 0.1.0.5-rc when we refactored read_to_buf_tls().
24850 Bugfix on 0.1.0.5-rc; fixes bug 4528.
24851 - Fix an assert that directory authorities could trigger on sighup
24852 during some configuration state transitions. We now don't treat
24853 it as a fatal error when the new descriptor we just generated in
24854 init_keys() isn't accepted. Fixes bug 4438; bugfix on 0.2.1.9-alpha.
24855 - After we pick a directory mirror, we would refuse to use it if
24856 it's in our ExcludeExitNodes list, resulting in mysterious failures
24857 to bootstrap for people who just wanted to avoid exiting from
24858 certain locations. Fixes bug 5623; bugfix on 0.2.2.25-alpha.
24859 - When building with --enable-static-tor on OpenBSD, do not
24860 erroneously attempt to link -lrt. Fixes bug 5103.
24862 o Minor bugfixes (on 0.2.3.x):
24863 - When Tor is built with kernel headers from a recent (last few
24864 years) Linux kernel, do not fail to run on older (pre-2.6.28
24865 Linux kernels). Fixes bug 5112; bugfix on 0.2.3.1-alpha.
24866 - Fix cross-compilation issues with mingw. Bugfixes on 0.2.3.6-alpha
24867 and 0.2.3.12-alpha.
24868 - Fix compilation with miniupnpc version 1.6; patch from
24869 Anthony G. Basile. Fixes bug 5434; bugfix on 0.2.3.12-alpha.
24870 - Fix compilation with MSVC, which had defined MS_WINDOWS. Bugfix
24871 on 0.2.3.13-alpha; found and fixed by Gisle Vanem.
24872 - Fix compilation on platforms without unistd.h, or where environ
24873 is defined in stdlib.h. Fixes bug 5704; bugfix on 0.2.3.13-alpha.
24876 - Directory authorities are now a little more lenient at accepting
24877 older router descriptors, or newer router descriptors that don't
24878 make big changes. This should help ameliorate past and future
24879 issues where routers think they have uploaded valid descriptors,
24880 but the authorities don't think so. Fix for ticket 2479.
24881 - Make the code that clients use to detect an address change be
24882 IPv6-aware, so that it won't fill clients' logs with error
24883 messages when trying to get the IPv4 address of an IPv6
24884 connection. Implements ticket 5537.
24886 o Removed features:
24887 - Remove the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays option;
24888 authorities needed to use it for a while to keep the network working
24889 as people upgraded to 0.2.1.31, 0.2.2.34, or 0.2.3.6-alpha, but
24890 that was six months ago. As of now, it should no longer be needed
24894 Changes in version 0.2.3.14-alpha - 2012-04-23
24895 Tor 0.2.3.14-alpha fixes yet more bugs to get us closer to a release
24896 candidate. It also dramatically speeds up AES: fast relays should
24897 consider switching to the newer OpenSSL library.
24899 o Directory authority changes:
24900 - Change IP address for ides (v3 directory authority), and rename
24904 - Avoid logging uninitialized data when unable to decode a hidden
24905 service descriptor cookie. Fixes bug 5647; bugfix on 0.2.1.5-alpha.
24906 - Avoid a client-side assertion failure when receiving an INTRODUCE2
24907 cell on a general purpose circuit. Fixes bug 5644; bugfix on
24909 - If authorities are unable to get a v2 consensus document from other
24910 directory authorities, they no longer fall back to fetching
24911 them from regular directory caches. Fixes bug 5635; bugfix on
24912 0.2.2.26-beta, where routers stopped downloading v2 consensus
24913 documents entirely.
24914 - When we start a Tor client with a normal consensus already cached,
24915 be willing to download a microdescriptor consensus. Fixes bug 4011;
24916 fix on 0.2.3.1-alpha.
24918 o Major features (performance):
24919 - When built to use OpenSSL 1.0.1, and built for an x86 or x86_64
24920 instruction set, take advantage of OpenSSL's AESNI, bitsliced, or
24921 vectorized AES implementations as appropriate. These can be much,
24922 much faster than other AES implementations.
24924 o Minor bugfixes (0.2.2.x and earlier):
24925 - Don't launch more than 10 service-side introduction-point circuits
24926 for a hidden service in five minutes. Previously, we would consider
24927 launching more introduction-point circuits if at least one second
24928 had passed without any introduction-point circuits failing. Fixes
24929 bug 4607; bugfix on 0.0.7pre1.
24930 - Change the BridgePassword feature (part of the "bridge community"
24931 design, which is not yet implemented) to use a time-independent
24932 comparison. The old behavior might have allowed an adversary
24933 to use timing to guess the BridgePassword value. Fixes bug 5543;
24934 bugfix on 0.2.0.14-alpha.
24935 - Enforce correct return behavior of tor_vsscanf() when the '%%'
24936 pattern is used. Fixes bug 5558. Bugfix on 0.2.1.13.
24937 - When sending an HTTP/1.1 proxy request, include a Host header.
24938 Fixes bug 5593; bugfix on 0.2.2.1-alpha.
24939 - Don't log that we have "decided to publish new relay descriptor"
24940 unless we are actually publishing a descriptor. Fixes bug 3942;
24941 bugfix on 0.2.2.28-beta.
24943 o Minor bugfixes (0.2.3.x):
24944 - Fix a bug where a bridge authority crashes (on a failed assert)
24945 if it has seen no directory requests when it's time to write
24946 statistics to disk. Fixes bug 5508. Bugfix on 0.2.3.6-alpha.
24947 - Fix bug stomping on ORPort option NoListen and ignoring option
24948 NoAdvertise. Fixes bug 5151; bugfix on 0.2.3.9-alpha.
24949 - In the testsuite, provide a large enough buffer in the tor_sscanf
24950 unit test. Otherwise we'd overrun that buffer and crash during
24951 the unit tests. Found by weasel. Fixes bug 5449; bugfix on
24953 - Make sure we create the keys directory if it doesn't exist and we're
24954 about to store the dynamic Diffie-Hellman parameters. Fixes bug
24955 5572; bugfix on 0.2.3.13-alpha.
24956 - Fix a small memory leak when trying to decode incorrect base16
24957 authenticator during SAFECOOKIE authentication. Found by
24958 Coverity Scan. Fixes CID 507. Bugfix on 0.2.3.13-alpha.
24961 - Add more information to a log statement that might help track down
24962 bug 4091. If you're seeing "Bug: tor_addr_is_internal() called with a
24963 non-IP address" messages (or any Bug messages, for that matter!),
24964 please let us know about it.
24965 - Relays now understand an IPv6 address when they get one from a
24966 directory server. Resolves ticket 4875.
24967 - Resolve IPv6 addresses in bridge and entry statistics to country
24968 code "??" which means we at least count them. Resolves ticket 5053;
24969 improves on 0.2.3.9-alpha.
24970 - Update to the April 3 2012 Maxmind GeoLite Country database.
24971 - Begin a doc/state-contents.txt file to explain the contents of
24972 the Tor state file. Fixes bug 2987.
24974 o Default torrc changes:
24975 - Stop listing "socksport 9050" in torrc.sample. We open a socks
24976 port on 9050 by default anyway, so this should not change anything
24978 - Stop mentioning the deprecated *ListenAddress options in
24979 torrc.sample. Fixes bug 5438.
24980 - Document unit of bandwidth related options in sample torrc.
24983 o Removed features:
24984 - The "torify" script no longer supports the "tsocks" socksifier
24985 tool, since tsocks doesn't support DNS and UDP right for Tor.
24986 Everyone should be using torsocks instead. Fixes bugs 3530 and
24987 5180. Based on a patch by "ugh".
24989 o Code refactoring:
24990 - Change the symmetric cipher interface so that creating and
24991 initializing a stream cipher are no longer separate functions.
24992 - Remove all internal support for unpadded RSA. We never used it, and
24993 it would be a bad idea to start.
24996 Changes in version 0.2.3.13-alpha - 2012-03-26
24997 Tor 0.2.3.13-alpha fixes a variety of stability and correctness bugs
24998 in managed pluggable transports, as well as providing other cleanups
24999 that get us closer to a release candidate.
25001 o Directory authority changes:
25002 - Change IP address for maatuska (v3 directory authority).
25005 - Provide controllers with a safer way to implement the cookie
25006 authentication mechanism. With the old method, if another locally
25007 running program could convince a controller that it was the Tor
25008 process, then that program could trick the controller into telling
25009 it the contents of an arbitrary 32-byte file. The new "SAFECOOKIE"
25010 authentication method uses a challenge-response approach to prevent
25011 this attack. Fixes bug 5185, implements proposal 193.
25012 - Never use a bridge or a controller-supplied node as an exit, even
25013 if its exit policy allows it. Found by wanoskarnet. Fixes bug
25014 5342. Bugfix on 0.1.1.15-rc (for controller-purpose descriptors)
25015 and 0.2.0.3-alpha (for bridge-purpose descriptors).
25016 - Only build circuits if we have a sufficient threshold of the total
25017 descriptors that are marked in the consensus with the "Exit"
25018 flag. This mitigates an attack proposed by wanoskarnet, in which
25019 all of a client's bridges collude to restrict the exit nodes that
25020 the client knows about. Fixes bug 5343.
25022 o Major bugfixes (on Tor 0.2.3.x):
25023 - Avoid an assert when managed proxies like obfsproxy are configured,
25024 and we receive HUP signals or setconf attempts too rapidly. This
25025 situation happens most commonly when Vidalia tries to attach to
25026 Tor or tries to configure the Tor it's attached to. Fixes bug 5084;
25027 bugfix on 0.2.3.6-alpha.
25028 - Fix a relay-side pluggable transports bug where managed proxies were
25029 unreachable from the Internet, because Tor asked them to bind on
25030 localhost. Fixes bug 4725; bugfix on 0.2.3.9-alpha.
25031 - Stop discarding command-line arguments when TestingTorNetwork
25032 is set. Discovered by Kevin Bauer. Fixes bug 5373; bugfix on
25033 0.2.3.9-alpha, where task 4552 added support for two layers of
25035 - Resume allowing the unit tests to run in gdb. This was accidentally
25036 made impossible when the DisableDebuggerAttachment option was
25037 introduced. Fixes bug 5448; bugfix on 0.2.3.9-alpha.
25038 - Resume building with nat-pmp support. Fixes bug 4955; bugfix on
25039 0.2.3.11-alpha. Reported by Anthony G. Basile.
25041 o Minor bugfixes (on 0.2.2.x and earlier):
25042 - Ensure we don't cannibalize circuits that are longer than three hops
25043 already, so we don't end up making circuits with 5 or more
25044 hops. Patch contributed by wanoskarnet. Fixes bug 5231; bugfix on
25045 0.1.0.1-rc which introduced cannibalization.
25046 - Detect and reject certain misformed escape sequences in
25047 configuration values. Previously, these values would cause us
25048 to crash if received in a torrc file or over an authenticated
25049 control port. Bug found by Esteban Manchado Velázquez, and
25050 independently by Robert Connolly from Matta Consulting who further
25051 noted that it allows a post-authentication heap overflow. Patch
25052 by Alexander Schrijver. Fixes bugs 5090 and 5402 (CVE 2012-1668);
25053 bugfix on 0.2.0.16-alpha.
25054 - Fix a compile warning when using the --enable-openbsd-malloc
25055 configure option. Fixes bug 5340; bugfix on 0.2.0.20-rc.
25056 - Directory caches no longer refuse to clean out descriptors because
25057 of missing v2 networkstatus documents, unless they're configured
25058 to retrieve v2 networkstatus documents. Fixes bug 4838; bugfix on
25059 0.2.2.26-beta. Patch by Daniel Bryg.
25060 - Update to the latest version of the tinytest unit testing framework.
25061 This includes a couple of bugfixes that can be relevant for
25062 running forked unit tests on Windows, and removes all reserved
25065 o Minor bugfixes (on 0.2.3.x):
25066 - On a failed pipe() call, don't leak file descriptors. Fixes bug
25067 4296; bugfix on 0.2.3.1-alpha.
25068 - Spec conformance: on a v3 handshake, do not send a NETINFO cell
25069 until after we have received a CERTS cell. Fixes bug 4361; bugfix
25070 on 0.2.3.6-alpha. Patch by "frosty".
25071 - When binding to an IPv6 address, set the IPV6_V6ONLY socket
25072 option, so that the IP stack doesn't decide to use it for IPv4
25073 too. Fixes bug 4760; bugfix on 0.2.3.9-alpha.
25074 - Ensure that variables set in Tor's environment cannot override
25075 environment variables that Tor passes to a managed
25076 pluggable-transport proxy. Previously, Tor would pass every
25077 variable in its environment to managed proxies along with the new
25078 ones, in such a way that on many operating systems, the inherited
25079 environment variables would override those which Tor tried to
25080 explicitly set. Bugfix on 0.2.3.12-alpha for most Unixoid systems;
25081 bugfix on 0.2.3.9-alpha for Windows.
25084 - A wide variety of new unit tests by Esteban Manchado Velázquez.
25085 - Shorten links in the tor-exit-notice file. Patch by Christian Kujau.
25086 - Update to the March 6 2012 Maxmind GeoLite Country database.
25089 Changes in version 0.2.3.12-alpha - 2012-02-13
25090 Tor 0.2.3.12-alpha lets fast exit relays scale better, allows clients
25091 to use bridges that run Tor 0.2.2.x, and resolves several big bugs
25092 when Tor is configured to use a pluggable transport like obfsproxy.
25095 - Fix builds when the path to sed, openssl, or sha1sum contains
25096 spaces, which is pretty common on Windows. Fixes bug 5065; bugfix
25098 - Set the SO_REUSEADDR socket option before we call bind() on outgoing
25099 connections. This change should allow busy exit relays to stop
25100 running out of available sockets as quickly. Fixes bug 4950;
25101 bugfix on 0.2.2.26-beta.
25102 - Allow 0.2.3.x clients to use 0.2.2.x bridges. Previously the client
25103 would ask the bridge for microdescriptors, which are only supported
25104 in 0.2.3.x, and then fail to bootstrap when it didn't get the
25105 answers it wanted. Fixes bug 4013; bugfix on 0.2.3.2-alpha.
25106 - Properly set up obfsproxy's environment when in managed mode. The
25107 Tor Browser Bundle needs LD_LIBRARY_PATH to be passed to obfsproxy,
25108 and when you run your Tor as a daemon, there's no HOME. Fixes bugs
25109 5076 and 5082; bugfix on 0.2.3.6-alpha.
25112 - Use the dead_strip option when building Tor on OS X. This reduces
25113 binary size by almost 19% when linking openssl and libevent
25114 statically, which we do for Tor Browser Bundle.
25115 - Fix broken URLs in the sample torrc file, and tell readers about
25116 the OutboundBindAddress, ExitPolicyRejectPrivate, and
25117 PublishServerDescriptor options. Addresses bug 4652.
25118 - Update to the February 7 2012 Maxmind GeoLite Country database.
25121 - Downgrade the "We're missing a certificate" message from notice
25122 to info: people kept mistaking it for a real problem, whereas it
25123 is seldom the problem even when we are failing to bootstrap. Fixes
25124 bug 5067; bugfix on 0.2.0.10-alpha.
25125 - Don't put "TOR_PT_EXTENDED_SERVER_PORT=127.0.0.1:4200" in a
25126 managed pluggable transport server proxy's environment.
25127 Previously, we would put it there, even though Tor doesn't
25128 implement an 'extended server port' yet, and even though Tor
25129 almost certainly isn't listening at that address. For now, we set
25130 it to an empty string to avoid crashing older obfsproxies. Bugfix
25132 - Log the heartbeat message every HeartbeatPeriod seconds, not every
25133 HeartbeatPeriod + 1 seconds. Fixes bug 4942; bugfix on
25134 0.2.3.1-alpha. Bug reported by Scott Bennett.
25135 - Calculate absolute paths correctly on Windows. Fixes bug 4973;
25136 bugfix on 0.2.3.11-alpha.
25137 - Update "ClientOnly" man page entry to explain that there isn't
25138 really any point to messing with it. Resolves ticket 5005.
25139 - Use the correct CVE number for CVE-2011-4576 in our comments and
25140 log messages. Found by "fermenthor". Resolves bug 5066; bugfix on
25143 o Code simplifications and refactoring:
25144 - Use the _WIN32 macro throughout our code to detect Windows.
25145 (Previously we had used the obsolete 'WIN32' and the idiosyncratic
25149 Changes in version 0.2.3.11-alpha - 2012-01-22
25150 Tor 0.2.3.11-alpha marks feature-freeze for the 0.2.3 tree. It deploys
25151 the last step of the plan to limit maximum circuit length, includes
25152 a wide variety of hidden service performance and correctness fixes,
25153 works around an OpenSSL security flaw if your distro is too stubborn
25154 to upgrade, and fixes a bunch of smaller issues.
25157 - Now that Tor 0.2.0.x is completely deprecated, enable the final
25158 part of "Proposal 110: Avoiding infinite length circuits" by
25159 refusing all circuit-extend requests that do not use a relay_early
25160 cell. This change helps Tor resist a class of denial-of-service
25161 attacks by limiting the maximum circuit length.
25162 - Adjust the number of introduction points that a hidden service
25163 will try to maintain based on how long its introduction points
25164 remain in use and how many introductions they handle. Fixes
25166 - Try to use system facilities for enumerating local interface
25167 addresses, before falling back to our old approach (which was
25168 binding a UDP socket, and calling getsockname() on it). That
25169 approach was scaring OS X users whose draconian firewall
25170 software warned about binding to UDP sockets, regardless of
25171 whether packets were sent. Now we try to use getifaddrs(),
25172 SIOCGIFCONF, or GetAdaptersAddresses(), depending on what the
25173 system supports. Resolves ticket 1827.
25175 o Major security workaround:
25176 - When building or running with any version of OpenSSL earlier
25177 than 0.9.8s or 1.0.0f, disable SSLv3 support. These OpenSSL
25178 versions have a bug (CVE-2011-4576) in which their block cipher
25179 padding includes uninitialized data, potentially leaking sensitive
25180 information to any peer with whom they make a SSLv3 connection. Tor
25181 does not use SSL v3 by default, but a hostile client or server
25182 could force an SSLv3 connection in order to gain information that
25183 they shouldn't have been able to get. The best solution here is to
25184 upgrade to OpenSSL 0.9.8s or 1.0.0f (or later). But when building
25185 or running with a non-upgraded OpenSSL, we disable SSLv3 entirely
25186 to make sure that the bug can't happen.
25189 - Fix the SOCKET_OK test that we use to tell when socket
25190 creation fails so that it works on Win64. Fixes part of bug 4533;
25191 bugfix on 0.2.2.29-beta. Bug found by wanoskarnet.
25192 - Correct our replacements for the timeradd() and timersub() functions
25193 on platforms that lack them (for example, Windows). The timersub()
25194 function is used when expiring circuits, while timeradd() is
25195 currently unused. Bug report and patch by Vektor. Fixes bug 4778;
25196 bugfix on 0.2.2.24-alpha and 0.2.3.1-alpha.
25197 - Do not use OpenSSL 1.0.0's counter mode: it has a critical bug
25198 that was fixed in OpenSSL 1.0.0a. We test for the counter mode
25199 bug at runtime, not compile time, because some distributions hack
25200 their OpenSSL to mis-report its version. Fixes bug 4779; bugfix
25201 on 0.2.3.9-alpha. Found by Pascal.
25203 o Minor features (controller):
25204 - Use absolute path names when reporting the torrc filename in the
25205 control protocol, so a controller can more easily find the torrc
25206 file. Resolves bug 1101.
25207 - Extend the control protocol to report flags that control a circuit's
25208 path selection in CIRC events and in replies to 'GETINFO
25209 circuit-status'. Implements part of ticket 2411.
25210 - Extend the control protocol to report the hidden service address
25211 and current state of a hidden-service-related circuit in CIRC
25212 events and in replies to 'GETINFO circuit-status'. Implements part
25214 - When reporting the path to the cookie file to the controller,
25215 give an absolute path. Resolves ticket 4881.
25216 - Allow controllers to request an event notification whenever a
25217 circuit is cannibalized or its purpose is changed. Implements
25218 part of ticket 3457.
25219 - Include the creation time of a circuit in CIRC and CIRC2
25220 control-port events and the list produced by the 'GETINFO
25221 circuit-status' control-port command.
25223 o Minor features (directory authorities):
25224 - Directory authorities now reject versions of Tor older than
25225 0.2.1.30, and Tor versions between 0.2.2.1-alpha and 0.2.2.20-alpha
25226 inclusive. These versions accounted for only a small fraction of
25227 the Tor network, and have numerous known security issues. Resolves
25229 - Authority operators can now vote for all relays in a given
25230 set of countries to be BadDir/BadExit/Invalid/Rejected.
25231 - Provide two consensus parameters (FastFlagMinThreshold and
25232 FastFlagMaxThreshold) to control the range of allowable bandwidths
25233 for the Fast directory flag. These allow authorities to run
25234 experiments on appropriate requirements for being a "Fast" node.
25235 The AuthDirFastGuarantee config value still applies. Implements
25237 - Document the GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays
25238 directory authority option (introduced in Tor 0.2.2.34).
25240 o Minor features (other):
25241 - Don't disable the DirPort when we cannot exceed our AccountingMax
25242 limit during this interval because the effective bandwidthrate is
25243 low enough. This is useful in a situation where AccountMax is only
25244 used as an additional safeguard or to provide statistics.
25245 - Prepend an informative header to generated dynamic_dh_params files.
25246 - If EntryNodes are given, but UseEntryGuards is set to 0, warn that
25247 EntryNodes will have no effect. Resolves issue 2571.
25248 - Log more useful messages when we fail to disable debugger
25250 - Log which authority we're missing votes from when we go to fetch
25251 them from the other auths.
25252 - Log (at debug level) whenever a circuit's purpose is changed.
25253 - Add missing documentation for the MaxClientCircuitsPending,
25254 UseMicrodescriptors, UserspaceIOCPBuffers, and
25255 _UseFilteringSSLBufferevents options, all introduced during
25256 the 0.2.3.x series.
25257 - Update to the January 3 2012 Maxmind GeoLite Country database.
25259 o Minor bugfixes (hidden services):
25260 - Don't close hidden service client circuits which have almost
25261 finished connecting to their destination when they reach
25262 the normal circuit-build timeout. Previously, we would close
25263 introduction circuits which are waiting for an acknowledgement
25264 from the introduction point, and rendezvous circuits which have
25265 been specified in an INTRODUCE1 cell sent to a hidden service,
25266 after the normal CBT. Now, we mark them as 'timed out', and launch
25267 another rendezvous attempt in parallel. This behavior change can
25268 be disabled using the new CloseHSClientCircuitsImmediatelyOnTimeout
25269 option. Fixes part of bug 1297; bugfix on 0.2.2.2-alpha.
25270 - Don't close hidden-service-side rendezvous circuits when they
25271 reach the normal circuit-build timeout. This behavior change can
25272 be disabled using the new
25273 CloseHSServiceRendCircuitsImmediatelyOnTimeout option. Fixes the
25274 remaining part of bug 1297; bugfix on 0.2.2.2-alpha.
25275 - Make sure we never mark the wrong rendezvous circuit as having
25276 had its introduction cell acknowledged by the introduction-point
25277 relay. Previously, when we received an INTRODUCE_ACK cell on a
25278 client-side hidden-service introduction circuit, we might have
25279 marked a rendezvous circuit other than the one we specified in
25280 the INTRODUCE1 cell as INTRO_ACKED, which would have produced
25281 a warning message and interfered with the hidden service
25282 connection-establishment process. Fixes bug 4759; bugfix on
25283 0.2.3.3-alpha, when we added the stream-isolation feature which
25284 might cause Tor to open multiple rendezvous circuits for the same
25286 - Don't trigger an assertion failure when we mark a new client-side
25287 hidden-service introduction circuit for close during the process
25288 of creating it. Fixes bug 4796; bugfix on 0.2.3.6-alpha. Reported
25291 o Minor bugfixes (log messages):
25292 - Correctly spell "connect" in a log message on failure to create a
25293 controlsocket. Fixes bug 4803; bugfix on 0.2.2.26-beta and
25295 - Fix a typo in a log message in rend_service_rendezvous_has_opened().
25296 Fixes bug 4856; bugfix on Tor 0.0.6.
25297 - Fix the log message describing how we work around discovering
25298 that our version is the ill-fated OpenSSL 0.9.8l. Fixes bug
25299 4837; bugfix on 0.2.2.9-alpha.
25300 - When logging about a disallowed .exit name, do not also call it
25301 an "invalid onion address". Fixes bug 3325; bugfix on 0.2.2.9-alpha.
25303 o Minor bugfixes (build fixes):
25304 - During configure, detect when we're building with clang version
25305 3.0 or lower and disable the -Wnormalized=id and -Woverride-init
25306 CFLAGS. clang doesn't support them yet.
25307 - During configure, search for library containing cos function as
25308 libm lives in libcore on some platforms (BeOS/Haiku). Linking
25309 against libm was hard-coded before. Fixes the first part of bug
25310 4727; bugfix on 0.2.2.2-alpha. Patch and analysis by Martin Hebnes
25312 - Detect attempts to build Tor on (as yet hypothetical) versions
25313 of Windows where sizeof(intptr_t) != sizeof(SOCKET). Partial
25314 fix for bug 4533. Bugfix on 0.2.2.28-beta.
25315 - Preprocessor directives should not be put inside the arguments
25316 of a macro. This would break compilation with GCC releases prior
25317 to version 3.3. We would never recommend such an old GCC version,
25318 but it is apparently required for binary compatibility on some
25319 platforms (namely, certain builds of Haiku). Fixes the other part
25320 of bug 4727; bugfix on 0.2.3.3-alpha. Patch and analysis by Martin
25323 o Minor bugfixes (other):
25324 - Older Linux kernels erroneously respond to strange nmap behavior
25325 by having accept() return successfully with a zero-length
25326 socket. When this happens, just close the connection. Previously,
25327 we would try harder to learn the remote address: but there was
25328 no such remote address to learn, and our method for trying to
25329 learn it was incorrect. Fixes bugs 1240, 4745, and 4747. Bugfix
25330 on 0.1.0.3-rc. Reported and diagnosed by "r1eo".
25331 - Fix null-pointer access that could occur if TLS allocation failed.
25332 Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un". This was
25333 erroneously listed as fixed in 0.2.3.9-alpha, but the fix had
25334 accidentally been reverted.
25335 - Fix our implementation of crypto_random_hostname() so it can't
25336 overflow on ridiculously large inputs. (No Tor version has ever
25337 provided this kind of bad inputs, but let's be correct in depth.)
25338 Fixes bug 4413; bugfix on 0.2.2.9-alpha. Fix by Stephen Palmateer.
25339 - Find more places in the code that should have been testing for
25340 invalid sockets using the SOCKET_OK macro. Required for a fix
25341 for bug 4533. Bugfix on 0.2.2.28-beta.
25342 - Fix an assertion failure when, while running with bufferevents, a
25343 connection finishes connecting after it is marked for close, but
25344 before it is closed. Fixes bug 4697; bugfix on 0.2.3.1-alpha.
25345 - test_util_spawn_background_ok() hardcoded the expected value
25346 for ENOENT to 2. This isn't portable as error numbers are
25347 platform specific, and particularly the hurd has ENOENT at
25348 0x40000002. Construct expected string at runtime, using the correct
25349 value for ENOENT. Fixes bug 4733; bugfix on 0.2.3.1-alpha.
25350 - Reject attempts to disable DisableDebuggerAttachment while Tor is
25351 running. Fixes bug 4650; bugfix on 0.2.3.9-alpha.
25352 - Use an appropriate-width type for sockets in tor-fw-helper on
25353 win64. Fixes bug 1983 at last. Bugfix on 0.2.3.9-alpha.
25356 - When sending or relaying a RELAY_EARLY cell, we used to convert
25357 it to a RELAY cell if the connection was using the v1 link
25358 protocol. This was a workaround for older versions of Tor, which
25359 didn't handle RELAY_EARLY cells properly. Now that all supported
25360 versions can handle RELAY_EARLY cells, and now that we're enforcing
25361 the "no RELAY_EXTEND commands except in RELAY_EARLY cells" rule,
25362 remove this workaround. Addresses bug 4786.
25364 o Code simplifications and refactoring:
25365 - Use OpenSSL's built-in SSL_state_string_long() instead of our
25366 own homebrewed ssl_state_to_string() replacement. Patch from
25367 Emile Snyder. Fixes bug 4653.
25368 - Use macros to indicate OpenSSL versions, so we don't need to worry
25369 about accidental hexadecimal bit shifts.
25370 - Remove some workaround code for OpenSSL 0.9.6 (which is no longer
25372 - Convert more instances of tor_snprintf+tor_strdup into tor_asprintf.
25373 - Use the smartlist_add_asprintf() alias more consistently.
25374 - Use a TOR_INVALID_SOCKET macro when initializing a socket to an
25375 invalid value, rather than just -1.
25376 - Rename a handful of old identifiers, mostly related to crypto
25377 structures and crypto functions. By convention, our "create an
25378 object" functions are called "type_new()", our "free an object"
25379 functions are called "type_free()", and our types indicate that
25380 they are types only with a final "_t". But a handful of older
25381 types and functions broke these rules, with function names like
25382 "type_create" or "subsystem_op_type", or with type names like
25386 Changes in version 0.2.3.10-alpha - 2011-12-16
25387 Tor 0.2.3.10-alpha fixes a critical heap-overflow security issue in
25388 Tor's buffers code. Absolutely everybody should upgrade.
25390 The bug relied on an incorrect calculation when making data continuous
25391 in one of our IO buffers, if the first chunk of the buffer was
25392 misaligned by just the wrong amount. The miscalculation would allow an
25393 attacker to overflow a piece of heap-allocated memory. To mount this
25394 attack, the attacker would need to either open a SOCKS connection to
25395 Tor's SocksPort (usually restricted to localhost), or target a Tor
25396 instance configured to make its connections through a SOCKS proxy
25397 (which Tor does not do by default).
25399 Good security practice requires that all heap-overflow bugs should be
25400 presumed to be exploitable until proven otherwise, so we are treating
25401 this as a potential code execution attack. Please upgrade immediately!
25402 This bug does not affect bufferevents-based builds of Tor. Special
25403 thanks to "Vektor" for reporting this issue to us!
25405 This release also contains a few minor bugfixes for issues discovered
25409 - Fix a heap overflow bug that could occur when trying to pull
25410 data into the first chunk of a buffer, when that chunk had
25411 already had some data drained from it. Fixes CVE-2011-2778;
25412 bugfix on 0.2.0.16-alpha. Reported by "Vektor".
25415 - If we can't attach streams to a rendezvous circuit when we
25416 finish connecting to a hidden service, clear the rendezvous
25417 circuit's stream-isolation state and try to attach streams
25418 again. Previously, we cleared rendezvous circuits' isolation
25419 state either too early (if they were freshly built) or not at all
25420 (if they had been built earlier and were cannibalized). Bugfix on
25421 0.2.3.3-alpha; fixes bug 4655.
25422 - Fix compilation of the libnatpmp helper on non-Windows. Bugfix on
25423 0.2.3.9-alpha; fixes bug 4691. Reported by Anthony G. Basile.
25424 - Fix an assertion failure when a relay with accounting enabled
25425 starts up while dormant. Fixes bug 4702; bugfix on 0.2.3.9-alpha.
25428 - Update to the December 6 2011 Maxmind GeoLite Country database.
25431 Changes in version 0.2.2.35 - 2011-12-16
25432 Tor 0.2.2.35 fixes a critical heap-overflow security issue in Tor's
25433 buffers code. Absolutely everybody should upgrade.
25435 The bug relied on an incorrect calculation when making data continuous
25436 in one of our IO buffers, if the first chunk of the buffer was
25437 misaligned by just the wrong amount. The miscalculation would allow an
25438 attacker to overflow a piece of heap-allocated memory. To mount this
25439 attack, the attacker would need to either open a SOCKS connection to
25440 Tor's SocksPort (usually restricted to localhost), or target a Tor
25441 instance configured to make its connections through a SOCKS proxy
25442 (which Tor does not do by default).
25444 Good security practice requires that all heap-overflow bugs should be
25445 presumed to be exploitable until proven otherwise, so we are treating
25446 this as a potential code execution attack. Please upgrade immediately!
25447 This bug does not affect bufferevents-based builds of Tor. Special
25448 thanks to "Vektor" for reporting this issue to us!
25450 Tor 0.2.2.35 also fixes several bugs in previous versions, including
25451 crash bugs for unusual configurations, and a long-term bug that
25452 would prevent Tor from starting on Windows machines with draconian
25455 With this release, we remind everyone that 0.2.0.x has reached its
25456 formal end-of-life. Those Tor versions have many known flaws, and
25457 nobody should be using them. You should upgrade -- ideally to the
25458 0.2.2.x series. If you're using a Linux or BSD and its packages are
25459 obsolete, stop using those packages and upgrade anyway.
25461 The Tor 0.2.1.x series is also approaching its end-of-life: it will no
25462 longer receive support after some time in early 2012.
25465 - Fix a heap overflow bug that could occur when trying to pull
25466 data into the first chunk of a buffer, when that chunk had
25467 already had some data drained from it. Fixes CVE-2011-2778;
25468 bugfix on 0.2.0.16-alpha. Reported by "Vektor".
25469 - Initialize Libevent with the EVENT_BASE_FLAG_NOLOCK flag enabled, so
25470 that it doesn't attempt to allocate a socketpair. This could cause
25471 some problems on Windows systems with overzealous firewalls. Fix for
25472 bug 4457; workaround for Libevent versions 2.0.1-alpha through
25474 - If we mark an OR connection for close based on a cell we process,
25475 don't process any further cells on it. We already avoid further
25476 reads on marked-for-close connections, but now we also discard the
25477 cells we'd already read. Fixes bug 4299; bugfix on 0.2.0.10-alpha,
25478 which was the first version where we might mark a connection for
25479 close based on processing a cell on it.
25480 - Correctly sanity-check that we don't underflow on a memory
25481 allocation (and then assert) for hidden service introduction
25482 point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
25483 bugfix on 0.2.1.5-alpha.
25484 - Fix a memory leak when we check whether a hidden service
25485 descriptor has any usable introduction points left. Fixes bug
25486 4424. Bugfix on 0.2.2.25-alpha.
25487 - Don't crash when we're running as a relay and don't have a GeoIP
25488 file. Bugfix on 0.2.2.34; fixes bug 4340. This backports a fix
25489 we've had in the 0.2.3.x branch already.
25490 - When running as a client, do not print a misleading (and plain
25491 wrong) log message that we're collecting "directory request"
25492 statistics: clients don't collect statistics. Also don't create a
25493 useless (because empty) stats file in the stats/ directory. Fixes
25494 bug 4353; bugfix on 0.2.2.34.
25497 - Detect failure to initialize Libevent. This fix provides better
25498 detection for future instances of bug 4457.
25499 - Avoid frequent calls to the fairly expensive cull_wedged_cpuworkers
25500 function. This was eating up hideously large amounts of time on some
25501 busy servers. Fixes bug 4518; bugfix on 0.0.9.8.
25502 - Resolve an integer overflow bug in smartlist_ensure_capacity().
25503 Fixes bug 4230; bugfix on Tor 0.1.0.1-rc. Based on a patch by
25505 - Don't warn about unused log_mutex in log.c when building with
25506 --disable-threads using a recent GCC. Fixes bug 4437; bugfix on
25507 0.1.0.6-rc which introduced --disable-threads.
25508 - When configuring, starting, or stopping an NT service, stop
25509 immediately after the service configuration attempt has succeeded
25510 or failed. Fixes bug 3963; bugfix on 0.2.0.7-alpha.
25511 - When sending a NETINFO cell, include the original address
25512 received for the other side, not its canonical address. Found
25513 by "troll_un"; fixes bug 4349; bugfix on 0.2.0.10-alpha.
25514 - Fix a typo in a hibernation-related log message. Fixes bug 4331;
25515 bugfix on 0.2.2.23-alpha; found by "tmpname0901".
25516 - Fix a memory leak in launch_direct_bridge_descriptor_fetch() that
25517 occurred when a client tried to fetch a descriptor for a bridge
25518 in ExcludeNodes. Fixes bug 4383; bugfix on 0.2.2.25-alpha.
25519 - Backport fixes for a pair of compilation warnings on Windows.
25520 Fixes bug 4521; bugfix on 0.2.2.28-beta and on 0.2.2.29-beta.
25521 - If we had ever tried to call tor_addr_to_str on an address of
25522 unknown type, we would have done a strdup on an uninitialized
25523 buffer. Now we won't. Fixes bug 4529; bugfix on 0.2.1.3-alpha.
25524 Reported by "troll_un".
25525 - Correctly detect and handle transient lookup failures from
25526 tor_addr_lookup. Fixes bug 4530; bugfix on 0.2.1.5-alpha.
25527 Reported by "troll_un".
25528 - Fix null-pointer access that could occur if TLS allocation failed.
25529 Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un".
25530 - Use tor_socket_t type for listener argument to accept(). Fixes bug
25531 4535; bugfix on 0.2.2.28-beta. Found by "troll_un".
25534 - Add two new config options for directory authorities:
25535 AuthDirFastGuarantee sets a bandwidth threshold for guaranteeing the
25536 Fast flag, and AuthDirGuardBWGuarantee sets a bandwidth threshold
25537 that is always sufficient to satisfy the bandwidth requirement for
25538 the Guard flag. Now it will be easier for researchers to simulate
25539 Tor networks with different values. Resolves ticket 4484.
25540 - When Tor ignores a hidden service specified in its configuration,
25541 include the hidden service's directory in the warning message.
25542 Previously, we would only tell the user that some hidden service
25543 was ignored. Bugfix on 0.0.6; fixes bug 4426.
25544 - Update to the December 6 2011 Maxmind GeoLite Country database.
25546 o Packaging changes:
25547 - Make it easier to automate expert package builds on Windows,
25548 by removing an absolute path from makensis.exe command.
25551 Changes in version 0.2.1.32 - 2011-12-16
25552 Tor 0.2.1.32 backports important security and privacy fixes for
25553 oldstable. This release is intended only for package maintainers and
25554 others who cannot use the 0.2.2 stable series. All others should be
25555 using Tor 0.2.2.x or newer.
25557 The Tor 0.2.1.x series will reach formal end-of-life some time in
25558 early 2012; we will stop releasing patches for it then.
25560 o Major bugfixes (also included in 0.2.2.x):
25561 - Correctly sanity-check that we don't underflow on a memory
25562 allocation (and then assert) for hidden service introduction
25563 point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
25564 bugfix on 0.2.1.5-alpha.
25565 - Fix a heap overflow bug that could occur when trying to pull
25566 data into the first chunk of a buffer, when that chunk had
25567 already had some data drained from it. Fixes CVE-2011-2778;
25568 bugfix on 0.2.0.16-alpha. Reported by "Vektor".
25571 - Update to the December 6 2011 Maxmind GeoLite Country database.
25574 Changes in version 0.2.3.9-alpha - 2011-12-08
25575 Tor 0.2.3.9-alpha introduces initial IPv6 support for bridges, adds
25576 a "DisableNetwork" security feature that bundles can use to avoid
25577 touching the network until bridges are configured, moves forward on
25578 the pluggable transport design, fixes a flaw in the hidden service
25579 design that unnecessarily prevented clients with wrong clocks from
25580 reaching hidden services, and fixes a wide variety of other issues.
25583 - Clients can now connect to private bridges over IPv6. Bridges
25584 still need at least one IPv4 address in order to connect to
25585 other relays. Note that we don't yet handle the case where the
25586 user has two bridge lines for the same bridge (one IPv4, one
25587 IPv6). Implements parts of proposal 186.
25588 - New "DisableNetwork" config option to prevent Tor from launching any
25589 connections or accepting any connections except on a control port.
25590 Bundles and controllers can set this option before letting Tor talk
25591 to the rest of the network, for example to prevent any connections
25592 to a non-bridge address. Packages like Orbot can also use this
25593 option to instruct Tor to save power when the network is off.
25594 - Clients and bridges can now be configured to use a separate
25595 "transport" proxy. This approach makes the censorship arms race
25596 easier by allowing bridges to use protocol obfuscation plugins. It
25597 implements the "managed proxy" part of proposal 180 (ticket 3472).
25598 - When using OpenSSL 1.0.0 or later, use OpenSSL's counter mode
25599 implementation. It makes AES_CTR about 7% faster than our old one
25600 (which was about 10% faster than the one OpenSSL used to provide).
25601 Resolves ticket 4526.
25602 - Add a "tor2web mode" for clients that want to connect to hidden
25603 services non-anonymously (and possibly more quickly). As a safety
25604 measure to try to keep users from turning this on without knowing
25605 what they are doing, tor2web mode must be explicitly enabled at
25606 compile time, and a copy of Tor compiled to run in tor2web mode
25607 cannot be used as a normal Tor client. Implements feature 2553.
25608 - Add experimental support for running on Windows with IOCP and no
25609 kernel-space socket buffers. This feature is controlled by a new
25610 "UserspaceIOCPBuffers" config option (off by default), which has
25611 no effect unless Tor has been built with support for bufferevents,
25612 is running on Windows, and has enabled IOCP. This may, in the long
25613 run, help solve or mitigate bug 98.
25614 - Use a more secure consensus parameter voting algorithm. Now at
25615 least three directory authorities or a majority of them must
25616 vote on a given parameter before it will be included in the
25617 consensus. Implements proposal 178.
25620 - Hidden services now ignore the timestamps on INTRODUCE2 cells.
25621 They used to check that the timestamp was within 30 minutes
25622 of their system clock, so they could cap the size of their
25623 replay-detection cache, but that approach unnecessarily refused
25624 service to clients with wrong clocks. Bugfix on 0.2.1.6-alpha, when
25625 the v3 intro-point protocol (the first one which sent a timestamp
25626 field in the INTRODUCE2 cell) was introduced; fixes bug 3460.
25627 - Only use the EVP interface when AES acceleration is enabled,
25628 to avoid a 5-7% performance regression. Resolves issue 4525;
25629 bugfix on 0.2.3.8-alpha.
25631 o Privacy/anonymity features (bridge detection):
25632 - Make bridge SSL certificates a bit more stealthy by using random
25633 serial numbers, in the same fashion as OpenSSL when generating
25634 self-signed certificates. Implements ticket 4584.
25635 - Introduce a new config option "DynamicDHGroups", enabled by
25636 default, which provides each bridge with a unique prime DH modulus
25637 to be used during SSL handshakes. This option attempts to help
25638 against censors who might use the Apache DH modulus as a static
25639 identifier for bridges. Addresses ticket 4548.
25641 o Minor features (new/different config options):
25642 - New configuration option "DisableDebuggerAttachment" (on by default)
25643 to prevent basic debugging attachment attempts by other processes.
25644 Supports Mac OS X and Gnu/Linux. Resolves ticket 3313.
25645 - Allow MapAddress directives to specify matches against super-domains,
25646 as in "MapAddress *.torproject.org *.torproject.org.torserver.exit".
25647 Implements issue 933.
25648 - Slightly change behavior of "list" options (that is, config
25649 options that can appear more than once) when they appear both in
25650 torrc and on the command line. Previously, the command-line options
25651 would be appended to the ones from torrc. Now, the command-line
25652 options override the torrc options entirely. This new behavior
25653 allows the user to override list options (like exit policies and
25654 ports to listen on) from the command line, rather than simply
25655 appending to the list.
25656 - You can get the old (appending) command-line behavior for "list"
25657 options by prefixing the option name with a "+".
25658 - You can remove all the values for a "list" option from the command
25659 line without adding any new ones by prefixing the option name
25661 - Add experimental support for a "defaults" torrc file to be parsed
25662 before the regular torrc. Torrc options override the defaults file's
25663 options in the same way that the command line overrides the torrc.
25664 The SAVECONF controller command saves only those options which
25665 differ between the current configuration and the defaults file. HUP
25666 reloads both files. (Note: This is an experimental feature; its
25667 behavior will probably be refined in future 0.2.3.x-alpha versions
25668 to better meet packagers' needs.) Implements task 4552.
25671 - Try to make the introductory warning message that Tor prints on
25672 startup more useful for actually finding help and information.
25673 Resolves ticket 2474.
25674 - Running "make version" now displays the version of Tor that
25675 we're about to build. Idea from katmagic; resolves issue 4400.
25676 - Expire old or over-used hidden service introduction points.
25677 Required by fix for bug 3460.
25678 - Move the replay-detection cache for the RSA-encrypted parts of
25679 INTRODUCE2 cells to the introduction point data structures.
25680 Previously, we would use one replay-detection cache per hidden
25681 service. Required by fix for bug 3460.
25682 - Reduce the lifetime of elements of hidden services' Diffie-Hellman
25683 public key replay-detection cache from 60 minutes to 5 minutes. This
25684 replay-detection cache is now used only to detect multiple
25685 INTRODUCE2 cells specifying the same rendezvous point, so we can
25686 avoid launching multiple simultaneous attempts to connect to it.
25688 o Minor bugfixes (on Tor 0.2.2.x and earlier):
25689 - Resolve an integer overflow bug in smartlist_ensure_capacity().
25690 Fixes bug 4230; bugfix on Tor 0.1.0.1-rc. Based on a patch by
25692 - Fix a minor formatting issue in one of tor-gencert's error messages.
25694 - Prevent a false positive from the check-spaces script, by disabling
25695 the "whitespace between function name and (" check for functions
25697 - Fix a log message suggesting that people contact a non-existent
25698 email address. Fixes bug 3448.
25699 - Fix null-pointer access that could occur if TLS allocation failed.
25700 Fixes bug 4531; bugfix on 0.2.0.20-rc. Found by "troll_un".
25701 - Report a real bootstrap problem to the controller on router
25702 identity mismatch. Previously we just said "foo", which probably
25703 made a lot of sense at the time. Fixes bug 4169; bugfix on
25705 - If we had ever tried to call tor_addr_to_str() on an address of
25706 unknown type, we would have done a strdup() on an uninitialized
25707 buffer. Now we won't. Fixes bug 4529; bugfix on 0.2.1.3-alpha.
25708 Reported by "troll_un".
25709 - Correctly detect and handle transient lookup failures from
25710 tor_addr_lookup(). Fixes bug 4530; bugfix on 0.2.1.5-alpha.
25711 Reported by "troll_un".
25712 - Use tor_socket_t type for listener argument to accept(). Fixes bug
25713 4535; bugfix on 0.2.2.28-beta. Found by "troll_un".
25714 - Initialize conn->addr to a valid state in spawn_cpuworker(). Fixes
25715 bug 4532; found by "troll_un".
25717 o Minor bugfixes (on Tor 0.2.3.x):
25718 - Fix a compile warning in tor_inet_pton(). Bugfix on 0.2.3.8-alpha;
25720 - Don't send two ESTABLISH_RENDEZVOUS cells when opening a new
25721 circuit for use as a hidden service client's rendezvous point.
25722 Fixes bugs 4641 and 4171; bugfix on 0.2.3.3-alpha. Diagnosed
25723 with help from wanoskarnet.
25724 - Restore behavior of overriding SocksPort, ORPort, and similar
25725 options from the command line. Bugfix on 0.2.3.3-alpha.
25728 - Properly handle the case where the build-tree is not the same
25729 as the source tree when generating src/common/common_sha1.i,
25730 src/or/micro-revision.i, and src/or/or_sha1.i. Fixes bug 3953;
25731 bugfix on 0.2.0.1-alpha.
25733 o Code simplifications, cleanups, and refactorings:
25734 - Remove the pure attribute from all functions that used it
25735 previously. In many cases we assigned it incorrectly, because the
25736 functions might assert or call impure functions, and we don't have
25737 evidence that keeping the pure attribute is worthwhile. Implements
25738 changes suggested in ticket 4421.
25739 - Remove some dead code spotted by coverity. Fixes cid 432.
25740 Bugfix on 0.2.3.1-alpha, closes bug 4637.
25743 Changes in version 0.2.3.8-alpha - 2011-11-22
25744 Tor 0.2.3.8-alpha fixes some crash and assert bugs, including a
25745 socketpair-related bug that has been bothering Windows users. It adds
25746 support to serve microdescriptors to controllers, so Vidalia's network
25747 map can resume listing relays (once Vidalia implements its side),
25748 and adds better support for hardware AES acceleration. Finally, it
25749 starts the process of adjusting the bandwidth cutoff for getting the
25750 "Fast" flag from 20KB to (currently) 32KB -- preliminary results show
25751 that tiny relays harm performance more than they help network capacity.
25754 - Initialize Libevent with the EVENT_BASE_FLAG_NOLOCK flag enabled, so
25755 that it doesn't attempt to allocate a socketpair. This could cause
25756 some problems on Windows systems with overzealous firewalls. Fix for
25757 bug 4457; workaround for Libevent versions 2.0.1-alpha through
25759 - Correctly sanity-check that we don't underflow on a memory
25760 allocation (and then assert) for hidden service introduction
25761 point decryption. Bug discovered by Dan Rosenberg. Fixes bug 4410;
25762 bugfix on 0.2.1.5-alpha.
25763 - Remove the artificially low cutoff of 20KB to guarantee the Fast
25764 flag. In the past few years the average relay speed has picked
25765 up, and while the "top 7/8 of the network get the Fast flag" and
25766 "all relays with 20KB or more of capacity get the Fast flag" rules
25767 used to have the same result, now the top 7/8 of the network has
25768 a capacity more like 32KB. Bugfix on 0.2.1.14-rc. Fixes bug 4489.
25769 - Fix a rare assertion failure when checking whether a v0 hidden
25770 service descriptor has any usable introduction points left, and
25771 we don't have enough information to build a circuit to the first
25772 intro point named in the descriptor. The HS client code in
25773 0.2.3.x no longer uses v0 HS descriptors, but this assertion can
25774 trigger on (and crash) v0 HS authorities. Fixes bug 4411.
25775 Bugfix on 0.2.3.1-alpha; diagnosed by frosty_un.
25776 - Make bridge authorities not crash when they are asked for their own
25777 descriptor. Bugfix on 0.2.3.7-alpha, reported by Lucky Green.
25778 - When running as a client, do not print a misleading (and plain
25779 wrong) log message that we're collecting "directory request"
25780 statistics: clients don't collect statistics. Also don't create a
25781 useless (because empty) stats file in the stats/ directory. Fixes
25782 bug 4353; bugfix on 0.2.2.34 and 0.2.3.7-alpha.
25785 - Allow Tor controllers like Vidalia to obtain the microdescriptor
25786 for a relay by identity digest or nickname. Previously,
25787 microdescriptors were only available by their own digests, so a
25788 controller would have to ask for and parse the whole microdescriptor
25789 consensus in order to look up a single relay's microdesc. Fixes
25790 bug 3832; bugfix on 0.2.3.1-alpha.
25791 - Use OpenSSL's EVP interface for AES encryption, so that all AES
25792 operations can use hardware acceleration (if present). Resolves
25795 o Minor bugfixes (on 0.2.2.x and earlier):
25796 - Detect failure to initialize Libevent. This fix provides better
25797 detection for future instances of bug 4457.
25798 - Avoid frequent calls to the fairly expensive cull_wedged_cpuworkers
25799 function. This was eating up hideously large amounts of time on some
25800 busy servers. Fixes bug 4518; bugfix on 0.0.9.8.
25801 - Don't warn about unused log_mutex in log.c when building with
25802 --disable-threads using a recent GCC. Fixes bug 4437; bugfix on
25803 0.1.0.6-rc which introduced --disable-threads.
25804 - Allow manual 'authenticate' commands to the controller interface
25805 from netcat (nc) as well as telnet. We were rejecting them because
25806 they didn't come with the expected whitespace at the end of the
25807 command. Bugfix on 0.1.1.1-alpha; fixes bug 2893.
25808 - Fix some (not actually triggerable) buffer size checks in usage of
25809 tor_inet_ntop. Fixes bug 4434; bugfix on Tor 0.2.0.1-alpha. Patch
25811 - Fix parsing of some corner-cases with tor_inet_pton(). Fixes
25812 bug 4515; bugfix on 0.2.0.1-alpha; fix by Anders Sundman.
25813 - When configuring, starting, or stopping an NT service, stop
25814 immediately after the service configuration attempt has succeeded
25815 or failed. Fixes bug 3963; bugfix on 0.2.0.7-alpha.
25816 - When sending a NETINFO cell, include the original address
25817 received for the other side, not its canonical address. Found
25818 by "troll_un"; fixes bug 4349; bugfix on 0.2.0.10-alpha.
25819 - Rename the bench_{aes,dmap} functions to test_*, so that tinytest
25820 can pick them up when the tests aren't disabled. Bugfix on
25821 0.2.2.4-alpha which introduced tinytest.
25822 - Fix a memory leak when we check whether a hidden service
25823 descriptor has any usable introduction points left. Fixes bug
25824 4424. Bugfix on 0.2.2.25-alpha.
25825 - Fix a memory leak in launch_direct_bridge_descriptor_fetch() that
25826 occurred when a client tried to fetch a descriptor for a bridge
25827 in ExcludeNodes. Fixes bug 4383; bugfix on 0.2.2.25-alpha.
25829 o Minor bugfixes (on 0.2.3.x):
25830 - Make util unit tests build correctly with MSVC. Bugfix on
25831 0.2.3.3-alpha. Patch by Gisle Vanem.
25832 - Successfully detect AUTH_CHALLENGE cells with no recognized
25833 authentication type listed. Fixes bug 4367; bugfix on 0.2.3.6-alpha.
25834 Found by frosty_un.
25835 - If a relay receives an AUTH_CHALLENGE cell it can't answer,
25836 it should still send a NETINFO cell to allow the connection to
25837 become open. Fixes bug 4368; fix on 0.2.3.6-alpha; bug found by
25839 - Log less loudly when we get an invalid authentication certificate
25840 from a source other than a directory authority: it's not unusual
25841 to see invalid certs because of clock skew. Fixes bug 4370; bugfix
25843 - Tolerate servers with more clock skew in their authentication
25844 certificates than previously. Fixes bug 4371; bugfix on
25846 - Fix a couple of compile warnings on Windows. Fixes bug 4469; bugfix
25847 on 0.2.3.4-alpha and 0.2.3.6-alpha.
25850 - Add two new config options for directory authorities:
25851 AuthDirFastGuarantee sets a bandwidth threshold for guaranteeing the
25852 Fast flag, and AuthDirGuardBWGuarantee sets a bandwidth threshold
25853 that is always sufficient to satisfy the bandwidth requirement for
25854 the Guard flag. Now it will be easier for researchers to simulate
25855 Tor networks with different values. Resolves ticket 4484.
25856 - When Tor ignores a hidden service specified in its configuration,
25857 include the hidden service's directory in the warning message.
25858 Previously, we would only tell the user that some hidden service
25859 was ignored. Bugfix on 0.0.6; fixes bug 4426.
25860 - When we fail to initialize Libevent, retry with IOCP disabled so we
25861 don't need to turn on multi-threading support in Libevent, which in
25862 turn requires a working socketpair(). This is a workaround for bug
25863 4457, which affects Libevent versions from 2.0.1-alpha through
25865 - Detect when we try to build on a platform that doesn't define
25866 AF_UNSPEC to 0. We don't work there, so refuse to compile.
25867 - Update to the November 1 2011 Maxmind GeoLite Country database.
25869 o Packaging changes:
25870 - Make it easier to automate expert package builds on Windows,
25871 by removing an absolute path from makensis.exe command.
25873 o Code simplifications and refactoring:
25874 - Remove some redundant #include directives throughout the code.
25875 Patch from Andrea Gelmini.
25876 - Unconditionally use OpenSSL's AES implementation instead of our
25877 old built-in one. OpenSSL's AES has been better for a while, and
25878 relatively few servers should still be on any version of OpenSSL
25879 that doesn't have good optimized assembly AES.
25880 - Use the name "CERTS" consistently to refer to the new cell type;
25881 we were calling it CERT in some places and CERTS in others.
25884 - Numerous new unit tests for functions in util.c and address.c by
25886 - The long-disabled benchmark tests are now split into their own
25887 ./src/test/bench binary.
25888 - The benchmark tests can now use more accurate timers than
25889 gettimeofday() when such timers are available.
25892 Changes in version 0.2.3.7-alpha - 2011-10-30
25893 Tor 0.2.3.7-alpha fixes a crash bug in 0.2.3.6-alpha introduced by
25894 the new v3 handshake. It also resolves yet another bridge address
25898 - If we mark an OR connection for close based on a cell we process,
25899 don't process any further cells on it. We already avoid further
25900 reads on marked-for-close connections, but now we also discard the
25901 cells we'd already read. Fixes bug 4299; bugfix on 0.2.0.10-alpha,
25902 which was the first version where we might mark a connection for
25903 close based on processing a cell on it.
25904 - Fix a double-free bug that would occur when we received an invalid
25905 certificate in a CERT cell in the new v3 handshake. Fixes bug 4343;
25906 bugfix on 0.2.3.6-alpha.
25907 - Bridges no longer include their address in NETINFO cells on outgoing
25908 OR connections, to allow them to blend in better with clients.
25909 Removes another avenue for enumerating bridges. Reported by
25910 "troll_un". Fixes bug 4348; bugfix on 0.2.0.10-alpha, when NETINFO
25911 cells were introduced.
25914 - Fixed a typo in a hibernation-related log message. Fixes bug 4331;
25915 bugfix on 0.2.2.23-alpha; found by "tmpname0901".
25918 Changes in version 0.2.3.6-alpha - 2011-10-26
25919 Tor 0.2.3.6-alpha includes the fix from 0.2.2.34 for a critical
25920 anonymity vulnerability where an attacker can deanonymize Tor
25921 users. Everybody should upgrade.
25923 This release also features support for a new v3 connection handshake
25924 protocol, and fixes to make hidden service connections more robust.
25927 - Implement a new handshake protocol (v3) for authenticating Tors to
25928 each other over TLS. It should be more resistant to fingerprinting
25929 than previous protocols, and should require less TLS hacking for
25930 future Tor implementations. Implements proposal 176.
25931 - Allow variable-length padding cells to disguise the length of
25932 Tor's TLS records. Implements part of proposal 184.
25934 o Privacy/anonymity fixes (clients):
25935 - Clients and bridges no longer send TLS certificate chains on
25936 outgoing OR connections. Previously, each client or bridge would
25937 use the same cert chain for all outgoing OR connections until
25938 its IP address changes, which allowed any relay that the client
25939 or bridge contacted to determine which entry guards it is using.
25940 Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
25941 - If a relay receives a CREATE_FAST cell on a TLS connection, it
25942 no longer considers that connection as suitable for satisfying a
25943 circuit EXTEND request. Now relays can protect clients from the
25944 CVE-2011-2768 issue even if the clients haven't upgraded yet.
25945 - Directory authorities no longer assign the Guard flag to relays
25946 that haven't upgraded to the above "refuse EXTEND requests
25947 to client connections" fix. Now directory authorities can
25948 protect clients from the CVE-2011-2768 issue even if neither
25949 the clients nor the relays have upgraded yet. There's a new
25950 "GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays" config option
25951 to let us transition smoothly, else tomorrow there would be no
25954 o Major bugfixes (hidden services):
25955 - Improve hidden service robustness: when an attempt to connect to
25956 a hidden service ends, be willing to refetch its hidden service
25957 descriptors from each of the HSDir relays responsible for them
25958 immediately. Previously, we would not consider refetching the
25959 service's descriptors from each HSDir for 15 minutes after the last
25960 fetch, which was inconvenient if the hidden service was not running
25961 during the first attempt. Bugfix on 0.2.0.18-alpha; fixes bug 3335.
25962 - When one of a hidden service's introduction points appears to be
25963 unreachable, stop trying it. Previously, we would keep trying
25964 to build circuits to the introduction point until we lost the
25965 descriptor, usually because the user gave up and restarted Tor.
25966 Partly fixes bug 3825.
25967 - Don't launch a useless circuit after failing to use one of a
25968 hidden service's introduction points. Previously, we would
25969 launch a new introduction circuit, but not set the hidden service
25970 which that circuit was intended to connect to, so it would never
25971 actually be used. A different piece of code would then create a
25972 new introduction circuit correctly. Bug reported by katmagic and
25973 found by Sebastian Hahn. Bugfix on 0.2.1.13-alpha; fixes bug 4212.
25975 o Major bugfixes (other):
25976 - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
25977 that they initiated. Relays could distinguish incoming bridge
25978 connections from client connections, creating another avenue for
25979 enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
25980 Found by "frosty_un".
25981 - Don't update the AccountingSoftLimitHitAt state file entry whenever
25982 tor gets started. This prevents a wrong average bandwidth
25983 estimate, which would cause relays to always start a new accounting
25984 interval at the earliest possible moment. Fixes bug 2003; bugfix
25985 on 0.2.2.7-alpha. Reported by BryonEldridge, who also helped
25986 immensely in tracking this bug down.
25987 - Fix a crash bug when changing node restrictions while a DNS lookup
25988 is in-progress. Fixes bug 4259; bugfix on 0.2.2.25-alpha. Bugfix
25991 o Minor bugfixes (on 0.2.2.x and earlier):
25992 - When a hidden service turns an extra service-side introduction
25993 circuit into a general-purpose circuit, free the rend_data and
25994 intro_key fields first, so we won't leak memory if the circuit
25995 is cannibalized for use as another service-side introduction
25996 circuit. Bugfix on 0.2.1.7-alpha; fixes bug 4251.
25997 - Rephrase the log message emitted if the TestSocks check is
25998 successful. Patch from Fabian Keil; fixes bug 4094.
25999 - Bridges now skip DNS self-tests, to act a little more stealthily.
26000 Fixes bug 4201; bugfix on 0.2.0.3-alpha, which first introduced
26001 bridges. Patch by "warms0x".
26002 - Remove a confusing dollar sign from the example fingerprint in the
26003 man page, and also make the example fingerprint a valid one. Fixes
26004 bug 4309; bugfix on 0.2.1.3-alpha.
26005 - Fix internal bug-checking logic that was supposed to catch
26006 failures in digest generation so that it will fail more robustly
26007 if we ask for a nonexistent algorithm. Found by Coverity Scan.
26008 Bugfix on 0.2.2.1-alpha; fixes Coverity CID 479.
26009 - Report any failure in init_keys() calls launched because our
26010 IP address has changed. Spotted by Coverity Scan. Bugfix on
26011 0.1.1.4-alpha; fixes CID 484.
26013 o Minor bugfixes (on 0.2.3.x):
26014 - Fix a bug in configure.in that kept it from building a configure
26015 script with autoconf versions earlier than 2.61. Fixes bug 2430;
26016 bugfix on 0.2.3.1-alpha.
26017 - Don't warn users that they are exposing a client port to the
26018 Internet if they have specified an RFC1918 address. Previously,
26019 we would warn if the user had specified any non-loopback
26020 address. Bugfix on 0.2.3.3-alpha. Fixes bug 4018; reported by Tas.
26021 - Fix memory leaks in the failing cases of the new SocksPort and
26022 ControlPort code. Found by Coverity Scan. Bugfix on 0.2.3.3-alpha;
26023 fixes coverity CIDs 485, 486, and 487.
26026 - When a hidden service's introduction point times out, consider
26027 trying it again during the next attempt to connect to the
26028 HS. Previously, we would not try it again unless a newly fetched
26029 descriptor contained it. Required by fixes for bugs 1297 and 3825.
26030 - The next version of Windows will be called Windows 8, and it has
26031 a major version of 6, minor version of 2. Correctly identify that
26032 version instead of calling it "Very recent version". Resolves
26033 ticket 4153; reported by funkstar.
26034 - The Bridge Authority now writes statistics on how many bridge
26035 descriptors it gave out in total, and how many unique descriptors
26036 it gave out. It also lists how often the most and least commonly
26037 fetched descriptors were given out, as well as the median and
26038 25th/75th percentile. Implements tickets 4200 and 4294.
26039 - Update to the October 4 2011 Maxmind GeoLite Country database.
26041 o Code simplifications and refactoring:
26042 - Remove some old code to remember statistics about which descriptors
26043 we've served as a directory mirror. The feature wasn't used and
26044 is outdated now that microdescriptors are around.
26045 - Rename Tor functions that turn strings into addresses, so that
26046 "parse" indicates that no hostname resolution occurs, and
26047 "lookup" indicates that hostname resolution may occur. This
26048 should help prevent mistakes in the future. Fixes bug 3512.
26051 Changes in version 0.2.2.34 - 2011-10-26
26052 Tor 0.2.2.34 fixes a critical anonymity vulnerability where an attacker
26053 can deanonymize Tor users. Everybody should upgrade.
26055 The attack relies on four components: 1) Clients reuse their TLS cert
26056 when talking to different relays, so relays can recognize a user by
26057 the identity key in her cert. 2) An attacker who knows the client's
26058 identity key can probe each guard relay to see if that identity key
26059 is connected to that guard relay right now. 3) A variety of active
26060 attacks in the literature (starting from "Low-Cost Traffic Analysis
26061 of Tor" by Murdoch and Danezis in 2005) allow a malicious website to
26062 discover the guard relays that a Tor user visiting the website is using.
26063 4) Clients typically pick three guards at random, so the set of guards
26064 for a given user could well be a unique fingerprint for her. This
26065 release fixes components #1 and #2, which is enough to block the attack;
26066 the other two remain as open research problems. Special thanks to
26067 "frosty_un" for reporting the issue to us!
26069 Clients should upgrade so they are no longer recognizable by the TLS
26070 certs they present. Relays should upgrade so they no longer allow a
26071 remote attacker to probe them to test whether unpatched clients are
26072 currently connected to them.
26074 This release also fixes several vulnerabilities that allow an attacker
26075 to enumerate bridge relays. Some bridge enumeration attacks still
26076 remain; see for example proposal 188.
26078 o Privacy/anonymity fixes (clients):
26079 - Clients and bridges no longer send TLS certificate chains on
26080 outgoing OR connections. Previously, each client or bridge would
26081 use the same cert chain for all outgoing OR connections until
26082 its IP address changes, which allowed any relay that the client
26083 or bridge contacted to determine which entry guards it is using.
26084 Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
26085 - If a relay receives a CREATE_FAST cell on a TLS connection, it
26086 no longer considers that connection as suitable for satisfying a
26087 circuit EXTEND request. Now relays can protect clients from the
26088 CVE-2011-2768 issue even if the clients haven't upgraded yet.
26089 - Directory authorities no longer assign the Guard flag to relays
26090 that haven't upgraded to the above "refuse EXTEND requests
26091 to client connections" fix. Now directory authorities can
26092 protect clients from the CVE-2011-2768 issue even if neither
26093 the clients nor the relays have upgraded yet. There's a new
26094 "GiveGuardFlagTo_CVE_2011_2768_VulnerableRelays" config option
26095 to let us transition smoothly, else tomorrow there would be no
26098 o Privacy/anonymity fixes (bridge enumeration):
26099 - Bridge relays now do their directory fetches inside Tor TLS
26100 connections, like all the other clients do, rather than connecting
26101 directly to the DirPort like public relays do. Removes another
26102 avenue for enumerating bridges. Fixes bug 4115; bugfix on 0.2.0.35.
26103 - Bridges relays now build circuits for themselves in a more similar
26104 way to how clients build them. Removes another avenue for
26105 enumerating bridges. Fixes bug 4124; bugfix on 0.2.0.3-alpha,
26106 when bridges were introduced.
26107 - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
26108 that they initiated. Relays could distinguish incoming bridge
26109 connections from client connections, creating another avenue for
26110 enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
26111 Found by "frosty_un".
26114 - Fix a crash bug when changing node restrictions while a DNS lookup
26115 is in-progress. Fixes bug 4259; bugfix on 0.2.2.25-alpha. Bugfix
26117 - Don't launch a useless circuit after failing to use one of a
26118 hidden service's introduction points. Previously, we would
26119 launch a new introduction circuit, but not set the hidden service
26120 which that circuit was intended to connect to, so it would never
26121 actually be used. A different piece of code would then create a
26122 new introduction circuit correctly. Bug reported by katmagic and
26123 found by Sebastian Hahn. Bugfix on 0.2.1.13-alpha; fixes bug 4212.
26126 - Change an integer overflow check in the OpenBSD_Malloc code so
26127 that GCC is less likely to eliminate it as impossible. Patch
26128 from Mansour Moufid. Fixes bug 4059.
26129 - When a hidden service turns an extra service-side introduction
26130 circuit into a general-purpose circuit, free the rend_data and
26131 intro_key fields first, so we won't leak memory if the circuit
26132 is cannibalized for use as another service-side introduction
26133 circuit. Bugfix on 0.2.1.7-alpha; fixes bug 4251.
26134 - Bridges now skip DNS self-tests, to act a little more stealthily.
26135 Fixes bug 4201; bugfix on 0.2.0.3-alpha, which first introduced
26136 bridges. Patch by "warms0x".
26137 - Fix internal bug-checking logic that was supposed to catch
26138 failures in digest generation so that it will fail more robustly
26139 if we ask for a nonexistent algorithm. Found by Coverity Scan.
26140 Bugfix on 0.2.2.1-alpha; fixes Coverity CID 479.
26141 - Report any failure in init_keys() calls launched because our
26142 IP address has changed. Spotted by Coverity Scan. Bugfix on
26143 0.1.1.4-alpha; fixes CID 484.
26145 o Minor bugfixes (log messages and documentation):
26146 - Remove a confusing dollar sign from the example fingerprint in the
26147 man page, and also make the example fingerprint a valid one. Fixes
26148 bug 4309; bugfix on 0.2.1.3-alpha.
26149 - The next version of Windows will be called Windows 8, and it has
26150 a major version of 6, minor version of 2. Correctly identify that
26151 version instead of calling it "Very recent version". Resolves
26152 ticket 4153; reported by funkstar.
26153 - Downgrade log messages about circuit timeout calibration from
26154 "notice" to "info": they don't require or suggest any human
26155 intervention. Patch from Tom Lowenthal. Fixes bug 4063;
26156 bugfix on 0.2.2.14-alpha.
26159 - Turn on directory request statistics by default and include them in
26160 extra-info descriptors. Don't break if we have no GeoIP database.
26161 Backported from 0.2.3.1-alpha; implements ticket 3951.
26162 - Update to the October 4 2011 Maxmind GeoLite Country database.
26165 Changes in version 0.2.1.31 - 2011-10-26
26166 Tor 0.2.1.31 backports important security and privacy fixes for
26167 oldstable. This release is intended only for package maintainers and
26168 others who cannot use the 0.2.2 stable series. All others should be
26169 using Tor 0.2.2.x or newer.
26171 o Security fixes (also included in 0.2.2.x):
26172 - Replace all potentially sensitive memory comparison operations
26173 with versions whose runtime does not depend on the data being
26174 compared. This will help resist a class of attacks where an
26175 adversary can use variations in timing information to learn
26176 sensitive data. Fix for one case of bug 3122. (Safe memcmp
26177 implementation by Robert Ransom based partially on code by DJB.)
26178 - Fix an assert in parsing router descriptors containing IPv6
26179 addresses. This one took down the directory authorities when
26180 somebody tried some experimental code. Bugfix on 0.2.1.3-alpha.
26182 o Privacy/anonymity fixes (also included in 0.2.2.x):
26183 - Clients and bridges no longer send TLS certificate chains on
26184 outgoing OR connections. Previously, each client or bridge would
26185 use the same cert chain for all outgoing OR connections until
26186 its IP address changes, which allowed any relay that the client
26187 or bridge contacted to determine which entry guards it is using.
26188 Fixes CVE-2011-2768. Bugfix on 0.0.9pre5; found by "frosty_un".
26189 - If a relay receives a CREATE_FAST cell on a TLS connection, it
26190 no longer considers that connection as suitable for satisfying a
26191 circuit EXTEND request. Now relays can protect clients from the
26192 CVE-2011-2768 issue even if the clients haven't upgraded yet.
26193 - Bridges now refuse CREATE or CREATE_FAST cells on OR connections
26194 that they initiated. Relays could distinguish incoming bridge
26195 connections from client connections, creating another avenue for
26196 enumerating bridges. Fixes CVE-2011-2769. Bugfix on 0.2.0.3-alpha.
26197 Found by "frosty_un".
26198 - When receiving a hidden service descriptor, check that it is for
26199 the hidden service we wanted. Previously, Tor would store any
26200 hidden service descriptors that a directory gave it, whether it
26201 wanted them or not. This wouldn't have let an attacker impersonate
26202 a hidden service, but it did let directories pre-seed a client
26203 with descriptors that it didn't want. Bugfix on 0.0.6.
26204 - Avoid linkability based on cached hidden service descriptors: forget
26205 all hidden service descriptors cached as a client when processing a
26206 SIGNAL NEWNYM command. Fixes bug 3000; bugfix on 0.0.6.
26207 - Make the bridge directory authority refuse to answer directory
26208 requests for "all" descriptors. It used to include bridge
26209 descriptors in its answer, which was a major information leak.
26210 Found by "piebeer". Bugfix on 0.2.0.3-alpha.
26211 - Don't attach new streams to old rendezvous circuits after SIGNAL
26212 NEWNYM. Previously, we would keep using an existing rendezvous
26213 circuit if it remained open (i.e. if it were kept open by a
26214 long-lived stream, or if a new stream were attached to it before
26215 Tor could notice that it was old and no longer in use). Bugfix on
26216 0.1.1.15-rc; fixes bug 3375.
26218 o Minor bugfixes (also included in 0.2.2.x):
26219 - When we restart our relay, we might get a successful connection
26220 from the outside before we've started our reachability tests,
26221 triggering a warning: "ORPort found reachable, but I have no
26222 routerinfo yet. Failing to inform controller of success." This
26223 bug was harmless unless Tor is running under a controller
26224 like Vidalia, in which case the controller would never get a
26225 REACHABILITY_SUCCEEDED status event. Bugfix on 0.1.2.6-alpha;
26227 - Build correctly on OSX with zlib 1.2.4 and higher with all warnings
26228 enabled. Fixes bug 1526.
26229 - Remove undocumented option "-F" from tor-resolve: it hasn't done
26230 anything since 0.2.1.16-rc.
26231 - Avoid signed/unsigned comparisons by making SIZE_T_CEILING unsigned.
26232 None of the cases where we did this before were wrong, but by making
26233 this change we avoid warnings. Fixes bug 2475; bugfix on 0.2.1.28.
26234 - Fix a rare crash bug that could occur when a client was configured
26235 with a large number of bridges. Fixes bug 2629; bugfix on
26236 0.2.1.2-alpha. Bugfix by trac user "shitlei".
26237 - Correct the warning displayed when a rendezvous descriptor exceeds
26238 the maximum size. Fixes bug 2750; bugfix on 0.2.1.5-alpha. Found by
26240 - Fix an uncommon assertion failure when running with DNSPort under
26241 heavy load. Fixes bug 2933; bugfix on 0.2.0.1-alpha.
26242 - When warning about missing zlib development packages during compile,
26243 give the correct package names. Bugfix on 0.2.0.1-alpha.
26244 - Require that introduction point keys and onion keys have public
26245 exponent 65537. Bugfix on 0.2.0.10-alpha.
26246 - Do not crash when our configuration file becomes unreadable, for
26247 example due to a permissions change, between when we start up
26248 and when a controller calls SAVECONF. Fixes bug 3135; bugfix
26250 - Fix warnings from GCC 4.6's "-Wunused-but-set-variable" option.
26252 - Always NUL-terminate the sun_path field of a sockaddr_un before
26253 passing it to the kernel. (Not a security issue: kernels are
26254 smart enough to reject bad sockaddr_uns.) Found by Coverity;
26255 CID #428. Bugfix on Tor 0.2.0.3-alpha.
26256 - Don't stack-allocate the list of supplementary GIDs when we're
26257 about to log them. Stack-allocating NGROUPS_MAX gid_t elements
26258 could take up to 256K, which is way too much stack. Found by
26259 Coverity; CID #450. Bugfix on 0.2.1.7-alpha.
26261 o Minor bugfixes (only in 0.2.1.x):
26262 - Resume using micro-version numbers in 0.2.1.x: our Debian packages
26263 rely on them. Bugfix on 0.2.1.30.
26264 - Use git revisions instead of svn revisions when generating our
26265 micro-version numbers. Bugfix on 0.2.1.15-rc; fixes bug 2402.
26267 o Minor features (also included in 0.2.2.x):
26268 - Adjust the expiration time on our SSL session certificates to
26269 better match SSL certs seen in the wild. Resolves ticket 4014.
26270 - Allow nameservers with IPv6 address. Resolves bug 2574.
26271 - Update to the October 4 2011 Maxmind GeoLite Country database.
26274 Changes in version 0.2.3.5-alpha - 2011-09-28
26275 Tor 0.2.3.5-alpha fixes two bugs that make it possible to enumerate
26276 bridge relays; fixes an assertion error that many users started hitting
26277 today; and adds the ability to refill token buckets more often than
26278 once per second, allowing significant performance improvements.
26281 - Bridge relays now do their directory fetches inside Tor TLS
26282 connections, like all the other clients do, rather than connecting
26283 directly to the DirPort like public relays do. Removes another
26284 avenue for enumerating bridges. Fixes bug 4115; bugfix on 0.2.0.35.
26285 - Bridges relays now build circuits for themselves in a more similar
26286 way to how clients build them. Removes another avenue for
26287 enumerating bridges. Fixes bug 4124; bugfix on 0.2.0.3-alpha,
26288 when bridges were introduced.
26291 - Fix an "Assertion md->held_by_node == 1 failed" error that could
26292 occur when the same microdescriptor was referenced by two node_t
26293 objects at once. Fix for bug 4118; bugfix on Tor 0.2.3.1-alpha.
26295 o Major features (networking):
26296 - Add a new TokenBucketRefillInterval option to refill token buckets
26297 more frequently than once per second. This should improve network
26298 performance, alleviate queueing problems, and make traffic less
26299 bursty. Implements proposal 183; closes ticket 3630. Design by
26300 Florian Tschorsch and Björn Scheuermann; implementation by
26304 - Change an integer overflow check in the OpenBSD_Malloc code so
26305 that GCC is less likely to eliminate it as impossible. Patch
26306 from Mansour Moufid. Fixes bug 4059.
26308 o Minor bugfixes (usability):
26309 - Downgrade log messages about circuit timeout calibration from
26310 "notice" to "info": they don't require or suggest any human
26311 intervention. Patch from Tom Lowenthal. Fixes bug 4063;
26312 bugfix on 0.2.2.14-alpha.
26314 o Minor features (diagnostics):
26315 - When the system call to create a listener socket fails, log the
26316 error message explaining why. This may help diagnose bug 4027.
26319 Changes in version 0.2.3.4-alpha - 2011-09-13
26320 Tor 0.2.3.4-alpha includes the fixes from 0.2.2.33, including a slight
26321 tweak to Tor's TLS handshake that makes relays and bridges that run
26322 this new version reachable from Iran again. It also fixes a few new
26323 bugs in 0.2.3.x, and teaches relays to recognize when they're not
26324 listed in the network consensus and republish.
26326 o Major bugfixes (also part of 0.2.2.33):
26327 - Avoid an assertion failure when reloading a configuration with
26328 TrackExitHosts changes. Found and fixed by 'laruldan'. Fixes bug
26329 3923; bugfix on 0.2.2.25-alpha.
26331 o Minor features (security, also part of 0.2.2.33):
26332 - Check for replays of the public-key encrypted portion of an
26333 INTRODUCE1 cell, in addition to the current check for replays of
26334 the g^x value. This prevents a possible class of active attacks
26335 by an attacker who controls both an introduction point and a
26336 rendezvous point, and who uses the malleability of AES-CTR to
26337 alter the encrypted g^x portion of the INTRODUCE1 cell. We think
26338 that these attacks are infeasible (requiring the attacker to send
26339 on the order of zettabytes of altered cells in a short interval),
26340 but we'd rather block them off in case there are any classes of
26341 this attack that we missed. Reported by Willem Pinckaers.
26343 o Minor features (also part of 0.2.2.33):
26344 - Adjust the expiration time on our SSL session certificates to
26345 better match SSL certs seen in the wild. Resolves ticket 4014.
26346 - Change the default required uptime for a relay to be accepted as
26347 a HSDir (hidden service directory) from 24 hours to 25 hours.
26348 Improves on 0.2.0.10-alpha; resolves ticket 2649.
26349 - Add a VoteOnHidServDirectoriesV2 config option to allow directory
26350 authorities to abstain from voting on assignment of the HSDir
26351 consensus flag. Related to bug 2649.
26352 - Update to the September 6 2011 Maxmind GeoLite Country database.
26354 o Minor bugfixes (also part of 0.2.2.33):
26355 - Demote the 'replay detected' log message emitted when a hidden
26356 service receives the same Diffie-Hellman public key in two different
26357 INTRODUCE2 cells to info level. A normal Tor client can cause that
26358 log message during its normal operation. Bugfix on 0.2.1.6-alpha;
26359 fixes part of bug 2442.
26360 - Demote the 'INTRODUCE2 cell is too {old,new}' log message to info
26361 level. There is nothing that a hidden service's operator can do
26362 to fix its clients' clocks. Bugfix on 0.2.1.6-alpha; fixes part
26364 - Clarify a log message specifying the characters permitted in
26365 HiddenServiceAuthorizeClient client names. Previously, the log
26366 message said that "[A-Za-z0-9+-_]" were permitted; that could have
26367 given the impression that every ASCII character between "+" and "_"
26368 was permitted. Now we say "[A-Za-z0-9+_-]". Bugfix on 0.2.1.5-alpha.
26370 o Build fixes (also part of 0.2.2.33):
26371 - Clean up some code issues that prevented Tor from building on older
26372 BSDs. Fixes bug 3894; reported by "grarpamp".
26373 - Search for a platform-specific version of "ar" when cross-compiling.
26374 Should fix builds on iOS. Resolves bug 3909, found by Marco Bonetti.
26377 - Fix a bug where the SocksPort option (for example) would get
26378 ignored and replaced by the default if a SocksListenAddress
26379 option was set. Bugfix on 0.2.3.3-alpha; fixes bug 3936. Fix by
26383 - Relays now try regenerating and uploading their descriptor more
26384 frequently if they are not listed in the consensus, or if the
26385 version of their descriptor listed in the consensus is too
26386 old. This fix should prevent situations where a server declines
26387 to re-publish itself because it has done so too recently, even
26388 though the authorities decided not to list its recent-enough
26389 descriptor. Fix for bug 3327.
26392 - Relays now include a reason for regenerating their descriptors
26393 in an HTTP header when uploading to the authorities. This will
26394 make it easier to debug descriptor-upload issues in the future.
26395 - When starting as root and then changing our UID via the User
26396 control option, and we have a ControlSocket configured, make sure
26397 that the ControlSocket is owned by the same account that Tor will
26398 run under. Implements ticket 3421; fix by Jérémy Bobbio.
26401 - Abort if tor_vasprintf fails in connection_printf_to_buf (a
26402 utility function used in the control-port code). This shouldn't
26403 ever happen unless Tor is completely out of memory, but if it did
26404 happen and Tor somehow recovered from it, Tor could have sent a log
26405 message to a control port in the middle of a reply to a controller
26406 command. Fixes part of bug 3428; bugfix on 0.1.2.3-alpha.
26407 - Make 'FetchUselessDescriptors' cause all descriptor types and
26408 all consensus types (including microdescriptors) to get fetched.
26409 Fixes bug 3851; bugfix on 0.2.3.1-alpha.
26411 o Code refactoring:
26412 - Make a new "entry connection" struct as an internal subtype of "edge
26413 connection", to simplify the code and make exit connections smaller.
26416 Changes in version 0.2.2.33 - 2011-09-13
26417 Tor 0.2.2.33 fixes several bugs, and includes a slight tweak to Tor's
26418 TLS handshake that makes relays and bridges that run this new version
26419 reachable from Iran again.
26422 - Avoid an assertion failure when reloading a configuration with
26423 TrackExitHosts changes. Found and fixed by 'laruldan'. Fixes bug
26424 3923; bugfix on 0.2.2.25-alpha.
26426 o Minor features (security):
26427 - Check for replays of the public-key encrypted portion of an
26428 INTRODUCE1 cell, in addition to the current check for replays of
26429 the g^x value. This prevents a possible class of active attacks
26430 by an attacker who controls both an introduction point and a
26431 rendezvous point, and who uses the malleability of AES-CTR to
26432 alter the encrypted g^x portion of the INTRODUCE1 cell. We think
26433 that these attacks are infeasible (requiring the attacker to send
26434 on the order of zettabytes of altered cells in a short interval),
26435 but we'd rather block them off in case there are any classes of
26436 this attack that we missed. Reported by Willem Pinckaers.
26439 - Adjust the expiration time on our SSL session certificates to
26440 better match SSL certs seen in the wild. Resolves ticket 4014.
26441 - Change the default required uptime for a relay to be accepted as
26442 a HSDir (hidden service directory) from 24 hours to 25 hours.
26443 Improves on 0.2.0.10-alpha; resolves ticket 2649.
26444 - Add a VoteOnHidServDirectoriesV2 config option to allow directory
26445 authorities to abstain from voting on assignment of the HSDir
26446 consensus flag. Related to bug 2649.
26447 - Update to the September 6 2011 Maxmind GeoLite Country database.
26449 o Minor bugfixes (documentation and log messages):
26450 - Correct the man page to explain that HashedControlPassword and
26451 CookieAuthentication can both be set, in which case either method
26452 is sufficient to authenticate to Tor. Bugfix on 0.2.0.7-alpha,
26453 when we decided to allow these config options to both be set. Issue
26454 raised by bug 3898.
26455 - Demote the 'replay detected' log message emitted when a hidden
26456 service receives the same Diffie-Hellman public key in two different
26457 INTRODUCE2 cells to info level. A normal Tor client can cause that
26458 log message during its normal operation. Bugfix on 0.2.1.6-alpha;
26459 fixes part of bug 2442.
26460 - Demote the 'INTRODUCE2 cell is too {old,new}' log message to info
26461 level. There is nothing that a hidden service's operator can do
26462 to fix its clients' clocks. Bugfix on 0.2.1.6-alpha; fixes part
26464 - Clarify a log message specifying the characters permitted in
26465 HiddenServiceAuthorizeClient client names. Previously, the log
26466 message said that "[A-Za-z0-9+-_]" were permitted; that could have
26467 given the impression that every ASCII character between "+" and "_"
26468 was permitted. Now we say "[A-Za-z0-9+_-]". Bugfix on 0.2.1.5-alpha.
26471 - Provide a substitute implementation of lround() for MSVC, which
26472 apparently lacks it. Patch from Gisle Vanem.
26473 - Clean up some code issues that prevented Tor from building on older
26474 BSDs. Fixes bug 3894; reported by "grarpamp".
26475 - Search for a platform-specific version of "ar" when cross-compiling.
26476 Should fix builds on iOS. Resolves bug 3909, found by Marco Bonetti.
26479 Changes in version 0.2.3.3-alpha - 2011-09-01
26480 Tor 0.2.3.3-alpha adds a new "stream isolation" feature to improve Tor's
26481 security, and provides client-side support for the microdescriptor
26482 and optimistic data features introduced earlier in the 0.2.3.x
26483 series. It also includes numerous critical bugfixes in the (optional)
26484 bufferevent-based networking backend.
26486 o Major features (stream isolation):
26487 - You can now configure Tor so that streams from different
26488 applications are isolated on different circuits, to prevent an
26489 attacker who sees your streams as they leave an exit node from
26490 linking your sessions to one another. To do this, choose some way
26491 to distinguish the applications: have them connect to different
26492 SocksPorts, or have one of them use SOCKS4 while the other uses
26493 SOCKS5, or have them pass different authentication strings to the
26494 SOCKS proxy. Then, use the new SocksPort syntax to configure the
26495 degree of isolation you need. This implements Proposal 171.
26496 - There's a new syntax for specifying multiple client ports (such as
26497 SOCKSPort, TransPort, DNSPort, NATDPort): you can now just declare
26498 multiple *Port entries with full addr:port syntax on each.
26499 The old *ListenAddress format is still supported, but you can't
26500 mix it with the new *Port syntax.
26502 o Major features (other):
26503 - Enable microdescriptor fetching by default for clients. This allows
26504 clients to download a much smaller amount of directory information.
26505 To disable it (and go back to the old-style consensus and
26506 descriptors), set "UseMicrodescriptors 0" in your torrc file.
26507 - Tor's firewall-helper feature, introduced in 0.2.3.1-alpha (see the
26508 "PortForwarding" config option), now supports Windows.
26509 - When using an exit relay running 0.2.3.x, clients can now
26510 "optimistically" send data before the exit relay reports that
26511 the stream has opened. This saves a round trip when starting
26512 connections where the client speaks first (such as web browsing).
26513 This behavior is controlled by a consensus parameter (currently
26514 disabled). To turn it on or off manually, use the "OptimisticData"
26515 torrc option. Implements proposal 181; code by Ian Goldberg.
26517 o Major bugfixes (bufferevents, fixes on 0.2.3.1-alpha):
26518 - When using IOCP on Windows, we need to enable Libevent windows
26520 - The IOCP backend now works even when the user has not specified
26521 the (internal, debugging-only) _UseFilteringSSLBufferevents option.
26522 Fixes part of bug 3752.
26523 - Correctly record the bytes we've read and written when using
26524 bufferevents, so that we can include them in our bandwidth history
26525 and advertised bandwidth. Fixes bug 3803.
26526 - Apply rate-limiting only at the bottom of a chain of filtering
26527 bufferevents. This prevents us from filling up internal read
26528 buffers and violating rate-limits when filtering bufferevents
26529 are enabled. Fixes part of bug 3804.
26530 - Add high-watermarks to the output buffers for filtered
26531 bufferevents. This prevents us from filling up internal write
26532 buffers and wasting CPU cycles when filtering bufferevents are
26533 enabled. Fixes part of bug 3804.
26534 - Correctly notice when data has been written from a bufferevent
26535 without flushing it completely. Fixes bug 3805.
26536 - Fix a bug where server-side tunneled bufferevent-based directory
26537 streams would get closed prematurely. Fixes bug 3814.
26538 - Fix a use-after-free error with per-connection rate-limiting
26539 buckets. Fixes bug 3888.
26541 o Major bugfixes (also part of 0.2.2.31-rc):
26542 - If we're configured to write our ControlPorts to disk, only write
26543 them after switching UID and creating the data directory. This way,
26544 we don't fail when starting up with a nonexistent DataDirectory
26545 and a ControlPortWriteToFile setting based on that directory. Fixes
26546 bug 3747; bugfix on Tor 0.2.2.26-beta.
26549 - Added a new CONF_CHANGED event so that controllers can be notified
26550 of any configuration changes made by other controllers, or by the
26551 user. Implements ticket 1692.
26552 - Use evbuffer_copyout() in inspect_evbuffer(). This fixes a memory
26553 leak when using bufferevents, and lets Libevent worry about how to
26554 best copy data out of a buffer.
26555 - Replace files in stats/ rather than appending to them. Now that we
26556 include statistics in extra-info descriptors, it makes no sense to
26557 keep old statistics forever. Implements ticket 2930.
26559 o Minor features (build compatibility):
26560 - Limited, experimental support for building with nmake and MSVC.
26561 - Provide a substitute implementation of lround() for MSVC, which
26562 apparently lacks it. Patch from Gisle Vanem.
26564 o Minor features (also part of 0.2.2.31-rc):
26565 - Update to the August 2 2011 Maxmind GeoLite Country database.
26567 o Minor bugfixes (on 0.2.3.x-alpha):
26568 - Fix a spurious warning when parsing SOCKS requests with
26569 bufferevents enabled. Fixes bug 3615; bugfix on 0.2.3.2-alpha.
26570 - Get rid of a harmless warning that could happen on relays running
26571 with bufferevents. The warning was caused by someone doing an http
26572 request to a relay's orport. Also don't warn for a few related
26573 non-errors. Fixes bug 3700; bugfix on 0.2.3.1-alpha.
26575 o Minor bugfixes (on 2.2.x and earlier):
26576 - Correct the man page to explain that HashedControlPassword and
26577 CookieAuthentication can both be set, in which case either method
26578 is sufficient to authenticate to Tor. Bugfix on 0.2.0.7-alpha,
26579 when we decided to allow these config options to both be set. Issue
26580 raised by bug 3898.
26581 - The "--quiet" and "--hush" options now apply not only to Tor's
26582 behavior before logs are configured, but also to Tor's behavior in
26583 the absence of configured logs. Fixes bug 3550; bugfix on
26586 o Minor bugfixes (also part of 0.2.2.31-rc):
26587 - Write several files in text mode, on OSes that distinguish text
26588 mode from binary mode (namely, Windows). These files are:
26589 'buffer-stats', 'dirreq-stats', and 'entry-stats' on relays
26590 that collect those statistics; 'client_keys' and 'hostname' for
26591 hidden services that use authentication; and (in the tor-gencert
26592 utility) newly generated identity and signing keys. Previously,
26593 we wouldn't specify text mode or binary mode, leading to an
26594 assertion failure. Fixes bug 3607. Bugfix on 0.2.1.1-alpha (when
26595 the DirRecordUsageByCountry option which would have triggered
26596 the assertion failure was added), although this assertion failure
26597 would have occurred in tor-gencert on Windows in 0.2.0.1-alpha.
26598 - Selectively disable deprecation warnings on OS X because Lion
26599 started deprecating the shipped copy of openssl. Fixes bug 3643.
26600 - Remove an extra pair of quotation marks around the error
26601 message in control-port STATUS_GENERAL BUG events. Bugfix on
26602 0.1.2.6-alpha; fixes bug 3732.
26603 - When unable to format an address as a string, report its value
26604 as "???" rather than reusing the last formatted address. Bugfix
26607 o Code simplifications and refactoring:
26608 - Rewrite the listener-selection logic so that parsing which ports
26609 we want to listen on is now separate from binding to the ports
26613 - Building Tor with bufferevent support now requires Libevent
26614 2.0.13-stable or later. Previous versions of Libevent had bugs in
26615 SSL-related bufferevents and related issues that would make Tor
26616 work badly with bufferevents. Requiring 2.0.13-stable also allows
26617 Tor with bufferevents to take advantage of Libevent APIs
26618 introduced after 2.0.8-rc.
26621 Changes in version 0.2.2.32 - 2011-08-27
26622 The Tor 0.2.2 release series is dedicated to the memory of Andreas
26623 Pfitzmann (1958-2010), a pioneer in anonymity and privacy research,
26624 a founder of the PETS community, a leader in our field, a mentor,
26625 and a friend. He left us with these words: "I had the possibility
26626 to contribute to this world that is not as it should be. I hope I
26627 could help in some areas to make the world a better place, and that
26628 I could also encourage other people to be engaged in improving the
26629 world. Please, stay engaged. This world needs you, your love, your
26630 initiative -- now I cannot be part of that anymore."
26632 Tor 0.2.2.32, the first stable release in the 0.2.2 branch, is finally
26633 ready. More than two years in the making, this release features improved
26634 client performance and hidden service reliability, better compatibility
26635 for Android, correct behavior for bridges that listen on more than
26636 one address, more extensible and flexible directory object handling,
26637 better reporting of network statistics, improved code security, and
26638 many many other features and bugfixes.
26641 Changes in version 0.2.2.31-rc - 2011-08-17
26642 Tor 0.2.2.31-rc is the second and hopefully final release candidate
26643 for the Tor 0.2.2.x series.
26646 - Remove an extra pair of quotation marks around the error
26647 message in control-port STATUS_GENERAL BUG events. Bugfix on
26648 0.1.2.6-alpha; fixes bug 3732.
26649 - If we're configured to write our ControlPorts to disk, only write
26650 them after switching UID and creating the data directory. This way,
26651 we don't fail when starting up with a nonexistent DataDirectory
26652 and a ControlPortWriteToFile setting based on that directory. Fixes
26653 bug 3747; bugfix on Tor 0.2.2.26-beta.
26656 - Update to the August 2 2011 Maxmind GeoLite Country database.
26659 - Allow GETINFO fingerprint to return a fingerprint even when
26660 we have not yet built a router descriptor. Fixes bug 3577;
26661 bugfix on 0.2.0.1-alpha.
26662 - Write several files in text mode, on OSes that distinguish text
26663 mode from binary mode (namely, Windows). These files are:
26664 'buffer-stats', 'dirreq-stats', and 'entry-stats' on relays
26665 that collect those statistics; 'client_keys' and 'hostname' for
26666 hidden services that use authentication; and (in the tor-gencert
26667 utility) newly generated identity and signing keys. Previously,
26668 we wouldn't specify text mode or binary mode, leading to an
26669 assertion failure. Fixes bug 3607. Bugfix on 0.2.1.1-alpha (when
26670 the DirRecordUsageByCountry option which would have triggered
26671 the assertion failure was added), although this assertion failure
26672 would have occurred in tor-gencert on Windows in 0.2.0.1-alpha.
26673 - Selectively disable deprecation warnings on OS X because Lion
26674 started deprecating the shipped copy of openssl. Fixes bug 3643.
26675 - When unable to format an address as a string, report its value
26676 as "???" rather than reusing the last formatted address. Bugfix
26680 Changes in version 0.2.3.2-alpha - 2011-07-18
26681 Tor 0.2.3.2-alpha introduces two new experimental features:
26682 microdescriptors and pluggable transports. It also continues cleaning
26683 up a variety of recently introduced features.
26686 - Clients can now use microdescriptors instead of regular descriptors
26687 to build circuits. Microdescriptors are authority-generated
26688 summaries of regular descriptors' contents, designed to change
26689 very rarely (see proposal 158 for details). This feature is
26690 designed to save bandwidth, especially for clients on slow internet
26691 connections. It's off by default for now, since nearly no caches
26692 support it, but it will be on-by-default for clients in a future
26693 version. You can use the UseMicrodescriptors option to turn it on.
26694 - Tor clients using bridges can now be configured to use a separate
26695 'transport' proxy for each bridge. This approach helps to resist
26696 censorship by allowing bridges to use protocol obfuscation
26697 plugins. It implements part of proposal 180. Implements ticket 2841.
26698 - While we're trying to bootstrap, record how many TLS connections
26699 fail in each state, and report which states saw the most failures
26700 in response to any bootstrap failures. This feature may speed up
26701 diagnosis of censorship events. Implements ticket 3116.
26703 o Major bugfixes (on 0.2.3.1-alpha):
26704 - When configuring a large set of nodes in EntryNodes (as with
26705 'EntryNodes {cc}' or 'EntryNodes 1.1.1.1/16'), choose only a
26706 random subset to be guards, and choose them in random
26707 order. Fixes bug 2798.
26708 - Tor could crash when remembering a consensus in a non-used consensus
26709 flavor without having a current consensus set. Fixes bug 3361.
26710 - Comparing an unknown address to a microdescriptor's shortened exit
26711 policy would always give a "rejected" result. Fixes bug 3599.
26712 - Using microdescriptors as a client no longer prevents Tor from
26713 uploading and downloading hidden service descriptors. Fixes
26717 - Allow nameservers with IPv6 address. Resolves bug 2574.
26718 - Accept attempts to include a password authenticator in the
26719 handshake, as supported by SOCKS5. This handles SOCKS clients that
26720 don't know how to omit a password when authenticating. Resolves
26722 - When configuring a large set of nodes in EntryNodes, and there are
26723 enough of them listed as Guard so that we don't need to consider
26724 the non-guard entries, prefer the ones listed with the Guard flag.
26725 - Check for and recover from inconsistency in the microdescriptor
26726 cache. This will make it harder for us to accidentally free a
26727 microdescriptor without removing it from the appropriate data
26728 structures. Fixes issue 3135; issue noted by "wanoskarnet".
26729 - Log SSL state transitions at log level DEBUG, log domain
26730 HANDSHAKE. This can be useful for debugging censorship events.
26731 Implements ticket 3264.
26732 - Add port 6523 (Gobby) to LongLivedPorts. Patch by intrigeri;
26733 implements ticket 3439.
26735 o Minor bugfixes (on 0.2.3.1-alpha):
26736 - Do not free all general-purpose regular descriptors just
26737 because microdescriptor use is enabled. Fixes bug 3113.
26738 - Correctly link libevent_openssl when --enable-static-libevent
26739 is passed to configure. Fixes bug 3118.
26740 - Bridges should not complain during their heartbeat log messages that
26741 they are unlisted in the consensus: that's more or less the point
26742 of being a bridge. Fixes bug 3183.
26743 - Report a SIGNAL event to controllers when acting on a delayed
26744 SIGNAL NEWNYM command. Previously, we would report a SIGNAL
26745 event to the controller if we acted on a SIGNAL NEWNYM command
26746 immediately, and otherwise not report a SIGNAL event for the
26747 command at all. Fixes bug 3349.
26748 - Fix a crash when handling the SIGNAL controller command or
26749 reporting ERR-level status events with bufferevents enabled. Found
26750 by Robert Ransom. Fixes bug 3367.
26751 - Always ship the tor-fw-helper manpage in our release tarballs.
26752 Fixes bug 3389. Reported by Stephen Walker.
26753 - Fix a class of double-mark-for-close bugs when bufferevents
26754 are enabled. Fixes bug 3403.
26755 - Update tor-fw-helper to support libnatpmp-20110618. Fixes bug 3434.
26756 - Add SIGNAL to the list returned by the 'GETINFO events/names'
26757 control-port command. Fixes part of bug 3465.
26758 - Prevent using negative indices during unit test runs when read_all()
26759 fails. Spotted by coverity.
26760 - Fix a rare memory leak when checking the nodelist without it being
26761 present. Found by coverity.
26762 - Only try to download a microdescriptor-flavored consensus from
26763 a directory cache that provides them.
26765 o Minor bugfixes (on 0.2.2.x and earlier):
26766 - Assert that hidden-service-related operations are not performed
26767 using single-hop circuits. Previously, Tor would assert that
26768 client-side streams are not attached to single-hop circuits,
26769 but not that other sensitive operations on the client and service
26770 side are not performed using single-hop circuits. Fixes bug 3332;
26772 - Don't publish a new relay descriptor when we reload our onion key,
26773 unless the onion key has actually changed. Fixes bug 3263 and
26774 resolves another cause of bug 1810. Bugfix on 0.1.1.11-alpha.
26775 - Allow GETINFO fingerprint to return a fingerprint even when
26776 we have not yet built a router descriptor. Fixes bug 3577;
26777 bugfix on 0.2.0.1-alpha.
26778 - Make 'tor --digests' list hashes of all Tor source files. Bugfix
26779 on 0.2.2.4-alpha; fixes bug 3427.
26781 o Code simplification and refactoring:
26782 - Use tor_sscanf() in place of scanf() in more places through the
26783 code. This makes us a little more locale-independent, and
26784 should help shut up code-analysis tools that can't tell
26785 a safe sscanf string from a dangerous one.
26786 - Use tt_assert(), not tor_assert(), for checking for test failures.
26787 This makes the unit tests more able to go on in the event that
26789 - Split connection_about_to_close() into separate functions for each
26793 - On Windows, we now define the _WIN32_WINNT macros only if they
26794 are not already defined. This lets the person building Tor decide,
26795 if they want, to require a later version of Windows.
26798 Changes in version 0.2.2.30-rc - 2011-07-07
26799 Tor 0.2.2.30-rc is the first release candidate for the Tor 0.2.2.x
26800 series. It fixes a few smaller bugs, but generally appears stable.
26801 Please test it and let us know whether it is!
26804 - Send a SUCCEEDED stream event to the controller when a reverse
26805 resolve succeeded. Fixes bug 3536; bugfix on 0.0.8pre1. Issue
26806 discovered by katmagic.
26807 - Always NUL-terminate the sun_path field of a sockaddr_un before
26808 passing it to the kernel. (Not a security issue: kernels are
26809 smart enough to reject bad sockaddr_uns.) Found by Coverity;
26810 CID #428. Bugfix on Tor 0.2.0.3-alpha.
26811 - Don't stack-allocate the list of supplementary GIDs when we're
26812 about to log them. Stack-allocating NGROUPS_MAX gid_t elements
26813 could take up to 256K, which is way too much stack. Found by
26814 Coverity; CID #450. Bugfix on 0.2.1.7-alpha.
26815 - Add BUILDTIMEOUT_SET to the list returned by the 'GETINFO
26816 events/names' control-port command. Bugfix on 0.2.2.9-alpha;
26817 fixes part of bug 3465.
26818 - Fix a memory leak when receiving a descriptor for a hidden
26819 service we didn't ask for. Found by Coverity; CID #30. Bugfix
26823 - Update to the July 1 2011 Maxmind GeoLite Country database.
26826 Changes in version 0.2.2.29-beta - 2011-06-20
26827 Tor 0.2.2.29-beta reverts an accidental behavior change for users who
26828 have bridge lines in their torrc but don't want to use them; gets
26829 us closer to having the control socket feature working on Debian;
26830 and fixes a variety of smaller bugs.
26833 - Revert the UseBridges option to its behavior before 0.2.2.28-beta.
26834 When we changed the default behavior to "use bridges if any
26835 are listed in the torrc", we surprised users who had bridges
26836 in their torrc files but who didn't actually want to use them.
26837 Partial resolution for bug 3354.
26840 - Don't attach new streams to old rendezvous circuits after SIGNAL
26841 NEWNYM. Previously, we would keep using an existing rendezvous
26842 circuit if it remained open (i.e. if it were kept open by a
26843 long-lived stream, or if a new stream were attached to it before
26844 Tor could notice that it was old and no longer in use). Bugfix on
26845 0.1.1.15-rc; fixes bug 3375.
26848 - Fix a bug when using ControlSocketsGroupWritable with User. The
26849 directory's group would be checked against the current group, not
26850 the configured group. Patch by Jérémy Bobbio. Fixes bug 3393;
26851 bugfix on 0.2.2.26-beta.
26852 - Make connection_printf_to_buf()'s behavior sane. Its callers
26853 expect it to emit a CRLF iff the format string ends with CRLF;
26854 it actually emitted a CRLF iff (a) the format string ended with
26855 CRLF or (b) the resulting string was over 1023 characters long or
26856 (c) the format string did not end with CRLF *and* the resulting
26857 string was 1021 characters long or longer. Bugfix on 0.1.1.9-alpha;
26858 fixes part of bug 3407.
26859 - Make send_control_event_impl()'s behavior sane. Its callers
26860 expect it to always emit a CRLF at the end of the string; it
26861 might have emitted extra control characters as well. Bugfix on
26862 0.1.1.9-alpha; fixes another part of bug 3407.
26863 - Make crypto_rand_int() check the value of its input correctly.
26864 Previously, it accepted values up to UINT_MAX, but could return a
26865 negative number if given a value above INT_MAX+1. Found by George
26866 Kadianakis. Fixes bug 3306; bugfix on 0.2.2pre14.
26867 - Avoid a segfault when reading a malformed circuit build state
26868 with more than INT_MAX entries. Found by wanoskarnet. Bugfix on
26870 - When asked about a DNS record type we don't support via a
26871 client DNSPort, reply with NOTIMPL rather than an empty
26872 reply. Patch by intrigeri. Fixes bug 3369; bugfix on 2.0.1-alpha.
26873 - Fix a rare memory leak during stats writing. Found by coverity.
26876 - Update to the June 1 2011 Maxmind GeoLite Country database.
26878 o Code simplifications and refactoring:
26879 - Remove some dead code as indicated by coverity.
26880 - Remove a few dead assignments during router parsing. Found by
26882 - Add some forgotten return value checks during unit tests. Found
26884 - Don't use 1-bit wide signed bit fields. Found by coverity.
26887 Changes in version 0.2.2.28-beta - 2011-06-04
26888 Tor 0.2.2.28-beta makes great progress towards a new stable release: we
26889 fixed a big bug in whether relays stay in the consensus consistently,
26890 we moved closer to handling bridges and hidden services correctly,
26891 and we started the process of better handling the dreaded "my Vidalia
26892 died, and now my Tor demands a password when I try to reconnect to it"
26896 - Don't decide to make a new descriptor when receiving a HUP signal.
26897 This bug has caused a lot of 0.2.2.x relays to disappear from the
26898 consensus periodically. Fixes the most common case of triggering
26899 bug 1810; bugfix on 0.2.2.7-alpha.
26900 - Actually allow nameservers with IPv6 addresses. Fixes bug 2574.
26901 - Don't try to build descriptors if "ORPort auto" is set and we
26902 don't know our actual ORPort yet. Fix for bug 3216; bugfix on
26904 - Resolve a crash that occurred when setting BridgeRelay to 1 with
26905 accounting enabled. Fixes bug 3228; bugfix on 0.2.2.18-alpha.
26906 - Apply circuit timeouts to opened hidden-service-related circuits
26907 based on the correct start time. Previously, we would apply the
26908 circuit build timeout based on time since the circuit's creation;
26909 it was supposed to be applied based on time since the circuit
26910 entered its current state. Bugfix on 0.0.6; fixes part of bug 1297.
26911 - Use the same circuit timeout for client-side introduction
26912 circuits as for other four-hop circuits, rather than the timeout
26913 for single-hop directory-fetch circuits; the shorter timeout may
26914 have been appropriate with the static circuit build timeout in
26915 0.2.1.x and earlier, but caused many hidden service access attempts
26916 to fail with the adaptive CBT introduced in 0.2.2.2-alpha. Bugfix
26917 on 0.2.2.2-alpha; fixes another part of bug 1297.
26918 - In ticket 2511 we fixed a case where you could use an unconfigured
26919 bridge if you had configured it as a bridge the last time you ran
26920 Tor. Now fix another edge case: if you had configured it as a bridge
26921 but then switched to a different bridge via the controller, you
26922 would still be willing to use the old one. Bugfix on 0.2.0.1-alpha;
26926 - Add an __OwningControllerProcess configuration option and a
26927 TAKEOWNERSHIP control-port command. Now a Tor controller can ensure
26928 that when it exits, Tor will shut down. Implements feature 3049.
26929 - If "UseBridges 1" is set and no bridges are configured, Tor will
26930 now refuse to build any circuits until some bridges are set.
26931 If "UseBridges auto" is set, Tor will use bridges if they are
26932 configured and we are not running as a server, but otherwise will
26933 make circuits as usual. The new default is "auto". Patch by anonym,
26934 so the Tails LiveCD can stop automatically revealing you as a Tor
26938 - Fix warnings from GCC 4.6's "-Wunused-but-set-variable" option.
26939 - Remove a trailing asterisk from "exit-policy/default" in the
26940 output of the control port command "GETINFO info/names". Bugfix
26942 - Use a wide type to hold sockets when built for 64-bit Windows builds.
26944 - Warn when the user configures two HiddenServiceDir lines that point
26945 to the same directory. Bugfix on 0.0.6 (the version introducing
26946 HiddenServiceDir); fixes bug 3289.
26947 - Remove dead code from rend_cache_lookup_v2_desc_as_dir. Fixes
26948 part of bug 2748; bugfix on 0.2.0.10-alpha.
26949 - Log malformed requests for rendezvous descriptors as protocol
26950 warnings, not warnings. Also, use a more informative log message
26951 in case someone sees it at log level warning without prior
26952 info-level messages. Fixes the other part of bug 2748; bugfix
26954 - Clear the table recording the time of the last request for each
26955 hidden service descriptor from each HS directory on SIGNAL NEWNYM.
26956 Previously, we would clear our HS descriptor cache on SIGNAL
26957 NEWNYM, but if we had previously retrieved a descriptor (or tried
26958 to) from every directory responsible for it, we would refuse to
26959 fetch it again for up to 15 minutes. Bugfix on 0.2.2.25-alpha;
26961 - Fix a log message that said "bits" while displaying a value in
26962 bytes. Found by wanoskarnet. Fixes bug 3318; bugfix on
26964 - When checking for 1024-bit keys, check for 1024 bits, not 128
26965 bytes. This allows Tor to correctly discard keys of length 1017
26966 through 1023. Bugfix on 0.0.9pre5.
26969 - Relays now log the reason for publishing a new relay descriptor,
26970 so we have a better chance of hunting down instances of bug 1810.
26971 Resolves ticket 3252.
26972 - Revise most log messages that refer to nodes by nickname to
26973 instead use the "$key=nickname at address" format. This should be
26974 more useful, especially since nicknames are less and less likely
26975 to be unique. Resolves ticket 3045.
26976 - Log (at info level) when purging pieces of hidden-service-client
26977 state because of SIGNAL NEWNYM.
26980 - Remove undocumented option "-F" from tor-resolve: it hasn't done
26981 anything since 0.2.1.16-rc.
26984 Changes in version 0.2.2.27-beta - 2011-05-18
26985 Tor 0.2.2.27-beta fixes a bridge-related stability bug in the previous
26986 release, and also adds a few more general bugfixes.
26989 - Fix a crash bug when changing bridges in a running Tor process.
26990 Fixes bug 3213; bugfix on 0.2.2.26-beta.
26991 - When the controller configures a new bridge, don't wait 10 to 60
26992 seconds before trying to fetch its descriptor. Bugfix on
26993 0.2.0.3-alpha; fixes bug 3198 (suggested by 2355).
26996 - Require that onion keys have exponent 65537 in microdescriptors too.
26997 Fixes more of bug 3207; bugfix on 0.2.2.26-beta.
26998 - Tor used to limit HttpProxyAuthenticator values to 48 characters.
26999 Changed the limit to 512 characters by removing base64 newlines.
27000 Fixes bug 2752. Fix by Michael Yakubovich.
27001 - When a client starts or stops using bridges, never use a circuit
27002 that was built before the configuration change. This behavior could
27003 put at risk a user who uses bridges to ensure that her traffic
27004 only goes to the chosen addresses. Bugfix on 0.2.0.3-alpha; fixes
27008 Changes in version 0.2.2.26-beta - 2011-05-17
27009 Tor 0.2.2.26-beta fixes a variety of potential privacy problems. It
27010 also introduces a new "socksport auto" approach that should make it
27011 easier to run multiple Tors on the same system, and does a lot of
27012 cleanup to get us closer to a release candidate.
27014 o Security/privacy fixes:
27015 - Replace all potentially sensitive memory comparison operations
27016 with versions whose runtime does not depend on the data being
27017 compared. This will help resist a class of attacks where an
27018 adversary can use variations in timing information to learn
27019 sensitive data. Fix for one case of bug 3122. (Safe memcmp
27020 implementation by Robert Ransom based partially on code by DJB.)
27021 - When receiving a hidden service descriptor, check that it is for
27022 the hidden service we wanted. Previously, Tor would store any
27023 hidden service descriptors that a directory gave it, whether it
27024 wanted them or not. This wouldn't have let an attacker impersonate
27025 a hidden service, but it did let directories pre-seed a client
27026 with descriptors that it didn't want. Bugfix on 0.0.6.
27027 - On SIGHUP, do not clear out all TrackHostExits mappings, client
27028 DNS cache entries, and virtual address mappings: that's what
27029 NEWNYM is for. Fixes bug 1345; bugfix on 0.1.0.1-rc.
27032 - The options SocksPort, ControlPort, and so on now all accept a
27033 value "auto" that opens a socket on an OS-selected port. A
27034 new ControlPortWriteToFile option tells Tor to write its
27035 actual control port or ports to a chosen file. If the option
27036 ControlPortFileGroupReadable is set, the file is created as
27037 group-readable. Now users can run two Tor clients on the same
27038 system without needing to manually mess with parameters. Resolves
27039 part of ticket 3076.
27040 - Set SO_REUSEADDR on all sockets, not just listeners. This should
27041 help busy exit nodes avoid running out of useable ports just
27042 because all the ports have been used in the near past. Resolves
27046 - New "GETINFO net/listeners/(type)" controller command to return
27047 a list of addresses and ports that are bound for listeners for a
27048 given connection type. This is useful when the user has configured
27049 "SocksPort auto" and the controller needs to know which port got
27050 chosen. Resolves another part of ticket 3076.
27051 - Add a new ControlSocketsGroupWritable configuration option: when
27052 it is turned on, ControlSockets are group-writeable by the default
27053 group of the current user. Patch by Jérémy Bobbio; implements
27055 - Tor now refuses to create a ControlSocket in a directory that is
27056 world-readable (or group-readable if ControlSocketsGroupWritable
27057 is 0). This is necessary because some operating systems do not
27058 enforce permissions on an AF_UNIX sockets. Permissions on the
27059 directory holding the socket, however, seems to work everywhere.
27060 - Rate-limit a warning about failures to download v2 networkstatus
27061 documents. Resolves part of bug 1352.
27062 - Backport code from 0.2.3.x that allows directory authorities to
27063 clean their microdescriptor caches. Needed to resolve bug 2230.
27064 - When an HTTPS proxy reports "403 Forbidden", we now explain
27065 what it means rather than calling it an unexpected status code.
27066 Closes bug 2503. Patch from Michael Yakubovich.
27067 - Update to the May 1 2011 Maxmind GeoLite Country database.
27070 - Authorities now clean their microdesc cache periodically and when
27071 reading from disk initially, not only when adding new descriptors.
27072 This prevents a bug where we could lose microdescriptors. Bugfix
27073 on 0.2.2.6-alpha. Fixes bug 2230.
27074 - Do not crash when our configuration file becomes unreadable, for
27075 example due to a permissions change, between when we start up
27076 and when a controller calls SAVECONF. Fixes bug 3135; bugfix
27078 - Avoid a bug that would keep us from replacing a microdescriptor
27079 cache on Windows. (We would try to replace the file while still
27080 holding it open. That's fine on Unix, but Windows doesn't let us
27081 do that.) Bugfix on 0.2.2.6-alpha; bug found by wanoskarnet.
27082 - Add missing explanations for the authority-related torrc options
27083 RephistTrackTime, BridgePassword, and V3AuthUseLegacyKey in the
27084 man page. Resolves issue 2379.
27085 - As an authority, do not upload our own vote or signature set to
27086 ourself. It would tell us nothing new, and as of 0.2.2.24-alpha,
27087 it would get flagged as a duplicate. Resolves bug 3026.
27088 - Accept hidden service descriptors if we think we might be a hidden
27089 service directory, regardless of what our consensus says. This
27090 helps robustness, since clients and hidden services can sometimes
27091 have a more up-to-date view of the network consensus than we do,
27092 and if they think that the directory authorities list us a HSDir,
27093 we might actually be one. Related to bug 2732; bugfix on
27095 - When a controller changes TrackHostExits, remove mappings for
27096 hosts that should no longer have their exits tracked. Bugfix on
27098 - When a controller changes VirtualAddrNetwork, remove any mappings
27099 for hosts that were automapped to the old network. Bugfix on
27101 - When a controller changes one of the AutomapHosts* options, remove
27102 any mappings for hosts that should no longer be automapped. Bugfix
27104 - Do not reset the bridge descriptor download status every time we
27105 re-parse our configuration or get a configuration change. Fixes
27106 bug 3019; bugfix on 0.2.0.3-alpha.
27108 o Minor bugfixes (code cleanup):
27109 - When loading the microdesc journal, remember its current size.
27110 In 0.2.2, this helps prevent the microdesc journal from growing
27111 without limit on authorities (who are the only ones to use it in
27112 0.2.2). Fixes a part of bug 2230; bugfix on 0.2.2.6-alpha.
27113 Fix posted by "cypherpunks."
27114 - The microdesc journal is supposed to get rebuilt only if it is
27115 at least _half_ the length of the store, not _twice_ the length
27116 of the store. Bugfix on 0.2.2.6-alpha; fixes part of bug 2230.
27117 - Fix a potential null-pointer dereference while computing a
27118 consensus. Bugfix on 0.2.0.3-alpha, found with the help of
27120 - Avoid a possible null-pointer dereference when rebuilding the mdesc
27121 cache without actually having any descriptors to cache. Bugfix on
27122 0.2.2.6-alpha. Issue discovered using clang's static analyzer.
27123 - If we fail to compute the identity digest of a v3 legacy keypair,
27124 warn, and don't use a buffer-full of junk instead. Bugfix on
27125 0.2.1.1-alpha; fixes bug 3106.
27126 - Resolve an untriggerable issue in smartlist_string_num_isin(),
27127 where if the function had ever in the future been used to check
27128 for the presence of a too-large number, it would have given an
27129 incorrect result. (Fortunately, we only used it for 16-bit
27130 values.) Fixes bug 3175; bugfix on 0.1.0.1-rc.
27131 - Require that introduction point keys and onion handshake keys
27132 have a public exponent of 65537. Starts to fix bug 3207; bugfix
27135 o Removed features:
27136 - Caches no longer download and serve v2 networkstatus documents
27137 unless FetchV2Networkstatus flag is set: these documents haven't
27138 haven't been used by clients or relays since 0.2.0.x. Resolves
27142 Changes in version 0.2.3.1-alpha - 2011-05-05
27143 Tor 0.2.3.1-alpha adds some new experimental features, including support
27144 for an improved network IO backend, IOCP networking on Windows,
27145 microdescriptor caching, "fast-start" support for streams, and automatic
27146 home router configuration. There are also numerous internal improvements
27147 to try to make the code easier for developers to work with.
27149 This is the first alpha release in a new series, so expect there to be
27150 bugs. Users who would rather test out a more stable branch should
27151 stay with 0.2.2.x for now.
27154 - Tor can now optionally build with the "bufferevents" buffered IO
27155 backend provided by Libevent 2. To use this feature, make sure you
27156 have the latest possible version of Libevent, and pass the
27157 --enable-bufferevents flag to configure when building Tor from
27158 source. This feature will make our networking code more flexible,
27159 let us stack layers on each other, and let us use more efficient
27160 zero-copy transports where available.
27161 - As an experimental feature, Tor can use IOCP for networking on Windows.
27162 Once this code is tuned and optimized, it promises much better
27163 performance than the select-based backend we've used in the past. To
27164 try this feature, you must build Tor with Libevent 2, configure Tor
27165 with the "bufferevents" buffered IO backend, and add "DisableIOCP 0" to
27166 your torrc. There are known bugs here: only try this if you can help
27167 debug it as it breaks.
27168 - The EntryNodes option can now include country codes like {de} or IP
27169 addresses or network masks. Previously we had disallowed these options
27170 because we didn't have an efficient way to keep the list up to
27171 date. Fixes bug 1982, but see bug 2798 for an unresolved issue here.
27172 - Exit nodes now accept and queue data on not-yet-connected streams.
27173 Previously, the client wasn't allowed to send data until the stream was
27174 connected, which slowed down all connections. This change will enable
27175 clients to perform a "fast-start" on streams and send data without
27176 having to wait for a confirmation that the stream has opened. (Patch
27177 from Ian Goldberg; implements the server side of Proposal 174.)
27178 - Tor now has initial support for automatic port mapping on the many
27179 home routers that support NAT-PMP or UPnP. (Not yet supported on
27180 Windows). To build the support code, you'll need to have libnatpnp
27181 library and/or the libminiupnpc library, and you'll need to enable the
27182 feature specifically by passing "--enable-upnp" and/or
27183 "--enable-natpnp" to configure. To turn it on, use the new
27184 PortForwarding option.
27185 - Caches now download, cache, and serve multiple "flavors" of the
27186 consensus, including a flavor that describes microdescriptors.
27187 - Caches now download, cache, and serve microdescriptors -- small
27188 summaries of router descriptors that are authenticated by all of the
27189 directory authorities. Once enough caches are running this code,
27190 clients will be able to save significant amounts of directory bandwidth
27191 by downloading microdescriptors instead of router descriptors.
27194 - Make logging resolution configurable with a new LogTimeGranularity
27195 option, and change the default from 1 millisecond to 1 second.
27196 Implements enhancement 1668.
27197 - We log which torrc file we're using on startup. Implements ticket
27199 - Ordinarily, Tor does not count traffic from private addresses (like
27200 127.0.0.1 or 10.0.0.1) when calculating rate limits or accounting.
27201 There is now a new option, CountPrivateBandwidth, to disable this
27202 behavior. Patch from Daniel Cagara.
27203 - New --enable-static-tor configure option for building Tor as
27204 statically as possible. Idea, general hackery and thoughts from
27205 Alexei Czeskis, John Gilmore, Jacob Appelbaum. Implements ticket
27207 - If you set the NumCPUs option to 0, Tor will now try to detect how
27208 many CPUs you have. This is the new default behavior.
27209 - Turn on directory request statistics by default and include them in
27210 extra-info descriptors. Don't break if we have no GeoIP database.
27211 - Relays that set "ConnDirectionStatistics 1" write statistics on the
27212 bidirectional use of connections to disk every 24 hours.
27213 - Add a GeoIP file digest to the extra-info descriptor. Implements
27215 - The NodeFamily option -- which let you declare that you want to
27216 consider nodes to be part of a family whether they list themselves
27217 that way or not -- now allows IP address ranges and country codes.
27218 - Add a new 'Heartbeat' log message type to periodically log a message
27219 describing Tor's status at level Notice. This feature is meant for
27220 operators who log at notice, and want to make sure that their Tor
27221 server is still working. Implementation by George Kadianakis.
27223 o Minor bugfixes (on 0.2.2.25-alpha):
27224 - When loading the microdesc journal, remember its current size.
27225 In 0.2.2, this helps prevent the microdesc journal from growing
27226 without limit on authorities (who are the only ones to use it in
27227 0.2.2). Fixes a part of bug 2230; bugfix on 0.2.2.6-alpha.
27228 Fix posted by "cypherpunks."
27229 - The microdesc journal is supposed to get rebuilt only if it is
27230 at least _half_ the length of the store, not _twice_ the length
27231 of the store. Bugfix on 0.2.2.6-alpha; fixes part of bug 2230.
27232 - If as an authority we fail to compute the identity digest of a v3
27233 legacy keypair, warn, and don't use a buffer-full of junk instead.
27234 Bugfix on 0.2.1.1-alpha; fixes bug 3106.
27235 - Authorities now clean their microdesc cache periodically and when
27236 reading from disk initially, not only when adding new descriptors.
27237 This prevents a bug where we could lose microdescriptors. Bugfix
27240 o Minor features (controller):
27241 - Add a new SIGNAL event to the controller interface so that
27242 controllers can be notified when Tor handles a signal. Resolves
27243 issue 1955. Patch by John Brooks.
27244 - Add a new GETINFO option to get total bytes read and written. Patch
27245 from pipe, revised by atagar. Resolves ticket 2345.
27246 - Implement some GETINFO controller fields to provide information about
27247 the Tor process's pid, euid, username, and resource limits.
27250 - Our build system requires automake 1.6 or later to create the
27251 Makefile.in files. Previously, you could have used 1.4.
27252 This only affects developers and people building Tor from git;
27253 people who build Tor from the source distribution without changing
27254 the Makefile.am files should be fine.
27255 - Our autogen.sh script uses autoreconf to launch autoconf, automake, and
27256 so on. This is more robust against some of the failure modes
27257 associated with running the autotools pieces on their own.
27259 o Minor packaging issues:
27260 - On OpenSUSE, create the /var/run/tor directory on startup if it is not
27261 already created. Patch from Andreas Stieger. Fixes bug 2573.
27263 o Code simplifications and refactoring:
27264 - A major revision to our internal node-selecting and listing logic.
27265 Tor already had at least two major ways to look at the question of
27266 "which Tor servers do we know about": a list of router descriptors,
27267 and a list of entries in the current consensus. With
27268 microdescriptors, we're adding a third. Having so many systems
27269 without an abstraction layer over them was hurting the codebase.
27270 Now, we have a new "node_t" abstraction that presents a consistent
27271 interface to a client's view of a Tor node, and holds (nearly) all
27272 of the mutable state formerly in routerinfo_t and routerstatus_t.
27273 - The helper programs tor-gencert, tor-resolve, and tor-checkkey
27274 no longer link against Libevent: they never used it, but
27275 our library structure used to force them to link it.
27277 o Removed features:
27278 - Remove some old code to work around even older versions of Tor that
27279 used forked processes to handle DNS requests. Such versions of Tor
27280 are no longer in use as servers.
27282 o Documentation fixes:
27283 - Correct a broken faq link in the INSTALL file. Fixes bug 2307.
27284 - Add missing documentation for the authority-related torrc options
27285 RephistTrackTime, BridgePassword, and V3AuthUseLegacyKey. Resolves
27289 Changes in version 0.2.2.25-alpha - 2011-04-29
27290 Tor 0.2.2.25-alpha fixes many bugs: hidden service clients are more
27291 robust, routers no longer overreport their bandwidth, Win7 should crash
27292 a little less, and NEWNYM (as used by Vidalia's "new identity" button)
27293 now prevents hidden service-related activity from being linkable. It
27294 provides more information to Vidalia so you can see if your bridge is
27295 working. Also, 0.2.2.25-alpha revamps the Entry/Exit/ExcludeNodes and
27296 StrictNodes configuration options to make them more reliable, more
27297 understandable, and more regularly applied. If you use those options,
27298 please see the revised documentation for them in the manual page.
27301 - Relays were publishing grossly inflated bandwidth values because
27302 they were writing their state files wrong--now they write the
27303 correct value. Also, resume reading bandwidth history from the
27304 state file correctly. Fixes bug 2704; bugfix on 0.2.2.23-alpha.
27305 - Improve hidden service robustness: When we find that we have
27306 extended a hidden service's introduction circuit to a relay not
27307 listed as an introduction point in the HS descriptor we currently
27308 have, retry with an introduction point from the current
27309 descriptor. Previously we would just give up. Fixes bugs 1024 and
27310 1930; bugfix on 0.2.0.10-alpha.
27311 - Clients now stop trying to use an exit node associated with a given
27312 destination by TrackHostExits if they fail to reach that exit node.
27313 Fixes bug 2999. Bugfix on 0.2.0.20-rc.
27314 - Fix crash bug on platforms where gmtime and localtime can return
27315 NULL. Windows 7 users were running into this one. Fixes part of bug
27316 2077. Bugfix on all versions of Tor. Found by boboper.
27318 o Security and stability fixes:
27319 - Don't double-free a parsable, but invalid, microdescriptor, even if
27320 it is followed in the blob we're parsing by an unparsable
27321 microdescriptor. Fixes an issue reported in a comment on bug 2954.
27322 Bugfix on 0.2.2.6-alpha; fix by "cypherpunks".
27323 - If the Nickname configuration option isn't given, Tor would pick a
27324 nickname based on the local hostname as the nickname for a relay.
27325 Because nicknames are not very important in today's Tor and the
27326 "Unnamed" nickname has been implemented, this is now problematic
27327 behavior: It leaks information about the hostname without being
27328 useful at all. Fixes bug 2979; bugfix on 0.1.2.2-alpha, which
27329 introduced the Unnamed nickname. Reported by tagnaq.
27330 - Fix an uncommon assertion failure when running with DNSPort under
27331 heavy load. Fixes bug 2933; bugfix on 0.2.0.1-alpha.
27332 - Avoid linkability based on cached hidden service descriptors: forget
27333 all hidden service descriptors cached as a client when processing a
27334 SIGNAL NEWNYM command. Fixes bug 3000; bugfix on 0.0.6.
27337 - Export GeoIP information on bridge usage to controllers even if we
27338 have not yet been running for 24 hours. Now Vidalia bridge operators
27339 can get more accurate and immediate feedback about their
27340 contributions to the network.
27342 o Major features and bugfixes (node selection):
27343 - Revise and reconcile the meaning of the ExitNodes, EntryNodes,
27344 ExcludeEntryNodes, ExcludeExitNodes, ExcludeNodes, and StrictNodes
27345 options. Previously, we had been ambiguous in describing what
27346 counted as an "exit" node, and what operations exactly "StrictNodes
27347 0" would permit. This created confusion when people saw nodes built
27348 through unexpected circuits, and made it hard to tell real bugs from
27349 surprises. Now the intended behavior is:
27350 . "Exit", in the context of ExitNodes and ExcludeExitNodes, means
27351 a node that delivers user traffic outside the Tor network.
27352 . "Entry", in the context of EntryNodes, means a node used as the
27353 first hop of a multihop circuit. It doesn't include direct
27354 connections to directory servers.
27355 . "ExcludeNodes" applies to all nodes.
27356 . "StrictNodes" changes the behavior of ExcludeNodes only. When
27357 StrictNodes is set, Tor should avoid all nodes listed in
27358 ExcludeNodes, even when it will make user requests fail. When
27359 StrictNodes is *not* set, then Tor should follow ExcludeNodes
27360 whenever it can, except when it must use an excluded node to
27361 perform self-tests, connect to a hidden service, provide a
27362 hidden service, fulfill a .exit request, upload directory
27363 information, or fetch directory information.
27364 Collectively, the changes to implement the behavior fix bug 1090.
27365 - ExcludeNodes now takes precedence over EntryNodes and ExitNodes: if
27366 a node is listed in both, it's treated as excluded.
27367 - ExcludeNodes now applies to directory nodes -- as a preference if
27368 StrictNodes is 0, or an absolute requirement if StrictNodes is 1.
27369 Don't exclude all the directory authorities and set StrictNodes to 1
27370 unless you really want your Tor to break.
27371 - ExcludeNodes and ExcludeExitNodes now override exit enclaving.
27372 - ExcludeExitNodes now overrides .exit requests.
27373 - We don't use bridges listed in ExcludeNodes.
27374 - When StrictNodes is 1:
27375 . We now apply ExcludeNodes to hidden service introduction points
27376 and to rendezvous points selected by hidden service users. This
27377 can make your hidden service less reliable: use it with caution!
27378 . If we have used ExcludeNodes on ourself, do not try relay
27379 reachability self-tests.
27380 . If we have excluded all the directory authorities, we will not
27381 even try to upload our descriptor if we're a relay.
27382 . Do not honor .exit requests to an excluded node.
27383 - Remove a misfeature that caused us to ignore the Fast/Stable flags
27384 when ExitNodes is set. Bugfix on 0.2.2.7-alpha.
27385 - When the set of permitted nodes changes, we now remove any mappings
27386 introduced via TrackExitHosts to now-excluded nodes. Bugfix on
27388 - We never cannibalize a circuit that had excluded nodes on it, even
27389 if StrictNodes is 0. Bugfix on 0.1.0.1-rc.
27390 - Revert a change where we would be laxer about attaching streams to
27391 circuits than when building the circuits. This was meant to prevent
27392 a set of bugs where streams were never attachable, but our improved
27393 code here should make this unnecessary. Bugfix on 0.2.2.7-alpha.
27394 - Keep track of how many times we launch a new circuit to handle a
27395 given stream. Too many launches could indicate an inconsistency
27396 between our "launch a circuit to handle this stream" logic and our
27397 "attach this stream to one of the available circuits" logic.
27398 - Improve log messages related to excluded nodes.
27401 - Fix a spurious warning when moving from a short month to a long
27402 month on relays with month-based BandwidthAccounting. Bugfix on
27403 0.2.2.17-alpha; fixes bug 3020.
27404 - When a client finds that an origin circuit has run out of 16-bit
27405 stream IDs, we now mark it as unusable for new streams. Previously,
27406 we would try to close the entire circuit. Bugfix on 0.0.6.
27407 - Add a forgotten cast that caused a compile warning on OS X 10.6.
27408 Bugfix on 0.2.2.24-alpha.
27409 - Be more careful about reporting the correct error from a failed
27410 connect() system call. Under some circumstances, it was possible to
27411 look at an incorrect value for errno when sending the end reason.
27412 Bugfix on 0.1.0.1-rc.
27413 - Correctly handle an "impossible" overflow cases in connection byte
27414 counting, where we write or read more than 4GB on an edge connection
27415 in a single second. Bugfix on 0.1.2.8-beta.
27416 - Correct the warning displayed when a rendezvous descriptor exceeds
27417 the maximum size. Fixes bug 2750; bugfix on 0.2.1.5-alpha. Found by
27419 - Clients and hidden services now use HSDir-flagged relays for hidden
27420 service descriptor downloads and uploads even if the relays have no
27421 DirPort set and the client has disabled TunnelDirConns. This will
27422 eventually allow us to give the HSDir flag to relays with no
27423 DirPort. Fixes bug 2722; bugfix on 0.2.1.6-alpha.
27424 - Downgrade "no current certificates known for authority" message from
27425 Notice to Info. Fixes bug 2899; bugfix on 0.2.0.10-alpha.
27426 - Make the SIGNAL DUMP control-port command work on FreeBSD. Fixes bug
27427 2917. Bugfix on 0.1.1.1-alpha.
27428 - Only limit the lengths of single HS descriptors, even when multiple
27429 HS descriptors are published to an HSDir relay in a single POST
27430 operation. Fixes bug 2948; bugfix on 0.2.1.5-alpha. Found by hsdir.
27431 - Write the current time into the LastWritten line in our state file,
27432 rather than the time from the previous write attempt. Also, stop
27433 trying to use a time of -1 in our log statements. Fixes bug 3039;
27434 bugfix on 0.2.2.14-alpha.
27435 - Be more consistent in our treatment of file system paths. "~" should
27436 get expanded to the user's home directory in the Log config option.
27437 Fixes bug 2971; bugfix on 0.2.0.1-alpha, which introduced the
27438 feature for the -f and --DataDirectory options.
27441 - Make sure every relay writes a state file at least every 12 hours.
27442 Previously, a relay could go for weeks without writing its state
27443 file, and on a crash could lose its bandwidth history, capacity
27444 estimates, client country statistics, and so on. Addresses bug 3012.
27445 - Send END_STREAM_REASON_NOROUTE in response to EHOSTUNREACH errors.
27446 Clients before 0.2.1.27 didn't handle NOROUTE correctly, but such
27447 clients are already deprecated because of security bugs.
27448 - Don't allow v0 hidden service authorities to act as clients.
27449 Required by fix for bug 3000.
27450 - Ignore SIGNAL NEWNYM commands on relay-only Tor instances. Required
27451 by fix for bug 3000.
27452 - Ensure that no empty [dirreq-](read|write)-history lines are added
27453 to an extrainfo document. Implements ticket 2497.
27455 o Code simplification and refactoring:
27456 - Remove workaround code to handle directory responses from servers
27457 that had bug 539 (they would send HTTP status 503 responses _and_
27458 send a body too). Since only server versions before
27459 0.2.0.16-alpha/0.1.2.19 were affected, there is no longer reason to
27460 keep the workaround in place.
27461 - Remove the old 'fuzzy time' logic. It was supposed to be used for
27462 handling calculations where we have a known amount of clock skew and
27463 an allowed amount of unknown skew. But we only used it in three
27464 places, and we never adjusted the known/unknown skew values. This is
27465 still something we might want to do someday, but if we do, we'll
27466 want to do it differently.
27467 - Avoid signed/unsigned comparisons by making SIZE_T_CEILING unsigned.
27468 None of the cases where we did this before were wrong, but by making
27469 this change we avoid warnings. Fixes bug 2475; bugfix on 0.2.1.28.
27470 - Use GetTempDir to find the proper temporary directory location on
27471 Windows when generating temporary files for the unit tests. Patch by
27475 Changes in version 0.2.2.24-alpha - 2011-04-08
27476 Tor 0.2.2.24-alpha fixes a variety of bugs, including a big bug that
27477 prevented Tor clients from effectively using "multihomed" bridges,
27478 that is, bridges that listen on multiple ports or IP addresses so users
27479 can continue to use some of their addresses even if others get blocked.
27482 - Fix a bug where bridge users who configure the non-canonical
27483 address of a bridge automatically switch to its canonical
27484 address. If a bridge listens at more than one address, it should be
27485 able to advertise those addresses independently and any non-blocked
27486 addresses should continue to work. Bugfix on Tor 0.2.0.x. Fixes
27488 - If you configured Tor to use bridge A, and then quit and
27489 configured Tor to use bridge B instead, it would happily continue
27490 to use bridge A if it's still reachable. While this behavior is
27491 a feature if your goal is connectivity, in some scenarios it's a
27492 dangerous bug. Bugfix on Tor 0.2.0.1-alpha; fixes bug 2511.
27493 - Directory authorities now use data collected from their own
27494 uptime observations when choosing whether to assign the HSDir flag
27495 to relays, instead of trusting the uptime value the relay reports in
27496 its descriptor. This change helps prevent an attack where a small
27497 set of nodes with frequently-changing identity keys can blackhole
27498 a hidden service. (Only authorities need upgrade; others will be
27499 fine once they do.) Bugfix on 0.2.0.10-alpha; fixes bug 2709.
27502 - When we restart our relay, we might get a successful connection
27503 from the outside before we've started our reachability tests,
27504 triggering a warning: "ORPort found reachable, but I have no
27505 routerinfo yet. Failing to inform controller of success." This
27506 bug was harmless unless Tor is running under a controller
27507 like Vidalia, in which case the controller would never get a
27508 REACHABILITY_SUCCEEDED status event. Bugfix on 0.1.2.6-alpha;
27510 - Make directory authorities more accurate at recording when
27511 relays that have failed several reachability tests became
27512 unreachable, so we can provide more accuracy at assigning Stable,
27513 Guard, HSDir, etc flags. Bugfix on 0.2.0.6-alpha. Resolves bug 2716.
27514 - Fix an issue that prevented static linking of libevent on
27515 some platforms (notably Linux). Fixes bug 2698; bugfix on
27516 versions 0.2.1.23/0.2.2.8-alpha (the versions introducing
27517 the --with-static-libevent configure option).
27518 - We now ask the other side of a stream (the client or the exit)
27519 for more data on that stream when the amount of queued data on
27520 that stream dips low enough. Previously, we wouldn't ask the
27521 other side for more data until either it sent us more data (which
27522 it wasn't supposed to do if it had exhausted its window!) or we
27523 had completely flushed all our queued data. This flow control fix
27524 should improve throughput. Fixes bug 2756; bugfix on the earliest
27525 released versions of Tor (svn commit r152).
27526 - Avoid a double-mark-for-free warning when failing to attach a
27527 transparent proxy connection. (We thought we had fixed this in
27528 0.2.2.23-alpha, but it turns out our fix was checking the wrong
27529 connection.) Fixes bug 2757; bugfix on 0.1.2.1-alpha (the original
27530 bug) and 0.2.2.23-alpha (the incorrect fix).
27531 - When warning about missing zlib development packages during compile,
27532 give the correct package names. Bugfix on 0.2.0.1-alpha.
27535 - Directory authorities now log the source of a rejected POSTed v3
27536 networkstatus vote.
27537 - Make compilation with clang possible when using
27538 --enable-gcc-warnings by removing two warning options that clang
27539 hasn't implemented yet and by fixing a few warnings. Implements
27541 - When expiring circuits, use microsecond timers rather than
27542 one-second timers. This can avoid an unpleasant situation where a
27543 circuit is launched near the end of one second and expired right
27544 near the beginning of the next, and prevent fluctuations in circuit
27546 - Use computed circuit-build timeouts to decide when to launch
27547 parallel introduction circuits for hidden services. (Previously,
27548 we would retry after 15 seconds.)
27549 - Update to the April 1 2011 Maxmind GeoLite Country database.
27552 - Create the /var/run/tor directory on startup on OpenSUSE if it is
27553 not already created. Patch from Andreas Stieger. Fixes bug 2573.
27555 o Documentation changes:
27556 - Modernize the doxygen configuration file slightly. Fixes bug 2707.
27557 - Resolve all doxygen warnings except those for missing documentation.
27559 - Add doxygen documentation for more functions, fields, and types.
27562 Changes in version 0.2.2.23-alpha - 2011-03-08
27563 Tor 0.2.2.23-alpha lets relays record their bandwidth history so when
27564 they restart they don't lose their bandwidth capacity estimate. This
27565 release also fixes a diverse set of user-facing bugs, ranging from
27566 relays overrunning their rate limiting to clients falsely warning about
27567 clock skew to bridge descriptor leaks by our bridge directory authority.
27570 - Stop sending a CLOCK_SKEW controller status event whenever
27571 we fetch directory information from a relay that has a wrong clock.
27572 Instead, only inform the controller when it's a trusted authority
27573 that claims our clock is wrong. Bugfix on 0.1.2.6-alpha; fixes
27574 the rest of bug 1074.
27575 - Fix an assert in parsing router descriptors containing IPv6
27576 addresses. This one took down the directory authorities when
27577 somebody tried some experimental code. Bugfix on 0.2.1.3-alpha.
27578 - Make the bridge directory authority refuse to answer directory
27579 requests for "all" descriptors. It used to include bridge
27580 descriptors in its answer, which was a major information leak.
27581 Found by "piebeer". Bugfix on 0.2.0.3-alpha.
27582 - If relays set RelayBandwidthBurst but not RelayBandwidthRate,
27583 Tor would ignore their RelayBandwidthBurst setting,
27584 potentially using more bandwidth than expected. Bugfix on
27585 0.2.0.1-alpha. Reported by Paul Wouters. Fixes bug 2470.
27586 - Ignore and warn if the user mistakenly sets "PublishServerDescriptor
27587 hidserv" in her torrc. The 'hidserv' argument never controlled
27588 publication of hidden service descriptors. Bugfix on 0.2.0.1-alpha.
27591 - Relays now save observed peak bandwidth throughput rates to their
27592 state file (along with total usage, which was already saved)
27593 so that they can determine their correct estimated bandwidth on
27594 restart. Resolves bug 1863, where Tor relays would reset their
27595 estimated bandwidth to 0 after restarting.
27596 - Directory authorities now take changes in router IP address and
27597 ORPort into account when determining router stability. Previously,
27598 if a router changed its IP or ORPort, the authorities would not
27599 treat it as having any downtime for the purposes of stability
27600 calculation, whereas clients would experience downtime since the
27601 change could take a while to propagate to them. Resolves issue 1035.
27602 - Enable Address Space Layout Randomization (ASLR) and Data Execution
27603 Prevention (DEP) by default on Windows to make it harder for
27604 attackers to exploit vulnerabilities. Patch from John Brooks.
27606 o Minor bugfixes (on 0.2.1.x and earlier):
27607 - Fix a rare crash bug that could occur when a client was configured
27608 with a large number of bridges. Fixes bug 2629; bugfix on
27609 0.2.1.2-alpha. Bugfix by trac user "shitlei".
27610 - Avoid a double mark-for-free warning when failing to attach a
27611 transparent proxy connection. Bugfix on 0.1.2.1-alpha. Fixes
27613 - Correctly detect failure to allocate an OpenSSL BIO. Fixes bug 2378;
27614 found by "cypherpunks". This bug was introduced before the first
27615 Tor release, in svn commit r110.
27616 - Country codes aren't supported in EntryNodes until 0.2.3.x, so
27617 don't mention them in the manpage. Fixes bug 2450; issue
27618 spotted by keb and G-Lo.
27619 - Fix a bug in bandwidth history state parsing that could have been
27620 triggered if a future version of Tor ever changed the timing
27621 granularity at which bandwidth history is measured. Bugfix on
27622 Tor 0.1.1.11-alpha.
27623 - When a relay decides that its DNS is too broken for it to serve
27624 as an exit server, it advertised itself as a non-exit, but
27625 continued to act as an exit. This could create accidental
27626 partitioning opportunities for users. Instead, if a relay is
27627 going to advertise reject *:* as its exit policy, it should
27628 really act with exit policy "reject *:*". Fixes bug 2366.
27629 Bugfix on Tor 0.1.2.5-alpha. Bugfix by user "postman" on trac.
27630 - In the special case where you configure a public exit relay as your
27631 bridge, Tor would be willing to use that exit relay as the last
27632 hop in your circuit as well. Now we fail that circuit instead.
27633 Bugfix on 0.2.0.12-alpha. Fixes bug 2403. Reported by "piebeer".
27634 - Fix a bug with our locking implementation on Windows that couldn't
27635 correctly detect when a file was already locked. Fixes bug 2504,
27636 bugfix on 0.2.1.6-alpha.
27637 - Fix IPv6-related connect() failures on some platforms (BSD, OS X).
27638 Bugfix on 0.2.0.3-alpha; fixes first part of bug 2660. Patch by
27640 - Set target port in get_interface_address6() correctly. Bugfix
27641 on 0.1.1.4-alpha and 0.2.0.3-alpha; fixes second part of bug 2660.
27642 - Directory authorities are now more robust to hops back in time
27643 when calculating router stability. Previously, if a run of uptime
27644 or downtime appeared to be negative, the calculation could give
27645 incorrect results. Bugfix on 0.2.0.6-alpha; noticed when fixing
27647 - Fix an assert that got triggered when using the TestingTorNetwork
27648 configuration option and then issuing a GETINFO config-text control
27649 command. Fixes bug 2250; bugfix on 0.2.1.2-alpha.
27651 o Minor bugfixes (on 0.2.2.x):
27652 - Clients should not weight BadExit nodes as Exits in their node
27653 selection. Similarly, directory authorities should not count BadExit
27654 bandwidth as Exit bandwidth when computing bandwidth-weights.
27655 Bugfix on 0.2.2.10-alpha; fixes bug 2203.
27656 - Correctly clear our dir_read/dir_write history when there is an
27657 error parsing any bw history value from the state file. Bugfix on
27658 Tor 0.2.2.15-alpha.
27659 - Resolve a bug in verifying signatures of directory objects
27660 with digests longer than SHA1. Bugfix on 0.2.2.20-alpha.
27661 Fixes bug 2409. Found by "piebeer".
27662 - Bridge authorities no longer crash on SIGHUP when they try to
27663 publish their relay descriptor to themselves. Fixes bug 2572. Bugfix
27667 - Log less aggressively about circuit timeout changes, and improve
27668 some other circuit timeout messages. Resolves bug 2004.
27669 - Log a little more clearly about the times at which we're no longer
27670 accepting new connections. Resolves bug 2181.
27671 - Reject attempts at the client side to open connections to private
27672 IP addresses (like 127.0.0.1, 10.0.0.1, and so on) with
27673 a randomly chosen exit node. Attempts to do so are always
27674 ill-defined, generally prevented by exit policies, and usually
27675 in error. This will also help to detect loops in transparent
27676 proxy configurations. You can disable this feature by setting
27677 "ClientRejectInternalAddresses 0" in your torrc.
27678 - Always treat failure to allocate an RSA key as an unrecoverable
27680 - Update to the March 1 2011 Maxmind GeoLite Country database.
27682 o Minor features (log subsystem):
27683 - Add documentation for configuring logging at different severities in
27684 different log domains. We've had this feature since 0.2.1.1-alpha,
27685 but for some reason it never made it into the manpage. Fixes
27687 - Make it simpler to specify "All log domains except for A and B".
27688 Previously you needed to say "[*,~A,~B]". Now you can just say
27690 - Add a "LogMessageDomains 1" option to include the domains of log
27691 messages along with the messages. Without this, there's no way
27692 to use log domains without reading the source or doing a lot
27695 o Packaging changes:
27696 - Stop shipping the Tor specs files and development proposal documents
27697 in the tarball. They are now in a separate git repository at
27698 git://git.torproject.org/torspec.git
27701 Changes in version 0.2.1.30 - 2011-02-23
27702 Tor 0.2.1.30 fixes a variety of less critical bugs. The main other
27703 change is a slight tweak to Tor's TLS handshake that makes relays
27704 and bridges that run this new version reachable from Iran again.
27705 We don't expect this tweak will win the arms race long-term, but it
27706 buys us time until we roll out a better solution.
27709 - Stop sending a CLOCK_SKEW controller status event whenever
27710 we fetch directory information from a relay that has a wrong clock.
27711 Instead, only inform the controller when it's a trusted authority
27712 that claims our clock is wrong. Bugfix on 0.1.2.6-alpha; fixes
27713 the rest of bug 1074.
27714 - Fix a bounds-checking error that could allow an attacker to
27715 remotely crash a directory authority. Bugfix on 0.2.1.5-alpha.
27716 Found by "piebeer".
27717 - If relays set RelayBandwidthBurst but not RelayBandwidthRate,
27718 Tor would ignore their RelayBandwidthBurst setting,
27719 potentially using more bandwidth than expected. Bugfix on
27720 0.2.0.1-alpha. Reported by Paul Wouters. Fixes bug 2470.
27721 - Ignore and warn if the user mistakenly sets "PublishServerDescriptor
27722 hidserv" in her torrc. The 'hidserv' argument never controlled
27723 publication of hidden service descriptors. Bugfix on 0.2.0.1-alpha.
27726 - Adjust our TLS Diffie-Hellman parameters to match those used by
27728 - Update to the February 1 2011 Maxmind GeoLite Country database.
27731 - Check for and reject overly long directory certificates and
27732 directory tokens before they have a chance to hit any assertions.
27733 Bugfix on 0.2.1.28. Found by "doorss".
27734 - Bring the logic that gathers routerinfos and assesses the
27735 acceptability of circuits into line. This prevents a Tor OP from
27736 getting locked in a cycle of choosing its local OR as an exit for a
27737 path (due to a .exit request) and then rejecting the circuit because
27738 its OR is not listed yet. It also prevents Tor clients from using an
27739 OR running in the same instance as an exit (due to a .exit request)
27740 if the OR does not meet the same requirements expected of an OR
27741 running elsewhere. Fixes bug 1859; bugfix on 0.1.0.1-rc.
27743 o Packaging changes:
27744 - Stop shipping the Tor specs files and development proposal documents
27745 in the tarball. They are now in a separate git repository at
27746 git://git.torproject.org/torspec.git
27747 - Do not include Git version tags as though they are SVN tags when
27748 generating a tarball from inside a repository that has switched
27749 between branches. Bugfix on 0.2.1.15-rc; fixes bug 2402.
27752 Changes in version 0.2.2.22-alpha - 2011-01-25
27753 Tor 0.2.2.22-alpha fixes a few more less-critical security issues. The
27754 main other change is a slight tweak to Tor's TLS handshake that makes
27755 relays and bridges that run this new version reachable from Iran again.
27756 We don't expect this tweak will win the arms race long-term, but it
27757 will buy us a bit more time until we roll out a better solution.
27760 - Fix a bounds-checking error that could allow an attacker to
27761 remotely crash a directory authority. Bugfix on 0.2.1.5-alpha.
27762 Found by "piebeer".
27763 - Don't assert when changing from bridge to relay or vice versa
27764 via the controller. The assert happened because we didn't properly
27765 initialize our keys in this case. Bugfix on 0.2.2.18-alpha; fixes
27766 bug 2433. Reported by bastik.
27769 - Adjust our TLS Diffie-Hellman parameters to match those used by
27771 - Provide a log message stating which geoip file we're parsing
27772 instead of just stating that we're parsing the geoip file.
27773 Implements ticket 2432.
27776 - Check for and reject overly long directory certificates and
27777 directory tokens before they have a chance to hit any assertions.
27778 Bugfix on 0.2.1.28 / 0.2.2.20-alpha. Found by "doorss".
27781 Changes in version 0.2.2.21-alpha - 2011-01-15
27782 Tor 0.2.2.21-alpha includes all the patches from Tor 0.2.1.29, which
27783 continues our recent code security audit work. The main fix resolves
27784 a remote heap overflow vulnerability that can allow remote code
27785 execution (CVE-2011-0427). Other fixes address a variety of assert
27786 and crash bugs, most of which we think are hard to exploit remotely.
27788 o Major bugfixes (security), also included in 0.2.1.29:
27789 - Fix a heap overflow bug where an adversary could cause heap
27790 corruption. This bug probably allows remote code execution
27791 attacks. Reported by "debuger". Fixes CVE-2011-0427. Bugfix on
27793 - Prevent a denial-of-service attack by disallowing any
27794 zlib-compressed data whose compression factor is implausibly
27795 high. Fixes part of bug 2324; reported by "doorss".
27796 - Zero out a few more keys in memory before freeing them. Fixes
27797 bug 2384 and part of bug 2385. These key instances found by
27798 "cypherpunks", based on Andrew Case's report about being able
27799 to find sensitive data in Tor's memory space if you have enough
27800 permissions. Bugfix on 0.0.2pre9.
27802 o Major bugfixes (crashes), also included in 0.2.1.29:
27803 - Prevent calls to Libevent from inside Libevent log handlers.
27804 This had potential to cause a nasty set of crashes, especially
27805 if running Libevent with debug logging enabled, and running
27806 Tor with a controller watching for low-severity log messages.
27807 Bugfix on 0.1.0.2-rc. Fixes bug 2190.
27808 - Add a check for SIZE_T_MAX to tor_realloc() to try to avoid
27809 underflow errors there too. Fixes the other part of bug 2324.
27810 - Fix a bug where we would assert if we ever had a
27811 cached-descriptors.new file (or another file read directly into
27812 memory) of exactly SIZE_T_CEILING bytes. Fixes bug 2326; bugfix
27813 on 0.2.1.25. Found by doorss.
27814 - Fix some potential asserts and parsing issues with grossly
27815 malformed router caches. Fixes bug 2352; bugfix on Tor 0.2.1.27.
27818 o Minor bugfixes (other), also included in 0.2.1.29:
27819 - Fix a bug with handling misformed replies to reverse DNS lookup
27820 requests in DNSPort. Bugfix on Tor 0.2.0.1-alpha. Related to a
27821 bug reported by doorss.
27822 - Fix compilation on mingw when a pthreads compatibility library
27823 has been installed. (We don't want to use it, so we shouldn't
27824 be including pthread.h.) Fixes bug 2313; bugfix on 0.1.0.1-rc.
27825 - Fix a bug where we would declare that we had run out of virtual
27826 addresses when the address space was only half-exhausted. Bugfix
27828 - Correctly handle the case where AutomapHostsOnResolve is set but
27829 no virtual addresses are available. Fixes bug 2328; bugfix on
27830 0.1.2.1-alpha. Bug found by doorss.
27831 - Correctly handle wrapping around when we run out of virtual
27832 address space. Found by cypherpunks; bugfix on 0.2.0.5-alpha.
27834 o Minor features, also included in 0.2.1.29:
27835 - Update to the January 1 2011 Maxmind GeoLite Country database.
27836 - Introduce output size checks on all of our decryption functions.
27838 o Build changes, also included in 0.2.1.29:
27839 - Tor does not build packages correctly with Automake 1.6 and earlier;
27840 added a check to Makefile.am to make sure that we're building with
27841 Automake 1.7 or later.
27842 - The 0.2.1.28 tarball was missing src/common/OpenBSD_malloc_Linux.c
27843 because we built it with a too-old version of automake. Thus that
27844 release broke ./configure --enable-openbsd-malloc, which is popular
27845 among really fast exit relays on Linux.
27847 o Major bugfixes, new in 0.2.2.21-alpha:
27848 - Prevent crash/heap corruption when the cbtnummodes consensus
27849 parameter is set to 0 or large values. Fixes bug 2317; bugfix
27852 o Major features, new in 0.2.2.21-alpha:
27853 - Introduce minimum/maximum values that clients will believe
27854 from the consensus. Now we'll have a better chance to avoid crashes
27855 or worse when a consensus param has a weird value.
27857 o Minor features, new in 0.2.2.21-alpha:
27858 - Make sure to disable DirPort if running as a bridge. DirPorts aren't
27859 used on bridges, and it makes bridge scanning somewhat easier.
27860 - If writing the state file to disk fails, wait up to an hour before
27861 retrying again, rather than trying again each second. Fixes bug
27862 2346; bugfix on Tor 0.1.1.3-alpha.
27863 - Make Libevent log messages get delivered to controllers later,
27864 and not from inside the Libevent log handler. This prevents unsafe
27865 reentrant Libevent calls while still letting the log messages
27867 - Detect platforms that brokenly use a signed size_t, and refuse to
27868 build there. Found and analyzed by doorss and rransom.
27869 - Fix a bunch of compile warnings revealed by mingw with gcc 4.5.
27872 o Minor bugfixes, new in 0.2.2.21-alpha:
27873 - Handle SOCKS messages longer than 128 bytes long correctly, rather
27874 than waiting forever for them to finish. Fixes bug 2330; bugfix
27875 on 0.2.0.16-alpha. Found by doorss.
27876 - Add assertions to check for overflow in arguments to
27877 base32_encode() and base32_decode(); fix a signed-unsigned
27878 comparison there too. These bugs are not actually reachable in Tor,
27879 but it's good to prevent future errors too. Found by doorss.
27880 - Correctly detect failures to create DNS requests when using Libevent
27881 versions before v2. (Before Libevent 2, we used our own evdns
27882 implementation. Its return values for Libevent's evdns_resolve_*()
27883 functions are not consistent with those from Libevent.) Fixes bug
27884 2363; bugfix on 0.2.2.6-alpha. Found by "lodger".
27886 o Documentation, new in 0.2.2.21-alpha:
27887 - Document the default socks host and port (127.0.0.1:9050) for
27891 Changes in version 0.2.1.29 - 2011-01-15
27892 Tor 0.2.1.29 continues our recent code security audit work. The main
27893 fix resolves a remote heap overflow vulnerability that can allow remote
27894 code execution. Other fixes address a variety of assert and crash bugs,
27895 most of which we think are hard to exploit remotely.
27897 o Major bugfixes (security):
27898 - Fix a heap overflow bug where an adversary could cause heap
27899 corruption. This bug probably allows remote code execution
27900 attacks. Reported by "debuger". Fixes CVE-2011-0427. Bugfix on
27902 - Prevent a denial-of-service attack by disallowing any
27903 zlib-compressed data whose compression factor is implausibly
27904 high. Fixes part of bug 2324; reported by "doorss".
27905 - Zero out a few more keys in memory before freeing them. Fixes
27906 bug 2384 and part of bug 2385. These key instances found by
27907 "cypherpunks", based on Andrew Case's report about being able
27908 to find sensitive data in Tor's memory space if you have enough
27909 permissions. Bugfix on 0.0.2pre9.
27911 o Major bugfixes (crashes):
27912 - Prevent calls to Libevent from inside Libevent log handlers.
27913 This had potential to cause a nasty set of crashes, especially
27914 if running Libevent with debug logging enabled, and running
27915 Tor with a controller watching for low-severity log messages.
27916 Bugfix on 0.1.0.2-rc. Fixes bug 2190.
27917 - Add a check for SIZE_T_MAX to tor_realloc() to try to avoid
27918 underflow errors there too. Fixes the other part of bug 2324.
27919 - Fix a bug where we would assert if we ever had a
27920 cached-descriptors.new file (or another file read directly into
27921 memory) of exactly SIZE_T_CEILING bytes. Fixes bug 2326; bugfix
27922 on 0.2.1.25. Found by doorss.
27923 - Fix some potential asserts and parsing issues with grossly
27924 malformed router caches. Fixes bug 2352; bugfix on Tor 0.2.1.27.
27927 o Minor bugfixes (other):
27928 - Fix a bug with handling misformed replies to reverse DNS lookup
27929 requests in DNSPort. Bugfix on Tor 0.2.0.1-alpha. Related to a
27930 bug reported by doorss.
27931 - Fix compilation on mingw when a pthreads compatibility library
27932 has been installed. (We don't want to use it, so we shouldn't
27933 be including pthread.h.) Fixes bug 2313; bugfix on 0.1.0.1-rc.
27934 - Fix a bug where we would declare that we had run out of virtual
27935 addresses when the address space was only half-exhausted. Bugfix
27937 - Correctly handle the case where AutomapHostsOnResolve is set but
27938 no virtual addresses are available. Fixes bug 2328; bugfix on
27939 0.1.2.1-alpha. Bug found by doorss.
27940 - Correctly handle wrapping around to when we run out of virtual
27941 address space. Found by cypherpunks, bugfix on 0.2.0.5-alpha.
27942 - The 0.2.1.28 tarball was missing src/common/OpenBSD_malloc_Linux.c
27943 because we built it with a too-old version of automake. Thus that
27944 release broke ./configure --enable-openbsd-malloc, which is popular
27945 among really fast exit relays on Linux.
27948 - Update to the January 1 2011 Maxmind GeoLite Country database.
27949 - Introduce output size checks on all of our decryption functions.
27952 - Tor does not build packages correctly with Automake 1.6 and earlier;
27953 added a check to Makefile.am to make sure that we're building with
27954 Automake 1.7 or later.
27957 Changes in version 0.2.2.20-alpha - 2010-12-17
27958 Tor 0.2.2.20-alpha does some code cleanup to reduce the risk of remotely
27959 exploitable bugs. We also fix a variety of other significant bugs,
27960 change the IP address for one of our directory authorities, and update
27961 the minimum version that Tor relays must run to join the network.
27964 - Fix a remotely exploitable bug that could be used to crash instances
27965 of Tor remotely by overflowing on the heap. Remote-code execution
27966 hasn't been confirmed, but can't be ruled out. Everyone should
27967 upgrade. Bugfix on the 0.1.1 series and later.
27968 - Fix a bug that could break accounting on 64-bit systems with large
27969 time_t values, making them hibernate for impossibly long intervals.
27970 Fixes bug 2146. Bugfix on 0.0.9pre6; fix by boboper.
27971 - Fix a logic error in directory_fetches_from_authorities() that
27972 would cause all _non_-exits refusing single-hop-like circuits
27973 to fetch from authorities, when we wanted to have _exits_ fetch
27974 from authorities. Fixes more of 2097. Bugfix on 0.2.2.16-alpha;
27976 - Fix a stream fairness bug that would cause newer streams on a given
27977 circuit to get preference when reading bytes from the origin or
27978 destination. Fixes bug 2210. Fix by Mashael AlSabah. This bug was
27979 introduced before the first Tor release, in svn revision r152.
27981 o Directory authority changes:
27982 - Change IP address and ports for gabelmoo (v3 directory authority).
27985 - Avoid crashes when AccountingMax is set on clients. Fixes bug 2235.
27986 Bugfix on 0.2.2.18-alpha. Diagnosed by boboper.
27987 - Fix an off-by-one error in calculating some controller command
27988 argument lengths. Fortunately, this mistake is harmless since
27989 the controller code does redundant NUL termination too. Found by
27990 boboper. Bugfix on 0.1.1.1-alpha.
27991 - Do not dereference NULL if a bridge fails to build its
27992 extra-info descriptor. Found by an anonymous commenter on
27993 Trac. Bugfix on 0.2.2.19-alpha.
27996 - Update to the December 1 2010 Maxmind GeoLite Country database.
27997 - Directory authorities now reject relays running any versions of
27998 Tor between 0.2.1.3-alpha and 0.2.1.18 inclusive; they have
27999 known bugs that keep RELAY_EARLY cells from working on rendezvous
28000 circuits. Followup to fix for bug 2081.
28001 - Directory authorities now reject relays running any version of Tor
28002 older than 0.2.0.26-rc. That version is the earliest that fetches
28003 current directory information correctly. Fixes bug 2156.
28004 - Report only the top 10 ports in exit-port stats in order not to
28005 exceed the maximum extra-info descriptor length of 50 KB. Implements
28009 Changes in version 0.2.1.28 - 2010-12-17
28010 Tor 0.2.1.28 does some code cleanup to reduce the risk of remotely
28011 exploitable bugs. We also took this opportunity to change the IP address
28012 for one of our directory authorities, and to update the geoip database
28016 - Fix a remotely exploitable bug that could be used to crash instances
28017 of Tor remotely by overflowing on the heap. Remote-code execution
28018 hasn't been confirmed, but can't be ruled out. Everyone should
28019 upgrade. Bugfix on the 0.1.1 series and later.
28021 o Directory authority changes:
28022 - Change IP address and ports for gabelmoo (v3 directory authority).
28025 - Update to the December 1 2010 Maxmind GeoLite Country database.
28028 Changes in version 0.2.1.27 - 2010-11-23
28029 Yet another OpenSSL security patch broke its compatibility with Tor:
28030 Tor 0.2.1.27 makes relays work with openssl 0.9.8p and 1.0.0.b. We
28031 also took this opportunity to fix several crash bugs, integrate a new
28032 directory authority, and update the bundled GeoIP database.
28035 - Resolve an incompatibility with OpenSSL 0.9.8p and OpenSSL 1.0.0b:
28036 No longer set the tlsext_host_name extension on server SSL objects;
28037 but continue to set it on client SSL objects. Our goal in setting
28038 it was to imitate a browser, not a vhosting server. Fixes bug 2204;
28039 bugfix on 0.2.1.1-alpha.
28040 - Do not log messages to the controller while shrinking buffer
28041 freelists. Doing so would sometimes make the controller connection
28042 try to allocate a buffer chunk, which would mess up the internals
28043 of the freelist and cause an assertion failure. Fixes bug 1125;
28044 fixed by Robert Ransom. Bugfix on 0.2.0.16-alpha.
28045 - Learn our external IP address when we're a relay or bridge, even if
28046 we set PublishServerDescriptor to 0. Bugfix on 0.2.0.3-alpha,
28047 where we introduced bridge relays that don't need to publish to
28048 be useful. Fixes bug 2050.
28049 - Do even more to reject (and not just ignore) annotations on
28050 router descriptors received anywhere but from the cache. Previously
28051 we would ignore such annotations at first, but cache them to disk
28052 anyway. Bugfix on 0.2.0.8-alpha. Found by piebeer.
28053 - When you're using bridges and your network goes away and your
28054 bridges get marked as down, recover when you attempt a new socks
28055 connection (if the network is back), rather than waiting up to an
28056 hour to try fetching new descriptors for your bridges. Bugfix on
28057 0.2.0.3-alpha; fixes bug 1981.
28060 - Move to the November 2010 Maxmind GeoLite country db (rather
28061 than the June 2009 ip-to-country GeoIP db) for our statistics that
28062 count how many users relays are seeing from each country. Now we'll
28063 have more accurate data, especially for many African countries.
28065 o New directory authorities:
28066 - Set up maatuska (run by Linus Nordberg) as the eighth v3 directory
28070 - Fix an assertion failure that could occur in directory caches or
28071 bridge users when using a very short voting interval on a testing
28072 network. Diagnosed by Robert Hogan. Fixes bug 1141; bugfix on
28074 - Enforce multiplicity rules when parsing annotations. Bugfix on
28075 0.2.0.8-alpha. Found by piebeer.
28076 - Allow handshaking OR connections to take a full KeepalivePeriod
28077 seconds to handshake. Previously, we would close them after
28078 IDLE_OR_CONN_TIMEOUT (180) seconds, the same timeout as if they
28079 were open. Bugfix on 0.2.1.26; fixes bug 1840. Thanks to mingw-san
28081 - When building with --enable-gcc-warnings on OpenBSD, disable
28082 warnings in system headers. This makes --enable-gcc-warnings
28083 pass on OpenBSD 4.8.
28086 - Exit nodes didn't recognize EHOSTUNREACH as a plausible error code,
28087 and so sent back END_STREAM_REASON_MISC. Clients now recognize a new
28088 stream ending reason for this case: END_STREAM_REASON_NOROUTE.
28089 Servers can start sending this code when enough clients recognize
28090 it. Bugfix on 0.1.0.1-rc; fixes part of bug 1793.
28091 - Build correctly on mingw with more recent versions of OpenSSL 0.9.8.
28092 Patch from mingw-san.
28095 - Remove the old debian/ directory from the main Tor distribution.
28096 The official Tor-for-debian git repository lives at the URL
28097 https://git.torproject.org/debian/tor.git
28098 - Stop shipping the old doc/website/ directory in the tarball. We
28099 changed the website format in late 2010, and what we shipped in
28100 0.2.1.26 really wasn't that useful anyway.
28103 Changes in version 0.2.2.19-alpha - 2010-11-22
28104 Yet another OpenSSL security patch broke its compatibility with Tor:
28105 Tor 0.2.2.19-alpha makes relays work with OpenSSL 0.9.8p and 1.0.0.b.
28108 - Resolve an incompatibility with OpenSSL 0.9.8p and OpenSSL 1.0.0b:
28109 No longer set the tlsext_host_name extension on server SSL objects;
28110 but continue to set it on client SSL objects. Our goal in setting
28111 it was to imitate a browser, not a vhosting server. Fixes bug 2204;
28112 bugfix on 0.2.1.1-alpha.
28115 - Try harder not to exceed the maximum length of 50 KB when writing
28116 statistics to extra-info descriptors. This bug was triggered by very
28117 fast relays reporting exit-port, entry, and dirreq statistics.
28118 Reported by Olaf Selke. Bugfix on 0.2.2.1-alpha. Fixes bug 2183.
28119 - Publish a router descriptor even if generating an extra-info
28120 descriptor fails. Previously we would not publish a router
28121 descriptor without an extra-info descriptor; this can cause fast
28122 exit relays collecting exit-port statistics to drop from the
28123 consensus. Bugfix on 0.1.2.9-rc; fixes bug 2195.
28126 Changes in version 0.2.2.18-alpha - 2010-11-16
28127 Tor 0.2.2.18-alpha fixes several crash bugs that have been nagging
28128 us lately, makes unpublished bridge relays able to detect their IP
28129 address, and fixes a wide variety of other bugs to get us much closer
28130 to a stable release.
28133 - Do even more to reject (and not just ignore) annotations on
28134 router descriptors received anywhere but from the cache. Previously
28135 we would ignore such annotations at first, but cache them to disk
28136 anyway. Bugfix on 0.2.0.8-alpha. Found by piebeer.
28137 - Do not log messages to the controller while shrinking buffer
28138 freelists. Doing so would sometimes make the controller connection
28139 try to allocate a buffer chunk, which would mess up the internals
28140 of the freelist and cause an assertion failure. Fixes bug 1125;
28141 fixed by Robert Ransom. Bugfix on 0.2.0.16-alpha.
28142 - Learn our external IP address when we're a relay or bridge, even if
28143 we set PublishServerDescriptor to 0. Bugfix on 0.2.0.3-alpha,
28144 where we introduced bridge relays that don't need to publish to
28145 be useful. Fixes bug 2050.
28146 - Maintain separate TLS contexts and certificates for incoming and
28147 outgoing connections in bridge relays. Previously we would use the
28148 same TLS contexts and certs for incoming and outgoing connections.
28149 Bugfix on 0.2.0.3-alpha; addresses bug 988.
28150 - Maintain separate identity keys for incoming and outgoing TLS
28151 contexts in bridge relays. Previously we would use the same
28152 identity keys for incoming and outgoing TLS contexts. Bugfix on
28153 0.2.0.3-alpha; addresses the other half of bug 988.
28154 - Avoid an assertion failure when we as an authority receive a
28155 duplicate upload of a router descriptor that we already have,
28156 but which we previously considered an obsolete descriptor.
28157 Fixes another case of bug 1776. Bugfix on 0.2.2.16-alpha.
28158 - Avoid a crash bug triggered by looking at a dangling pointer while
28159 setting the network status consensus. Found by Robert Ransom.
28160 Bugfix on 0.2.2.17-alpha. Fixes bug 2097.
28161 - Fix a logic error where servers that _didn't_ act as exits would
28162 try to keep their server lists more aggressively up to date than
28163 exits, when it was supposed to be the other way around. Bugfix
28166 o Minor bugfixes (on Tor 0.2.1.x and earlier):
28167 - When we're trying to guess whether we know our IP address as
28168 a relay, we would log various ways that we failed to guess
28169 our address, but never log that we ended up guessing it
28170 successfully. Now add a log line to help confused and anxious
28171 relay operators. Bugfix on 0.1.2.1-alpha; fixes bug 1534.
28172 - Bring the logic that gathers routerinfos and assesses the
28173 acceptability of circuits into line. This prevents a Tor OP from
28174 getting locked in a cycle of choosing its local OR as an exit for a
28175 path (due to a .exit request) and then rejecting the circuit because
28176 its OR is not listed yet. It also prevents Tor clients from using an
28177 OR running in the same instance as an exit (due to a .exit request)
28178 if the OR does not meet the same requirements expected of an OR
28179 running elsewhere. Fixes bug 1859; bugfix on 0.1.0.1-rc.
28180 - Correctly describe errors that occur when generating a TLS object.
28181 Previously we would attribute them to a failure while generating a
28182 TLS context. Patch by Robert Ransom. Bugfix on 0.1.0.4-rc; fixes
28184 - Enforce multiplicity rules when parsing annotations. Bugfix on
28185 0.2.0.8-alpha. Found by piebeer.
28186 - Fix warnings that newer versions of autoconf produced during
28187 ./autogen.sh. These warnings appear to be harmless in our case,
28188 but they were extremely verbose. Fixes bug 2020.
28190 o Minor bugfixes (on Tor 0.2.2.x):
28191 - Enable protection of small arrays whenever we build with gcc
28192 hardening features, not only when also building with warnings
28193 enabled. Fixes bug 2031; bugfix on 0.2.2.14-alpha. Reported by keb.
28196 - Make hidden services work better in private Tor networks by not
28197 requiring any uptime to join the hidden service descriptor
28198 DHT. Implements ticket 2088.
28199 - Rate-limit the "your application is giving Tor only an IP address"
28200 warning. Addresses bug 2000; bugfix on 0.0.8pre2.
28201 - When AllowSingleHopExits is set, print a warning to explain to the
28202 relay operator why most clients are avoiding her relay.
28203 - Update to the November 1 2010 Maxmind GeoLite Country database.
28205 o Code simplifications and refactoring:
28206 - When we fixed bug 1038 we had to put in a restriction not to send
28207 RELAY_EARLY cells on rend circuits. This was necessary as long
28208 as relays using Tor 0.2.1.3-alpha through 0.2.1.18-alpha were
28209 active. Now remove this obsolete check. Resolves bug 2081.
28210 - Some options used different conventions for uppercasing of acronyms
28211 when comparing manpage and source. Fix those in favor of the
28212 manpage, as it makes sense to capitalize acronyms.
28213 - Remove the torrc.complete file. It hasn't been kept up to date
28214 and users will have better luck checking out the manpage.
28215 - Remove the obsolete "NoPublish" option; it has been flagged
28216 as obsolete and has produced a warning since 0.1.1.18-rc.
28217 - Remove everything related to building the expert bundle for OS X.
28218 It has confused many users, doesn't work right on OS X 10.6,
28219 and is hard to get rid of once installed. Resolves bug 1274.
28222 Changes in version 0.2.2.17-alpha - 2010-09-30
28223 Tor 0.2.2.17-alpha introduces a feature to make it harder for clients
28224 to use one-hop circuits (which can put the exit relays at higher risk,
28225 plus unbalance the network); fixes a big bug in bandwidth accounting
28226 for relays that want to limit their monthly bandwidth use; fixes a
28227 big pile of bugs in how clients tolerate temporary network failure;
28228 and makes our adaptive circuit build timeout feature (which improves
28229 client performance if your network is fast while not breaking things
28230 if your network is slow) better handle bad networks.
28233 - Exit relays now try harder to block exit attempts from unknown
28234 relays, to make it harder for people to use them as one-hop proxies
28235 a la tortunnel. Controlled by the refuseunknownexits consensus
28236 parameter (currently enabled), or you can override it on your
28237 relay with the RefuseUnknownExits torrc option. Resolves bug 1751.
28239 o Major bugfixes (0.2.1.x and earlier):
28240 - Fix a bug in bandwidth accounting that could make us use twice
28241 the intended bandwidth when our interval start changes due to
28242 daylight saving time. Now we tolerate skew in stored vs computed
28243 interval starts: if the start of the period changes by no more than
28244 50% of the period's duration, we remember bytes that we transferred
28245 in the old period. Fixes bug 1511; bugfix on 0.0.9pre5.
28246 - Always search the Windows system directory for system DLLs, and
28247 nowhere else. Bugfix on 0.1.1.23; fixes bug 1954.
28248 - When you're using bridges and your network goes away and your
28249 bridges get marked as down, recover when you attempt a new socks
28250 connection (if the network is back), rather than waiting up to an
28251 hour to try fetching new descriptors for your bridges. Bugfix on
28252 0.2.0.3-alpha; fixes bug 1981.
28254 o Major bugfixes (on 0.2.2.x):
28255 - Fix compilation on Windows. Bugfix on 0.2.2.16-alpha; related to
28257 - Fix a segfault that could happen when operating a bridge relay with
28258 no GeoIP database set. Fixes bug 1964; bugfix on 0.2.2.15-alpha.
28259 - The consensus bandwidth-weights (used by clients to choose fast
28260 relays) entered an unexpected edge case in September where
28261 Exits were much scarcer than Guards, resulting in bad weight
28262 recommendations. Now we compute them using new constraints that
28263 should succeed in all cases. Also alter directory authorities to
28264 not include the bandwidth-weights line if they fail to produce
28265 valid values. Fixes bug 1952; bugfix on 0.2.2.10-alpha.
28266 - When weighting bridges during path selection, we used to trust
28267 the bandwidths they provided in their descriptor, only capping them
28268 at 10MB/s. This turned out to be problematic for two reasons:
28269 Bridges could claim to handle a lot more traffic then they
28270 actually would, thus making more clients pick them and have a
28271 pretty effective DoS attack. The other issue is that new bridges
28272 that might not have a good estimate for their bw capacity yet
28273 would not get used at all unless no other bridges are available
28274 to a client. Fixes bug 1912; bugfix on 0.2.2.7-alpha.
28276 o Major bugfixes (on the circuit build timeout feature, 0.2.2.x):
28277 - Ignore cannibalized circuits when recording circuit build times.
28278 This should provide for a minor performance improvement for hidden
28279 service users using 0.2.2.14-alpha, and should remove two spurious
28280 notice log messages. Bugfix on 0.2.2.14-alpha; fixes bug 1740.
28281 - Simplify the logic that causes us to decide if the network is
28282 unavailable for purposes of recording circuit build times. If we
28283 receive no cells whatsoever for the entire duration of a circuit's
28284 full measured lifetime, the network is probably down. Also ignore
28285 one-hop directory fetching circuit timeouts when calculating our
28286 circuit build times. These changes should hopefully reduce the
28287 cases where we see ridiculous circuit build timeouts for people
28288 with spotty wireless connections. Fixes part of bug 1772; bugfix
28290 - Prevent the circuit build timeout from becoming larger than
28291 the maximum build time we have ever seen. Also, prevent the time
28292 period for measurement circuits from becoming larger than twice that
28293 value. Fixes the other part of bug 1772; bugfix on 0.2.2.2-alpha.
28296 - When we run out of directory information such that we can't build
28297 circuits, but then get enough that we can build circuits, log when
28298 we actually construct a circuit, so the user has a better chance of
28299 knowing what's going on. Fixes bug 1362.
28300 - Be more generous with how much bandwidth we'd use up (with
28301 accounting enabled) before entering "soft hibernation". Previously,
28302 we'd refuse new connections and circuits once we'd used up 95% of
28303 our allotment. Now, we use up 95% of our allotment, AND make sure
28304 that we have no more than 500MB (or 3 hours of expected traffic,
28305 whichever is lower) remaining before we enter soft hibernation.
28306 - If we've configured EntryNodes and our network goes away and/or all
28307 our entrynodes get marked down, optimistically retry them all when
28308 a new socks application request appears. Fixes bug 1882.
28309 - Add some more defensive programming for architectures that can't
28310 handle unaligned integer accesses. We don't know of any actual bugs
28311 right now, but that's the best time to fix them. Fixes bug 1943.
28312 - Support line continuations in the torrc config file. If a line
28313 ends with a single backslash character, the newline is ignored, and
28314 the configuration value is treated as continuing on the next line.
28317 o Minor bugfixes (on 0.2.1.x and earlier):
28318 - For bandwidth accounting, calculate our expected bandwidth rate
28319 based on the time during which we were active and not in
28320 soft-hibernation during the last interval. Previously, we were
28321 also considering the time spent in soft-hibernation. If this
28322 was a long time, we would wind up underestimating our bandwidth
28323 by a lot, and skewing our wakeup time towards the start of the
28324 accounting interval. Fixes bug 1789. Bugfix on 0.0.9pre5.
28326 o Minor bugfixes (on 0.2.2.x):
28327 - Resume generating CIRC FAILED REASON=TIMEOUT control port messages,
28328 which were disabled by the circuit build timeout changes in
28329 0.2.2.14-alpha. Bugfix on 0.2.2.14-alpha; fixes bug 1739.
28330 - Make sure we don't warn about missing bandwidth weights when
28331 choosing bridges or other relays not in the consensus. Bugfix on
28332 0.2.2.10-alpha; fixes bug 1805.
28333 - In our logs, do not double-report signatures from unrecognized
28334 authorities both as "from unknown authority" and "not
28335 present". Fixes bug 1956, bugfix on 0.2.2.16-alpha.
28338 Changes in version 0.2.2.16-alpha - 2010-09-17
28339 Tor 0.2.2.16-alpha fixes a variety of old stream fairness bugs (most
28340 evident at exit relays), and also continues to resolve all the little
28341 bugs that have been filling up trac lately.
28343 o Major bugfixes (stream-level fairness):
28344 - When receiving a circuit-level SENDME for a blocked circuit, try
28345 to package cells fairly from all the streams that had previously
28346 been blocked on that circuit. Previously, we had started with the
28347 oldest stream, and allowed each stream to potentially exhaust
28348 the circuit's package window. This gave older streams on any
28349 given circuit priority over newer ones. Fixes bug 1937. Detected
28350 originally by Camilo Viecco. This bug was introduced before the
28351 first Tor release, in svn commit r152: it is the new winner of
28352 the longest-lived bug prize.
28353 - When the exit relay got a circuit-level sendme cell, it started
28354 reading on the exit streams, even if had 500 cells queued in the
28355 circuit queue already, so the circuit queue just grew and grew in
28356 some cases. We fix this by not re-enabling reading on receipt of a
28357 sendme cell when the cell queue is blocked. Fixes bug 1653. Bugfix
28358 on 0.2.0.1-alpha. Detected by Mashael AlSabah. Original patch by
28360 - Newly created streams were allowed to read cells onto circuits,
28361 even if the circuit's cell queue was blocked and waiting to drain.
28362 This created potential unfairness, as older streams would be
28363 blocked, but newer streams would gladly fill the queue completely.
28364 We add code to detect this situation and prevent any stream from
28365 getting more than one free cell. Bugfix on 0.2.0.1-alpha. Partially
28369 - Update to the September 1 2010 Maxmind GeoLite Country database.
28370 - Warn when CookieAuthFileGroupReadable is set but CookieAuthFile is
28371 not. This would lead to a cookie that is still not group readable.
28372 Closes bug 1843. Suggested by katmagic.
28373 - When logging a rate-limited warning, we now mention how many messages
28374 got suppressed since the last warning.
28375 - Add new "perconnbwrate" and "perconnbwburst" consensus params to
28376 do individual connection-level rate limiting of clients. The torrc
28377 config options with the same names trump the consensus params, if
28378 both are present. Replaces the old "bwconnrate" and "bwconnburst"
28379 consensus params which were broken from 0.2.2.7-alpha through
28380 0.2.2.14-alpha. Closes bug 1947.
28381 - When a router changes IP address or port, authorities now launch
28382 a new reachability test for it. Implements ticket 1899.
28383 - Make the formerly ugly "2 unknown, 7 missing key, 0 good, 0 bad,
28384 2 no signature, 4 required" messages about consensus signatures
28385 easier to read, and make sure they get logged at the same severity
28386 as the messages explaining which keys are which. Fixes bug 1290.
28387 - Don't warn when we have a consensus that we can't verify because
28388 of missing certificates, unless those certificates are ones
28389 that we have been trying and failing to download. Fixes bug 1145.
28390 - If you configure your bridge with a known identity fingerprint,
28391 and the bridge authority is unreachable (as it is in at least
28392 one country now), fall back to directly requesting the descriptor
28393 from the bridge. Finishes the feature started in 0.2.0.10-alpha;
28395 - When building with --enable-gcc-warnings on OpenBSD, disable
28396 warnings in system headers. This makes --enable-gcc-warnings
28397 pass on OpenBSD 4.8.
28399 o Minor bugfixes (on 0.2.1.x and earlier):
28400 - Authorities will now attempt to download consensuses if their
28401 own efforts to make a live consensus have failed. This change
28402 means authorities that restart will fetch a valid consensus, and
28403 it means authorities that didn't agree with the current consensus
28404 will still fetch and serve it if it has enough signatures. Bugfix
28405 on 0.2.0.9-alpha; fixes bug 1300.
28406 - Ensure DNS requests launched by "RESOLVE" commands from the
28407 controller respect the __LeaveStreamsUnattached setconf options. The
28408 same goes for requests launched via DNSPort or transparent
28409 proxying. Bugfix on 0.2.0.1-alpha; fixes bug 1525.
28410 - Allow handshaking OR connections to take a full KeepalivePeriod
28411 seconds to handshake. Previously, we would close them after
28412 IDLE_OR_CONN_TIMEOUT (180) seconds, the same timeout as if they
28413 were open. Bugfix on 0.2.1.26; fixes bug 1840. Thanks to mingw-san
28415 - Rate-limit "Failed to hand off onionskin" warnings.
28416 - Never relay a cell for a circuit we have already destroyed.
28417 Between marking a circuit as closeable and finally closing it,
28418 it may have been possible for a few queued cells to get relayed,
28419 even though they would have been immediately dropped by the next
28420 OR in the circuit. Fixes bug 1184; bugfix on 0.2.0.1-alpha.
28421 - Never queue a cell for a circuit that's already been marked
28423 - Never vote for a server as "Running" if we have a descriptor for
28424 it claiming to be hibernating, and that descriptor was published
28425 more recently than our last contact with the server. Bugfix on
28426 0.2.0.3-alpha; fixes bug 911.
28427 - Squash a compile warning on OpenBSD. Reported by Tas; fixes
28430 o Minor bugfixes (on 0.2.2.x):
28431 - Fix a regression introduced in 0.2.2.7-alpha that marked relays
28432 down if a directory fetch fails and you've configured either
28433 bridges or EntryNodes. The intent was to mark the relay as down
28434 _unless_ you're using bridges or EntryNodes, since if you are
28435 then you could quickly run out of entry points.
28436 - Fix the Windows directory-listing code. A bug introduced in
28437 0.2.2.14-alpha could make Windows directory servers forget to load
28438 some of their cached v2 networkstatus files.
28439 - Really allow clients to use relays as bridges. Fixes bug 1776;
28440 bugfix on 0.2.2.15-alpha.
28441 - Demote a warn to info that happens when the CellStatistics option
28442 was just enabled. Bugfix on 0.2.2.15-alpha; fixes bug 1921.
28443 Reported by Moritz Bartl.
28444 - On Windows, build correctly either with or without Unicode support.
28445 This is necessary so that Tor can support fringe platforms like
28446 Windows 98 (which has no Unicode), or Windows CE (which has no
28447 non-Unicode). Bugfix on 0.2.2.14-alpha; fixes bug 1797.
28450 - Add a unit test for cross-platform directory-listing code.
28453 Changes in version 0.2.2.15-alpha - 2010-08-18
28454 Tor 0.2.2.15-alpha fixes a big bug in hidden service availability,
28455 fixes a variety of other bugs that were preventing performance
28456 experiments from moving forward, fixes several bothersome memory leaks,
28457 and generally closes a lot of smaller bugs that have been filling up
28461 - Stop assigning the HSDir flag to relays that disable their
28462 DirPort (and thus will refuse to answer directory requests). This
28463 fix should dramatically improve the reachability of hidden services:
28464 hidden services and hidden service clients pick six HSDir relays
28465 to store and retrieve the hidden service descriptor, and currently
28466 about half of the HSDir relays will refuse to work. Bugfix on
28467 0.2.0.10-alpha; fixes part of bug 1693.
28468 - The PerConnBWRate and Burst config options, along with the
28469 bwconnrate and bwconnburst consensus params, initialized each conn's
28470 token bucket values only when the connection is established. Now we
28471 update them if the config options change, and update them every time
28472 we get a new consensus. Otherwise we can encounter an ugly edge
28473 case where we initialize an OR conn to client-level bandwidth,
28474 but then later the relay joins the consensus and we leave it
28475 throttled. Bugfix on 0.2.2.7-alpha; fixes bug 1830.
28476 - Fix a regression that caused Tor to rebind its ports if it receives
28477 SIGHUP while hibernating. Bugfix in 0.1.1.6-alpha; closes bug 919.
28480 - Lower the maximum weighted-fractional-uptime cutoff to 98%. This
28481 should give us approximately 40-50% more Guard-flagged nodes,
28482 improving the anonymity the Tor network can provide and also
28483 decreasing the dropoff in throughput that relays experience when
28484 they first get the Guard flag.
28485 - Allow enabling or disabling the *Statistics config options while
28489 - Update to the August 1 2010 Maxmind GeoLite Country database.
28490 - Have the controller interface give a more useful message than
28491 "Internal Error" in response to failed GETINFO requests.
28492 - Warn when the same option is provided more than once in a torrc
28493 file, on the command line, or in a single SETCONF statement, and
28494 the option is one that only accepts a single line. Closes bug 1384.
28495 - Build correctly on mingw with more recent versions of OpenSSL 0.9.8.
28496 Patch from mingw-san.
28497 - Add support for the country code "{??}" in torrc options like
28498 ExcludeNodes, to indicate all routers of unknown country. Closes
28500 - Relays report the number of bytes spent on answering directory
28501 requests in extra-info descriptors similar to {read,write}-history.
28502 Implements enhancement 1790.
28504 o Minor bugfixes (on 0.2.1.x and earlier):
28505 - Complain if PublishServerDescriptor is given multiple arguments that
28506 include 0 or 1. This configuration will be rejected in the future.
28507 Bugfix on 0.2.0.1-alpha; closes bug 1107.
28508 - Disallow BridgeRelay 1 and ORPort 0 at once in the configuration.
28509 Bugfix on 0.2.0.13-alpha; closes bug 928.
28510 - Change "Application request when we're believed to be offline."
28511 notice to "Application request when we haven't used client
28512 functionality lately.", to clarify that it's not an error. Bugfix
28513 on 0.0.9.3; fixes bug 1222.
28514 - Fix a bug in the controller interface where "GETINFO ns/asdaskljkl"
28515 would return "551 Internal error" rather than "552 Unrecognized key
28516 ns/asdaskljkl". Bugfix on 0.1.2.3-alpha.
28517 - Users can't configure a regular relay to be their bridge. It didn't
28518 work because when Tor fetched the bridge descriptor, it found
28519 that it already had it, and didn't realize that the purpose of the
28520 descriptor had changed. Now we replace routers with a purpose other
28521 than bridge with bridge descriptors when fetching them. Bugfix on
28522 0.1.1.9-alpha. Bug 1776 not yet fixed because now we immediately
28523 refetch the descriptor with router purpose 'general', disabling
28525 - Fix a rare bug in rend_fn unit tests: we would fail a test when
28526 a randomly generated port is 0. Diagnosed by Matt Edman. Bugfix
28527 on 0.2.0.10-alpha; fixes bug 1808.
28528 - Exit nodes didn't recognize EHOSTUNREACH as a plausible error code,
28529 and so sent back END_STREAM_REASON_MISC. Clients now recognize a new
28530 stream ending reason for this case: END_STREAM_REASON_NOROUTE.
28531 Servers can start sending this code when enough clients recognize
28532 it. Also update the spec to reflect this new reason. Bugfix on
28533 0.1.0.1-rc; fixes part of bug 1793.
28534 - Delay geoip stats collection by bridges for 6 hours, not 2 hours,
28535 when we switch from being a public relay to a bridge. Otherwise
28536 there will still be clients that see the relay in their consensus,
28537 and the stats will end up wrong. Bugfix on 0.2.1.15-rc; fixes bug
28539 - Instead of giving an assertion failure on an internal mismatch
28540 on estimated freelist size, just log a BUG warning and try later.
28541 Mitigates but does not fix bug 1125.
28542 - Fix an assertion failure that could occur in caches or bridge users
28543 when using a very short voting interval on a testing network.
28544 Diagnosed by Robert Hogan. Fixes bug 1141; bugfix on 0.2.0.8-alpha.
28546 o Minor bugfixes (on 0.2.2.x):
28547 - Alter directory authorities to always consider Exit-flagged nodes
28548 as potential Guard nodes in their votes. The actual decision to
28549 use Exits as Guards is done in the consensus bandwidth weights.
28550 Fixes bug 1294; bugfix on 0.2.2.10-alpha.
28551 - When the controller is reporting the purpose of circuits that
28552 didn't finish building before the circuit build timeout, it was
28553 printing UNKNOWN_13. Now print EXPIRED. Bugfix on 0.2.2.14-alpha.
28554 - Our libevent version parsing code couldn't handle versions like
28555 1.4.14b-stable and incorrectly warned the user about using an
28556 old and broken version of libevent. Treat 1.4.14b-stable like
28557 1.4.14-stable when parsing the version. Fixes bug 1731; bugfix
28559 - Don't use substitution references like $(VAR:MOD) when
28560 $(asciidoc_files) is empty -- make(1) on NetBSD transforms
28561 '$(:x)' to 'x' rather than the empty string. This bites us in
28562 doc/ when configured with --disable-asciidoc. Bugfix on
28563 0.2.2.9-alpha; fixes bug 1773.
28564 - Remove a spurious hidden service server-side log notice about
28565 "Ancient non-dirty circuits". Bugfix on 0.2.2.14-alpha; fixes
28567 - Fix compilation with --with-dmalloc set. Bugfix on 0.2.2.6-alpha;
28569 - Correctly report written bytes on linked connections. Found while
28570 implementing 1790. Bugfix on 0.2.2.4-alpha.
28571 - Fix three memory leaks: one in circuit_build_times_parse_state(),
28572 one in dirvote_add_signatures_to_pending_consensus(), and one every
28573 time we parse a v3 network consensus. Bugfixes on 0.2.2.14-alpha,
28574 0.2.2.6-alpha, and 0.2.2.10-alpha respectively; fixes bug 1831.
28576 o Code simplifications and refactoring:
28577 - Take a first step towards making or.h smaller by splitting out
28578 function definitions for all source files in src/or/. Leave
28579 structures and defines in or.h for now.
28580 - Remove a bunch of unused function declarations as well as a block of
28581 #if 0'd code from the unit tests. Closes bug 1824.
28582 - New unit tests for exit-port history statistics; refactored exit
28583 statistics code to be more easily tested.
28584 - Remove the old debian/ directory from the main Tor distribution.
28585 The official Tor-for-debian git repository lives at the URL
28586 https://git.torproject.org/debian/tor.git
28589 Changes in version 0.2.2.14-alpha - 2010-07-12
28590 Tor 0.2.2.14-alpha greatly improves client-side handling of
28591 circuit build timeouts, which are used to estimate speed and improve
28592 performance. We also move to a much better GeoIP database, port Tor to
28593 Windows CE, introduce new compile flags that improve code security,
28594 add an eighth v3 directory authority, and address a lot of more
28598 - Tor directory authorities no longer crash when started with a
28599 cached-microdesc-consensus file in their data directory. Bugfix
28600 on 0.2.2.6-alpha; fixes bug 1532.
28601 - Treat an unset $HOME like an empty $HOME rather than triggering an
28602 assert. Bugfix on 0.0.8pre1; fixes bug 1522.
28603 - Ignore negative and large circuit build timeout values that can
28604 happen during a suspend or hibernate. These values caused various
28605 asserts to fire. Bugfix on 0.2.2.2-alpha; fixes bug 1245.
28606 - Alter calculation of Pareto distribution parameter 'Xm' for
28607 Circuit Build Timeout learning to use the weighted average of the
28608 top N=3 modes (because we have three entry guards). Considering
28609 multiple modes should improve the timeout calculation in some cases,
28610 and prevent extremely high timeout values. Bugfix on 0.2.2.2-alpha;
28612 - Alter calculation of Pareto distribution parameter 'Alpha' to use a
28613 right censored distribution model. This approach improves over the
28614 synthetic timeout generation approach that was producing insanely
28615 high timeout values. Now we calculate build timeouts using truncated
28616 times. Bugfix on 0.2.2.2-alpha; fixes bugs 1245 and 1335.
28617 - Do not close circuits that are under construction when they reach
28618 the circuit build timeout. Instead, leave them building (but do not
28619 use them) for up until the time corresponding to the 95th percentile
28620 on the Pareto CDF or 60 seconds, whichever is greater. This is done
28621 to provide better data for the new Pareto model. This percentile
28622 can be controlled by the consensus.
28625 - Move to the June 2010 Maxmind GeoLite country db (rather than the
28626 June 2009 ip-to-country GeoIP db) for our statistics that count
28627 how many users relays are seeing from each country. Now we have
28628 more accurate data for many African countries.
28629 - Port Tor to build and run correctly on Windows CE systems, using
28630 the wcecompat library. Contributed by Valerio Lupi.
28631 - New "--enable-gcc-hardening" ./configure flag (off by default)
28632 to turn on gcc compile time hardening options. It ensures
28633 that signed ints have defined behavior (-fwrapv), enables
28634 -D_FORTIFY_SOURCE=2 (requiring -O2), adds stack smashing protection
28635 with canaries (-fstack-protector-all), turns on ASLR protection if
28636 supported by the kernel (-fPIE, -pie), and adds additional security
28637 related warnings. Verified to work on Mac OS X and Debian Lenny.
28638 - New "--enable-linker-hardening" ./configure flag (off by default)
28639 to turn on ELF specific hardening features (relro, now). This does
28640 not work with Mac OS X or any other non-ELF binary format.
28642 o New directory authorities:
28643 - Set up maatuska (run by Linus Nordberg) as the eighth v3 directory
28647 - New config option "WarnUnsafeSocks 0" disables the warning that
28648 occurs whenever Tor receives a socks handshake using a version of
28649 the socks protocol that can only provide an IP address (rather
28650 than a hostname). Setups that do DNS locally over Tor are fine,
28651 and we shouldn't spam the logs in that case.
28652 - Convert the HACKING file to asciidoc, and add a few new sections
28653 to it, explaining how we use Git, how we make changelogs, and
28654 what should go in a patch.
28655 - Add a TIMEOUT_RATE keyword to the BUILDTIMEOUT_SET control port
28656 event, to give information on the current rate of circuit timeouts
28657 over our stored history.
28658 - Add ability to disable circuit build time learning via consensus
28659 parameter and via a LearnCircuitBuildTimeout config option. Also
28660 automatically disable circuit build time calculation if we are
28661 either a AuthoritativeDirectory, or if we fail to write our state
28662 file. Fixes bug 1296.
28663 - More gracefully handle corrupt state files, removing asserts
28664 in favor of saving a backup and resetting state.
28665 - Rename the "log.h" header to "torlog.h" so as to conflict with fewer
28669 - Build correctly on OSX with zlib 1.2.4 and higher with all warnings
28671 - When a2x fails, mention that the user could disable manpages instead
28672 of trying to fix their asciidoc installation.
28673 - Where available, use Libevent 2.0's periodic timers so that our
28674 once-per-second cleanup code gets called even more closely to
28675 once per second than it would otherwise. Fixes bug 943.
28676 - If you run a bridge that listens on multiple IP addresses, and
28677 some user configures a bridge address that uses a different IP
28678 address than your bridge writes in its router descriptor, and the
28679 user doesn't specify an identity key, their Tor would discard the
28680 descriptor because "it isn't one of our configured bridges", and
28681 fail to bootstrap. Now believe the descriptor and bootstrap anyway.
28682 Bugfix on 0.2.0.3-alpha.
28683 - If OpenSSL fails to make a duplicate of a private or public key, log
28684 an error message and try to exit cleanly. May help with debugging
28685 if bug 1209 ever remanifests.
28686 - Save a couple bytes in memory allocation every time we escape
28687 certain characters in a string. Patch from Florian Zumbiehl.
28688 - Make it explicit that we don't cannibalize one-hop circuits. This
28689 happens in the wild, but doesn't turn out to be a problem because
28690 we fortunately don't use those circuits. Many thanks to outofwords
28691 for the initial analysis and to swissknife who confirmed that
28692 two-hop circuits are actually created.
28693 - Make directory mirrors report non-zero dirreq-v[23]-shares again.
28694 Fixes bug 1564; bugfix on 0.2.2.9-alpha.
28695 - Eliminate a case where a circuit build time warning was displayed
28696 after network connectivity resumed. Bugfix on 0.2.2.2-alpha.
28699 Changes in version 0.2.1.26 - 2010-05-02
28700 Tor 0.2.1.26 addresses the recent connection and memory overload
28701 problems we've been seeing on relays, especially relays with their
28702 DirPort open. If your relay has been crashing, or you turned it off
28703 because it used too many resources, give this release a try.
28705 This release also fixes yet another instance of broken OpenSSL libraries
28706 that was causing some relays to drop out of the consensus.
28709 - Teach relays to defend themselves from connection overload. Relays
28710 now close idle circuits early if it looks like they were intended
28711 for directory fetches. Relays are also more aggressive about closing
28712 TLS connections that have no circuits on them. Such circuits are
28713 unlikely to be re-used, and tens of thousands of them were piling
28714 up at the fast relays, causing the relays to run out of sockets
28715 and memory. Bugfix on 0.2.0.22-rc (where clients started tunneling
28716 their directory fetches over TLS).
28717 - Fix SSL renegotiation behavior on OpenSSL versions like on Centos
28718 that claim to be earlier than 0.9.8m, but which have in reality
28719 backported huge swaths of 0.9.8m or 0.9.8n renegotiation
28720 behavior. Possible fix for some cases of bug 1346.
28721 - Directory mirrors were fetching relay descriptors only from v2
28722 directory authorities, rather than v3 authorities like they should.
28723 Only 2 v2 authorities remain (compared to 7 v3 authorities), leading
28724 to a serious bottleneck. Bugfix on 0.2.0.9-alpha. Fixes bug 1324.
28727 - Finally get rid of the deprecated and now harmful notion of "clique
28728 mode", where directory authorities maintain TLS connections to
28732 - In the util/threads test, no longer free the test_mutex before all
28733 worker threads have finished. Bugfix on 0.2.1.6-alpha.
28734 - The master thread could starve the worker threads quite badly on
28735 certain systems, causing them to run only partially in the allowed
28736 window. This resulted in test failures. Now the master thread sleeps
28737 occasionally for a few microseconds while the two worker-threads
28738 compete for the mutex. Bugfix on 0.2.0.1-alpha.
28741 Changes in version 0.2.2.13-alpha - 2010-04-24
28742 Tor 0.2.2.13-alpha addresses the recent connection and memory overload
28743 problems we've been seeing on relays, especially relays with their
28744 DirPort open. If your relay has been crashing, or you turned it off
28745 because it used too many resources, give this release a try.
28748 - Teach relays to defend themselves from connection overload. Relays
28749 now close idle circuits early if it looks like they were intended
28750 for directory fetches. Relays are also more aggressive about closing
28751 TLS connections that have no circuits on them. Such circuits are
28752 unlikely to be re-used, and tens of thousands of them were piling
28753 up at the fast relays, causing the relays to run out of sockets
28754 and memory. Bugfix on 0.2.0.22-rc (where clients started tunneling
28755 their directory fetches over TLS).
28758 - Finally get rid of the deprecated and now harmful notion of "clique
28759 mode", where directory authorities maintain TLS connections to
28761 - Directory authorities now do an immediate reachability check as soon
28762 as they hear about a new relay. This change should slightly reduce
28763 the time between setting up a relay and getting listed as running
28764 in the consensus. It should also improve the time between setting
28765 up a bridge and seeing use by bridge users.
28766 - Directory authorities no longer launch a TLS connection to every
28767 relay as they startup. Now that we have 2k+ descriptors cached,
28768 the resulting network hiccup is becoming a burden. Besides,
28769 authorities already avoid voting about Running for the first half
28770 hour of their uptime.
28773 Changes in version 0.2.2.12-alpha - 2010-04-20
28774 Tor 0.2.2.12-alpha fixes a critical bug in how directory authorities
28775 handle and vote on descriptors. It was causing relays to drop out of
28779 - Many relays have been falling out of the consensus lately because
28780 not enough authorities know about their descriptor for them to get
28781 a majority of votes. When we deprecated the v2 directory protocol,
28782 we got rid of the only way that v3 authorities can hear from each
28783 other about other descriptors. Now authorities examine every v3
28784 vote for new descriptors, and fetch them from that authority. Bugfix
28786 - Fix two typos in tor_vasprintf() that broke the compile on Windows,
28787 and a warning in or.h related to bandwidth_weight_rule_t that
28788 prevented clean compile on OS X. Fixes bug 1363; bugfix on
28790 - Fix a segfault on relays when DirReqStatistics is enabled
28791 and 24 hours pass. Bug found by keb. Fixes bug 1365; bugfix on
28795 - Demote a confusing TLS warning that relay operators might get when
28796 someone tries to talk to their OrPort. It is neither the operator's
28797 fault nor can they do anything about it. Fixes bug 1364; bugfix
28801 Changes in version 0.2.2.11-alpha - 2010-04-15
28802 Tor 0.2.2.11-alpha fixes yet another instance of broken OpenSSL
28803 libraries that was causing some relays to drop out of the consensus.
28806 - Directory mirrors were fetching relay descriptors only from v2
28807 directory authorities, rather than v3 authorities like they should.
28808 Only 2 v2 authorities remain (compared to 7 v3 authorities), leading
28809 to a serious bottleneck. Bugfix on 0.2.0.9-alpha. Fixes bug 1324.
28810 - Fix a parsing error that made every possible value of
28811 CircPriorityHalflifeMsec get treated as "1 msec". Bugfix
28812 on 0.2.2.7-alpha. Rename CircPriorityHalflifeMsec to
28813 CircuitPriorityHalflifeMsec, so authorities can tell newer relays
28814 about the option without breaking older ones.
28815 - Fix SSL renegotiation behavior on OpenSSL versions like on Centos
28816 that claim to be earlier than 0.9.8m, but which have in reality
28817 backported huge swaths of 0.9.8m or 0.9.8n renegotiation
28818 behavior. Possible fix for some cases of bug 1346.
28821 - Experiment with a more aggressive approach to preventing clients
28822 from making one-hop exit streams. Exit relays who want to try it
28823 out can set "RefuseUnknownExits 1" in their torrc, and then look
28824 for "Attempt by %s to open a stream" log messages. Let us know
28826 - Add support for statically linking zlib by specifying
28827 --enable-static-zlib, to go with our support for statically linking
28828 openssl and libevent. Resolves bug 1358.
28831 - Fix a segfault that happens whenever a Tor client that is using
28832 libevent2's bufferevents gets a hup signal. Bugfix on 0.2.2.5-alpha;
28834 - When we cleaned up the contrib/tor-exit-notice.html file, we left
28835 out the first line. Fixes bug 1295.
28836 - When building the manpage from a tarball, we required asciidoc, but
28837 the asciidoc -> roff/html conversion was already done for the
28838 tarball. Make 'make' complain only when we need asciidoc (either
28839 because we're compiling directly from git, or because we altered
28840 the asciidoc manpage in the tarball). Bugfix on 0.2.2.9-alpha.
28841 - When none of the directory authorities vote on any params, Tor
28842 segfaulted when trying to make the consensus from the votes. We
28843 didn't trigger the bug in practice, because authorities do include
28844 params in their votes. Bugfix on 0.2.2.10-alpha; fixes bug 1322.
28847 - In the util/threads test, no longer free the test_mutex before all
28848 worker threads have finished. Bugfix on 0.2.1.6-alpha.
28849 - The master thread could starve the worker threads quite badly on
28850 certain systems, causing them to run only partially in the allowed
28851 window. This resulted in test failures. Now the master thread sleeps
28852 occasionally for a few microseconds while the two worker-threads
28853 compete for the mutex. Bugfix on 0.2.0.1-alpha.
28856 Changes in version 0.2.2.10-alpha - 2010-03-07
28857 Tor 0.2.2.10-alpha fixes a regression introduced in 0.2.2.9-alpha that
28858 could prevent relays from guessing their IP address correctly. It also
28859 starts the groundwork for another client-side performance boost, since
28860 currently we're not making efficient use of relays that have both the
28861 Guard flag and the Exit flag.
28864 - Fix a regression from our patch for bug 1244 that caused relays
28865 to guess their IP address incorrectly if they didn't set Address
28866 in their torrc and/or their address fails to resolve. Bugfix on
28867 0.2.2.9-alpha; fixes bug 1269.
28869 o Major features (performance):
28870 - Directory authorities now compute consensus weightings that instruct
28871 clients how to weight relays flagged as Guard, Exit, Guard+Exit,
28872 and no flag. Clients that use these weightings will distribute
28873 network load more evenly across these different relay types. The
28874 weightings are in the consensus so we can change them globally in
28875 the future. Extra thanks to "outofwords" for finding some nasty
28876 security bugs in the first implementation of this feature.
28878 o Minor features (performance):
28879 - Always perform router selections using weighted relay bandwidth,
28880 even if we don't need a high capacity circuit at the time. Non-fast
28881 circuits now only differ from fast ones in that they can use relays
28882 not marked with the Fast flag. This "feature" could turn out to
28883 be a horrible bug; we should investigate more before it goes into
28887 - Allow disabling building of the manpages. Skipping the manpage
28888 speeds up the build considerably.
28890 o Minor bugfixes (on 0.2.2.x):
28891 - Fix a memleak in the EXTENDCIRCUIT logic. Spotted by coverity.
28892 Bugfix on 0.2.2.9-alpha.
28893 - Disallow values larger than INT32_MAX for PerConnBWRate|Burst
28894 config option. Bugfix on 0.2.2.7-alpha.
28895 - Ship the asciidoc-helper file in the tarball, so that people can
28896 build from source if they want to, and touching the .1.txt files
28897 doesn't break the build. Bugfix on 0.2.2.9-alpha.
28899 o Minor bugfixes (on 0.2.1.x or earlier):
28900 - Fix a dereference-then-NULL-check sequence when publishing
28901 descriptors. Bugfix on 0.2.1.5-alpha. Discovered by ekir; fixes
28903 - Fix another dereference-then-NULL-check sequence. Bugfix on
28904 0.2.1.14-rc. Discovered by ekir; fixes bug 1256.
28905 - Make sure we treat potentially not NUL-terminated strings correctly.
28906 Bugfix on 0.1.1.13-alpha. Discovered by rieo; fixes bug 1257.
28908 o Code simplifications and refactoring:
28909 - Fix some urls in the exit notice file and make it XHTML1.1 strict
28910 compliant. Based on a patch from Christian Kujau.
28911 - Don't use sed in asciidoc-helper anymore.
28912 - Make the build process fail if asciidoc cannot be found and
28913 building with asciidoc isn't disabled.
28916 Changes in version 0.2.2.9-alpha - 2010-02-22
28917 Tor 0.2.2.9-alpha makes Tor work again on the latest OS X, updates the
28918 location of a directory authority, and cleans up a bunch of small bugs.
28920 o Directory authority changes:
28921 - Change IP address for dannenberg (v3 directory authority), and
28922 remove moria2 (obsolete v1, v2 directory authority and v0 hidden
28923 service directory authority) from the list.
28926 - Make Tor work again on the latest OS X: when deciding whether to
28927 use strange flags to turn TLS renegotiation on, detect the OpenSSL
28928 version at run-time, not compile time. We need to do this because
28929 Apple doesn't update its dev-tools headers when it updates its
28930 libraries in a security patch.
28931 - Fix a potential buffer overflow in lookup_last_hid_serv_request()
28932 that could happen on 32-bit platforms with 64-bit time_t. Also fix
28933 a memory leak when requesting a hidden service descriptor we've
28934 requested before. Fixes bug 1242, bugfix on 0.2.0.18-alpha. Found
28936 - Authorities could be tricked into giving out the Exit flag to relays
28937 that didn't allow exiting to any ports. This bug could screw
28938 with load balancing and stats. Bugfix on 0.1.1.6-alpha; fixes bug
28939 1238. Bug discovered by Martin Kowalczyk.
28940 - When freeing a session key, zero it out completely. We only zeroed
28941 the first ptrsize bytes. Bugfix on 0.0.2pre8. Discovered and
28942 patched by ekir. Fixes bug 1254.
28945 - Fix static compilation by listing the openssl libraries in the right
28946 order. Bugfix on Tor 0.2.2.8-alpha; fixes bug 1237.
28947 - Resume handling .exit hostnames in a special way: originally we
28948 stripped the .exit part and used the requested exit relay. In
28949 0.2.2.1-alpha we stopped treating them in any special way, meaning
28950 if you use a .exit address then Tor will pass it on to the exit
28951 relay. Now we reject the .exit stream outright, since that behavior
28952 might be more expected by the user. Found and diagnosed by Scott
28953 Bennett and Downie on or-talk.
28954 - Don't spam the controller with events when we have no file
28955 descriptors available. Bugfix on 0.2.1.5-alpha. (Rate-limiting
28956 for log messages was already solved from bug 748.)
28957 - Avoid a bogus overlapped memcpy in tor_addr_copy(). Reported by
28959 - Make the DNSPort option work with libevent 2.x. Don't alter the
28960 behavior for libevent 1.x. Fixes bug 1143. Found by SwissTorExit.
28961 - Emit a GUARD DROPPED controller event for a case we missed.
28962 - Make more fields in the controller protocol case-insensitive, since
28963 control-spec.txt said they were.
28964 - Refactor resolve_my_address() to not use gethostbyname() anymore.
28965 Fixes bug 1244; bugfix on 0.0.2pre25. Reported by Mike Mestnik.
28966 - Fix a spec conformance issue: the network-status-version token
28967 must be the first token in a v3 consensus or vote. Discovered by
28968 parakeep. Bugfix on 0.2.0.3-alpha.
28970 o Code simplifications and refactoring:
28971 - Generate our manpage and HTML documentation using Asciidoc. This
28972 change should make it easier to maintain the documentation, and
28973 produce nicer HTML.
28974 - Remove the --enable-iphone option. According to reports from Marco
28975 Bonetti, Tor builds fine without any special tweaking on recent
28976 iPhone SDK versions.
28977 - Removed some unnecessary files from the source distribution. The
28978 AUTHORS file has now been merged into the people page on the
28979 website. The roadmaps and design doc can now be found in the
28980 projects directory in svn.
28981 - Enabled various circuit build timeout constants to be controlled
28982 by consensus parameters. Also set better defaults for these
28983 parameters based on experimentation on broadband and simulated
28984 high latency links.
28987 - The 'EXTENDCIRCUIT' control port command can now be used with
28988 a circ id of 0 and no path. This feature will cause Tor to build
28989 a new 'fast' general purpose circuit using its own path selection
28991 - Added a BUILDTIMEOUT_SET controller event to describe changes
28992 to the circuit build timeout.
28993 - Future-proof the controller protocol a bit by ignoring keyword
28994 arguments we do not recognize.
28995 - Expand homedirs passed to tor-checkkey. This should silence a
28996 coverity complaint about passing a user-supplied string into
28997 open() without checking it.
29000 Changes in version 0.2.1.25 - 2010-03-16
29001 Tor 0.2.1.25 fixes a regression introduced in 0.2.1.23 that could
29002 prevent relays from guessing their IP address correctly. It also fixes
29003 several minor potential security bugs.
29006 - Fix a regression from our patch for bug 1244 that caused relays
29007 to guess their IP address incorrectly if they didn't set Address
29008 in their torrc and/or their address fails to resolve. Bugfix on
29009 0.2.1.23; fixes bug 1269.
29010 - When freeing a session key, zero it out completely. We only zeroed
29011 the first ptrsize bytes. Bugfix on 0.0.2pre8. Discovered and
29012 patched by ekir. Fixes bug 1254.
29015 - Fix a dereference-then-NULL-check sequence when publishing
29016 descriptors. Bugfix on 0.2.1.5-alpha. Discovered by ekir; fixes
29018 - Fix another dereference-then-NULL-check sequence. Bugfix on
29019 0.2.1.14-rc. Discovered by ekir; fixes bug 1256.
29020 - Make sure we treat potentially not NUL-terminated strings correctly.
29021 Bugfix on 0.1.1.13-alpha. Discovered by rieo; fixes bug 1257.
29025 Changes in version 0.2.1.24 - 2010-02-21
29026 Tor 0.2.1.24 makes Tor work again on the latest OS X -- this time
29030 - Work correctly out-of-the-box with even more vendor-patched versions
29031 of OpenSSL. In particular, make it so Debian and OS X don't need
29032 customized patches to run/build.
29035 Changes in version 0.2.1.23 - 2010-02-13
29036 Tor 0.2.1.23 fixes a huge client-side performance bug, makes Tor work
29037 again on the latest OS X, and updates the location of a directory
29040 o Major bugfixes (performance):
29041 - We were selecting our guards uniformly at random, and then weighting
29042 which of our guards we'd use uniformly at random. This imbalance
29043 meant that Tor clients were severely limited on throughput (and
29044 probably latency too) by the first hop in their circuit. Now we
29045 select guards weighted by currently advertised bandwidth. We also
29046 automatically discard guards picked using the old algorithm. Fixes
29047 bug 1217; bugfix on 0.2.1.3-alpha. Found by Mike Perry.
29050 - Make Tor work again on the latest OS X: when deciding whether to
29051 use strange flags to turn TLS renegotiation on, detect the OpenSSL
29052 version at run-time, not compile time. We need to do this because
29053 Apple doesn't update its dev-tools headers when it updates its
29054 libraries in a security patch.
29055 - Fix a potential buffer overflow in lookup_last_hid_serv_request()
29056 that could happen on 32-bit platforms with 64-bit time_t. Also fix
29057 a memory leak when requesting a hidden service descriptor we've
29058 requested before. Fixes bug 1242, bugfix on 0.2.0.18-alpha. Found
29061 o Directory authority changes:
29062 - Change IP address for dannenberg (v3 directory authority), and
29063 remove moria2 (obsolete v1, v2 directory authority and v0 hidden
29064 service directory authority) from the list.
29067 - Refactor resolve_my_address() to not use gethostbyname() anymore.
29068 Fixes bug 1244; bugfix on 0.0.2pre25. Reported by Mike Mestnik.
29071 - Avoid a mad rush at the beginning of each month when each client
29072 rotates half of its guards. Instead we spread the rotation out
29073 throughout the month, but we still avoid leaving a precise timestamp
29074 in the state file about when we first picked the guard. Improves
29075 over the behavior introduced in 0.1.2.17.
29078 Changes in version 0.2.2.8-alpha - 2010-01-26
29079 Tor 0.2.2.8-alpha fixes a crash bug in 0.2.2.7-alpha that has been
29080 causing bridge relays to disappear. If you're running a bridge,
29084 - Fix a memory corruption bug on bridges that occurred during the
29085 inclusion of stats data in extra-info descriptors. Also fix the
29086 interface for geoip_get_bridge_stats* to prevent similar bugs in
29087 the future. Diagnosis by Tas, patch by Karsten and Sebastian.
29088 Fixes bug 1208; bugfix on 0.2.2.7-alpha.
29091 - Ignore OutboundBindAddress when connecting to localhost.
29092 Connections to localhost need to come _from_ localhost, or else
29093 local servers (like DNS and outgoing HTTP/SOCKS proxies) will often
29097 Changes in version 0.2.2.7-alpha - 2010-01-19
29098 Tor 0.2.2.7-alpha fixes a huge client-side performance bug, as well
29099 as laying the groundwork for further relay-side performance fixes. It
29100 also starts cleaning up client behavior with respect to the EntryNodes,
29101 ExitNodes, and StrictNodes config options.
29103 This release also rotates two directory authority keys, due to a
29104 security breach of some of the Torproject servers.
29106 o Directory authority changes:
29107 - Rotate keys (both v3 identity and relay identity) for moria1
29110 o Major features (performance):
29111 - We were selecting our guards uniformly at random, and then weighting
29112 which of our guards we'd use uniformly at random. This imbalance
29113 meant that Tor clients were severely limited on throughput (and
29114 probably latency too) by the first hop in their circuit. Now we
29115 select guards weighted by currently advertised bandwidth. We also
29116 automatically discard guards picked using the old algorithm. Fixes
29117 bug 1217; bugfix on 0.2.1.3-alpha. Found by Mike Perry.
29118 - When choosing which cells to relay first, relays can now favor
29119 circuits that have been quiet recently, to provide lower latency
29120 for low-volume circuits. By default, relays enable or disable this
29121 feature based on a setting in the consensus. You can override
29122 this default by using the new "CircuitPriorityHalflife" config
29123 option. Design and code by Ian Goldberg, Can Tang, and Chris
29125 - Add separate per-conn write limiting to go with the per-conn read
29126 limiting. We added a global write limit in Tor 0.1.2.5-alpha,
29127 but never per-conn write limits.
29128 - New consensus params "bwconnrate" and "bwconnburst" to let us
29129 rate-limit client connections as they enter the network. It's
29130 controlled in the consensus so we can turn it on and off for
29131 experiments. It's starting out off. Based on proposal 163.
29133 o Major features (relay selection options):
29134 - Switch to a StrictNodes config option, rather than the previous
29135 "StrictEntryNodes" / "StrictExitNodes" separation that was missing a
29136 "StrictExcludeNodes" option.
29137 - If EntryNodes, ExitNodes, ExcludeNodes, or ExcludeExitNodes
29138 change during a config reload, mark and discard all our origin
29139 circuits. This fix should address edge cases where we change the
29140 config options and but then choose a circuit that we created before
29142 - If EntryNodes or ExitNodes are set, be more willing to use an
29143 unsuitable (e.g. slow or unstable) circuit. The user asked for it,
29145 - Make EntryNodes config option much more aggressive even when
29146 StrictNodes is not set. Before it would prepend your requested
29147 entrynodes to your list of guard nodes, but feel free to use others
29148 after that. Now it chooses only from your EntryNodes if any of
29149 those are available, and only falls back to others if a) they're
29150 all down and b) StrictNodes is not set.
29151 - Now we refresh your entry guards from EntryNodes at each consensus
29152 fetch -- rather than just at startup and then they slowly rot as
29153 the network changes.
29156 - Stop bridge directory authorities from answering dbg-stability.txt
29157 directory queries, which would let people fetch a list of all
29158 bridge identities they track. Bugfix on 0.2.1.6-alpha.
29161 - Log a notice when we get a new control connection. Now it's easier
29162 for security-conscious users to recognize when a local application
29163 is knocking on their controller door. Suggested by bug 1196.
29164 - New config option "CircuitStreamTimeout" to override our internal
29165 timeout schedule for how many seconds until we detach a stream from
29166 a circuit and try a new circuit. If your network is particularly
29167 slow, you might want to set this to a number like 60.
29168 - New controller command "getinfo config-text". It returns the
29169 contents that Tor would write if you send it a SAVECONF command,
29170 so the controller can write the file to disk itself.
29171 - New options for SafeLogging to allow scrubbing only log messages
29172 generated while acting as a relay.
29173 - Ship the bridges spec file in the tarball too.
29174 - Avoid a mad rush at the beginning of each month when each client
29175 rotates half of its guards. Instead we spread the rotation out
29176 throughout the month, but we still avoid leaving a precise timestamp
29177 in the state file about when we first picked the guard. Improves
29178 over the behavior introduced in 0.1.2.17.
29180 o Minor bugfixes (compiling):
29181 - Fix compilation on OS X 10.3, which has a stub mlockall() but
29182 hides it. Bugfix on 0.2.2.6-alpha.
29183 - Fix compilation on Solaris by removing support for the
29184 DisableAllSwap config option. Solaris doesn't have an rlimit for
29185 mlockall, so we cannot use it safely. Fixes bug 1198; bugfix on
29188 o Minor bugfixes (crashes):
29189 - Do not segfault when writing buffer stats when we haven't observed
29190 a single circuit to report about. Found by Fabian Lanze. Bugfix on
29192 - If we're in the pathological case where there's no exit bandwidth
29193 but there is non-exit bandwidth, or no guard bandwidth but there
29194 is non-guard bandwidth, don't crash during path selection. Bugfix
29196 - Fix an impossible-to-actually-trigger buffer overflow in relay
29197 descriptor generation. Bugfix on 0.1.0.15.
29199 o Minor bugfixes (privacy):
29200 - Fix an instance where a Tor directory mirror might accidentally
29201 log the IP address of a misbehaving Tor client. Bugfix on
29203 - Don't list Windows capabilities in relay descriptors. We never made
29204 use of them, and maybe it's a bad idea to publish them. Bugfix
29207 o Minor bugfixes (other):
29208 - Resolve an edge case in path weighting that could make us misweight
29209 our relay selection. Fixes bug 1203; bugfix on 0.0.8rc1.
29210 - Fix statistics on client numbers by country as seen by bridges that
29211 were broken in 0.2.2.1-alpha. Also switch to reporting full 24-hour
29212 intervals instead of variable 12-to-48-hour intervals.
29213 - After we free an internal connection structure, overwrite it
29214 with a different memory value than we use for overwriting a freed
29215 internal circuit structure. Should help with debugging. Suggested
29217 - Update our OpenSSL 0.9.8l fix so that it works with OpenSSL 0.9.8m
29220 o Removed features:
29221 - Remove the HSAuthorityRecordStats option that version 0 hidden
29222 service authorities could have used to track statistics of overall
29223 hidden service usage.
29226 Changes in version 0.2.1.22 - 2010-01-19
29227 Tor 0.2.1.22 fixes a critical privacy problem in bridge directory
29228 authorities -- it would tell you its whole history of bridge descriptors
29229 if you make the right directory request. This stable update also
29230 rotates two of the seven v3 directory authority keys and locations.
29232 o Directory authority changes:
29233 - Rotate keys (both v3 identity and relay identity) for moria1
29237 - Stop bridge directory authorities from answering dbg-stability.txt
29238 directory queries, which would let people fetch a list of all
29239 bridge identities they track. Bugfix on 0.2.1.6-alpha.
29242 Changes in version 0.2.1.21 - 2009-12-21
29243 Tor 0.2.1.21 fixes an incompatibility with the most recent OpenSSL
29244 library. If you use Tor on Linux / Unix and you're getting SSL
29245 renegotiation errors, upgrading should help. We also recommend an
29246 upgrade if you're an exit relay.
29249 - Work around a security feature in OpenSSL 0.9.8l that prevents our
29250 handshake from working unless we explicitly tell OpenSSL that we
29251 are using SSL renegotiation safely. We are, of course, but OpenSSL
29252 0.9.8l won't work unless we say we are.
29253 - Avoid crashing if the client is trying to upload many bytes and the
29254 circuit gets torn down at the same time, or if the flip side
29255 happens on the exit relay. Bugfix on 0.2.0.1-alpha; fixes bug 1150.
29258 - Do not refuse to learn about authority certs and v2 networkstatus
29259 documents that are older than the latest consensus. This bug might
29260 have degraded client bootstrapping. Bugfix on 0.2.0.10-alpha.
29261 Spotted and fixed by xmux.
29262 - Fix a couple of very-hard-to-trigger memory leaks, and one hard-to-
29263 trigger platform-specific option misparsing case found by Coverity
29265 - Fix a compilation warning on Fedora 12 by removing an impossible-to-
29266 trigger assert. Fixes bug 1173.
29269 Changes in version 0.2.2.6-alpha - 2009-11-19
29270 Tor 0.2.2.6-alpha lays the groundwork for many upcoming features:
29271 support for the new lower-footprint "microdescriptor" directory design,
29272 future-proofing our consensus format against new hash functions or
29273 other changes, and an Android port. It also makes Tor compatible with
29274 the upcoming OpenSSL 0.9.8l release, and fixes a variety of bugs.
29277 - Directory authorities can now create, vote on, and serve multiple
29278 parallel formats of directory data as part of their voting process.
29279 Partially implements Proposal 162: "Publish the consensus in
29281 - Directory authorities can now agree on and publish small summaries
29282 of router information that clients can use in place of regular
29283 server descriptors. This transition will eventually allow clients
29284 to use far less bandwidth for downloading information about the
29285 network. Begins the implementation of Proposal 158: "Clients
29286 download consensus + microdescriptors".
29287 - The directory voting system is now extensible to use multiple hash
29288 algorithms for signatures and resource selection. Newer formats
29289 are signed with SHA256, with a possibility for moving to a better
29290 hash algorithm in the future.
29291 - New DisableAllSwap option. If set to 1, Tor will attempt to lock all
29292 current and future memory pages via mlockall(). On supported
29293 platforms (modern Linux and probably BSD but not Windows or OS X),
29294 this should effectively disable any and all attempts to page out
29295 memory. This option requires that you start your Tor as root --
29296 if you use DisableAllSwap, please consider using the User option
29297 to properly reduce the privileges of your Tor.
29298 - Numerous changes, bugfixes, and workarounds from Nathan Freitas
29299 to help Tor build correctly for Android phones.
29302 - Work around a security feature in OpenSSL 0.9.8l that prevents our
29303 handshake from working unless we explicitly tell OpenSSL that we
29304 are using SSL renegotiation safely. We are, but OpenSSL 0.9.8l
29305 won't work unless we say we are.
29308 - Fix a crash bug when trying to initialize the evdns module in
29309 Libevent 2. Bugfix on 0.2.1.16-rc.
29310 - Stop logging at severity 'warn' when some other Tor client tries
29311 to establish a circuit with us using weak DH keys. It's a protocol
29312 violation, but that doesn't mean ordinary users need to hear about
29313 it. Fixes the bug part of bug 1114. Bugfix on 0.1.0.13.
29314 - Do not refuse to learn about authority certs and v2 networkstatus
29315 documents that are older than the latest consensus. This bug might
29316 have degraded client bootstrapping. Bugfix on 0.2.0.10-alpha.
29317 Spotted and fixed by xmux.
29318 - Fix numerous small code-flaws found by Coverity Scan Rung 3.
29319 - If all authorities restart at once right before a consensus vote,
29320 nobody will vote about "Running", and clients will get a consensus
29321 with no usable relays. Instead, authorities refuse to build a
29322 consensus if this happens. Bugfix on 0.2.0.10-alpha; fixes bug 1066.
29323 - If your relay can't keep up with the number of incoming create
29324 cells, it would log one warning per failure into your logs. Limit
29325 warnings to 1 per minute. Bugfix on 0.0.2pre10; fixes bug 1042.
29326 - Bridges now use "reject *:*" as their default exit policy. Bugfix
29327 on 0.2.0.3-alpha; fixes bug 1113.
29328 - Fix a memory leak on directory authorities during voting that was
29329 introduced in 0.2.2.1-alpha. Found via valgrind.
29332 Changes in version 0.2.1.20 - 2009-10-15
29333 Tor 0.2.1.20 fixes a crash bug when you're accessing many hidden
29334 services at once, prepares for more performance improvements, and
29335 fixes a bunch of smaller bugs.
29337 The Windows and OS X bundles also include a more recent Vidalia,
29338 and switch from Privoxy to Polipo.
29340 The OS X installers are now drag and drop. It's best to un-install
29341 Tor/Vidalia and then install this new bundle, rather than upgrade. If
29342 you want to upgrade, you'll need to update the paths for Tor and Polipo
29343 in the Vidalia Settings window.
29346 - Send circuit or stream sendme cells when our window has decreased
29347 by 100 cells, not when it has decreased by 101 cells. Bug uncovered
29348 by Karsten when testing the "reduce circuit window" performance
29349 patch. Bugfix on the 54th commit on Tor -- from July 2002,
29350 before the release of Tor 0.0.0. This is the new winner of the
29352 - Fix a remotely triggerable memory leak when a consensus document
29353 contains more than one signature from the same voter. Bugfix on
29355 - Avoid segfault in rare cases when finishing an introduction circuit
29356 as a client and finding out that we don't have an introduction key
29357 for it. Fixes bug 1073. Reported by Aaron Swartz.
29360 - Tor now reads the "circwindow" parameter out of the consensus,
29361 and uses that value for its circuit package window rather than the
29362 default of 1000 cells. Begins the implementation of proposal 168.
29364 o New directory authorities:
29365 - Set up urras (run by Jacob Appelbaum) as the seventh v3 directory
29367 - Move moria1 and tonga to alternate IP addresses.
29370 - Fix a signed/unsigned compile warning in 0.2.1.19.
29371 - Fix possible segmentation fault on directory authorities. Bugfix on
29373 - Fix an extremely rare infinite recursion bug that could occur if
29374 we tried to log a message after shutting down the log subsystem.
29375 Found by Matt Edman. Bugfix on 0.2.0.16-alpha.
29376 - Fix an obscure bug where hidden services on 64-bit big-endian
29377 systems might mis-read the timestamp in v3 introduce cells, and
29378 refuse to connect back to the client. Discovered by "rotor".
29379 Bugfix on 0.2.1.6-alpha.
29380 - We were triggering a CLOCK_SKEW controller status event whenever
29381 we connect via the v2 connection protocol to any relay that has
29382 a wrong clock. Instead, we should only inform the controller when
29383 it's a trusted authority that claims our clock is wrong. Bugfix
29384 on 0.2.0.20-rc; starts to fix bug 1074. Reported by SwissTorExit.
29385 - We were telling the controller about CHECKING_REACHABILITY and
29386 REACHABILITY_FAILED status events whenever we launch a testing
29387 circuit or notice that one has failed. Instead, only tell the
29388 controller when we want to inform the user of overall success or
29389 overall failure. Bugfix on 0.1.2.6-alpha. Fixes bug 1075. Reported
29391 - Don't warn when we're using a circuit that ends with a node
29392 excluded in ExcludeExitNodes, but the circuit is not used to access
29393 the outside world. This should help fix bug 1090. Bugfix on
29395 - Work around a small memory leak in some versions of OpenSSL that
29396 stopped the memory used by the hostname TLS extension from being
29400 - Add a "getinfo status/accepted-server-descriptor" controller
29401 command, which is the recommended way for controllers to learn
29402 whether our server descriptor has been successfully received by at
29403 least on directory authority. Un-recommend good-server-descriptor
29404 getinfo and status events until we have a better design for them.
29407 Changes in version 0.2.2.5-alpha - 2009-10-11
29408 Tor 0.2.2.5-alpha fixes a few compile problems in 0.2.2.4-alpha.
29411 - Make the tarball compile again. Oops. Bugfix on 0.2.2.4-alpha.
29413 o Directory authorities:
29414 - Temporarily (just for this release) move dizum to an alternate
29418 Changes in version 0.2.2.4-alpha - 2009-10-10
29419 Tor 0.2.2.4-alpha fixes more crash bugs in 0.2.2.2-alpha. It also
29420 introduces a new unit test framework, shifts directry authority
29421 addresses around to reduce the impact from recent blocking events,
29422 and fixes a few smaller bugs.
29425 - Fix several more asserts in the circuit_build_times code, for
29426 example one that causes Tor to fail to start once we have
29427 accumulated 5000 build times in the state file. Bugfixes on
29428 0.2.2.2-alpha; fixes bug 1108.
29430 o New directory authorities:
29431 - Move moria1 and Tonga to alternate IP addresses.
29434 - Log SSL state transitions at debug level during handshake, and
29435 include SSL states in error messages. This may help debug future
29436 SSL handshake issues.
29437 - Add a new "Handshake" log domain for activities that happen
29438 during the TLS handshake.
29439 - Revert to the "June 3 2009" ip-to-country file. The September one
29440 seems to have removed most US IP addresses.
29441 - Directory authorities now reject Tor relays with versions less than
29442 0.1.2.14. This step cuts out four relays from the current network,
29443 none of which are very big.
29446 - Fix a couple of smaller issues with gathering statistics. Bugfixes
29448 - Fix two memory leaks in the error case of
29449 circuit_build_times_parse_state(). Bugfix on 0.2.2.2-alpha.
29450 - Don't count one-hop circuits when we're estimating how long it
29451 takes circuits to build on average. Otherwise we'll set our circuit
29452 build timeout lower than we should. Bugfix on 0.2.2.2-alpha.
29453 - Directory authorities no longer change their opinion of, or vote on,
29454 whether a router is Running, unless they have themselves been
29455 online long enough to have some idea. Bugfix on 0.2.0.6-alpha.
29458 o Code simplifications and refactoring:
29459 - Revise our unit tests to use the "tinytest" framework, so we
29460 can run tests in their own processes, have smarter setup/teardown
29461 code, and so on. The unit test code has moved to its own
29462 subdirectory, and has been split into multiple modules.
29465 Changes in version 0.2.2.3-alpha - 2009-09-23
29466 Tor 0.2.2.3-alpha fixes a few crash bugs in 0.2.2.2-alpha.
29469 - Fix an overzealous assert in our new circuit build timeout code.
29470 Bugfix on 0.2.2.2-alpha; fixes bug 1103.
29473 - If the networkstatus consensus tells us that we should use a
29474 negative circuit package window, ignore it. Otherwise we'll
29475 believe it and then trigger an assert. Bugfix on 0.2.2.2-alpha.
29478 Changes in version 0.2.2.2-alpha - 2009-09-21
29479 Tor 0.2.2.2-alpha introduces our latest performance improvement for
29480 clients: Tor tracks the average time it takes to build a circuit, and
29481 avoids using circuits that take too long to build. For fast connections,
29482 this feature can cut your expected latency in half. For slow or flaky
29483 connections, it could ruin your Tor experience. Let us know if it does!
29486 - Tor now tracks how long it takes to build client-side circuits
29487 over time, and adapts its timeout to local network performance.
29488 Since a circuit that takes a long time to build will also provide
29489 bad performance, we get significant latency improvements by
29490 discarding the slowest 20% of circuits. Specifically, Tor creates
29491 circuits more aggressively than usual until it has enough data
29492 points for a good timeout estimate. Implements proposal 151.
29493 We are especially looking for reports (good and bad) from users with
29494 both EDGE and broadband connections that can move from broadband
29495 to EDGE and find out if the build-time data in the .tor/state gets
29496 reset without loss of Tor usability. You should also see a notice
29497 log message telling you that Tor has reset its timeout.
29498 - Directory authorities can now vote on arbitrary integer values as
29499 part of the consensus process. This is designed to help set
29500 network-wide parameters. Implements proposal 167.
29501 - Tor now reads the "circwindow" parameter out of the consensus,
29502 and uses that value for its circuit package window rather than the
29503 default of 1000 cells. Begins the implementation of proposal 168.
29506 - Fix a remotely triggerable memory leak when a consensus document
29507 contains more than one signature from the same voter. Bugfix on
29511 - Fix an extremely rare infinite recursion bug that could occur if
29512 we tried to log a message after shutting down the log subsystem.
29513 Found by Matt Edman. Bugfix on 0.2.0.16-alpha.
29514 - Fix parsing for memory or time units given without a space between
29515 the number and the unit. Bugfix on 0.2.2.1-alpha; fixes bug 1076.
29516 - A networkstatus vote must contain exactly one signature. Spec
29517 conformance issue. Bugfix on 0.2.0.3-alpha.
29518 - Fix an obscure bug where hidden services on 64-bit big-endian
29519 systems might mis-read the timestamp in v3 introduce cells, and
29520 refuse to connect back to the client. Discovered by "rotor".
29521 Bugfix on 0.2.1.6-alpha.
29522 - We were triggering a CLOCK_SKEW controller status event whenever
29523 we connect via the v2 connection protocol to any relay that has
29524 a wrong clock. Instead, we should only inform the controller when
29525 it's a trusted authority that claims our clock is wrong. Bugfix
29526 on 0.2.0.20-rc; starts to fix bug 1074. Reported by SwissTorExit.
29527 - We were telling the controller about CHECKING_REACHABILITY and
29528 REACHABILITY_FAILED status events whenever we launch a testing
29529 circuit or notice that one has failed. Instead, only tell the
29530 controller when we want to inform the user of overall success or
29531 overall failure. Bugfix on 0.1.2.6-alpha. Fixes bug 1075. Reported
29533 - Don't warn when we're using a circuit that ends with a node
29534 excluded in ExcludeExitNodes, but the circuit is not used to access
29535 the outside world. This should help fix bug 1090, but more problems
29536 remain. Bugfix on 0.2.1.6-alpha.
29537 - Work around a small memory leak in some versions of OpenSSL that
29538 stopped the memory used by the hostname TLS extension from being
29540 - Make our 'torify' script more portable; if we have only one of
29541 'torsocks' or 'tsocks' installed, don't complain to the user;
29542 and explain our warning about tsocks better.
29545 - Add a "getinfo status/accepted-server-descriptor" controller
29546 command, which is the recommended way for controllers to learn
29547 whether our server descriptor has been successfully received by at
29548 least on directory authority. Un-recommend good-server-descriptor
29549 getinfo and status events until we have a better design for them.
29550 - Update to the "September 4 2009" ip-to-country file.
29553 Changes in version 0.2.2.1-alpha - 2009-08-26
29554 Tor 0.2.2.1-alpha disables ".exit" address notation by default, allows
29555 Tor clients to bootstrap on networks where only port 80 is reachable,
29556 makes it more straightforward to support hardware crypto accelerators,
29557 and starts the groundwork for gathering stats safely at relays.
29560 - Start the process of disabling ".exit" address notation, since it
29561 can be used for a variety of esoteric application-level attacks
29562 on users. To reenable it, set "AllowDotExit 1" in your torrc. Fix
29565 o New directory authorities:
29566 - Set up urras (run by Jacob Appelbaum) as the seventh v3 directory
29570 - New AccelName and AccelDir options add support for dynamic OpenSSL
29571 hardware crypto acceleration engines.
29572 - Tor now supports tunneling all of its outgoing connections over
29573 a SOCKS proxy, using the SOCKS4Proxy and/or SOCKS5Proxy
29574 configuration options. Code by Christopher Davis.
29577 - Send circuit or stream sendme cells when our window has decreased
29578 by 100 cells, not when it has decreased by 101 cells. Bug uncovered
29579 by Karsten when testing the "reduce circuit window" performance
29580 patch. Bugfix on the 54th commit on Tor -- from July 2002,
29581 before the release of Tor 0.0.0. This is the new winner of the
29584 o New options for gathering stats safely:
29585 - Directory mirrors that set "DirReqStatistics 1" write statistics
29586 about directory requests to disk every 24 hours. As compared to the
29587 --enable-geoip-stats flag in 0.2.1.x, there are a few improvements:
29588 1) stats are written to disk exactly every 24 hours; 2) estimated
29589 shares of v2 and v3 requests are determined as mean values, not at
29590 the end of a measurement period; 3) unresolved requests are listed
29591 with country code '??'; 4) directories also measure download times.
29592 - Exit nodes that set "ExitPortStatistics 1" write statistics on the
29593 number of exit streams and transferred bytes per port to disk every
29595 - Relays that set "CellStatistics 1" write statistics on how long
29596 cells spend in their circuit queues to disk every 24 hours.
29597 - Entry nodes that set "EntryStatistics 1" write statistics on the
29598 rough number and origins of connecting clients to disk every 24
29600 - Relays that write any of the above statistics to disk and set
29601 "ExtraInfoStatistics 1" include the past 24 hours of statistics in
29602 their extra-info documents.
29605 - New --digests command-line switch to output the digests of the
29606 source files Tor was built with.
29607 - The "torify" script now uses torsocks where available.
29608 - The memarea code now uses a sentinel value at the end of each area
29609 to make sure nothing writes beyond the end of an area. This might
29610 help debug some conceivable causes of bug 930.
29611 - Time and memory units in the configuration file can now be set to
29612 fractional units. For example, "2.5 GB" is now a valid value for
29614 - Certain Tor clients (such as those behind check.torproject.org) may
29615 want to fetch the consensus in an extra early manner. To enable this
29616 a user may now set FetchDirInfoExtraEarly to 1. This also depends on
29617 setting FetchDirInfoEarly to 1. Previous behavior will stay the same
29618 as only certain clients who must have this information sooner should
29620 - Instead of adding the svn revision to the Tor version string, report
29621 the git commit (when we're building from a git checkout).
29624 - If any of the v3 certs we download are unparseable, we should
29625 actually notice the failure so we don't retry indefinitely. Bugfix
29626 on 0.2.0.x; reported by "rotator".
29627 - If the cached cert file is unparseable, warn but don't exit.
29628 - Fix possible segmentation fault on directory authorities. Bugfix on
29630 - When Tor fails to parse a descriptor of any kind, dump it to disk.
29631 Might help diagnosing bug 1051.
29633 o Deprecated and removed features:
29634 - The controller no longer accepts the old obsolete "addr-mappings/"
29635 or "unregistered-servers-" GETINFO values.
29636 - Hidden services no longer publish version 0 descriptors, and clients
29637 do not request or use version 0 descriptors. However, the old hidden
29638 service authorities still accept and serve version 0 descriptors
29639 when contacted by older hidden services/clients.
29640 - The EXTENDED_EVENTS and VERBOSE_NAMES controller features are now
29641 always on; using them is necessary for correct forward-compatible
29643 - Remove support for .noconnect style addresses. Nobody was using
29644 them, and they provided another avenue for detecting Tor users
29645 via application-level web tricks.
29647 o Packaging changes:
29648 - Upgrade Vidalia from 0.1.15 to 0.2.3 in the Windows and OS X
29649 installer bundles. See
29650 https://trac.vidalia-project.net/browser/vidalia/tags/vidalia-0.2.3/CHANGELOG
29651 for details of what's new in Vidalia 0.2.3.
29652 - Windows Vidalia Bundle: update Privoxy from 3.0.6 to 3.0.14-beta.
29653 - OS X Vidalia Bundle: move to Polipo 1.0.4 with Tor specific
29654 configuration file, rather than the old Privoxy.
29655 - OS X Vidalia Bundle: Vidalia, Tor, and Polipo are compiled as
29656 x86-only for better compatibility with OS X 10.6, aka Snow Leopard.
29657 - OS X Tor Expert Bundle: Tor is compiled as x86-only for
29658 better compatibility with OS X 10.6, aka Snow Leopard.
29659 - OS X Vidalia Bundle: The multi-package installer is now replaced
29660 by a simple drag and drop to the /Applications folder. This change
29661 occurred with the upgrade to Vidalia 0.2.3.
29664 Changes in version 0.2.1.19 - 2009-07-28
29665 Tor 0.2.1.19 fixes a major bug with accessing and providing hidden
29666 services on Tor 0.2.1.3-alpha through 0.2.1.18.
29669 - Make accessing hidden services on 0.2.1.x work right again.
29670 Bugfix on 0.2.1.3-alpha; workaround for bug 1038. Diagnosis and
29671 part of patch provided by "optimist".
29674 - When a relay/bridge is writing out its identity key fingerprint to
29675 the "fingerprint" file and to its logs, write it without spaces. Now
29676 it will look like the fingerprints in our bridges documentation,
29677 and confuse fewer users.
29680 - Relays no longer publish a new server descriptor if they change
29681 their MaxAdvertisedBandwidth config option but it doesn't end up
29682 changing their advertised bandwidth numbers. Bugfix on 0.2.0.28-rc;
29683 fixes bug 1026. Patch from Sebastian.
29684 - Avoid leaking memory every time we get a create cell but we have
29685 so many already queued that we refuse it. Bugfix on 0.2.0.19-alpha;
29686 fixes bug 1034. Reported by BarkerJr.
29689 Changes in version 0.2.1.18 - 2009-07-24
29690 Tor 0.2.1.18 lays the foundations for performance improvements,
29691 adds status events to help users diagnose bootstrap problems, adds
29692 optional authentication/authorization for hidden services, fixes a
29693 variety of potential anonymity problems, and includes a huge pile of
29694 other features and bug fixes.
29697 - Add LIBS=-lrt to Makefile.am so the Tor RPMs use a static libevent.
29700 Changes in version 0.2.1.17-rc - 2009-07-07
29701 Tor 0.2.1.17-rc marks the fourth -- and hopefully last -- release
29702 candidate for the 0.2.1.x series. It lays the groundwork for further
29703 client performance improvements, and also fixes a big bug with directory
29704 authorities that were causing them to assign Guard and Stable flags
29707 The Windows bundles also finally include the geoip database that we
29708 thought we'd been shipping since 0.2.0.x (oops), and the OS X bundles
29709 should actually install Torbutton rather than giving you a cryptic
29710 failure message (oops).
29713 - Clients now use the bandwidth values in the consensus, rather than
29714 the bandwidth values in each relay descriptor. This approach opens
29715 the door to more accurate bandwidth estimates once the directory
29716 authorities start doing active measurements. Implements more of
29720 - When Tor clients restart after 1-5 days, they discard all their
29721 cached descriptors as too old, but they still use the cached
29722 consensus document. This approach is good for robustness, but
29723 bad for performance: since they don't know any bandwidths, they
29724 end up choosing at random rather than weighting their choice by
29725 speed. Fixed by the above feature of putting bandwidths in the
29726 consensus. Bugfix on 0.2.0.x.
29727 - Directory authorities were neglecting to mark relays down in their
29728 internal histories if the relays fall off the routerlist without
29729 ever being found unreachable. So there were relays in the histories
29730 that haven't been seen for eight months, and are listed as being
29731 up for eight months. This wreaked havoc on the "median wfu"
29732 and "median mtbf" calculations, in turn making Guard and Stable
29733 flags very wrong, hurting network performance. Fixes bugs 696 and
29734 969. Bugfix on 0.2.0.6-alpha.
29737 - Serve the DirPortFrontPage page even when we have been approaching
29738 our quotas recently. Fixes bug 1013; bugfix on 0.2.1.8-alpha.
29739 - The control port would close the connection before flushing long
29740 replies, such as the network consensus, if a QUIT command was issued
29741 before the reply had completed. Now, the control port flushes all
29742 pending replies before closing the connection. Also fixed a spurious
29743 warning when a QUIT command is issued after a malformed or rejected
29744 AUTHENTICATE command, but before the connection was closed. Patch
29745 by Marcus Griep. Bugfix on 0.2.0.x; fixes bugs 1015 and 1016.
29746 - When we can't find an intro key for a v2 hidden service descriptor,
29747 fall back to the v0 hidden service descriptor and log a bug message.
29748 Workaround for bug 1024.
29749 - Fix a log message that did not respect the SafeLogging option.
29753 - If we're a relay and we change our IP address, be more verbose
29754 about the reason that made us change. Should help track down
29755 further bugs for relays on dynamic IP addresses.
29758 Changes in version 0.2.0.35 - 2009-06-24
29760 - Avoid crashing in the presence of certain malformed descriptors.
29761 Found by lark, and by automated fuzzing.
29762 - Fix an edge case where a malicious exit relay could convince a
29763 controller that the client's DNS question resolves to an internal IP
29764 address. Bug found and fixed by "optimist"; bugfix on 0.1.2.8-beta.
29767 - Finally fix the bug where dynamic-IP relays disappear when their
29768 IP address changes: directory mirrors were mistakenly telling
29769 them their old address if they asked via begin_dir, so they
29770 never got an accurate answer about their new address, so they
29771 just vanished after a day. For belt-and-suspenders, relays that
29772 don't set Address in their config now avoid using begin_dir for
29773 all direct connections. Should fix bugs 827, 883, and 900.
29774 - Fix a timing-dependent, allocator-dependent, DNS-related crash bug
29775 that would occur on some exit nodes when DNS failures and timeouts
29776 occurred in certain patterns. Fix for bug 957.
29779 - When starting with a cache over a few days old, do not leak
29780 memory for the obsolete router descriptors in it. Bugfix on
29781 0.2.0.33; fixes bug 672.
29782 - Hidden service clients didn't use a cached service descriptor that
29783 was older than 15 minutes, but wouldn't fetch a new one either,
29784 because there was already one in the cache. Now, fetch a v2
29785 descriptor unless the same descriptor was added to the cache within
29786 the last 15 minutes. Fixes bug 997; reported by Marcus Griep.
29789 Changes in version 0.2.1.16-rc - 2009-06-20
29790 Tor 0.2.1.16-rc speeds up performance for fast exit relays, and fixes
29791 a bunch of minor bugs.
29794 - Fix an edge case where a malicious exit relay could convince a
29795 controller that the client's DNS question resolves to an internal IP
29796 address. Bug found and fixed by "optimist"; bugfix on 0.1.2.8-beta.
29798 o Major performance improvements (on 0.2.0.x):
29799 - Disable and refactor some debugging checks that forced a linear scan
29800 over the whole server-side DNS cache. These accounted for over 50%
29801 of CPU time on a relatively busy exit node's gprof profile. Found
29803 - Disable some debugging checks that appeared in exit node profile
29807 - Update to the "June 3 2009" ip-to-country file.
29808 - Do not have tor-resolve automatically refuse all .onion addresses;
29809 if AutomapHostsOnResolve is set in your torrc, this will work fine.
29811 o Minor bugfixes (on 0.2.0.x):
29812 - Log correct error messages for DNS-related network errors on
29814 - Fix a race condition that could cause crashes or memory corruption
29815 when running as a server with a controller listening for log
29817 - Avoid crashing when we have a policy specified in a DirPolicy or
29818 SocksPolicy or ReachableAddresses option with ports set on it,
29819 and we re-load the policy. May fix bug 996.
29820 - Hidden service clients didn't use a cached service descriptor that
29821 was older than 15 minutes, but wouldn't fetch a new one either,
29822 because there was already one in the cache. Now, fetch a v2
29823 descriptor unless the same descriptor was added to the cache within
29824 the last 15 minutes. Fixes bug 997; reported by Marcus Griep.
29826 o Minor bugfixes (on 0.2.1.x):
29827 - Don't warn users about low port and hibernation mix when they
29828 provide a *ListenAddress directive to fix that. Bugfix on
29830 - When switching back and forth between bridge mode, do not start
29831 gathering GeoIP data until two hours have passed.
29832 - Do not complain that the user has requested an excluded node as
29833 an exit when the node is not really an exit. This could happen
29834 because the circuit was for testing, or an introduction point.
29838 Changes in version 0.2.1.15-rc - 2009-05-25
29839 Tor 0.2.1.15-rc marks the second release candidate for the 0.2.1.x
29840 series. It fixes a major bug on fast exit relays, as well as a variety
29841 of more minor bugs.
29843 o Major bugfixes (on 0.2.0.x):
29844 - Fix a timing-dependent, allocator-dependent, DNS-related crash bug
29845 that would occur on some exit nodes when DNS failures and timeouts
29846 occurred in certain patterns. Fix for bug 957.
29848 o Minor bugfixes (on 0.2.0.x):
29849 - Actually return -1 in the error case for read_bandwidth_usage().
29850 Harmless bug, since we currently don't care about the return value
29851 anywhere. Bugfix on 0.2.0.9-alpha.
29852 - Provide a more useful log message if bug 977 (related to buffer
29853 freelists) ever reappears, and do not crash right away.
29854 - Fix an assertion failure on 64-bit platforms when we allocated
29855 memory right up to the end of a memarea, then realigned the memory
29856 one step beyond the end. Fixes a possible cause of bug 930.
29857 - Protect the count of open sockets with a mutex, so we can't
29858 corrupt it when two threads are closing or opening sockets at once.
29859 Fix for bug 939. Bugfix on 0.2.0.1-alpha.
29860 - Don't allow a bridge to publish its router descriptor to a
29861 non-bridge directory authority. Fixes part of bug 932.
29862 - When we change to or from being a bridge, reset our counts of
29863 client usage by country. Fixes bug 932.
29864 - Fix a bug that made stream bandwidth get misreported to the
29866 - Stop using malloc_usable_size() to use more area than we had
29867 actually allocated: it was safe, but made valgrind really unhappy.
29868 - Fix a memory leak when v3 directory authorities load their keys
29869 and cert from disk. Bugfix on 0.2.0.1-alpha.
29871 o Minor bugfixes (on 0.2.1.x):
29872 - Fix use of freed memory when deciding to mark a non-addable
29873 descriptor as never-downloadable. Bugfix on 0.2.1.9-alpha.
29876 Changes in version 0.2.1.14-rc - 2009-04-12
29877 Tor 0.2.1.14-rc marks the first release candidate for the 0.2.1.x
29878 series. It begins fixing some major performance problems, and also
29879 finally addresses the bug that was causing relays on dynamic IP
29880 addresses to fall out of the directory.
29883 - Clients replace entry guards that were chosen more than a few months
29884 ago. This change should significantly improve client performance,
29885 especially once more people upgrade, since relays that have been
29886 a guard for a long time are currently overloaded.
29888 o Major bugfixes (on 0.2.0):
29889 - Finally fix the bug where dynamic-IP relays disappear when their
29890 IP address changes: directory mirrors were mistakenly telling
29891 them their old address if they asked via begin_dir, so they
29892 never got an accurate answer about their new address, so they
29893 just vanished after a day. For belt-and-suspenders, relays that
29894 don't set Address in their config now avoid using begin_dir for
29895 all direct connections. Should fix bugs 827, 883, and 900.
29896 - Relays were falling out of the networkstatus consensus for
29897 part of a day if they changed their local config but the
29898 authorities discarded their new descriptor as "not sufficiently
29899 different". Now directory authorities accept a descriptor as changed
29900 if bandwidthrate or bandwidthburst changed. Partial fix for bug 962;
29901 patch by Sebastian.
29902 - Avoid crashing in the presence of certain malformed descriptors.
29903 Found by lark, and by automated fuzzing.
29906 - When generating circuit events with verbose nicknames for
29907 controllers, try harder to look up nicknames for routers on a
29908 circuit. (Previously, we would look in the router descriptors we had
29909 for nicknames, but not in the consensus.) Partial fix for bug 941.
29910 - If the bridge config line doesn't specify a port, assume 443.
29911 This makes bridge lines a bit smaller and easier for users to
29913 - Raise the minimum bandwidth to be a relay from 20000 bytes to 20480
29914 bytes (aka 20KB/s), to match our documentation. Also update
29915 directory authorities so they always assign the Fast flag to relays
29916 with 20KB/s of capacity. Now people running relays won't suddenly
29917 find themselves not seeing any use, if the network gets faster
29919 - Update to the "April 3 2009" ip-to-country file.
29922 - Avoid trying to print raw memory to the logs when we decide to
29923 give up on downloading a given relay descriptor. Bugfix on
29925 - In tor-resolve, when the Tor client to use is specified by
29926 <hostname>:<port>, actually use the specified port rather than
29927 defaulting to 9050. Bugfix on 0.2.1.6-alpha.
29928 - Make directory usage recording work again. Bugfix on 0.2.1.6-alpha.
29929 - When starting with a cache over a few days old, do not leak
29930 memory for the obsolete router descriptors in it. Bugfix on
29932 - Avoid double-free on list of successfully uploaded hidden
29933 service discriptors. Fix for bug 948. Bugfix on 0.2.1.6-alpha.
29934 - Change memarea_strndup() implementation to work even when
29935 duplicating a string at the end of a page. This bug was
29936 harmless for now, but could have meant crashes later. Fix by
29937 lark. Bugfix on 0.2.1.1-alpha.
29938 - Limit uploaded directory documents to be 16M rather than 500K.
29939 The directory authorities were refusing v3 consensus votes from
29940 other authorities, since the votes are now 504K. Fixes bug 959;
29941 bugfix on 0.0.2pre17 (where we raised it from 50K to 500K ;).
29942 - Directory authorities should never send a 503 "busy" response to
29943 requests for votes or keys. Bugfix on 0.2.0.8-alpha; exposed by
29947 Changes in version 0.2.1.13-alpha - 2009-03-09
29948 Tor 0.2.1.13-alpha includes another big pile of minor bugfixes and
29949 cleanups. We're finally getting close to a release candidate.
29952 - Correctly update the list of which countries we exclude as
29953 exits, when the GeoIP file is loaded or reloaded. Diagnosed by
29954 lark. Bugfix on 0.2.1.6-alpha.
29956 o Minor bugfixes (on 0.2.0.x and earlier):
29957 - Automatically detect MacOSX versions earlier than 10.4.0, and
29958 disable kqueue from inside Tor when running with these versions.
29959 We previously did this from the startup script, but that was no
29960 help to people who didn't use the startup script. Resolves bug 863.
29961 - When we had picked an exit node for a connection, but marked it as
29962 "optional", and it turned out we had no onion key for the exit,
29963 stop wanting that exit and try again. This situation may not
29964 be possible now, but will probably become feasible with proposal
29965 158. Spotted by rovv. Fixes another case of bug 752.
29966 - Clients no longer cache certificates for authorities they do not
29967 recognize. Bugfix on 0.2.0.9-alpha.
29968 - When we can't transmit a DNS request due to a network error, retry
29969 it after a while, and eventually transmit a failing response to
29970 the RESOLVED cell. Bugfix on 0.1.2.5-alpha.
29971 - If the controller claimed responsibility for a stream, but that
29972 stream never finished making its connection, it would live
29973 forever in circuit_wait state. Now we close it after SocksTimeout
29974 seconds. Bugfix on 0.1.2.7-alpha; reported by Mike Perry.
29975 - Drop begin cells to a hidden service if they come from the middle
29976 of a circuit. Patch from lark.
29977 - When we erroneously receive two EXTEND cells for the same circuit
29978 ID on the same connection, drop the second. Patch from lark.
29979 - Fix a crash that occurs on exit nodes when a nameserver request
29980 timed out. Bugfix on 0.1.2.1-alpha; our CLEAR debugging code had
29981 been suppressing the bug since 0.1.2.10-alpha. Partial fix for
29983 - Do not assume that a stack-allocated character array will be
29984 64-bit aligned on platforms that demand that uint64_t access is
29985 aligned. Possible fix for bug 604.
29986 - Parse dates and IPv4 addresses in a locale- and libc-independent
29987 manner, to avoid platform-dependent behavior on malformed input.
29988 - Build correctly when configured to build outside the main source
29989 path. Patch from Michael Gold.
29990 - We were already rejecting relay begin cells with destination port
29991 of 0. Now also reject extend cells with destination port or address
29992 of 0. Suggested by lark.
29994 o Minor bugfixes (on 0.2.1.x):
29995 - Don't re-extend introduction circuits if we ran out of RELAY_EARLY
29996 cells. Bugfix on 0.2.1.3-alpha. Fixes more of bug 878.
29997 - If we're an exit node, scrub the IP address to which we are exiting
29998 in the logs. Bugfix on 0.2.1.8-alpha.
30001 - On Linux, use the prctl call to re-enable core dumps when the user
30003 - New controller event NEWCONSENSUS that lists the networkstatus
30004 lines for every recommended relay. Now controllers like Torflow
30005 can keep up-to-date on which relays they should be using.
30006 - Update to the "February 26 2009" ip-to-country file.
30009 Changes in version 0.2.0.34 - 2009-02-08
30010 Tor 0.2.0.34 features several more security-related fixes. You should
30011 upgrade, especially if you run an exit relay (remote crash) or a
30012 directory authority (remote infinite loop), or you're on an older
30013 (pre-XP) or not-recently-patched Windows (remote exploit).
30015 This release marks end-of-life for Tor 0.1.2.x. Those Tor versions
30016 have many known flaws, and nobody should be using them. You should
30017 upgrade. If you're using a Linux or BSD and its packages are obsolete,
30018 stop using those packages and upgrade anyway.
30021 - Fix an infinite-loop bug on handling corrupt votes under certain
30022 circumstances. Bugfix on 0.2.0.8-alpha.
30023 - Fix a temporary DoS vulnerability that could be performed by
30024 a directory mirror. Bugfix on 0.2.0.9-alpha; reported by lark.
30025 - Avoid a potential crash on exit nodes when processing malformed
30026 input. Remote DoS opportunity. Bugfix on 0.2.0.33.
30027 - Do not accept incomplete ipv4 addresses (like 192.168.0) as valid.
30028 Spec conformance issue. Bugfix on Tor 0.0.2pre27.
30031 - Fix compilation on systems where time_t is a 64-bit integer.
30032 Patch from Matthias Drochner.
30033 - Don't consider expiring already-closed client connections. Fixes
30034 bug 893. Bugfix on 0.0.2pre20.
30037 Changes in version 0.2.1.12-alpha - 2009-02-08
30038 Tor 0.2.1.12-alpha features several more security-related fixes. You
30039 should upgrade, especially if you run an exit relay (remote crash) or
30040 a directory authority (remote infinite loop), or you're on an older
30041 (pre-XP) or not-recently-patched Windows (remote exploit). It also
30042 includes a big pile of minor bugfixes and cleanups.
30045 - Fix an infinite-loop bug on handling corrupt votes under certain
30046 circumstances. Bugfix on 0.2.0.8-alpha.
30047 - Fix a temporary DoS vulnerability that could be performed by
30048 a directory mirror. Bugfix on 0.2.0.9-alpha; reported by lark.
30049 - Avoid a potential crash on exit nodes when processing malformed
30050 input. Remote DoS opportunity. Bugfix on 0.2.1.7-alpha.
30053 - Let controllers actually ask for the "clients_seen" event for
30054 getting usage summaries on bridge relays. Bugfix on 0.2.1.10-alpha;
30055 reported by Matt Edman.
30056 - Fix a compile warning on OSX Panther. Fixes bug 913; bugfix against
30058 - Fix a bug in address parsing that was preventing bridges or hidden
30059 service targets from being at IPv6 addresses.
30060 - Solve a bug that kept hardware crypto acceleration from getting
30061 enabled when accounting was turned on. Fixes bug 907. Bugfix on
30063 - Remove a bash-ism from configure.in to build properly on non-Linux
30064 platforms. Bugfix on 0.2.1.1-alpha.
30065 - Fix code so authorities _actually_ send back X-Descriptor-Not-New
30066 headers. Bugfix on 0.2.0.10-alpha.
30067 - Don't consider expiring already-closed client connections. Fixes
30068 bug 893. Bugfix on 0.0.2pre20.
30069 - Fix another interesting corner-case of bug 891 spotted by rovv:
30070 Previously, if two hosts had different amounts of clock drift, and
30071 one of them created a new connection with just the wrong timing,
30072 the other might decide to deprecate the new connection erroneously.
30073 Bugfix on 0.1.1.13-alpha.
30074 - Resolve a very rare crash bug that could occur when the user forced
30075 a nameserver reconfiguration during the middle of a nameserver
30076 probe. Fixes bug 526. Bugfix on 0.1.2.1-alpha.
30077 - Support changing value of ServerDNSRandomizeCase during SIGHUP.
30078 Bugfix on 0.2.1.7-alpha.
30079 - If we're using bridges and our network goes away, be more willing
30080 to forgive our bridges and try again when we get an application
30081 request. Bugfix on 0.2.0.x.
30084 - Support platforms where time_t is 64 bits long. (Congratulations,
30085 NetBSD!) Patch from Matthias Drochner.
30086 - Add a 'getinfo status/clients-seen' controller command, in case
30087 controllers want to hear clients_seen events but connect late.
30090 - Disable GCC's strict alias optimization by default, to avoid the
30091 likelihood of its introducing subtle bugs whenever our code violates
30092 the letter of C99's alias rules.
30095 Changes in version 0.2.0.33 - 2009-01-21
30096 Tor 0.2.0.33 fixes a variety of bugs that were making relays less
30097 useful to users. It also finally fixes a bug where a relay or client
30098 that's been off for many days would take a long time to bootstrap.
30100 This update also fixes an important security-related bug reported by
30101 Ilja van Sprundel. You should upgrade. (We'll send out more details
30102 about the bug once people have had some time to upgrade.)
30105 - Fix a heap-corruption bug that may be remotely triggerable on
30106 some platforms. Reported by Ilja van Sprundel.
30109 - When a stream at an exit relay is in state "resolving" or
30110 "connecting" and it receives an "end" relay cell, the exit relay
30111 would silently ignore the end cell and not close the stream. If
30112 the client never closes the circuit, then the exit relay never
30113 closes the TCP connection. Bug introduced in Tor 0.1.2.1-alpha;
30114 reported by "wood".
30115 - When sending CREATED cells back for a given circuit, use a 64-bit
30116 connection ID to find the right connection, rather than an addr:port
30117 combination. Now that we can have multiple OR connections between
30118 the same ORs, it is no longer possible to use addr:port to uniquely
30119 identify a connection.
30120 - Bridge relays that had DirPort set to 0 would stop fetching
30121 descriptors shortly after startup, and then briefly resume
30122 after a new bandwidth test and/or after publishing a new bridge
30123 descriptor. Bridge users that try to bootstrap from them would
30124 get a recent networkstatus but would get descriptors from up to
30125 18 hours earlier, meaning most of the descriptors were obsolete
30126 already. Reported by Tas; bugfix on 0.2.0.13-alpha.
30127 - Prevent bridge relays from serving their 'extrainfo' document
30128 to anybody who asks, now that extrainfo docs include potentially
30129 sensitive aggregated client geoip summaries. Bugfix on
30131 - If the cached networkstatus consensus is more than five days old,
30132 discard it rather than trying to use it. In theory it could be
30133 useful because it lists alternate directory mirrors, but in practice
30134 it just means we spend many minutes trying directory mirrors that
30135 are long gone from the network. Also discard router descriptors as
30136 we load them if they are more than five days old, since the onion
30137 key is probably wrong by now. Bugfix on 0.2.0.x. Fixes bug 887.
30140 - Do not mark smartlist_bsearch_idx() function as ATTR_PURE. This bug
30141 could make gcc generate non-functional binary search code. Bugfix
30143 - Build correctly on platforms without socklen_t.
30144 - Compile without warnings on solaris.
30145 - Avoid potential crash on internal error during signature collection.
30146 Fixes bug 864. Patch from rovv.
30147 - Correct handling of possible malformed authority signing key
30148 certificates with internal signature types. Fixes bug 880.
30149 Bugfix on 0.2.0.3-alpha.
30150 - Fix a hard-to-trigger resource leak when logging credential status.
30152 - When we can't initialize DNS because the network is down, do not
30153 automatically stop Tor from starting. Instead, we retry failed
30154 dns_init() every 10 minutes, and change the exit policy to reject
30155 *:* until one succeeds. Fixes bug 691.
30156 - Use 64 bits instead of 32 bits for connection identifiers used with
30157 the controller protocol, to greatly reduce risk of identifier reuse.
30158 - When we're choosing an exit node for a circuit, and we have
30159 no pending streams, choose a good general exit rather than one that
30160 supports "all the pending streams". Bugfix on 0.1.1.x. Fix by rovv.
30161 - Fix another case of assuming, when a specific exit is requested,
30162 that we know more than the user about what hosts it allows.
30163 Fixes one case of bug 752. Patch from rovv.
30164 - Clip the MaxCircuitDirtiness config option to a minimum of 10
30165 seconds. Warn the user if lower values are given in the
30166 configuration. Bugfix on 0.1.0.1-rc. Patch by Sebastian.
30167 - Clip the CircuitBuildTimeout to a minimum of 30 seconds. Warn the
30168 user if lower values are given in the configuration. Bugfix on
30169 0.1.1.17-rc. Patch by Sebastian.
30170 - Fix a memory leak when we decline to add a v2 rendezvous descriptor to
30171 the cache because we already had a v0 descriptor with the same ID.
30172 Bugfix on 0.2.0.18-alpha.
30173 - Fix a race condition when freeing keys shared between main thread
30174 and CPU workers that could result in a memory leak. Bugfix on
30175 0.1.0.1-rc. Fixes bug 889.
30176 - Send a valid END cell back when a client tries to connect to a
30177 nonexistent hidden service port. Bugfix on 0.1.2.15. Fixes bug
30178 840. Patch from rovv.
30179 - Check which hops rendezvous stream cells are associated with to
30180 prevent possible guess-the-streamid injection attacks from
30181 intermediate hops. Fixes another case of bug 446. Based on patch
30183 - If a broken client asks a non-exit router to connect somewhere,
30184 do not even do the DNS lookup before rejecting the connection.
30185 Fixes another case of bug 619. Patch from rovv.
30186 - When a relay gets a create cell it can't decrypt (e.g. because it's
30187 using the wrong onion key), we were dropping it and letting the
30188 client time out. Now actually answer with a destroy cell. Fixes
30189 bug 904. Bugfix on 0.0.2pre8.
30191 o Minor bugfixes (hidden services):
30192 - Do not throw away existing introduction points on SIGHUP. Bugfix on
30193 0.0.6pre1. Patch by Karsten. Fixes bug 874.
30196 - Report the case where all signatures in a detached set are rejected
30197 differently than the case where there is an error handling the
30199 - When we realize that another process has modified our cached
30200 descriptors, print out a more useful error message rather than
30201 triggering an assertion. Fixes bug 885. Patch from Karsten.
30202 - Implement the 0x20 hack to better resist DNS poisoning: set the
30203 case on outgoing DNS requests randomly, and reject responses that do
30204 not match the case correctly. This logic can be disabled with the
30205 ServerDNSRandomizeCase setting, if you are using one of the 0.3%
30206 of servers that do not reliably preserve case in replies. See
30207 "Increased DNS Forgery Resistance through 0x20-Bit Encoding"
30209 - Check DNS replies for more matching fields to better resist DNS
30211 - Never use OpenSSL compression: it wastes RAM and CPU trying to
30212 compress cells, which are basically all encrypted, compressed, or
30216 Changes in version 0.2.1.11-alpha - 2009-01-20
30217 Tor 0.2.1.11-alpha finishes fixing the "if your Tor is off for a
30218 week it will take a long time to bootstrap again" bug. It also fixes
30219 an important security-related bug reported by Ilja van Sprundel. You
30220 should upgrade. (We'll send out more details about the bug once people
30221 have had some time to upgrade.)
30224 - Fix a heap-corruption bug that may be remotely triggerable on
30225 some platforms. Reported by Ilja van Sprundel.
30228 - Discard router descriptors as we load them if they are more than
30229 five days old. Otherwise if Tor is off for a long time and then
30230 starts with cached descriptors, it will try to use the onion
30231 keys in those obsolete descriptors when building circuits. Bugfix
30232 on 0.2.0.x. Fixes bug 887.
30235 - Try to make sure that the version of Libevent we're running with
30236 is binary-compatible with the one we built with. May address bug
30238 - Make setting ServerDNSRandomizeCase to 0 actually work. Bugfix
30239 for bug 905. Bugfix on 0.2.1.7-alpha.
30240 - Add a new --enable-local-appdata configuration switch to change
30241 the default location of the datadir on win32 from APPDATA to
30242 LOCAL_APPDATA. In the future, we should migrate to LOCAL_APPDATA
30243 entirely. Patch from coderman.
30246 - Make outbound DNS packets respect the OutboundBindAddress setting.
30247 Fixes the bug part of bug 798. Bugfix on 0.1.2.2-alpha.
30248 - When our circuit fails at the first hop (e.g. we get a destroy
30249 cell back), avoid using that OR connection anymore, and also
30250 tell all the one-hop directory requests waiting for it that they
30251 should fail. Bugfix on 0.2.1.3-alpha.
30252 - In the torify(1) manpage, mention that tsocks will leak your
30256 Changes in version 0.2.1.10-alpha - 2009-01-06
30257 Tor 0.2.1.10-alpha fixes two major bugs in bridge relays (one that
30258 would make the bridge relay not so useful if it had DirPort set to 0,
30259 and one that could let an attacker learn a little bit of information
30260 about the bridge's users), and a bug that would cause your Tor relay
30261 to ignore a circuit create request it can't decrypt (rather than reply
30262 with an error). It also fixes a wide variety of other bugs.
30265 - If the cached networkstatus consensus is more than five days old,
30266 discard it rather than trying to use it. In theory it could
30267 be useful because it lists alternate directory mirrors, but in
30268 practice it just means we spend many minutes trying directory
30269 mirrors that are long gone from the network. Helps bug 887 a bit;
30271 - Bridge relays that had DirPort set to 0 would stop fetching
30272 descriptors shortly after startup, and then briefly resume
30273 after a new bandwidth test and/or after publishing a new bridge
30274 descriptor. Bridge users that try to bootstrap from them would
30275 get a recent networkstatus but would get descriptors from up to
30276 18 hours earlier, meaning most of the descriptors were obsolete
30277 already. Reported by Tas; bugfix on 0.2.0.13-alpha.
30278 - Prevent bridge relays from serving their 'extrainfo' document
30279 to anybody who asks, now that extrainfo docs include potentially
30280 sensitive aggregated client geoip summaries. Bugfix on
30284 - New controller event "clients_seen" to report a geoip-based summary
30285 of which countries we've seen clients from recently. Now controllers
30286 like Vidalia can show bridge operators that they're actually making
30288 - Build correctly against versions of OpenSSL 0.9.8 or later built
30289 without support for deprecated functions.
30290 - Update to the "December 19 2008" ip-to-country file.
30292 o Minor bugfixes (on 0.2.0.x):
30293 - Authorities now vote for the Stable flag for any router whose
30294 weighted MTBF is at least 5 days, regardless of the mean MTBF.
30295 - Do not remove routers as too old if we do not have any consensus
30296 document. Bugfix on 0.2.0.7-alpha.
30297 - Do not accept incomplete ipv4 addresses (like 192.168.0) as valid.
30298 Spec conformance issue. Bugfix on Tor 0.0.2pre27.
30299 - When an exit relay resolves a stream address to a local IP address,
30300 do not just keep retrying that same exit relay over and
30301 over. Instead, just close the stream. Addresses bug 872. Bugfix
30302 on 0.2.0.32. Patch from rovv.
30303 - If a hidden service sends us an END cell, do not consider
30304 retrying the connection; just close it. Patch from rovv.
30305 - When we made bridge authorities stop serving bridge descriptors over
30306 unencrypted links, we also broke DirPort reachability testing for
30307 bridges. So bridges with a non-zero DirPort were printing spurious
30308 warns to their logs. Bugfix on 0.2.0.16-alpha. Fixes bug 709.
30309 - When a relay gets a create cell it can't decrypt (e.g. because it's
30310 using the wrong onion key), we were dropping it and letting the
30311 client time out. Now actually answer with a destroy cell. Fixes
30312 bug 904. Bugfix on 0.0.2pre8.
30313 - Squeeze 2-5% out of client performance (according to oprofile) by
30314 improving the implementation of some policy-manipulation functions.
30316 o Minor bugfixes (on 0.2.1.x):
30317 - Make get_interface_address() function work properly again; stop
30318 guessing the wrong parts of our address as our address.
30319 - Do not cannibalize a circuit if we're out of RELAY_EARLY cells to
30320 send on that circuit. Otherwise we might violate the proposal-110
30321 limit. Bugfix on 0.2.1.3-alpha. Partial fix for bug 878. Diagnosis
30323 - When we're sending non-EXTEND cells to the first hop in a circuit,
30324 for example to use an encrypted directory connection, we don't need
30325 to use RELAY_EARLY cells: the first hop knows what kind of cell
30326 it is, and nobody else can even see the cell type. Conserving
30327 RELAY_EARLY cells makes it easier to cannibalize circuits like
30329 - Stop logging nameserver addresses in reverse order.
30330 - If we are retrying a directory download slowly over and over, do
30331 not automatically give up after the 254th failure. Bugfix on
30333 - Resume reporting accurate "stream end" reasons to the local control
30334 port. They were lost in the changes for Proposal 148. Bugfix on
30337 o Deprecated and removed features:
30338 - The old "tor --version --version" command, which would print out
30339 the subversion "Id" of most of the source files, is now removed. It
30340 turned out to be less useful than we'd expected, and harder to
30343 o Code simplifications and refactoring:
30344 - Change our header file guard macros to be less likely to conflict
30345 with system headers. Adam Langley noticed that we were conflicting
30346 with log.h on Android.
30347 - Tool-assisted documentation cleanup. Nearly every function or
30348 static variable in Tor should have its own documentation now.
30351 Changes in version 0.2.1.9-alpha - 2008-12-25
30352 Tor 0.2.1.9-alpha fixes many more bugs, some of them security-related.
30354 o New directory authorities:
30355 - gabelmoo (the authority run by Karsten Loesing) now has a new
30359 - Never use a connection with a mismatched address to extend a
30360 circuit, unless that connection is canonical. A canonical
30361 connection is one whose address is authenticated by the router's
30362 identity key, either in a NETINFO cell or in a router descriptor.
30363 - Avoid a possible memory corruption bug when receiving hidden service
30364 descriptors. Bugfix on 0.2.1.6-alpha.
30367 - Fix a logic error that would automatically reject all but the first
30368 configured DNS server. Bugfix on 0.2.1.5-alpha. Possible fix for
30369 part of bug 813/868. Bug spotted by coderman.
30370 - When a stream at an exit relay is in state "resolving" or
30371 "connecting" and it receives an "end" relay cell, the exit relay
30372 would silently ignore the end cell and not close the stream. If
30373 the client never closes the circuit, then the exit relay never
30374 closes the TCP connection. Bug introduced in 0.1.2.1-alpha;
30375 reported by "wood".
30376 - When we can't initialize DNS because the network is down, do not
30377 automatically stop Tor from starting. Instead, retry failed
30378 dns_init() every 10 minutes, and change the exit policy to reject
30379 *:* until one succeeds. Fixes bug 691.
30382 - Give a better error message when an overzealous init script says
30383 "sudo -u username tor --user username". Makes Bug 882 easier for
30385 - When a directory authority gives us a new guess for our IP address,
30386 log which authority we used. Hopefully this will help us debug
30387 the recent complaints about bad IP address guesses.
30388 - Detect svn revision properly when we're using git-svn.
30389 - Try not to open more than one descriptor-downloading connection
30390 to an authority at once. This should reduce load on directory
30391 authorities. Fixes bug 366.
30392 - Add cross-certification to newly generated certificates, so that
30393 a signing key is enough information to look up a certificate.
30394 Partial implementation of proposal 157.
30395 - Start serving certificates by <identity digest, signing key digest>
30396 pairs. Partial implementation of proposal 157.
30397 - Clients now never report any stream end reason except 'MISC'.
30398 Implements proposal 148.
30399 - On platforms with a maximum syslog string length, truncate syslog
30400 messages to that length ourselves, rather than relying on the
30401 system to do it for us.
30402 - Optimize out calls to time(NULL) that occur for every IO operation,
30403 or for every cell. On systems where time() is a slow syscall,
30404 this fix will be slightly helpful.
30405 - Exit servers can now answer resolve requests for ip6.arpa addresses.
30406 - When we download a descriptor that we then immediately (as
30407 a directory authority) reject, do not retry downloading it right
30408 away. Should save some bandwidth on authorities. Fix for bug
30409 888. Patch by Sebastian Hahn.
30410 - When a download gets us zero good descriptors, do not notify
30411 Tor that new directory information has arrived.
30412 - Avoid some nasty corner cases in the logic for marking connections
30413 as too old or obsolete or noncanonical for circuits. Partial
30416 o Minor features (controller):
30417 - New CONSENSUS_ARRIVED event to note when a new consensus has
30418 been fetched and validated.
30419 - When we realize that another process has modified our cached
30420 descriptors file, print out a more useful error message rather
30421 than triggering an assertion. Fixes bug 885. Patch from Karsten.
30422 - Add an internal-use-only __ReloadTorrcOnSIGHUP option for
30423 controllers to prevent SIGHUP from reloading the
30424 configuration. Fixes bug 856.
30427 - Resume using the correct "REASON=" stream when telling the
30428 controller why we closed a stream. Bugfix in 0.2.1.1-alpha.
30429 - When a canonical connection appears later in our internal list
30430 than a noncanonical one for a given OR ID, always use the
30431 canonical one. Bugfix on 0.2.0.12-alpha. Fixes bug 805.
30433 - Clip the MaxCircuitDirtiness config option to a minimum of 10
30434 seconds. Warn the user if lower values are given in the
30435 configuration. Bugfix on 0.1.0.1-rc. Patch by Sebastian.
30436 - Clip the CircuitBuildTimeout to a minimum of 30 seconds. Warn the
30437 user if lower values are given in the configuration. Bugfix on
30438 0.1.1.17-rc. Patch by Sebastian.
30439 - Fix a race condition when freeing keys shared between main thread
30440 and CPU workers that could result in a memory leak. Bugfix on
30441 0.1.0.1-rc. Fixes bug 889.
30443 o Minor bugfixes (hidden services):
30444 - Do not throw away existing introduction points on SIGHUP (bugfix on
30445 0.0.6pre1); also, do not stall hidden services because we're
30446 throwing away introduction points; bugfix on 0.2.1.7-alpha. Spotted
30447 by John Brooks. Patch by Karsten. Fixes bug 874.
30448 - Fix a memory leak when we decline to add a v2 rendezvous
30449 descriptor to the cache because we already had a v0 descriptor
30450 with the same ID. Bugfix on 0.2.0.18-alpha.
30452 o Deprecated and removed features:
30453 - RedirectExits has been removed. It was deprecated since
30455 - Finally remove deprecated "EXTENDED_FORMAT" controller feature. It
30456 has been called EXTENDED_EVENTS since 0.1.2.4-alpha.
30457 - Cell pools are now always enabled; --disable-cell-pools is ignored.
30459 o Code simplifications and refactoring:
30460 - Rename the confusing or_is_obsolete field to the more appropriate
30461 is_bad_for_new_circs, and move it to or_connection_t where it
30463 - Move edge-only flags from connection_t to edge_connection_t: not
30464 only is this better coding, but on machines of plausible alignment,
30465 it should save 4-8 bytes per connection_t. "Every little bit helps."
30466 - Rename ServerDNSAllowBrokenResolvConf to ServerDNSAllowBrokenConfig
30467 for consistency; keep old option working for backward compatibility.
30468 - Simplify the code for finding connections to use for a circuit.
30471 Changes in version 0.2.1.8-alpha - 2008-12-08
30472 Tor 0.2.1.8-alpha fixes some crash bugs in earlier alpha releases,
30473 builds better on unusual platforms like Solaris and old OS X, and
30474 fixes a variety of other issues.
30477 - New DirPortFrontPage option that takes an html file and publishes
30478 it as "/" on the DirPort. Now relay operators can provide a
30479 disclaimer without needing to set up a separate webserver. There's
30480 a sample disclaimer in contrib/tor-exit-notice.html.
30483 - When the client is choosing entry guards, now it selects at most
30484 one guard from a given relay family. Otherwise we could end up with
30485 all of our entry points into the network run by the same operator.
30486 Suggested by Camilo Viecco. Fix on 0.1.1.11-alpha.
30489 - Fix a DOS opportunity during the voting signature collection process
30490 at directory authorities. Spotted by rovv. Bugfix on 0.2.0.x.
30491 - Fix a possible segfault when establishing an exit connection. Bugfix
30495 - Get file locking working on win32. Bugfix on 0.2.1.6-alpha. Fixes
30497 - Made Tor a little less aggressive about deleting expired
30498 certificates. Partial fix for bug 854.
30499 - Stop doing unaligned memory access that generated bus errors on
30500 sparc64. Bugfix on 0.2.0.10-alpha. Fix for bug 862.
30501 - Fix a crash bug when changing EntryNodes from the controller. Bugfix
30502 on 0.2.1.6-alpha. Fix for bug 867. Patched by Sebastian.
30503 - Make USR2 log-level switch take effect immediately. Bugfix on
30505 - If one win32 nameserver fails to get added, continue adding the
30506 rest, and don't automatically fail.
30507 - Use fcntl() for locking when flock() is not available. Should fix
30508 compilation on Solaris. Should fix Bug 873. Bugfix on 0.2.1.6-alpha.
30509 - Do not mark smartlist_bsearch_idx() function as ATTR_PURE. This bug
30510 could make gcc generate non-functional binary search code. Bugfix
30512 - Build correctly on platforms without socklen_t.
30513 - Avoid potential crash on internal error during signature collection.
30514 Fixes bug 864. Patch from rovv.
30515 - Do not use C's stdio library for writing to log files. This will
30516 improve logging performance by a minute amount, and will stop
30517 leaking fds when our disk is full. Fixes bug 861.
30518 - Stop erroneous use of O_APPEND in cases where we did not in fact
30519 want to re-seek to the end of a file before every last write().
30520 - Correct handling of possible malformed authority signing key
30521 certificates with internal signature types. Fixes bug 880. Bugfix
30523 - Fix a hard-to-trigger resource leak when logging credential status.
30527 - Directory mirrors no longer fetch the v1 directory or
30528 running-routers files. They are obsolete, and nobody asks for them
30529 anymore. This is the first step to making v1 authorities obsolete.
30531 o Minor features (controller):
30532 - Return circuit purposes in response to GETINFO circuit-status. Fixes
30536 Changes in version 0.2.0.32 - 2008-11-20
30537 Tor 0.2.0.32 fixes a major security problem in Debian and Ubuntu
30538 packages (and maybe other packages) noticed by Theo de Raadt, fixes
30539 a smaller security flaw that might allow an attacker to access local
30540 services, further improves hidden service performance, and fixes a
30541 variety of other issues.
30544 - The "User" and "Group" config options did not clear the
30545 supplementary group entries for the Tor process. The "User" option
30546 is now more robust, and we now set the groups to the specified
30547 user's primary group. The "Group" option is now ignored. For more
30548 detailed logging on credential switching, set CREDENTIAL_LOG_LEVEL
30549 in common/compat.c to LOG_NOTICE or higher. Patch by Jacob Appelbaum
30550 and Steven Murdoch. Bugfix on 0.0.2pre14. Fixes bug 848 and 857.
30551 - The "ClientDNSRejectInternalAddresses" config option wasn't being
30552 consistently obeyed: if an exit relay refuses a stream because its
30553 exit policy doesn't allow it, we would remember what IP address
30554 the relay said the destination address resolves to, even if it's
30555 an internal IP address. Bugfix on 0.2.0.7-alpha; patch by rovv.
30558 - Fix a DOS opportunity during the voting signature collection process
30559 at directory authorities. Spotted by rovv. Bugfix on 0.2.0.x.
30561 o Major bugfixes (hidden services):
30562 - When fetching v0 and v2 rendezvous service descriptors in parallel,
30563 we were failing the whole hidden service request when the v0
30564 descriptor fetch fails, even if the v2 fetch is still pending and
30565 might succeed. Similarly, if the last v2 fetch fails, we were
30566 failing the whole hidden service request even if a v0 fetch is
30567 still pending. Fixes bug 814. Bugfix on 0.2.0.10-alpha.
30568 - When extending a circuit to a hidden service directory to upload a
30569 rendezvous descriptor using a BEGIN_DIR cell, almost 1/6 of all
30570 requests failed, because the router descriptor has not been
30571 downloaded yet. In these cases, do not attempt to upload the
30572 rendezvous descriptor, but wait until the router descriptor is
30573 downloaded and retry. Likewise, do not attempt to fetch a rendezvous
30574 descriptor from a hidden service directory for which the router
30575 descriptor has not yet been downloaded. Fixes bug 767. Bugfix
30579 - Fix several infrequent memory leaks spotted by Coverity.
30580 - When testing for libevent functions, set the LDFLAGS variable
30581 correctly. Found by Riastradh.
30582 - Avoid a bug where the FastFirstHopPK 0 option would keep Tor from
30583 bootstrapping with tunneled directory connections. Bugfix on
30584 0.1.2.5-alpha. Fixes bug 797. Found by Erwin Lam.
30585 - When asked to connect to A.B.exit:80, if we don't know the IP for A
30586 and we know that server B rejects most-but-not all connections to
30587 port 80, we would previously reject the connection. Now, we assume
30588 the user knows what they were asking for. Fixes bug 752. Bugfix
30589 on 0.0.9rc5. Diagnosed by BarkerJr.
30590 - If we overrun our per-second write limits a little, count this as
30591 having used up our write allocation for the second, and choke
30592 outgoing directory writes. Previously, we had only counted this when
30593 we had met our limits precisely. Fixes bug 824. Patch from by rovv.
30594 Bugfix on 0.2.0.x (??).
30595 - Remove the old v2 directory authority 'lefkada' from the default
30596 list. It has been gone for many months.
30597 - Stop doing unaligned memory access that generated bus errors on
30598 sparc64. Bugfix on 0.2.0.10-alpha. Fixes bug 862.
30599 - Make USR2 log-level switch take effect immediately. Bugfix on
30602 o Minor bugfixes (controller):
30603 - Make DNS resolved events into "CLOSED", not "FAILED". Bugfix on
30604 0.1.2.5-alpha. Fix by Robert Hogan. Resolves bug 807.
30607 Changes in version 0.2.1.7-alpha - 2008-11-08
30608 Tor 0.2.1.7-alpha fixes a major security problem in Debian and Ubuntu
30609 packages (and maybe other packages) noticed by Theo de Raadt, fixes
30610 a smaller security flaw that might allow an attacker to access local
30611 services, adds better defense against DNS poisoning attacks on exit
30612 relays, further improves hidden service performance, and fixes a
30613 variety of other issues.
30616 - The "ClientDNSRejectInternalAddresses" config option wasn't being
30617 consistently obeyed: if an exit relay refuses a stream because its
30618 exit policy doesn't allow it, we would remember what IP address
30619 the relay said the destination address resolves to, even if it's
30620 an internal IP address. Bugfix on 0.2.0.7-alpha; patch by rovv.
30621 - The "User" and "Group" config options did not clear the
30622 supplementary group entries for the Tor process. The "User" option
30623 is now more robust, and we now set the groups to the specified
30624 user's primary group. The "Group" option is now ignored. For more
30625 detailed logging on credential switching, set CREDENTIAL_LOG_LEVEL
30626 in common/compat.c to LOG_NOTICE or higher. Patch by Jacob Appelbaum
30627 and Steven Murdoch. Bugfix on 0.0.2pre14. Fixes bug 848.
30628 - Do not use or believe expired v3 authority certificates. Patch
30629 from Karsten. Bugfix in 0.2.0.x. Fixes bug 851.
30632 - Now NodeFamily and MyFamily config options allow spaces in
30633 identity fingerprints, so it's easier to paste them in.
30634 Suggested by Lucky Green.
30635 - Implement the 0x20 hack to better resist DNS poisoning: set the
30636 case on outgoing DNS requests randomly, and reject responses that do
30637 not match the case correctly. This logic can be disabled with the
30638 ServerDNSRandomizeCase setting, if you are using one of the 0.3%
30639 of servers that do not reliably preserve case in replies. See
30640 "Increased DNS Forgery Resistance through 0x20-Bit Encoding"
30642 - Preserve case in replies to DNSPort requests in order to support
30643 the 0x20 hack for resisting DNS poisoning attacks.
30645 o Hidden service performance improvements:
30646 - When the client launches an introduction circuit, retry with a
30647 new circuit after 30 seconds rather than 60 seconds.
30648 - Launch a second client-side introduction circuit in parallel
30649 after a delay of 15 seconds (based on work by Christian Wilms).
30650 - Hidden services start out building five intro circuits rather
30651 than three, and when the first three finish they publish a service
30652 descriptor using those. Now we publish our service descriptor much
30653 faster after restart.
30656 - Minor fix in the warning messages when you're having problems
30657 bootstrapping; also, be more forgiving of bootstrap problems when
30658 we're still making incremental progress on a given bootstrap phase.
30659 - When we're choosing an exit node for a circuit, and we have
30660 no pending streams, choose a good general exit rather than one that
30661 supports "all the pending streams". Bugfix on 0.1.1.x. Fix by rovv.
30662 - Send a valid END cell back when a client tries to connect to a
30663 nonexistent hidden service port. Bugfix on 0.1.2.15. Fixes bug
30664 840. Patch from rovv.
30665 - If a broken client asks a non-exit router to connect somewhere,
30666 do not even do the DNS lookup before rejecting the connection.
30667 Fixes another case of bug 619. Patch from rovv.
30668 - Fix another case of assuming, when a specific exit is requested,
30669 that we know more than the user about what hosts it allows.
30670 Fixes another case of bug 752. Patch from rovv.
30671 - Check which hops rendezvous stream cells are associated with to
30672 prevent possible guess-the-streamid injection attacks from
30673 intermediate hops. Fixes another case of bug 446. Based on patch
30675 - Avoid using a negative right-shift when comparing 32-bit
30676 addresses. Possible fix for bug 845 and bug 811.
30677 - Make the assert_circuit_ok() function work correctly on circuits that
30678 have already been marked for close.
30679 - Fix read-off-the-end-of-string error in unit tests when decoding
30680 introduction points.
30681 - Fix uninitialized size field for memory area allocation: may improve
30682 memory performance during directory parsing.
30683 - Treat duplicate certificate fetches as failures, so that we do
30684 not try to re-fetch an expired certificate over and over and over.
30685 - Do not say we're fetching a certificate when we'll in fact skip it
30686 because of a pending download.
30689 Changes in version 0.2.1.6-alpha - 2008-09-30
30690 Tor 0.2.1.6-alpha further improves performance and robustness of
30691 hidden services, starts work on supporting per-country relay selection,
30692 and fixes a variety of smaller issues.
30695 - Implement proposal 121: make it possible to build hidden services
30696 that only certain clients are allowed to connect to. This is
30697 enforced at several points, so that unauthorized clients are unable
30698 to send INTRODUCE cells to the service, or even (depending on the
30699 type of authentication) to learn introduction points. This feature
30700 raises the bar for certain kinds of active attacks against hidden
30701 services. Code by Karsten Loesing.
30702 - Relays now store and serve v2 hidden service descriptors by default,
30703 i.e., the new default value for HidServDirectoryV2 is 1. This is
30704 the last step in proposal 114, which aims to make hidden service
30705 lookups more reliable.
30706 - Start work to allow node restrictions to include country codes. The
30707 syntax to exclude nodes in a country with country code XX is
30708 "ExcludeNodes {XX}". Patch from Robert Hogan. It still needs some
30709 refinement to decide what config options should take priority if
30710 you ask to both use a particular node and exclude it.
30711 - Allow ExitNodes list to include IP ranges and country codes, just
30712 like the Exclude*Nodes lists. Patch from Robert Hogan.
30715 - Fix a bug when parsing ports in tor_addr_port_parse() that caused
30716 Tor to fail to start if you had it configured to use a bridge
30717 relay. Fixes bug 809. Bugfix on 0.2.1.5-alpha.
30718 - When extending a circuit to a hidden service directory to upload a
30719 rendezvous descriptor using a BEGIN_DIR cell, almost 1/6 of all
30720 requests failed, because the router descriptor had not been
30721 downloaded yet. In these cases, we now wait until the router
30722 descriptor is downloaded, and then retry. Likewise, clients
30723 now skip over a hidden service directory if they don't yet have
30724 its router descriptor, rather than futilely requesting it and
30725 putting mysterious complaints in the logs. Fixes bug 767. Bugfix
30727 - When fetching v0 and v2 rendezvous service descriptors in parallel,
30728 we were failing the whole hidden service request when the v0
30729 descriptor fetch fails, even if the v2 fetch is still pending and
30730 might succeed. Similarly, if the last v2 fetch fails, we were
30731 failing the whole hidden service request even if a v0 fetch is
30732 still pending. Fixes bug 814. Bugfix on 0.2.0.10-alpha.
30733 - DNS replies need to have names matching their requests, but
30734 these names should be in the questions section, not necessarily
30735 in the answers section. Fixes bug 823. Bugfix on 0.2.1.5-alpha.
30738 - Update to the "September 1 2008" ip-to-country file.
30739 - Allow ports 465 and 587 in the default exit policy again. We had
30740 rejected them in 0.1.0.15, because back in 2005 they were commonly
30741 misconfigured and ended up as spam targets. We hear they are better
30742 locked down these days.
30743 - Use a lockfile to make sure that two Tor processes are not
30744 simultaneously running with the same datadir.
30745 - Serve the latest v3 networkstatus consensus via the control
30746 port. Use "getinfo dir/status-vote/current/consensus" to fetch it.
30747 - Better logging about stability/reliability calculations on directory
30749 - Drop the requirement to have an open dir port for storing and
30750 serving v2 hidden service descriptors.
30751 - Directory authorities now serve a /tor/dbg-stability.txt URL to
30752 help debug WFU and MTBF calculations.
30753 - Implement most of Proposal 152: allow specialized servers to permit
30754 single-hop circuits, and clients to use those servers to build
30755 single-hop circuits when using a specialized controller. Patch
30756 from Josh Albrecht. Resolves feature request 768.
30757 - Add a -p option to tor-resolve for specifying the SOCKS port: some
30758 people find host:port too confusing.
30759 - Make TrackHostExit mappings expire a while after their last use, not
30760 after their creation. Patch from Robert Hogan.
30761 - Provide circuit purposes along with circuit events to the controller.
30764 - Fix compile on OpenBSD 4.4-current. Bugfix on 0.2.1.5-alpha.
30766 - Fixed some memory leaks -- some quite frequent, some almost
30767 impossible to trigger -- based on results from Coverity.
30768 - When testing for libevent functions, set the LDFLAGS variable
30769 correctly. Found by Riastradh.
30770 - Fix an assertion bug in parsing policy-related options; possible fix
30772 - Catch and report a few more bootstrapping failure cases when Tor
30773 fails to establish a TCP connection. Cleanup on 0.2.1.x.
30774 - Avoid a bug where the FastFirstHopPK 0 option would keep Tor from
30775 bootstrapping with tunneled directory connections. Bugfix on
30776 0.1.2.5-alpha. Fixes bug 797. Found by Erwin Lam.
30777 - When asked to connect to A.B.exit:80, if we don't know the IP for A
30778 and we know that server B rejects most-but-not all connections to
30779 port 80, we would previously reject the connection. Now, we assume
30780 the user knows what they were asking for. Fixes bug 752. Bugfix
30781 on 0.0.9rc5. Diagnosed by BarkerJr.
30782 - If we are not using BEGIN_DIR cells, don't attempt to contact hidden
30783 service directories if they have no advertised dir port. Bugfix
30785 - If we overrun our per-second write limits a little, count this as
30786 having used up our write allocation for the second, and choke
30787 outgoing directory writes. Previously, we had only counted this when
30788 we had met our limits precisely. Fixes bug 824. Patch by rovv.
30789 Bugfix on 0.2.0.x (??).
30790 - Avoid a "0 divided by 0" calculation when calculating router uptime
30791 at directory authorities. Bugfix on 0.2.0.8-alpha.
30792 - Make DNS resolved controller events into "CLOSED", not
30793 "FAILED". Bugfix on 0.1.2.5-alpha. Fix by Robert Hogan. Resolves
30795 - Fix a bug where an unreachable relay would establish enough
30796 reachability testing circuits to do a bandwidth test -- if
30797 we already have a connection to the middle hop of the testing
30798 circuit, then it could establish the last hop by using the existing
30799 connection. Bugfix on 0.1.2.2-alpha, exposed when we made testing
30800 circuits no longer use entry guards in 0.2.1.3-alpha.
30801 - If we have correct permissions on $datadir, we complain to stdout
30802 and fail to start. But dangerous permissions on
30803 $datadir/cached-status/ would cause us to open a log and complain
30804 there. Now complain to stdout and fail to start in both cases. Fixes
30805 bug 820, reported by seeess.
30806 - Remove the old v2 directory authority 'lefkada' from the default
30807 list. It has been gone for many months.
30809 o Code simplifications and refactoring:
30810 - Revise the connection_new functions so that a more typesafe variant
30811 exists. This will work better with Coverity, and let us find any
30812 actual mistakes we're making here.
30813 - Refactor unit testing logic so that dmalloc can be used sensibly
30814 with unit tests to check for memory leaks.
30815 - Move all hidden-service related fields from connection and circuit
30816 structure to substructures: this way they won't eat so much memory.
30819 Changes in version 0.2.0.31 - 2008-09-03
30820 Tor 0.2.0.31 addresses two potential anonymity issues, starts to fix
30821 a big bug we're seeing where in rare cases traffic from one Tor stream
30822 gets mixed into another stream, and fixes a variety of smaller issues.
30825 - Make sure that two circuits can never exist on the same connection
30826 with the same circuit ID, even if one is marked for close. This
30827 is conceivably a bugfix for bug 779. Bugfix on 0.1.0.4-rc.
30828 - Relays now reject risky extend cells: if the extend cell includes
30829 a digest of all zeroes, or asks to extend back to the relay that
30830 sent the extend cell, tear down the circuit. Ideas suggested
30832 - If not enough of our entry guards are available so we add a new
30833 one, we might use the new one even if it overlapped with the
30834 current circuit's exit relay (or its family). Anonymity bugfix
30835 pointed out by rovv.
30838 - Recover 3-7 bytes that were wasted per memory chunk. Fixes bug
30839 794; bug spotted by rovv. Bugfix on 0.2.0.1-alpha.
30840 - Correctly detect the presence of the linux/netfilter_ipv4.h header
30841 when building against recent kernels. Bugfix on 0.1.2.1-alpha.
30842 - Pick size of default geoip filename string correctly on windows.
30843 Fixes bug 806. Bugfix on 0.2.0.30.
30844 - Make the autoconf script accept the obsolete --with-ssl-dir
30845 option as an alias for the actually-working --with-openssl-dir
30846 option. Fix the help documentation to recommend --with-openssl-dir.
30847 Based on a patch by "Dave". Bugfix on 0.2.0.1-alpha.
30848 - When using the TransPort option on OpenBSD, and using the User
30849 option to change UID and drop privileges, make sure to open
30850 /dev/pf before dropping privileges. Fixes bug 782. Patch from
30851 Christopher Davis. Bugfix on 0.1.2.1-alpha.
30852 - Try to attach connections immediately upon receiving a RENDEZVOUS2
30853 or RENDEZVOUS_ESTABLISHED cell. This can save a second or two
30854 on the client side when connecting to a hidden service. Bugfix
30855 on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743.
30856 - When closing an application-side connection because its circuit is
30857 getting torn down, generate the stream event correctly. Bugfix on
30858 0.1.2.x. Anonymous patch.
30861 Changes in version 0.2.1.5-alpha - 2008-08-31
30862 Tor 0.2.1.5-alpha moves us closer to handling IPv6 destinations, puts
30863 in a lot of the infrastructure for adding authorization to hidden
30864 services, lays the groundwork for having clients read their load
30865 balancing information out of the networkstatus consensus rather than
30866 the individual router descriptors, addresses two potential anonymity
30867 issues, and fixes a variety of smaller issues.
30870 - Convert many internal address representations to optionally hold
30872 - Generate and accept IPv6 addresses in many protocol elements.
30873 - Make resolver code handle nameservers located at ipv6 addresses.
30874 - Begin implementation of proposal 121 ("Client authorization for
30875 hidden services"): configure hidden services with client
30876 authorization, publish descriptors for them, and configure
30877 authorization data for hidden services at clients. The next
30878 step is to actually access hidden services that perform client
30880 - More progress toward proposal 141: Network status consensus
30881 documents and votes now contain bandwidth information for each
30882 router and a summary of that router's exit policy. Eventually this
30883 will be used by clients so that they do not have to download every
30884 known descriptor before building circuits.
30886 o Major bugfixes (on 0.2.0.x and before):
30887 - When sending CREATED cells back for a given circuit, use a 64-bit
30888 connection ID to find the right connection, rather than an addr:port
30889 combination. Now that we can have multiple OR connections between
30890 the same ORs, it is no longer possible to use addr:port to uniquely
30891 identify a connection.
30892 - Relays now reject risky extend cells: if the extend cell includes
30893 a digest of all zeroes, or asks to extend back to the relay that
30894 sent the extend cell, tear down the circuit. Ideas suggested
30896 - If not enough of our entry guards are available so we add a new
30897 one, we might use the new one even if it overlapped with the
30898 current circuit's exit relay (or its family). Anonymity bugfix
30899 pointed out by rovv.
30902 - Recover 3-7 bytes that were wasted per memory chunk. Fixes bug
30903 794; bug spotted by rovv. Bugfix on 0.2.0.1-alpha.
30904 - When using the TransPort option on OpenBSD, and using the User
30905 option to change UID and drop privileges, make sure to open /dev/pf
30906 before dropping privileges. Fixes bug 782. Patch from Christopher
30907 Davis. Bugfix on 0.1.2.1-alpha.
30908 - Correctly detect the presence of the linux/netfilter_ipv4.h header
30909 when building against recent kernels. Bugfix on 0.1.2.1-alpha.
30910 - Add a missing safe_str() call for a debug log message.
30911 - Use 64 bits instead of 32 bits for connection identifiers used with
30912 the controller protocol, to greatly reduce risk of identifier reuse.
30913 - Make the autoconf script accept the obsolete --with-ssl-dir
30914 option as an alias for the actually-working --with-openssl-dir
30915 option. Fix the help documentation to recommend --with-openssl-dir.
30916 Based on a patch by "Dave". Bugfix on 0.2.0.1-alpha.
30919 - Rate-limit too-many-sockets messages: when they happen, they happen
30920 a lot. Resolves bug 748.
30921 - Resist DNS poisoning a little better by making sure that names in
30922 answer sections match.
30923 - Print the SOCKS5 error message string as well as the error code
30924 when a tor-resolve request fails. Patch from Jacob.
30927 Changes in version 0.2.1.4-alpha - 2008-08-04
30928 Tor 0.2.1.4-alpha fixes a pair of crash bugs in 0.2.1.3-alpha.
30931 - The address part of exit policies was not correctly written
30932 to router descriptors. This generated router descriptors that failed
30933 their self-checks. Noticed by phobos, fixed by Karsten. Bugfix
30935 - Tor triggered a false assert when extending a circuit to a relay
30936 but we already have a connection open to that relay. Noticed by
30937 phobos, fixed by Karsten. Bugfix on 0.2.1.3-alpha.
30940 - Fix a hidden service logging bug: in some edge cases, the router
30941 descriptor of a previously picked introduction point becomes
30942 obsolete and we need to give up on it rather than continually
30943 complaining that it has become obsolete. Observed by xiando. Bugfix
30946 o Removed features:
30947 - Take out the TestVia config option, since it was a workaround for
30948 a bug that was fixed in Tor 0.1.1.21.
30951 Changes in version 0.2.1.3-alpha - 2008-08-03
30952 Tor 0.2.1.3-alpha implements most of the pieces to prevent
30953 infinite-length circuit attacks (see proposal 110); fixes a bug that
30954 might cause exit relays to corrupt streams they send back; allows
30955 address patterns (e.g. 255.128.0.0/16) to appear in ExcludeNodes and
30956 ExcludeExitNodes config options; and fixes a big pile of bugs.
30958 o Bootstrapping bugfixes (on 0.2.1.x-alpha):
30959 - Send a bootstrap problem "warn" event on the first problem if the
30960 reason is NO_ROUTE (that is, our network is down).
30963 - Implement most of proposal 110: The first K cells to be sent
30964 along a circuit are marked as special "early" cells; only K "early"
30965 cells will be allowed. Once this code is universal, we can block
30966 certain kinds of DOS attack by requiring that EXTEND commands must
30967 be sent using an "early" cell.
30970 - Try to attach connections immediately upon receiving a RENDEZVOUS2
30971 or RENDEZVOUS_ESTABLISHED cell. This can save a second or two
30972 on the client side when connecting to a hidden service. Bugfix
30973 on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743.
30974 - Ensure that two circuits can never exist on the same connection
30975 with the same circuit ID, even if one is marked for close. This
30976 is conceivably a bugfix for bug 779; fixes a bug on 0.1.0.4-rc.
30979 - When relays do their initial bandwidth measurement, don't limit
30980 to just our entry guards for the test circuits. Otherwise we tend
30981 to have multiple test circuits going through a single entry guard,
30982 which makes our bandwidth test less accurate. Fixes part of bug 654;
30983 patch contributed by Josh Albrecht.
30984 - Add an ExcludeExitNodes option so users can list a set of nodes
30985 that should be be excluded from the exit node position, but
30986 allowed elsewhere. Implements proposal 151.
30987 - Allow address patterns (e.g., 255.128.0.0/16) to appear in
30988 ExcludeNodes and ExcludeExitNodes lists.
30989 - Change the implementation of ExcludeNodes and ExcludeExitNodes to
30990 be more efficient. Formerly it was quadratic in the number of
30991 servers; now it should be linear. Fixes bug 509.
30992 - Save 16-22 bytes per open circuit by moving the n_addr, n_port,
30993 and n_conn_id_digest fields into a separate structure that's
30994 only needed when the circuit has not yet attached to an n_conn.
30997 - Change the contrib/tor.logrotate script so it makes the new
30998 logs as "_tor:_tor" rather than the default, which is generally
30999 "root:wheel". Fixes bug 676, reported by Serge Koksharov.
31000 - Stop using __attribute__((nonnull)) with GCC: it can give us useful
31001 warnings (occasionally), but it can also cause the compiler to
31002 eliminate error-checking code. Suggested by Peter Gutmann.
31003 - When a hidden service is giving up on an introduction point candidate
31004 that was not included in the last published rendezvous descriptor,
31005 don't reschedule publication of the next descriptor. Fixes bug 763.
31007 - Mark RendNodes, RendExcludeNodes, HiddenServiceNodes, and
31008 HiddenServiceExcludeNodes as obsolete: they never worked properly,
31009 and nobody claims to be using them. Fixes bug 754. Bugfix on
31010 0.1.0.1-rc. Patch from Christian Wilms.
31011 - Fix a small alignment and memory-wasting bug on buffer chunks.
31014 o Minor bugfixes (controller):
31015 - When closing an application-side connection because its circuit
31016 is getting torn down, generate the stream event correctly.
31017 Bugfix on 0.1.2.x. Anonymous patch.
31019 o Removed features:
31020 - Remove all backward-compatibility code to support relays running
31021 versions of Tor so old that they no longer work at all on the
31025 Changes in version 0.2.0.30 - 2008-07-15
31027 - Stop using __attribute__((nonnull)) with GCC: it can give us useful
31028 warnings (occasionally), but it can also cause the compiler to
31029 eliminate error-checking code. Suggested by Peter Gutmann.
31032 Changes in version 0.2.0.29-rc - 2008-07-08
31033 Tor 0.2.0.29-rc fixes two big bugs with using bridges, fixes more
31034 hidden-service performance bugs, and fixes a bunch of smaller bugs.
31037 - If you have more than one bridge but don't know their keys,
31038 you would only launch a request for the descriptor of the first one
31039 on your list. (Tor considered launching requests for the others, but
31040 found that it already had a connection on the way for $0000...0000
31041 so it didn't open another.) Bugfix on 0.2.0.x.
31042 - If you have more than one bridge but don't know their keys, and the
31043 connection to one of the bridges failed, you would cancel all
31044 pending bridge connections. (After all, they all have the same
31045 digest.) Bugfix on 0.2.0.x.
31046 - When a hidden service was trying to establish an introduction point,
31047 and Tor had built circuits preemptively for such purposes, we
31048 were ignoring all the preemptive circuits and launching a new one
31049 instead. Bugfix on 0.2.0.14-alpha.
31050 - When a hidden service was trying to establish an introduction point,
31051 and Tor *did* manage to reuse one of the preemptively built
31052 circuits, it didn't correctly remember which one it used,
31053 so it asked for another one soon after, until there were no
31054 more preemptive circuits, at which point it launched one from
31055 scratch. Bugfix on 0.0.9.x.
31056 - Make directory servers include the X-Your-Address-Is: http header in
31057 their responses even for begin_dir conns. Now clients who only
31058 ever use begin_dir connections still have a way to learn their IP
31059 address. Fixes bug 737; bugfix on 0.2.0.22-rc. Reported by goldy.
31062 - Fix a macro/CPP interaction that was confusing some compilers:
31063 some GCCs don't like #if/#endif pairs inside macro arguments.
31065 - Fix macro collision between OpenSSL 0.9.8h and Windows headers.
31066 Fixes bug 704; fix from Steven Murdoch.
31067 - When opening /dev/null in finish_daemonize(), do not pass the
31068 O_CREAT flag. Fortify was complaining, and correctly so. Fixes
31069 bug 742; fix from Michael Scherer. Bugfix on 0.0.2pre19.
31070 - Correctly detect transparent proxy support on Linux hosts that
31071 require in.h to be included before netfilter_ipv4.h. Patch
31073 - Disallow session resumption attempts during the renegotiation
31074 stage of the v2 handshake protocol. Clients should never be trying
31075 session resumption at this point, but apparently some did, in
31076 ways that caused the handshake to fail. Bugfix on 0.2.0.20-rc. Bug
31077 found by Geoff Goodell.
31080 Changes in version 0.2.1.2-alpha - 2008-06-20
31081 Tor 0.2.1.2-alpha includes a new "TestingTorNetwork" config option to
31082 make it easier to set up your own private Tor network; fixes several
31083 big bugs with using more than one bridge relay; fixes a big bug with
31084 offering hidden services quickly after Tor starts; and uses a better
31085 API for reporting potential bootstrapping problems to the controller.
31088 - New TestingTorNetwork config option to allow adjustment of
31089 previously constant values that, while reasonable, could slow
31090 bootstrapping. Implements proposal 135. Patch from Karsten.
31093 - If you have more than one bridge but don't know their digests,
31094 you would only learn a request for the descriptor of the first one
31095 on your list. (Tor considered launching requests for the others, but
31096 found that it already had a connection on the way for $0000...0000
31097 so it didn't open another.) Bugfix on 0.2.0.x.
31098 - If you have more than one bridge but don't know their digests,
31099 and the connection to one of the bridges failed, you would cancel
31100 all pending bridge connections. (After all, they all have the
31101 same digest.) Bugfix on 0.2.0.x.
31102 - When establishing a hidden service, introduction points that
31103 originate from cannibalized circuits are completely ignored and not
31104 included in rendezvous service descriptors. This might be another
31105 reason for delay in making a hidden service available. Bugfix
31106 from long ago (0.0.9.x?)
31109 - Allow OpenSSL to use dynamic locks if it wants.
31110 - When building a consensus, do not include routers that are down.
31111 This will cut down 30% to 40% on consensus size. Implements
31113 - In directory authorities' approved-routers files, allow
31114 fingerprints with or without space.
31115 - Add a "GETINFO /status/bootstrap-phase" controller option, so the
31116 controller can query our current bootstrap state in case it attaches
31117 partway through and wants to catch up.
31118 - Send an initial "Starting" bootstrap status event, so we have a
31119 state to start out in.
31122 - Asking for a conditional consensus at .../consensus/<fingerprints>
31123 would crash a dirserver if it did not already have a
31124 consensus. Bugfix on 0.2.1.1-alpha.
31125 - Clean up some macro/CPP interactions: some GCC versions don't like
31126 #if/#endif pairs inside macro arguments. Fixes bug 707. Bugfix on
31129 o Bootstrapping bugfixes (on 0.2.1.1-alpha):
31130 - Directory authorities shouldn't complain about bootstrapping
31131 problems just because they do a lot of reachability testing and
31132 some of the connection attempts fail.
31133 - Start sending "count" and "recommendation" key/value pairs in
31134 bootstrap problem status events, so the controller can hear about
31135 problems even before Tor decides they're worth reporting for sure.
31136 - If you're using bridges, generate "bootstrap problem" warnings
31137 as soon as you run out of working bridges, rather than waiting
31138 for ten failures -- which will never happen if you have less than
31140 - If we close our OR connection because there's been a circuit
31141 pending on it for too long, we were telling our bootstrap status
31142 events "REASON=NONE". Now tell them "REASON=TIMEOUT".
31145 Changes in version 0.2.1.1-alpha - 2008-06-13
31146 Tor 0.2.1.1-alpha fixes a lot of memory fragmentation problems that
31147 were making the Tor process bloat especially on Linux; makes our TLS
31148 handshake blend in better; sends "bootstrap phase" status events to
31149 the controller, so it can keep the user informed of progress (and
31150 problems) fetching directory information and establishing circuits;
31151 and adds a variety of smaller features.
31154 - More work on making our TLS handshake blend in: modify the list
31155 of ciphers advertised by OpenSSL in client mode to even more
31156 closely resemble a common web browser. We cheat a little so that
31157 we can advertise ciphers that the locally installed OpenSSL doesn't
31159 - Start sending "bootstrap phase" status events to the controller,
31160 so it can keep the user informed of progress fetching directory
31161 information and establishing circuits. Also inform the controller
31162 if we think we're stuck at a particular bootstrap phase. Implements
31164 - Resume using OpenSSL's RAND_poll() for better (and more portable)
31165 cross-platform entropy collection again. We used to use it, then
31166 stopped using it because of a bug that could crash systems that
31167 called RAND_poll when they had a lot of fds open. It looks like the
31168 bug got fixed in late 2006. Our new behavior is to call RAND_poll()
31169 at startup, and to call RAND_poll() when we reseed later only if
31170 we have a non-buggy OpenSSL version.
31173 - When we choose to abandon a new entry guard because we think our
31174 older ones might be better, close any circuits pending on that
31175 new entry guard connection. This fix should make us recover much
31176 faster when our network is down and then comes back. Bugfix on
31177 0.1.2.8-beta; found by lodger.
31179 o Memory fixes and improvements:
31180 - Add a malloc_good_size implementation to OpenBSD_malloc_linux.c,
31181 to avoid unused RAM in buffer chunks and memory pools.
31182 - Speed up parsing and cut down on memory fragmentation by using
31183 stack-style allocations for parsing directory objects. Previously,
31184 this accounted for over 40% of allocations from within Tor's code
31185 on a typical directory cache.
31186 - Use a Bloom filter rather than a digest-based set to track which
31187 descriptors we need to keep around when we're cleaning out old
31188 router descriptors. This speeds up the computation significantly,
31189 and may reduce fragmentation.
31190 - Reduce the default smartlist size from 32 to 16; it turns out that
31191 most smartlists hold around 8-12 elements tops.
31192 - Make dumpstats() log the fullness and size of openssl-internal
31194 - If the user has applied the experimental SSL_MODE_RELEASE_BUFFERS
31195 patch to their OpenSSL, turn it on to save memory on servers. This
31196 patch will (with any luck) get included in a mainline distribution
31198 - Never use OpenSSL compression: it wastes RAM and CPU trying to
31199 compress cells, which are basically all encrypted, compressed,
31203 - Stop reloading the router list from disk for no reason when we
31204 run out of reachable directory mirrors. Once upon a time reloading
31205 it would set the 'is_running' flag back to 1 for them. It hasn't
31206 done that for a long time.
31207 - In very rare situations new hidden service descriptors were
31208 published earlier than 30 seconds after the last change to the
31209 service. (We currently think that a hidden service descriptor
31210 that's been stable for 30 seconds is worth publishing.)
31213 - Allow separate log levels to be configured for different logging
31214 domains. For example, this allows one to log all notices, warnings,
31215 or errors, plus all memory management messages of level debug or
31216 higher, with: Log [MM] debug-err [*] notice-err file /var/log/tor.
31217 - Add a couple of extra warnings to --enable-gcc-warnings for GCC 4.3,
31218 and stop using a warning that had become unfixably verbose under
31220 - New --hush command-line option similar to --quiet. While --quiet
31221 disables all logging to the console on startup, --hush limits the
31222 output to messages of warning and error severity.
31223 - Servers support a new URL scheme for consensus downloads that
31224 allows the client to specify which authorities are trusted.
31225 The server then only sends the consensus if the client will trust
31226 it. Otherwise a 404 error is sent back. Clients use this
31227 new scheme when the server supports it (meaning it's running
31228 0.2.1.1-alpha or later). Implements proposal 134.
31229 - New configure/torrc options (--enable-geoip-stats,
31230 DirRecordUsageByCountry) to record how many IPs we've served
31231 directory info to in each country code, how many status documents
31232 total we've sent to each country code, and what share of the total
31233 directory requests we should expect to see.
31234 - Use the TLS1 hostname extension to more closely resemble browser
31236 - Lots of new unit tests.
31237 - Add a macro to implement the common pattern of iterating through
31238 two parallel lists in lockstep.
31241 Changes in version 0.2.0.28-rc - 2008-06-13
31242 Tor 0.2.0.28-rc fixes an anonymity-related bug, fixes a hidden-service
31243 performance bug, and fixes a bunch of smaller bugs.
31246 - Fix a bug where, when we were choosing the 'end stream reason' to
31247 put in our relay end cell that we send to the exit relay, Tor
31248 clients on Windows were sometimes sending the wrong 'reason'. The
31249 anonymity problem is that exit relays may be able to guess whether
31250 the client is running Windows, thus helping partition the anonymity
31251 set. Down the road we should stop sending reasons to exit relays,
31252 or otherwise prevent future versions of this bug.
31255 - While setting up a hidden service, some valid introduction circuits
31256 were overlooked and abandoned. This might be the reason for
31257 the long delay in making a hidden service available. Bugfix on
31261 - Update to the "June 9 2008" ip-to-country file.
31262 - Run 'make test' as part of 'make dist', so we stop releasing so
31263 many development snapshots that fail their unit tests.
31266 - When we're checking if we have enough dir info for each relay
31267 to begin establishing circuits, make sure that we actually have
31268 the descriptor listed in the consensus, not just any descriptor.
31270 - Bridge relays no longer print "xx=0" in their extrainfo document
31271 for every single country code in the geoip db. Bugfix on
31273 - Only warn when we fail to load the geoip file if we were planning to
31274 include geoip stats in our extrainfo document. Bugfix on 0.2.0.27-rc.
31275 - If we change our MaxAdvertisedBandwidth and then reload torrc,
31276 Tor won't realize it should publish a new relay descriptor. Fixes
31277 bug 688, reported by mfr. Bugfix on 0.1.2.x.
31278 - When we haven't had any application requests lately, don't bother
31279 logging that we have expired a bunch of descriptors. Bugfix
31281 - Make relay cells written on a connection count as non-padding when
31282 tracking how long a connection has been in use. Bugfix on
31283 0.2.0.1-alpha. Spotted by lodger.
31284 - Fix unit tests in 0.2.0.27-rc.
31285 - Fix compile on Windows.
31288 Changes in version 0.2.0.27-rc - 2008-06-03
31289 Tor 0.2.0.27-rc adds a few features we left out of the earlier
31290 release candidates. In particular, we now include an IP-to-country
31291 GeoIP database, so controllers can easily look up what country a
31292 given relay is in, and so bridge relays can give us some sanitized
31293 summaries about which countries are making use of bridges. (See proposal
31294 126-geoip-fetching.txt for details.)
31297 - Include an IP-to-country GeoIP file in the tarball, so bridge
31298 relays can report sanitized summaries of the usage they're seeing.
31301 - Add a "PURPOSE=" argument to "STREAM NEW" events, as suggested by
31302 Robert Hogan. Fixes the first part of bug 681.
31303 - Make bridge authorities never serve extrainfo docs.
31304 - Add support to detect Libevent versions in the 1.4.x series
31306 - Fix build on gcc 4.3 with --enable-gcc-warnings set.
31307 - Include a new contrib/tor-exit-notice.html file that exit relay
31308 operators can put on their website to help reduce abuse queries.
31311 - When tunneling an encrypted directory connection, and its first
31312 circuit fails, do not leave it unattached and ask the controller
31313 to deal. Fixes the second part of bug 681.
31314 - Make bridge authorities correctly expire old extrainfo documents
31318 Changes in version 0.2.0.26-rc - 2008-05-13
31319 Tor 0.2.0.26-rc fixes a major security vulnerability caused by a bug
31320 in Debian's OpenSSL packages. All users running any 0.2.0.x version
31321 should upgrade, whether they're running Debian or not.
31323 o Major security fixes:
31324 - Use new V3 directory authority keys on the tor26, gabelmoo, and
31325 moria1 V3 directory authorities. The old keys were generated with
31326 a vulnerable version of Debian's OpenSSL package, and must be
31327 considered compromised. Other authorities' keys were not generated
31328 with an affected version of OpenSSL.
31331 - List authority signatures as "unrecognized" based on DirServer
31332 lines, not on cert cache. Bugfix on 0.2.0.x.
31335 - Add a new V3AuthUseLegacyKey option to make it easier for
31336 authorities to change their identity keys if they have to.
31339 Changes in version 0.2.0.25-rc - 2008-04-23
31340 Tor 0.2.0.25-rc makes Tor work again on OS X and certain BSDs.
31343 - Remember to initialize threading before initializing logging.
31344 Otherwise, many BSD-family implementations will crash hard on
31345 startup. Fixes bug 671. Bugfix on 0.2.0.24-rc.
31348 - Authorities correctly free policies on bad servers on
31349 exit. Fixes bug 672. Bugfix on 0.2.0.x.
31352 Changes in version 0.2.0.24-rc - 2008-04-22
31353 Tor 0.2.0.24-rc adds dizum (run by Alex de Joode) as the new sixth
31354 v3 directory authority, makes relays with dynamic IP addresses and no
31355 DirPort notice more quickly when their IP address changes, fixes a few
31356 rare crashes and memory leaks, and fixes a few other miscellaneous bugs.
31358 o New directory authorities:
31359 - Take lefkada out of the list of v3 directory authorities, since
31360 it has been down for months.
31361 - Set up dizum (run by Alex de Joode) as the new sixth v3 directory
31365 - Detect address changes more quickly on non-directory mirror
31366 relays. Bugfix on 0.2.0.18-alpha; fixes bug 652.
31368 o Minor features (security):
31369 - Reject requests for reverse-dns lookup of names that are in
31370 a private address space. Patch from lodger.
31371 - Non-exit relays no longer allow DNS requests. Fixes bug 619. Patch
31374 o Minor bugfixes (crashes):
31375 - Avoid a rare assert that can trigger when Tor doesn't have much
31376 directory information yet and it tries to fetch a v2 hidden
31377 service descriptor. Fixes bug 651, reported by nwf.
31378 - Initialize log mutex before initializing dmalloc. Otherwise,
31379 running with dmalloc would crash. Bugfix on 0.2.0.x-alpha.
31380 - Use recursive pthread mutexes in order to avoid deadlock when
31381 logging debug-level messages to a controller. Bug spotted by nwf,
31382 bugfix on 0.2.0.16-alpha.
31384 o Minor bugfixes (resource management):
31385 - Keep address policies from leaking memory: start their refcount
31386 at 1, not 2. Bugfix on 0.2.0.16-alpha.
31387 - Free authority certificates on exit, so they don't look like memory
31388 leaks. Bugfix on 0.2.0.19-alpha.
31389 - Free static hashtables for policy maps and for TLS connections on
31390 shutdown, so they don't look like memory leaks. Bugfix on 0.2.0.x.
31391 - Avoid allocating extra space when computing consensuses on 64-bit
31392 platforms. Bug spotted by aakova.
31394 o Minor bugfixes (misc):
31395 - Do not read the configuration file when we've only been told to
31396 generate a password hash. Fixes bug 643. Bugfix on 0.0.9pre5. Fix
31397 based on patch from Sebastian Hahn.
31398 - Exit relays that are used as a client can now reach themselves
31399 using the .exit notation, rather than just launching an infinite
31400 pile of circuits. Fixes bug 641. Reported by Sebastian Hahn.
31401 - When attempting to open a logfile fails, tell us why.
31402 - Fix a dumb bug that was preventing us from knowing that we should
31403 preemptively build circuits to handle expected directory requests.
31404 Fixes bug 660. Bugfix on 0.1.2.x.
31405 - Warn less verbosely about clock skew from netinfo cells from
31406 untrusted sources. Fixes bug 663.
31407 - Make controller stream events for DNS requests more consistent,
31408 by adding "new stream" events for DNS requests, and removing
31409 spurious "stream closed" events" for cached reverse resolves.
31410 Patch from mwenge. Fixes bug 646.
31411 - Correctly notify one-hop connections when a circuit build has
31412 failed. Possible fix for bug 669. Found by lodger.
31415 Changes in version 0.2.0.23-rc - 2008-03-24
31416 Tor 0.2.0.23-rc is the fourth release candidate for the 0.2.0 series. It
31417 makes bootstrapping faster if the first directory mirror you contact
31418 is down. The bundles also include the new Vidalia 0.1.2 release.
31421 - When a tunneled directory request is made to a directory server
31422 that's down, notice after 30 seconds rather than 120 seconds. Also,
31423 fail any begindir streams that are pending on it, so they can
31424 retry elsewhere. This was causing multi-minute delays on bootstrap.
31427 Changes in version 0.2.0.22-rc - 2008-03-18
31428 Tor 0.2.0.22-rc is the third release candidate for the 0.2.0 series. It
31429 enables encrypted directory connections by default for non-relays, fixes
31430 some broken TLS behavior we added in 0.2.0.20-rc, and resolves many
31431 other bugs. The bundles also include Vidalia 0.1.1 and Torbutton 1.1.17.
31434 - Enable encrypted directory connections by default for non-relays,
31435 so censor tools that block Tor directory connections based on their
31436 plaintext patterns will no longer work. This means Tor works in
31437 certain censored countries by default again.
31440 - Make sure servers always request certificates from clients during
31441 TLS renegotiation. Reported by lodger; bugfix on 0.2.0.20-rc.
31442 - Do not enter a CPU-eating loop when a connection is closed in
31443 the middle of client-side TLS renegotiation. Fixes bug 622. Bug
31444 diagnosed by lodger; bugfix on 0.2.0.20-rc.
31445 - Fix assertion failure that could occur when a blocked circuit
31446 became unblocked, and it had pending client DNS requests. Bugfix
31447 on 0.2.0.1-alpha. Fixes bug 632.
31449 o Minor bugfixes (on 0.1.2.x):
31450 - Generate "STATUS_SERVER" events rather than misspelled
31451 "STATUS_SEVER" events. Caught by mwenge.
31452 - When counting the number of bytes written on a TLS connection,
31453 look at the BIO actually used for writing to the network, not
31454 at the BIO used (sometimes) to buffer data for the network.
31455 Looking at different BIOs could result in write counts on the
31456 order of ULONG_MAX. Fixes bug 614.
31457 - On Windows, correctly detect errors when listing the contents of
31458 a directory. Fix from lodger.
31460 o Minor bugfixes (on 0.2.0.x):
31461 - Downgrade "sslv3 alert handshake failure" message to INFO.
31462 - If we set RelayBandwidthRate and RelayBandwidthBurst very high but
31463 left BandwidthRate and BandwidthBurst at the default, we would be
31464 silently limited by those defaults. Now raise them to match the
31465 RelayBandwidth* values.
31466 - Fix the SVK version detection logic to work correctly on a branch.
31467 - Make --enable-openbsd-malloc work correctly on Linux with alpha
31468 CPUs. Fixes bug 625.
31469 - Logging functions now check that the passed severity is sane.
31470 - Use proper log levels in the testsuite call of
31471 get_interface_address6().
31472 - When using a nonstandard malloc, do not use the platform values for
31473 HAVE_MALLOC_GOOD_SIZE or HAVE_MALLOC_USABLE_SIZE.
31474 - Make the openbsd malloc code use 8k pages on alpha CPUs and
31476 - Detect mismatched page sizes when using --enable-openbsd-malloc.
31477 - Avoid double-marked-for-close warning when certain kinds of invalid
31478 .in-addr.arpa addresses are passed to the DNSPort. Part of a fix
31479 for bug 617. Bugfix on 0.2.0.1-alpha.
31480 - Make sure that the "NULL-means-reject *:*" convention is followed by
31481 all the policy manipulation functions, avoiding some possible crash
31482 bugs. Bug found by lodger. Bugfix on 0.2.0.16-alpha.
31483 - Fix the implementation of ClientDNSRejectInternalAddresses so that it
31484 actually works, and doesn't warn about every single reverse lookup.
31485 Fixes the other part of bug 617. Bugfix on 0.2.0.1-alpha.
31488 - Only log guard node status when guard node status has changed.
31489 - Downgrade the 3 most common "INFO" messages to "DEBUG". This will
31490 make "INFO" 75% less verbose.
31493 Changes in version 0.2.0.21-rc - 2008-03-02
31494 Tor 0.2.0.21-rc is the second release candidate for the 0.2.0 series. It
31495 makes Tor work well with Vidalia again, fixes a rare assert bug,
31496 and fixes a pair of more minor bugs. The bundles also include Vidalia
31497 0.1.0 and Torbutton 1.1.16.
31500 - The control port should declare that it requires password auth
31501 when HashedControlSessionPassword is set too. Patch from Matt Edman;
31502 bugfix on 0.2.0.20-rc. Fixes bug 615.
31503 - Downgrade assert in connection_buckets_decrement() to a log message.
31504 This may help us solve bug 614, and in any case will make its
31505 symptoms less severe. Bugfix on 0.2.0.20-rc. Reported by fredzupy.
31506 - We were sometimes miscounting the number of bytes read from the
31507 network, causing our rate limiting to not be followed exactly.
31508 Bugfix on 0.2.0.16-alpha. Reported by lodger.
31511 - Fix compilation with OpenSSL 0.9.8 and 0.9.8a. All other supported
31512 OpenSSL versions should have been working fine. Diagnosis and patch
31513 from lodger, Karsten Loesing, and Sebastian Hahn. Fixes bug 616.
31514 Bugfix on 0.2.0.20-rc.
31517 Changes in version 0.2.0.20-rc - 2008-02-24
31518 Tor 0.2.0.20-rc is the first release candidate for the 0.2.0 series. It
31519 makes more progress towards normalizing Tor's TLS handshake, makes
31520 hidden services work better again, helps relays bootstrap if they don't
31521 know their IP address, adds optional support for linking in openbsd's
31522 allocator or tcmalloc, allows really fast relays to scale past 15000
31523 sockets, and fixes a bunch of minor bugs reported by Veracode.
31526 - Enable the revised TLS handshake based on the one designed by
31527 Steven Murdoch in proposal 124, as revised in proposal 130. It
31528 includes version negotiation for OR connections as described in
31529 proposal 105. The new handshake is meant to be harder for censors
31530 to fingerprint, and it adds the ability to detect certain kinds of
31531 man-in-the-middle traffic analysis attacks. The version negotiation
31532 feature will allow us to improve Tor's link protocol more safely
31534 - Choose which bridge to use proportional to its advertised bandwidth,
31535 rather than uniformly at random. This should speed up Tor for
31536 bridge users. Also do this for people who set StrictEntryNodes.
31537 - When a TrackHostExits-chosen exit fails too many times in a row,
31538 stop using it. Bugfix on 0.1.2.x; fixes bug 437.
31541 - Resolved problems with (re-)fetching hidden service descriptors.
31542 Patch from Karsten Loesing; fixes problems with 0.2.0.18-alpha
31543 and 0.2.0.19-alpha.
31544 - If we only ever used Tor for hidden service lookups or posts, we
31545 would stop building circuits and start refusing connections after
31546 24 hours, since we falsely believed that Tor was dormant. Reported
31547 by nwf; bugfix on 0.1.2.x.
31548 - Servers that don't know their own IP address should go to the
31549 authorities for their first directory fetch, even if their DirPort
31550 is off or if they don't know they're reachable yet. This will help
31551 them bootstrap better. Bugfix on 0.2.0.18-alpha; fixes bug 609.
31552 - When counting the number of open sockets, count not only the number
31553 of sockets we have received from the socket() call, but also
31554 the number we've gotten from accept() and socketpair(). This bug
31555 made us fail to count all sockets that we were using for incoming
31556 connections. Bugfix on 0.2.0.x.
31557 - Fix code used to find strings within buffers, when those strings
31558 are not in the first chunk of the buffer. Bugfix on 0.2.0.x.
31559 - Fix potential segfault when parsing HTTP headers. Bugfix on 0.2.0.x.
31560 - Add a new __HashedControlSessionPassword option for controllers
31561 to use for one-off session password hashes that shouldn't get
31562 saved to disk by SAVECONF --- Vidalia users were accumulating a
31563 pile of HashedControlPassword lines in their torrc files, one for
31564 each time they had restarted Tor and then clicked Save. Make Tor
31565 automatically convert "HashedControlPassword" to this new option but
31566 only when it's given on the command line. Partial fix for bug 586.
31568 o Minor features (performance):
31569 - Tune parameters for cell pool allocation to minimize amount of
31571 - Add OpenBSD malloc code from phk as an optional malloc
31572 replacement on Linux: some glibc libraries do very poorly
31573 with Tor's memory allocation patterns. Pass
31574 --enable-openbsd-malloc to get the replacement malloc code.
31575 - Add a --with-tcmalloc option to the configure script to link
31576 against tcmalloc (if present). Does not yet search for
31577 non-system include paths.
31578 - Stop imposing an arbitrary maximum on the number of file descriptors
31579 used for busy servers. Bug reported by Olaf Selke; patch from
31582 o Minor features (other):
31583 - When SafeLogging is disabled, log addresses along with all TLS
31585 - When building with --enable-gcc-warnings, check for whether Apple's
31586 warning "-Wshorten-64-to-32" is available.
31587 - Add a --passphrase-fd argument to the tor-gencert command for
31590 o Minor bugfixes (memory leaks and code problems):
31591 - We were leaking a file descriptor if Tor started with a zero-length
31592 cached-descriptors file. Patch by freddy77; bugfix on 0.1.2.
31593 - Detect size overflow in zlib code. Reported by Justin Ferguson and
31595 - We were comparing the raw BridgePassword entry with a base64'ed
31596 version of it, when handling a "/tor/networkstatus-bridges"
31597 directory request. Now compare correctly. Noticed by Veracode.
31598 - Recover from bad tracked-since value in MTBF-history file.
31599 Should fix bug 537.
31600 - Alter the code that tries to recover from unhandled write
31601 errors, to not try to flush onto a socket that's given us
31602 unhandled errors. Bugfix on 0.1.2.x.
31603 - Make Unix controlsockets work correctly on OpenBSD. Patch from
31604 tup. Bugfix on 0.2.0.3-alpha.
31606 o Minor bugfixes (other):
31607 - If we have an extra-info document for our server, always make
31608 it available on the control port, even if we haven't gotten
31609 a copy of it from an authority yet. Patch from mwenge.
31610 - Log the correct memory chunk sizes for empty RAM chunks in mempool.c.
31611 - Directory mirrors no longer include a guess at the client's IP
31612 address if the connection appears to be coming from the same /24
31613 network; it was producing too many wrong guesses.
31614 - Make the new hidden service code respect the SafeLogging setting.
31615 Bugfix on 0.2.0.x. Patch from Karsten.
31616 - When starting as an authority, do not overwrite all certificates
31617 cached from other authorities. Bugfix on 0.2.0.x. Fixes bug 606.
31618 - If we're trying to flush the last bytes on a connection (for
31619 example, when answering a directory request), reset the
31620 time-to-give-up timeout every time we manage to write something
31621 on the socket. Bugfix on 0.1.2.x.
31622 - Change the behavior of "getinfo status/good-server-descriptor"
31623 so it doesn't return failure when any authority disappears.
31624 - Even though the man page said that "TrackHostExits ." should
31625 work, nobody had ever implemented it. Bugfix on 0.1.0.x.
31626 - Report TLS "zero return" case as a "clean close" and "IO error"
31627 as a "close". Stop calling closes "unexpected closes": existing
31628 Tors don't use SSL_close(), so having a connection close without
31629 the TLS shutdown handshake is hardly unexpected.
31630 - Send NAMESERVER_STATUS messages for a single failed nameserver
31633 o Code simplifications and refactoring:
31634 - Remove the tor_strpartition function: its logic was confused,
31635 and it was only used for one thing that could be implemented far
31639 Changes in version 0.2.0.19-alpha - 2008-02-09
31640 Tor 0.2.0.19-alpha makes more progress towards normalizing Tor's TLS
31641 handshake, makes path selection for relays more secure and IP address
31642 guessing more robust, and generally fixes a lot of bugs in preparation
31643 for calling the 0.2.0 branch stable.
31646 - Do not include recognizeable strings in the commonname part of
31647 Tor's x509 certificates.
31650 - If we're a relay, avoid picking ourselves as an introduction point,
31651 a rendezvous point, or as the final hop for internal circuits. Bug
31652 reported by taranis and lodger. Bugfix on 0.1.2.x.
31653 - Patch from "Andrew S. Lists" to catch when we contact a directory
31654 mirror at IP address X and he says we look like we're coming from
31655 IP address X. Bugfix on 0.1.2.x.
31657 o Minor features (security):
31658 - Be more paranoid about overwriting sensitive memory on free(),
31659 as a defensive programming tactic to ensure forward secrecy.
31661 o Minor features (directory authority):
31662 - Actually validate the options passed to AuthDirReject,
31663 AuthDirInvalid, AuthDirBadDir, and AuthDirBadExit.
31664 - Reject router descriptors with out-of-range bandwidthcapacity or
31665 bandwidthburst values.
31667 o Minor features (controller):
31668 - Reject controller commands over 1MB in length. This keeps rogue
31669 processes from running us out of memory.
31671 o Minor features (misc):
31672 - Give more descriptive well-formedness errors for out-of-range
31673 hidden service descriptor/protocol versions.
31674 - Make memory debugging information describe more about history
31675 of cell allocation, so we can help reduce our memory use.
31677 o Deprecated features (controller):
31678 - The status/version/num-versioning and status/version/num-concurring
31679 GETINFO options are no longer useful in the v3 directory protocol:
31680 treat them as deprecated, and warn when they're used.
31683 - When our consensus networkstatus has been expired for a while, stop
31684 being willing to build circuits using it. Fixes bug 401. Bugfix
31686 - Directory caches now fetch certificates from all authorities
31687 listed in a networkstatus consensus, even when they do not
31688 recognize them. Fixes bug 571. Bugfix on 0.2.0.x.
31689 - When connecting to a bridge without specifying its key, insert
31690 the connection into the identity-to-connection map as soon as
31691 a key is learned. Fixes bug 574. Bugfix on 0.2.0.x.
31692 - Detect versions of OS X where malloc_good_size() is present in the
31693 library but never actually declared. Resolves bug 587. Bugfix
31695 - Stop incorrectly truncating zlib responses to directory authority
31696 signature download requests. Fixes bug 593. Bugfix on 0.2.0.x.
31697 - Stop recommending that every server operator send mail to tor-ops.
31698 Resolves bug 597. Bugfix on 0.1.2.x.
31699 - Don't trigger an assert if we start a directory authority with a
31700 private IP address (like 127.0.0.1).
31701 - Avoid possible failures when generating a directory with routers
31702 with over-long versions strings, or too many flags set. Bugfix
31704 - If an attempt to launch a DNS resolve request over the control
31705 port fails because we have overrun the limit on the number of
31706 connections, tell the controller that the request has failed.
31707 - Avoid using too little bandwidth when our clock skips a few
31708 seconds. Bugfix on 0.1.2.x.
31709 - Fix shell error when warning about missing packages in configure
31710 script, on Fedora or Red Hat machines. Bugfix on 0.2.0.x.
31711 - Do not become confused when receiving a spurious VERSIONS-like
31712 cell from a confused v1 client. Bugfix on 0.2.0.x.
31713 - Re-fetch v2 (as well as v0) rendezvous descriptors when all
31714 introduction points for a hidden service have failed. Patch from
31715 Karsten Loesing. Bugfix on 0.2.0.x.
31717 o Code simplifications and refactoring:
31718 - Remove some needless generality from cpuworker code, for improved
31720 - Stop overloading the circuit_t.onionskin field for both "onionskin
31721 from a CREATE cell that we are waiting for a cpuworker to be
31722 assigned" and "onionskin from an EXTEND cell that we are going to
31723 send to an OR as soon as we are connected". Might help with bug 600.
31724 - Add an in-place version of aes_crypt() so that we can avoid doing a
31725 needless memcpy() call on each cell payload.
31728 Changes in version 0.2.0.18-alpha - 2008-01-25
31729 Tor 0.2.0.18-alpha adds a sixth v3 directory authority run by CCC,
31730 fixes a big memory leak in 0.2.0.17-alpha, and adds new config options
31731 that can warn or reject connections to ports generally associated with
31732 vulnerable-plaintext protocols.
31734 o New directory authorities:
31735 - Set up dannenberg (run by CCC) as the sixth v3 directory
31739 - Fix a major memory leak when attempting to use the v2 TLS
31740 handshake code. Bugfix on 0.2.0.x; fixes bug 589.
31741 - We accidentally enabled the under-development v2 TLS handshake
31742 code, which was causing log entries like "TLS error while
31743 renegotiating handshake". Disable it again. Resolves bug 590.
31744 - We were computing the wrong Content-Length: header for directory
31745 responses that need to be compressed on the fly, causing clients
31746 asking for those items to always fail. Bugfix on 0.2.0.x; partially
31750 - Avoid going directly to the directory authorities even if you're a
31751 relay, if you haven't found yourself reachable yet or if you've
31752 decided not to advertise your dirport yet. Addresses bug 556.
31753 - If we've gone 12 hours since our last bandwidth check, and we
31754 estimate we have less than 50KB bandwidth capacity but we could
31755 handle more, do another bandwidth test.
31756 - New config options WarnPlaintextPorts and RejectPlaintextPorts so
31757 Tor can warn and/or refuse connections to ports commonly used with
31758 vulnerable-plaintext protocols. Currently we warn on ports 23,
31759 109, 110, and 143, but we don't reject any.
31762 - When we setconf ClientOnly to 1, close any current OR and Dir
31763 listeners. Reported by mwenge.
31764 - When we get a consensus that's been signed by more people than
31765 we expect, don't log about it; it's not a big deal. Reported
31769 - Don't answer "/tor/networkstatus-bridges" directory requests if
31770 the request isn't encrypted.
31771 - Make "ClientOnly 1" config option disable directory ports too.
31772 - Patches from Karsten Loesing to make v2 hidden services more
31773 robust: work even when there aren't enough HSDir relays available;
31774 retry when a v2 rend desc fetch fails; but don't retry if we
31775 already have a usable v0 rend desc.
31778 Changes in version 0.2.0.17-alpha - 2008-01-17
31779 Tor 0.2.0.17-alpha makes the tarball build cleanly again (whoops).
31782 - Make the tor-gencert man page get included correctly in the tarball.
31785 Changes in version 0.2.0.16-alpha - 2008-01-17
31786 Tor 0.2.0.16-alpha adds a fifth v3 directory authority run by Karsten
31787 Loesing, and generally cleans up a lot of features and minor bugs.
31789 o New directory authorities:
31790 - Set up gabelmoo (run by Karsten Loesing) as the fifth v3 directory
31793 o Major performance improvements:
31794 - Switch our old ring buffer implementation for one more like that
31795 used by free Unix kernels. The wasted space in a buffer with 1mb
31796 of data will now be more like 8k than 1mb. The new implementation
31797 also avoids realloc();realloc(); patterns that can contribute to
31798 memory fragmentation.
31801 - Configuration files now accept C-style strings as values. This
31802 helps encode characters not allowed in the current configuration
31803 file format, such as newline or #. Addresses bug 557.
31804 - Although we fixed bug 539 (where servers would send HTTP status 503
31805 responses _and_ send a body too), there are still servers out
31806 there that haven't upgraded. Therefore, make clients parse such
31807 bodies when they receive them.
31808 - When we're not serving v2 directory information, there is no reason
31809 to actually keep any around. Remove the obsolete files and directory
31810 on startup if they are very old and we aren't going to serve them.
31812 o Minor performance improvements:
31813 - Reference-count and share copies of address policy entries; only 5%
31814 of them were actually distinct.
31815 - Never walk through the list of logs if we know that no log is
31816 interested in a given message.
31819 - When an authority has not signed a consensus, do not try to
31820 download a nonexistent "certificate with key 00000000". Bugfix
31821 on 0.2.0.x. Fixes bug 569.
31822 - Fix a rare assert error when we're closing one of our threads:
31823 use a mutex to protect the list of logs, so we never write to the
31824 list as it's being freed. Bugfix on 0.1.2.x. Fixes the very rare
31825 bug 575, which is kind of the revenge of bug 222.
31826 - Patch from Karsten Loesing to complain less at both the client
31827 and the relay when a relay used to have the HSDir flag but doesn't
31828 anymore, and we try to upload a hidden service descriptor.
31829 - Stop leaking one cert per TLS context. Fixes bug 582. Bugfix on
31831 - Do not try to download missing certificates until we have tried
31832 to check our fallback consensus. Fixes bug 583.
31833 - Make bridges round reported GeoIP stats info up to the nearest
31834 estimate, not down. Now we can distinguish between "0 people from
31835 this country" and "1 person from this country".
31836 - Avoid a spurious free on base64 failure. Bugfix on 0.1.2.
31837 - Avoid possible segfault if key generation fails in
31838 crypto_pk_hybrid_encrypt. Bugfix on 0.2.0.
31839 - Avoid segfault in the case where a badly behaved v2 versioning
31840 directory sends a signed networkstatus with missing client-versions.
31842 - Avoid segfaults on certain complex invocations of
31843 router_get_by_hexdigest(). Bugfix on 0.1.2.
31844 - Correct bad index on array access in parse_http_time(). Bugfix
31846 - Fix possible bug in vote generation when server versions are present
31847 but client versions are not.
31848 - Fix rare bug on REDIRECTSTREAM control command when called with no
31849 port set: it could erroneously report an error when none had
31851 - Avoid bogus crash-prone, leak-prone tor_realloc when we're
31852 compressing large objects and find ourselves with more than 4k
31853 left over. Bugfix on 0.2.0.
31854 - Fix a small memory leak when setting up a hidden service.
31855 - Fix a few memory leaks that could in theory happen under bizarre
31857 - Fix an assert if we post a general-purpose descriptor via the
31858 control port but that descriptor isn't mentioned in our current
31859 network consensus. Bug reported by Jon McLachlan; bugfix on
31862 o Minor features (controller):
31863 - Get NS events working again. Patch from tup.
31864 - The GETCONF command now escapes and quotes configuration values
31865 that don't otherwise fit into the torrc file.
31866 - The SETCONF command now handles quoted values correctly.
31868 o Minor features (directory authorities):
31869 - New configuration options to override default maximum number of
31870 servers allowed on a single IP address. This is important for
31871 running a test network on a single host.
31872 - Actually implement the -s option to tor-gencert.
31873 - Add a manual page for tor-gencert.
31875 o Minor features (bridges):
31876 - Bridge authorities no longer serve bridge descriptors over
31877 unencrypted connections.
31879 o Minor features (other):
31880 - Add hidden services and DNSPorts to the list of things that make
31881 Tor accept that it has running ports. Change starting Tor with no
31882 ports from a fatal error to a warning; we might change it back if
31883 this turns out to confuse anybody. Fixes bug 579.
31886 Changes in version 0.1.2.19 - 2008-01-17
31887 Tor 0.1.2.19 fixes a huge memory leak on exit relays, makes the default
31888 exit policy a little bit more conservative so it's safer to run an
31889 exit relay on a home system, and fixes a variety of smaller issues.
31892 - Exit policies now reject connections that are addressed to a
31893 relay's public (external) IP address too, unless
31894 ExitPolicyRejectPrivate is turned off. We do this because too
31895 many relays are running nearby to services that trust them based
31896 on network address.
31899 - When the clock jumps forward a lot, do not allow the bandwidth
31900 buckets to become negative. Fixes bug 544.
31901 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
31902 on every successful resolve. Reported by Mike Perry.
31903 - Purge old entries from the "rephist" database and the hidden
31904 service descriptor database even when DirPort is zero.
31905 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
31906 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
31907 crashing or mis-answering these requests.
31908 - When we decide to send a 503 response to a request for servers, do
31909 not then also send the server descriptors: this defeats the whole
31910 purpose. Fixes bug 539.
31913 - Changing the ExitPolicyRejectPrivate setting should cause us to
31914 rebuild our server descriptor.
31915 - Fix handling of hex nicknames when answering controller requests for
31916 networkstatus by name, or when deciding whether to warn about
31917 unknown routers in a config option. (Patch from mwenge.)
31918 - Fix a couple of hard-to-trigger autoconf problems that could result
31919 in really weird results on platforms whose sys/types.h files define
31920 nonstandard integer types.
31921 - Don't try to create the datadir when running --verify-config or
31922 --hash-password. Resolves bug 540.
31923 - If we were having problems getting a particular descriptor from the
31924 directory caches, and then we learned about a new descriptor for
31925 that router, we weren't resetting our failure count. Reported
31927 - Although we fixed bug 539 (where servers would send HTTP status 503
31928 responses _and_ send a body too), there are still servers out there
31929 that haven't upgraded. Therefore, make clients parse such bodies
31930 when they receive them.
31931 - Run correctly on systems where rlim_t is larger than unsigned long.
31932 This includes some 64-bit systems.
31933 - Run correctly on platforms (like some versions of OS X 10.5) where
31934 the real limit for number of open files is OPEN_FILES, not rlim_max
31935 from getrlimit(RLIMIT_NOFILES).
31936 - Avoid a spurious free on base64 failure.
31937 - Avoid segfaults on certain complex invocations of
31938 router_get_by_hexdigest().
31939 - Fix rare bug on REDIRECTSTREAM control command when called with no
31940 port set: it could erroneously report an error when none had
31944 Changes in version 0.2.0.15-alpha - 2007-12-25
31945 Tor 0.2.0.14-alpha and 0.2.0.15-alpha fix a bunch of bugs with the
31946 features added in 0.2.0.13-alpha.
31949 - Fix several remotely triggerable asserts based on DirPort requests
31950 for a v2 or v3 networkstatus object before we were prepared. This
31951 was particularly bad for 0.2.0.13 and later bridge relays, who
31952 would never have a v2 networkstatus and would thus always crash
31953 when used. Bugfixes on 0.2.0.x.
31954 - Estimate the v3 networkstatus size more accurately, rather than
31955 estimating it at zero bytes and giving it artificially high priority
31956 compared to other directory requests. Bugfix on 0.2.0.x.
31959 - Fix configure.in logic for cross-compilation.
31960 - When we load a bridge descriptor from the cache, and it was
31961 previously unreachable, mark it as retriable so we won't just
31962 ignore it. Also, try fetching a new copy immediately. Bugfixes
31964 - The bridge GeoIP stats were counting other relays, for example
31965 self-reachability and authority-reachability tests.
31968 - Support compilation to target iPhone; patch from cjacker huang.
31969 To build for iPhone, pass the --enable-iphone option to configure.
31972 Changes in version 0.2.0.14-alpha - 2007-12-23
31974 - Fix a crash on startup if you install Tor 0.2.0.13-alpha fresh
31975 without a datadirectory from a previous Tor install. Reported
31977 - Fix a crash when we fetch a descriptor that turns out to be
31978 unexpected (it used to be in our networkstatus when we started
31979 fetching it, but it isn't in our current networkstatus), and we
31980 aren't using bridges. Bugfix on 0.2.0.x.
31981 - Fix a crash when accessing hidden services: it would work the first
31982 time you use a given introduction point for your service, but
31983 on subsequent requests we'd be using garbage memory. Fixed by
31984 Karsten Loesing. Bugfix on 0.2.0.13-alpha.
31985 - Fix a crash when we load a bridge descriptor from disk but we don't
31986 currently have a Bridge line for it in our torrc. Bugfix on
31990 - If bridge authorities set BridgePassword, they will serve a
31991 snapshot of known bridge routerstatuses from their DirPort to
31992 anybody who knows that password. Unset by default.
31995 - Make the unit tests build again.
31996 - Make "GETINFO/desc-annotations/id/<OR digest>" actually work.
31997 - Make PublishServerDescriptor default to 1, so the default doesn't
31998 have to change as we invent new directory protocol versions.
31999 - Fix test for rlim_t on OSX 10.3: sys/resource.h doesn't want to
32000 be included unless sys/time.h is already included. Fixes
32001 bug 553. Bugfix on 0.2.0.x.
32002 - If we receive a general-purpose descriptor and then receive an
32003 identical bridge-purpose descriptor soon after, don't discard
32004 the next one as a duplicate.
32007 - If BridgeRelay is set to 1, then the default for
32008 PublishServerDescriptor is now "bridge" rather than "v2,v3".
32009 - If the user sets RelayBandwidthRate but doesn't set
32010 RelayBandwidthBurst, then make them equal rather than erroring out.
32013 Changes in version 0.2.0.13-alpha - 2007-12-21
32014 Tor 0.2.0.13-alpha adds a fourth v3 directory authority run by Geoff
32015 Goodell, fixes many more bugs, and adds a lot of infrastructure for
32018 o New directory authorities:
32019 - Set up lefkada (run by Geoff Goodell) as the fourth v3 directory
32023 - Only update guard status (usable / not usable) once we have
32024 enough directory information. This was causing us to always pick
32025 two new guards on startup (bugfix on 0.2.0.9-alpha), and it was
32026 causing us to discard all our guards on startup if we hadn't been
32027 running for a few weeks (bugfix on 0.1.2.x). Fixes bug 448.
32028 - Purge old entries from the "rephist" database and the hidden
32029 service descriptor databases even when DirPort is zero. Bugfix
32031 - We were ignoring our RelayBandwidthRate for the first 30 seconds
32032 after opening a circuit -- even a relayed circuit. Bugfix on
32034 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
32035 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
32036 crashing or mis-answering these types of requests.
32037 - Relays were publishing their server descriptor to v1 and v2
32038 directory authorities, but they didn't try publishing to v3-only
32039 authorities. Fix this; and also stop publishing to v1 authorities.
32041 - When we were reading router descriptors from cache, we were ignoring
32042 the annotations -- so for example we were reading in bridge-purpose
32043 descriptors as general-purpose descriptors. Bugfix on 0.2.0.8-alpha.
32044 - When we decided to send a 503 response to a request for servers, we
32045 were then also sending the server descriptors: this defeats the
32046 whole purpose. Fixes bug 539; bugfix on 0.1.2.x.
32049 - Bridge relays now behave like clients with respect to time
32050 intervals for downloading new consensus documents -- otherwise they
32051 stand out. Bridge users now wait until the end of the interval,
32052 so their bridge relay will be sure to have a new consensus document.
32053 - Three new config options (AlternateDirAuthority,
32054 AlternateBridgeAuthority, and AlternateHSAuthority) that let the
32055 user selectively replace the default directory authorities by type,
32056 rather than the all-or-nothing replacement that DirServer offers.
32057 - Tor can now be configured to read a GeoIP file from disk in one
32058 of two formats. This can be used by controllers to map IP addresses
32059 to countries. Eventually, it may support exit-by-country.
32060 - When possible, bridge relays remember which countries users
32061 are coming from, and report aggregate information in their
32062 extra-info documents, so that the bridge authorities can learn
32063 where Tor is blocked.
32064 - Bridge directory authorities now do reachability testing on the
32065 bridges they know. They provide router status summaries to the
32066 controller via "getinfo ns/purpose/bridge", and also dump summaries
32067 to a file periodically.
32068 - Stop fetching directory info so aggressively if your DirPort is
32069 on but your ORPort is off; stop fetching v2 dir info entirely.
32070 You can override these choices with the new FetchDirInfoEarly
32074 - The fix in 0.2.0.12-alpha cleared the "hsdir" flag in v3 network
32075 consensus documents when there are too many relays at a single
32076 IP address. Now clear it in v2 network status documents too, and
32077 also clear it in routerinfo_t when the relay is no longer listed
32078 in the relevant networkstatus document.
32079 - Don't crash if we get an unexpected value for the
32080 PublishServerDescriptor config option. Reported by Matt Edman;
32081 bugfix on 0.2.0.9-alpha.
32082 - Our new v2 hidden service descriptor format allows descriptors
32083 that have no introduction points. But Tor crashed when we tried
32084 to build a descriptor with no intro points (and it would have
32085 crashed if we had tried to parse one). Bugfix on 0.2.0.x; patch
32086 by Karsten Loesing.
32087 - Fix building with dmalloc 5.5.2 with glibc.
32088 - Reject uploaded descriptors and extrainfo documents if they're
32089 huge. Otherwise we'll cache them all over the network and it'll
32090 clog everything up. Reported by Aljosha Judmayer.
32091 - Check for presence of s6_addr16 and s6_addr32 fields in in6_addr
32092 via autoconf. Should fix compile on solaris. Bugfix on 0.2.0.x.
32093 - When the DANGEROUS_VERSION controller status event told us we're
32094 running an obsolete version, it used the string "OLD" to describe
32095 it. Yet the "getinfo" interface used the string "OBSOLETE". Now use
32096 "OBSOLETE" in both cases. Bugfix on 0.1.2.x.
32097 - If we can't expand our list of entry guards (e.g. because we're
32098 using bridges or we have StrictEntryNodes set), don't mark relays
32099 down when they fail a directory request. Otherwise we're too quick
32100 to mark all our entry points down. Bugfix on 0.1.2.x.
32101 - Fix handling of hex nicknames when answering controller requests for
32102 networkstatus by name, or when deciding whether to warn about unknown
32103 routers in a config option. Bugfix on 0.1.2.x. (Patch from mwenge.)
32104 - Fix a couple of hard-to-trigger autoconf problems that could result
32105 in really weird results on platforms whose sys/types.h files define
32106 nonstandard integer types. Bugfix on 0.1.2.x.
32107 - Fix compilation with --disable-threads set. Bugfix on 0.2.0.x.
32108 - Don't crash on name lookup when we have no current consensus. Fixes
32109 bug 538; bugfix on 0.2.0.x.
32110 - Only Tors that want to mirror the v2 directory info should
32111 create the "cached-status" directory in their datadir. (All Tors
32112 used to create it.) Bugfix on 0.2.0.9-alpha.
32113 - Directory authorities should only automatically download Extra Info
32114 documents if they're v1, v2, or v3 authorities. Bugfix on 0.1.2.x.
32117 - On the USR1 signal, when dmalloc is in use, log the top 10 memory
32118 consumers. (We already do this on HUP.)
32119 - Authorities and caches fetch the v2 networkstatus documents
32120 less often, now that v3 is encouraged.
32121 - Add a new config option BridgeRelay that specifies you want to
32122 be a bridge relay. Right now the only difference is that it makes
32123 you answer begin_dir requests, and it makes you cache dir info,
32124 even if your DirPort isn't on.
32125 - Add "GETINFO/desc-annotations/id/<OR digest>" so controllers can
32126 ask about source, timestamp of arrival, purpose, etc. We need
32127 something like this to help Vidalia not do GeoIP lookups on bridge
32129 - Allow multiple HashedControlPassword config lines, to support
32130 multiple controller passwords.
32131 - Authorities now decide whether they're authoritative for a given
32132 router based on the router's purpose.
32133 - New config options AuthDirBadDir and AuthDirListBadDirs for
32134 authorities to mark certain relays as "bad directories" in the
32135 networkstatus documents. Also supports the "!baddir" directive in
32136 the approved-routers file.
32139 Changes in version 0.2.0.12-alpha - 2007-11-16
32140 This twelfth development snapshot fixes some more build problems as
32141 well as a few minor bugs.
32144 - Make it build on OpenBSD again. Patch from tup.
32145 - Substitute BINDIR and LOCALSTATEDIR in scripts. Fixes
32146 package-building for Red Hat, OS X, etc.
32148 o Minor bugfixes (on 0.1.2.x):
32149 - Changing the ExitPolicyRejectPrivate setting should cause us to
32150 rebuild our server descriptor.
32152 o Minor bugfixes (on 0.2.0.x):
32153 - When we're lacking a consensus, don't try to perform rendezvous
32154 operations. Reported by Karsten Loesing.
32155 - Fix a small memory leak whenever we decide against using a
32156 newly picked entry guard. Reported by Mike Perry.
32157 - When authorities detected more than two relays running on the same
32158 IP address, they were clearing all the status flags but forgetting
32159 to clear the "hsdir" flag. So clients were being told that a
32160 given relay was the right choice for a v2 hsdir lookup, yet they
32161 never had its descriptor because it was marked as 'not running'
32163 - If we're trying to fetch a bridge descriptor and there's no way
32164 the bridge authority could help us (for example, we don't know
32165 a digest, or there is no bridge authority), don't be so eager to
32166 fall back to asking the bridge authority.
32167 - If we're using bridges or have strictentrynodes set, and our
32168 chosen exit is in the same family as all our bridges/entry guards,
32169 then be flexible about families.
32172 - When we negotiate a v2 link-layer connection (not yet implemented),
32173 accept RELAY_EARLY cells and turn them into RELAY cells if we've
32174 negotiated a v1 connection for their next step. Initial code for
32178 Changes in version 0.2.0.11-alpha - 2007-11-12
32179 This eleventh development snapshot fixes some build problems with
32180 the previous snapshot. It also includes a more secure-by-default exit
32181 policy for relays, fixes an enormous memory leak for exit relays, and
32182 fixes another bug where servers were falling out of the directory list.
32185 - Exit policies now reject connections that are addressed to a
32186 relay's public (external) IP address too, unless
32187 ExitPolicyRejectPrivate is turned off. We do this because too
32188 many relays are running nearby to services that trust them based
32189 on network address. Bugfix on 0.1.2.x.
32192 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
32193 on every successful resolve. Reported by Mike Perry; bugfix
32195 - On authorities, never downgrade to old router descriptors simply
32196 because they're listed in the consensus. This created a catch-22
32197 where we wouldn't list a new descriptor because there was an
32198 old one in the consensus, and we couldn't get the new one in the
32199 consensus because we wouldn't list it. Possible fix for bug 548.
32200 Also, this might cause bug 543 to appear on authorities; if so,
32201 we'll need a band-aid for that. Bugfix on 0.2.0.9-alpha.
32203 o Packaging fixes on 0.2.0.10-alpha:
32204 - We were including instructions about what to do with the
32205 src/config/fallback-consensus file, but we weren't actually
32206 including it in the tarball. Disable all of that for now.
32209 - Allow people to say PreferTunnelledDirConns rather than
32210 PreferTunneledDirConns, for those alternate-spellers out there.
32213 - Don't reevaluate all the information from our consensus document
32214 just because we've downloaded a v2 networkstatus that we intend
32215 to cache. Fixes bug 545; bugfix on 0.2.0.x.
32218 Changes in version 0.2.0.10-alpha - 2007-11-10
32219 This tenth development snapshot adds a third v3 directory authority
32220 run by Mike Perry, adds most of Karsten Loesing's new hidden service
32221 descriptor format, fixes a bad crash bug and new bridge bugs introduced
32222 in 0.2.0.9-alpha, fixes many bugs with the v3 directory implementation,
32223 fixes some minor memory leaks in previous 0.2.0.x snapshots, and
32224 addresses many more minor issues.
32226 o New directory authorities:
32227 - Set up ides (run by Mike Perry) as the third v3 directory authority.
32230 - Allow tunnelled directory connections to ask for an encrypted
32231 "begin_dir" connection or an anonymized "uses a full Tor circuit"
32232 connection independently. Now we can make anonymized begin_dir
32233 connections for (e.g.) more secure hidden service posting and
32235 - More progress on proposal 114: code from Karsten Loesing to
32236 implement new hidden service descriptor format.
32237 - Raise the default BandwidthRate/BandwidthBurst to 5MB/10MB, to
32238 accommodate the growing number of servers that use the default
32239 and are reaching it.
32240 - Directory authorities use a new formula for selecting which nodes
32241 to advertise as Guards: they must be in the top 7/8 in terms of
32242 how long we have known about them, and above the median of those
32243 nodes in terms of weighted fractional uptime.
32244 - Make "not enough dir info yet" warnings describe *why* Tor feels
32245 it doesn't have enough directory info yet.
32248 - Stop servers from crashing if they set a Family option (or
32249 maybe in other situations too). Bugfix on 0.2.0.9-alpha; reported
32251 - Make bridge users work again -- the move to v3 directories in
32252 0.2.0.9-alpha had introduced a number of bugs that made bridges
32253 no longer work for clients.
32254 - When the clock jumps forward a lot, do not allow the bandwidth
32255 buckets to become negative. Bugfix on 0.1.2.x; fixes bug 544.
32257 o Major bugfixes (v3 dir, bugfixes on 0.2.0.9-alpha):
32258 - When the consensus lists a router descriptor that we previously were
32259 mirroring, but that we considered non-canonical, reload the
32260 descriptor as canonical. This fixes bug 543 where Tor servers
32261 would start complaining after a few days that they don't have
32262 enough directory information to build a circuit.
32263 - Consider replacing the current consensus when certificates arrive
32264 that make the pending consensus valid. Previously, we were only
32265 considering replacement when the new certs _didn't_ help.
32266 - Fix an assert error on startup if we didn't already have the
32267 consensus and certs cached in our datadirectory: we were caching
32268 the consensus in consensus_waiting_for_certs but then free'ing it
32270 - Avoid sending a request for "keys/fp" (for which we'll get a 400 Bad
32271 Request) if we need more v3 certs but we've already got pending
32272 requests for all of them.
32273 - Correctly back off from failing certificate downloads. Fixes
32275 - Authorities don't vote on the Running flag if they have been running
32276 for less than 30 minutes themselves. Fixes bug 547, where a newly
32277 started authority would vote that everyone was down.
32279 o New requirements:
32280 - Drop support for OpenSSL version 0.9.6. Just about nobody was using
32281 it, it had no AES, and it hasn't seen any security patches since
32285 - Clients now hold circuitless TLS connections open for 1.5 times
32286 MaxCircuitDirtiness (15 minutes), since it is likely that they'll
32287 rebuild a new circuit over them within that timeframe. Previously,
32288 they held them open only for KeepalivePeriod (5 minutes).
32289 - Use "If-Modified-Since" to avoid retrieving consensus
32290 networkstatuses that we already have.
32291 - When we have no consensus, check FallbackNetworkstatusFile (defaults
32292 to $PREFIX/share/tor/fallback-consensus) for a consensus. This way
32293 we start knowing some directory caches.
32294 - When we receive a consensus from the future, warn about skew.
32295 - Improve skew reporting: try to give the user a better log message
32296 about how skewed they are, and how much this matters.
32297 - When we have a certificate for an authority, believe that
32298 certificate's claims about the authority's IP address.
32299 - New --quiet command-line option to suppress the default console log.
32300 Good in combination with --hash-password.
32301 - Authorities send back an X-Descriptor-Not-New header in response to
32302 an accepted-but-discarded descriptor upload. Partially implements
32304 - Make the log message for "tls error. breaking." more useful.
32305 - Better log messages about certificate downloads, to attempt to
32306 track down the second incarnation of bug 546.
32308 o Minor features (bridges):
32309 - If bridge users set UpdateBridgesFromAuthority, but the digest
32310 they ask for is a 404 from the bridge authority, they now fall
32311 back to trying the bridge directly.
32312 - Bridges now use begin_dir to publish their server descriptor to
32313 the bridge authority, even when they haven't set TunnelDirConns.
32315 o Minor features (controller):
32316 - When reporting clock skew, and we know that the clock is _at least
32317 as skewed_ as some value, but we don't know the actual value,
32318 report the value as a "minimum skew."
32321 - Update linux-tor-prio.sh script to allow QoS based on the uid of
32322 the Tor process. Patch from Marco Bonetti with tweaks from Mike
32326 - Refuse to start if both ORPort and UseBridges are set. Bugfix
32327 on 0.2.0.x, suggested by Matt Edman.
32328 - Don't stop fetching descriptors when FetchUselessDescriptors is
32329 set, even if we stop asking for circuits. Bugfix on 0.1.2.x;
32330 reported by tup and ioerror.
32331 - Better log message on vote from unknown authority.
32332 - Don't log "Launching 0 request for 0 router" message.
32334 o Minor bugfixes (memory leaks):
32335 - Stop leaking memory every time we parse a v3 certificate. Bugfix
32337 - Stop leaking memory every time we load a v3 certificate. Bugfix
32338 on 0.2.0.1-alpha. Fixes bug 536.
32339 - Stop leaking a cached networkstatus on exit. Bugfix on
32341 - Stop leaking voter information every time we free a consensus.
32342 Bugfix on 0.2.0.3-alpha.
32343 - Stop leaking signed data every time we check a voter signature.
32344 Bugfix on 0.2.0.3-alpha.
32345 - Stop leaking a signature every time we fail to parse a consensus or
32346 a vote. Bugfix on 0.2.0.3-alpha.
32347 - Stop leaking v2_download_status_map on shutdown. Bugfix on
32349 - Stop leaking conn->nickname every time we make a connection to a
32350 Tor relay without knowing its expected identity digest (e.g. when
32351 using bridges). Bugfix on 0.2.0.3-alpha.
32353 - Minor bugfixes (portability):
32354 - Run correctly on platforms where rlim_t is larger than unsigned
32355 long, and/or where the real limit for number of open files is
32356 OPEN_FILES, not rlim_max from getrlimit(RLIMIT_NOFILES). In
32357 particular, these may be needed for OS X 10.5.
32360 Changes in version 0.1.2.18 - 2007-10-28
32361 Tor 0.1.2.18 fixes many problems including crash bugs, problems with
32362 hidden service introduction that were causing huge delays, and a big
32363 bug that was causing some servers to disappear from the network status
32364 lists for a few hours each day.
32366 o Major bugfixes (crashes):
32367 - If a connection is shut down abruptly because of something that
32368 happened inside connection_flushed_some(), do not call
32369 connection_finished_flushing(). Should fix bug 451:
32370 "connection_stop_writing: Assertion conn->write_event failed"
32371 Bugfix on 0.1.2.7-alpha.
32372 - Fix possible segfaults in functions called from
32373 rend_process_relay_cell().
32375 o Major bugfixes (hidden services):
32376 - Hidden services were choosing introduction points uniquely by
32377 hexdigest, but when constructing the hidden service descriptor
32378 they merely wrote the (potentially ambiguous) nickname.
32379 - Clients now use the v2 intro format for hidden service
32380 connections: they specify their chosen rendezvous point by identity
32381 digest rather than by (potentially ambiguous) nickname. These
32382 changes could speed up hidden service connections dramatically.
32384 o Major bugfixes (other):
32385 - Stop publishing a new server descriptor just because we get a
32386 HUP signal. This led (in a roundabout way) to some servers getting
32387 dropped from the networkstatus lists for a few hours each day.
32388 - When looking for a circuit to cannibalize, consider family as well
32389 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
32390 circuit cannibalization).
32391 - When a router wasn't listed in a new networkstatus, we were leaving
32392 the flags for that router alone -- meaning it remained Named,
32393 Running, etc -- even though absence from the networkstatus means
32394 that it shouldn't be considered to exist at all anymore. Now we
32395 clear all the flags for routers that fall out of the networkstatus
32396 consensus. Fixes bug 529.
32399 - Don't try to access (or alter) the state file when running
32400 --list-fingerprint or --verify-config or --hash-password. Resolves
32402 - When generating information telling us how to extend to a given
32403 router, do not try to include the nickname if it is
32404 absent. Resolves bug 467.
32405 - Fix a user-triggerable segfault in expand_filename(). (There isn't
32406 a way to trigger this remotely.)
32407 - When sending a status event to the controller telling it that an
32408 OR address is reachable, set the port correctly. (Previously we
32409 were reporting the dir port.)
32410 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
32411 command. Bugfix on 0.1.2.17.
32412 - When loading bandwidth history, do not believe any information in
32413 the future. Fixes bug 434.
32414 - When loading entry guard information, do not believe any information
32416 - When we have our clock set far in the future and generate an
32417 onion key, then re-set our clock to be correct, we should not stop
32418 the onion key from getting rotated.
32419 - On some platforms, accept() can return a broken address. Detect
32420 this more quietly, and deal accordingly. Fixes bug 483.
32421 - It's not actually an error to find a non-pending entry in the DNS
32422 cache when canceling a pending resolve. Don't log unless stuff
32423 is fishy. Resolves bug 463.
32424 - Don't reset trusted dir server list when we set a configuration
32425 option. Patch from Robert Hogan.
32426 - Don't try to create the datadir when running --verify-config or
32427 --hash-password. Resolves bug 540.
32430 Changes in version 0.2.0.9-alpha - 2007-10-24
32431 This ninth development snapshot switches clients to the new v3 directory
32432 system; allows servers to be listed in the network status even when they
32433 have the same nickname as a registered server; and fixes many other
32434 bugs including a big one that was causing some servers to disappear
32435 from the network status lists for a few hours each day.
32437 o Major features (directory system):
32438 - Clients now download v3 consensus networkstatus documents instead
32439 of v2 networkstatus documents. Clients and caches now base their
32440 opinions about routers on these consensus documents. Clients only
32441 download router descriptors listed in the consensus.
32442 - Authorities now list servers who have the same nickname as
32443 a different named server, but list them with a new flag,
32444 "Unnamed". Now we can list servers that happen to pick the same
32445 nickname as a server that registered two years ago and then
32446 disappeared. Partially implements proposal 122.
32447 - If the consensus lists a router as "Unnamed", the name is assigned
32448 to a different router: do not identify the router by that name.
32449 Partially implements proposal 122.
32450 - Authorities can now come to a consensus on which method to use to
32451 compute the consensus. This gives us forward compatibility.
32454 - Stop publishing a new server descriptor just because we HUP or
32455 when we find our DirPort to be reachable but won't actually publish
32456 it. New descriptors without any real changes are dropped by the
32457 authorities, and can screw up our "publish every 18 hours" schedule.
32459 - When a router wasn't listed in a new networkstatus, we were leaving
32460 the flags for that router alone -- meaning it remained Named,
32461 Running, etc -- even though absence from the networkstatus means
32462 that it shouldn't be considered to exist at all anymore. Now we
32463 clear all the flags for routers that fall out of the networkstatus
32464 consensus. Fixes bug 529; bugfix on 0.1.2.x.
32465 - Fix awful behavior in DownloadExtraInfo option where we'd fetch
32466 extrainfo documents and then discard them immediately for not
32467 matching the latest router. Bugfix on 0.2.0.1-alpha.
32469 o Minor features (v3 directory protocol):
32470 - Allow tor-gencert to generate a new certificate without replacing
32472 - Allow certificates to include an address.
32473 - When we change our directory-cache settings, reschedule all voting
32474 and download operations.
32475 - Reattempt certificate downloads immediately on failure, as long as
32476 we haven't failed a threshold number of times yet.
32477 - Delay retrying consensus downloads while we're downloading
32478 certificates to verify the one we just got. Also, count getting a
32479 consensus that we already have (or one that isn't valid) as a failure,
32480 and count failing to get the certificates after 20 minutes as a
32482 - Build circuits and download descriptors even if our consensus is a
32483 little expired. (This feature will go away once authorities are
32486 o Minor features (router descriptor cache):
32487 - If we find a cached-routers file that's been sitting around for more
32488 than 28 days unmodified, then most likely it's a leftover from
32489 when we upgraded to 0.2.0.8-alpha. Remove it. It has no good
32491 - When we (as a cache) download a descriptor because it was listed
32492 in a consensus, remember when the consensus was supposed to expire,
32493 and don't expire the descriptor until then.
32495 o Minor features (performance):
32496 - Call routerlist_remove_old_routers() much less often. This should
32497 speed startup, especially on directory caches.
32498 - Don't try to launch new descriptor downloads quite so often when we
32499 already have enough directory information to build circuits.
32500 - Base64 decoding was actually showing up on our profile when parsing
32501 the initial descriptor file; switch to an in-process all-at-once
32502 implementation that's about 3.5x times faster than calling out to
32505 o Minor features (compilation):
32506 - Detect non-ASCII platforms (if any still exist) and refuse to
32507 build there: some of our code assumes that 'A' is 65 and so on.
32509 o Minor bugfixes (v3 directory authorities, bugfixes on 0.2.0.x):
32510 - Make the "next period" votes into "current period" votes immediately
32511 after publishing the consensus; avoid a heisenbug that made them
32512 stick around indefinitely.
32513 - When we discard a vote as a duplicate, do not report this as
32515 - Treat missing v3 keys or certificates as an error when running as a
32516 v3 directory authority.
32517 - When we're configured to be a v3 authority, but we're only listed
32518 as a non-v3 authority in our DirServer line for ourself, correct
32520 - If an authority doesn't have a qualified hostname, just put
32521 its address in the vote. This fixes the problem where we referred to
32522 "moria on moria:9031."
32523 - Distinguish between detached signatures for the wrong period, and
32524 detached signatures for a divergent vote.
32525 - Fix a small memory leak when computing a consensus.
32526 - When there's no consensus, we were forming a vote every 30
32527 minutes, but writing the "valid-after" line in our vote based
32528 on our configured V3AuthVotingInterval: so unless the intervals
32529 matched up, we immediately rejected our own vote because it didn't
32530 start at the voting interval that caused us to construct a vote.
32532 o Minor bugfixes (v3 directory protocol, bugfixes on 0.2.0.x):
32533 - Delete unverified-consensus when the real consensus is set.
32534 - Consider retrying a consensus networkstatus fetch immediately
32535 after one fails: don't wait 60 seconds to notice.
32536 - When fetching a consensus as a cache, wait until a newer consensus
32537 should exist before trying to replace the current one.
32538 - Use a more forgiving schedule for retrying failed consensus
32539 downloads than for other types.
32541 o Minor bugfixes (other directory issues):
32542 - Correct the implementation of "download votes by digest." Bugfix on
32544 - Authorities no longer send back "400 you're unreachable please fix
32545 it" errors to Tor servers that aren't online all the time. We're
32546 supposed to tolerate these servers now. Bugfix on 0.1.2.x.
32548 o Minor bugfixes (controller):
32549 - Don't reset trusted dir server list when we set a configuration
32550 option. Patch from Robert Hogan; bugfix on 0.1.2.x.
32551 - Respond to INT and TERM SIGNAL commands before we execute the
32552 signal, in case the signal shuts us down. We had a patch in
32553 0.1.2.1-alpha that tried to do this by queueing the response on
32554 the connection's buffer before shutting down, but that really
32555 isn't the same thing at all. Bug located by Matt Edman.
32557 o Minor bugfixes (misc):
32558 - Correctly check for bad options to the "PublishServerDescriptor"
32559 config option. Bugfix on 0.2.0.1-alpha; reported by Matt Edman.
32560 - Stop leaking memory on failing case of base32_decode, and make
32561 it accept upper-case letters. Bugfixes on 0.2.0.7-alpha.
32562 - Don't try to download extrainfo documents when we're trying to
32563 fetch enough directory info to build a circuit: having enough
32564 info should get priority. Bugfix on 0.2.0.x.
32565 - Don't complain that "your server has not managed to confirm that its
32566 ports are reachable" if we haven't been able to build any circuits
32567 yet. Bug found by spending four hours without a v3 consensus. Bugfix
32569 - Detect the reason for failing to mmap a descriptor file we just
32570 wrote, and give a more useful log message. Fixes bug 533. Bugfix
32573 o Code simplifications and refactoring:
32574 - Remove support for the old bw_accounting file: we've been storing
32575 bandwidth accounting information in the state file since
32576 0.1.2.5-alpha. This may result in bandwidth accounting errors
32577 if you try to upgrade from 0.1.1.x or earlier, or if you try to
32578 downgrade to 0.1.1.x or earlier.
32579 - New convenience code to locate a file within the DataDirectory.
32580 - Move non-authority functionality out of dirvote.c.
32581 - Refactor the arguments for router_pick_{directory_|trusteddir}server
32582 so that they all take the same named flags.
32585 - Include the "tor-ctrl.sh" bash script by Stefan Behte to provide
32586 Unix users an easy way to script their Tor process (e.g. by
32587 adjusting bandwidth based on the time of the day).
32590 Changes in version 0.2.0.8-alpha - 2007-10-12
32591 This eighth development snapshot fixes a crash bug that's been bothering
32592 us since February 2007, lets bridge authorities store a list of bridge
32593 descriptors they've seen, gets v3 directory voting closer to working,
32594 starts caching v3 directory consensus documents on directory mirrors,
32595 and fixes a variety of smaller issues including some minor memory leaks.
32597 o Major features (router descriptor cache):
32598 - Store routers in a file called cached-descriptors instead of in
32599 cached-routers. Initialize cached-descriptors from cached-routers
32600 if the old format is around. The new format allows us to store
32601 annotations along with descriptors.
32602 - Use annotations to record the time we received each descriptor, its
32603 source, and its purpose.
32604 - Disable the SETROUTERPURPOSE controller command: it is now
32606 - Controllers should now specify cache=no or cache=yes when using
32607 the +POSTDESCRIPTOR command.
32608 - Bridge authorities now write bridge descriptors to disk, meaning
32609 we can export them to other programs and begin distributing them
32612 o Major features (directory authorities):
32613 - When a v3 authority is missing votes or signatures, it now tries
32615 - Directory authorities track weighted fractional uptime as well as
32616 weighted mean-time-between failures. WFU is suitable for deciding
32617 whether a node is "usually up", while MTBF is suitable for deciding
32618 whether a node is "likely to stay up." We need both, because
32619 "usually up" is a good requirement for guards, while "likely to
32620 stay up" is a good requirement for long-lived connections.
32622 o Major features (v3 directory system):
32623 - Caches now download v3 network status documents as needed,
32624 and download the descriptors listed in them.
32625 - All hosts now attempt to download and keep fresh v3 authority
32626 certificates, and re-attempt after failures.
32627 - More internal-consistency checks for vote parsing.
32629 o Major bugfixes (crashes):
32630 - If a connection is shut down abruptly because of something that
32631 happened inside connection_flushed_some(), do not call
32632 connection_finished_flushing(). Should fix bug 451. Bugfix on
32635 o Major bugfixes (performance):
32636 - Fix really bad O(n^2) performance when parsing a long list of
32637 routers: Instead of searching the entire list for an "extra-info "
32638 string which usually wasn't there, once for every routerinfo
32639 we read, just scan lines forward until we find one we like.
32641 - When we add data to a write buffer in response to the data on that
32642 write buffer getting low because of a flush, do not consider the
32643 newly added data as a candidate for immediate flushing, but rather
32644 make it wait until the next round of writing. Otherwise, we flush
32645 and refill recursively, and a single greedy TLS connection can
32646 eat all of our bandwidth. Bugfix on 0.1.2.7-alpha.
32648 o Minor features (v3 authority system):
32649 - Add more ways for tools to download the votes that lead to the
32651 - Send a 503 when low on bandwidth and a vote, consensus, or
32652 certificate is requested.
32653 - If-modified-since is now implemented properly for all kinds of
32654 certificate requests.
32656 o Minor bugfixes (network statuses):
32657 - Tweak the implementation of proposal 109 slightly: allow at most
32658 two Tor servers on the same IP address, except if it's the location
32659 of a directory authority, in which case allow five. Bugfix on
32662 o Minor bugfixes (controller):
32663 - When sending a status event to the controller telling it that an
32664 OR address is reachable, set the port correctly. (Previously we
32665 were reporting the dir port.) Bugfix on 0.1.2.x.
32667 o Minor bugfixes (v3 directory system):
32668 - Fix logic to look up a cert by its signing key digest. Bugfix on
32670 - Only change the reply to a vote to "OK" if it's not already
32671 set. This gets rid of annoying "400 OK" log messages, which may
32672 have been masking some deeper issue. Bugfix on 0.2.0.7-alpha.
32673 - When we get a valid consensus, recompute the voting schedule.
32674 - Base the valid-after time of a vote on the consensus voting
32675 schedule, not on our preferred schedule.
32676 - Make the return values and messages from signature uploads and
32677 downloads more sensible.
32678 - Fix a memory leak when serving votes and consensus documents, and
32679 another when serving certificates.
32681 o Minor bugfixes (performance):
32682 - Use a slightly simpler string hashing algorithm (copying Python's
32683 instead of Java's) and optimize our digest hashing algorithm to take
32684 advantage of 64-bit platforms and to remove some possibly-costly
32686 - Fix a minor memory leak whenever we parse guards from our state
32687 file. Bugfix on 0.2.0.7-alpha.
32688 - Fix a minor memory leak whenever we write out a file. Bugfix on
32690 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
32691 command. Bugfix on 0.2.0.5-alpha.
32693 o Minor bugfixes (portability):
32694 - On some platforms, accept() can return a broken address. Detect
32695 this more quietly, and deal accordingly. Fixes bug 483.
32696 - Stop calling tor_strlower() on uninitialized memory in some cases.
32697 Bugfix in 0.2.0.7-alpha.
32699 o Minor bugfixes (usability):
32700 - Treat some 403 responses from directory servers as INFO rather than
32701 WARN-severity events.
32702 - It's not actually an error to find a non-pending entry in the DNS
32703 cache when canceling a pending resolve. Don't log unless stuff is
32704 fishy. Resolves bug 463.
32706 o Minor bugfixes (anonymity):
32707 - Never report that we've used more bandwidth than we're willing to
32708 relay: it leaks how much non-relay traffic we're using. Resolves
32710 - When looking for a circuit to cannibalize, consider family as well
32711 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
32712 circuit cannibalization).
32714 o Code simplifications and refactoring:
32715 - Make a bunch of functions static. Remove some dead code.
32716 - Pull out about a third of the really big routerlist.c; put it in a
32717 new module, networkstatus.c.
32718 - Merge the extra fields in local_routerstatus_t back into
32719 routerstatus_t: we used to need one routerstatus_t for each
32720 authority's opinion, plus a local_routerstatus_t for the locally
32721 computed consensus opinion. To save space, we put the locally
32722 modified fields into local_routerstatus_t, and only the common
32723 stuff into routerstatus_t. But once v3 directories are in use,
32724 clients and caches will no longer need to hold authority opinions;
32725 thus, the rationale for keeping the types separate is now gone.
32726 - Make the code used to reschedule and reattempt downloads more
32728 - Turn all 'Are we a directory server/mirror?' logic into a call to
32730 - Remove the code to generate the oldest (v1) directory format.
32731 The code has been disabled since 0.2.0.5-alpha.
32734 Changes in version 0.2.0.7-alpha - 2007-09-21
32735 This seventh development snapshot makes bridges work again, makes bridge
32736 authorities work for the first time, fixes two huge performance flaws
32737 in hidden services, and fixes a variety of minor issues.
32739 o New directory authorities:
32740 - Set up moria1 and tor26 as the first v3 directory authorities. See
32741 doc/spec/dir-spec.txt for details on the new directory design.
32743 o Major bugfixes (crashes):
32744 - Fix possible segfaults in functions called from
32745 rend_process_relay_cell(). Bugfix on 0.1.2.x.
32747 o Major bugfixes (bridges):
32748 - Fix a bug that made servers send a "404 Not found" in response to
32749 attempts to fetch their server descriptor. This caused Tor servers
32750 to take many minutes to establish reachability for their DirPort,
32751 and it totally crippled bridges. Bugfix on 0.2.0.5-alpha.
32752 - Make "UpdateBridgesFromAuthority" torrc option work: when bridge
32753 users configure that and specify a bridge with an identity
32754 fingerprint, now they will lookup the bridge descriptor at the
32755 default bridge authority via a one-hop tunnel, but once circuits
32756 are established they will switch to a three-hop tunnel for later
32757 connections to the bridge authority. Bugfix in 0.2.0.3-alpha.
32759 o Major bugfixes (hidden services):
32760 - Hidden services were choosing introduction points uniquely by
32761 hexdigest, but when constructing the hidden service descriptor
32762 they merely wrote the (potentially ambiguous) nickname.
32763 - Clients now use the v2 intro format for hidden service
32764 connections: they specify their chosen rendezvous point by identity
32765 digest rather than by (potentially ambiguous) nickname. Both
32766 are bugfixes on 0.1.2.x, and they could speed up hidden service
32767 connections dramatically. Thanks to Karsten Loesing.
32769 o Minor features (security):
32770 - As a client, do not believe any server that tells us that an
32771 address maps to an internal address space.
32772 - Make it possible to enable HashedControlPassword and
32773 CookieAuthentication at the same time.
32775 o Minor features (guard nodes):
32776 - Tag every guard node in our state file with the version that
32777 we believe added it, or with our own version if we add it. This way,
32778 if a user temporarily runs an old version of Tor and then switches
32779 back to a new one, she doesn't automatically lose her guards.
32781 o Minor features (speed):
32782 - When implementing AES counter mode, update only the portions of the
32783 counter buffer that need to change, and don't keep separate
32784 network-order and host-order counters when they are the same (i.e.,
32785 on big-endian hosts.)
32787 o Minor features (controller):
32788 - Accept LF instead of CRLF on controller, since some software has a
32789 hard time generating real Internet newlines.
32790 - Add GETINFO values for the server status events
32791 "REACHABILITY_SUCCEEDED" and "GOOD_SERVER_DESCRIPTOR". Patch from
32794 o Removed features:
32795 - Routers no longer include bandwidth-history lines in their
32796 descriptors; this information is already available in extra-info
32797 documents, and including it in router descriptors took up 60%
32798 (!) of compressed router descriptor downloads. Completes
32799 implementation of proposal 104.
32800 - Remove the contrib scripts ExerciseServer.py, PathDemo.py,
32801 and TorControl.py, as they use the old v0 controller protocol,
32802 and are obsoleted by TorFlow anyway.
32803 - Drop support for v1 rendezvous descriptors, since we never used
32804 them anyway, and the code has probably rotted by now. Based on
32805 patch from Karsten Loesing.
32806 - On OSX, stop warning the user that kqueue support in libevent is
32807 "experimental", since it seems to have worked fine for ages.
32810 - When generating information telling us how to extend to a given
32811 router, do not try to include the nickname if it is absent. Fixes
32812 bug 467. Bugfix on 0.2.0.3-alpha.
32813 - Fix a user-triggerable (but not remotely-triggerable) segfault
32814 in expand_filename(). Bugfix on 0.1.2.x.
32815 - Fix a memory leak when freeing incomplete requests from DNSPort.
32816 Found by Niels Provos with valgrind. Bugfix on 0.2.0.1-alpha.
32817 - Don't try to access (or alter) the state file when running
32818 --list-fingerprint or --verify-config or --hash-password. (Resolves
32819 bug 499.) Bugfix on 0.1.2.x.
32820 - Servers used to decline to publish their DirPort if their
32821 BandwidthRate, RelayBandwidthRate, or MaxAdvertisedBandwidth
32822 were below a threshold. Now they only look at BandwidthRate and
32823 RelayBandwidthRate. Bugfix on 0.1.2.x.
32824 - Remove an optimization in the AES counter-mode code that assumed
32825 that the counter never exceeded 2^68. When the counter can be set
32826 arbitrarily as an IV (as it is by Karsten's new hidden services
32827 code), this assumption no longer holds. Bugfix on 0.1.2.x.
32828 - Resume listing "AUTHORITY" flag for authorities in network status.
32829 Bugfix on 0.2.0.3-alpha; reported by Alex de Joode.
32831 o Code simplifications and refactoring:
32832 - Revamp file-writing logic so we don't need to have the entire
32833 contents of a file in memory at once before we write to disk. Tor,
32835 - Turn "descriptor store" into a full-fledged type.
32836 - Move all NT services code into a separate source file.
32837 - Unify all code that computes medians, percentile elements, etc.
32838 - Get rid of a needless malloc when parsing address policies.
32841 Changes in version 0.1.2.17 - 2007-08-30
32842 Tor 0.1.2.17 features a new Vidalia version in the Windows and OS
32843 X bundles. Vidalia 0.0.14 makes authentication required for the
32844 ControlPort in the default configuration, which addresses important
32845 security risks. Everybody who uses Vidalia (or another controller)
32848 In addition, this Tor update fixes major load balancing problems with
32849 path selection, which should speed things up a lot once many people
32852 o Major bugfixes (security):
32853 - We removed support for the old (v0) control protocol. It has been
32854 deprecated since Tor 0.1.1.1-alpha, and keeping it secure has
32855 become more of a headache than it's worth.
32857 o Major bugfixes (load balancing):
32858 - When choosing nodes for non-guard positions, weight guards
32859 proportionally less, since they already have enough load. Patch
32861 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
32862 will allow fast Tor servers to get more attention.
32863 - When we're upgrading from an old Tor version, forget our current
32864 guards and pick new ones according to the new weightings. These
32865 three load balancing patches could raise effective network capacity
32866 by a factor of four. Thanks to Mike Perry for measurements.
32868 o Major bugfixes (stream expiration):
32869 - Expire not-yet-successful application streams in all cases if
32870 they've been around longer than SocksTimeout. Right now there are
32871 some cases where the stream will live forever, demanding a new
32872 circuit every 15 seconds. Fixes bug 454; reported by lodger.
32874 o Minor features (controller):
32875 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
32876 is valid before any authentication has been received. It tells
32877 a controller what kind of authentication is expected, and what
32878 protocol is spoken. Implements proposal 119.
32880 o Minor bugfixes (performance):
32881 - Save on most routerlist_assert_ok() calls in routerlist.c, thus
32882 greatly speeding up loading cached-routers from disk on startup.
32883 - Disable sentinel-based debugging for buffer code: we squashed all
32884 the bugs that this was supposed to detect a long time ago, and now
32885 its only effect is to change our buffer sizes from nice powers of
32886 two (which platform mallocs tend to like) to values slightly over
32887 powers of two (which make some platform mallocs sad).
32889 o Minor bugfixes (misc):
32890 - If exit bandwidth ever exceeds one third of total bandwidth, then
32891 use the correct formula to weight exit nodes when choosing paths.
32892 Based on patch from Mike Perry.
32893 - Choose perfectly fairly among routers when choosing by bandwidth and
32894 weighting by fraction of bandwidth provided by exits. Previously, we
32895 would choose with only approximate fairness, and correct ourselves
32896 if we ran off the end of the list.
32897 - If we require CookieAuthentication but we fail to write the
32898 cookie file, we would warn but not exit, and end up in a state
32899 where no controller could authenticate. Now we exit.
32900 - If we require CookieAuthentication, stop generating a new cookie
32901 every time we change any piece of our config.
32902 - Refuse to start with certain directory authority keys, and
32903 encourage people using them to stop.
32904 - Terminate multi-line control events properly. Original patch
32906 - Fix a minor memory leak when we fail to find enough suitable
32907 servers to choose a circuit.
32908 - Stop leaking part of the descriptor when we run into a particularly
32909 unparseable piece of it.
32912 Changes in version 0.2.0.6-alpha - 2007-08-26
32913 This sixth development snapshot features a new Vidalia version in the
32914 Windows and OS X bundles. Vidalia 0.0.14 makes authentication required for
32915 the ControlPort in the default configuration, which addresses important
32918 In addition, this snapshot fixes major load balancing problems
32919 with path selection, which should speed things up a lot once many
32920 people have upgraded. The directory authorities also use a new
32921 mean-time-between-failure approach to tracking which servers are stable,
32922 rather than just looking at the most recent uptime.
32924 o New directory authorities:
32925 - Set up Tonga as the default bridge directory authority.
32928 - Directory authorities now track servers by weighted
32929 mean-times-between-failures. When we have 4 or more days of data,
32930 use measured MTBF rather than declared uptime to decide whether
32931 to call a router Stable. Implements proposal 108.
32933 o Major bugfixes (load balancing):
32934 - When choosing nodes for non-guard positions, weight guards
32935 proportionally less, since they already have enough load. Patch
32937 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
32938 will allow fast Tor servers to get more attention.
32939 - When we're upgrading from an old Tor version, forget our current
32940 guards and pick new ones according to the new weightings. These
32941 three load balancing patches could raise effective network capacity
32942 by a factor of four. Thanks to Mike Perry for measurements.
32944 o Major bugfixes (descriptor parsing):
32945 - Handle unexpected whitespace better in malformed descriptors. Bug
32946 found using Benedikt Boss's new Tor fuzzer! Bugfix on 0.2.0.x.
32949 - There is now an ugly, temporary "desc/all-recent-extrainfo-hack"
32950 GETINFO for Torstat to use until it can switch to using extrainfos.
32951 - Optionally (if built with -DEXPORTMALLINFO) export the output
32952 of mallinfo via http, as tor/mallinfo.txt. Only accessible
32956 - Do not intermix bridge routers with controller-added
32957 routers. (Bugfix on 0.2.0.x)
32958 - Do not fail with an assert when accept() returns an unexpected
32959 address family. Addresses but does not wholly fix bug 483. (Bugfix
32961 - Let directory authorities startup even when they can't generate
32962 a descriptor immediately, e.g. because they don't know their
32964 - Stop putting the authentication cookie in a file called "0"
32965 in your working directory if you don't specify anything for the
32966 new CookieAuthFile option. Reported by Matt Edman.
32967 - Make it possible to read the PROTOCOLINFO response in a way that
32968 conforms to our control-spec. Reported by Matt Edman.
32969 - Fix a minor memory leak when we fail to find enough suitable
32970 servers to choose a circuit. Bugfix on 0.1.2.x.
32971 - Stop leaking part of the descriptor when we run into a particularly
32972 unparseable piece of it. Bugfix on 0.1.2.x.
32973 - Unmap the extrainfo cache file on exit.
32976 Changes in version 0.2.0.5-alpha - 2007-08-19
32977 This fifth development snapshot fixes compilation on Windows again;
32978 fixes an obnoxious client-side bug that slowed things down and put
32979 extra load on the network; gets us closer to using the v3 directory
32980 voting scheme; makes it easier for Tor controllers to use cookie-based
32981 authentication; and fixes a variety of other bugs.
32983 o Removed features:
32984 - Version 1 directories are no longer generated in full. Instead,
32985 authorities generate and serve "stub" v1 directories that list
32986 no servers. This will stop Tor versions 0.1.0.x and earlier from
32987 working, but (for security reasons) nobody should be running those
32990 o Major bugfixes (compilation, 0.2.0.x):
32991 - Try to fix Win32 compilation again: improve checking for IPv6 types.
32992 - Try to fix MSVC compilation: build correctly on platforms that do
32993 not define s6_addr16 or s6_addr32.
32994 - Fix compile on platforms without getaddrinfo: bug found by Li-Hui
32997 o Major bugfixes (stream expiration):
32998 - Expire not-yet-successful application streams in all cases if
32999 they've been around longer than SocksTimeout. Right now there are
33000 some cases where the stream will live forever, demanding a new
33001 circuit every 15 seconds. Bugfix on 0.1.2.7-alpha; fixes bug 454;
33002 reported by lodger.
33004 o Minor features (directory servers):
33005 - When somebody requests a list of statuses or servers, and we have
33006 none of those, return a 404 rather than an empty 200.
33008 o Minor features (directory voting):
33009 - Store v3 consensus status consensuses on disk, and reload them
33012 o Minor features (security):
33013 - Warn about unsafe ControlPort configurations.
33014 - Refuse to start with certain directory authority keys, and
33015 encourage people using them to stop.
33017 o Minor features (controller):
33018 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
33019 is valid before any authentication has been received. It tells
33020 a controller what kind of authentication is expected, and what
33021 protocol is spoken. Implements proposal 119.
33022 - New config option CookieAuthFile to choose a new location for the
33023 cookie authentication file, and config option
33024 CookieAuthFileGroupReadable to make it group-readable.
33026 o Minor features (unit testing):
33027 - Add command-line arguments to unit-test executable so that we can
33028 invoke any chosen test from the command line rather than having
33029 to run the whole test suite at once; and so that we can turn on
33030 logging for the unit tests.
33032 o Minor bugfixes (on 0.1.2.x):
33033 - If we require CookieAuthentication but we fail to write the
33034 cookie file, we would warn but not exit, and end up in a state
33035 where no controller could authenticate. Now we exit.
33036 - If we require CookieAuthentication, stop generating a new cookie
33037 every time we change any piece of our config.
33038 - When loading bandwidth history, do not believe any information in
33039 the future. Fixes bug 434.
33040 - When loading entry guard information, do not believe any information
33042 - When we have our clock set far in the future and generate an
33043 onion key, then re-set our clock to be correct, we should not stop
33044 the onion key from getting rotated.
33045 - Clean up torrc sample config file.
33046 - Do not automatically run configure from autogen.sh. This
33047 non-standard behavior tended to annoy people who have built other
33050 o Minor bugfixes (on 0.2.0.x):
33051 - Fix a bug with AutomapHostsOnResolve that would always cause
33052 the second request to fail. Bug reported by Kate. Bugfix on
33054 - Fix a bug in ADDRMAP controller replies that would sometimes
33055 try to print a NULL. Patch from tup.
33056 - Read v3 directory authority keys from the right location.
33057 - Numerous bugfixes to directory voting code.
33060 Changes in version 0.1.2.16 - 2007-08-01
33061 Tor 0.1.2.16 fixes a critical security vulnerability that allows a
33062 remote attacker in certain situations to rewrite the user's torrc
33063 configuration file. This can completely compromise anonymity of users
33064 in most configurations, including those running the Vidalia bundles,
33065 TorK, etc. Or worse.
33067 o Major security fixes:
33068 - Close immediately after missing authentication on control port;
33069 do not allow multiple authentication attempts.
33072 Changes in version 0.2.0.4-alpha - 2007-08-01
33073 This fourth development snapshot fixes a critical security vulnerability
33074 for most users, specifically those running Vidalia, TorK, etc. Everybody
33075 should upgrade to either 0.1.2.16 or 0.2.0.4-alpha.
33077 o Major security fixes:
33078 - Close immediately after missing authentication on control port;
33079 do not allow multiple authentication attempts.
33081 o Major bugfixes (compilation):
33082 - Fix win32 compilation: apparently IN_ADDR and IN6_ADDR are already
33085 o Minor features (performance):
33086 - Be even more aggressive about releasing RAM from small
33087 empty buffers. Thanks to our free-list code, this shouldn't be too
33088 performance-intensive.
33089 - Disable sentinel-based debugging for buffer code: we squashed all
33090 the bugs that this was supposed to detect a long time ago, and
33091 now its only effect is to change our buffer sizes from nice
33092 powers of two (which platform mallocs tend to like) to values
33093 slightly over powers of two (which make some platform mallocs sad).
33094 - Log malloc statistics from mallinfo() on platforms where it
33098 Changes in version 0.2.0.3-alpha - 2007-07-29
33099 This third development snapshot introduces new experimental
33100 blocking-resistance features and a preliminary version of the v3
33101 directory voting design, and includes many other smaller features
33105 - The first pieces of our "bridge" design for blocking-resistance
33106 are implemented. People can run bridge directory authorities;
33107 people can run bridges; and people can configure their Tor clients
33108 with a set of bridges to use as the first hop into the Tor network.
33109 See http://archives.seul.org/or/talk/Jul-2007/msg00249.html for
33111 - Create listener connections before we setuid to the configured
33112 User and Group. Now non-Windows users can choose port values
33113 under 1024, start Tor as root, and have Tor bind those ports
33114 before it changes to another UID. (Windows users could already
33116 - Added a new ConstrainedSockets config option to set SO_SNDBUF and
33117 SO_RCVBUF on TCP sockets. Hopefully useful for Tor servers running
33118 on "vserver" accounts. (Patch from coderman.)
33119 - Be even more aggressive about separating local traffic from relayed
33120 traffic when RelayBandwidthRate is set. (Refines proposal 111.)
33122 o Major features (experimental):
33123 - First cut of code for "v3 dir voting": directory authorities will
33124 vote on a common network status document rather than each publishing
33125 their own opinion. This code needs more testing and more corner-case
33126 handling before it's ready for use.
33129 - Directory authorities now call routers Fast if their bandwidth is
33130 at least 100KB/s, and consider their bandwidth adequate to be a
33131 Guard if it is at least 250KB/s, no matter the medians. This fix
33132 complements proposal 107. [Bugfix on 0.1.2.x]
33133 - Directory authorities now never mark more than 3 servers per IP as
33134 Valid and Running. (Implements proposal 109, by Kevin Bauer and
33136 - Minor change to organizationName and commonName generation
33137 procedures in TLS certificates during Tor handshakes, to invalidate
33138 some earlier censorware approaches. This is not a long-term
33139 solution, but applying it will give us a bit of time to look into
33140 the epidemiology of countermeasures as they spread.
33142 o Major bugfixes (directory):
33143 - Rewrite directory tokenization code to never run off the end of
33144 a string. Fixes bug 455. Patch from croup. [Bugfix on 0.1.2.x]
33146 o Minor features (controller):
33147 - Add a SOURCE_ADDR field to STREAM NEW events so that controllers can
33148 match requests to applications. (Patch from Robert Hogan.)
33149 - Report address and port correctly on connections to DNSPort. (Patch
33150 from Robert Hogan.)
33151 - Add a RESOLVE command to launch hostname lookups. (Original patch
33152 from Robert Hogan.)
33153 - Add GETINFO status/enough-dir-info to let controllers tell whether
33154 Tor has downloaded sufficient directory information. (Patch
33156 - You can now use the ControlSocket option to tell Tor to listen for
33157 controller connections on Unix domain sockets on systems that
33158 support them. (Patch from Peter Palfrader.)
33159 - STREAM NEW events are generated for DNSPort requests and for
33160 tunneled directory connections. (Patch from Robert Hogan.)
33161 - New "GETINFO address-mappings/*" command to get address mappings
33162 with expiry information. "addr-mappings/*" is now deprecated.
33165 o Minor features (misc):
33166 - Merge in some (as-yet-unused) IPv6 address manipulation code. (Patch
33168 - The tor-gencert tool for v3 directory authorities now creates all
33169 files as readable to the file creator only, and write-protects
33170 the authority identity key.
33171 - When dumping memory usage, list bytes used in buffer memory
33173 - When running with dmalloc, dump more stats on hup and on exit.
33174 - Directory authorities now fail quickly and (relatively) harmlessly
33175 if they generate a network status document that is somehow
33178 o Traffic load balancing improvements:
33179 - If exit bandwidth ever exceeds one third of total bandwidth, then
33180 use the correct formula to weight exit nodes when choosing paths.
33181 (Based on patch from Mike Perry.)
33182 - Choose perfectly fairly among routers when choosing by bandwidth and
33183 weighting by fraction of bandwidth provided by exits. Previously, we
33184 would choose with only approximate fairness, and correct ourselves
33185 if we ran off the end of the list. [Bugfix on 0.1.2.x]
33187 o Performance improvements:
33188 - Be more aggressive with freeing buffer RAM or putting it on the
33190 - Use Critical Sections rather than Mutexes for synchronizing threads
33191 on win32; Mutexes are heavier-weight, and designed for synchronizing
33194 o Deprecated and removed features:
33195 - RedirectExits is now deprecated.
33196 - Stop allowing address masks that do not correspond to bit prefixes.
33197 We have warned about these for a really long time; now it's time
33198 to reject them. (Patch from croup.)
33200 o Minor bugfixes (directory):
33201 - Fix another crash bug related to extra-info caching. (Bug found by
33202 Peter Palfrader.) [Bugfix on 0.2.0.2-alpha]
33203 - Directories no longer return a "304 not modified" when they don't
33204 have the networkstatus the client asked for. Also fix a memory
33205 leak when returning 304 not modified. [Bugfixes on 0.2.0.2-alpha]
33206 - We had accidentally labelled 0.1.2.x directory servers as not
33207 suitable for begin_dir requests, and had labelled no directory
33208 servers as suitable for uploading extra-info documents. [Bugfix
33211 o Minor bugfixes (dns):
33212 - Fix a crash when DNSPort is set more than once. (Patch from Robert
33213 Hogan.) [Bugfix on 0.2.0.2-alpha]
33214 - Add DNSPort connections to the global connection list, so that we
33215 can time them out correctly. (Bug found by Robert Hogan.) [Bugfix
33217 - Fix a dangling reference that could lead to a crash when DNSPort is
33218 changed or closed (Patch from Robert Hogan.) [Bugfix on
33221 o Minor bugfixes (controller):
33222 - Provide DNS expiry times in GMT, not in local time. For backward
33223 compatibility, ADDRMAP events only provide GMT expiry in an extended
33224 field. "GETINFO address-mappings" always does the right thing.
33225 - Use CRLF line endings properly in NS events.
33226 - Terminate multi-line control events properly. (Original patch
33227 from tup.) [Bugfix on 0.1.2.x-alpha]
33228 - Do not include spaces in SOURCE_ADDR fields in STREAM
33229 events. Resolves bug 472. [Bugfix on 0.2.0.x-alpha]
33232 Changes in version 0.1.2.15 - 2007-07-17
33233 Tor 0.1.2.15 fixes several crash bugs, fixes some anonymity-related
33234 problems, fixes compilation on BSD, and fixes a variety of other
33235 bugs. Everybody should upgrade.
33237 o Major bugfixes (compilation):
33238 - Fix compile on FreeBSD/NetBSD/OpenBSD. Oops.
33240 o Major bugfixes (crashes):
33241 - Try even harder not to dereference the first character after
33242 an mmap(). Reported by lodger.
33243 - Fix a crash bug in directory authorities when we re-number the
33244 routerlist while inserting a new router.
33245 - When the cached-routers file is an even multiple of the page size,
33246 don't run off the end and crash. (Fixes bug 455; based on idea
33248 - Fix eventdns.c behavior on Solaris: It is critical to include
33249 orconfig.h _before_ sys/types.h, so that we can get the expected
33250 definition of _FILE_OFFSET_BITS.
33252 o Major bugfixes (security):
33253 - Fix a possible buffer overrun when using BSD natd support. Bug
33255 - When sending destroy cells from a circuit's origin, don't include
33256 the reason for tearing down the circuit. The spec says we didn't,
33257 and now we actually don't. Reported by lodger.
33258 - Keep streamids from different exits on a circuit separate. This
33259 bug may have allowed other routers on a given circuit to inject
33260 cells into streams. Reported by lodger; fixes bug 446.
33261 - If there's a never-before-connected-to guard node in our list,
33262 never choose any guards past it. This way we don't expand our
33263 guard list unless we need to.
33265 o Minor bugfixes (guard nodes):
33266 - Weight guard selection by bandwidth, so that low-bandwidth nodes
33267 don't get overused as guards.
33269 o Minor bugfixes (directory):
33270 - Correctly count the number of authorities that recommend each
33271 version. Previously, we were under-counting by 1.
33272 - Fix a potential crash bug when we load many server descriptors at
33273 once and some of them make others of them obsolete. Fixes bug 458.
33275 o Minor bugfixes (hidden services):
33276 - Stop tearing down the whole circuit when the user asks for a
33277 connection to a port that the hidden service didn't configure.
33280 o Minor bugfixes (misc):
33281 - On Windows, we were preventing other processes from reading
33282 cached-routers while Tor was running. Reported by janbar.
33283 - Fix a possible (but very unlikely) bug in picking routers by
33284 bandwidth. Add a log message to confirm that it is in fact
33285 unlikely. Patch from lodger.
33286 - Backport a couple of memory leak fixes.
33287 - Backport miscellaneous cosmetic bugfixes.
33290 Changes in version 0.2.0.2-alpha - 2007-06-02
33291 o Major bugfixes on 0.2.0.1-alpha:
33292 - Fix an assertion failure related to servers without extra-info digests.
33293 Resolves bugs 441 and 442.
33295 o Minor features (directory):
33296 - Support "If-Modified-Since" when answering HTTP requests for
33297 directories, running-routers documents, and network-status documents.
33298 (There's no need to support it for router descriptors, since those
33299 are downloaded by descriptor digest.)
33301 o Minor build issues:
33302 - Clear up some MIPSPro compiler warnings.
33303 - When building from a tarball on a machine that happens to have SVK
33304 installed, report the micro-revision as whatever version existed
33305 in the tarball, not as "x".
33308 Changes in version 0.2.0.1-alpha - 2007-06-01
33309 This early development snapshot provides new features for people running
33310 Tor as both a client and a server (check out the new RelayBandwidth
33311 config options); lets Tor run as a DNS proxy; and generally moves us
33312 forward on a lot of fronts.
33314 o Major features, server usability:
33315 - New config options RelayBandwidthRate and RelayBandwidthBurst:
33316 a separate set of token buckets for relayed traffic. Right now
33317 relayed traffic is defined as answers to directory requests, and
33318 OR connections that don't have any local circuits on them.
33320 o Major features, client usability:
33321 - A client-side DNS proxy feature to replace the need for
33322 dns-proxy-tor: Just set "DNSPort 9999", and Tor will now listen
33323 for DNS requests on port 9999, use the Tor network to resolve them
33324 anonymously, and send the reply back like a regular DNS server.
33325 The code still only implements a subset of DNS.
33326 - Make PreferTunneledDirConns and TunnelDirConns work even when
33327 we have no cached directory info. This means Tor clients can now
33328 do all of their connections protected by TLS.
33330 o Major features, performance and efficiency:
33331 - Directory authorities accept and serve "extra info" documents for
33332 routers. These documents contain fields from router descriptors
33333 that aren't usually needed, and that use a lot of excess
33334 bandwidth. Once these fields are removed from router descriptors,
33335 the bandwidth savings should be about 60%. [Partially implements
33337 - Servers upload extra-info documents to any authority that accepts
33338 them. Authorities (and caches that have been configured to download
33339 extra-info documents) download them as needed. [Partially implements
33341 - Change the way that Tor buffers data that it is waiting to write.
33342 Instead of queueing data cells in an enormous ring buffer for each
33343 client->OR or OR->OR connection, we now queue cells on a separate
33344 queue for each circuit. This lets us use less slack memory, and
33345 will eventually let us be smarter about prioritizing different kinds
33347 - Use memory pools to allocate cells with better speed and memory
33348 efficiency, especially on platforms where malloc() is inefficient.
33349 - Stop reading on edge connections when their corresponding circuit
33350 buffers are full; start again as the circuits empty out.
33352 o Major features, other:
33353 - Add an HSAuthorityRecordStats option that hidden service authorities
33354 can use to track statistics of overall hidden service usage without
33355 logging information that would be very useful to an attacker.
33356 - Start work implementing multi-level keys for directory authorities:
33357 Add a standalone tool to generate key certificates. (Proposal 103.)
33360 - Directory authorities now call routers Stable if they have an
33361 uptime of at least 30 days, even if that's not the median uptime
33362 in the network. Implements proposal 107, suggested by Kevin Bauer
33365 o Minor fixes (resource management):
33366 - Count the number of open sockets separately from the number
33367 of active connection_t objects. This will let us avoid underusing
33368 our allocated connection limit.
33369 - We no longer use socket pairs to link an edge connection to an
33370 anonymous directory connection or a DirPort test connection.
33371 Instead, we track the link internally and transfer the data
33372 in-process. This saves two sockets per "linked" connection (at the
33373 client and at the server), and avoids the nasty Windows socketpair()
33375 - Keep unused 4k and 16k buffers on free lists, rather than wasting 8k
33376 for every single inactive connection_t. Free items from the
33377 4k/16k-buffer free lists when they haven't been used for a while.
33379 o Minor features (build):
33380 - Make autoconf search for libevent, openssl, and zlib consistently.
33381 - Update deprecated macros in configure.in.
33382 - When warning about missing headers, tell the user to let us
33383 know if the compile succeeds anyway, so we can downgrade the
33385 - Include the current subversion revision as part of the version
33386 string: either fetch it directly if we're in an SVN checkout, do
33387 some magic to guess it if we're in an SVK checkout, or use
33388 the last-detected version if we're building from a .tar.gz.
33389 Use this version consistently in log messages.
33391 o Minor features (logging):
33392 - Always prepend "Bug: " to any log message about a bug.
33393 - Put a platform string (e.g. "Linux i686") in the startup log
33394 message, so when people paste just their logs, we know if it's
33395 OpenBSD or Windows or what.
33396 - When logging memory usage, break down memory used in buffers by
33399 o Minor features (directory system):
33400 - New config option V2AuthoritativeDirectory that all directory
33401 authorities should set. This will let future authorities choose
33402 not to serve V2 directory information.
33403 - Directory authorities allow multiple router descriptors and/or extra
33404 info documents to be uploaded in a single go. This will make
33405 implementing proposal 104 simpler.
33407 o Minor features (controller):
33408 - Add a new config option __DisablePredictedCircuits designed for
33409 use by the controller, when we don't want Tor to build any circuits
33411 - Let the controller specify HOP=%d as an argument to ATTACHSTREAM,
33412 so we can exit from the middle of the circuit.
33413 - Implement "getinfo status/circuit-established".
33414 - Implement "getinfo status/version/..." so a controller can tell
33415 whether the current version is recommended, and whether any versions
33416 are good, and how many authorities agree. (Patch from shibz.)
33418 o Minor features (hidden services):
33419 - Allow multiple HiddenServicePort directives with the same virtual
33420 port; when they occur, the user is sent round-robin to one
33421 of the target ports chosen at random. Partially fixes bug 393 by
33422 adding limited ad-hoc round-robining.
33424 o Minor features (other):
33426 - Add a new AutomapHostsOnResolve option: when it is enabled, any
33427 resolve request for hosts matching a given pattern causes Tor to
33428 generate an internal virtual address mapping for that host. This
33429 allows DNSPort to work sensibly with hidden service users. By
33430 default, .exit and .onion addresses are remapped; the list of
33431 patterns can be reconfigured with AutomapHostsSuffixes.
33432 - Add an "-F" option to tor-resolve to force a resolve for a .onion
33433 address. Thanks to the AutomapHostsOnResolve option, this is no
33434 longer a completely silly thing to do.
33435 - If Tor is invoked from something that isn't a shell (e.g. Vidalia),
33436 now we expand "-f ~/.tor/torrc" correctly. Suggested by Matt Edman.
33437 - Treat "2gb" when given in torrc for a bandwidth as meaning 2gb,
33438 minus 1 byte: the actual maximum declared bandwidth.
33440 o Removed features:
33441 - Removed support for the old binary "version 0" controller protocol.
33442 This has been deprecated since 0.1.1, and warnings have been issued
33443 since 0.1.2. When we encounter a v0 control message, we now send
33444 back an error and close the connection.
33445 - Remove the old "dns worker" server DNS code: it hasn't been default
33446 since 0.1.2.2-alpha, and all the servers seem to be using the new
33449 o Minor bugfixes (portability):
33450 - Even though Windows is equally happy with / and \ as path separators,
33451 try to use \ consistently on Windows and / consistently on Unix: it
33452 makes the log messages nicer.
33453 - Correctly report platform name on Windows 95 OSR2 and Windows 98 SE.
33454 - Read resolv.conf files correctly on platforms where read() returns
33455 partial results on small file reads.
33457 o Minor bugfixes (directory):
33458 - Correctly enforce that elements of directory objects do not appear
33459 more often than they are allowed to appear.
33460 - When we are reporting the DirServer line we just parsed, we were
33461 logging the second stanza of the key fingerprint, not the first.
33463 o Minor bugfixes (logging):
33464 - When we hit an EOF on a log (probably because we're shutting down),
33465 don't try to remove the log from the list: just mark it as
33466 unusable. (Bulletproofs against bug 222.)
33468 o Minor bugfixes (other):
33469 - In the exitlist script, only consider the most recently published
33470 server descriptor for each server. Also, when the user requests
33471 a list of servers that _reject_ connections to a given address,
33472 explicitly exclude the IPs that also have servers that accept
33473 connections to that address. (Resolves bug 405.)
33474 - Stop allowing hibernating servers to be "stable" or "fast".
33475 - On Windows, we were preventing other processes from reading
33476 cached-routers while Tor was running. (Reported by janbar)
33477 - Make the NodeFamilies config option work. (Reported by
33478 lodger -- it has never actually worked, even though we added it
33480 - Check return values from pthread_mutex functions.
33481 - Don't save non-general-purpose router descriptors to the disk cache,
33482 because we have no way of remembering what their purpose was when
33484 - Add even more asserts to hunt down bug 417.
33485 - Build without verbose warnings even on (not-yet-released) gcc 4.2.
33486 - Fix a possible (but very unlikely) bug in picking routers by bandwidth.
33487 Add a log message to confirm that it is in fact unlikely.
33489 o Minor bugfixes (controller):
33490 - Make 'getinfo fingerprint' return a 551 error if we're not a
33491 server, so we match what the control spec claims we do. Reported
33493 - Fix a typo in an error message when extendcircuit fails that
33494 caused us to not follow the \r\n-based delimiter protocol. Reported
33497 o Code simplifications and refactoring:
33498 - Stop passing around circuit_t and crypt_path_t pointers that are
33499 implicit in other procedure arguments.
33500 - Drop the old code to choke directory connections when the
33501 corresponding OR connections got full: thanks to the cell queue
33502 feature, OR conns don't get full any more.
33503 - Make dns_resolve() handle attaching connections to circuits
33504 properly, so the caller doesn't have to.
33505 - Rename wants_to_read and wants_to_write to read/write_blocked_on_bw.
33506 - Keep the connection array as a dynamic smartlist_t, rather than as
33507 a fixed-sized array. This is important, as the number of connections
33508 is becoming increasingly decoupled from the number of sockets.
33511 Changes in version 0.1.2.14 - 2007-05-25
33512 Tor 0.1.2.14 changes the addresses of two directory authorities (this
33513 change especially affects those who serve or use hidden services),
33514 and fixes several other crash- and security-related bugs.
33516 o Directory authority changes:
33517 - Two directory authorities (moria1 and moria2) just moved to new
33518 IP addresses. This change will particularly affect those who serve
33519 or use hidden services.
33521 o Major bugfixes (crashes):
33522 - If a directory server runs out of space in the connection table
33523 as it's processing a begin_dir request, it will free the exit stream
33524 but leave it attached to the circuit, leading to unpredictable
33525 behavior. (Reported by seeess, fixes bug 425.)
33526 - Fix a bug in dirserv_remove_invalid() that would cause authorities
33527 to corrupt memory under some really unlikely scenarios.
33528 - Tighten router parsing rules. (Bugs reported by Benedikt Boss.)
33529 - Avoid segfaults when reading from mmaped descriptor file. (Reported
33532 o Major bugfixes (security):
33533 - When choosing an entry guard for a circuit, avoid using guards
33534 that are in the same family as the chosen exit -- not just guards
33535 that are exactly the chosen exit. (Reported by lodger.)
33537 o Major bugfixes (resource management):
33538 - If a directory authority is down, skip it when deciding where to get
33539 networkstatus objects or descriptors. Otherwise we keep asking
33540 every 10 seconds forever. Fixes bug 384.
33541 - Count it as a failure if we fetch a valid network-status but we
33542 don't want to keep it. Otherwise we'll keep fetching it and keep
33543 not wanting to keep it. Fixes part of bug 422.
33544 - If all of our dirservers have given us bad or no networkstatuses
33545 lately, then stop hammering them once per minute even when we
33546 think they're failed. Fixes another part of bug 422.
33549 - Actually set the purpose correctly for descriptors inserted with
33550 purpose=controller.
33551 - When we have k non-v2 authorities in our DirServer config,
33552 we ignored the last k authorities in the list when updating our
33554 - Correctly back-off from requesting router descriptors that we are
33555 having a hard time downloading.
33556 - Read resolv.conf files correctly on platforms where read() returns
33557 partial results on small file reads.
33558 - Don't rebuild the entire router store every time we get 32K of
33559 routers: rebuild it when the journal gets very large, or when
33560 the gaps in the store get very large.
33563 - When routers publish SVN revisions in their router descriptors,
33564 authorities now include those versions correctly in networkstatus
33566 - Warn when using a version of libevent before 1.3b to run a server on
33567 OSX or BSD: these versions interact badly with userspace threads.
33570 Changes in version 0.1.2.13 - 2007-04-24
33571 This release features some major anonymity fixes, such as safer path
33572 selection; better client performance; faster bootstrapping, better
33573 address detection, and better DNS support for servers; write limiting as
33574 well as read limiting to make servers easier to run; and a huge pile of
33575 other features and bug fixes. The bundles also ship with Vidalia 0.0.11.
33577 Tor 0.1.2.13 is released in memory of Rob Levin (1955-2006), aka lilo
33578 of the Freenode IRC network, remembering his patience and vision for
33579 free speech on the Internet.
33582 - Fix a memory leak when we ask for "all" networkstatuses and we
33583 get one we don't recognize.
33584 - Add more asserts to hunt down bug 417.
33585 - Disable kqueue on OS X 10.3 and earlier, to fix bug 371.
33588 Changes in version 0.1.2.12-rc - 2007-03-16
33590 - Fix an infinite loop introduced in 0.1.2.7-alpha when we serve
33591 directory information requested inside Tor connections (i.e. via
33592 begin_dir cells). It only triggered when the same connection was
33593 serving other data at the same time. Reported by seeess.
33596 - When creating a circuit via the controller, send a 'launched'
33597 event when we're done, so we follow the spec better.
33600 Changes in version 0.1.2.11-rc - 2007-03-15
33601 o Minor bugfixes (controller), reported by daejees:
33602 - Correct the control spec to match how the code actually responds
33603 to 'getinfo addr-mappings/*'.
33604 - The control spec described a GUARDS event, but the code
33605 implemented a GUARD event. Standardize on GUARD, but let people
33606 ask for GUARDS too.
33609 Changes in version 0.1.2.10-rc - 2007-03-07
33610 o Major bugfixes (Windows):
33611 - Do not load the NT services library functions (which may not exist)
33612 just to detect if we're a service trying to shut down. Now we run
33613 on Win98 and friends again.
33615 o Minor bugfixes (other):
33616 - Clarify a couple of log messages.
33617 - Fix a misleading socks5 error number.
33620 Changes in version 0.1.2.9-rc - 2007-03-02
33621 o Major bugfixes (Windows):
33622 - On MinGW, use "%I64u" to printf/scanf 64-bit integers, instead
33623 of the usual GCC "%llu". This prevents a bug when saving 64-bit
33624 int configuration values: the high-order 32 bits would get
33625 truncated. In particular, we were being bitten by the default
33626 MaxAdvertisedBandwidth of 128 TB turning into 0. (Fixes bug 400
33627 and maybe also bug 397.)
33629 o Minor bugfixes (performance):
33630 - Use OpenSSL's AES implementation on platforms where it's faster.
33631 This could save us as much as 10% CPU usage.
33633 o Minor bugfixes (server):
33634 - Do not rotate onion key immediately after setting it for the first
33637 o Minor bugfixes (directory authorities):
33638 - Stop calling servers that have been hibernating for a long time
33639 "stable". Also, stop letting hibernating or obsolete servers affect
33640 uptime and bandwidth cutoffs.
33641 - Stop listing hibernating servers in the v1 directory.
33643 o Minor bugfixes (hidden services):
33644 - Upload hidden service descriptors slightly less often, to reduce
33645 load on authorities.
33647 o Minor bugfixes (other):
33648 - Fix an assert that could trigger if a controller quickly set then
33649 cleared EntryNodes. Bug found by Udo van den Heuvel.
33650 - On architectures where sizeof(int)>4, still clamp declarable bandwidth
33652 - Fix a potential race condition in the rpm installer. Found by
33654 - Try to fix eventdns warnings once and for all: do not treat a dns rcode
33655 of 2 as indicating that the server is completely bad; it sometimes
33656 means that the server is just bad for the request in question. (may fix
33657 the last of bug 326.)
33658 - Disable encrypted directory connections when we don't have a server
33659 descriptor for the destination. We'll get this working again in
33663 Changes in version 0.1.2.8-beta - 2007-02-26
33664 o Major bugfixes (crashes):
33665 - Stop crashing when the controller asks us to resetconf more than
33666 one config option at once. (Vidalia 0.0.11 does this.)
33667 - Fix a crash that happened on Win98 when we're given command-line
33668 arguments: don't try to load NT service functions from advapi32.dll
33669 except when we need them. (Bug introduced in 0.1.2.7-alpha;
33671 - Fix a longstanding obscure crash bug that could occur when
33672 we run out of DNS worker processes. (Resolves bug 390.)
33674 o Major bugfixes (hidden services):
33675 - Correctly detect whether hidden service descriptor downloads are
33676 in-progress. (Suggested by Karsten Loesing; fixes bug 399.)
33678 o Major bugfixes (accounting):
33679 - When we start during an accounting interval before it's time to wake
33680 up, remember to wake up at the correct time. (May fix bug 342.)
33682 o Minor bugfixes (controller):
33683 - Give the controller END_STREAM_REASON_DESTROY events _before_ we
33684 clear the corresponding on_circuit variable, and remember later
33685 that we don't need to send a redundant CLOSED event. Resolves part
33687 - Report events where a resolve succeeded or where we got a socks
33688 protocol error correctly, rather than calling both of them
33690 - Change reported stream target addresses to IP consistently when
33691 we finally get the IP from an exit node.
33692 - Send log messages to the controller even if they happen to be very
33695 o Minor bugfixes (other):
33696 - Display correct results when reporting which versions are
33697 recommended, and how recommended they are. (Resolves bug 383.)
33698 - Improve our estimates for directory bandwidth to be less random:
33699 guess that an unrecognized directory will have the average bandwidth
33700 from all known directories, not that it will have the average
33701 bandwidth from those directories earlier than it on the list.
33702 - If we start a server with ClientOnly 1, then set ClientOnly to 0
33703 and hup, stop triggering an assert based on an empty onion_key.
33704 - On platforms with no working mmap() equivalent, don't warn the
33705 user when cached-routers doesn't exist.
33706 - Warn the user when mmap() [or its equivalent] fails for some reason
33707 other than file-not-found.
33708 - Don't warn the user when cached-routers.new doesn't exist: that's
33709 perfectly fine when starting up for the first time.
33710 - When EntryNodes are configured, rebuild the guard list to contain,
33711 in order: the EntryNodes that were guards before; the rest of the
33712 EntryNodes; the nodes that were guards before.
33713 - Mask out all signals in sub-threads; only the libevent signal
33714 handler should be processing them. This should prevent some crashes
33715 on some machines using pthreads. (Patch from coderman.)
33716 - Fix switched arguments on memset in the implementation of
33717 tor_munmap() for systems with no mmap() call.
33718 - When Tor receives a router descriptor that it asked for, but
33719 no longer wants (because it has received fresh networkstatuses
33720 in the meantime), do not warn the user. Cache the descriptor if
33721 we're a cache; drop it if we aren't.
33722 - Make earlier entry guards _really_ get retried when the network
33724 - On a malformed DNS reply, always give an error to the corresponding
33726 - Build with recent libevents on platforms that do not define the
33727 nonstandard types "u_int8_t" and friends.
33729 o Minor features (controller):
33730 - Warn the user when an application uses the obsolete binary v0
33731 control protocol. We're planning to remove support for it during
33732 the next development series, so it's good to give people some
33734 - Add STREAM_BW events to report per-entry-stream bandwidth
33735 use. (Patch from Robert Hogan.)
33736 - Rate-limit SIGNEWNYM signals in response to controllers that
33737 impolitely generate them for every single stream. (Patch from
33738 mwenge; closes bug 394.)
33739 - Make REMAP stream events have a SOURCE (cache or exit), and
33740 make them generated in every case where we get a successful
33741 connected or resolved cell.
33743 o Minor bugfixes (performance):
33744 - Call router_have_min_dir_info half as often. (This is showing up in
33745 some profiles, but not others.)
33746 - When using GCC, make log_debug never get called at all, and its
33747 arguments never get evaluated, when no debug logs are configured.
33748 (This is showing up in some profiles, but not others.)
33751 - Remove some never-implemented options. Mark PathlenCoinWeight as
33753 - Implement proposal 106: Stop requiring clients to have well-formed
33754 certificates; stop checking nicknames in certificates. (Clients
33755 have certificates so that they can look like Tor servers, but in
33756 the future we might want to allow them to look like regular TLS
33757 clients instead. Nicknames in certificates serve no purpose other
33758 than making our protocol easier to recognize on the wire.)
33759 - Revise messages on handshake failure again to be even more clear about
33760 which are incoming connections and which are outgoing.
33761 - Discard any v1 directory info that's over 1 month old (for
33762 directories) or over 1 week old (for running-routers lists).
33763 - Do not warn when individual nodes in the configuration's EntryNodes,
33764 ExitNodes, etc are down: warn only when all possible nodes
33765 are down. (Fixes bug 348.)
33766 - Always remove expired routers and networkstatus docs before checking
33767 whether we have enough information to build circuits. (Fixes
33769 - Put a lower-bound on MaxAdvertisedBandwidth.
33772 Changes in version 0.1.2.7-alpha - 2007-02-06
33773 o Major bugfixes (rate limiting):
33774 - Servers decline directory requests much more aggressively when
33775 they're low on bandwidth. Otherwise they end up queueing more and
33776 more directory responses, which can't be good for latency.
33777 - But never refuse directory requests from local addresses.
33778 - Fix a memory leak when sending a 503 response for a networkstatus
33780 - Be willing to read or write on local connections (e.g. controller
33781 connections) even when the global rate limiting buckets are empty.
33782 - If our system clock jumps back in time, don't publish a negative
33783 uptime in the descriptor. Also, don't let the global rate limiting
33784 buckets go absurdly negative.
33785 - Flush local controller connection buffers periodically as we're
33786 writing to them, so we avoid queueing 4+ megabytes of data before
33789 o Major bugfixes (NT services):
33790 - Install as NT_AUTHORITY\LocalService rather than as SYSTEM; add a
33791 command-line flag so that admins can override the default by saying
33792 "tor --service install --user "SomeUser"". This will not affect
33793 existing installed services. Also, warn the user that the service
33794 will look for its configuration file in the service user's
33795 %appdata% directory. (We can't do the 'hardwire the user's appdata
33796 directory' trick any more, since we may not have read access to that
33799 o Major bugfixes (other):
33800 - Previously, we would cache up to 16 old networkstatus documents
33801 indefinitely, if they came from nontrusted authorities. Now we
33802 discard them if they are more than 10 days old.
33803 - Fix a crash bug in the presence of DNS hijacking (reported by Andrew
33805 - Detect and reject malformed DNS responses containing circular
33807 - If exits are rare enough that we're not marking exits as guards,
33808 ignore exit bandwidth when we're deciding the required bandwidth
33810 - When we're handling a directory connection tunneled over Tor,
33811 don't fill up internal memory buffers with all the data we want
33812 to tunnel; instead, only add it if the OR connection that will
33813 eventually receive it has some room for it. (This can lead to
33814 slowdowns in tunneled dir connections; a better solution will have
33815 to wait for 0.2.0.)
33817 o Minor bugfixes (dns):
33818 - Add some defensive programming to eventdns.c in an attempt to catch
33819 possible memory-stomping bugs.
33820 - Detect and reject DNS replies containing IPv4 or IPv6 records with
33821 an incorrect number of bytes. (Previously, we would ignore the
33823 - Fix as-yet-unused reverse IPv6 lookup code so it sends nybbles
33824 in the correct order, and doesn't crash.
33825 - Free memory held in recently-completed DNS lookup attempts on exit.
33826 This was not a memory leak, but may have been hiding memory leaks.
33827 - Handle TTL values correctly on reverse DNS lookups.
33828 - Treat failure to parse resolv.conf as an error.
33830 o Minor bugfixes (other):
33831 - Fix crash with "tor --list-fingerprint" (reported by seeess).
33832 - When computing clock skew from directory HTTP headers, consider what
33833 time it was when we finished asking for the directory, not what
33835 - Expire socks connections if they spend too long waiting for the
33836 handshake to finish. Previously we would let them sit around for
33837 days, if the connecting application didn't close them either.
33838 - And if the socks handshake hasn't started, don't send a
33839 "DNS resolve socks failed" handshake reply; just close it.
33840 - Stop using C functions that OpenBSD's linker doesn't like.
33841 - Don't launch requests for descriptors unless we have networkstatuses
33842 from at least half of the authorities. This delays the first
33843 download slightly under pathological circumstances, but can prevent
33844 us from downloading a bunch of descriptors we don't need.
33845 - Do not log IPs with TLS failures for incoming TLS
33846 connections. (Fixes bug 382.)
33847 - If the user asks to use invalid exit nodes, be willing to use
33849 - Stop using the reserved ac_cv namespace in our configure script.
33850 - Call stat() slightly less often; use fstat() when possible.
33851 - Refactor the way we handle pending circuits when an OR connection
33852 completes or fails, in an attempt to fix a rare crash bug.
33853 - Only rewrite a conn's address based on X-Forwarded-For: headers
33854 if it's a parseable public IP address; and stop adding extra quotes
33855 to the resulting address.
33858 - Weight directory requests by advertised bandwidth. Now we can
33859 let servers enable write limiting but still allow most clients to
33860 succeed at their directory requests. (We still ignore weights when
33861 choosing a directory authority; I hope this is a feature.)
33864 - Create a new file ReleaseNotes which was the old ChangeLog. The
33865 new ChangeLog file now includes the summaries for all development
33867 - Check for addresses with invalid characters at the exit as well
33868 as at the client, and warn less verbosely when they fail. You can
33869 override this by setting ServerDNSAllowNonRFC953Addresses to 1.
33870 - Adapt a patch from goodell to let the contrib/exitlist script
33871 take arguments rather than require direct editing.
33872 - Inform the server operator when we decide not to advertise a
33873 DirPort due to AccountingMax enabled or a low BandwidthRate. It
33874 was confusing Zax, so now we're hopefully more helpful.
33875 - Bring us one step closer to being able to establish an encrypted
33876 directory tunnel without knowing a descriptor first. Still not
33877 ready yet. As part of the change, now assume we can use a
33878 create_fast cell if we don't know anything about a router.
33879 - Allow exit nodes to use nameservers running on ports other than 53.
33880 - Servers now cache reverse DNS replies.
33881 - Add an --ignore-missing-torrc command-line option so that we can
33882 get the "use sensible defaults if the configuration file doesn't
33883 exist" behavior even when specifying a torrc location on the command
33886 o Minor features (controller):
33887 - Track reasons for OR connection failure; make these reasons
33888 available via the controller interface. (Patch from Mike Perry.)
33889 - Add a SOCKS_BAD_HOSTNAME client status event so controllers
33890 can learn when clients are sending malformed hostnames to Tor.
33891 - Clean up documentation for controller status events.
33892 - Add a REMAP status to stream events to note that a stream's
33893 address has changed because of a cached address or a MapAddress
33897 Changes in version 0.1.2.6-alpha - 2007-01-09
33899 - Fix an assert error introduced in 0.1.2.5-alpha: if a single TLS
33900 connection handles more than 4 gigs in either direction, we crash.
33901 - Fix an assert error introduced in 0.1.2.5-alpha: if we're an
33902 advertised exit node, somebody might try to exit from us when
33903 we're bootstrapping and before we've built our descriptor yet.
33904 Refuse the connection rather than crashing.
33907 - Warn if we (as a server) find that we've resolved an address that we
33908 weren't planning to resolve.
33909 - Warn that using select() on any libevent version before 1.1 will be
33910 unnecessarily slow (even for select()).
33911 - Flush ERR-level controller status events just like we currently
33912 flush ERR-level log events, so that a Tor shutdown doesn't prevent
33913 the controller from learning about current events.
33915 o Minor features (more controller status events):
33916 - Implement EXTERNAL_ADDRESS server status event so controllers can
33917 learn when our address changes.
33918 - Implement BAD_SERVER_DESCRIPTOR server status event so controllers
33919 can learn when directories reject our descriptor.
33920 - Implement SOCKS_UNKNOWN_PROTOCOL client status event so controllers
33921 can learn when a client application is speaking a non-socks protocol
33923 - Implement DANGEROUS_SOCKS client status event so controllers
33924 can learn when a client application is leaking DNS addresses.
33925 - Implement BUG general status event so controllers can learn when
33926 Tor is unhappy about its internal invariants.
33927 - Implement CLOCK_SKEW general status event so controllers can learn
33928 when Tor thinks the system clock is set incorrectly.
33929 - Implement GOOD_SERVER_DESCRIPTOR and ACCEPTED_SERVER_DESCRIPTOR
33930 server status events so controllers can learn when their descriptors
33931 are accepted by a directory.
33932 - Implement CHECKING_REACHABILITY and REACHABILITY_{SUCCEEDED|FAILED}
33933 server status events so controllers can learn about Tor's progress in
33934 deciding whether it's reachable from the outside.
33935 - Implement BAD_LIBEVENT general status event so controllers can learn
33936 when we have a version/method combination in libevent that needs to
33938 - Implement NAMESERVER_STATUS, NAMESERVER_ALL_DOWN, DNS_HIJACKED,
33939 and DNS_USELESS server status events so controllers can learn
33940 about changes to DNS server status.
33942 o Minor features (directory):
33943 - Authorities no longer recommend exits as guards if this would shift
33944 too much load to the exit nodes.
33947 Changes in version 0.1.2.5-alpha - 2007-01-06
33949 - Enable write limiting as well as read limiting. Now we sacrifice
33950 capacity if we're pushing out lots of directory traffic, rather
33951 than overrunning the user's intended bandwidth limits.
33952 - Include TLS overhead when counting bandwidth usage; previously, we
33953 would count only the bytes sent over TLS, but not the bytes used
33955 - Support running the Tor service with a torrc not in the same
33956 directory as tor.exe and default to using the torrc located in
33957 the %appdata%\Tor\ of the user who installed the service. Patch
33959 - Servers now check for the case when common DNS requests are going to
33960 wildcarded addresses (i.e. all getting the same answer), and change
33961 their exit policy to reject *:* if it's happening.
33962 - Implement BEGIN_DIR cells, so we can connect to the directory
33963 server via TLS to do encrypted directory requests rather than
33964 plaintext. Enable via the TunnelDirConns and PreferTunneledDirConns
33965 config options if you like.
33967 o Minor features (config and docs):
33968 - Start using the state file to store bandwidth accounting data:
33969 the bw_accounting file is now obsolete. We'll keep generating it
33970 for a while for people who are still using 0.1.2.4-alpha.
33971 - Try to batch changes to the state file so that we do as few
33972 disk writes as possible while still storing important things in
33974 - The state file and the bw_accounting file get saved less often when
33975 the AvoidDiskWrites config option is set.
33976 - Make PIDFile work on Windows (untested).
33977 - Add internal descriptions for a bunch of configuration options:
33978 accessible via controller interface and in comments in saved
33980 - Reject *:563 (NNTPS) in the default exit policy. We already reject
33981 NNTP by default, so this seems like a sensible addition.
33982 - Clients now reject hostnames with invalid characters. This should
33983 avoid some inadvertent info leaks. Add an option
33984 AllowNonRFC953Hostnames to disable this behavior, in case somebody
33985 is running a private network with hosts called @, !, and #.
33986 - Add a maintainer script to tell us which options are missing
33987 documentation: "make check-docs".
33988 - Add a new address-spec.txt document to describe our special-case
33989 addresses: .exit, .onion, and .noconnnect.
33991 o Minor features (DNS):
33992 - Ongoing work on eventdns infrastructure: now it has dns server
33993 and ipv6 support. One day Tor will make use of it.
33994 - Add client-side caching for reverse DNS lookups.
33995 - Add support to tor-resolve tool for reverse lookups and SOCKS5.
33996 - When we change nameservers or IP addresses, reset and re-launch
33997 our tests for DNS hijacking.
33999 o Minor features (directory):
34000 - Authorities now specify server versions in networkstatus. This adds
34001 about 2% to the size of compressed networkstatus docs, and allows
34002 clients to tell which servers support BEGIN_DIR and which don't.
34003 The implementation is forward-compatible with a proposed future
34004 protocol version scheme not tied to Tor versions.
34005 - DirServer configuration lines now have an orport= option so
34006 clients can open encrypted tunnels to the authorities without
34007 having downloaded their descriptors yet. Enabled for moria1,
34008 moria2, tor26, and lefkada now in the default configuration.
34009 - Directory servers are more willing to send a 503 "busy" if they
34010 are near their write limit, especially for v1 directory requests.
34011 Now they can use their limited bandwidth for actual Tor traffic.
34012 - Clients track responses with status 503 from dirservers. After a
34013 dirserver has given us a 503, we try not to use it until an hour has
34014 gone by, or until we have no dirservers that haven't given us a 503.
34015 - When we get a 503 from a directory, and we're not a server, we don't
34016 count the failure against the total number of failures allowed
34017 for the thing we're trying to download.
34018 - Report X-Your-Address-Is correctly from tunneled directory
34019 connections; don't report X-Your-Address-Is when it's an internal
34020 address; and never believe reported remote addresses when they're
34022 - Protect against an unlikely DoS attack on directory servers.
34023 - Add a BadDirectory flag to network status docs so that authorities
34024 can (eventually) tell clients about caches they believe to be
34027 o Minor features (controller):
34028 - Have GETINFO dir/status/* work on hosts with DirPort disabled.
34029 - Reimplement GETINFO so that info/names stays in sync with the
34031 - Implement "GETINFO fingerprint".
34032 - Implement "SETEVENTS GUARD" so controllers can get updates on
34033 entry guard status as it changes.
34035 o Minor features (clean up obsolete pieces):
34036 - Remove some options that have been deprecated since at least
34037 0.1.0.x: AccountingMaxKB, LogFile, DebugLogFile, LogLevel, and
34038 SysLog. Use AccountingMax instead of AccountingMaxKB, and use Log
34039 to set log options.
34040 - We no longer look for identity and onion keys in "identity.key" and
34041 "onion.key" -- these were replaced by secret_id_key and
34042 secret_onion_key in 0.0.8pre1.
34043 - We no longer require unrecognized directory entries to be
34046 o Major bugfixes (security):
34047 - Stop sending the HttpProxyAuthenticator string to directory
34048 servers when directory connections are tunnelled through Tor.
34049 - Clients no longer store bandwidth history in the state file.
34050 - Do not log introduction points for hidden services if SafeLogging
34052 - When generating bandwidth history, round down to the nearest
34053 1k. When storing accounting data, round up to the nearest 1k.
34054 - When we're running as a server, remember when we last rotated onion
34055 keys, so that we will rotate keys once they're a week old even if
34056 we never stay up for a week ourselves.
34058 o Major bugfixes (other):
34059 - Fix a longstanding bug in eventdns that prevented the count of
34060 timed-out resolves from ever being reset. This bug caused us to
34061 give up on a nameserver the third time it timed out, and try it
34062 10 seconds later... and to give up on it every time it timed out
34064 - Take out the '5 second' timeout from the connection retry
34065 schedule. Now the first connect attempt will wait a full 10
34066 seconds before switching to a new circuit. Perhaps this will help
34067 a lot. Based on observations from Mike Perry.
34068 - Fix a bug on the Windows implementation of tor_mmap_file() that
34069 would prevent the cached-routers file from ever loading. Reported
34073 - Fix an assert failure when a directory authority sets
34074 AuthDirRejectUnlisted and then receives a descriptor from an
34075 unlisted router. Reported by seeess.
34076 - Avoid a double-free when parsing malformed DirServer lines.
34077 - Fix a bug when a BSD-style PF socket is first used. Patch from
34079 - Fix a bug in 0.1.2.2-alpha that prevented clients from asking
34080 to resolve an address at a given exit node even when they ask for
34082 - Servers no longer ever list themselves in their "family" line,
34083 even if configured to do so. This makes it easier to configure
34084 family lists conveniently.
34085 - When running as a server, don't fall back to 127.0.0.1 when no
34086 nameservers are configured in /etc/resolv.conf; instead, make the
34087 user fix resolv.conf or specify nameservers explicitly. (Resolves
34089 - Stop accepting certain malformed ports in configured exit policies.
34090 - Don't re-write the fingerprint file every restart, unless it has
34092 - Stop warning when a single nameserver fails: only warn when _all_ of
34093 our nameservers have failed. Also, when we only have one nameserver,
34094 raise the threshold for deciding that the nameserver is dead.
34095 - Directory authorities now only decide that routers are reachable
34096 if their identity keys are as expected.
34097 - When the user uses bad syntax in the Log config line, stop
34098 suggesting other bad syntax as a replacement.
34099 - Correctly detect ipv6 DNS capability on OpenBSD.
34101 o Minor bugfixes (controller):
34102 - Report the circuit number correctly in STREAM CLOSED events. Bug
34103 reported by Mike Perry.
34104 - Do not report bizarre values for results of accounting GETINFOs
34105 when the last second's write or read exceeds the allotted bandwidth.
34106 - Report "unrecognized key" rather than an empty string when the
34107 controller tries to fetch a networkstatus that doesn't exist.
34110 Changes in version 0.1.1.26 - 2006-12-14
34111 o Security bugfixes:
34112 - Stop sending the HttpProxyAuthenticator string to directory
34113 servers when directory connections are tunnelled through Tor.
34114 - Clients no longer store bandwidth history in the state file.
34115 - Do not log introduction points for hidden services if SafeLogging
34119 - Fix an assert failure when a directory authority sets
34120 AuthDirRejectUnlisted and then receives a descriptor from an
34121 unlisted router (reported by seeess).
34124 Changes in version 0.1.2.4-alpha - 2006-12-03
34126 - Add support for using natd; this allows FreeBSDs earlier than
34127 5.1.2 to have ipfw send connections through Tor without using
34128 SOCKS. (Patch from Zajcev Evgeny with tweaks from tup.)
34131 - Make all connections to addresses of the form ".noconnect"
34132 immediately get closed. This lets application/controller combos
34133 successfully test whether they're talking to the same Tor by
34134 watching for STREAM events.
34135 - Make cross.sh cross-compilation script work even when autogen.sh
34136 hasn't been run. (Patch from Michael Mohr.)
34137 - Statistics dumped by -USR2 now include a breakdown of public key
34138 operations, for profiling.
34141 - Fix a major leak when directory authorities parse their
34142 approved-routers list, a minor memory leak when we fail to pick
34143 an exit node, and a few rare leaks on errors.
34144 - Handle TransPort connections even when the server sends data before
34145 the client sends data. Previously, the connection would just hang
34146 until the client sent data. (Patch from tup based on patch from
34148 - Avoid assert failure when our cached-routers file is empty on
34152 - Don't log spurious warnings when we see a circuit close reason we
34153 don't recognize; it's probably just from a newer version of Tor.
34154 - Have directory authorities allow larger amounts of drift in uptime
34155 without replacing the server descriptor: previously, a server that
34156 restarted every 30 minutes could have 48 "interesting" descriptors
34158 - Start linking to the Tor specification and Tor reference manual
34159 correctly in the Windows installer.
34160 - Add Vidalia to the OS X uninstaller script, so when we uninstall
34161 Tor/Privoxy we also uninstall Vidalia.
34162 - Resume building on Irix64, and fix a lot of warnings from its
34163 MIPSpro C compiler.
34164 - Don't corrupt last_guessed_ip in router_new_address_suggestion()
34165 when we're running as a client.
34168 Changes in version 0.1.1.25 - 2006-11-04
34170 - When a client asks us to resolve (rather than connect to)
34171 an address, and we have a cached answer, give them the cached
34172 answer. Previously, we would give them no answer at all.
34173 - We were building exactly the wrong circuits when we predict
34174 hidden service requirements, meaning Tor would have to build all
34175 its circuits on demand.
34176 - If none of our live entry guards have a high uptime, but we
34177 require a guard with a high uptime, try adding a new guard before
34178 we give up on the requirement. This patch should make long-lived
34179 connections more stable on average.
34180 - When testing reachability of our DirPort, don't launch new
34181 tests when there's already one in progress -- unreachable
34182 servers were stacking up dozens of testing streams.
34184 o Security bugfixes:
34185 - When the user sends a NEWNYM signal, clear the client-side DNS
34186 cache too. Otherwise we continue to act on previous information.
34189 - Avoid a memory corruption bug when creating a hash table for
34191 - Avoid possibility of controller-triggered crash when misusing
34192 certain commands from a v0 controller on platforms that do not
34193 handle printf("%s",NULL) gracefully.
34194 - Avoid infinite loop on unexpected controller input.
34195 - Don't log spurious warnings when we see a circuit close reason we
34196 don't recognize; it's probably just from a newer version of Tor.
34197 - Add Vidalia to the OS X uninstaller script, so when we uninstall
34198 Tor/Privoxy we also uninstall Vidalia.
34201 Changes in version 0.1.2.3-alpha - 2006-10-29
34203 - Prepare for servers to publish descriptors less often: never
34204 discard a descriptor simply for being too old until either it is
34205 recommended by no authorities, or until we get a better one for
34206 the same router. Make caches consider retaining old recommended
34207 routers for even longer.
34208 - If most authorities set a BadExit flag for a server, clients
34209 don't think of it as a general-purpose exit. Clients only consider
34210 authorities that advertise themselves as listing bad exits.
34211 - Directory servers now provide 'Pragma: no-cache' and 'Expires'
34212 headers for content, so that we can work better in the presence of
34213 caching HTTP proxies.
34214 - Allow authorities to list nodes as bad exits by fingerprint or by
34217 o Minor features, controller:
34218 - Add a REASON field to CIRC events; for backward compatibility, this
34219 field is sent only to controllers that have enabled the extended
34220 event format. Also, add additional reason codes to explain why
34221 a given circuit has been destroyed or truncated. (Patches from
34223 - Add a REMOTE_REASON field to extended CIRC events to tell the
34224 controller about why a remote OR told us to close a circuit.
34225 - Stream events also now have REASON and REMOTE_REASON fields,
34226 working much like those for circuit events.
34227 - There's now a GETINFO ns/... field so that controllers can ask Tor
34228 about the current status of a router.
34229 - A new event type "NS" to inform a controller when our opinion of
34230 a router's status has changed.
34231 - Add a GETINFO events/names and GETINFO features/names so controllers
34232 can tell which events and features are supported.
34233 - A new CLEARDNSCACHE signal to allow controllers to clear the
34234 client-side DNS cache without expiring circuits.
34236 o Security bugfixes:
34237 - When the user sends a NEWNYM signal, clear the client-side DNS
34238 cache too. Otherwise we continue to act on previous information.
34241 - Avoid sending junk to controllers or segfaulting when a controller
34242 uses EVENT_NEW_DESC with verbose nicknames.
34243 - Stop triggering asserts if the controller tries to extend hidden
34244 service circuits (reported by mwenge).
34245 - Avoid infinite loop on unexpected controller input.
34246 - When the controller does a "GETINFO network-status", tell it
34247 about even those routers whose descriptors are very old, and use
34248 long nicknames where appropriate.
34249 - Change NT service functions to be loaded on demand. This lets us
34250 build with MinGW without breaking Tor for Windows 98 users.
34251 - Do DirPort reachability tests less often, since a single test
34252 chews through many circuits before giving up.
34253 - In the hidden service example in torrc.sample, stop recommending
34254 esoteric and discouraged hidden service options.
34255 - When stopping an NT service, wait up to 10 sec for it to actually
34256 stop. Patch from Matt Edman; resolves bug 295.
34257 - Fix handling of verbose nicknames with ORCONN controller events:
34258 make them show up exactly when requested, rather than exactly when
34260 - When reporting verbose nicknames in entry_guards_getinfo(), avoid
34261 printing a duplicate "$" in the keys we send (reported by mwenge).
34262 - Correctly set maximum connection limit on Cygwin. (This time
34264 - Try to detect Windows correctly when cross-compiling.
34265 - Detect the size of the routers file correctly even if it is
34266 corrupted (on systems without mmap) or not page-aligned (on systems
34267 with mmap). This bug was harmless.
34268 - Sometimes we didn't bother sending a RELAY_END cell when an attempt
34269 to open a stream fails; now we do in more cases. This should
34270 make clients able to find a good exit faster in some cases, since
34271 unhandleable requests will now get an error rather than timing out.
34272 - Resolve two memory leaks when rebuilding the on-disk router cache
34273 (reported by fookoowa).
34274 - Clean up minor code warnings suggested by the MIPSpro C compiler,
34275 and reported by some Centos users.
34276 - Controller signals now work on non-Unix platforms that don't define
34277 SIGUSR1 and SIGUSR2 the way we expect.
34278 - Patch from Michael Mohr to contrib/cross.sh, so it checks more
34279 values before failing, and always enables eventdns.
34280 - Libevent-1.2 exports, but does not define in its headers, strlcpy.
34281 Try to fix this in configure.in by checking for most functions
34282 before we check for libevent.
34285 Changes in version 0.1.2.2-alpha - 2006-10-07
34287 - Make our async eventdns library on-by-default for Tor servers,
34288 and plan to deprecate the separate dnsworker threads.
34289 - Add server-side support for "reverse" DNS lookups (using PTR
34290 records so clients can determine the canonical hostname for a given
34291 IPv4 address). Only supported by servers using eventdns; servers
34292 now announce in their descriptors whether they support eventdns.
34293 - Specify and implement client-side SOCKS5 interface for reverse DNS
34294 lookups (see doc/socks-extensions.txt).
34295 - Add a BEGIN_DIR relay cell type for an easier in-protocol way to
34296 connect to directory servers through Tor. Previously, clients needed
34297 to find Tor exits to make private connections to directory servers.
34298 - Avoid choosing Exit nodes for entry or middle hops when the
34299 total bandwidth available from non-Exit nodes is much higher than
34300 the total bandwidth available from Exit nodes.
34301 - Workaround for name servers (like Earthlink's) that hijack failing
34302 DNS requests and replace the no-such-server answer with a "helpful"
34303 redirect to an advertising-driven search portal. Also work around
34304 DNS hijackers who "helpfully" decline to hijack known-invalid
34305 RFC2606 addresses. Config option "ServerDNSDetectHijacking 0"
34306 lets you turn it off.
34307 - Send out a burst of long-range padding cells once we've established
34308 that we're reachable. Spread them over 4 circuits, so hopefully
34309 a few will be fast. This exercises our bandwidth and bootstraps
34310 us into the directory more quickly.
34312 o New/improved config options:
34313 - Add new config option "ResolvConf" to let the server operator
34314 choose an alternate resolve.conf file when using eventdns.
34315 - Add an "EnforceDistinctSubnets" option to control our "exclude
34316 servers on the same /16" behavior. It's still on by default; this
34317 is mostly for people who want to operate private test networks with
34318 all the machines on the same subnet.
34319 - If one of our entry guards is on the ExcludeNodes list, or the
34320 directory authorities don't think it's a good guard, treat it as
34321 if it were unlisted: stop using it as a guard, and throw it off
34322 the guards list if it stays that way for a long time.
34323 - Allow directory authorities to be marked separately as authorities
34324 for the v1 directory protocol, the v2 directory protocol, and
34325 as hidden service directories, to make it easier to retire old
34326 authorities. V1 authorities should set "HSAuthoritativeDir 1"
34327 to continue being hidden service authorities too.
34328 - Remove 8888 as a LongLivedPort, and add 6697 (IRCS).
34330 o Minor features, controller:
34331 - Fix CIRC controller events so that controllers can learn the
34332 identity digests of non-Named servers used in circuit paths.
34333 - Let controllers ask for more useful identifiers for servers. Instead
34334 of learning identity digests for un-Named servers and nicknames
34335 for Named servers, the new identifiers include digest, nickname,
34336 and indication of Named status. Off by default; see control-spec.txt
34337 for more information.
34338 - Add a "getinfo address" controller command so it can display Tor's
34339 best guess to the user.
34340 - New controller event to alert the controller when our server
34341 descriptor has changed.
34342 - Give more meaningful errors on controller authentication failure.
34344 o Minor features, other:
34345 - When asked to resolve a hostname, don't use non-exit servers unless
34346 requested to do so. This allows servers with broken DNS to be
34347 useful to the network.
34348 - Divide eventdns log messages into warn and info messages.
34349 - Reserve the nickname "Unnamed" for routers that can't pick
34350 a hostname: any router can call itself Unnamed; directory
34351 authorities will never allocate Unnamed to any particular router;
34352 clients won't believe that any router is the canonical Unnamed.
34353 - Only include function names in log messages for info/debug messages.
34354 For notice/warn/err, the content of the message should be clear on
34355 its own, and printing the function name only confuses users.
34356 - Avoid some false positives during reachability testing: don't try
34357 to test via a server that's on the same /24 as us.
34358 - If we fail to build a circuit to an intended enclave, and it's
34359 not mandatory that we use that enclave, stop wanting it.
34360 - When eventdns is enabled, allow multithreaded builds on NetBSD and
34361 OpenBSD. (We had previously disabled threads on these platforms
34362 because they didn't have working thread-safe resolver functions.)
34364 o Major bugfixes, anonymity/security:
34365 - If a client asked for a server by name, and there's a named server
34366 in our network-status but we don't have its descriptor yet, we
34367 could return an unnamed server instead.
34368 - Fix NetBSD bug that could allow someone to force uninitialized RAM
34369 to be sent to a server's DNS resolver. This only affects NetBSD
34370 and other platforms that do not bounds-check tolower().
34371 - Reject (most) attempts to use Tor circuits with length one. (If
34372 many people start using Tor as a one-hop proxy, exit nodes become
34373 a more attractive target for compromise.)
34374 - Just because your DirPort is open doesn't mean people should be
34375 able to remotely teach you about hidden service descriptors. Now
34376 only accept rendezvous posts if you've got HSAuthoritativeDir set.
34378 o Major bugfixes, other:
34379 - Don't crash on race condition in dns.c: tor_assert(!resolve->expire)
34380 - When a client asks the server to resolve (not connect to)
34381 an address, and it has a cached answer, give them the cached answer.
34382 Previously, the server would give them no answer at all.
34383 - Allow really slow clients to not hang up five minutes into their
34384 directory downloads (suggested by Adam J. Richter).
34385 - We were building exactly the wrong circuits when we anticipated
34386 hidden service requirements, meaning Tor would have to build all
34387 its circuits on demand.
34388 - Avoid crashing when we mmap a router cache file of size 0.
34389 - When testing reachability of our DirPort, don't launch new
34390 tests when there's already one in progress -- unreachable
34391 servers were stacking up dozens of testing streams.
34393 o Minor bugfixes, correctness:
34394 - If we're a directory mirror and we ask for "all" network status
34395 documents, we would discard status documents from authorities
34396 we don't recognize.
34397 - Avoid a memory corruption bug when creating a hash table for
34399 - Avoid controller-triggered crash when misusing certain commands
34400 from a v0 controller on platforms that do not handle
34401 printf("%s",NULL) gracefully.
34402 - Don't crash when a controller sends a third argument to an
34403 "extendcircuit" request.
34404 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
34405 response; fix error code when "getinfo dir/status/" fails.
34406 - Avoid crash when telling controller stream-status and a stream
34408 - Patch from Adam Langley to fix assert() in eventdns.c.
34409 - Fix a debug log message in eventdns to say "X resolved to Y"
34410 instead of "X resolved to X".
34411 - Make eventdns give strings for DNS errors, not just error numbers.
34412 - Track unreachable entry guards correctly: don't conflate
34413 'unreachable by us right now' with 'listed as down by the directory
34414 authorities'. With the old code, if a guard was unreachable by
34415 us but listed as running, it would clog our guard list forever.
34416 - Behave correctly in case we ever have a network with more than
34417 2GB/s total advertised capacity.
34418 - Make TrackExitHosts case-insensitive, and fix the behavior of
34419 ".suffix" TrackExitHosts items to avoid matching in the middle of
34421 - Finally fix the openssl warnings from newer gccs that believe that
34422 ignoring a return value is okay, but casting a return value and
34423 then ignoring it is a sign of madness.
34424 - Prevent the contrib/exitlist script from printing the same
34425 result more than once.
34426 - Patch from Steve Hildrey: Generate network status correctly on
34427 non-versioning dirservers.
34428 - Don't listen to the X-Your-Address-Is hint if you did the lookup
34429 via Tor; otherwise you'll think you're the exit node's IP address.
34431 o Minor bugfixes, performance:
34432 - Two small performance improvements on parsing descriptors.
34433 - Major performance improvement on inserting descriptors: change
34434 algorithm from O(n^2) to O(n).
34435 - Make the common memory allocation path faster on machines where
34436 malloc(0) returns a pointer.
34437 - Start remembering X-Your-Address-Is directory hints even if you're
34438 a client, so you can become a server more smoothly.
34439 - Avoid duplicate entries on MyFamily line in server descriptor.
34441 o Packaging, features:
34442 - Remove architecture from OS X builds. The official builds are
34443 now universal binaries.
34444 - The Debian package now uses --verify-config when (re)starting,
34445 to distinguish configuration errors from other errors.
34446 - Update RPMs to require libevent 1.1b.
34448 o Packaging, bugfixes:
34449 - Patches so Tor builds with MinGW on Windows.
34450 - Patches so Tor might run on Cygwin again.
34451 - Resume building on non-gcc compilers and ancient gcc. Resume
34452 building with the -O0 compile flag. Resume building cleanly on
34454 - Run correctly on OS X platforms with case-sensitive filesystems.
34455 - Correct includes for net/if.h and net/pfvar.h on OpenBSD (from Tup).
34456 - Add autoconf checks so Tor can build on Solaris x86 again.
34459 - Documented (and renamed) ServerDNSSearchDomains and
34460 ServerDNSResolvConfFile options.
34461 - Be clearer that the *ListenAddress directives can be repeated
34465 Changes in version 0.1.1.24 - 2006-09-29
34467 - Allow really slow clients to not hang up five minutes into their
34468 directory downloads (suggested by Adam J. Richter).
34469 - Fix major performance regression from 0.1.0.x: instead of checking
34470 whether we have enough directory information every time we want to
34471 do something, only check when the directory information has changed.
34472 This should improve client CPU usage by 25-50%.
34473 - Don't crash if, after a server has been running for a while,
34474 it can't resolve its hostname.
34477 - Allow Tor to start when RunAsDaemon is set but no logs are set.
34478 - Don't crash when the controller receives a third argument to an
34479 "extendcircuit" request.
34480 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
34481 response; fix error code when "getinfo dir/status/" fails.
34482 - Fix configure.in to not produce broken configure files with
34483 more recent versions of autoconf. Thanks to Clint for his auto*
34485 - Fix security bug on NetBSD that could allow someone to force
34486 uninitialized RAM to be sent to a server's DNS resolver. This
34487 only affects NetBSD and other platforms that do not bounds-check
34489 - Warn user when using libevent 1.1a or earlier with win32 or kqueue
34490 methods: these are known to be buggy.
34491 - If we're a directory mirror and we ask for "all" network status
34492 documents, we would discard status documents from authorities
34493 we don't recognize.
34496 Changes in version 0.1.2.1-alpha - 2006-08-27
34498 - Add "eventdns" async dns library from Adam Langley, tweaked to
34499 build on OSX and Windows. Only enabled if you pass the
34500 --enable-eventdns argument to configure.
34501 - Allow servers with no hostname or IP address to learn their
34502 IP address by asking the directory authorities. This code only
34503 kicks in when you would normally have exited with a "no address"
34504 error. Nothing's authenticated, so use with care.
34505 - Rather than waiting a fixed amount of time between retrying
34506 application connections, we wait only 5 seconds for the first,
34507 10 seconds for the second, and 15 seconds for each retry after
34508 that. Hopefully this will improve the expected user experience.
34509 - Patch from Tup to add support for transparent AP connections:
34510 this basically bundles the functionality of trans-proxy-tor
34511 into the Tor mainline. Now hosts with compliant pf/netfilter
34512 implementations can redirect TCP connections straight to Tor
34513 without diverting through SOCKS. Needs docs.
34514 - Busy directory servers save lots of memory by spooling server
34515 descriptors, v1 directories, and v2 networkstatus docs to buffers
34516 as needed rather than en masse. Also mmap the cached-routers
34517 files, so we don't need to keep the whole thing in memory too.
34518 - Automatically avoid picking more than one node from the same
34519 /16 network when constructing a circuit.
34520 - Revise and clean up the torrc.sample that we ship with; add
34521 a section for BandwidthRate and BandwidthBurst.
34524 - Split circuit_t into origin_circuit_t and or_circuit_t, and
34525 split connection_t into edge, or, dir, control, and base structs.
34526 These will save quite a bit of memory on busy servers, and they'll
34527 also help us track down bugs in the code and bugs in the spec.
34528 - Experimentally re-enable kqueue on OSX when using libevent 1.1b
34529 or later. Log when we are doing this, so we can diagnose it when
34530 it fails. (Also, recommend libevent 1.1b for kqueue and
34531 win32 methods; deprecate libevent 1.0b harder; make libevent
34532 recommendation system saner.)
34533 - Start being able to build universal binaries on OS X (thanks
34535 - Export the default exit policy via the control port, so controllers
34536 don't need to guess what it is / will be later.
34537 - Add a man page entry for ProtocolWarnings.
34538 - Add TestVia config option to the man page.
34539 - Remove even more protocol-related warnings from Tor server logs,
34540 such as bad TLS handshakes and malformed begin cells.
34541 - Stop fetching descriptors if you're not a dir mirror and you
34542 haven't tried to establish any circuits lately. [This currently
34543 causes some dangerous behavior, because when you start up again
34544 you'll use your ancient server descriptors.]
34545 - New DirPort behavior: if you have your dirport set, you download
34546 descriptors aggressively like a directory mirror, whether or not
34547 your ORPort is set.
34548 - Get rid of the router_retry_connections notion. Now routers
34549 no longer try to rebuild long-term connections to directory
34550 authorities, and directory authorities no longer try to rebuild
34551 long-term connections to all servers. We still don't hang up
34552 connections in these two cases though -- we need to look at it
34553 more carefully to avoid flapping, and we likely need to wait til
34554 0.1.1.x is obsolete.
34555 - Drop compatibility with obsolete Tors that permit create cells
34556 to have the wrong circ_id_type.
34557 - Re-enable per-connection rate limiting. Get rid of the "OP
34558 bandwidth" concept. Lay groundwork for "bandwidth classes" --
34559 separate global buckets that apply depending on what sort of conn
34561 - Start publishing one minute or so after we find our ORPort
34562 to be reachable. This will help reduce the number of descriptors
34563 we have for ourselves floating around, since it's quite likely
34564 other things (e.g. DirPort) will change during that minute too.
34565 - Fork the v1 directory protocol into its own spec document,
34566 and mark dir-spec.txt as the currently correct (v2) spec.
34569 - When we find our DirPort to be reachable, publish a new descriptor
34570 so we'll tell the world (reported by pnx).
34571 - Publish a new descriptor after we hup/reload. This is important
34572 if our config has changed such that we'll want to start advertising
34573 our DirPort now, etc.
34574 - Allow Tor to start when RunAsDaemon is set but no logs are set.
34575 - When we have a state file we cannot parse, tell the user and
34576 move it aside. Now we avoid situations where the user starts
34577 Tor in 1904, Tor writes a state file with that timestamp in it,
34578 the user fixes her clock, and Tor refuses to start.
34579 - Fix configure.in to not produce broken configure files with
34580 more recent versions of autoconf. Thanks to Clint for his auto*
34582 - "tor --verify-config" now exits with -1(255) or 0 depending on
34583 whether the config options are bad or good.
34584 - Resolve bug 321 when using dnsworkers: append a period to every
34585 address we resolve at the exit node, so that we do not accidentally
34586 pick up local addresses, and so that failing searches are retried
34587 in the resolver search domains. (This is already solved for
34588 eventdns.) (This breaks Blossom servers for now.)
34589 - If we are using an exit enclave and we can't connect, e.g. because
34590 its webserver is misconfigured to not listen on localhost, then
34591 back off and try connecting from somewhere else before we fail.
34594 - Start compiling on MinGW on Windows (patches from Mike Chiussi).
34595 - Start compiling on MSVC6 on Windows (patches from Frediano Ziglio).
34596 - Fix bug 314: Tor clients issued "unsafe socks" warnings even
34597 when the IP address is mapped through MapAddress to a hostname.
34598 - Start passing "ipv4" hints to getaddrinfo(), so servers don't do
34599 useless IPv6 DNS resolves.
34600 - Patch suggested by Karsten Loesing: respond to SIGNAL command
34601 before we execute the signal, in case the signal shuts us down.
34602 - Clean up AllowInvalidNodes man page entry.
34603 - Claim a commonname of Tor, rather than TOR, in TLS handshakes.
34604 - Add more asserts to track down an assert error on a windows Tor
34605 server with connection_add being called with socket == -1.
34606 - Handle reporting OR_CONN_EVENT_NEW events to the controller.
34607 - Fix misleading log messages: an entry guard that is "unlisted",
34608 as well as not known to be "down" (because we've never heard
34609 of it), is not therefore "up".
34610 - Remove code to special-case "-cvs" ending, since it has not
34611 actually mattered since 0.0.9.
34612 - Make our socks5 handling more robust to broken socks clients:
34613 throw out everything waiting on the buffer in between socks
34614 handshake phases, since they can't possibly (so the theory
34615 goes) have predicted what we plan to respond to them.
34618 Changes in version 0.1.1.23 - 2006-07-30
34620 - Fast Tor servers, especially exit nodes, were triggering asserts
34621 due to a bug in handling the list of pending DNS resolves. Some
34622 bugs still remain here; we're hunting them.
34623 - Entry guards could crash clients by sending unexpected input.
34624 - More fixes on reachability testing: if you find yourself reachable,
34625 then don't ever make any client requests (so you stop predicting
34626 circuits), then hup or have your clock jump, then later your IP
34627 changes, you won't think circuits are working, so you won't try to
34628 test reachability, so you won't publish.
34631 - Avoid a crash if the controller does a resetconf firewallports
34632 and then a setconf fascistfirewall=1.
34633 - Avoid an integer underflow when the dir authority decides whether
34634 a router is stable: we might wrongly label it stable, and compute
34635 a slightly wrong median stability, when a descriptor is published
34637 - Fix a place where we might trigger an assert if we can't build our
34638 own server descriptor yet.
34641 Changes in version 0.1.1.22 - 2006-07-05
34643 - Fix a big bug that was causing servers to not find themselves
34644 reachable if they changed IP addresses. Since only 0.1.1.22+
34645 servers can do reachability testing correctly, now we automatically
34646 make sure to test via one of these.
34647 - Fix to allow clients and mirrors to learn directory info from
34648 descriptor downloads that get cut off partway through.
34649 - Directory authorities had a bug in deciding if a newly published
34650 descriptor was novel enough to make everybody want a copy -- a few
34651 servers seem to be publishing new descriptors many times a minute.
34653 - Fix a rare bug that was causing some servers to complain about
34654 "closing wedged cpuworkers" and skip some circuit create requests.
34655 - Make the Exit flag in directory status documents actually work.
34658 Changes in version 0.1.1.21 - 2006-06-10
34659 o Crash and assert fixes from 0.1.1.20:
34660 - Fix a rare crash on Tor servers that have enabled hibernation.
34661 - Fix a seg fault on startup for Tor networks that use only one
34662 directory authority.
34663 - Fix an assert from a race condition that occurs on Tor servers
34664 while exiting, where various threads are trying to log that they're
34665 exiting, and delete the logs, at the same time.
34666 - Make our unit tests pass again on certain obscure platforms.
34669 - Add support for building SUSE RPM packages.
34670 - Speed up initial bootstrapping for clients: if we are making our
34671 first ever connection to any entry guard, then don't mark it down
34673 - When only one Tor server in the network is labelled as a guard,
34674 and we've already picked him, we would cycle endlessly picking him
34675 again, being unhappy about it, etc. Now we specifically exclude
34676 current guards when picking a new guard.
34677 - Servers send create cells more reliably after the TLS connection
34678 is established: we were sometimes forgetting to send half of them
34679 when we had more than one pending.
34680 - If we get a create cell that asks us to extend somewhere, but the
34681 Tor server there doesn't match the expected digest, we now send
34682 a destroy cell back, rather than silently doing nothing.
34683 - Make options->RedirectExit work again.
34684 - Make cookie authentication for the controller work again.
34685 - Stop being picky about unusual characters in the arguments to
34686 mapaddress. It's none of our business.
34687 - Add a new config option "TestVia" that lets you specify preferred
34688 middle hops to use for test circuits. Perhaps this will let me
34689 debug the reachability problems better.
34691 o Log / documentation fixes:
34692 - If we're a server and some peer has a broken TLS certificate, don't
34693 log about it unless ProtocolWarnings is set, i.e., we want to hear
34694 about protocol violations by others.
34695 - Fix spelling of VirtualAddrNetwork in man page.
34696 - Add a better explanation at the top of the autogenerated torrc file
34697 about what happened to our old torrc.
34700 Changes in version 0.1.1.20 - 2006-05-23
34702 - Downgrade a log severity where servers complain that they're
34704 - Avoid a compile warning on FreeBSD.
34705 - Remove string size limit on NEWDESC messages; solve bug 291.
34706 - Correct the RunAsDaemon entry in the man page; ignore RunAsDaemon
34707 more thoroughly when we're running on windows.
34710 Changes in version 0.1.1.19-rc - 2006-05-03
34712 - Regenerate our local descriptor if it's dirty and we try to use
34713 it locally (e.g. if it changes during reachability detection).
34714 - If we setconf our ORPort to 0, we continued to listen on the
34715 old ORPort and receive connections.
34716 - Avoid a second warning about machine/limits.h on Debian
34718 - Be willing to add our own routerinfo into the routerlist.
34719 Now authorities will include themselves in their directories
34720 and network-statuses.
34721 - Stop trying to upload rendezvous descriptors to every
34722 directory authority: only try the v1 authorities.
34723 - Servers no longer complain when they think they're not
34724 registered with the directory authorities. There were too many
34726 - Backport dist-rpm changes so rpms can be built without errors.
34729 - Implement an option, VirtualAddrMask, to set which addresses
34730 get handed out in response to mapaddress requests. This works
34731 around a bug in tsocks where 127.0.0.0/8 is never socksified.
34734 Changes in version 0.1.1.18-rc - 2006-04-10
34736 - Work harder to download live network-statuses from all the
34737 directory authorities we know about. Improve the threshold
34738 decision logic so we're more robust to edge cases.
34739 - When fetching rendezvous descriptors, we were willing to ask
34740 v2 authorities too, which would always return 404.
34743 - Stop listing down or invalid nodes in the v1 directory. This will
34744 reduce its bulk by about 1/3, and reduce load on directory
34746 - When deciding whether a router is Fast or Guard-worthy, consider
34747 his advertised BandwidthRate and not just the BandwidthCapacity.
34748 - No longer ship INSTALL and README files -- they are useless now.
34749 - Force rpmbuild to behave and honor target_cpu.
34750 - Avoid warnings about machine/limits.h on Debian GNU/kFreeBSD.
34751 - Start to include translated versions of the tor-doc-*.html
34752 files, along with the screenshots. Still needs more work.
34753 - Start sending back 512 and 451 errors if mapaddress fails,
34754 rather than not sending anything back at all.
34755 - When we fail to bind or listen on an incoming or outgoing
34756 socket, we should close it before failing. otherwise we just
34757 leak it. (thanks to weasel for finding.)
34758 - Allow "getinfo dir/status/foo" to work, as long as your DirPort
34759 is enabled. (This is a hack, and will be fixed in 0.1.2.x.)
34760 - Make NoPublish (even though deprecated) work again.
34761 - Fix a minor security flaw where a versioning auth dirserver
34762 could list a recommended version many times in a row to make
34763 clients more convinced that it's recommended.
34764 - Fix crash bug if there are two unregistered servers running
34765 with the same nickname, one of them is down, and you ask for
34766 them by nickname in your EntryNodes or ExitNodes. Also, try
34767 to pick the one that's running rather than an arbitrary one.
34768 - Fix an infinite loop we could hit if we go offline for too long.
34769 - Complain when we hit WSAENOBUFS on recv() or write() too.
34770 Perhaps this will help us hunt the bug.
34771 - If you're not a versioning dirserver, don't put the string
34772 "client-versions \nserver-versions \n" in your network-status.
34773 - Lower the minimum required number of file descriptors to 1000,
34774 so we can have some overhead for Valgrind on Linux, where the
34775 default ulimit -n is 1024.
34778 - Add tor.dizum.com as the fifth authoritative directory server.
34779 - Add a new config option FetchUselessDescriptors, off by default,
34780 for when you plan to run "exitlist" on your client and you want
34781 to know about even the non-running descriptors.
34784 Changes in version 0.1.1.17-rc - 2006-03-28
34786 - Clients and servers since 0.1.1.10-alpha have been expiring
34787 connections whenever they are idle for 5 minutes and they *do*
34788 have circuits on them. Oops. With this new version, clients will
34789 discard their previous entry guard choices and avoid choosing
34790 entry guards running these flawed versions.
34791 - Fix memory leak when uncompressing concatenated zlib streams. This
34792 was causing substantial leaks over time on Tor servers.
34793 - The v1 directory was including servers as much as 48 hours old,
34794 because that's how the new routerlist->routers works. Now only
34795 include them if they're 20 hours old or less.
34798 - Resume building on irix64, netbsd 2.0, etc.
34799 - On non-gcc compilers (e.g. solaris), use "-g -O" instead of
34801 - Stop writing the "router.desc" file, ever. Nothing uses it anymore,
34802 and it is confusing some users.
34803 - Mirrors stop caching the v1 directory so often.
34804 - Make the max number of old descriptors that a cache will hold
34805 rise with the number of directory authorities, so we can scale.
34806 - Change our win32 uname() hack to be more forgiving about what
34807 win32 versions it thinks it's found.
34810 - Add lefkada.eecs.harvard.edu as a fourth authoritative directory
34812 - When the controller's *setconf commands fail, collect an error
34813 message in a string and hand it back to the controller.
34814 - Make the v2 dir's "Fast" flag based on relative capacity, just
34815 like "Stable" is based on median uptime. Name everything in the
34816 top 7/8 Fast, and only the top 1/2 gets to be a Guard.
34817 - Log server fingerprint on startup, so new server operators don't
34818 have to go hunting around their filesystem for it.
34819 - Return a robots.txt on our dirport to discourage google indexing.
34820 - Let the controller ask for GETINFO dir/status/foo so it can ask
34821 directly rather than connecting to the dir port. Only works when
34822 dirport is set for now.
34824 o New config options rather than constants in the code:
34825 - SocksTimeout: How long do we let a socks connection wait
34826 unattached before we fail it?
34827 - CircuitBuildTimeout: Cull non-open circuits that were born
34828 at least this many seconds ago.
34829 - CircuitIdleTimeout: Cull open clean circuits that were born
34830 at least this many seconds ago.
34833 Changes in version 0.1.1.16-rc - 2006-03-18
34834 o Bugfixes on 0.1.1.15-rc:
34835 - Fix assert when the controller asks to attachstream a connect-wait
34836 or resolve-wait stream.
34837 - Now do address rewriting when the controller asks us to attach
34838 to a particular circuit too. This will let Blossom specify
34839 "moria2.exit" without having to learn what moria2's IP address is.
34840 - Make the "tor --verify-config" command-line work again, so people
34841 can automatically check if their torrc will parse.
34842 - Authoritative dirservers no longer require an open connection from
34843 a server to consider him "reachable". We need this change because
34844 when we add new auth dirservers, old servers won't know not to
34846 - Let Tor build on Sun CC again.
34847 - Fix an off-by-one buffer size in dirserv.c that magically never
34848 hit our three authorities but broke sjmurdoch's own tor network.
34849 - If we as a directory mirror don't know of any v1 directory
34850 authorities, then don't try to cache any v1 directories.
34851 - Stop warning about unknown servers in our family when they are
34852 given as hex digests.
34853 - Stop complaining as quickly to the server operator that he
34854 hasn't registered his nickname/key binding.
34855 - Various cleanups so we can add new V2 Auth Dirservers.
34856 - Change "AllowUnverifiedNodes" to "AllowInvalidNodes", to
34857 reflect the updated flags in our v2 dir protocol.
34858 - Resume allowing non-printable characters for exit streams (both
34859 for connecting and for resolving). Now we tolerate applications
34860 that don't follow the RFCs. But continue to block malformed names
34863 o Bugfixes on 0.1.0.x:
34864 - Fix assert bug in close_logs(): when we close and delete logs,
34865 remove them all from the global "logfiles" list.
34866 - Fix minor integer overflow in calculating when we expect to use up
34867 our bandwidth allocation before hibernating.
34868 - Fix a couple of bugs in OpenSSL detection. Also, deal better when
34869 there are multiple SSLs installed with different versions.
34870 - When we try to be a server and Address is not explicitly set and
34871 our hostname resolves to a private IP address, try to use an
34872 interface address if it has a public address. Now Windows machines
34873 that think of themselves as localhost can work by default.
34876 - Let the controller ask for GETINFO dir/server/foo so it can ask
34877 directly rather than connecting to the dir port.
34878 - Let the controller tell us about certain router descriptors
34879 that it doesn't want Tor to use in circuits. Implement
34880 SETROUTERPURPOSE and modify +POSTDESCRIPTOR to do this.
34881 - New config option SafeSocks to reject all application connections
34882 using unsafe socks protocols. Defaults to off.
34885 Changes in version 0.1.1.15-rc - 2006-03-11
34886 o Bugfixes and cleanups:
34887 - When we're printing strings from the network, don't try to print
34888 non-printable characters. This protects us against shell escape
34889 sequence exploits, and also against attacks to fool humans into
34890 misreading their logs.
34891 - Fix a bug where Tor would fail to establish any connections if you
34892 left it off for 24 hours and then started it: we were happy with
34893 the obsolete network statuses, but they all referred to router
34894 descriptors that were too old to fetch, so we ended up with no
34895 valid router descriptors.
34896 - Fix a seg fault in the controller's "getinfo orconn-status"
34897 command while listing status on incoming handshaking connections.
34898 Introduce a status name "NEW" for these connections.
34899 - If we get a linelist or linelist_s config option from the torrc
34900 (e.g. ExitPolicy) and it has no value, warn and skip rather than
34901 silently resetting it to its default.
34902 - Don't abandon entry guards until they've been down or gone for
34904 - Cleaner and quieter log messages.
34907 - New controller signal NEWNYM that makes new application requests
34908 use clean circuits.
34909 - Add a new circuit purpose 'controller' to let the controller ask
34910 for a circuit that Tor won't try to use. Extend the EXTENDCIRCUIT
34911 controller command to let you specify the purpose if you're
34912 starting a new circuit. Add a new SETCIRCUITPURPOSE controller
34913 command to let you change a circuit's purpose after it's been
34915 - Accept "private:*" in routerdesc exit policies; not generated yet
34916 because older Tors do not understand it.
34917 - Add BSD-style contributed startup script "rc.subr" from Peter
34921 Changes in version 0.1.1.14-alpha - 2006-02-20
34922 o Bugfixes on 0.1.1.x:
34923 - Don't die if we ask for a stdout or stderr log (even implicitly)
34924 and we're set to RunAsDaemon -- just warn.
34925 - We still had a few bugs in the OR connection rotation code that
34926 caused directory servers to slowly aggregate connections to other
34927 fast Tor servers. This time for sure!
34928 - Make log entries on Win32 include the name of the function again.
34929 - We were treating a pair of exit policies if they were equal even
34930 if one said accept and the other said reject -- causing us to
34931 not always publish a new descriptor since we thought nothing
34933 - Retry pending server downloads as well as pending networkstatus
34934 downloads when we unexpectedly get a socks request.
34935 - We were ignoring the IS_FAST flag in the directory status,
34936 meaning we were willing to pick trivial-bandwidth nodes for "fast"
34938 - If the controller's SAVECONF command fails (e.g. due to file
34939 permissions), let the controller know that it failed.
34942 - If we're trying to be a Tor server and running Windows 95/98/ME
34943 as a server, explain that we'll likely crash.
34944 - When we're a server, a client asks for an old-style directory,
34945 and our write bucket is empty, don't give it to him. This way
34946 small servers can continue to serve the directory *sometimes*,
34947 without getting overloaded.
34948 - Compress exit policies even more -- look for duplicate lines
34950 - Clients now honor the "guard" flag in the router status when
34951 picking entry guards, rather than looking at is_fast or is_stable.
34952 - Retain unrecognized lines in $DATADIR/state file, so that we can
34953 be forward-compatible.
34954 - Generate 18.0.0.0/8 address policy format in descs when we can;
34955 warn when the mask is not reducible to a bit-prefix.
34956 - Let the user set ControlListenAddress in the torrc. This can be
34957 dangerous, but there are some cases (like a secured LAN) where it
34959 - Split ReachableAddresses into ReachableDirAddresses and
34960 ReachableORAddresses, so we can restrict Dir conns to port 80
34961 and OR conns to port 443.
34962 - Now we can target arch and OS in rpm builds (contributed by
34963 Phobos). Also make the resulting dist-rpm filename match the
34965 - New config options to help controllers: FetchServerDescriptors
34966 and FetchHidServDescriptors for whether to fetch server
34967 info and hidserv info or let the controller do it, and
34968 PublishServerDescriptor and PublishHidServDescriptors.
34969 - Also let the controller set the __AllDirActionsPrivate config
34970 option if you want all directory fetches/publishes to happen via
34971 Tor (it assumes your controller bootstraps your circuits).
34974 Changes in version 0.1.0.17 - 2006-02-17
34975 o Crash bugfixes on 0.1.0.x:
34976 - When servers with a non-zero DirPort came out of hibernation,
34977 sometimes they would trigger an assert.
34979 o Other important bugfixes:
34980 - On platforms that don't have getrlimit (like Windows), we were
34981 artificially constraining ourselves to a max of 1024
34982 connections. Now just assume that we can handle as many as 15000
34983 connections. Hopefully this won't cause other problems.
34985 o Backported features:
34986 - When we're a server, a client asks for an old-style directory,
34987 and our write bucket is empty, don't give it to him. This way
34988 small servers can continue to serve the directory *sometimes*,
34989 without getting overloaded.
34990 - Whenever you get a 503 in response to a directory fetch, try
34991 once more. This will become important once servers start sending
34992 503's whenever they feel busy.
34993 - Fetch a new directory every 120 minutes, not every 40 minutes.
34994 Now that we have hundreds of thousands of users running the old
34995 directory algorithm, it's starting to hurt a lot.
34996 - Bump up the period for forcing a hidden service descriptor upload
34997 from 20 minutes to 1 hour.
35000 Changes in version 0.1.1.13-alpha - 2006-02-09
35001 o Crashes in 0.1.1.x:
35002 - When you tried to setconf ORPort via the controller, Tor would
35003 crash. So people using TorCP to become a server were sad.
35004 - Solve (I hope) the stack-smashing bug that we were seeing on fast
35005 servers. The problem appears to be something do with OpenSSL's
35006 random number generation, or how we call it, or something. Let me
35007 know if the crashes continue.
35008 - Turn crypto hardware acceleration off by default, until we find
35009 somebody smart who can test it for us. (It appears to produce
35010 seg faults in at least some cases.)
35011 - Fix a rare assert error when we've tried all intro points for
35012 a hidden service and we try fetching the service descriptor again:
35013 "Assertion conn->state != AP_CONN_STATE_RENDDESC_WAIT failed"
35016 - Fix a major load balance bug: we were round-robining in 16 KB
35017 chunks, and servers with bandwidthrate of 20 KB, while downloading
35018 a 600 KB directory, would starve their other connections. Now we
35019 try to be a bit more fair.
35020 - Dir authorities and mirrors were never expiring the newest
35021 descriptor for each server, causing memory and directory bloat.
35022 - Fix memory-bloating and connection-bloating bug on servers: We
35023 were never closing any connection that had ever had a circuit on
35024 it, because we were checking conn->n_circuits == 0, yet we had a
35025 bug that let it go negative.
35026 - Make Tor work using squid as your http proxy again -- squid
35027 returns an error if you ask for a URL that's too long, and it uses
35028 a really generic error message. Plus, many people are behind a
35029 transparent squid so they don't even realize it.
35030 - On platforms that don't have getrlimit (like Windows), we were
35031 artificially constraining ourselves to a max of 1024
35032 connections. Now just assume that we can handle as many as 15000
35033 connections. Hopefully this won't cause other problems.
35034 - Add a new config option ExitPolicyRejectPrivate which defaults to
35035 1. This means all exit policies will begin with rejecting private
35036 addresses, unless the server operator explicitly turns it off.
35039 - Clients no longer download descriptors for non-running
35041 - Before we add new directory authorities, we should make it
35042 clear that only v1 authorities should receive/publish hidden
35043 service descriptors.
35046 - As soon as we've fetched some more directory info, immediately
35047 try to download more server descriptors. This way we don't have
35048 a 10 second pause during initial bootstrapping.
35049 - Remove even more loud log messages that the server operator can't
35051 - When we're running an obsolete or un-recommended version, make
35052 the log message more clear about what the problem is and what
35053 versions *are* still recommended.
35054 - Provide a more useful warn message when our onion queue gets full:
35055 the CPU is too slow or the exit policy is too liberal.
35056 - Don't warn when we receive a 503 from a dirserver/cache -- this
35057 will pave the way for them being able to refuse if they're busy.
35058 - When we fail to bind a listener, try to provide a more useful
35059 log message: e.g., "Is Tor already running?"
35060 - Adjust tor-spec to parameterize cell and key lengths. Now Ian
35061 Goldberg can prove things about our handshake protocol more
35063 - MaxConn has been obsolete for a while now. Document the ConnLimit
35064 config option, which is a *minimum* number of file descriptors
35065 that must be available else Tor refuses to start.
35066 - Apply Matt Ghali's --with-syslog-facility patch to ./configure
35067 if you log to syslog and want something other than LOG_DAEMON.
35068 - Make dirservers generate a separate "guard" flag to mean,
35069 "would make a good entry guard". Make clients parse it and vote
35070 on it. Not used by clients yet.
35071 - Implement --with-libevent-dir option to ./configure. Also, improve
35072 search techniques to find libevent, and use those for openssl too.
35073 - Bump the default bandwidthrate to 3 MB, and burst to 6 MB
35074 - Only start testing reachability once we've established a
35075 circuit. This will make startup on dirservers less noisy.
35076 - Don't try to upload hidden service descriptors until we have
35077 established a circuit.
35078 - Fix the controller's "attachstream 0" command to treat conn like
35079 it just connected, doing address remapping, handling .exit and
35080 .onion idioms, and so on. Now we're more uniform in making sure
35081 that the controller hears about new and closing connections.
35084 Changes in version 0.1.1.12-alpha - 2006-01-11
35085 o Bugfixes on 0.1.1.x:
35086 - The fix to close duplicate server connections was closing all
35087 Tor client connections if they didn't establish a circuit
35088 quickly enough. Oops.
35089 - Fix minor memory issue (double-free) that happened on exit.
35091 o Bugfixes on 0.1.0.x:
35092 - Tor didn't warn when it failed to open a log file.
35095 Changes in version 0.1.1.11-alpha - 2006-01-10
35096 o Crashes in 0.1.1.x:
35097 - Include all the assert/crash fixes from 0.1.0.16.
35098 - If you start Tor and then quit very quickly, there were some
35099 races that tried to free things that weren't allocated yet.
35100 - Fix a rare memory stomp if you're running hidden services.
35101 - Fix segfault when specifying DirServer in config without nickname.
35102 - Fix a seg fault when you finish connecting to a server but at
35103 that moment you dump his server descriptor.
35104 - Extendcircuit and Attachstream controller commands would
35105 assert/crash if you don't give them enough arguments.
35106 - Fix an assert error when we're out of space in the connection_list
35107 and we try to post a hidden service descriptor (reported by weasel).
35108 - If you specify a relative torrc path and you set RunAsDaemon in
35109 your torrc, then it chdir()'s to the new directory. If you HUP,
35110 it tries to load the new torrc location, fails, and exits.
35111 The fix: no longer allow a relative path to torrc using -f.
35114 - Implement "entry guards": automatically choose a handful of entry
35115 nodes and stick with them for all circuits. Only pick new guards
35116 when the ones you have are unsuitable, and if the old guards
35117 become suitable again, switch back. This will increase security
35118 dramatically against certain end-point attacks. The EntryNodes
35119 config option now provides some hints about which entry guards you
35120 want to use most; and StrictEntryNodes means to only use those.
35121 - New directory logic: download by descriptor digest, not by
35122 fingerprint. Caches try to download all listed digests from
35123 authorities; clients try to download "best" digests from caches.
35124 This avoids partitioning and isolating attacks better.
35125 - Make the "stable" router flag in network-status be the median of
35126 the uptimes of running valid servers, and make clients pay
35127 attention to the network-status flags. Thus the cutoff adapts
35128 to the stability of the network as a whole, making IRC, IM, etc
35129 connections more reliable.
35132 - Tor servers with dynamic IP addresses were needing to wait 18
35133 hours before they could start doing reachability testing using
35134 the new IP address and ports. This is because they were using
35135 the internal descriptor to learn what to test, yet they were only
35136 rebuilding the descriptor once they decided they were reachable.
35137 - Tor 0.1.1.9 and 0.1.1.10 had a serious bug that caused clients
35138 to download certain server descriptors, throw them away, and then
35139 fetch them again after 30 minutes. Now mirrors throw away these
35140 server descriptors so clients can't get them.
35141 - We were leaving duplicate connections to other ORs open for a week,
35142 rather than closing them once we detect a duplicate. This only
35143 really affected authdirservers, but it affected them a lot.
35144 - Spread the authdirservers' reachability testing over the entire
35145 testing interval, so we don't try to do 500 TLS's at once every
35149 - If the network is down, and we try to connect to a conn because
35150 we have a circuit in mind, and we timeout (30 seconds) because the
35151 network never answers, we were expiring the circuit, but we weren't
35152 obsoleting the connection or telling the entry_guards functions.
35153 - Some Tor servers process billions of cells per day. These statistics
35154 need to be uint64_t's.
35155 - Check for integer overflows in more places, when adding elements
35156 to smartlists. This could possibly prevent a buffer overflow
35157 on malicious huge inputs. I don't see any, but I haven't looked
35159 - ReachableAddresses kept growing new "reject *:*" lines on every
35161 - When you "setconf log" via the controller, it should remove all
35162 logs. We were automatically adding back in a "log notice stdout".
35163 - Newly bootstrapped Tor networks couldn't establish hidden service
35164 circuits until they had nodes with high uptime. Be more tolerant.
35165 - We were marking servers down when they could not answer every piece
35166 of the directory request we sent them. This was far too harsh.
35167 - Fix the torify (tsocks) config file to not use Tor for localhost
35169 - Directory authorities now go to the proper authority when asking for
35170 a networkstatus, even when they want a compressed one.
35171 - Fix a harmless bug that was causing Tor servers to log
35172 "Got an end because of misc error, but we're not an AP. Closing."
35173 - Authorities were treating their own descriptor changes as cosmetic,
35174 meaning the descriptor available in the network-status and the
35175 descriptor that clients downloaded were different.
35176 - The OS X installer was adding a symlink for tor_resolve but
35177 the binary was called tor-resolve (reported by Thomas Hardly).
35178 - Workaround a problem with some http proxies where they refuse GET
35179 requests that specify "Content-Length: 0" (reported by Adrian).
35180 - Fix wrong log message when you add a "HiddenServiceNodes" config
35181 line without any HiddenServiceDir line (reported by Chris Thomas).
35184 - Write the TorVersion into the state file so we have a prayer of
35185 keeping forward and backward compatibility.
35186 - Revive the FascistFirewall config option rather than eliminating it:
35187 now it's a synonym for ReachableAddresses *:80,*:443.
35188 - Clients choose directory servers from the network status lists,
35189 not from their internal list of router descriptors. Now they can
35190 go to caches directly rather than needing to go to authorities
35192 - Directory authorities ignore router descriptors that have only
35193 cosmetic differences: do this for 0.1.0.x servers now too.
35194 - Add a new flag to network-status indicating whether the server
35195 can answer v2 directory requests too.
35196 - Authdirs now stop whining so loudly about bad descriptors that
35197 they fetch from other dirservers. So when there's a log complaint,
35198 it's for sure from a freshly uploaded descriptor.
35199 - Reduce memory requirements in our structs by changing the order
35201 - There used to be two ways to specify your listening ports in a
35202 server descriptor: on the "router" line and with a separate "ports"
35203 line. Remove support for the "ports" line.
35204 - New config option "AuthDirRejectUnlisted" for auth dirservers as
35205 a panic button: if we get flooded with unusable servers we can
35206 revert to only listing servers in the approved-routers file.
35207 - Auth dir servers can now mark a fingerprint as "!reject" or
35208 "!invalid" in the approved-routers file (as its nickname), to
35209 refuse descriptors outright or include them but marked as invalid.
35210 - Servers store bandwidth history across restarts/crashes.
35211 - Add reasons to DESTROY and RELAY_TRUNCATED cells, so clients can
35212 get a better idea of why their circuits failed. Not used yet.
35213 - Directory mirrors now cache up to 16 unrecognized network-status
35214 docs. Now we can add new authdirservers and they'll be cached too.
35215 - When picking a random directory, prefer non-authorities if any
35217 - New controller option "getinfo desc/all-recent" to fetch the
35218 latest server descriptor for every router that Tor knows about.
35221 Changes in version 0.1.0.16 - 2006-01-02
35222 o Crash bugfixes on 0.1.0.x:
35223 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
35224 corrupting the heap, losing FDs, or crashing when we need to resize
35225 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
35226 - It turns out sparc64 platforms crash on unaligned memory access
35227 too -- so detect and avoid this.
35228 - Handle truncated compressed data correctly (by detecting it and
35230 - Fix possible-but-unlikely free(NULL) in control.c.
35231 - When we were closing connections, there was a rare case that
35232 stomped on memory, triggering seg faults and asserts.
35233 - Avoid potential infinite recursion when building a descriptor. (We
35234 don't know that it ever happened, but better to fix it anyway.)
35235 - We were neglecting to unlink marked circuits from soon-to-close OR
35236 connections, which caused some rare scribbling on freed memory.
35237 - Fix a memory stomping race bug when closing the joining point of two
35238 rendezvous circuits.
35239 - Fix an assert in time parsing found by Steven Murdoch.
35241 o Other bugfixes on 0.1.0.x:
35242 - When we're doing reachability testing, provide more useful log
35243 messages so the operator knows what to expect.
35244 - Do not check whether DirPort is reachable when we are suppressing
35245 advertising it because of hibernation.
35246 - When building with -static or on Solaris, we sometimes needed -ldl.
35247 - When we're deciding whether a stream has enough circuits around
35248 that can handle it, count the freshly dirty ones and not the ones
35249 that are so dirty they won't be able to handle it.
35250 - When we're expiring old circuits, we had a logic error that caused
35251 us to close new rendezvous circuits rather than old ones.
35252 - Give a more helpful log message when you try to change ORPort via
35253 the controller: you should upgrade Tor if you want that to work.
35254 - We were failing to parse Tor versions that start with "Tor ".
35255 - Tolerate faulty streams better: when a stream fails for reason
35256 exitpolicy, stop assuming that the router is lying about his exit
35257 policy. When a stream fails for reason misc, allow it to retry just
35258 as if it was resolvefailed. When a stream has failed three times,
35259 reset its failure count so we can try again and get all three tries.
35262 Changes in version 0.1.1.10-alpha - 2005-12-11
35263 o Correctness bugfixes on 0.1.0.x:
35264 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
35265 corrupting the heap, losing FDs, or crashing when we need to resize
35266 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
35267 - Stop doing the complex voodoo overkill checking for insecure
35268 Diffie-Hellman keys. Just check if it's in [2,p-2] and be happy.
35269 - When we were closing connections, there was a rare case that
35270 stomped on memory, triggering seg faults and asserts.
35271 - We were neglecting to unlink marked circuits from soon-to-close OR
35272 connections, which caused some rare scribbling on freed memory.
35273 - When we're deciding whether a stream has enough circuits around
35274 that can handle it, count the freshly dirty ones and not the ones
35275 that are so dirty they won't be able to handle it.
35276 - Recover better from TCP connections to Tor servers that are
35277 broken but don't tell you (it happens!); and rotate TLS
35278 connections once a week.
35279 - When we're expiring old circuits, we had a logic error that caused
35280 us to close new rendezvous circuits rather than old ones.
35281 - Fix a scary-looking but apparently harmless bug where circuits
35282 would sometimes start out in state CIRCUIT_STATE_OR_WAIT at
35283 servers, and never switch to state CIRCUIT_STATE_OPEN.
35284 - When building with -static or on Solaris, we sometimes needed to
35286 - Give a useful message when people run Tor as the wrong user,
35287 rather than telling them to start chowning random directories.
35288 - We were failing to inform the controller about new .onion streams.
35290 o Security bugfixes on 0.1.0.x:
35291 - Refuse server descriptors if the fingerprint line doesn't match
35292 the included identity key. Tor doesn't care, but other apps (and
35293 humans) might actually be trusting the fingerprint line.
35294 - We used to kill the circuit when we receive a relay command we
35295 don't recognize. Now we just drop it.
35296 - Start obeying our firewall options more rigorously:
35297 . If we can't get to a dirserver directly, try going via Tor.
35298 . Don't ever try to connect (as a client) to a place our
35299 firewall options forbid.
35300 . If we specify a proxy and also firewall options, obey the
35301 firewall options even when we're using the proxy: some proxies
35302 can only proxy to certain destinations.
35303 - Fix a bug found by Lasse Overlier: when we were making internal
35304 circuits (intended to be cannibalized later for rendezvous and
35305 introduction circuits), we were picking them so that they had
35306 useful exit nodes. There was no need for this, and it actually
35307 aids some statistical attacks.
35308 - Start treating internal circuits and exit circuits separately.
35309 It's important to keep them separate because internal circuits
35310 have their last hops picked like middle hops, rather than like
35311 exit hops. So exiting on them will break the user's expectations.
35313 o Bugfixes on 0.1.1.x:
35314 - Take out the mis-feature where we tried to detect IP address
35315 flapping for people with DynDNS, and chose not to upload a new
35316 server descriptor sometimes.
35317 - Try to be compatible with OpenSSL 0.9.6 again.
35318 - Log fix: when the controller is logging about .onion addresses,
35319 sometimes it didn't include the ".onion" part of the address.
35320 - Don't try to modify options->DirServers internally -- if the
35321 user didn't specify any, just add the default ones directly to
35322 the trusted dirserver list. This fixes a bug where people running
35323 controllers would use SETCONF on some totally unrelated config
35324 option, and Tor would start yelling at them about changing their
35326 - Let the controller's redirectstream command specify a port, in
35327 case the controller wants to change that too.
35328 - When we requested a pile of server descriptors, we sometimes
35329 accidentally launched a duplicate request for the first one.
35330 - Bugfix for trackhostexits: write down the fingerprint of the
35331 chosen exit, not its nickname, because the chosen exit might not
35333 - When parsing foo.exit, if foo is unknown, and we are leaving
35334 circuits unattached, set the chosen_exit field and leave the
35335 address empty. This matters because controllers got confused
35337 - Directory authorities no longer try to download server
35338 descriptors that they know they will reject.
35340 o Features and updates:
35341 - Replace balanced trees with hash tables: this should make stuff
35342 significantly faster.
35343 - Resume using the AES counter-mode implementation that we ship,
35344 rather than OpenSSL's. Ours is significantly faster.
35345 - Many other CPU and memory improvements.
35346 - Add a new config option FastFirstHopPK (on by default) so clients
35347 do a trivial crypto handshake for their first hop, since TLS has
35348 already taken care of confidentiality and authentication.
35349 - Add a new config option TestSocks so people can see if their
35350 applications are using socks4, socks4a, socks5-with-ip, or
35351 socks5-with-hostname. This way they don't have to keep mucking
35352 with tcpdump and wondering if something got cached somewhere.
35353 - Warn when listening on a public address for socks. I suspect a
35354 lot of people are setting themselves up as open socks proxies,
35355 and they have no idea that jerks on the Internet are using them,
35356 since they simply proxy the traffic into the Tor network.
35357 - Add "private:*" as an alias in configuration for policies. Now
35358 you can simplify your exit policy rather than needing to list
35359 every single internal or nonroutable network space.
35360 - Add a new controller event type that allows controllers to get
35361 all server descriptors that were uploaded to a router in its role
35362 as authoritative dirserver.
35363 - Start shipping socks-extensions.txt, tor-doc-unix.html,
35364 tor-doc-server.html, and stylesheet.css in the tarball.
35365 - Stop shipping tor-doc.html in the tarball.
35368 Changes in version 0.1.1.9-alpha - 2005-11-15
35369 o Usability improvements:
35370 - Start calling it FooListenAddress rather than FooBindAddress,
35371 since few of our users know what it means to bind an address
35373 - Reduce clutter in server logs. We're going to try to make
35374 them actually usable now. New config option ProtocolWarnings that
35375 lets you hear about how _other Tors_ are breaking the protocol. Off
35377 - Divide log messages into logging domains. Once we put some sort
35378 of interface on this, it will let people looking at more verbose
35379 log levels specify the topics they want to hear more about.
35380 - Make directory servers return better http 404 error messages
35381 instead of a generic "Servers unavailable".
35382 - Check for even more Windows version flags when writing the platform
35383 string in server descriptors, and note any we don't recognize.
35384 - Clean up more of the OpenSSL memory when exiting, so we can detect
35385 memory leaks better.
35386 - Make directory authorities be non-versioning, non-naming by
35387 default. Now we can add new directory servers without requiring
35388 their operators to pay close attention.
35389 - When logging via syslog, include the pid whenever we provide
35390 a log entry. Suggested by Todd Fries.
35392 o Performance improvements:
35393 - Directory servers now silently throw away new descriptors that
35394 haven't changed much if the timestamps are similar. We do this to
35395 tolerate older Tor servers that upload a new descriptor every 15
35396 minutes. (It seemed like a good idea at the time.)
35397 - Inline bottleneck smartlist functions; use fast versions by default.
35398 - Add a "Map from digest to void*" abstraction digestmap_t so we
35399 can do less hex encoding/decoding. Use it in router_get_by_digest()
35400 to resolve a performance bottleneck.
35401 - Allow tor_gzip_uncompress to extract as much as possible from
35402 truncated compressed data. Try to extract as many
35403 descriptors as possible from truncated http responses (when
35404 DIR_PURPOSE_FETCH_ROUTERDESC).
35405 - Make circ->onionskin a pointer, not a static array. moria2 was using
35406 125000 circuit_t's after it had been up for a few weeks, which
35407 translates to 20+ megs of wasted space.
35408 - The private half of our EDH handshake keys are now chosen out
35409 of 320 bits, not 1024 bits. (Suggested by Ian Goldberg.)
35411 o Security improvements:
35412 - Start making directory caches retain old routerinfos, so soon
35413 clients can start asking by digest of descriptor rather than by
35414 fingerprint of server.
35415 - Add half our entropy from RAND_poll in OpenSSL. This knows how
35416 to use egd (if present), openbsd weirdness (if present), vms/os2
35417 weirdness (if we ever port there), and more in the future.
35419 o Bugfixes on 0.1.0.x:
35420 - Do round-robin writes of at most 16 kB per write. This might be
35421 more fair on loaded Tor servers, and it might resolve our Windows
35422 crash bug. It might also slow things down.
35423 - Our TLS handshakes were generating a single public/private
35424 keypair for the TLS context, rather than making a new one for
35425 each new connections. Oops. (But we were still rotating them
35426 periodically, so it's not so bad.)
35427 - When we were cannibalizing a circuit with a particular exit
35428 node in mind, we weren't checking to see if that exit node was
35429 already present earlier in the circuit. Oops.
35430 - When a Tor server's IP changes (e.g. from a dyndns address),
35431 upload a new descriptor so clients will learn too.
35432 - Really busy servers were keeping enough circuits open on stable
35433 connections that they were wrapping around the circuit_id
35434 space. (It's only two bytes.) This exposed a bug where we would
35435 feel free to reuse a circuit_id even if it still exists but has
35436 been marked for close. Try to fix this bug. Some bug remains.
35437 - If we would close a stream early (e.g. it asks for a .exit that
35438 we know would refuse it) but the LeaveStreamsUnattached config
35439 option is set by the controller, then don't close it.
35441 o Bugfixes on 0.1.1.8-alpha:
35442 - Fix a big pile of memory leaks, some of them serious.
35443 - Do not try to download a routerdesc if we would immediately reject
35445 - Resume inserting a newline between all router descriptors when
35446 generating (old style) signed directories, since our spec says
35448 - When providing content-type application/octet-stream for
35449 server descriptors using .z, we were leaving out the
35450 content-encoding header. Oops. (Everything tolerated this just
35451 fine, but that doesn't mean we need to be part of the problem.)
35452 - Fix a potential seg fault in getconf and getinfo using version 1
35453 of the controller protocol.
35454 - Avoid crash: do not check whether DirPort is reachable when we
35455 are suppressing it because of hibernation.
35456 - Make --hash-password not crash on exit.
35459 Changes in version 0.1.1.8-alpha - 2005-10-07
35460 o New features (major):
35461 - Clients don't download or use the directory anymore. Now they
35462 download and use network-statuses from the trusted dirservers,
35463 and fetch individual server descriptors as needed from mirrors.
35464 See dir-spec.txt for all the gory details.
35465 - Be more conservative about whether to advertise our DirPort.
35466 The main change is to not advertise if we're running at capacity
35467 and either a) we could hibernate or b) our capacity is low and
35468 we're using a default DirPort.
35469 - Use OpenSSL's AES when OpenSSL has version 0.9.7 or later.
35471 o New features (minor):
35472 - Try to be smart about when to retry network-status and
35473 server-descriptor fetches. Still needs some tuning.
35474 - Stop parsing, storing, or using running-routers output (but
35475 mirrors still cache and serve it).
35476 - Consider a threshold of versioning dirservers (dirservers who have
35477 an opinion about which Tor versions are still recommended) before
35478 deciding whether to warn the user that he's obsolete.
35479 - Dirservers can now reject/invalidate by key and IP, with the
35480 config options "AuthDirInvalid" and "AuthDirReject". This is
35481 useful since currently we automatically list servers as running
35482 and usable even if we know they're jerks.
35483 - Provide dire warnings to any users who set DirServer; move it out
35484 of torrc.sample and into torrc.complete.
35485 - Add MyFamily to torrc.sample in the server section.
35486 - Add nicknames to the DirServer line, so we can refer to them
35487 without requiring all our users to memorize their IP addresses.
35488 - When we get an EOF or a timeout on a directory connection, note
35489 how many bytes of serverdesc we are dropping. This will help
35490 us determine whether it is smart to parse incomplete serverdesc
35492 - Add a new function to "change pseudonyms" -- that is, to stop
35493 using any currently-dirty circuits for new streams, so we don't
35494 link new actions to old actions. Currently it's only called on
35495 HUP (or SIGNAL RELOAD).
35496 - On sighup, if UseHelperNodes changed to 1, use new circuits.
35497 - Start using RAND_bytes rather than RAND_pseudo_bytes from
35498 OpenSSL. Also, reseed our entropy every hour, not just at
35499 startup. And entropy in 512-bit chunks, not 160-bit chunks.
35501 o Fixes on 0.1.1.7-alpha:
35502 - Nobody ever implemented EVENT_ADDRMAP for control protocol
35503 version 0, so don't let version 0 controllers ask for it.
35504 - If you requested something with too many newlines via the
35505 v1 controller protocol, you could crash tor.
35506 - Fix a number of memory leaks, including some pretty serious ones.
35507 - Re-enable DirPort testing again, so Tor servers will be willing
35508 to advertise their DirPort if it's reachable.
35509 - On TLS handshake, only check the other router's nickname against
35510 its expected nickname if is_named is set.
35512 o Fixes forward-ported from 0.1.0.15:
35513 - Don't crash when we don't have any spare file descriptors and we
35514 try to spawn a dns or cpu worker.
35515 - Make the numbers in read-history and write-history into uint64s,
35516 so they don't overflow and publish negatives in the descriptor.
35518 o Fixes on 0.1.0.x:
35519 - For the OS X package's modified privoxy config file, comment
35520 out the "logfile" line so we don't log everything passed
35522 - We were whining about using socks4 or socks5-with-local-lookup
35523 even when it's an IP in the "virtual" range we designed exactly
35525 - We were leaking some memory every time the client changes IPs.
35526 - Never call free() on tor_malloc()d memory. This will help us
35527 use dmalloc to detect memory leaks.
35528 - Check for named servers when looking them up by nickname;
35529 warn when we'recalling a non-named server by its nickname;
35530 don't warn twice about the same name.
35531 - Try to list MyFamily elements by key, not by nickname, and warn
35532 if we've not heard of the server.
35533 - Make windows platform detection (uname equivalent) smarter.
35534 - It turns out sparc64 doesn't like unaligned access either.
35537 Changes in version 0.1.0.15 - 2005-09-23
35538 o Bugfixes on 0.1.0.x:
35539 - Reject ports 465 and 587 (spam targets) in default exit policy.
35540 - Don't crash when we don't have any spare file descriptors and we
35541 try to spawn a dns or cpu worker.
35542 - Get rid of IgnoreVersion undocumented config option, and make us
35543 only warn, never exit, when we're running an obsolete version.
35544 - Don't try to print a null string when your server finds itself to
35545 be unreachable and the Address config option is empty.
35546 - Make the numbers in read-history and write-history into uint64s,
35547 so they don't overflow and publish negatives in the descriptor.
35548 - Fix a minor memory leak in smartlist_string_remove().
35549 - We were only allowing ourselves to upload a server descriptor at
35550 most every 20 minutes, even if it changed earlier than that.
35551 - Clean up log entries that pointed to old URLs.
35554 Changes in version 0.1.1.7-alpha - 2005-09-14
35555 o Fixes on 0.1.1.6-alpha:
35556 - Exit servers were crashing when people asked them to make a
35557 connection to an address not in their exit policy.
35558 - Looking up a non-existent stream for a v1 control connection would
35560 - Fix a seg fault if we ask a dirserver for a descriptor by
35561 fingerprint but he doesn't know about him.
35562 - SETCONF was appending items to linelists, not clearing them.
35563 - SETCONF SocksBindAddress killed Tor if it fails to bind. Now back
35564 out and refuse the setconf if it would fail.
35565 - Downgrade the dirserver log messages when whining about
35569 - Add Peter Palfrader's check-tor script to tor/contrib/
35570 It lets you easily check whether a given server (referenced by
35571 nickname) is reachable by you.
35572 - Numerous changes to move towards client-side v2 directories. Not
35575 o Fixes on 0.1.0.x:
35576 - If the user gave tor an odd number of command-line arguments,
35577 we were silently ignoring the last one. Now we complain and fail.
35578 [This wins the oldest-bug prize -- this bug has been present since
35579 November 2002, as released in Tor 0.0.0.]
35580 - Do not use unaligned memory access on alpha, mips, or mipsel.
35581 It *works*, but is very slow, so we treat them as if it doesn't.
35582 - Retry directory requests if we fail to get an answer we like
35583 from a given dirserver (we were retrying before, but only if
35584 we fail to connect).
35585 - When writing the RecommendedVersions line, sort them first.
35586 - When the client asked for a rendezvous port that the hidden
35587 service didn't want to provide, we were sending an IP address
35588 back along with the end cell. Fortunately, it was zero. But stop
35590 - Correct "your server is reachable" log entries to indicate that
35591 it was self-testing that told us so.
35594 Changes in version 0.1.1.6-alpha - 2005-09-09
35595 o Fixes on 0.1.1.5-alpha:
35596 - We broke fascistfirewall in 0.1.1.5-alpha. Oops.
35597 - Fix segfault in unit tests in 0.1.1.5-alpha. Oops.
35598 - Fix bug with tor_memmem finding a match at the end of the string.
35599 - Make unit tests run without segfaulting.
35600 - Resolve some solaris x86 compile warnings.
35601 - Handle duplicate lines in approved-routers files without warning.
35602 - Fix bug where as soon as a server refused any requests due to his
35603 exit policy (e.g. when we ask for localhost and he tells us that's
35604 127.0.0.1 and he won't do it), we decided he wasn't obeying his
35605 exit policy using him for any exits.
35606 - Only do openssl hardware accelerator stuff if openssl version is
35609 o New controller features/fixes:
35610 - Add a "RESETCONF" command so you can set config options like
35611 AllowUnverifiedNodes and LongLivedPorts to "". Also, if you give
35612 a config option in the torrc with no value, then it clears it
35613 entirely (rather than setting it to its default).
35614 - Add a "GETINFO config-file" to tell us where torrc is.
35615 - Avoid sending blank lines when GETINFO replies should be empty.
35616 - Add a QUIT command for the controller (for using it manually).
35617 - Fix a bug in SAVECONF that was adding default dirservers and
35618 other redundant entries to the torrc file.
35620 o Start on the new directory design:
35621 - Generate, publish, cache, serve new network-status format.
35622 - Publish individual descriptors (by fingerprint, by "all", and by
35624 - Publish client and server recommended versions separately.
35625 - Allow tor_gzip_uncompress() to handle multiple concatenated
35626 compressed strings. Serve compressed groups of router
35627 descriptors. The compression logic here could be more
35629 - Distinguish v1 authorities (all currently trusted directories)
35630 from v2 authorities (all trusted directories).
35631 - Change DirServers config line to note which dirs are v1 authorities.
35632 - Add configuration option "V1AuthoritativeDirectory 1" which
35633 moria1, moria2, and tor26 should set.
35634 - Remove option when getting directory cache to see whether they
35635 support running-routers; they all do now. Replace it with one
35636 to see whether caches support v2 stuff.
35639 - Dirservers now do their own external reachability testing of each
35640 Tor server, and only list them as running if they've been found to
35641 be reachable. We also send back warnings to the server's logs if
35642 it uploads a descriptor that we already believe is unreachable.
35643 - Implement exit enclaves: if we know an IP address for the
35644 destination, and there's a running Tor server at that address
35645 which allows exit to the destination, then extend the circuit to
35646 that exit first. This provides end-to-end encryption and end-to-end
35647 authentication. Also, if the user wants a .exit address or enclave,
35648 use 4 hops rather than 3, and cannibalize a general circ for it
35650 - Permit transitioning from ORPort=0 to ORPort!=0, and back, from the
35651 controller. Also, rotate dns and cpu workers if the controller
35652 changes options that will affect them; and initialize the dns
35653 worker cache tree whether or not we start out as a server.
35654 - Only upload a new server descriptor when options change, 18
35655 hours have passed, uptime is reset, or bandwidth changes a lot.
35656 - Check [X-]Forwarded-For headers in HTTP requests when generating
35657 log messages. This lets people run dirservers (and caches) behind
35658 Apache but still know which IP addresses are causing warnings.
35660 o Config option changes:
35661 - Replace (Fascist)Firewall* config options with a new
35662 ReachableAddresses option that understands address policies.
35663 For example, "ReachableAddresses *:80,*:443"
35664 - Get rid of IgnoreVersion undocumented config option, and make us
35665 only warn, never exit, when we're running an obsolete version.
35666 - Make MonthlyAccountingStart config option truly obsolete now.
35668 o Fixes on 0.1.0.x:
35669 - Reject ports 465 and 587 in the default exit policy, since
35670 people have started using them for spam too.
35671 - It turns out we couldn't bootstrap a network since we added
35672 reachability detection in 0.1.0.1-rc. Good thing the Tor network
35673 has never gone down. Add an AssumeReachable config option to let
35674 servers and dirservers bootstrap. When we're trying to build a
35675 high-uptime or high-bandwidth circuit but there aren't enough
35676 suitable servers, try being less picky rather than simply failing.
35677 - Our logic to decide if the OR we connected to was the right guy
35678 was brittle and maybe open to a mitm for unverified routers.
35679 - We weren't cannibalizing circuits correctly for
35680 CIRCUIT_PURPOSE_C_ESTABLISH_REND and
35681 CIRCUIT_PURPOSE_S_ESTABLISH_INTRO, so we were being forced to
35682 build those from scratch. This should make hidden services faster.
35683 - Predict required circuits better, with an eye toward making hidden
35684 services faster on the service end.
35685 - Retry streams if the exit node sends back a 'misc' failure. This
35686 should result in fewer random failures. Also, after failing
35687 from resolve failed or misc, reset the num failures, so we give
35688 it a fair shake next time we try.
35689 - Clean up the rendezvous warn log msgs, and downgrade some to info.
35690 - Reduce severity on logs about dns worker spawning and culling.
35691 - When we're shutting down and we do something like try to post a
35692 server descriptor or rendezvous descriptor, don't complain that
35693 we seem to be unreachable. Of course we are, we're shutting down.
35694 - Add TTLs to RESOLVED, CONNECTED, and END_REASON_EXITPOLICY cells.
35695 We don't use them yet, but maybe one day our DNS resolver will be
35696 able to discover them.
35697 - Make ContactInfo mandatory for authoritative directory servers.
35698 - Require server descriptors to list IPv4 addresses -- hostnames
35699 are no longer allowed. This also fixes some potential security
35700 problems with people providing hostnames as their address and then
35701 preferentially resolving them to partition users.
35702 - Change log line for unreachability to explicitly suggest /etc/hosts
35703 as the culprit. Also make it clearer what IP address and ports we're
35704 testing for reachability.
35705 - Put quotes around user-supplied strings when logging so users are
35706 more likely to realize if they add bad characters (like quotes)
35708 - Let auth dir servers start without specifying an Address config
35710 - Make unit tests (and other invocations that aren't the real Tor)
35711 run without launching listeners, creating subdirectories, and so on.
35714 Changes in version 0.1.1.5-alpha - 2005-08-08
35715 o Bugfixes included in 0.1.0.14.
35717 o Bugfixes on 0.1.0.x:
35718 - If you write "HiddenServicePort 6667 127.0.0.1 6668" in your
35719 torrc rather than "HiddenServicePort 6667 127.0.0.1:6668",
35720 it would silently using ignore the 6668.
35723 Changes in version 0.1.0.14 - 2005-08-08
35724 o Bugfixes on 0.1.0.x:
35725 - Fix the other half of the bug with crypto handshakes
35727 - Fix an assert trigger if you send a 'signal term' via the
35728 controller when it's listening for 'event info' messages.
35731 Changes in version 0.1.1.4-alpha - 2005-08-04
35732 o Bugfixes included in 0.1.0.13.
35735 - Improve tor_gettimeofday() granularity on windows.
35736 - Make clients regenerate their keys when their IP address changes.
35737 - Implement some more GETINFO goodness: expose helper nodes, config
35738 options, getinfo keys.
35741 Changes in version 0.1.0.13 - 2005-08-04
35742 o Bugfixes on 0.1.0.x:
35743 - Fix a critical bug in the security of our crypto handshakes.
35744 - Fix a size_t underflow in smartlist_join_strings2() that made
35745 it do bad things when you hand it an empty smartlist.
35746 - Fix Windows installer to ship Tor license (thanks to Aphex for
35747 pointing out this oversight) and put a link to the doc directory
35749 - Explicitly set no-unaligned-access for sparc: it turns out the
35750 new gcc's let you compile broken code, but that doesn't make it
35754 Changes in version 0.1.1.3-alpha - 2005-07-23
35755 o Bugfixes on 0.1.1.2-alpha:
35756 - Fix a bug in handling the controller's "post descriptor"
35758 - Fix several bugs in handling the controller's "extend circuit"
35760 - Fix a bug in handling the controller's "stream status" event.
35761 - Fix an assert failure if we have a controller listening for
35762 circuit events and we go offline.
35763 - Re-allow hidden service descriptors to publish 0 intro points.
35764 - Fix a crash when generating your hidden service descriptor if
35765 you don't have enough intro points already.
35767 o New features on 0.1.1.2-alpha:
35768 - New controller function "getinfo accounting", to ask how
35769 many bytes we've used in this time period.
35770 - Experimental support for helper nodes: a lot of the risk from
35771 a small static adversary comes because users pick new random
35772 nodes every time they rebuild a circuit. Now users will try to
35773 stick to the same small set of entry nodes if they can. Not
35774 enabled by default yet.
35776 o Bugfixes on 0.1.0.12:
35777 - If you're an auth dir server, always publish your dirport,
35778 even if you haven't yet found yourself to be reachable.
35779 - Fix a size_t underflow in smartlist_join_strings2() that made
35780 it do bad things when you hand it an empty smartlist.
35783 Changes in version 0.1.0.12 - 2005-07-18
35784 o New directory servers:
35785 - tor26 has changed IP address.
35787 o Bugfixes on 0.1.0.x:
35788 - Fix a possible double-free in tor_gzip_uncompress().
35789 - When --disable-threads is set, do not search for or link against
35790 pthreads libraries.
35791 - Don't trigger an assert if an authoritative directory server
35792 claims its dirport is 0.
35793 - Fix bug with removing Tor as an NT service: some people were
35794 getting "The service did not return an error." Thanks to Matt
35798 Changes in version 0.1.1.2-alpha - 2005-07-15
35799 o New directory servers:
35800 - tor26 has changed IP address.
35802 o Bugfixes on 0.1.0.x, crashes/leaks:
35803 - Port the servers-not-obeying-their-exit-policies fix from
35805 - Fix an fd leak in start_daemon().
35806 - On Windows, you can't always reopen a port right after you've
35807 closed it. So change retry_listeners() to only close and re-open
35808 ports that have changed.
35809 - Fix a possible double-free in tor_gzip_uncompress().
35811 o Bugfixes on 0.1.0.x, usability:
35812 - When tor_socketpair() fails in Windows, give a reasonable
35813 Windows-style errno back.
35814 - Let people type "tor --install" as well as "tor -install" when
35816 want to make it an NT service.
35817 - NT service patch from Matt Edman to improve error messages.
35818 - When the controller asks for a config option with an abbreviated
35819 name, give the full name in our response.
35820 - Correct the man page entry on TrackHostExitsExpire.
35821 - Looks like we were never delivering deflated (i.e. compressed)
35822 running-routers lists, even when asked. Oops.
35823 - When --disable-threads is set, do not search for or link against
35824 pthreads libraries.
35826 o Bugfixes on 0.1.1.x:
35827 - Fix a seg fault with autodetecting which controller version is
35831 - New hidden service descriptor format: put a version in it, and
35832 let people specify introduction/rendezvous points that aren't
35833 in "the directory" (which is subjective anyway).
35834 - Allow the DEBUG controller event to work again. Mark certain log
35835 entries as "don't tell this to controllers", so we avoid cycles.
35838 Changes in version 0.1.0.11 - 2005-06-30
35839 o Bugfixes on 0.1.0.x:
35840 - Fix major security bug: servers were disregarding their
35841 exit policies if clients behaved unexpectedly.
35842 - Make OS X init script check for missing argument, so we don't
35843 confuse users who invoke it incorrectly.
35844 - Fix a seg fault in "tor --hash-password foo".
35845 - The MAPADDRESS control command was broken.
35848 Changes in version 0.1.1.1-alpha - 2005-06-29
35850 - Make OS X init script check for missing argument, so we don't
35851 confuse users who invoke it incorrectly.
35852 - Fix a seg fault in "tor --hash-password foo".
35853 - Fix a possible way to DoS dirservers.
35854 - When we complain that your exit policy implicitly allows local or
35855 private address spaces, name them explicitly so operators can
35857 - Make the log message less scary when all the dirservers are
35858 temporarily unreachable.
35859 - We were printing the number of idle dns workers incorrectly when
35863 - Revised controller protocol (version 1) that uses ascii rather
35864 than binary. Add supporting libraries in python and java so you
35865 can use the controller from your applications without caring how
35866 our protocol works.
35867 - Spiffy new support for crypto hardware accelerators. Can somebody
35871 Changes in version 0.0.9.10 - 2005-06-16
35872 o Bugfixes on 0.0.9.x (backported from 0.1.0.10):
35873 - Refuse relay cells that claim to have a length larger than the
35874 maximum allowed. This prevents a potential attack that could read
35875 arbitrary memory (e.g. keys) from an exit server's process
35879 Changes in version 0.1.0.10 - 2005-06-14
35880 o Allow a few EINVALs from libevent before dying. Warn on kqueue with
35881 libevent before 1.1a.
35884 Changes in version 0.1.0.9-rc - 2005-06-09
35886 - Reset buf->highwater every time buf_shrink() is called, not just on
35887 a successful shrink. This was causing significant memory bloat.
35888 - Fix buffer overflow when checking hashed passwords.
35889 - Security fix: if seeding the RNG on Win32 fails, quit.
35890 - Allow seeding the RNG on Win32 even when you're not running as
35892 - Disable threading on Solaris too. Something is wonky with it,
35893 cpuworkers, and reentrant libs.
35894 - Reenable the part of the code that tries to flush as soon as an
35895 OR outbuf has a full TLS record available. Perhaps this will make
35896 OR outbufs not grow as huge except in rare cases, thus saving lots
35897 of CPU time plus memory.
35898 - Reject malformed .onion addresses rather then passing them on as
35899 normal web requests.
35900 - Adapt patch from Adam Langley: fix possible memory leak in
35901 tor_lookup_hostname().
35902 - Initialize libevent later in the startup process, so the logs are
35903 already established by the time we start logging libevent warns.
35904 - Use correct errno on win32 if libevent fails.
35905 - Check and warn about known-bad/slow libevent versions.
35906 - Pay more attention to the ClientOnly config option.
35907 - Have torctl.in/tor.sh.in check for location of su binary (needed
35909 - Correct/add man page entries for LongLivedPorts, ExitPolicy,
35910 KeepalivePeriod, ClientOnly, NoPublish, HttpProxy, HttpsProxy,
35911 HttpProxyAuthenticator
35912 - Stop warning about sigpipes in the logs. We're going to
35913 pretend that getting these occasionally is normal and fine.
35914 - Resolve OS X installer bugs: stop claiming to be 0.0.9.2 in
35916 installer screens; and don't put stuff into StartupItems unless
35917 the user asks you to.
35918 - Require servers that use the default dirservers to have public IP
35919 addresses. We have too many servers that are configured with private
35920 IPs and their admins never notice the log entries complaining that
35921 their descriptors are being rejected.
35922 - Add OSX uninstall instructions. An actual uninstall script will
35926 Changes in version 0.1.0.8-rc - 2005-05-23
35928 - It turns out that kqueue on OS X 10.3.9 was causing kernel
35929 panics. Disable kqueue on all OS X Tors.
35930 - Fix RPM: remove duplicate line accidentally added to the rpm
35932 - Disable threads on openbsd too, since its gethostaddr is not
35934 - Tolerate libevent 0.8 since it still works, even though it's
35936 - Enable building on Red Hat 9.0 again.
35937 - Allow the middle hop of the testing circuit to be running any
35938 version, now that most of them have the bugfix to let them connect
35939 to unknown servers. This will allow reachability testing to work
35940 even when 0.0.9.7-0.0.9.9 become obsolete.
35941 - Handle relay cells with rh.length too large. This prevents
35942 a potential attack that could read arbitrary memory (maybe even
35943 keys) from the exit server's process.
35944 - We screwed up the dirport reachability testing when we don't yet
35945 have a cached version of the directory. Hopefully now fixed.
35946 - Clean up router_load_single_router() (used by the controller),
35947 so it doesn't seg fault on error.
35948 - Fix a minor memory leak when somebody establishes an introduction
35949 point at your Tor server.
35950 - If a socks connection ends because read fails, don't warn that
35951 you're not sending a socks reply back.
35954 - Add HttpProxyAuthenticator config option too, that works like
35955 the HttpsProxyAuthenticator config option.
35956 - Encode hashed controller passwords in hex instead of base64,
35957 to make it easier to write controllers.
35960 Changes in version 0.1.0.7-rc - 2005-05-17
35962 - Fix a bug in the OS X package installer that prevented it from
35963 installing on Tiger.
35964 - Fix a script bug in the OS X package installer that made it
35965 complain during installation.
35966 - Find libevent even if it's hiding in /usr/local/ and your
35967 CFLAGS and LDFLAGS don't tell you to look there.
35968 - Be able to link with libevent as a shared library (the default
35969 after 1.0d), even if it's hiding in /usr/local/lib and even
35970 if you haven't added /usr/local/lib to your /etc/ld.so.conf,
35971 assuming you're running gcc. Otherwise fail and give a useful
35973 - Fix a bug in the RPM packager: set home directory for _tor to
35974 something more reasonable when first installing.
35975 - Free a minor amount of memory that is still reachable on exit.
35978 Changes in version 0.1.0.6-rc - 2005-05-14
35980 - Implement --disable-threads configure option. Disable threads on
35981 netbsd by default, because it appears to have no reentrant resolver
35983 - Apple's OS X 10.4.0 ships with a broken kqueue. The new libevent
35984 release (1.1) detects and disables kqueue if it's broken.
35985 - Append default exit policy before checking for implicit internal
35986 addresses. Now we don't log a bunch of complaints on startup
35987 when using the default exit policy.
35988 - Some people were putting "Address " in their torrc, and they had
35989 a buggy resolver that resolved " " to 0.0.0.0. Oops.
35990 - If DataDir is ~/.tor, and that expands to /.tor, then default to
35991 LOCALSTATEDIR/tor instead.
35992 - Fix fragmented-message bug in TorControl.py.
35993 - Resolve a minor bug which would prevent unreachable dirports
35994 from getting suppressed in the published descriptor.
35995 - When the controller gave us a new descriptor, we weren't resolving
35996 it immediately, so Tor would think its address was 0.0.0.0 until
35997 we fetched a new directory.
35998 - Fix an uppercase/lowercase case error in suppressing a bogus
35999 libevent warning on some Linuxes.
36002 - Begin scrubbing sensitive strings from logs by default. Turn off
36003 the config option SafeLogging if you need to do debugging.
36004 - Switch to a new buffer management algorithm, which tries to avoid
36005 reallocing and copying quite as much. In first tests it looks like
36006 it uses *more* memory on average, but less cpu.
36007 - First cut at support for "create-fast" cells. Clients can use
36008 these when extending to their first hop, since the TLS already
36009 provides forward secrecy and authentication. Not enabled on
36011 - When dirservers refuse a router descriptor, we now log its
36012 contactinfo, platform, and the poster's IP address.
36013 - Call tor_free_all instead of connections_free_all after forking, to
36014 save memory on systems that need to fork.
36015 - Whine at you if you're a server and you don't set your contactinfo.
36016 - Implement --verify-config command-line option to check if your torrc
36017 is valid without actually launching Tor.
36018 - Rewrite address "serifos.exit" to "localhost.serifos.exit"
36019 rather than just rejecting it.
36022 Changes in version 0.1.0.5-rc - 2005-04-27
36024 - Stop trying to print a null pointer if an OR conn fails because
36025 we didn't like its cert.
36027 - Switch our internal buffers implementation to use a ring buffer,
36028 to hopefully improve performance for fast servers a lot.
36029 - Add HttpsProxyAuthenticator support (basic auth only), based
36030 on patch from Adam Langley.
36031 - Bump the default BandwidthRate from 1 MB to 2 MB, to accommodate
36032 the fast servers that have been joining lately.
36033 - Give hidden service accesses extra time on the first attempt,
36034 since 60 seconds is often only barely enough. This might improve
36036 - Improve performance for dirservers: stop re-parsing the whole
36037 directory every time you regenerate it.
36038 - Add more debugging info to help us find the weird dns freebsd
36039 pthreads bug; cleaner debug messages to help track future issues.
36042 Changes in version 0.0.9.9 - 2005-04-23
36043 o Bugfixes on 0.0.9.x:
36044 - If unofficial Tor clients connect and send weird TLS certs, our
36045 Tor server triggers an assert. This release contains a minimal
36046 backport from the broader fix that we put into 0.1.0.4-rc.
36049 Changes in version 0.1.0.4-rc - 2005-04-23
36051 - If unofficial Tor clients connect and send weird TLS certs, our
36052 Tor server triggers an assert. Stop asserting, and start handling
36053 TLS errors better in other situations too.
36054 - When the controller asks us to tell it about all the debug-level
36055 logs, it turns out we were generating debug-level logs while
36056 telling it about them, which turns into a bad loop. Now keep
36057 track of whether you're sending a debug log to the controller,
36058 and don't log when you are.
36059 - Fix the "postdescriptor" feature of the controller interface: on
36060 non-complete success, only say "done" once.
36062 - Clients are now willing to load balance over up to 2mB, not 1mB,
36063 of advertised bandwidth capacity.
36064 - Add a NoPublish config option, so you can be a server (e.g. for
36065 testing running Tor servers in other Tor networks) without
36066 publishing your descriptor to the primary dirservers.
36069 Changes in version 0.1.0.3-rc - 2005-04-08
36070 o Improvements on 0.1.0.2-rc:
36071 - Client now retries when streams end early for 'hibernating' or
36072 'resource limit' reasons, rather than failing them.
36073 - More automated handling for dirserver operators:
36074 - Automatically approve nodes running 0.1.0.2-rc or later,
36075 now that the the reachability detection stuff is working.
36076 - Now we allow two unverified servers with the same nickname
36077 but different keys. But if a nickname is verified, only that
36078 nickname+key are allowed.
36079 - If you're an authdirserver connecting to an address:port,
36080 and it's not the OR you were expecting, forget about that
36081 descriptor. If he *was* the one you were expecting, then forget
36082 about all other descriptors for that address:port.
36083 - Allow servers to publish descriptors from 12 hours in the future.
36084 Corollary: only whine about clock skew from the dirserver if
36085 he's a trusted dirserver (since now even verified servers could
36086 have quite wrong clocks).
36087 - Adjust maximum skew and age for rendezvous descriptors: let skew
36088 be 48 hours rather than 90 minutes.
36089 - Efficiency improvements:
36090 - Keep a big splay tree of (circid,orconn)->circuit mappings to make
36091 it much faster to look up a circuit for each relay cell.
36092 - Remove most calls to assert_all_pending_dns_resolves_ok(),
36093 since they're eating our cpu on exit nodes.
36094 - Stop wasting time doing a case insensitive comparison for every
36095 dns name every time we do any lookup. Canonicalize the names to
36096 lowercase and be done with it.
36097 - Start sending 'truncated' cells back rather than destroy cells,
36098 if the circuit closes in front of you. This means we won't have
36099 to abandon partially built circuits.
36100 - Only warn once per nickname from add_nickname_list_to_smartlist
36101 per failure, so an entrynode or exitnode choice that's down won't
36103 - Put a note in the torrc about abuse potential with the default
36105 - Revise control spec and implementation to allow all log messages to
36106 be sent to controller with their severities intact (suggested by
36107 Matt Edman). Update TorControl to handle new log event types.
36108 - Provide better explanation messages when controller's POSTDESCRIPTOR
36110 - Stop putting nodename in the Platform string in server descriptors.
36111 It doesn't actually help, and it is confusing/upsetting some people.
36113 o Bugfixes on 0.1.0.2-rc:
36114 - We were printing the host mask wrong in exit policies in server
36115 descriptors. This isn't a critical bug though, since we were still
36116 obeying the exit policy internally.
36117 - Fix Tor when compiled with libevent but without pthreads: move
36118 connection_unregister() from _connection_free() to
36120 - Fix an assert trigger (already fixed in 0.0.9.x): when we have
36121 the rare mysterious case of accepting a conn on 0.0.0.0:0, then
36122 when we look through the connection array, we'll find any of the
36123 cpu/dnsworkers. This is no good.
36125 o Bugfixes on 0.0.9.8:
36126 - Fix possible bug on threading platforms (e.g. win32) which was
36127 leaking a file descriptor whenever a cpuworker or dnsworker died.
36128 - When using preferred entry or exit nodes, ignore whether the
36129 circuit wants uptime or capacity. They asked for the nodes, they
36131 - chdir() to your datadirectory at the *end* of the daemonize process,
36132 not the beginning. This was a problem because the first time you
36133 run tor, if your datadir isn't there, and you have runasdaemon set
36134 to 1, it will try to chdir to it before it tries to create it. Oops.
36135 - Handle changed router status correctly when dirserver reloads
36136 fingerprint file. We used to be dropping all unverified descriptors
36137 right then. The bug was hidden because we would immediately
36138 fetch a directory from another dirserver, which would include the
36139 descriptors we just dropped.
36140 - When we're connecting to an OR and he's got a different nickname/key
36141 than we were expecting, only complain loudly if we're an OP or a
36142 dirserver. Complaining loudly to the OR admins just confuses them.
36143 - Tie MAX_DIR_SIZE to MAX_BUF_SIZE, so now directory sizes won't get
36144 artificially capped at 500kB.
36147 Changes in version 0.0.9.8 - 2005-04-07
36148 o Bugfixes on 0.0.9.x:
36149 - We have a bug that I haven't found yet. Sometimes, very rarely,
36150 cpuworkers get stuck in the 'busy' state, even though the cpuworker
36151 thinks of itself as idle. This meant that no new circuits ever got
36152 established. Here's a workaround to kill any cpuworker that's been
36153 busy for more than 100 seconds.
36156 Changes in version 0.1.0.2-rc - 2005-04-01
36157 o Bugfixes on 0.1.0.1-rc:
36158 - Fixes on reachability detection:
36159 - Don't check for reachability while hibernating.
36160 - If ORPort is reachable but DirPort isn't, still publish the
36161 descriptor, but zero out DirPort until it's found reachable.
36162 - When building testing circs for ORPort testing, use only
36163 high-bandwidth nodes, so fewer circuits fail.
36164 - Complain about unreachable ORPort separately from unreachable
36165 DirPort, so the user knows what's going on.
36166 - Make sure we only conclude ORPort reachability if we didn't
36167 initiate the conn. Otherwise we could falsely conclude that
36168 we're reachable just because we connected to the guy earlier
36169 and he used that same pipe to extend to us.
36170 - Authdirservers shouldn't do ORPort reachability detection,
36171 since they're in clique mode, so it will be rare to find a
36172 server not already connected to them.
36173 - When building testing circuits, always pick middle hops running
36174 Tor 0.0.9.7, so we avoid the "can't extend to unknown routers"
36175 bug. (This is a kludge; it will go away when 0.0.9.x becomes
36177 - When we decide we're reachable, actually publish our descriptor
36179 - Fix bug in redirectstream in the controller.
36180 - Fix the state descriptor strings so logs don't claim edge streams
36181 are in a different state than they actually are.
36182 - Use recent libevent features when possible (this only really affects
36183 win32 and osx right now, because the new libevent with these
36184 features hasn't been released yet). Add code to suppress spurious
36186 - Prevent possible segfault in connection_close_unattached_ap().
36187 - Fix newlines on torrc in win32.
36188 - Improve error msgs when tor-resolve fails.
36190 o Improvements on 0.0.9.x:
36191 - New experimental script tor/contrib/ExerciseServer.py (needs more
36192 work) that uses the controller interface to build circuits and
36193 fetch pages over them. This will help us bootstrap servers that
36194 have lots of capacity but haven't noticed it yet.
36195 - New experimental script tor/contrib/PathDemo.py (needs more work)
36196 that uses the controller interface to let you choose whole paths
36198 "<hostname>.<path,separated by dots>.<length of path>.path"
36199 - When we've connected to an OR and handshaked but didn't like
36200 the result, we were closing the conn without sending destroy
36201 cells back for pending circuits. Now send those destroys.
36204 Changes in version 0.0.9.7 - 2005-04-01
36205 o Bugfixes on 0.0.9.x:
36206 - Fix another race crash bug (thanks to Glenn Fink for reporting).
36207 - Compare identity to identity, not to nickname, when extending to
36208 a router not already in the directory. This was preventing us from
36209 extending to unknown routers. Oops.
36210 - Make sure to create OS X Tor user in <500 range, so we aren't
36211 creating actual system users.
36212 - Note where connection-that-hasn't-sent-end was marked, and fix
36213 a few really loud instances of this harmless bug (it's fixed more
36217 Changes in version 0.1.0.1-rc - 2005-03-28
36219 - Add reachability testing. Your Tor server will automatically try
36220 to see if its ORPort and DirPort are reachable from the outside,
36221 and it won't upload its descriptor until it decides they are.
36222 - Handle unavailable hidden services better. Handle slow or busy
36223 hidden services better.
36224 - Add support for CONNECTing through https proxies, with "HttpsProxy"
36226 - New exit policy: accept most low-numbered ports, rather than
36227 rejecting most low-numbered ports.
36228 - More Tor controller support (still experimental). See
36229 http://tor.eff.org/doc/control-spec.txt for all the new features,
36230 including signals to emulate unix signals from any platform;
36231 redirectstream; extendcircuit; mapaddress; getinfo; postdescriptor;
36232 closestream; closecircuit; etc.
36233 - Make nt services work and start on startup on win32 (based on
36234 patch by Matt Edman).
36235 - Add a new AddressMap config directive to rewrite incoming socks
36236 addresses. This lets you, for example, declare an implicit
36237 required exit node for certain sites.
36238 - Add a new TrackHostExits config directive to trigger addressmaps
36239 for certain incoming socks addresses -- for sites that break when
36240 your exit keeps changing (based on patch by Mike Perry).
36241 - Redo the client-side dns cache so it's just an addressmap too.
36242 - Notice when our IP changes, and reset stats/uptime/reachability.
36243 - When an application is using socks5, give him the whole variety of
36244 potential socks5 responses (connect refused, host unreachable, etc),
36245 rather than just "success" or "failure".
36246 - A more sane version numbering system. See
36247 http://tor.eff.org/cvs/tor/doc/version-spec.txt for details.
36248 - New contributed script "exitlist": a simple python script to
36249 parse directories and find Tor nodes that exit to listed
36251 - New contributed script "privoxy-tor-toggle" to toggle whether
36252 Privoxy uses Tor. Seems to be configured for Debian by default.
36253 - Report HTTP reasons to client when getting a response from directory
36254 servers -- so you can actually know what went wrong.
36255 - New config option MaxAdvertisedBandwidth which lets you advertise
36256 a low bandwidthrate (to not attract as many circuits) while still
36257 allowing a higher bandwidthrate in reality.
36259 o Robustness/stability fixes:
36260 - Make Tor use Niels Provos's libevent instead of its current
36261 poll-but-sometimes-select mess. This will let us use faster async
36262 cores (like epoll, kpoll, and /dev/poll), and hopefully work better
36264 - pthread support now too. This was forced because when we forked,
36265 we ended up wasting a lot of duplicate ram over time. Also switch
36266 to foo_r versions of some library calls to allow reentry and
36268 - Better handling for heterogeneous / unreliable nodes:
36269 - Annotate circuits w/ whether they aim to contain high uptime nodes
36270 and/or high capacity nodes. When building circuits, choose
36272 - This means that every single node in an intro rend circuit,
36273 not just the last one, will have a minimum uptime.
36274 - New config option LongLivedPorts to indicate application streams
36275 that will want high uptime circuits.
36276 - Servers reset uptime when a dir fetch entirely fails. This
36277 hopefully reflects stability of the server's network connectivity.
36278 - If somebody starts his tor server in Jan 2004 and then fixes his
36279 clock, don't make his published uptime be a year.
36280 - Reset published uptime when you wake up from hibernation.
36281 - Introduce a notion of 'internal' circs, which are chosen without
36282 regard to the exit policy of the last hop. Intro and rendezvous
36283 circs must be internal circs, to avoid leaking information. Resolve
36284 and connect streams can use internal circs if they want.
36285 - New circuit pooling algorithm: make sure to have enough circs around
36286 to satisfy any predicted ports, and also make sure to have 2 internal
36287 circs around if we've required internal circs lately (and with high
36288 uptime if we've seen that lately too).
36289 - Split NewCircuitPeriod option into NewCircuitPeriod (30 secs),
36290 which describes how often we retry making new circuits if current
36291 ones are dirty, and MaxCircuitDirtiness (10 mins), which describes
36292 how long we're willing to make use of an already-dirty circuit.
36293 - Cannibalize GENERAL circs to be C_REND, C_INTRO, S_INTRO, and S_REND
36294 circ as necessary, if there are any completed ones lying around
36295 when we try to launch one.
36296 - Make hidden services try to establish a rendezvous for 30 seconds,
36297 rather than for n (where n=3) attempts to build a circuit.
36298 - Change SHUTDOWN_WAIT_LENGTH from a fixed 30 secs to a config option
36299 "ShutdownWaitLength".
36300 - Try to be more zealous about calling connection_edge_end when
36301 things go bad with edge conns in connection.c.
36302 - Revise tor-spec to add more/better stream end reasons.
36303 - Revise all calls to connection_edge_end to avoid sending "misc",
36304 and to take errno into account where possible.
36307 - Fix a race condition that can trigger an assert, when we have a
36308 pending create cell and an OR connection fails right then.
36309 - Fix several double-mark-for-close bugs, e.g. where we were finding
36310 a conn for a cell even if that conn is already marked for close.
36311 - Make sequence of log messages when starting on win32 with no config
36312 file more reasonable.
36313 - When choosing an exit node for a new non-internal circ, don't take
36314 into account whether it'll be useful for any pending x.onion
36315 addresses -- it won't.
36316 - Turn addr_policy_compare from a tristate to a quadstate; this should
36317 help address our "Ah, you allow 1.2.3.4:80. You are a good choice
36318 for google.com" problem.
36319 - Make "platform" string in descriptor more accurate for Win32 servers,
36320 so it's not just "unknown platform".
36321 - Fix an edge case in parsing config options (thanks weasel).
36322 If they say "--" on the commandline, it's not an option.
36323 - Reject odd-looking addresses at the client (e.g. addresses that
36324 contain a colon), rather than having the server drop them because
36326 - tor-resolve requests were ignoring .exit if there was a working circuit
36327 they could use instead.
36328 - REUSEADDR on normal platforms means you can rebind to the port
36329 right after somebody else has let it go. But REUSEADDR on win32
36330 means to let you bind to the port _even when somebody else
36331 already has it bound_! So, don't do that on Win32.
36332 - Change version parsing logic: a version is "obsolete" if it is not
36333 recommended and (1) there is a newer recommended version in the
36334 same series, or (2) there are no recommended versions in the same
36335 series, but there are some recommended versions in a newer series.
36336 A version is "new" if it is newer than any recommended version in
36338 - Stop most cases of hanging up on a socks connection without sending
36342 - Require BandwidthRate to be at least 20kB/s for servers.
36343 - When a dirserver causes you to give a warn, mention which dirserver
36345 - New config option DirAllowPrivateAddresses for authdirservers.
36346 Now by default they refuse router descriptors that have non-IP or
36347 private-IP addresses.
36348 - Stop publishing socksport in the directory, since it's not
36349 actually meant to be public. For compatibility, publish a 0 there
36351 - Change DirFetchPeriod/StatusFetchPeriod to have a special "Be
36352 smart" value, that is low for servers and high for clients.
36353 - If our clock jumps forward by 100 seconds or more, assume something
36354 has gone wrong with our network and abandon all not-yet-used circs.
36355 - Warn when exit policy implicitly allows local addresses.
36356 - If we get an incredibly skewed timestamp from a dirserver mirror
36357 that isn't a verified OR, don't warn -- it's probably him that's
36359 - Since we ship our own Privoxy on OS X, tweak it so it doesn't write
36360 cookies to disk and doesn't log each web request to disk. (Thanks
36361 to Brett Carrington for pointing this out.)
36362 - When a client asks us for a dir mirror and we don't have one,
36363 launch an attempt to get a fresh one.
36364 - If we're hibernating and we get a SIGINT, exit immediately.
36365 - Add --with-dmalloc ./configure option, to track memory leaks.
36366 - And try to free all memory on closing, so we can detect what
36368 - Cache local dns resolves correctly even when they're .exit
36370 - Give a better warning when some other server advertises an
36371 ORPort that is actually an apache running ssl.
36372 - Add "opt hibernating 1" to server descriptor to make it clearer
36373 whether the server is hibernating.
36376 Changes in version 0.0.9.6 - 2005-03-24
36377 o Bugfixes on 0.0.9.x (crashes and asserts):
36378 - Add new end stream reasons to maintenance branch. Fix bug where
36379 reason (8) could trigger an assert. Prevent bug from recurring.
36380 - Apparently win32 stat wants paths to not end with a slash.
36381 - Fix assert triggers in assert_cpath_layer_ok(), where we were
36382 blowing away the circuit that conn->cpath_layer points to, then
36383 checking to see if the circ is well-formed. Backport check to make
36384 sure we dont use the cpath on a closed connection.
36385 - Prevent circuit_resume_edge_reading_helper() from trying to package
36386 inbufs for marked-for-close streams.
36387 - Don't crash on hup if your options->address has become unresolvable.
36388 - Some systems (like OS X) sometimes accept() a connection and tell
36389 you the remote host is 0.0.0.0:0. If this happens, due to some
36390 other mis-features, we get confused; so refuse the conn for now.
36392 o Bugfixes on 0.0.9.x (other):
36393 - Fix harmless but scary "Unrecognized content encoding" warn message.
36394 - Add new stream error reason: TORPROTOCOL reason means "you are not
36395 speaking a version of Tor I understand; say bye-bye to your stream."
36396 - Be willing to cache directories from up to ROUTER_MAX_AGE seconds
36397 into the future, now that we are more tolerant of skew. This
36398 resolves a bug where a Tor server would refuse to cache a directory
36399 because all the directories it gets are too far in the future;
36400 yet the Tor server never logs any complaints about clock skew.
36401 - Mac packaging magic: make man pages useable, and do not overwrite
36402 existing torrc files.
36403 - Make OS X log happily to /var/log/tor/tor.log
36406 Changes in version 0.0.9.5 - 2005-02-22
36407 o Bugfixes on 0.0.9.x:
36408 - Fix an assert race at exit nodes when resolve requests fail.
36409 - Stop picking unverified dir mirrors--it only leads to misery.
36410 - Patch from Matt Edman to make NT services work better. Service
36411 support is still not compiled into the executable by default.
36412 - Patch from Dmitri Bely so the Tor service runs better under
36413 the win32 SYSTEM account.
36414 - Make tor-resolve actually work (?) on Win32.
36415 - Fix a sign bug when getrlimit claims to have 4+ billion
36416 file descriptors available.
36417 - Stop refusing to start when bandwidthburst == bandwidthrate.
36418 - When create cells have been on the onion queue more than five
36419 seconds, just send back a destroy and take them off the list.
36422 Changes in version 0.0.9.4 - 2005-02-03
36423 o Bugfixes on 0.0.9:
36424 - Fix an assert bug that took down most of our servers: when
36425 a server claims to have 1 GB of bandwidthburst, don't
36427 - Don't crash as badly if we have spawned the max allowed number
36428 of dnsworkers, or we're out of file descriptors.
36429 - Block more file-sharing ports in the default exit policy.
36430 - MaxConn is now automatically set to the hard limit of max
36431 file descriptors we're allowed (ulimit -n), minus a few for
36433 - Give a clearer message when servers need to raise their
36434 ulimit -n when they start running out of file descriptors.
36435 - SGI Compatibility patches from Jan Schaumann.
36436 - Tolerate a corrupt cached directory better.
36437 - When a dirserver hasn't approved your server, list which one.
36438 - Go into soft hibernation after 95% of the bandwidth is used,
36439 not 99%. This is especially important for daily hibernators who
36440 have a small accounting max. Hopefully it will result in fewer
36441 cut connections when the hard hibernation starts.
36442 - Load-balance better when using servers that claim more than
36443 800kB/s of capacity.
36444 - Make NT services work (experimental, only used if compiled in).
36447 Changes in version 0.0.9.3 - 2005-01-21
36448 o Bugfixes on 0.0.9:
36449 - Backport the cpu use fixes from main branch, so busy servers won't
36450 need as much processor time.
36451 - Work better when we go offline and then come back, or when we
36452 run Tor at boot before the network is up. We do this by
36453 optimistically trying to fetch a new directory whenever an
36454 application request comes in and we think we're offline -- the
36455 human is hopefully a good measure of when the network is back.
36456 - Backport some minimal hidserv bugfixes: keep rend circuits open as
36457 long as you keep using them; actually publish hidserv descriptors
36458 shortly after they change, rather than waiting 20-40 minutes.
36459 - Enable Mac startup script by default.
36460 - Fix duplicate dns_cancel_pending_resolve reported by Giorgos Pallas.
36461 - When you update AllowUnverifiedNodes or FirewallPorts via the
36462 controller's setconf feature, we were always appending, never
36464 - When you update HiddenServiceDir via setconf, it was screwing up
36465 the order of reading the lines, making it fail.
36466 - Do not rewrite a cached directory back to the cache; otherwise we
36467 will think it is recent and not fetch a newer one on startup.
36468 - Workaround for webservers that lie about Content-Encoding: Tor
36469 now tries to autodetect compressed directories and compression
36470 itself. This lets us Proxypass dir fetches through apache.
36473 Changes in version 0.0.9.2 - 2005-01-04
36474 o Bugfixes on 0.0.9 (crashes and asserts):
36475 - Fix an assert on startup when the disk is full and you're logging
36477 - If you do socks4 with an IP of 0.0.0.x but *don't* provide a socks4a
36478 style address, then we'd crash.
36479 - Fix an assert trigger when the running-routers string we get from
36480 a dirserver is broken.
36481 - Make worker threads start and run on win32. Now win32 servers
36483 - Bandaid (not actually fix, but now it doesn't crash) an assert
36484 where the dns worker dies mysteriously and the main Tor process
36485 doesn't remember anything about the address it was resolving.
36487 o Bugfixes on 0.0.9 (Win32):
36488 - Workaround for brain-damaged __FILE__ handling on MSVC: keep Nick's
36489 name out of the warning/assert messages.
36490 - Fix a superficial "unhandled error on read" bug on win32.
36491 - The win32 installer no longer requires a click-through for our
36492 license, since our Free Software license grants rights but does not
36494 - Win32: When connecting to a dirserver fails, try another one
36495 immediately. (This was already working for non-win32 Tors.)
36496 - Stop trying to parse $HOME on win32 when hunting for default
36498 - Make tor-resolve.c work on win32 by calling network_init().
36500 o Bugfixes on 0.0.9 (other):
36501 - Make 0.0.9.x build on Solaris again.
36502 - Due to a fencepost error, we were blowing away the \n when reporting
36503 confvalue items in the controller. So asking for multiple config
36504 values at once couldn't work.
36505 - When listing circuits that are pending on an opening OR connection,
36506 if we're an OR we were listing circuits that *end* at us as
36507 being pending on every listener, dns/cpu worker, etc. Stop that.
36508 - Dirservers were failing to create 'running-routers' or 'directory'
36509 strings if we had more than some threshold of routers. Fix them so
36510 they can handle any number of routers.
36511 - Fix a superficial "Duplicate mark for close" bug.
36512 - Stop checking for clock skew for OR connections, even for servers.
36513 - Fix a fencepost error that was chopping off the last letter of any
36514 nickname that is the maximum allowed nickname length.
36515 - Update URLs in log messages so they point to the new website.
36516 - Fix a potential problem in mangling server private keys while
36517 writing to disk (not triggered yet, as far as we know).
36518 - Include the licenses for other free software we include in Tor,
36519 now that we're shipping binary distributions more regularly.
36522 Changes in version 0.0.9.1 - 2004-12-15
36523 o Bugfixes on 0.0.9:
36524 - Make hibernation actually work.
36525 - Make HashedControlPassword config option work.
36526 - When we're reporting event circuit status to a controller,
36527 don't use the stream status code.
36530 Changes in version 0.0.9 - 2004-12-12
36532 - Clean up manpage and torrc.sample file.
36533 - Clean up severities and text of log warnings.
36535 - Make servers trigger an assert when they enter hibernation.
36538 Changes in version 0.0.9rc7 - 2004-12-08
36539 o Bugfixes on 0.0.9rc:
36540 - Fix a stack-trashing crash when an exit node begins hibernating.
36541 - Avoid looking at unallocated memory while considering which
36542 ports we need to build circuits to cover.
36543 - Stop a sigpipe: when an 'end' cell races with eof from the app,
36544 we shouldn't hold-open-until-flush if the eof arrived first.
36545 - Fix a bug with init_cookie_authentication() in the controller.
36546 - When recommending new-format log lines, if the upper bound is
36547 LOG_ERR, leave it implicit.
36549 o Bugfixes on 0.0.8.1:
36550 - Fix a whole slew of memory leaks.
36551 - Fix isspace() and friends so they still make Solaris happy
36552 but also so they don't trigger asserts on win32.
36553 - Fix parse_iso_time on platforms without strptime (eg win32).
36554 - win32: tolerate extra "readable" events better.
36555 - win32: when being multithreaded, leave parent fdarray open.
36556 - Make unit tests work on win32.
36559 Changes in version 0.0.9rc6 - 2004-12-06
36560 o Bugfixes on 0.0.9pre:
36561 - Clean up some more integer underflow opportunities (not exploitable
36563 - While hibernating, hup should not regrow our listeners.
36564 - Send an end to the streams we close when we hibernate, rather
36565 than just chopping them off.
36566 - React to eof immediately on non-open edge connections.
36568 o Bugfixes on 0.0.8.1:
36569 - Calculate timeout for waiting for a connected cell from the time
36570 we sent the begin cell, not from the time the stream started. If
36571 it took a long time to establish the circuit, we would time out
36572 right after sending the begin cell.
36573 - Fix router_compare_addr_to_addr_policy: it was not treating a port
36574 of * as always matching, so we were picking reject *:* nodes as
36575 exit nodes too. Oops.
36578 - New circuit building strategy: keep a list of ports that we've
36579 used in the past 6 hours, and always try to have 2 circuits open
36580 or on the way that will handle each such port. Seed us with port
36581 80 so web users won't complain that Tor is "slow to start up".
36582 - Make kill -USR1 dump more useful stats about circuits.
36583 - When warning about retrying or giving up, print the address, so
36584 the user knows which one it's talking about.
36585 - If you haven't used a clean circuit in an hour, throw it away,
36586 just to be on the safe side. (This means after 6 hours a totally
36587 unused Tor client will have no circuits open.)
36590 Changes in version 0.0.9rc5 - 2004-12-01
36591 o Bugfixes on 0.0.8.1:
36592 - Disallow NDEBUG. We don't ever want anybody to turn off debug.
36593 - Let resolve conns retry/expire also, rather than sticking around
36595 - If we are using select, make sure we stay within FD_SETSIZE.
36597 o Bugfixes on 0.0.9pre:
36598 - Fix integer underflow in tor_vsnprintf() that may be exploitable,
36599 but doesn't seem to be currently; thanks to Ilja van Sprundel for
36601 - If anybody set DirFetchPostPeriod, give them StatusFetchPeriod
36602 instead. Impose minima and maxima for all *Period options; impose
36603 even tighter maxima for fetching if we are a caching dirserver.
36604 Clip rather than rejecting.
36605 - Fetch cached running-routers from servers that serve it (that is,
36606 authdirservers and servers running 0.0.9rc5-cvs or later.)
36609 - Accept *:706 (silc) in default exit policy.
36610 - Implement new versioning format for post 0.1.
36611 - Support "foo.nickname.exit" addresses, to let Alice request the
36612 address "foo" as viewed by exit node "nickname". Based on a patch
36614 - Make tor --version --version dump the cvs Id of every file.
36617 Changes in version 0.0.9rc4 - 2004-11-28
36618 o Bugfixes on 0.0.8.1:
36619 - Make windows sockets actually non-blocking (oops), and handle
36620 win32 socket errors better.
36622 o Bugfixes on 0.0.9rc1:
36623 - Actually catch the -USR2 signal.
36626 Changes in version 0.0.9rc3 - 2004-11-25
36627 o Bugfixes on 0.0.8.1:
36628 - Flush the log file descriptor after we print "Tor opening log file",
36629 so we don't see those messages days later.
36631 o Bugfixes on 0.0.9rc1:
36632 - Make tor-resolve work again.
36633 - Avoid infinite loop in tor-resolve if tor hangs up on it.
36634 - Fix an assert trigger for clients/servers handling resolves.
36637 Changes in version 0.0.9rc2 - 2004-11-24
36638 o Bugfixes on 0.0.9rc1:
36639 - I broke socks5 support while fixing the eof bug.
36640 - Allow unitless bandwidths and intervals; they default to bytes
36642 - New servers don't start out hibernating; they are active until
36643 they run out of bytes, so they have a better estimate of how
36644 long it takes, and so their operators can know they're working.
36647 Changes in version 0.0.9rc1 - 2004-11-23
36648 o Bugfixes on 0.0.8.1:
36649 - Finally fix a bug that's been plaguing us for a year:
36650 With high load, circuit package window was reaching 0. Whenever
36651 we got a circuit-level sendme, we were reading a lot on each
36652 socket, but only writing out a bit. So we would eventually reach
36653 eof. This would be noticed and acted on even when there were still
36654 bytes sitting in the inbuf.
36655 - When poll() is interrupted, we shouldn't believe the revents values.
36657 o Bugfixes on 0.0.9pre6:
36658 - Fix hibernate bug that caused pre6 to be broken.
36659 - Don't keep rephist info for routers that haven't had activity for
36660 24 hours. (This matters now that clients have keys, since we track
36662 - Never call close_temp_logs while validating log options.
36663 - Fix backslash-escaping on tor.sh.in and torctl.in.
36666 - Implement weekly/monthly/daily accounting: now you specify your
36667 hibernation properties by
36668 AccountingMax N bytes|KB|MB|GB|TB
36669 AccountingStart day|week|month [day] HH:MM
36670 Defaults to "month 1 0:00".
36671 - Let bandwidth and interval config options be specified as 5 bytes,
36672 kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.
36673 - kill -USR2 now moves all logs to loglevel debug (kill -HUP to
36674 get back to normal.)
36675 - If your requested entry or exit node has advertised bandwidth 0,
36677 - Be more greedy about filling up relay cells -- we try reading again
36678 once we've processed the stuff we read, in case enough has arrived
36679 to fill the last cell completely.
36680 - Apply NT service patch from Osamu Fujino. Still needs more work.
36683 Changes in version 0.0.9pre6 - 2004-11-15
36684 o Bugfixes on 0.0.8.1:
36685 - Fix assert failure on malformed socks4a requests.
36686 - Use identity comparison, not nickname comparison, to choose which
36687 half of circuit-ID-space each side gets to use. This is needed
36688 because sometimes we think of a router as a nickname, and sometimes
36689 as a hex ID, and we can't predict what the other side will do.
36690 - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our
36691 write() call will fail and we handle it there.
36692 - Add a FAST_SMARTLIST define to optionally inline smartlist_get
36693 and smartlist_len, which are two major profiling offenders.
36695 o Bugfixes on 0.0.9pre5:
36696 - Fix a bug in read_all that was corrupting config files on windows.
36697 - When we're raising the max number of open file descriptors to
36698 'unlimited', don't log that we just raised it to '-1'.
36699 - Include event code with events, as required by control-spec.txt.
36700 - Don't give a fingerprint when clients do --list-fingerprint:
36701 it's misleading, because it will never be the same again.
36702 - Stop using strlcpy in tor_strndup, since it was slowing us
36704 - Remove warn on startup about missing cached-directory file.
36705 - Make kill -USR1 work again.
36706 - Hibernate if we start tor during the "wait for wakeup-time" phase
36707 of an accounting interval. Log our hibernation plans better.
36708 - Authoritative dirservers now also cache their directory, so they
36709 have it on start-up.
36712 - Fetch running-routers; cache running-routers; compress
36713 running-routers; serve compressed running-routers.z
36714 - Add NSI installer script contributed by J Doe.
36715 - Commit VC6 and VC7 workspace/project files.
36716 - Commit a tor.spec for making RPM files, with help from jbash.
36717 - Add contrib/torctl.in contributed by Glenn Fink.
36718 - Implement the control-spec's SAVECONF command, to write your
36719 configuration to torrc.
36720 - Get cookie authentication for the controller closer to working.
36721 - Include control-spec.txt in the tarball.
36722 - When set_conf changes our server descriptor, upload a new copy.
36723 But don't upload it too often if there are frequent changes.
36724 - Document authentication config in man page, and document signals
36726 - Clean up confusing parts of man page and torrc.sample.
36727 - Make expand_filename handle ~ and ~username.
36728 - Use autoconf to enable largefile support where necessary. Use
36729 ftello where available, since ftell can fail at 2GB.
36730 - Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can
36731 log more informatively.
36732 - Give a slightly more useful output for "tor -h".
36733 - Refuse application socks connections to port 0.
36734 - Check clock skew for verified servers, but allow unverified
36735 servers and clients to have any clock skew.
36736 - Break DirFetchPostPeriod into:
36737 - DirFetchPeriod for fetching full directory,
36738 - StatusFetchPeriod for fetching running-routers,
36739 - DirPostPeriod for posting server descriptor,
36740 - RendPostPeriod for posting hidden service descriptors.
36741 - Make sure the hidden service descriptors are at a random offset
36742 from each other, to hinder linkability.
36745 Changes in version 0.0.9pre5 - 2004-11-09
36746 o Bugfixes on 0.0.9pre4:
36747 - Fix a seg fault in unit tests (doesn't affect main program).
36748 - Fix an assert bug where a hidden service provider would fail if
36749 the first hop of his rendezvous circuit was down.
36750 - Hidden service operators now correctly handle version 1 style
36751 INTRODUCE1 cells (nobody generates them still, so not a critical
36753 - If do_hup fails, actually notice.
36754 - Handle more errnos from accept() without closing the listener.
36755 Some OpenBSD machines were closing their listeners because
36756 they ran out of file descriptors.
36757 - Send resolve cells to exit routers that are running a new
36758 enough version of the resolve code to work right.
36759 - Better handling of winsock includes on non-MSV win32 compilers.
36760 - Some people had wrapped their tor client/server in a script
36761 that would restart it whenever it died. This did not play well
36762 with our "shut down if your version is obsolete" code. Now people
36763 don't fetch a new directory if their local cached version is
36765 - Make our autogen.sh work on ksh as well as bash.
36768 - Hibernation: New config option "AccountingMaxKB" lets you
36769 set how many KBytes per month you want to allow your server to
36770 consume. Rather than spreading those bytes out evenly over the
36771 month, we instead hibernate for some of the month and pop up
36772 at a deterministic time, work until the bytes are consumed, then
36773 hibernate again. Config option "MonthlyAccountingStart" lets you
36774 specify which day of the month your billing cycle starts on.
36775 - Control interface: a separate program can now talk to your
36776 client/server over a socket, and get/set config options, receive
36777 notifications of circuits and streams starting/finishing/dying,
36778 bandwidth used, etc. The next step is to get some GUIs working.
36779 Let us know if you want to help out. See doc/control-spec.txt .
36780 - Ship a contrib/tor-control.py as an example script to interact
36781 with the control port.
36782 - "tor --hash-password zzyxz" will output a salted password for
36783 use in authenticating to the control interface.
36784 - New log format in config:
36785 "Log minsev[-maxsev] stdout|stderr|syslog" or
36786 "Log minsev[-maxsev] file /var/foo"
36789 - DirPolicy config option, to let people reject incoming addresses
36790 from their dirserver.
36791 - "tor --list-fingerprint" will list your identity key fingerprint
36793 - Add "pass" target for RedirectExit, to make it easier to break
36794 out of a sequence of RedirectExit rules.
36795 - Clients now generate a TLS cert too, in preparation for having
36796 them act more like real nodes.
36797 - Ship src/win32/ in the tarball, so people can use it to build.
36798 - Make old win32 fall back to CWD if SHGetSpecialFolderLocation
36800 - New "router-status" line in directory, to better bind each verified
36801 nickname to its identity key.
36802 - Deprecate unofficial config option abbreviations, and abbreviations
36803 not on the command line.
36804 - Add a pure-C tor-resolve implementation.
36805 - Use getrlimit and friends to ensure we can reach MaxConn (currently
36806 1024) file descriptors.
36808 o Code security improvements, inspired by Ilja:
36809 - Replace sprintf with snprintf. (I think they were all safe, but
36811 - Replace strcpy/strncpy with strlcpy in more places.
36812 - Avoid strcat; use snprintf or strlcat instead.
36813 - snprintf wrapper with consistent (though not C99) overflow behavior.
36816 Changes in version 0.0.9pre4 - 2004-10-17
36817 o Bugfixes on 0.0.9pre3:
36818 - If the server doesn't specify an exit policy, use the real default
36819 exit policy, not reject *:*.
36820 - Ignore fascistfirewall when uploading/downloading hidden service
36821 descriptors, since we go through Tor for those; and when using
36822 an HttpProxy, since we assume it can reach them all.
36823 - When looking for an authoritative dirserver, use only the ones
36824 configured at boot. Don't bother looking in the directory.
36825 - The rest of the fix for get_default_conf_file() on older win32.
36826 - Make 'Routerfile' config option obsolete.
36829 - New 'MyFamily nick1,...' config option for a server to
36830 specify other servers that shouldn't be used in the same circuit
36831 with it. Only believed if nick1 also specifies us.
36832 - New 'NodeFamily nick1,nick2,...' config option for a client to
36833 specify nodes that it doesn't want to use in the same circuit.
36834 - New 'Redirectexit pattern address:port' config option for a
36835 server to redirect exit connections, e.g. to a local squid.
36838 Changes in version 0.0.9pre3 - 2004-10-13
36839 o Bugfixes on 0.0.8.1:
36840 - Better torrc example lines for dirbindaddress and orbindaddress.
36841 - Improved bounds checking on parsed ints (e.g. config options and
36842 the ones we find in directories.)
36843 - Better handling of size_t vs int, so we're more robust on 64
36845 - Fix the rest of the bug where a newly started OR would appear
36846 as unverified even after we've added his fingerprint and hupped
36848 - Fix a bug from 0.0.7: when read() failed on a stream, we would
36849 close it without sending back an end. So 'connection refused'
36850 would simply be ignored and the user would get no response.
36852 o Bugfixes on 0.0.9pre2:
36853 - Serving the cached-on-disk directory to people is bad. We now
36854 provide no directory until we've fetched a fresh one.
36855 - Workaround for bug on windows where cached-directories get crlf
36857 - Make get_default_conf_file() work on older windows too.
36858 - If we write a *:* exit policy line in the descriptor, don't write
36859 any more exit policy lines.
36862 - Use only 0.0.9pre1 and later servers for resolve cells.
36863 - Make the dirservers file obsolete.
36864 - Include a dir-signing-key token in directories to tell the
36865 parsing entity which key is being used to sign.
36866 - Remove the built-in bulky default dirservers string.
36867 - New config option "Dirserver %s:%d [fingerprint]", which can be
36868 repeated as many times as needed. If no dirservers specified,
36869 default to moria1,moria2,tor26.
36870 - Make moria2 advertise a dirport of 80, so people behind firewalls
36871 will be able to get a directory.
36872 - Http proxy support
36873 - Dirservers translate requests for http://%s:%d/x to /x
36874 - You can specify "HttpProxy %s[:%d]" and all dir fetches will
36875 be routed through this host.
36876 - Clients ask for /tor/x rather than /x for new enough dirservers.
36877 This way we can one day coexist peacefully with apache.
36878 - Clients specify a "Host: %s%d" http header, to be compatible
36879 with more proxies, and so running squid on an exit node can work.
36882 Changes in version 0.0.8.1 - 2004-10-13
36884 - Fix a seg fault that can be triggered remotely for Tor
36885 clients/servers with an open dirport.
36886 - Fix a rare assert trigger, where routerinfos for entries in
36887 our cpath would expire while we're building the path.
36888 - Fix a bug in OutboundBindAddress so it (hopefully) works.
36889 - Fix a rare seg fault for people running hidden services on
36890 intermittent connections.
36891 - Fix a bug in parsing opt keywords with objects.
36892 - Fix a stale pointer assert bug when a stream detaches and
36894 - Fix a string format vulnerability (probably not exploitable)
36895 in reporting stats locally.
36896 - Fix an assert trigger: sometimes launching circuits can fail
36897 immediately, e.g. because too many circuits have failed recently.
36898 - Fix a compile warning on 64 bit platforms.
36901 Changes in version 0.0.9pre2 - 2004-10-03
36903 - Make fetching a cached directory work for 64-bit platforms too.
36904 - Make zlib.h a required header, not an optional header.
36907 Changes in version 0.0.9pre1 - 2004-10-01
36909 - Stop using separate defaults for no-config-file and
36910 empty-config-file. Now you have to explicitly turn off SocksPort,
36911 if you don't want it open.
36912 - Fix a bug in OutboundBindAddress so it (hopefully) works.
36913 - Improve man page to mention more of the 0.0.8 features.
36914 - Fix a rare seg fault for people running hidden services on
36915 intermittent connections.
36916 - Change our file IO stuff (especially wrt OpenSSL) so win32 is
36918 - Fix more dns related bugs: send back resolve_failed and end cells
36919 more reliably when the resolve fails, rather than closing the
36920 circuit and then trying to send the cell. Also attach dummy resolve
36921 connections to a circuit *before* calling dns_resolve(), to fix
36922 a bug where cached answers would never be sent in RESOLVED cells.
36923 - When we run out of disk space, or other log writing error, don't
36924 crash. Just stop logging to that log and continue.
36925 - We were starting to daemonize before we opened our logs, so if
36926 there were any problems opening logs, we would complain to stderr,
36927 which wouldn't work, and then mysteriously exit.
36928 - Fix a rare bug where sometimes a verified OR would connect to us
36929 before he'd uploaded his descriptor, which would cause us to
36930 assign conn->nickname as though he's unverified. Now we look through
36931 the fingerprint list to see if he's there.
36932 - Fix a rare assert trigger, where routerinfos for entries in
36933 our cpath would expire while we're building the path.
36936 - Clients can ask dirservers for /dir.z to get a compressed version
36937 of the directory. Only works for servers running 0.0.9, of course.
36938 - Make clients cache directories and use them to seed their router
36939 lists at startup. This means clients have a datadir again.
36940 - Configuration infrastructure support for warning on obsolete
36942 - Respond to content-encoding headers by trying to uncompress as
36944 - Reply with a deflated directory when a client asks for "dir.z".
36945 We could use allow-encodings instead, but allow-encodings isn't
36946 specified in HTTP 1.0.
36947 - Raise the max dns workers from 50 to 100.
36948 - Discourage people from setting their dirfetchpostperiod more often
36949 than once per minute.
36950 - Protect dirservers from overzealous descriptor uploading -- wait
36951 10 seconds after directory gets dirty, before regenerating.
36954 Changes in version 0.0.8 - 2004-08-25
36955 o Port it to SunOS 5.9 / Athena
36958 Changes in version 0.0.8rc2 - 2004-08-20
36959 o Make it compile on cygwin again.
36960 o When picking unverified routers, skip those with low uptime and/or
36961 low bandwidth, depending on what properties you care about.
36964 Changes in version 0.0.8rc1 - 2004-08-18
36965 o Changes from 0.0.7.3:
36967 - Fix assert triggers: if the other side returns an address 0.0.0.0,
36968 don't put it into the client dns cache.
36969 - If a begin failed due to exit policy, but we believe the IP address
36970 should have been allowed, switch that router to exitpolicy reject *:*
36971 until we get our next directory.
36973 - Clients choose nodes proportional to advertised bandwidth.
36974 - Avoid using nodes with low uptime as introduction points.
36975 - Handle servers with dynamic IP addresses: don't replace
36976 options->Address with the resolved one at startup, and
36977 detect our address right before we make a routerinfo each time.
36978 - 'FascistFirewall' option to pick dirservers and ORs on specific
36979 ports; plus 'FirewallPorts' config option to tell FascistFirewall
36980 which ports are open. (Defaults to 80,443)
36981 - Be more aggressive about trying to make circuits when the network
36982 has changed (e.g. when you unsuspend your laptop).
36983 - Check for time skew on http headers; report date in response to
36985 - If the entrynode config line has only one node, don't pick it as
36987 - Add strict{entry|exit}nodes config options. If set to 1, then
36988 we refuse to build circuits that don't include the specified entry
36990 - OutboundBindAddress config option, to bind to a specific
36991 IP address for outgoing connect()s.
36992 - End truncated log entries (e.g. directories) with "[truncated]".
36994 o Patches to 0.0.8preX:
36996 - Patches to compile and run on win32 again (maybe)?
36997 - Fix crash when looking for ~/.torrc with no $HOME set.
36998 - Fix a race bug in the unit tests.
36999 - Handle verified/unverified name collisions better when new
37000 routerinfo's arrive in a directory.
37001 - Sometimes routers were getting entered into the stats before
37002 we'd assigned their identity_digest. Oops.
37003 - Only pick and establish intro points after we've gotten a
37006 - AllowUnverifiedNodes config option to let circuits choose no-name
37007 routers in entry,middle,exit,introduction,rendezvous positions.
37008 Allow middle and rendezvous positions by default.
37009 - Add a man page for tor-resolve.
37012 Changes in version 0.0.7.3 - 2004-08-12
37013 o Stop dnsworkers from triggering an assert failure when you
37014 ask them to resolve the host "".
37017 Changes in version 0.0.8pre3 - 2004-08-09
37018 o Changes from 0.0.7.2:
37019 - Allow multiple ORs with same nickname in routerlist -- now when
37020 people give us one identity key for a nickname, then later
37021 another, we don't constantly complain until the first expires.
37022 - Remember used bandwidth (both in and out), and publish 15-minute
37023 snapshots for the past day into our descriptor.
37024 - You can now fetch $DIRURL/running-routers to get just the
37025 running-routers line, not the whole descriptor list. (But
37026 clients don't use this yet.)
37027 - When people mistakenly use Tor as an http proxy, point them
37028 at the tor-doc.html rather than the INSTALL.
37029 - Remove our mostly unused -- and broken -- hex_encode()
37030 function. Use base16_encode() instead. (Thanks to Timo Lindfors
37031 for pointing out this bug.)
37032 - Rotate onion keys every 12 hours, not every 2 hours, so we have
37033 fewer problems with people using the wrong key.
37034 - Change the default exit policy to reject the default edonkey,
37035 kazaa, gnutella ports.
37036 - Add replace_file() to util.[ch] to handle win32's rename().
37038 o Changes from 0.0.8preX:
37039 - Fix two bugs in saving onion keys to disk when rotating, so
37040 hopefully we'll get fewer people using old onion keys.
37041 - Fix an assert error that was making SocksPolicy not work.
37042 - Be willing to expire routers that have an open dirport -- it's
37043 just the authoritative dirservers we want to not forget.
37044 - Reject tor-resolve requests for .onion addresses early, so we
37045 don't build a whole rendezvous circuit and then fail.
37046 - When you're warning a server that he's unverified, don't cry
37047 wolf unpredictably.
37048 - Fix a race condition: don't try to extend onto a connection
37049 that's still handshaking.
37050 - For servers in clique mode, require the conn to be open before
37051 you'll choose it for your path.
37052 - Fix some cosmetic bugs about duplicate mark-for-close, lack of
37053 end relay cell, etc.
37054 - Measure bandwidth capacity over the last 24 hours, not just 12
37055 - Bugfix: authoritative dirservers were making and signing a new
37056 directory for each client, rather than reusing the cached one.
37059 Changes in version 0.0.8pre2 - 2004-08-04
37060 o Changes from 0.0.7.2:
37062 - Check directory signature _before_ you decide whether you're
37063 you're running an obsolete version and should exit.
37064 - Check directory signature _before_ you parse the running-routers
37065 list to decide who's running or verified.
37066 - Bugfixes and features:
37067 - Check return value of fclose while writing to disk, so we don't
37068 end up with broken files when servers run out of disk space.
37069 - Log a warning if the user uses an unsafe socks variant, so people
37070 are more likely to learn about privoxy or socat.
37071 - Dirservers now include RFC1123-style dates in the HTTP headers,
37072 which one day we will use to better detect clock skew.
37074 o Changes from 0.0.8pre1:
37075 - Make it compile without warnings again on win32.
37076 - Log a warning if you're running an unverified server, to let you
37077 know you might want to get it verified.
37078 - Only pick a default nickname if you plan to be a server.
37081 Changes in version 0.0.8pre1 - 2004-07-23
37083 - Made our unit tests compile again on OpenBSD 3.5, and tor
37084 itself compile again on OpenBSD on a sparc64.
37085 - We were neglecting milliseconds when logging on win32, so
37086 everything appeared to happen at the beginning of each second.
37088 o Protocol changes:
37089 - 'Extend' relay cell payloads now include the digest of the
37090 intended next hop's identity key. Now we can verify that we're
37091 extending to the right router, and also extend to routers we
37092 hadn't heard of before.
37095 - Tor nodes can now act as relays (with an advertised ORPort)
37096 without being manually verified by the dirserver operators.
37097 - Uploaded descriptors of unverified routers are now accepted
37098 by the dirservers, and included in the directory.
37099 - Verified routers are listed by nickname in the running-routers
37100 list; unverified routers are listed as "$<fingerprint>".
37101 - We now use hash-of-identity-key in most places rather than
37102 nickname or addr:port, for improved security/flexibility.
37103 - To avoid Sybil attacks, paths still use only verified servers.
37104 But now we have a chance to play around with hybrid approaches.
37105 - Nodes track bandwidth usage to estimate capacity (not used yet).
37106 - ClientOnly option for nodes that never want to become servers.
37107 - Directory caching.
37108 - "AuthoritativeDir 1" option for the official dirservers.
37109 - Now other nodes (clients and servers) will cache the latest
37110 directory they've pulled down.
37111 - They can enable their DirPort to serve it to others.
37112 - Clients will pull down a directory from any node with an open
37113 DirPort, and check the signature/timestamp correctly.
37114 - Authoritative dirservers now fetch directories from other
37115 authdirservers, to stay better synced.
37116 - Running-routers list tells who's down also, along with noting
37117 if they're verified (listed by nickname) or unverified (listed
37119 - Allow dirservers to serve running-router list separately.
37120 This isn't used yet.
37121 - ORs connect-on-demand to other ORs
37122 - If you get an extend cell to an OR you're not connected to,
37123 connect, handshake, and forward the create cell.
37124 - The authoritative dirservers stay connected to everybody,
37125 and everybody stays connected to 0.0.7 servers, but otherwise
37126 clients/servers expire unused connections after 5 minutes.
37127 - When servers get a sigint, they delay 30 seconds (refusing new
37128 connections) then exit. A second sigint causes immediate exit.
37129 - File and name management:
37130 - Look for .torrc if no CONFDIR "torrc" is found.
37131 - If no datadir is defined, then choose, make, and secure ~/.tor
37133 - If torrc not found, exitpolicy reject *:*.
37134 - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
37135 - If no nickname is defined, derive default from hostname.
37136 - Rename secret key files, e.g. identity.key -> secret_id_key,
37137 to discourage people from mailing their identity key to tor-ops.
37138 - Refuse to build a circuit before the directory has arrived --
37139 it won't work anyway, since you won't know the right onion keys
37141 - Try other dirservers immediately if the one you try is down. This
37142 should tolerate down dirservers better now.
37143 - Parse tor version numbers so we can do an is-newer-than check
37144 rather than an is-in-the-list check.
37145 - New socks command 'resolve', to let us shim gethostbyname()
37147 - A 'tor_resolve' script to access the socks resolve functionality.
37148 - A new socks-extensions.txt doc file to describe our
37149 interpretation and extensions to the socks protocols.
37150 - Add a ContactInfo option, which gets published in descriptor.
37151 - Publish OR uptime in descriptor (and thus in directory) too.
37152 - Write tor version at the top of each log file
37153 - New docs in the tarball:
37155 - Document that you should proxy your SSL traffic too.
37158 Changes in version 0.0.7.2 - 2004-07-07
37159 o A better fix for the 0.0.0.0 problem, that will hopefully
37160 eliminate the remaining related assertion failures.
37163 Changes in version 0.0.7.1 - 2004-07-04
37164 o When an address resolves to 0.0.0.0, treat it as a failed resolve,
37165 since internally we use 0.0.0.0 to signify "not yet resolved".
37168 Changes in version 0.0.7 - 2004-06-07
37169 o Updated the man page to reflect the new features.
37172 Changes in version 0.0.7rc2 - 2004-06-06
37173 o Changes from 0.0.7rc1:
37174 - Make it build on Win32 again.
37175 o Changes from 0.0.6.2:
37176 - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
37180 Changes in version 0.0.7rc1 - 2004-06-02
37182 - On sighup, we were adding another log without removing the first
37183 one. So log messages would get duplicated n times for n sighups.
37184 - Several cases of using a connection after we'd freed it. The
37185 problem was that connections that are pending resolve are in both
37186 the pending_resolve tree, and also the circuit's resolving_streams
37187 list. When you want to remove one, you must remove it from both.
37188 - Fix a double-mark-for-close where an end cell arrived for a
37189 resolving stream, and then the resolve failed.
37190 - Check directory signatures based on name of signer, not on whom
37191 we got the directory from. This will let us cache directories more
37194 - Crank up some of our constants to handle more users.
37197 Changes in version 0.0.7pre1 - 2004-06-02
37198 o Fixes for crashes and other obnoxious bugs:
37199 - Fix an epipe bug: sometimes when directory connections failed
37200 to connect, we would give them a chance to flush before closing
37202 - When we detached from a circuit because of resolvefailed, we
37203 would immediately try the same circuit twice more, and then
37204 give up on the resolve thinking we'd tried three different
37206 - Limit the number of intro circuits we'll attempt to build for a
37207 hidden service per 15-minute period.
37208 - Check recommended-software string *early*, before actually parsing
37209 the directory. Thus we can detect an obsolete version and exit,
37210 even if the new directory format doesn't parse.
37211 o Fixes for security bugs:
37212 - Remember which nodes are dirservers when you startup, and if a
37213 random OR enables his dirport, don't automatically assume he's
37214 a trusted dirserver.
37216 - Directory connections were asking the wrong poll socket to
37217 start writing, and not asking themselves to start writing.
37218 - When we detached from a circuit because we sent a begin but
37219 didn't get a connected, we would use it again the first time;
37220 but after that we would correctly switch to a different one.
37221 - Stop warning when the first onion decrypt attempt fails; they
37222 will sometimes legitimately fail now that we rotate keys.
37223 - Override unaligned-access-ok check when $host_cpu is ia64 or
37224 arm. Apparently they allow it but the kernel whines.
37225 - Dirservers try to reconnect periodically too, in case connections
37227 - Fix some memory leaks in directory servers.
37228 - Allow backslash in Win32 filenames.
37229 - Made Tor build complain-free on FreeBSD, hopefully without
37230 breaking other BSD builds. We'll see.
37232 - Doxygen markup on all functions and global variables.
37233 - Make directory functions update routerlist, not replace it. So
37234 now directory disagreements are not so critical a problem.
37235 - Remove the upper limit on number of descriptors in a dirserver's
37236 directory (not that we were anywhere close).
37237 - Allow multiple logfiles at different severity ranges.
37238 - Allow *BindAddress to specify ":port" rather than setting *Port
37239 separately. Allow multiple instances of each BindAddress config
37240 option, so you can bind to multiple interfaces if you want.
37241 - Allow multiple exit policy lines, which are processed in order.
37242 Now we don't need that huge line with all the commas in it.
37243 - Enable accept/reject policies on SOCKS connections, so you can bind
37244 to 0.0.0.0 but still control who can use your OP.
37247 Changes in version 0.0.6.2 - 2004-05-16
37248 o Our integrity-checking digest was checking only the most recent cell,
37249 not the previous cells like we'd thought.
37250 Thanks to Stefan Mark for finding the flaw!
37253 Changes in version 0.0.6.1 - 2004-05-06
37254 o Fix two bugs in our AES counter-mode implementation (this affected
37255 onion-level stream encryption, but not TLS-level). It turns
37256 out we were doing something much more akin to a 16-character
37257 polyalphabetic cipher. Oops.
37258 Thanks to Stefan Mark for finding the flaw!
37259 o Retire moria3 as a directory server, and add tor26 as a directory
37263 Changes in version 0.0.6 - 2004-05-02
37264 [version bump only]
37267 Changes in version 0.0.6rc4 - 2004-05-01
37268 o Update the built-in dirservers list to use the new directory format
37269 o Fix a rare seg fault: if a node offering a hidden service attempts
37270 to build a circuit to Alice's rendezvous point and fails before it
37271 reaches the last hop, it retries with a different circuit, but
37273 o Handle windows socket errors correctly.
37276 Changes in version 0.0.6rc3 - 2004-04-28
37277 o Don't expire non-general excess circuits (if we had enough
37278 circuits open, we were expiring rendezvous circuits -- even
37279 when they had a stream attached. oops.)
37280 o Fetch randomness from /dev/urandom better (not via fopen/fread)
37281 o Better debugging for tls errors
37282 o Some versions of openssl have an SSL_pending function that erroneously
37283 returns bytes when there is a non-application record pending.
37284 o Set Content-Type on the directory and hidserv descriptor.
37285 o Remove IVs from cipher code, since AES-ctr has none.
37286 o Win32 fixes. Tor now compiles on win32 with no warnings/errors.
37287 o We were using an array of length zero in a few places.
37288 o win32's gethostbyname can't resolve an IP to an IP.
37289 o win32's close can't close a socket.
37292 Changes in version 0.0.6rc2 - 2004-04-26
37293 o Fix a bug where we were closing tls connections intermittently.
37294 It turns out openssl keeps its errors around -- so if an error
37295 happens, and you don't ask about it, and then another openssl
37296 operation happens and succeeds, and you ask if there was an error,
37297 it tells you about the first error. Fun fun.
37298 o Fix a bug that's been lurking since 27 may 03 (!)
37299 When passing back a destroy cell, we would use the wrong circ id.
37300 'Mostly harmless', but still worth fixing.
37301 o Since we don't support truncateds much, don't bother sending them;
37302 just close the circ.
37303 o check for <machine/limits.h> so we build on NetBSD again (I hope).
37304 o don't crash if a conn that sent a begin has suddenly lost its circuit
37305 (this was quite rare).
37308 Changes in version 0.0.6rc1 - 2004-04-25
37309 o We now rotate link (tls context) keys and onion keys.
37310 o CREATE cells now include oaep padding, so you can tell
37311 if you decrypted them correctly.
37312 o Add bandwidthburst to server descriptor.
37313 o Directories now say which dirserver signed them.
37314 o Use a tor_assert macro that logs failed assertions too.
37317 Changes in version 0.0.6pre5 - 2004-04-18
37318 o changes from 0.0.6pre4:
37319 - make tor build on broken freebsd 5.2 installs
37320 - fix a failed assert when you try an intro point, get a nack, and try
37321 a second one and it works.
37322 - when alice uses a port that the hidden service doesn't accept,
37323 it now sends back an end cell (denied by exit policy). otherwise
37324 alice would just have to wait to time out.
37325 - fix another rare bug: when we had tried all the intro
37326 points for a hidden service, we fetched the descriptor
37327 again, but we left our introcirc thinking it had already
37328 sent an intro, so it kept waiting for a response...
37329 - bugfix: when you sleep your hidden-service laptop, as soon
37330 as it wakes up it tries to upload a service descriptor, but
37331 socketpair fails for some reason (localhost not up yet?).
37332 now we simply give up on that upload, and we'll try again later.
37333 i'd still like to find the bug though.
37334 - if an intro circ waiting for an ack dies before getting one, then
37336 - we were reusing stale service descriptors and refetching usable
37340 Changes in version 0.0.6pre4 - 2004-04-14
37341 o changes from 0.0.6pre3:
37342 - when bob fails to connect to the rendezvous point, and his
37343 circ didn't fail because of the rendezvous point itself, then
37344 he retries a couple of times
37345 - we expire introduction and rendezvous circs more thoroughly
37346 (sometimes they were hanging around forever)
37347 - we expire unattached rendezvous streams that have been around
37348 too long (they were sticking around forever).
37349 - fix a measly fencepost error that was crashing everybody with
37353 Changes in version 0.0.6pre3 - 2004-04-14
37354 o changes from 0.0.6pre2:
37355 - make hup work again
37356 - fix some memory leaks for dirservers
37357 - allow more skew in rendezvous descriptor timestamps, to help
37358 handle people like blanu who don't know what time it is
37359 - normal circs are 3 hops, but some rend/intro circs are 4, if
37360 the initiator doesn't get to choose the last hop
37361 - send acks for introductions, so alice can know whether to try
37363 - bob publishes intro points more correctly
37364 o changes from 0.0.5:
37365 - fix an assert trigger that's been plaguing us since the days
37366 of 0.0.2prexx (thanks weasel!)
37367 - retry stream correctly when we fail to connect because of
37368 exit-policy-reject (should try another) or can't-resolve-address
37369 (also should try another, because dns on random internet servers
37371 - when we hup a dirserver and we've *removed* a server from the
37372 approved-routers list, now we remove that server from the
37373 in-memory directories too
37376 Changes in version 0.0.6pre2 - 2004-04-08
37377 o We fixed our base32 implementation. Now it works on all architectures.
37380 Changes in version 0.0.6pre1 - 2004-04-08
37382 - Hidden services and rendezvous points are implemented. Go to
37383 http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
37384 hidden services. (This only works via a socks4a proxy such as
37385 Privoxy, and currently it's quite slow.)
37388 Changes in version 0.0.5 - 2004-03-30
37389 [version bump only]
37392 Changes in version 0.0.5rc3 - 2004-03-29
37393 o Install torrc as torrc.sample -- we no longer clobber your
37395 o Re-enable recommendedversion checking (we broke it in rc2, oops)
37396 o Add in a 'notice' log level for things the operator should hear
37397 but that aren't warnings
37400 Changes in version 0.0.5rc2 - 2004-03-29
37401 o Hold socks connection open until reply is flushed (if possible)
37402 o Make exit nodes resolve IPs to IPs immediately, rather than asking
37403 the dns farm to do it.
37404 o Fix c99 aliasing warnings in rephist.c
37405 o Don't include server descriptors that are older than 24 hours in the
37407 o Give socks 'reject' replies their whole 15s to attempt to flush,
37408 rather than seeing the 60s timeout and assuming the flush had failed.
37409 o Clean automake droppings from the cvs repository
37412 Changes in version 0.0.5rc1 - 2004-03-28
37413 o Fix mangled-state bug in directory fetching (was causing sigpipes).
37414 o Only build circuits after we've fetched the directory: clients were
37415 using only the directory servers before they'd fetched a directory.
37416 This also means longer startup time; so it goes.
37417 o Fix an assert trigger where an OP would fail to handshake, and we'd
37418 expect it to have a nickname.
37419 o Work around a tsocks bug: do a socks reject when AP connection dies
37420 early, else tsocks goes into an infinite loop.
37423 Changes in version 0.0.4 - 2004-03-26
37424 o When connecting to a dirserver or OR and the network is down,
37428 Changes in version 0.0.3 - 2004-03-26
37429 o Warn and fail if server chose a nickname with illegal characters
37430 o Port to Solaris and Sparc:
37431 - include missing header fcntl.h
37432 - have autoconf find -lsocket -lnsl automatically
37433 - deal with hardware word alignment
37434 - make uname() work (solaris has a different return convention)
37435 - switch from using signal() to sigaction()
37436 o Preliminary work on reputation system:
37437 - Keep statistics on success/fail of connect attempts; they're published
37438 by kill -USR1 currently.
37439 - Add a RunTesting option to try to learn link state by creating test
37440 circuits, even when SocksPort is off.
37441 - Remove unused open circuits when there are too many.
37444 Changes in version 0.0.2 - 2004-03-19
37445 - Include strlcpy and strlcat for safer string ops
37446 - define INADDR_NONE so we compile (but still not run) on solaris
37449 Changes in version 0.0.2pre27 - 2004-03-14
37451 - Allow internal tor networks (we were rejecting internal IPs,
37452 now we allow them if they're set explicitly).
37453 - And fix a few endian issues.
37456 Changes in version 0.0.2pre26 - 2004-03-14
37458 - If a stream times out after 15s without a connected cell, don't
37459 try that circuit again: try a new one.
37460 - Retry streams at most 4 times. Then give up.
37461 - When a dirserver gets a descriptor from an unknown router, it
37462 logs its fingerprint (so the dirserver operator can choose to
37463 accept it even without mail from the server operator).
37464 - Inform unapproved servers when we reject their descriptors.
37465 - Make tor build on Windows again. It works as a client, who knows
37467 - Clearer instructions in the torrc for how to set up a server.
37468 - Be more efficient about reading fd's when our global token bucket
37469 (used for rate limiting) becomes empty.
37471 - Stop asserting that computers always go forward in time. It's
37473 - When we sent a cell (e.g. destroy) and then marked an OR connection
37474 expired, we might close it before finishing a flush if the other
37475 side isn't reading right then.
37476 - Don't allow dirservers to start if they haven't defined
37477 RecommendedVersions
37478 - We were caching transient dns failures. Oops.
37479 - Prevent servers from publishing an internal IP as their address.
37480 - Address a strcat vulnerability in circuit.c
37483 Changes in version 0.0.2pre25 - 2004-03-04
37485 - Put the OR's IP in its router descriptor, not its fqdn. That way
37486 we'll stop being stalled by gethostbyname for nodes with flaky dns,
37489 - If the user typed in an address that didn't resolve, the server
37493 Changes in version 0.0.2pre24 - 2004-03-03
37495 - Fix an assertion failure in dns.c, where we were trying to dequeue
37496 a pending dns resolve even if it wasn't pending
37497 - Fix a spurious socks5 warning about still trying to write after the
37498 connection is finished.
37499 - Hold certain marked_for_close connections open until they're finished
37500 flushing, rather than losing bytes by closing them too early.
37501 - Correctly report the reason for ending a stream
37502 - Remove some duplicate calls to connection_mark_for_close
37503 - Put switch_id and start_daemon earlier in the boot sequence, so it
37504 will actually try to chdir() to options.DataDirectory
37505 - Make 'make test' exit(1) if a test fails; fix some unit tests
37506 - Make tor fail when you use a config option it doesn't know about,
37507 rather than warn and continue.
37508 - Make --version work
37509 - Bugfixes on the rpm spec file and tor.sh, so it's more up to date
37512 Changes in version 0.0.2pre23 - 2004-02-29
37514 - Print a statement when the first circ is finished, so the user
37515 knows it's working.
37516 - If a relay cell is unrecognized at the end of the circuit,
37517 send back a destroy. (So attacks to mutate cells are more
37519 - New config option 'excludenodes' to avoid certain nodes for circuits.
37520 - When it daemonizes, it chdir's to the DataDirectory rather than "/",
37521 so you can collect coredumps there.
37523 - Fix a bug in tls flushing where sometimes data got wedged and
37524 didn't flush until more data got sent. Hopefully this bug was
37525 a big factor in the random delays we were seeing.
37526 - Make 'connected' cells include the resolved IP, so the client
37527 dns cache actually gets populated.
37528 - Disallow changing from ORPort=0 to ORPort>0 on hup.
37529 - When we time-out on a stream and detach from the circuit, send an
37530 end cell down it first.
37531 - Only warn about an unknown router (in exitnodes, entrynodes,
37532 excludenodes) after we've fetched a directory.
37535 Changes in version 0.0.2pre22 - 2004-02-26
37537 - Servers publish less revealing uname information in descriptors.
37538 - More memory tracking and assertions, to crash more usefully when
37540 - If the default torrc isn't there, just use some default defaults.
37541 Plus provide an internal dirservers file if they don't have one.
37542 - When the user tries to use Tor as an http proxy, give them an http
37543 501 failure explaining that we're a socks proxy.
37544 - Dump a new router.desc on hup, to help confused people who change
37545 their exit policies and then wonder why router.desc doesn't reflect
37547 - Clean up the generic tor.sh init script that we ship with.
37549 - If the exit stream is pending on the resolve, and a destroy arrives,
37550 then the stream wasn't getting removed from the pending list. I
37551 think this was the one causing recent server crashes.
37552 - Use a more robust poll on OSX 10.3, since their poll is flaky.
37553 - When it couldn't resolve any dirservers, it was useless from then on.
37554 Now it reloads the RouterFile (or default dirservers) if it has no
37556 - Move the 'tor' binary back to /usr/local/bin/ -- it turns out
37557 many users don't even *have* a /usr/local/sbin/.
37560 Changes in version 0.0.2pre21 - 2004-02-18
37562 - There's a ChangeLog file that actually reflects the changelog.
37563 - There's a 'torify' wrapper script, with an accompanying
37564 tor-tsocks.conf, that simplifies the process of using tsocks for
37565 tor. It even has a man page.
37566 - The tor binary gets installed to sbin rather than bin now.
37567 - Retry streams where the connected cell hasn't arrived in 15 seconds
37568 - Clean up exit policy handling -- get the default out of the torrc,
37569 so we can update it without forcing each server operator to fix
37571 - Allow imaps and pop3s in default exit policy
37573 - Prevent picking middleman nodes as the last node in the circuit
37576 Changes in version 0.0.2pre20 - 2004-01-30
37578 - We now have a deb package, and it's in debian unstable. Go to
37579 it, apt-getters. :)
37580 - I've split the TotalBandwidth option into BandwidthRate (how many
37581 bytes per second you want to allow, long-term) and
37582 BandwidthBurst (how many bytes you will allow at once before the cap
37583 kicks in). This better token bucket approach lets you, say, set
37584 BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
37585 performance while not exceeding your monthly bandwidth quota.
37586 - Push out a tls record's worth of data once you've got it, rather
37587 than waiting until you've read everything waiting to be read. This
37588 may improve performance by pipelining better. We'll see.
37589 - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
37590 from failed circuits (if they haven't been connected yet) and attach
37592 - Expire old streams that haven't managed to connect. Some day we'll
37593 have them reattach to new circuits instead.
37596 - Fix several memory leaks that were causing servers to become bloated
37598 - Fix a few very rare assert triggers. A few more remain.
37599 - Setuid to User _before_ complaining about running as root.
37602 Changes in version 0.0.2pre19 - 2004-01-07
37604 - Fix deadlock condition in dns farm. We were telling a child to die by
37605 closing the parent's file descriptor to him. But newer children were
37606 inheriting the open file descriptor from the parent, and since they
37607 weren't closing it, the socket never closed, so the child never read
37608 eof, so he never knew to exit. Similarly, dns workers were holding
37609 open other sockets, leading to all sorts of chaos.
37610 - New cleaner daemon() code for forking and backgrounding.
37611 - If you log to a file, it now prints an entry at the top of the
37612 logfile so you know it's working.
37613 - The onionskin challenge length was 30 bytes longer than necessary.
37614 - Started to patch up the spec so it's not quite so out of date.
37617 Changes in version 0.0.2pre18 - 2004-01-02
37619 - Fix endian issues with the 'integrity' field in the relay header.
37620 - Fix a potential bug where connections in state
37621 AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
37624 Changes in version 0.0.2pre17 - 2003-12-30
37626 - Made --debuglogfile (or any second log file, actually) work.
37627 - Resolved an edge case in get_unique_circ_id_by_conn where a smart
37628 adversary could force us into an infinite loop.
37631 - Each onionskin handshake now includes a hash of the computed key,
37632 to prove the server's identity and help perfect forward secrecy.
37633 - Changed cell size from 256 to 512 bytes (working toward compatibility
37635 - Changed cell length to 2 bytes, and moved it to the relay header.
37636 - Implemented end-to-end integrity checking for the payloads of
37638 - Separated streamid from 'recognized' (otherwise circuits will get
37639 messed up when we try to have streams exit from the middle). We
37640 use the integrity-checking to confirm that a cell is addressed to
37642 - Randomize the initial circid and streamid values, so an adversary who
37643 breaks into a node can't learn how many circuits or streams have
37647 Changes in version 0.0.2pre16 - 2003-12-14
37649 - Fixed a bug that made HUP trigger an assert
37650 - Fixed a bug where a circuit that immediately failed wasn't being
37651 counted as a failed circuit in counting retries.
37654 - Now we close the circuit when we get a truncated cell: otherwise we're
37655 open to an anonymity attack where a bad node in the path truncates
37656 the circuit and then we open streams at him.
37657 - Add port ranges to exit policies
37658 - Add a conservative default exit policy
37659 - Warn if you're running tor as root
37660 - on HUP, retry OR connections and close/rebind listeners
37661 - options.EntryNodes: try these nodes first when picking the first node
37662 - options.ExitNodes: if your best choices happen to include any of
37663 your preferred exit nodes, you choose among just those preferred
37665 - options.ExcludedNodes: nodes that are never picked in path building
37668 Changes in version 0.0.2pre15 - 2003-12-03
37669 o Robustness and bugfixes:
37670 - Sometimes clients would cache incorrect DNS resolves, which would
37671 really screw things up.
37672 - An OP that goes offline would slowly leak all its sockets and stop
37674 - A wide variety of bugfixes in exit node selection, exit policy
37675 handling, and processing pending streams when a new circuit is
37677 - Pick nodes for a path only from those the directory says are up
37678 - Choose randomly from all running dirservers, not always the first one
37679 - Increase allowed http header size for directory fetch.
37680 - Stop writing to stderr (if we're daemonized it will be closed).
37681 - Enable -g always, so cores will be more useful to me.
37682 - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
37685 - Wrote a man page. It lists commonly used options.
37688 - Change default loglevel to warn.
37689 - Make PidFile default to null rather than littering in your CWD.
37690 - OnionRouter config option is now obsolete. Instead it just checks
37692 - Moved to a single unified torrc file for both clients and servers.
37695 Changes in version 0.0.2pre14 - 2003-11-29
37696 o Robustness and bugfixes:
37697 - Force the admin to make the DataDirectory himself
37698 - to get ownership/permissions right
37699 - so clients no longer make a DataDirectory and then never use it
37700 - fix bug where a client who was offline for 45 minutes would never
37701 pull down a directory again
37702 - fix (or at least hide really well) the dns assert bug that was
37703 causing server crashes
37704 - warnings and improved robustness wrt clockskew for certs
37705 - use the native daemon(3) to daemonize, when available
37706 - exit if bind() fails
37707 - exit if neither socksport nor orport is defined
37708 - include our own tor_timegm (Win32 doesn't have its own)
37709 - bugfix for win32 with lots of connections
37710 - fix minor bias in PRNG
37711 - make dirserver more robust to corrupt cached directory
37714 - Wrote the design document (woo)
37716 o Circuit building and exit policies:
37717 - Circuits no longer try to use nodes that the directory has told them
37719 - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
37720 bitcounts (18.0.0.0/8).
37721 - Make AP connections standby for a circuit if no suitable circuit
37722 exists, rather than failing
37723 - Circuits choose exit node based on addr/port, exit policies, and
37724 which AP connections are standing by
37725 - Bump min pathlen from 2 to 3
37726 - Relay end cells have a payload to describe why the stream ended.
37727 - If the stream failed because of exit policy, try again with a new
37729 - Clients have a dns cache to remember resolved addresses.
37730 - Notice more quickly when we have no working circuits
37733 - APPort is now called SocksPort
37734 - SocksBindAddress, ORBindAddress, DirBindAddress let you configure
37736 - RecommendedVersions is now a config variable rather than
37737 hardcoded (for dirservers)
37738 - Reloads config on HUP
37739 - Usage info on -h or --help
37740 - If you set User and Group config vars, it'll setu/gid to them.
37743 Changes in version 0.0.2pre13 - 2003-10-19
37744 o General stability:
37745 - SSL_write no longer fails when it returns WANTWRITE and the number
37746 of bytes in the buf has changed by the next SSL_write call.
37747 - Fix segfault fetching directory when network is down
37748 - Fix a variety of minor memory leaks
37749 - Dirservers reload the fingerprints file on HUP, so I don't have
37750 to take down the network when I approve a new router
37751 - Default server config file has explicit Address line to specify fqdn
37754 - Buffers grow and shrink as needed (Cut process size from 20M to 2M)
37755 - Make listener connections not ever alloc bufs
37757 o Autoconf improvements:
37758 - don't clobber an external CFLAGS in ./configure
37759 - Make install now works
37760 - create var/lib/tor on make install
37761 - autocreate a tor.sh initscript to help distribs
37762 - autocreate the torrc and sample-server-torrc with correct paths
37764 o Log files and Daemonizing now work:
37765 - If --DebugLogFile is specified, log to it at -l debug
37766 - If --LogFile is specified, use it instead of commandline
37767 - If --RunAsDaemon is set, tor forks and backgrounds on startup